bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Coal Fly Ash as Additive on the Sulfur Retention of Coal Briquette
Authors: Guo Yan Xia , Li Yu Ting , Cheng Fang Qin , Yang Feng Ling
Published: June 2012

Clean coal briquette is one of the most effective techniques to remove SO2 from coal combustion by using sulfur-retention agent to retain sulfur in coal residuals. Ca(OH)2 has been proved to be an effective sulfur-retention agent. CaSO4 as the primary sulfur-containing product, however, is thermal unstable at high temperatures. It has been reported that SiO2, Al2O3, Fe2O3 etc. are excellent sulfur retention additives, those are abundant in coal fly ash. In this study coal fly ash was used to the additive to improve the sulfur retention of coal briquette. The results showed that the addition of coal fly ash can improve the sulfur retention. The modified coal fly ash obtained by calcinations assisted with Ca(OH)2 can improve the sulfur retention more noticeable. The SEM and XRD results further indicated that coal fly ash promoted the formation of the sulfur-containing products such as Ca-Si-S-O compounds with high thermally stability.
Influence of Preparation Conditions of Sb-SnO2 Interlayers on Characteristics of Ti/Sb-SnO2/PbO2 Anodes
Authors: Wang Shu Yong , Zhang Xiao Xing , Wang Ya Qiong , Xu Wen Lin
Published: June 2012

Ti-based PbO2 electrodes with Sb-SnO2 interlayers were prepared by thermal decomposition. The effects of calcination temperature and Sb content of the Sb-SnO2 interlayer on the service life and microstructural characteristics of the Ti/Sb-SnO2/PbO2 anodes were investigated. The results show that the Ti-based PbO2 electrodes without the Sb-SnO2 interlayer, Ti/PbO2 electrodes, are rapidly deactivated at the experiment conditions, while the service life of the Ti/Sb-SnO2/PbO2 electrodes increases remarkably. Calcination temperature and Sb content for preparing the Sb-SnO2 interlayer exhibit remarkable effects on the service life of the Ti/Sb-SnO2/PbO2 anodes.
Numerical Simulation on Cracked Plate Repaired with Carbon-Fiber Wrapped Composite Material
Authors: Liu Jun , Wang Xing Feng , Chang Xue Ping
Published: June 2012

The behavior of a center-cracked aluminum plate repaired with carbon-fiber wrapped composite material under axial loading is investigated. The carbon-fiber wrapped composite material is simulated as transversely isotropic material by means of an equivalent modulus method. The repair patch is applied on one side of the cracked plate. The stress intensity factors along the crack front and the stress distribution at the repair domain are examined. The numerical simulation results indicate that the carbon-fiber wrapped composite material performs very well in the repair to cracked plate and an appropriate thickness of the repair patch needs to be selected.
Some Villas Solar Heating and Air Conditioning System Design of Double-Source Heat Pump Programmer
Authors: Yu Wei , Chen Feng , Li Hong Bo
Published: June 2012

This article on a villas in Langfang city, Hebei province, heating and air conditioning systems. According to the owners of the double requirement of energy saving and environmental protection to owners selection of solar energy and geothermal heat pump heating system combined. To better achieve heating and air conditioning energy saving operation of villas, the system can be run by optimizing the control scheme, time-sharing partition building heat adjustment.
Reaction Sintering of Mg2Si Intermetallic Compound by Microwave Irradiation
Authors: Du Chang Kun , Zhou Shu Cai
Published: June 2012

In order to reduce the oxidizing and volatilizing caused by Mg element in the traditional methods for synthesizing Mg2Si compounds, solid state phase reaction at low temperature was introduced by microwave field. XRD was used to characterize the powders. At the same time, the influences of parameters during the synthesis processing were discussed. The results suggest that the heating profile is also dependent on the initial green density and higher green density provides lower heating rate while power setting are fixed and the oxidation of Mg can be rest rained by changing microwave heating programs. It was found that high purity Mg2Si intermetallic compound can be obtained with excessive content of 8at% Mg from the stoichiometric Mg2Si, 853K and 30min
Study on Development and Application of Green Environmental Clothing Materials
Authors: Cui Yu Mei , Pan Song , Meng Xiang Ling
Published: June 2012

Nowadays, human society is facing three major issues: environment, resource and population, among which environmental issue is especially outstanding. With the rapid development of global economy and science and technology, more and more people begin to pay attention to the deteriorating environment, in particular, limited resource and unsustainable environment are realized by more countries. Western countries proposed application of environmental protection concept to modern human industrial activities very early. Based on this, research and development of environmental clothes began in 1930s, when western countries started to study environmental clothes for the purpose of security and strategy. It becomes consumers’ rational demand to choose environmental clothes.
Study on the Critical Temperature of Coal Ash Slagging on the Refractory
Authors: Chen Yan Fei , Liu Xuan Ya , Chen Dong Lin , Zhuang Shuang
Published: June 2012

In this paper, the coal ash /refractory samples were sintered in the furnace at certain temperature for 20h. Then three tests were made by visual observation method, XRD analysis of the coal ash and electromagnetic vibration of the coal ash/ refractory samples respectively in this paper to determine the critical temperature of three coal ashes on the corundum based refractories. Finally, the result shows that the electromagnetic vibration test is the most effective method with a better discriminabiltity on slagging intensity to determine the critical temperature of the coal ash slagging on the refractory. And furthermore, it advances a new and reliable method to determine the critical temperature on the refractories.
Template-Free Electrochemical Synthesis of Well-Aligned Polypyrrole Nanofibers for Electrochemical Supercapacitors
Authors: Li Jing , Xie Hua Qing , Li Yang
Published: June 2012

A new well-aligned nanofibers structure of polypyrrole (WAPPy) has been successfully grown on glassy carbon electrode by using a simple, reliable, and template-free electrochemical technique. The unique structure and design not only reduces the diffusion resistance of electrolytes in the electrode material but also enhances its electrochemical performance. Electrochemical supercapacitors based on WAPPy achieved a specific capacitance of 365 F g-1 with an applied charge/discharge current density of 1 A g-1 over a potential window of -0.5 to 0.5 V. For comparison, the granules PPy particles have been also electrochemical synthesized by using KCl as electrolyte (PPy-Cl). The specific capacitance of PPy-Cl electrode is 120 F g-1. The high specific capacitance and good stability of the WAPPy electrode has great potential in various applications such as energy storage.
Twist Springback Measurement of AUV Propeller Blade Based on Profile Deviation
Authors: Abdullah A.B. , Sapuan S.M. , Samad Z. , Khaleed M.T. , Husaini M. , Aziz N.A.
Published: June 2012

Geometrical error due to twist springback is one of major defects found in the near net or net shape part. It becomes more critical for complex part such as an Autonomous Underwater Vehicle (AUV) propeller blade. In this study, twist springback was quantified by comparing the blade and the die profiles obtained from commercial optical technique namely Alicona system. The results show a different pattern, where the twist springback becomes larger as the twist angle increases moving to the tip. The results show a strong agreement with the experiment.
Characterization of SEI Layer Formed on Tin Film Anode
Authors: Zhao Ling Zhi , Lai Xin Fang , Niu Qiao Li , Li Chang Ming
Published: June 2012

Tin thin film on Cu foil substrate as the anode of lithium ion battery was prepared by direct current (DC) magnetron sputtering. The surface morphology and the solid electrolyte interphase (SEI) layer were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS). It is found that the SEI layer should be formed on the surface of the tin electrode after initial discharge processes, just like the carbon anode of lithium ion battery. The SEI layer undergoes continuous reformation during the initial cycles. The tin in the electrode can be covered completely by SEI layer after 3rd discharge process. The carbon in SEI layer is mainly in the form of -CO32- , which makes up about 54.5 at%.
Influence of the Compressive Stress on the Corrosion of Petroleum Casing Premium Connection Material
Authors: Yin Cheng Xian , Wang Xin Hu
Published: June 2012

In order to find the corrosion cause of petroleum casing premium connection material, the fixture was design to simulate material enduring compressive stress, and the fixture was put in high temperature autoclave, and the corrosion rate of two kind casing material(carbon steel and stainless steel) enduring compressive stress were test in H2S and CO2 and Cl- water solution. The result was that compressive stress accelerated the corrosion of petroleum casing steel, and when compressive stress was greater than the value half as the yield strength the corrosion rate increased quickly.
Microstructure and Electrode Characteristics of Ti-V-Cu-Cr-Ni Metal Hydride Electrode Alloy
Authors: Qiao Yu Qing , Zhao Min Shou , Wang Li Min
Published: June 2012

Microstructure and electrode characteristics of Ti-V-Cu-Cr-Ni metal hydride electrode alloy have been investigated by XRD, FESEM-EDS and EIS measurements. The result shows that the alloy is mainly composed of V-based solid solution phase with body-centered-cubic structure and TiNi-based secondary phase. The discharge capacity increases with increasing temperature in a wider temperature region from 303 K to 343 K. The result of electrochemical impedance spectrometry indicates that the charge transfer resistance decreases with increasing temperature, while the exchange current density in the bulk of the alloy increase with increasing temperature.
Numerical Investigations on Thermoelectric Recovery of SiC Ceramics for Supersonic Vehicles Structures
Authors: Han Xiao Yi , Wang Jun , Cheng Hai Feng , Xing Xin
Published: June 2012

The thermoelectric SiC structural materials for supersonic vehicles can convert intense aerodynamic heat to electricity simply by temperature difference. A general model of nose tip is developed to predict the thermal-electrical energy con-version performance of the thermoelectric SiC materials. The temperature distributions of model was obtained by solving the Navier-Stokes (N-S) equations and the heat conduction equation. The largest temperature difference between the hot side and cold side of the hypothetical thermoelectric module is about 275 K. With the thermoelectric properties assumed constant in the presence of temperature gradient, the output power and thermoelectric efficiency of the model are calculated. The maximum of thermoelectric efficiency and output power of the model are 0.4×10-3 W and 1.6×10-4 %, respectively, at a current of 0.014 A. The thermoelectric performance of the model shows great potential for the application of SiC ceramic structures to thermoelectric generation from aerodynamic heat on supersonic vehicles.
Study on Probability Prediction Approach to Holistic Life Based on Fracture Theory
Authors: Zhang Dan Feng , Tan Xiao Ming , Fan Xing , Qi Jia Rui
Published: June 2012

Fatigue life can be divided into crack initiation life and crack propagation life in fatigue damage process. Fatigue crack comes of the initial discontinuity states （IDS） of material, and goes through short crack , long crack and rupture failure. A estimation model based on fracture theory is built, in which includes of IDS, short crack, long crack and rupture failure. A fatigue holistic life (including fatigue life, the residual life and the calendar life ) estimation model was built on the basis of IDS in which the aircraft structures had not been corrosion damage. A lot of fatigue tests with different stress level and different stress ratio are carried out to validate the model. The results demonstrate that the approach is reasonable and feasible.
The Method for Life Evaluation of Internal Coating of in-Service Pipeline Based on Fuzzy Theory
Authors: Ma Wei Feng , Chen Zhi Xin , Luo Jin Heng , Cai Ke , Li Hong Bin
Published: June 2012

In order to improve the scientificity and rationality of life evaluation of internal coating on in-service natural gas pipeline, the evaluation model of life evaluation of internal coating based on fuzzy theory is proposed. The model transforms the fuzzy appraisal of zone index to the overall fuzzy appraisal by fuzzy evaluation, and the final evaluation score can be computed combined with comment set. The model structure and concrete steps have been clarified in this paper, and applied to the life evaluation of resistance-reducing internal coating of five-year-old in-service natural gas pipeline, the application results indicated that it is feasible and has the widespread serviceability.
Calculation of Nanowire Growth Activation Energy
Authors: Lin Hong Yan , Wang Chun Cai , Yu Cui Yan , Xu Tao
Published: June 2012

Two-step preparation technology was used to prepare anodic aluminum oxide (AAO) templates. Then deposit Ni nanowire arrays in nanopores of AAO templates by direct current deposition. TEM spectra of nanowires show that the length of nanowires is uniform and that the shape of nanowires is the same with that of nanopores. Finally, reaction activation energy of Ni growing in nanopores was calculated by experimental data. Results show that Ni growing in the smaller nanopores is much easier than in the bigger nanopores.
Effect of Block Molecular Weight on the Mechanical Properties of PA1010-b-PEG Segmented Block Copolymers
Authors: Huo Li , Dong Cai Xia
Published: June 2012

The mechanical properties were investigated of a series of PA-PEG thermalplastic elastomer based on PA1010 and polytetramethylene glycol (PEG) with varying hard and soft segment content. Dynamic mechanical measurements of these polymers have carried out over a wide range of temperatures. The block copolymers exhibit three peaks, designated as α, β and γ in the tanδ-temperature curve. The α transition shifts to higher temperature with increasing hard block molecular weight. However, at a constant hard molecular weight, the α transition shifts to higher temperature and the damping increases on increasing the soft segment molecular weight. DMA results show that the block copolymers exhibit a microphase separation structure and both soft and hard segments were found to be crystallizable. The degree of phase separation increases with increasing hard block molecular weight.
Effects of Over Fire Air on the Combustion and NOx Emission Characteristics of a 600 MW Opposed Swirling Fired Boiler
Authors: Wu Yu Peng , Wen Zhi Yong , Shen Yue Liang , Fang Qing Yan , Zhang Cheng , Chen Gang
Published: June 2012

A computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established. The chemical percolation devolatilization (CPD) model, instead of an empirical method, has been adapted to predict the nitrogen release during the devolatilization. The current CFD model has been validated by comparing the simulated results with the experimental data obtained from the boiler for case study. The validated CFD model is then applied to study the effects of ratio of over fire air (OFA) on the combustion and nitrogen oxides (NOx) emission characteristics. It is found that, with increasing the ratio of OFA, the carbon content in fly ash increases linearly, and the NOx emission reduces largely. The OFA ratio of 30% is optimal for both high burnout of pulverized coal and low NOx emission. The present study provides helpful information for understanding and optimizing the combustion of the studied boiler
Fischer-Tropsch Synthesis over Co/SiO2 Catalysts Modified with Ethylenediamine
Authors: Wang Yue Lun , Hou Bo , Li De Bao , Chen Jian Gang , Sun Yu Han
Published: June 2012

The influence of ethylenediamine (en)/Co molar ratio on the preparation of Co/SiO2 catalysts was studied. The decomposition of these Co-en species resulted in the formation of small cobalt nanoparticles. The highly dispersed catalysts led to lower FT activity due to an increase of cobalt-silica interaction except Co(en)2/SiO2 catalyst. Meanwhile, higher selectivity for light hydrocarbons was observed, which was ascribed that smaller cobalt particles containing active sites depressed the chain growth.
Fusion Characteristics of Ash Residues from Lignite Gasification
Authors: Li Feng Hai , Huang Jie Jie , Fang Yi Tian , Ma Ming Jie , Wang Yang
Published: June 2012

Fusion characteristics of ash residues from Xiaolongtan lignite pressurized fluidized-bed gasification were investigated with ash fusion point detector and sintering temperature analyzer. The results show that the sintering temperature (Ts) and ash fusion temperature (AFT) of three ashes residues decrease from gangue ashes to agglomerate to slag, which result from the differences of mineral type and content in three ash residues, and the decrease of the total basic constituents increases the AFT. The formations of three ash residues during gasification are the interactions among mineral matter and their transformations under high temperature.
Preparation of Shale Oil from Copyrolysis of Oil Shale/plastics Mixtures
Authors: Li Yong , He Jin Gui , Liu Yan Hui
Published: June 2012

Oil shale is a combustible, organic solid rock with high ash content, and is one of the most promising alternative energy sources in the world. Pyrolyzing oil shale can yield a number of petroleum products useful as fuels, and the extraction of oil from oil shale is relatively expensive and uneconomical. The plastics had the synergistic effect to enhance shale oil yields by copyrolysis of oil shale/plastics mixtures. The synergistic effect of polyethylene was more obvious than the poly- propene. The more obvious synergistic effect was, the more obvious shale oil yields increased.
Tropical Grasses Solar Drying Device Design and Research
Authors: Wang Juan , Zhou Han Lin , Wang Dong Jin
Published: June 2012

Abstract. In order to solve the traditional sun dried pastures affected by natural conditions, serious winter pastures reserves shortage problem. It’s affect the development of tropical livestock seriously. With Tropical Research No.2 stylosanthes research for the study, we use Hainan island’s abundant solar radiation to design a solar drying equipment for tropical pastures. The main components of the device are solar collectors, drying tower, air blower, temperature and humidity monitoring systems,a preliminary design for the main components of the equipment, and made a part of the efficiency of the various experimental data and mathematical processing methods.Reseach the different positions of drying tower dry conditions of tropical forage, Reseach the influence of environment temperature and solar radiation, drying medium temperature on the quality of tropical pastures.It can provide technical support for the solar drying of tropical pastures and achieve economies of scale.
Experimental Investigation on Electrostatic Spray Applied in Dyeing and Finishing System
Authors: Zhang Zong Hai , Wang Jun Feng , Yao Jiang , Zhi Liang Ze , Gu Feng
Published: June 2012

In order to reduce energy-consuming and environment pollution of traditional dyeing and finishing industry, a design and experimental method of electrostatic spray system for dyeing and finishing was proposed. With dyeing and finishing solution as experimental fluid, the size of the droplets was measured under different charging voltages. By changing experimental parameters such as fluid amount Q, air pressure and charging voltages U, the relationship between single-side moisture transporting effect and Q, U were analyzed. The research showed the single-side moisture transporting effect became better when Q was from 22L/H to 34L/H. Moreover, electrostatic force Fe was beneficial for single-side moisture transporting effect especially when adding geographic pole at the back of the fabric. A reasonable operation plan which met the dyeing and finishing effect was given，which exceeded traditional dyeing and finishing in efficiency, energy saving and environment protection.
Kinetic and Evolved Gas Analysis of PVC Pyrolysis by TG-MS
Authors: Dong Shao Feng , Yuan Hao Ran , Chen Yong
Published: June 2012

Taking the overlap of two weight loss peaks into consideration and separating them, the multiple-step model of PVC pyrolysis has been analysed by using Coat-Redfern method. It was found that pyrolysis of PVC consisted of three reactions, whose reaction models were all the second order. This method was proved accurate by comparison between simulation and experiment of TG curves. The mass spectrometry of evolved gases agreed well with the TG curves. Obviously, gases such as C6H6, HCl and C2H2 were released during PVC pyrolysis.
KBrO3 Catalyzed Wet Air Oxidation of C.I. Reactive Brilliant Red K-2G
Authors: Dong Xue Wei
Published: June 2012

The effect of KBrO3 on catalytic wet air oxidation to be used in azo dye C.I. Reactive Brilliant Red K-2G decolorization under different conditions is evaluated. The reaction temperature, oxygen partial pressure, pH and catalyst dosage were studied. The optimal conditions of applying KBrO3/O2 system were: reaction temperature 150°C, oxygen partial preSubscript textssure 1.0 Mpa, pH 4 and Reactive Brilliant Red K-2G: KBrO3 (mole ratio) 1:0.5. Under the optimal conditions, the color removal rate was 98.9%. KBrO3/O2 system was efficient in azo dye Reactive Brilliant Red K-2G decolorrization.
Estimation of Polyelectrolyte Phase Volume Based on the Analysis of Acid Dissociation Equilibia of Polyacrylic Acid
Authors: Chai Yu Hong , Liu Jian Guo , Wang Ming Xin
Published: June 2012

The acid dissociation equilibria of typical linear weak acid polyelectrolytes, polyacrylic acid (PAA), were investigated by a potentiometric titration method. The electrostatic effects on the equilibria have been rationalized based on a Gibbs-Donnan concept. The apparent acid dissociation constant of PAA at completely neutralized condition determined by extrapolation are quite close to acid dissociation constant of their monomeric acid. The effective volume and the radius of polyelectrolyte phase of PAA have been calculated experimentally by the non-ideality term of ΔpK values with an iterative procedure. The radiuses increase with increasing at α 0.2 region. It is attributable to the repulsion between negatively charged carboxylate groups is weak at lowly dissociated state, whereas the repulsion is strong in highly dissociated state.
Experimental Study of DO Mass Transfer over Roughened Spillway
Authors: Cheng Xiang Ju , Zhao Wen Qian
Published: June 2012

Spillways or chutes have been used for over 3000 years. Recently, new construction materials and design techniques have increased the interest in spillways and chutes to increase dissolved oxygen concentration in water, especially for contaminated city rivers. A series of laboratory experiments were operated to obtain the efficiency of DO mass transfer over roughened spillway. Two kinds of roughened spillway were considered, i.e., stepped and semi-balled spillways. By means of measuring the DO concentration at the crest and downstream of spillways, the experimental results showed that the more the flow rate is, the less the re-aeration ability of roughened spillway is. Compared with the smooth spillway, stepped spillway has the best reoxygenation effect, followed by the spillway whose bottom is pasted some semi-tennis balls, the worst is the smooth spillway. The results highlight that appropriate artificial roughness on the bottom of spillways or chutes may play an important role to increase dissolved oxygen content and improve water quality.
Evaporation Conditions-Fly Ash Soil Filling with Water Movement of Air Bag Structure Experimental Research
Authors: He Xiao Wen , Xu Guang Quan , Li Qing Qing
Published: June 2012

The movement of aeration zone water is an important part of water cycle in natural. It promotes the precipitation, hydraulic contact of surface water and groundwater. But the change of the structure of vadose zone produce certain effect to its moisture movement, especially on reclaimed land is concerned, moisture in the air bag filling structure with sports have new features. This article through the indoor one dimensional vertical cylindrical tests, and the evaporation conditions with fly ash material 2 structure with water bag gas distribution, probes into the air bag with different profile of the moisture variation characteristics, analyzed the water movement, the mechanism of coal mine reclamation area for the field test, provides the basis.
Kinetic Research of Boron Oxide Reducing Reaction at Low Temperature
Authors: Zhao Ding Guo , Wang Shu Huan , Cui Xiao Jie , Guo Jian Long
Published: June 2012

The reducing process of boron-containing slag at low temperature is an important stage of the direct alloying for smelting boron steel. At low temperature boron slag generates mainly solid - solid reaction in the sintering period. The experiments were done on the carbon tube furnace in laboratory, and the effect of slag reaction in different times at 1200°C was researched. The samples were analyzed by XRD after the reaction. The experimental results shown that the reduction rate increased by increasing reducing time. The chemical reducing reaction of boron oxide by ferrosilicon is second-order reaction at solid state.
Liquid-Phase Hydrogenation to 2, 4-Tolylenediamine over Supported HY Catalysts
Authors: Zhang Xue Mei , Niu Feng Xing
Published: June 2012

We have successfully prepared a novel passivation Ni/HY catalyst by the technologies of macerate-precipitatio.The catalysts are comprised of two contents: HY as carrier, Ni as active component，and we put it into the process of preparating aromatic amines.The nature of the catalysts was discussed based on the characterization results of BET , IR , SEM , XRD , TEM ,TPD , XPS and TPR . The catalytic hydrogenation technology for 2,4-dinitrobenzene in liquid phase can be an attractive and elegant routine for production of 2,4-tolylenediamine. The catalytic activity is evaluated at 2.2 MPa, 90 °C, 750r/min, solvent with reaction materials mass ratio of 60, catalyst with reaction materials mass ratio of 0.1. In the catalytic test, The experimental results over the catalyst showed that 2,4-dinitrobenzene and 2,4-tolylenediamine conversion and selective of 99.88% and 99.16% were obtained respectively.It is found that the catalyst is highly dispersion, stable, and reusable. No obvious deactivation of the catalyst was observed after repeated using twelve times.
Preparation and Swelling Properties of P(AMPS-co-AM)/ Attapulgite Clay Superabsorbent Composite by Microwave Irradiation
Authors: Xu Ji Hong , Tan De Xin , Yan Ling Yan , Li Zhong
Published: June 2012

A novel poly(2-acrylamido-2-methylpropa-nesulfonicacid-co-acrylamide) / attapulgite (P(AMPS-co-AM)/APT) high-salt superabsorbent composite was synthesized through graft polymerization in aqueous solution by microwave irradiation. The structure of the composite was characterized by infrared spectra (FTIR).The influence of the content of monomer, microwave power and the ratio of attapulgite clay on water absorbency was investigated. The swelling behaviors and the water retention of Superabsorbent resin with different APT content were also examined. The results show that the graft copolymerization took place between APT and organic monomers. Adding an appropriate amount of APT in resin can effectively improve the absorption capacity and salt-water performance. Microwave power is 390W, APT amount is 7.5% (mass fraction),The water absorbency of resin in distilled water and 0.9wt% NaCl were 1460g / g and 114 g / g. The resin has a faster absorption rate and strong water retention, the appropriate increase the amount of APT can significantly speed up the rate of the resin absorbent and improve its water retention.
The Design of Urea Dosing Unit in Diesel Engine SCR System
Authors: Wu Qi Dou , Yu Fang Ping , Jin Hua Biao , Mao Yuan Xin
Published: June 2012

The urea dosing unit in the diesel engine SCR system, real-time calculates and delivers the quantitative urea , which is vital to the reduction of the NOx emission. Considering the practical condition, according to the function of the urea dosing unit, based on the pump controlling quantitative and air assisted atomization principle, the mechanical part of dosing unit is designed. Also based on the consideration with versatility and openness of the unit, the control part of dosing unit is designed. At last, based on the the common and open platform founded by designed urea dosing unit, which is composed of mechanical part and control part, the SCR control module and dosing module are developed. At last, the designed dosing unit is examined by the engine ETC test. The ETC test results indicate the design achieves the intended purpose.
The Transformation Mechanism of H2S beside the Water Wall under Reducing Condition
Authors: Yang Jian Guo , Zhang Qing Fu , Yang Yang , Zhao Hong
Published: June 2012

Under reducing conditions, H2S, which will result in the high temperature corrosion of fireside water wall, is predominant sulfur compounds discharged from the coal. Influences of temperature and oxygen on the transformation mechanism of H2S were studied by chemical kinetics. It is concluded from the study that the main productions of H2S vary with the reaction conditions, COS is mainly produced in highly reducing conditions and SO2 is dominant production under oxidizing atmosphere. Peak concentration of S2 only can be obtained at mildly reducing conditions and moderate temperature; meanwhile, most of H2S is oxidized to SO2 when the temperature is above 1300K. A turning point is found when the concentration of O2 is about 2%, and simulation results comply with experimental measurements.
A Brief Analysis of Coal Desulfurization before Combustion
Authors: Cui Guang Wen , Sun Ming Yang , Li Yan Jun , Guo Qi Kai
Published: June 2012

The paper mainly introduces the desulfurization technology before coal combustion and gives a brief analysis of principles , advantages and disadvantages of the three current coal desulfurization technologies: physical desulfurization, chemical desulfurization and biological desulfurization . Finally, this paper puts forward some views on the development trend of coal desulfurization technology.
A Structure of Large Scale WSN Based Safety Monitoring System for Natural Gas Industry
Authors: Wei Yun Kai , Mao Yu Ming , Yu Qin , Li Na
Published: June 2012

With the rapidly development of natural gas production, storage and transportation, the requirement for safety monitoring on natural gas industry are continuously increasing. This paper analyzes the application of WSN (wireless sensor network) in natural gas industry safety monitoring, and proposes a layered structure for large scale WSN based safety monitoring system, which can be used in collecting various kinds of safety information in natural gas industry, and sending them to surveillance center for data analyzing and early warning of abnormal situation. In the structure, we discuss the deployment of sensor nodes, sink nodes and e-sink nodes, and proposed the layered data fusion model and query model.
Desulfurization of Lu,an Coal by Ultrasonic and Microwave
Authors: Mi Jie , Kang Jian
Published: June 2012

In this paper, the desulfurization of LA (Lu,an) coal was carried out by combining the method of ultrasonic and microwave irradiation. The effect of microwave time and combination of ultrasonic and microwave irradiation on the desulfurization of LA coal was investigated. The results showed that the sulfur removal effect of microwave irradiation time is obvious. The removal rate of organic sulfur increased with the microwave irradiation time increased. The effect of ultrasonic before microwave irradiation on desulfurization was greater than simply microwave method. The sulphur form was investigated systematically using X-ray photoelectron spectroscopy (XPS). After microwave and ultrasonic co-enhanced oxidative desulfurization of coal, the content of sulfur in coal was decreased by the XPS analysis.
Fire-Fighting Design of Gasification Station for Liquefied Natural Gas
Authors: Zheng Wei
Published: June 2012

This article refers to the status quo of liquified natural gas (LNG) in China, the anylisis of LNG’s risks, and the discussion of fire-fighting design specifications related to LNG gasification stations at home and abroad. In this text, safety measures are also proposed being aimed at the fire-fighting design of gasification station in the aspects of site selection, overall layout, building structure, safety devices, electric instruments, fire-extinguishers and fire-fighting strategy etc.
Physical Simulation of KR Stirring Desulphurization in Special-Shaped Ladle
Authors: Li Ming Hui , Ouyang De Gang , Zhu Shan He , Luo Wei , Wang Hai Qing
Published: June 2012

According to the theory research results of KR stirring mixing performance, a special-shaped ladle for KR stirring was designed, and the physical simulation experiment on conventional circular and special-shaped hot metal ladles were done. The experiment results indicate that : to the circular ladle, the designed special-shaped ladle significantly improves the mixing performance of KR stirring desulphurization; the operation principle for special-shaped ladle improving desulphurization dynamic condition is that the designed axisymmetric special-shaped section make a certain distance between the stirring vortex flow and the axis of stirrer, which can restrain the concentric rotation and strengthen axial and radial movement of fluid particles in stirring process.
The Application of Deformable Gas Safety Apparatus in Safety Storage, Transportation and Usage of the Volatile Solvents
Authors: Chen Chun Guang , Feng Ya Qing , Chen Xue Xi
Published: June 2012

Volatile solvents are widely used in industrial process, and present in various industrial fields. However, volatile solvents could be potential sources of physical and health hazards. Industry need to get suitable facilities to reduce and prevent hazard risks. The main purpose of this article is to present a new deformable gas safety apparatus, which could be used for safety storage, transportation and usage of volatile solvents. This safety apparatus has been used in actual production and transportation process, and received satisfactory results.
The Study of Drilling Safe Monitoring System Based on Multi Agent Group
Authors: Gao Fei , Zhao Xiong Hu , Liu Hong Shan , Liu Zhi Kun , Yang Jun Zheng
Published: June 2012

Lots of complexity and uncertainties are existed in drilling process. Further more, one of the possible ways to solve on-site drilling safety accidents is the early-warning through real-time monitoring. Based on the analysis of main hazards during drilling process, considering that most of the hazards are observable and controllable, by using multi agent group (MAG) technology of distributed artificial intelligence (DAI), this paper puts forward a functional schematic model with drilling hazards monitoring multi agent group, which includes real-time monitoring agent, feature extraction agent warning analysis agent, communication agent and user interaction agent. Considering the features of drilling engineering hazard monitoring, a distributed drilling safety monitoring system including the two levels, site-level and base-level, is built.
The Calculation of Risk of Hazardous Gaseous Emission of Chemical Tankers Based on Plume Model
Authors: Li Jian Min , Qi Ji , Sun Min , Zheng Zhong Yi
Published: June 2012

To assure the safe transportation of bulk liquid chemicals by tankers at sea, not only it is required internationally that dedicated pressure relieving devices should be installed onboard, but the heights of the pressure reducing valves, the activating pressure are also prescribed numerically, although these are based on experiences gained. Actually, researching the relationship among the wind, including the direction and force, the tanker, including her course and speed, the height of an individual pressure reducing valve is more meaningful to improve the safety of lives and properties at sea. Based on plume model, the relationship above mentioned is researched, and the mathematical relation is also presented in this paper.
Design and Realization of ARM-Based Technological LED Display System
Authors: Huang Xiao Yan , Tie Yong , Li Shu Hua
Published: June 2012

the LED dot matrix is an important public information display terminal and the large screen LED display can be applied in many occasions. This article will introduce a LED display which is based on the ARM technology with S3C4510 as the core in an engineering project. In this system, the main control card module is controlled by the S3C4510. The LED display contains the display module, the control drive circuit, and the main control card module as three parts. It is a decoding system that can process a variety of picture files and video files. CPU will remove the demonstration content from the memory which is stored by the user. Then through the display driver circuit, the demonstration content can be changed into the forms signal which the LED display can accept.
Design of High-Power LED Embeded Controller Based on FSCQ0765RT
Authors: Wang Yi Min , Li Jian Wen
Published: June 2012

This paper designs a type of intelligent switching power supply controller for LED street lamp. The configuration and principle of the controller is detailedly analyzed in this paper. Microprocessor PIC12F675 is employed in the design. With the controller, According to defferent illumination requirements, the controller achieves constant voltage and different constant LED current is automatically regulated to achieve energy saving without LED light intensity decrease notably. The controller is easy to be realized in circuit with high efficiency and high power factor.
Discuss on Building Energy Saving and Energy Saving Materials
Authors: Wang Shi Jin
Published: June 2012

With the design concept of “people-oriented” put forward, the residential comfort requirements which are put forward by people are high increasingly, and building energy consumption increases correspondingly. According to statistics, at present our country building energy consumption accounts for about 30%of total national energy consumption, and which is upward trend. On the other hand, with the building energy consumption increase and large air-conditioning installation, city effect is increasingly serious, and which deteriorated environment. The present situation and development trend of building energy saving method and energy saving materials are discussed in this article.
Energy-Saving Design of Rural Residential Building in Cold Region
Authors: Li Xue Ping , Yan Zeng Feng
Published: June 2012

There are serious energy-saving problems in cold region of rural residential buildings. On one hand, it needs the higher levels energy because of the particular climatic conditions, on the other hand, people in cold regions lack of energy-saving consciousness and technology. Through analyzing the rural residential building status and existing energy-saving problems in cold region of China, the author discussed and summarized the energy-saving design methods of rural residential building in cold region from three aspects, including the energy-saving of residential building size design, the energy-saving of building envelope structure design, and use of renewable energy. The research provides a reference for promoting socialism new rural reconstruction in China.
Evaluation and Selection of Suitable Energy-Storage Materials for Northern Heating and Cooling Supplied Solar Buildings in China Based on Fuzzy Math Method
Authors: Ao Yong`an , Li Yu Wen , Zhang Qian , Che Dan , Peng Liang
Published: June 2012

The aim of the study is to evaluate and select suitable phase change materials (PCMs) for northern heating-cooling supplied (heating in winter and cooling in summer) solar buildings in China. Fuzzy mathematic comprehensive analysis method was used in the process. And there are many impact factors involved in the process also. In the paper we only considered phase-transition temperature, phase-transition latent heat, coefficient of thermal conductivity, density, phase-transition temperature region, material price and safety. And some thermal performances of materials were attained by experimental measurement in the study. Finally we got the fuzzy comprehensive evaluation results of 7 selected low-temperature materials including dodecanol, heptadecane, octadecane, decanoic acid, dual composite PCM decanoic acid- palmitic acid (DA-PA), decanoic acid-lauric acid (DA-LA), and polyethylene glycol 600 (PEG600). The conclusion is that the value of comprehensive performance index of dodecanol is the biggest, 0.832, in seven PCMs. Therefore, the dodecanol is the most suitable PCM for northern heating-cooling supplied solar buildings in China.
Research on the New Technique of Material Temperature Prediction and Energy-Saving Control in Airport Winter Construction
Authors: Liu Yan , Gao Zhi Bin , Zhang Wen
Published: June 2012

The technique of energy saving in airport winter construction is always the key and difficult point in the field of airport construction. Considering the feature of airport winter construction, this paper develops the material temperature predicting and energy-saving control technique and its specialist-aided system in order to reduce energy consumption on airport jobsite. This technique can predict the changing temperature trend after concrete material pouring and the changing maturity level of concrete, according to the key parameter information that contractors provide. Giving the results the preceding data, it can provide the optimal curing method, thermal insulation and construction technology. And contractors can easily meet the requirement of high strength of structural material while consume energy and resource at a minimum level. This technique helps contractors find optimal solutions to save energy and resources in airport winter construction and avoid the unnecessary energy consumption.
Green Low Carbon Design in the Application of Energy-Saving Building
Authors: Lin Nan , Liu Fei
Published: June 2012

The article from the energy and environment issues, elaborates the need for the development of energy-saving building, describes the characteristics and advantages of green energy-saving buildings. For the problem of high energy consumption in buildings, analyses the application of green building materials in the building envelope, from environmental protection material, renewable energy and the overall system design aspects discusses the low carbon energy- saving design, summarizes the significance of the building energy efficiency evaluation and energy consumption assessment, concludes and looks forward to the prospect of the development of green energy conservation construction.
Synthesis of Rare Earth Up-Conversion Material and Application in the Dye-Sensitized Solar Cells
Authors: Zhang Jun , Qu Ying Hong , Zhang Feng Xiang , Peng Xiang Da , Qian Si Yu , Li Le Kai
Published: June 2012

Er3+ ,Yb3+ :Y2O3 nanocrystal up-conversion material has been prepared using the sodium carbonate precursor method and doped in the P25 to prepare up-conversion nano-TiO2 powder. The micromorphology, structure and particle size of the up-converting nanoparticles were characterized by atom force microscopy (AFM) and X-ray diffraction (XRD). Nano-TiO2 powder with up-conversion performance was applied to Dye-sensitized solar cells, the photoelectric conversion efficiency of the DSSC with up-conversion material is twice the photoelectric conversion efficiency of normal DSSC irradiated by infrared light.
Performance Research on Carbon Fibre-Slag Electrically Conductive Concrete
Authors: Lu Zhao Hong , Fu Han Lian
Published: June 2012

Abstract. The carbon fiber-slag conductive concrete is prepared in carbon fiber and slag elementary material of function. Under the conditions of a certain amount of Carbon fiber, research has been carried out in different slag content. The electric mechanical effects of Imposing loads has been carried out. The results indicated that: slag can improve compression capacity. And the compression capacity can be reduced by adding some steel slag while adding some amount. Carbon fibre-slag concrete can be used as self-monitoring materials fracture by the electric mechanical effects
Research on Application and Extension of CL System Based on the Low-Carbon Energy Efficient Building Materials
Authors: Wang Dong Li , Li Tong , Yang Gui Fang
Published: June 2012

Qinhuangdao and national other places are the same, the construction energy conservation situation is stern, develops the construction to conserve energy imminently vigorously. Displays the area superiority, promotes the CL structure, to fundamentally does well the construction energy conservation work, to promote the Qinhuangdao urbanization advancement to be imperative. This article through the investigation and study to the Qinhuangdao CL structure Production enterprise, introduced that the energy conservation characteristic of the CL structure, founded the the question which existed in the promotion of the CL structure, searched after the countermeasure exploration speeds up the CL structure promotion work.
Research on Method of Building Energy Conservation Based on Infrared Imaging Measurement
Authors: Shen Xiao Mei , Xu Ju Wu
Published: June 2012

With the deepening of the energy conservation of the building, energy saving from the original design of building energy-saving gradually turned to the field detection and completion acceptance, which requires a corresponding energy-efficient means of detection. With the development of infrared technology, the combination of infrared technology and detection methods of building energy-saving, to further promote the development of building energy efficiency testing work. Compared to the traditional heat flow meter or hot-box method, infrared thermal imaging method has no effect on the measured object, detecting the surface temperature of quick reaction speed, accompanying with wide temperature range and high precision, is widely used in various fields of testing work, which has been particularly prominent in the thermal defect detection. In this paper, the method of infrared thermography is used to confirm whether the thermal defects exist in energy-saving construction or not. Testing results show that infrared thermography can accurately reflect the temperature distribution of building wall surface. Infrared thermal imaging to detect the building surface's energy efficiency, which is providing efficient and accurate means of detection for the evaluation of the building energy efficiency. This is to help carry out a comprehensive building energy-saving testing.
Fatigue Property Analysis of Modified Asphalt Emulsion-Cement Cold Recycling Mixtures
Authors: Guo Yin Tao , Liu Zhen Qing , Liu Qing Quan
Published: June 2012

The fatigue property of rectangular section beam for semi-flexible cold recycling mixtures has been analyzed basing on damage-fracture mechanics principles. Fatigue models of rectangular section beam have been put forward respectively, which includes both macroscopic cracks appearance and propagation process. Then parameters for fatigue models have been determined by the standard test for determining fatigue failure of compacted asphalt concrete subjected to repeated flexural bending. Finally, a fatigue life estimate formula of rectangular section beam is proposed by using mathematical decoupling method. Results indicate that the fatigue damage process play an important role in the whole fatigue process. Also, damage-fracture mechanics principles and methods are suitable for estimating the fatigue property of modified asphalt emulsion-cement cold recycling mixtures, which has a definite guiding purpose for projects.