APPARATUS FOR TREATING EXHAUSTED HEATING GAS

Abstract: The present invention relates to an apparatus for treating exhausted heating gas. The conventional art has a disadvantage in that reuse of exhausted gas is impossible because of lack of an apparatus to recover exhausted gas, and temperature difference between the inside and the outside of a processing chamber causes air condensation in an inlet and an outlet of the processing chamber, thereby causing condensation water to contact processing materials and poor processing. Further, the conventional art has a disadvantage in that it takes quite some time to preheat fresh air flowed into an inlet and outlet of a processing chamber, thus causing difficulty, inefficiency, and inconvenience, and wastes energy to preheat flowed fresh air. The present invention provides an apparatus for treating exhausted heating gas, comprising: a first heat-recovery part (2), wherein exhausted gas in a processing chamber (1) having an inlet (11) and an outlet (12) is sent by the operation of a blower a (14) to an exhaust duct (13) comprising a first heat exchanger (21) having an absorption port (21a) and an exhaust port (13), and said exhaust port (21b) having a blower b (22) is connected a delivery duct (23) connected to a processing chamber (1); a second heat-recovery part (3), wherein a second heat exchanger (31) having an absorption port (31a) and a draining port (31b) is positioned on an exhaust duct (13) of said processing chamber (1), and a pump a (32) is positioned on said absorption port (31a); a temperature control part (4), wherein a third heat exchanger (41) is positioned on an absorption port (21a) of said first heat exchanger (21), an absorption port (41a) and an exhaust port (41b) of said third heat exchanger (41) are connected to a draining port (31b) of a second heat exchange (31), a valve a (42) and a valve b (43) are positioned between them and an absorption port (41a) of a third heat exchange (41), a temperature sensor (44) is positioned on an exhaust port (21b) of a first heat exchanger (21), and a said valve a (42), said valve b (43), and a temperature sensor (44) are connected; and a wet-purifying part (5), wherein an absorption duct (51) connected to an exhaust duct (13) of a processing chamber (1) is positioned on one side of a purifying main body (50), whose upper part is divided and lower part contains detergent, the exhaust duct (13) having a blower c (55) is positioned on the other side thereof, and a draining pipe a (54) having a drain valve (53) is formed on the lower part thereof, thereby reusing exhausted heat and saving energy. Further, the present invention prevents air condensation in an inlet and an outlet, thus reducing poor processing caused by contact of condensation water to processing materials, as opposed to a conventional device. Cooling and condensation of contaminants in a first heat exchanger and a second heat exchanger, and purification of the detergent by a wet-purifying part enhances efficiency of purifying exhausted heat, thus preventing environmental contamination. Further, as recovered heat can be used for preheating fresh air flowed inside, the present invention can save energy and reduce processing hours, thereby enhancing efficiency and productivity of processing.

Description: APPARATUS FOR TREATING EXHAUSTED HEATING GAS Technical Field The present invention relates to an apparatus for treating exhausted heating gas, and more particularly to an apparatus for treating exhausted heating gas, which recovers and reuses exhausted heat for various purpose, such as to provide hot water, and enhances efficiency of purifying contaminants in gas . Background Art Fig. 4 is a circuit diagram of a conventional process of treating exhausted heating gas, wherein a processing chamber (100) comprises an inlet (101) and an outlet (102) and processing materials are heated and processed in the processing chamber (100) . An exhaust duct (Ilia) is positioned on the processing chamber (100) to absorb high-temperature exhausted gas from the processing chamber (100) by the operation of a blower (104), and the exhaust duct (Ilia) is connected to an exhausted gas treating apparatus (110) to collect exhausted gas, thereby separating contaminants in the exhausted gas . The exhausted gas treating apparatus (110) comprises a cyclone-shaped wet-scrubber main body (111), a detergent- injection nozzle (115 being positioned on the upper inside of the wet-scrubber main body (111) for injecting detergent, a mist filter (116) being position thereon. The detergent- injection nozzle (113 is connected to a detergent-storage tank (112) and an absorption duct (113), and a pump (113a) is formed on an absorption duct (113) so that detergent in the detergent-storage tank (112) can be provided to the detergent- injection nozzle (115) oy the operation of the pump (113a). A gas releaser (114) is connected to the upper part of the wet-scrubber main body (111) and the blower (111b) is formed on the gas releaser (114) so that gas in the wet- scrubber main body '111) can be discharged from the gas releaser (114) by the operation of the blower (111b), and a draining pipe (112b) on the lower side of the wet-scrubber main body (111) is connected to a detergent-storage tank (112) . According to such a conventional device, high-temperature exhausted gas in the processing chamber (100) is sent to the exhaust duct (Ilia) by the operation of the blower (104) and then discharged into a wet-scrubber main body (111). The exhausted gas discharged into the wet-scrubber main body (111) is separated into gas and contaminants by detergent injected from the detergent-in ection nozzle (115). The separated gas flows into the mist filter (116) and then the gas releaser (114) to be discharged, while contaminants are sent to a detergent-storage tank (112) for storage through a draining pipe (112b) connected to the lower part of the inlet (111) . The stored wastewater is delivered into and stored m a tank car (117) through the draining pipe (112b) of the detergent- storage tank (112) having the drain valve (112a). However, according to the conventional device as illustrated m Fig. 5, because of temperature difference between high-temperature air inside the processing chamber (100) and low-temperature air outside, air m the inlet (101) and the outlet (102) of the processing chamber (100) is condensed, and contact of the condensed water to processing materials causes poor processing. The conventional art has a disadvantage in that preheating for producing processing materials takes much time, thus causing inconvenience, inefficiency, and low productivity. The conventional art is less economical because energy consumption for preheating increases producing costs and exhausted heat is impossible to reuse. Disclosure of the Invention Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to reuse exhausted heat and enhance efficiency of purifying contaminants in exhausted gas. Another object of the present invention is to prevent air condensation in an inlet and an outlet of a processing chamber. Another object of the present invention is to reduce time for preheating fresh air flowed into a processing chamber. To accomplish these object, the present invention provides an apparatus for treating exhausted heating gas, comprising: a first heat-recovery part, wherein exhausted gas in a processing chamber having an inlet and an outlet is sent by the operation of a blower a to an exhaust duct comprising a first heat exchanger having an absorption port and an exhaust port, and said exhaust port having a blower b is connected to a delivery duct connected to a processing chamber; a second heat-recovery part, wherein a second heat exchanger having an absorption port and a draining port is positioned on an exhaust port of said processing chamber, and a pump a is positioned on said absorption port; a temperature control part, wherein a third heat exchanger is positioned on an absorption port of said first heat exchanger, an absorption port and an exhaust port of said third heat exchanger are connected to a draining port of a second heat exchanger, a valve a and a valve b are positioned between them and an absorption port of a third heat exchanger, a temperature sensor is positioned on an exhaust port of a first heat exchanger, and said valve a, said valve b, and a temperature sensor are connected; and a wet-purifying part, wherein an absorption duct connected to an exhaust duct of a processing chamber is positioned on one side of a purifying main body, whose upper part is divided and lower part contains detergent, the exhaust duct having a blower c is positioned on the other side thereof, and a draining pipe a having a drain valve is formed on the lower part thereof. Further, the present invention provides an apparatus for treating exhausted heating gas, wherein a main feed pipe having a pump b is connected to the lower part of said purifying main body, said main feed pipe is connected to a first sub feed pipe and a second sub feed pipe, which are positioned toward a first heat exchanger and a second heat exchanger and have a valve c and a valve d, a first injection nozzle and a second injection nozzle are positioned at the ends of said first sub feed pipe and said second sub feed pipe, a first collecting tank having a first releaser and a second collecting tank having a second releaser are positioned on the lower parts thereof, said first releaser and said second releaser are connected to a cyclone having a draining pipe comprising a pump c, and a draining pipe b of said pump c and a draining pipe a of a purifying main body comprise a cleaning part connected to a storage tank. Brief Description of the Drawings Figure 1 is a circuit diagram showing an overall structure of the present invention. Figure 2 is a cross-sectional view of a processing chamber according to the present invention. Figure 3 is a circuit diagram showing an embodiment of the present invention. Figure 4 is a circuit diagram showing a conventional process of treating exhausted heating gas. Figure 5 is a cross-sectional view of a conventional processing chamber for treating exhausted heating gas. Reference Numerals 1 processing chamber 11 inlet 12 outlet 13 exhaust duct 14 blower a 2 first heat-recovery part 21 first heat exchanger 21a absorption port 21b exhaust port 22 blower b 23 delivery duct 3 second heat-recovery part 31 second heat exchanger 31a absorption port 31b draining port 32 pump a 4 temperature control part 41 third heat exchanger 41a absorption port 41b exhaust port 42 valve a 43 valve b 44 temperature sensor 45 controller 5 wet-purifying part 50 purifying main body 51 absorption duct 52 exhaust duct 53 drain valve 54 draining pipe a 55 blower c 6 cleaning part 61 main feed pipe 61a pump b 62 first sub feed pipe 62a valve c 63 second sub feed pipe 63a valve d 64 first injection nozzle 65 second injection nozzle 66 first collecting tank 66a first releaser 67 second collecting tank 67a second releaser 68 cyclone 68a draining pipe b 68b pump c 69 storage tank 69a valve e 69b draining pipe c 70 tank car Best Mode for Carrying out the Invention A detailed description will hereinafter be given of the present invention, with reference to the drawings and a specific embodiment. Fig. 1 is a circuit diagram showing an overall structure of the present invention. As seen in Fig.l, the present invention comprises a processing chamber (1) having an inlet (11) and an outlet (12), the inlet (11) and the outlet (12) of the processing chamber (1) and an exhaust duct (13) connected to the inside being formed on the upper part of the processing chamber (1) , wherein processing materials are heated or processed in the processing chamber (1) . The exhaust duct (13) of the processing chamber (1) comprises a first heat-recovery part (2) to recover exhausted heat in high-temperature exhausted gas from the exhaust duct (13), the first heat-recovery part (2) comprising a first heat exchanger (21) having an absorption port (21a) and an exhaust port (21b) on the exhaust duct (13) having a blower a (14), and an exhaust port (21b) of the first heat exchanger (21) comprising a blower b (22) . To re-send air whose heat is exchanged in a first heat exchanger (21) to the processing chamber (1), the inlet (11) and the outlet (12), a delivery duct (23) is formed on the upper part of the processing chamber (1) and the delivery duct (23) and the exhaust port (21b) of the first heat exchanger (21) are connected. A second heat-recovery part (3) together with the first heat-recovery part (2) is formed on the exhaust duct (13) of the processing chamber (1) , the second heat-recovery part (3) , like the first heat-recovery parr (2) , comprising a second heat exchanger (31) having an absorption port (31a) and a draining port (31b) on the exhaust duct (13), and a pump a (32) being positioned on an absorption port (31a) of the second heat exchanger (31) . Further, a temperature control part (4) is positioned between the first heat exchanger (21) and the second heat exchanger (31) in order to control a temperature of the air which is re-sent to the processing chamber (1) from a delivery duct (23) after its heat is exchanged in the first heat exchanger (21) . The temperature control part (4) comprises a third heat exchanger (41) having an absorption port (41a) and an exhaust port (41b) on an absorption port (21a) of a first heat exchanger (21), the absorption port (41a) and the exhaust port (41b) of the third heat exchanger (41) being connected to a draining port (31b) of a second heat exchanger (31) . For opening and closing, a valve a (42) is positioned on a draining port (31b) of a second heat exchanger (31) between the draining port (41a) and the exhaust port (41b) of the third heat exchanger (41), and a valve b (43), likewise, is positioned on the draining- port (41a) of the third heat exchanger (41) . To sense a temperature of the air which is heat-exchanged and sent through the delivery duct (23) to the processing chamber (1), an exhaust port (21b) of the first heat exchanger (21) comprises a temperature sensor (44), a valve a (42) and a valve b (43), together with the temperature sensor (44), being connected to a controller (45). In order to remove contaminants in exhausted gas released from the exhaust duct (13) of the processing chamber (1) , a wet-purifying part (5) is provided at the end of the exhaust duct (52), the wet-purifying part (5) comprising an empty purifying main body (50), the purifying main body (50) having an absorption duct (51) for absorbing exhausted gas on one side and an exhaust duct (13) for releasing gas purified therefrom. The exhaust duct (52) comprises a blower (55) , detergent is contained in the divided purifying main body (50), and a draining pipe a (54) having a drain valve (53) is positioned in the lower part of the purifying main body (50) for drainin . The process and features of the invention will now be described in more detail. First, high-temperature exhausted gas in the processing chamber (1) is absorbed into the exhaust duct (13) by the operation of the blower (14) formed on the exhaust duct (13). Then, the absorbed high-temperature gas is cooled while flowing through the exhaust duct (13) by a first heat-recovery part (2) and a second heat-recovery part (3) . In this process, heat is exchanged, and cooling and condensation of the air occur simultaneously, thus removing contaminants in the exhausted gas for the first time. After flowing through the first heat-recovery part (2) and the second heat-recovery part (3) , the exhausted gas is cleaned by a wet-puπfymg part (5) to totally remove residual contaminants, thereby releasing pure gas without contaminants from the exhaust duct (13) of a purifying ma body (50) . Fresh air is absorbed to the first heat-recovery part (2) through an absorption port (21a) of a first heat exchanger (21) by the operation of a blower b (22), heat-exchanged with high-temperature exhausted gas of the exhaust duct (13) while flowing through the first heat exchanger (21) , released from an exhaust port (21b), and then re-sent to the inlet (11) and the (12) of the processing chamber (1) through the delivery duct (23) , thereby exchanging the fresh air flowed into the processing chamber (1) for heated fresh air, and preheating processing materials. As a result, as seen in Fig. 2, air condensation m the inlet (11) and the outlet (12) of the processing chamber (1), more specifically, air condensation the inlet (11) and the outlet (12) which is caused by temperature difference between high-temperature air inside the processing chamber (1) and low-temperature air outside can be prevented. Fig. 3 is a circuit diagram showing an embodiment of the present invention. As seen in Fig. 3, a cleaning part (6) is provided to clean the first heat exchanger (21) of the first heat-recovery part (2) and the second heat exchanger (31) of the second heat-recovery part (3), the cleaning part (6) comprising a main feed pipe (61) having a pump b (61a) in the purifying main body (50), the main feed pipe (61) comprising a first sub feed pipe (62) and a second sub feed pipe (63) toward a first heat exchanger (21) and a second heat exchanger (31), and the first sub feed pipe (62) and the second sub feed pipe (63) comprising a valve c (62a) and a valve d (63a) for opening and closing thereof. A first injection nozzle (64) and a second injection nozzle (65) are positioned at the ends of the first sub feed pipe (62) and the second sub feed pipe (63) so that detergent provided from the main feed pipe (61), the first sub feed pipe (62), and the second sub feed pipe (63) can be injected to the first heat exchanger (21) and the second heat exchanger (31) . In order to collect the injected detergent, a first collecting tank (66) and a second collecting tank (67) are positioned on the lower parts of the first injection nozzle (64) and the second injection nozzle (65), the first collecting tank (66) and second collecting tank (67) comprising a first releaser (66a) and a second releaser (67a) respectively, and a cyclone (68) being positioned to separately dispose contaminants drained from the first releaser (66a) and the second releaser (67a). The cyclone (68) is connected to a storage tank (69) through a draining pipe b (68a) having a pump c (68b), the draining pipe a (54) of the purifying main body (50) being connected to the storage tank (69), together with the cyclone (68) and the draining pipe (68a), a draining pipe c (69b) having a valve e (69a) being positioned on the lower part of the storage tank (69), thereby separately disposing wastewater to a tank car. According to the present invention, with the valve c (62a) of a first sub feed pipe (62) and the valve d (63a) of the second sub feed pipe (63) open, detergent in the purifying main body (50) of the cleaning part (6) is provided through a main feed pipe (61) by the operation of a pump b (61a), then sent to the first sub feed pipe (62) and the second sub feed pipe (63), and injected from the first injection nozzle (64) and the second injection nozzle (65) formed at the ends of the first sub feed pipe (62) and the second sub feed pipe (63), thereby cleaning the first heat exchanger (21) and the second heat exchanger (31) . The injected detergent is collected inside the first collecting tank (66) and the second collecting tank (67) positioned on the lower parts of the first injection nozzle (64) and the second injection nozzle (65), then sent to the cyclone (68) through the first releaser (66a) and the second releaser (67a) connected to the first collecting tank (66) and second water-collecting tank (67), and separated from contaminants in the cyclone (68). The detergent released from the draining pipe (68a) of the cyclone (68) is collected and stored in a storage tank (69) , and then sent to a tank car (70) through a draining pipe c (69b) positioned on the lower part of the storage tank (69) for treatment. Industrial Applicability As apparent from the above description, the present invention enhances energy efficiency and productivity and saves energy by recovering exhausted heat to heat fresh air flowed into a processing chamber during a processing procedure or to preheat processing materials, thus providing hot water or warming. Further, the present invention prevents air condensation caused by temperature difference between air inside a processing chamber and fresh air outside, thus reducing inferior processing caused by contact to processing materials in condensed water as in a conventional device. The present invention has an advantage in that high- temperature exhausted gas flows through a first heat exchanger and a second heat exchanger while contaminants therein can be removed by cooling and condensation, and then contaminants in the exhausted gas is totally removed in a cleaning part for releasing, thus enhancing efficiency of purifying contaminants in contaminated exhausted gas and preventing environmental contamination from exhausted gas. The present invention has a further advantage in that it uses recovered exhausted heat for preheating processing materials flowed into a processing chamber or for providing heated fresh air, thus saving energy, reducing inconvenience in a processing procedure, and enhancing efficiency and productivity .

Claims: Claims : 1. An apparatus for treating exhausted heating gas, comprising: a first heat-recovery part (2), wherein exhausted gas in a processing chamber (1) having an inlet (11) and an outlet (12) is sent by the operation of a blower a (14) to an exhaust duct (13) comprising a first heat exchanger (21) having an absorption port (21a) and an exhaust port (13) , and said exhaust port (21b) having a blower b (22) is connected to a delivery duct (23) connected to a processing chamber (1) ; a second heat-recovery part (3) , wherein a second heat exchanger (31) having an absorption port (31a) and a draining port (31b) is positioned on an exhaust port (13) of said processing chamber (1) , and a pump a (32) is positioned on said absorption port (31a) ; a temperature control part (4), wherein a third heat exchanger (41) is positioned on an absorption port (21a) of said first heat exchanger (21), an absorption port (41a) and an exhaust port (41b) of said third heat exchanger (41) are connected to a draining port (31b) of a second heat exchanger (31), a valve a (42) and a valve b (43) are positioned between them and an absorption port (41a) of a third heat exchanger (41), a temperature sensor (44) is positioned on an exhaust port (21b) of a first heat exchanger (21), and said valve a (42), said valve b (43), and a temperature sensor (44) are connected; and a wet-purifying part (5) , wherein an absorption duct (51) connected to an exhaust duct (13) of a processing chamber (1) is positioned on one side of a purifying main body (50) , whose upper part is divided and lower part contains detergent, the exhaust duct (52) having a blower c (55) is positioned on the other side thereof, and a draining pipe a (54) having a drain valve (53) is formed on the lower part thereof. 2. An apparatus for treating exhausted heating gas according to Claim 1, wherein a main feed pipe (61) having a pump b (61a) is connected to the lower part of said purifying main body (50), said main feed pipe (61) is connected to a first sub feed pipe (62) and a second sub feed pipe (63), which are positioned toward a first heat exchanger (21) and a second heat exchanger (31) and have a valve c (62a) and a valve d (63a), a first injection nozzle (64) and a second injection nozzle (65) are positioned at the ends of said first sub feed pipe (62) and said second sub feed pipe (63), a first collecting tank (66) having a first releaser (66a) and a second collecting tank (67) having a second releaser (67a) are positioned on the lower parts thereof, said first releaser (66a) and said second releaser (67a) are connected to a cyclone (68) having a draining pipe (68a) comprising a pump c (68b), and a draining pipe b (68a) of said pump c (68) and a draining pipe a (54) of a purifying mam body (50) comprise a cleaning part (6) connected to a storage tank (69).

Inventors: CHOI YEON MOOK, CHOI, YEON, MOOK
Applicants: CHOI YEON MOOK, CHOI, YEON, MOOK
Application year: 2000
Main classification: F23G5
IPC codes: B01D21, B01D53, F23G5, F23J15, F24F7, F28G9