Patent Publication Number: US-2022234022-A1

Title: Reaction apparatus

Description:
TECHNICAL FIELD 
     The present application belongs to the technical field of chemical production equipment, and specifically relates to a reaction apparatus. 
     BACKGROUND 
     At present, the use of reaction devices is very common in the synthesis and preparation of chemical products. 
     Chinese patent application CN204768663U discloses a reaction kettle, which comprises a kettle body, a pipeline assembly, a circulating pump, a feeding hopper and a valve assembly. The two ends of the kettle body are respectively provided with an upper head and a lower head. Both the feeding end and the discharging end of the circulating pump are communicated with a flow delivery pipe. The feeding hopper is communicated with the flow delivery pipe, and the feeding hopper is used for feeding the reaction raw materials, and then the reaction raw materials can be transported from the feeding hopper to the kettle body through the flow delivery pipe, a branch pipe, a flow guide pipe and an overflow pipe. The feeding hopper can be installed on the floor of a plant or on an external bracket, and can also be adjusted and installed according to the practical situation. 
     The valve assembly comprises a discharging valve, a feeding valve and a circulation valve. The discharging valve is arranged on the flow delivery pipe, and the first end of the discharging valve is communicated with the lower head. The feeding valve is arranged in the flow delivery pipe, and the first end of the feeding valve is communicated with the feeding hopper, and the second end of the feeding valve is respectively communicated with the second end of the discharging valve and the feeding end of the circulator pump. The circulation valve is arranged in the flow delivery pipe, and the first end of the circulation valve is communicated with the discharge end of the circulator pump, and the second end of the circulation valve is communicated with the upper head. 
     When the reaction materials need to be fed into the kettle body, firstly, the discharge valve is closed, the feeding valve and the circulation valve are opened, and the circulation pump is controlled to work normally; then the reaction materials are fed into the feeding hopper, and then fed into the kettle body from the feeding hopper through the circulator pump. When feeding is completed, firstly, the feeding valve is closed, and the discharge valve is opened. The reaction raw materials can be conveyed from the bottom of the kettle body to the top of the kettle body through the circulator pump, thus achieving an effect of the mixing the raw materials during the process of circulating transportation, so that the process steps of circulating and feeding can be realized through a circulator pump and a plurality of control valves. 
     However, the above-mentioned reaction kettle still has the following defects: 1. the method of feeding at the top of the kettle requires a circulating pump to draw the materials from the bottom to the top of the kettle, and the energy consumption of pump total head generated in the process is large. 2. If the raw material is a solid-liquid mixture or a viscous liquid, a wall build-up on the flow guide pipe will occur during the feeding process, and the overflow pipe may be blocked. 
     SUMMARY 
     Therefore, the technical problem to be solved by the present application is to overcome the above-mentioned defects in the prior art, thereby providing a reaction apparatus. 
     For this purpose, the present application adopts the following technical solutions: 
     A reaction apparatus, comprising: a reaction kettle;
         a circulation loop, comprising a circulation pipeline and a circulator pump provided on the circulation pipeline, a discharging end of the circulator pump being communicated with the top of the reaction kettle by means of a circulation valve, and a charging end of the circulator pump being communicated with the bottom of the reaction kettle by means of a block valve;   a feeding loop, comprising a feeding pipeline and a bypass pipeline, the feeding pipeline being provided between the block valve and the circulator pump and being communicated with the circulation pipeline, the bypass pipeline being provided with a control valve, and one end of the bypass pipeline being communicated with the discharging end of the circulator pump and the other end thereof being communicated with the bottom of the reaction kettle; and   a discharging loop, comprising a discharging pipeline provided between the circulator pump and the circulation valve and communicated with the circulation pipeline, the discharging pipeline being provided with a discharging valve.       

     Preferably, the discharging pipeline is located at a position higher than that of the bypass pipeline. 
     Preferably, a bi-directional flow valve is provided at the bottom of the reaction kettle. 
     Preferably, the feeding pipeline is communicated with a feedstock container. 
     Preferably, the discharging pipeline is communicated with a storage tank. 
     Preferably, a vacuum pump is provided on an upper part of the reaction kettle. 
     Preferably, a stirring paddle is provided inside the reaction kettle. 
     Preferably, a driving device for driving the stirring blade is provided on the top of the reaction kettle. 
     Feeding can be achieved by closing the block valve, the discharging valve and the circulation valve, opening the feeding valve and the bi-directional flow valve, and then adjusting the control valve and the circulation pump. 
     Circulation can be achieved by closing the discharging valve, the feeding valve and the control valve, and opening the bi-directional flow valve, the circulation valve, the block valve and circulation pump. 
     Discharging can be achieved by closing the circulation valve, the feeding valve and the control valve, and opening the bi-directional flow valve, the discharging valve, the block valve and the circulation pump. 
     Compared with the prior art, the present application has the following advantages: 
     1. The reaction apparatus provided by the present application realizes the feeding at the bottom of the kettle by providing a bypass pipeline, a feeding pipeline and corresponding control valve and feeding valve, which not only overcomes the energy consumption of pump total head generated during the process of feeding materials from the bottom to the top of the kettle through a circulation pump, but also avoids the phenomena that wall build-up on the flow guide pipe and blocking of the overflow pipe occurred when the raw material is a solid-liquid mixture or a viscous liquid. By providing a bypass pipeline, a feeding pipeline, discharging pipeline and the corresponding valves, the present application can realize process steps of feeding, circulation and discharging by only switching the valve switch of a same circulating pump. The operation is simple and convenient, which greatly improves the production efficiency, promotes the operational requirements of production standardization, and makes production more standardized and efficient. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
       In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, a brief introduction will be given below on the accompanying drawings required to be used in the specific embodiments. Apparently, the accompanying drawings described below are some embodiments of the present application. For those skilled in the art, other accompanying drawings can be obtained based on these accompanying drawings without any creative effort. 
         FIG. 1  is a schematic structural diagram of a reaction apparatus provided in the first embodiment of the present application; 
         FIG. 2  is a schematic structural diagram of an improved reaction apparatus provided in the first embodiment of the present application; 
     
    
    
     REFERENCE NUMBERS 
       1 —reaction kettle;  2 —circulation pipeline;  3 —circulation valve;  4 —circulator pump;  5 —bypass pipeline;  6 —control valve;  7 —feeding pipeline;  8 —feeding valve;  9 —block valve;  10 —discharging pipeline;  11 —discharging valve;  12 —bi-directional flow valve;  13 —feedstock container;  14 —storage tank;  15 —vacuum pump;  16 —driving device; and  17 —stirring paddle. 
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     The technical solutions of the present application will be described more clearly and fully hereinafter with reference to the accompanying drawings. The described embodiments are part of the embodiments of the application and not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by one of ordinary skill in the art without creative work are within the scope of protection of the present application. 
     In the description of the application, unless otherwise specified, it should be understood that the terms “communicated”, “connected” are to be construed broadly, for example, may be a fixed connection, a detachable connection or an integrated connection; may be mechanical connection or electrical connection; may be direct connection, may also be indirect connection by an intermediate medium, or may be in communication with the interior of two elements. The specific meanings of the above-mentioned terms in the present application can be understood by one of ordinary skill in the art. 
     In addition, the technical features involved in the various embodiments of the application described below can be combined with each other as long as there is no conflict between each other. 
     Embodiment 1 
     As shown in  FIG. 1 , an embodiment of a reaction apparatus comprises: a reaction kettle  1 ;
         a circulation loop, comprising a circulation pipeline  2  and a circulator pump  4  provided on the circulation pipeline  2 , a discharging end of the circulator pump  4  being communicated with the top of the reaction kettle  1  by means of a circulation valve  3 , and a charging end of the circulator pump  4  being communicated with the bottom of the reaction kettle  1  by means of a block valve  9 ;   a feeding loop, comprising a feeding pipeline  7  and a bypass pipeline  5 , the feeding pipeline  7  being provided between the block valve  9  and the circulator pump  4  and being communicated with the circulation pipeline  2 , the bypass pipeline  5  being provided with a control valve  6 , and one end of the bypass pipeline  5  being communicated with the discharging end of the circulator pump  4  and the other end thereof being communicated with the bottom of the reaction kettle  1 ; and   a discharging loop, comprising a discharging pipeline  10  provided between the circulator pump  4  and the circulation valve  3  and communicated with the circulation pipeline  2 , the discharging pipeline  10  being provided with a discharging valve  11 .       

     The discharging pipeline  10  is located at a position higher than that of the bypass pipeline  5 . 
     The feeding pipeline  7  is communicated with a feedstock container  13 . 
     The discharging pipeline  10  is communicated with a storage tank  14 . 
     A vacuum pump  15  is provided on an upper part of the reaction kettle  1 . 
     A stirring paddle  17  is provided inside the reaction kettle  1 . A driving device  16  for driving the stirring blade  17  is provided on the top of the reaction kettle  1 . 
     In the above-mentioned reaction kettle  1 , feeding at the bottom of the kettle is achieved by providing a bypass pipeline  5 , a feeding pipeline  7  and corresponding control valve  6  and feeding valve  8 . Compared with the prior art, it overcomes the pump total head generated during the process of feeding materials from the bottom to the top of the kettle through a circulation pump  4 , thus reducing the energy consumption. By using the above-mentioned reactor  1 , feeding can be achieved by closing the block valve  9 , the discharging valve  11  and the circulation valve  3 , opening the feeding valve  8 , and then adjusting the control valve  6  and the circulation pump  4 . Circulation can be achieved by closing the discharging valve  11 , the feeding valve  8  and the control valve  6 , and opening the circulation valve  3 , the block valve  9  and the circulation pump  4 . Discharging can be achieved by closing the circulation valve  3 , the feeding valve  8  and the control valve  6 , and opening the discharging valve  11 , the block valve  9  and the circulation pump  4 . That is, the process steps of feeding, circulation and discharging can be realized by only switching the valve switch of a same circulating pump, so the operation is simple. 
     As an improved embodiment, as shown in  FIG. 2 , a bi-directional flow valve  12  is provided on the circulation pipeline  2  between the bottom of the reaction kettle  1  and the bypass pipeline  5 . When feeding, the materials can flow into the kettle from the bottom of the kettle; when circulating and discharging, the materials can flow out of the kettle from inside of the kettle, so that the flow direction of the materials is not limited. 
     The feeding pipeline  7  is communicated with a feedstock container  13 , and feedstock container  13  is selected from the group consisting of a storage tank, an IBC tank, or an iron tank, which is fixed or unfixed. When feeding materials, the labor cost can be saved and the production efficiency can be improved. 
     The discharging pipeline  10  is communicated with a storage tank  14 , and storage tank  14  is selected from the group consisting of a storage tank, an IBC tank, or an iron tank, which is fixed or unfixed. The product can be quickly poured into a next reaction kettle or a container that can contain the product through the circulating pump, thereby improving the production efficiency. 
     A vacuum pump  15  is provided on an upper part of the reaction kettle  1 . When air in the reaction needs to be replaced, the vacuum pump  15  can be started to replace air in the reactor  1 . 
     A stirring paddle  17  is provided inside the reaction kettle  1 , and a driving device  16  for driving the stirring blade  17  is provided on the top of the reaction kettle  1 . After feeding is completed, the driving device  16  is started, and the stirring paddle  17  starts to stir the materials in the reaction kettle  1 , so that the materials are fully mixed. 
     Apparently, the aforementioned embodiments are merely examples illustrated for clearly describing the present application, rather than limiting the implementation ways thereof. For those skilled in the art, various changes and modifications in other different forms can be made on the basis of the aforementioned description. It is unnecessary and impossible to exhaustively list all the implementation ways herein. However, any obvious changes or modifications derived from the aforementioned description are intended to be embraced within the protection scope of the present application.