TWM510193U - Wet coating vent reuse process system - Google Patents

Description

Wet coating exhaust gas treatment system

The present invention relates to an exhaust gas treatment system, in particular to a wet coating exhaust gas treatment system, which is connected to each unit structure by a pipeline, in particular to purify the recovered exhaust gas by using a zeolite rotary wheel, and then The purified purified gas is recycled and reused, thus reducing the chimney emissions by 6-14%, and reducing the use of fresh air by 86~94%.

According to FIG. 1 , which is a structural diagram of a conventional exhaust gas treatment system, a wet coating and exhaust unit 100 is connected in series with a Volatile Organic Compounds (VOC) processing unit 200, a conventional method. The air is quoted as indoor or outdoor air or specially filtered, and is introduced into the wet coating and exhausting unit 100. The air is blown to lead out the volatile organic compounds in the coating during the wet coating process. The Volatile Organic Compounds (VOC) treatment unit 200 is further introduced, and the volatile organic compounds in the exhaust gas are adsorbed and purified, concentrated and burned, and discharged to the chimney 300, and then discharged to the atmosphere.

Further, the fresh gas a is sent through the intake filter 110 through the fresh gas line A and is introduced into the heating device 130 via the intake fan 120 for heating, and the flow rate of the fresh gas a is regulated by the control valve 170 and heated. The intake gas b is formed to the required temperature, and the intake gas b is transmitted through the intake gas line B. The mouthpiece 140 of the exhaust oven 150 flows into the exhaust oven 150. Then, the exhaust gas c in the exhaust oven 150 is sucked out by the recovery fan 160, and the exhaust gas c is introduced into the volatile organic compound (VOC) processing unit 200 via the exhaust gas line C, and the exhaust gas c is The adsorption purification and concentration high-temperature oxidation combustion purification, and then the purification gas d is discharged through the purification gas pipeline D to the chimney 300.

However, according to the above exhaust treatment system, the exhaust amount of the chimney 300 is equal to the amount of gas of the exhaust gas c of the wet coating supply and exhaust unit; and the fresh air a needs to be adjusted after processing, and then introduced into the wet coating. In the cloth supply and exhaust unit 100, the air conditioning load is very high; and after the exhausted gas is removed from the volatile organic compound via the Volatile Organic Compounds (VOC) processing unit 200, a small amount of volatile organic compounds are still discharged to The atmosphere is so wasteful of energy and polluting the environment.

It can be seen that there are still many shortcomings in the above existing methods, which is not a good design and needs to be improved.

The main purpose of the present invention is to provide a wet coating exhaust gas reuse treatment system, which utilizes the adsorption purification gas through the zeolite runner, recovers the gas and then sucks back to the wet coating and supply unit according to the adsorption fan. The purpose of this application is to reduce the flow of gas from the chimney by 86 to 94% and reduce the fresh air demand by 86 to 94%, thereby achieving the purpose of reducing pollution and greatly reducing energy consumption.

The wet-coated exhaust gas recirculation treatment system of the present invention utilizes a continuous procedure of adsorption and purification of zeolite wheel, desorption and concentration of volatile organic compounds, etc., and the advantages of the present invention are that it can be suitable for processing high flow rate, low pollutant concentration and Multi-species Volatile organic compound waste gas, and is mainly used in industries related to wet coating processes.

In order to achieve the above object, the present invention is a wet coating exhaust gas reuse treatment system, which comprises a wet coating and supply unit, introducing fresh gas during the drying process of the paint, and drying the paint. Volatile organic waste gas (VOC) treatment unit formed in the process; a volatile organic compound (VOC) treatment unit, comprising: a recovery fan, is disposed in an exhaust gas line, and one end of the exhaust gas line and the wet The coating and exhausting unit is connected, and the other end is connected to a zeolite rotating wheel, and the exhaust gas is introduced into the zeolite rotor (VOC Concentrator Rotor); the zeolite rotating wheel is connected to the exhaust gas pipeline and a purification and recovery pipeline. And a desorption concentration pipeline, wherein the exhaust gas is introduced into the zeolite rotor through the exhaust gas pipeline for adsorption purification and desorption concentration, wherein the adsorption purification gas is introduced into the wet coating and exhaust unit by the purification recovery pipeline Reusing, and desorbing concentrated gas is introduced into the exhaust gas oxidation furnace processing unit by the desorption concentration pipeline; an adsorption fan is disposed in the purification recovery pipeline, and the purification recovery pipeline is Connecting the zeolite runner to pump the adsorption purification gas, the other end of the purification recovery pipeline is connected to the wet coating and supply unit, and the adsorption purification gas system is used for the wet coating process; a heater is provided, the desorption heater is used to heat the gas discharged from the cooling zone of the zeolite rotor to the desorption temperature, and the heat source can be directly heated or introduced into the exhaust gas oxidation furnace processing unit as heat exchange; a fan, the desorption fan is disposed in the desorption concentration line, and one end of the desorption concentration line is connected to the zeolite reel for pumping the desorbed concentrated gas, and the other end of the desorption concentration line is connected to An exhaust gas oxidation furnace processing unit; the exhaust gas oxidation furnace processing unit is characterized in that the volatile organic compound contained in the desorbed concentrated gas is burned and oxidized at a high temperature, and is treated to form an exhaust gas; and a chimney is passed through a discharge pipe The road is connected to the exhaust gas oxidation furnace processing unit, and the exhaust gas is used by the smoke The chimney is discharged.

The zeolite runner is divided into a process zone, a cooling zone and a desorption zone, and the zeolite runner inlet is connected to the exhaust gas line, and the exhaust gas passes through the exhaust gas. The pipeline enters the zeolite runner and flows through the adsorption zone, and the volatile organic compound in the exhaust gas of the process is adsorbed by the adsorption zone of the zeolite runner, and then becomes the adsorption purification gas, and then the purification and recovery pipeline is led back. Up to the wet coating supply and exhaust unit; and the cooling zone of the zeolite runner causes the exhaust gas to exchange heat with the zeolite rotor, and the zeolite runner is cooled and cooled, and the exhaust gas is heated to form a warming gas and Flowing to the desorption heater, the exhaust gas is heated to a desorption temperature (160-230 ° C) via the desorption heater, and then enters the desorption zone of the zeolite reel, and the desorption concentrated gas is desorbed by the desorption The concentrated line is discharged to become a desorbed concentrated gas having a high concentration of organic matter.

The adsorption fan is disposed in the purification and recovery pipeline, and one end of the purification recovery pipeline is connected to the outlet of the adsorption zone of the zeolite runner, and the other end is connected to the wet coating and supply unit, and the adsorption purification gas is borrowed By the suction of the adsorption fan, the purification recovery pipeline is sent to the wet coating and supply unit and mixed with a small amount of fresh air, and then mixed into a process intake air and then enters the intake pipeline to provide a wet coating process. use. In the wet coating process, the coating is introduced into a process of a certain temperature during the drying and ripening process, and the volatile organic compound in the coating will eventually volatilize into the process, and the exhaust gas becomes process waste and is discharged to the exhaust gas line. The line is connected to the inlet of the zeolite wheel.

In an embodiment of the present invention, the area of the adsorption zone of the zeolite runner is set to be larger, and the desorption zone and the cooling zone are two smaller processing sides of equal area. The zeolite runner is rotated by the set of electric drive devices to rotate the zeolite runner, so that the speed of the zeolite runner is variable speed and controllable Ability to rotate 2 to 6 revolutions per hour or constant speed adjustment. Further, the adsorption zone area of the zeolite runner is 60% to 84% of the zeolite runner. The cooling zone area is 5% to 10% of the zeolite runner. The area of the desorption zone is 5% to 10% of the zeolite runner.

In an embodiment of the present invention, the zeolite runner supports the rotating body as a central bearing and a supporting circular frame around the bearing, and the rotating body is made of a zeolite adsorption medium and ceramic fibers. The runner includes a gasket for separating the exhaust gas and releasing the clean gas after treatment. The material is made of a soft material (generally Silicon) which can withstand the corrosive nature of volatile organic compounds and high operating temperature.

In an embodiment of the present invention, the exhaust gas oxidation furnace processing unit is a regenerative exhaust gas oxidation treatment unit or a direct combustion exhaust gas oxidation treatment unit.

In an embodiment of the present invention, the desorption heater is further a heat exchanger, and the cooling pipeline guides the cooling gas back to the desorption zone via the heat exchanger, and the heat exchanger passes through a high temperature pipeline The exhaust gas oxidation furnace processing unit is connected, and the high temperature gas is led out from the exhaust gas oxidation furnace processing unit and introduced into the purification recovery pipeline through the heat exchanger. Furthermore, the heat exchanger further includes a control valve.

The wet coating and exhaust gas recirculation treatment system of the present invention is not limited to the above embodiments in practical use, and the actual application is further adjusted according to the requirements of the exhaust gas treatment process. The wet-coated exhaust gas recirculation treatment system of the present invention mainly requires a recovery gas for adsorbing and purifying volatile organic compounds via a zeolite rotor, thereby forming the adsorption purification gas and sucking back the wet coating through the adsorption fan. The exhaust unit is used. In addition, the wet-coating exhaust gas treatment system of the present invention can further extract the excess high-temperature gas decomposed by the high-temperature thermal oxidation decomposition organic compound from the exhaust gas oxidation furnace processing unit at the rear end through the heat exchanger. The recovery pipeline is cleaned, and the intake line of the wet coating and exhaust unit is brought back into the exhaust oven for operation.

In summary, this case is not only innovative in terms of space type, but also can enhance the above-mentioned multiple functions compared with the conventional system. It should fully comply with the statutory new patent requirements of novelty and progressiveness, and apply for it according to law. This new type of patent application, to encourage creation, to the sense of virtue.

100‧‧‧ Wet coating and exhaust unit

110‧‧‧Intake filter

120‧‧‧Intake fan

130‧‧‧ heating device

140‧‧‧Blowing mouth

150‧‧‧Exhaust oven

160‧‧‧Recycling fans

170‧‧‧Control valve

200‧‧‧Volatile Organic Compounds (VOC) processing unit

210‧‧‧Zeolite runner

211‧‧‧Adsorption zone

212‧‧‧Cooling area

213‧‧‧Decoupling area

220‧‧‧Adsorption fan

230‧‧‧Desorption heater

240‧‧‧Decoupled fan

250‧‧‧Exhaust gas oxidation furnace treatment unit

260‧‧‧ heat exchanger

300‧‧ ‧ chimney

A‧‧‧Fresh gas pipeline

a‧‧‧Fresh gas

B‧‧‧Intake gas line

b‧‧‧Intake gas

C‧‧‧Exhaust gas pipeline

c‧‧‧Exhaust gas

D‧‧‧Gas gas pipeline

D‧‧‧purified gas

F‧‧‧heating line

f‧‧‧Heating gas

G‧‧‧purification recovery pipeline

g‧‧‧Adsorption purification gas

H‧‧‧ De-concentration line

h‧‧‧Desorbed concentrated gas

I‧‧‧Drainage line

i‧‧‧Exhaust gas

J‧‧‧High temperature pipeline

j‧‧‧High temperature gas

Figure 1 is a block diagram of a conventional exhaust gas treatment system.

Figure 2 is a block diagram of the wet-coated exhaust gas recirculation treatment system of the present invention.

Figure 3 is a perspective view of the zeolite runner of the wet-coated exhaust gas recirculation treatment system of the present invention.

Figure 4 is a diagram showing an embodiment of the wet-coating exhaust gas recirculation treatment system of the present invention.

In order to achieve the above object, the wet-coating exhaust gas recirculation treatment system of the present invention is for adsorbing and purifying exhaust gas having volatile organic compounds via a zeolite runner, thereby forming the adsorption purification gas to be sucked back by the adsorption fan. The wet coating and exhausting unit is used, and the exhaust gas is divided into a cooling zone of the zeolite rotating wheel to cool the zeolite rotating wheel, heated by the desorption heater to the desorption temperature, and then flows into the zeolite rotating wheel. The auxiliary zone forms a desorbed concentrated gas, and the desorbed concentrated gas is introduced into the exhaust gas oxidation furnace processing unit to decompose the organic compound by high temperature thermal oxidation. In practical use, the excess high temperature gas of high temperature combustion oxidation can pass the heat. The exchanger is re-introduced into the purification and recovery pipeline, and then brought back to the wet coating and exhaust unit for operation, which has a significant reduction in the flow rate of the exhaust gas and is recycled. Purify the gas to achieve environmental protection and other effects.

Please refer to Fig. 2 and Fig. 3 for the structural diagram of the wet coating exhaust gas reuse treatment system and the perspective view of the zeolite runner. The zeolite runner 210 is divided into an adsorption zone 211, a cooling zone 212 and a desorption zone 213. The zeolite runner 210 is connected to the exhaust gas pipeline C of the wet coating and supply unit, and the adsorption zone 211 of the zeolite runner 210 is adsorbed. The volatile organic compound in the exhaust gas c becomes the adsorption purification gas g, and is guided back to the wet coating supply and exhaust unit by the purification recovery pipeline G, and the cooling zone 212 of the zeolite runner 210 is The exhaust gas gas c is heat-exchanged to the zeolite rotor 210, and the zeolite rotor 210 is cooled and cooled, and the exhaust gas c is heated to form a temperature rising gas f, and flows to the desorption heater 230, and the temperature rising gas f is discharged. The heater 230 is heated to a desorption temperature (160 to 230 ° C), and then recirculated to the desorption zone 213, and then desorbed volatile organic compounds to form the desorbed concentrated gas h to flow to the desorption concentration line H. The desorption concentration line H is connected to the exhaust gas oxidation furnace treatment unit 250, and is subjected to high-temperature combustion purification with a volatile organic compound. The chimney 180 communicates with the exhaust gas oxidation furnace processing unit 250 via a discharge line I, and the desorbed concentrated gas h is subjected to high-temperature combustion treatment by the exhaust gas oxidation furnace treatment unit 250 to form an exhaust gas i, which is discharged via the discharge line I. It is discharged from the chimney 180. The exhaust gas oxidizing furnace processing unit 250 may be a Regenerative Thermal Oxdizer (RTO) processing unit or a Direct Oxygen Oxidizer (TO) processing unit.

In addition, the zeolite rotating wheel of the wet coating and exhausting treatment system of the present invention is provided with an adsorption fan 220, one end of the adsorption fan 220 is connected to the adsorption zone 211, and the exhaust gas c flows through the adsorption zone 211 to form an adsorption purification. The gas g, the adsorption purification gas g flows into the adsorption fan 220 via the purification line G, and the adsorption fan 220 suctions and transports the adsorption purification gas g into the intake pipe B of the wet coating supply and exhaust unit to form An intake gas b. There is a blowing in the exhaust oven 150 a mouth 140, one end of the exhaust oven 150 communicates with the intake line B, and the intake gas b is introduced into the exhaust oven 150 through the mouthpiece 140, and the intake gas b mixes the volatile organic compound to form The exhaust gas c. The recovery fan 160 is disposed in the exhaust gas line C, and one end of the exhaust gas line C is in communication with the exhaust oven 150 of the wet coating and supply unit, and the other end is connected to the zeolite runner 210. The exhaust gas c is sucked by 160 and introduced into the zeolite runner 210.

Referring to Fig. 3 again, it is a perspective view of the zeolite runner of the wet-coating exhaust gas treatment system of the present invention. As shown, the area of the adsorption zone 211 of the zeolite runner is relatively large, and the desorption zone 212 and the cooling zone 213 are two smaller, equal-sized treatment sides. The area of the adsorption zone 211 of the zeolite runner is 60% to 84% of the zeolite runner 210. The area of the cooling zone 212 of the zeolite runner is 5% to 10% of the zeolite runner 210. The area of the desorption zone 213 of the zeolite runner is 5% to 10% of the zeolite runner 210. In actual use, the ratio of the area of the adsorption zone 211, the cooling zone 212 and the desorption zone 213 can be adjusted according to the actual situation, and the actual process of the desorption concentrated gas h emission is concentrated by the zeolite reel 210~ 20 times, the amount of the desorbed concentrated gas h is 1/10 to 1/20 of the general flow rate. Wherein, the zeolite runner 210 is driven by a group of electric drive devices for rotating the zeolite runner 210, so that the speed of the zeolite runner 210 is variable speed, and can control the ability to rotate 2 to 6 revolutions per hour or constant speed. Adjustment.

Finally, please refer to Fig. 4, which is an embodiment of the wet-coating exhaust gas recirculation treatment system of the present invention. As shown, the zeolite wheel 210 can further include a heat exchanger 260 through which the cooling gas H is directed back to the desorption zone 213 via a high temperature line. J is connected to the exhaust gas oxidation furnace processing unit 250, and the high-temperature gas j is led out from the exhaust gas oxidation furnace processing unit 250 and introduced into the chimney 300. Further, the heat exchanger 260 is further connected to the purification recovery pipeline G and the high temperature pipeline J, and is connected A control valve is disposed between the purification and recovery pipelines G for regulating the flow rate of the adsorbed purified gas g and the high temperature gas j, thereby adjusting the temperature of the intake gas b as a heat source required for the wet coating process.

The creation system connects each unit device through each pipeline, and the process exhaust gas generated by the wet coating process is introduced into the zeolite runner adsorption zone by the wet coating supply and exhaust unit, and the purified gas is brought back to the wet zone. The intake line coated with the exhaust unit is recycled and is no longer directly discharged to the atmosphere. The gas system finally discharged to the atmosphere is concentrated by the zeolite runner, and then burned and purified by the exhaust gas oxidation furnace treatment unit, and then discharged to the chimney, and the concentrated exhaust gas amount has been greatly reduced.

The creation department will use the purified gas recovery belt of the zeolite runner to return to the wet coating and supply unit, mainly to recycle and use the purified gas to reduce the flow rate of the exhaust gas, and reduce the process by recycling the purified gas. The need for fresh air, thereby reducing the load on the external air conditioning box, is in line with the dual purpose of environmental protection and energy saving.

The detailed description above is for the specific description of the novel embodiments of the present invention, and is not intended to limit the scope of the patents of the present invention. Any equivalent implementations or changes that are not departing from the spirit of the present invention should be included in the present case. In the scope of patents.

110‧‧‧Intake filter

120‧‧‧Intake fan

130‧‧‧ heating device

140‧‧‧Blowing mouth

150‧‧‧Exhaust oven

160‧‧‧Recycling fans

170‧‧‧Control valve

210‧‧‧Zeolite runner

220‧‧‧Adsorption fan

230‧‧‧Desorption heater

240‧‧‧Decoupled fan

250‧‧‧Exhaust gas oxidation furnace treatment unit

300‧‧ ‧ chimney

A‧‧‧Fresh gas pipeline

a‧‧‧Fresh gas

B‧‧‧Intake gas line

b‧‧‧Intake gas

C‧‧‧Exhaust gas pipeline

c‧‧‧Exhaust gas

F‧‧‧heating line

f‧‧‧Heating gas

G‧‧‧purification recovery pipeline

g‧‧‧Adsorption purification gas

H‧‧‧ De-concentration line

h‧‧‧Desorption of concentrated exhaust gas

I‧‧‧Drainage line

i‧‧‧Exhaust gas

Claims (8)

A wet coating exhaust gas reuse treatment system, comprising: a wet coating and supply unit, introducing fresh air into the paint during the drying and ripening process, and drying the paint to form a volatile organic compound during the ripening process Exhaust gas discharge; and a volatile organic compound processing unit, comprising: a recovery fan disposed in an exhaust gas line, and one end of the exhaust gas line is connected to the wet coating and exhausting unit, and the other end is connected a zeolite runner for introducing the exhaust gas into the zeolite rotor; the zeolite runner is connected to the exhaust gas pipeline, a purification recovery pipeline and a desorption concentration pipeline, and the exhaust gas is introduced into the exhaust gas pipeline The zeolite runner is separately subjected to adsorption purification and desorption concentration, wherein an adsorption purification gas is introduced into the wet coating and exhaust unit by the purification recovery pipeline, and a desorption concentrated gas is desorbed and concentrated. Introducing an exhaust gas oxidation furnace processing unit; an adsorption fan is disposed in the purification recovery pipeline, and one end of the purification recovery pipeline is connected to the zeolite runner for pumping the adsorption purification gas, the purification The other end of the take-up line is connected to the wet coating and supply unit, and the adsorbed purified gas system is returned to the wet coating process; a desorption heater is connected to the zeolite runner, And heating the gas discharged from the zeolite runner to the desorption temperature, the heat source of which can be directly heated or introduced into the exhaust gas oxidation furnace treatment unit as heat exchange; a desorption fan, the desorption fan is disposed in the desorption With concentrated pipe, the off One end of the concentration line is connected to the zeolite wheel for pumping the desorbed concentrated gas, and the other end of the desorption concentration line is connected to the exhaust gas oxidation furnace processing unit; the exhaust gas oxidation furnace processing unit is connected by the desorption The concentrated pipeline is connected to the zeolite rotating wheel, and the volatile organic compound contained in the desorbed concentrated gas is burned and oxidized by high temperature, and is treated to form an exhaust gas; and a chimney is connected to the exhaust gas via a discharge line. The oxidation furnace processing unit discharges the exhaust gas from the chimney. The wet-coated exhaust gas recirculation treatment system according to claim 1, wherein the zeolite runner is divided into an adsorption zone, a cooling zone and a desorption zone, and the adsorption zone of the zeolite runner adsorbs the The volatile organic compound in the exhaust gas becomes the adsorbed purification gas, and the purified recovery pipeline is led back to the wet coating and supply unit; and the cooling zone of the zeolite runner causes the exhaust gas to The zeolite runner performs heat exchange, and the zeolite runner is cooled and cooled, and the exhaust gas is heated to form a temperature rising gas and flows to the desorption heater, and the temperature rising gas is heated to the desorption temperature (160 to 230 ° C) via the desorption heater. And then enter the desorption zone of the zeolite wheel, and the desorbed concentrated gas is discharged from the desorption concentration line to become a desorbed concentrated gas having a high concentration of organic matter. The wet-coated exhaust gas recirculation treatment system according to claim 2, wherein the adsorption zone area is 60% to 84% of the zeolite runner. The wet-coated exhaust gas recirculation treatment system according to claim 2, wherein the cooling zone area is 5% to 10% of the zeolite runner. The wet-coated exhaust gas recirculation treatment system according to claim 2, wherein the desorption zone area is 5% to 10% of the zeolite runner. The wet-coated exhaust gas recirculation treatment system according to claim 1, wherein the desorption heater is a direct heater or a heat exchanger. The wet coating exhaust gas recirculation treatment system according to claim 6, wherein the heat exchanger is connected to the exhaust gas oxidation furnace processing unit via a high temperature pipeline, and the high temperature gas is extracted from the exhaust gas oxidation furnace processing unit. The purification recovery line is introduced through the heat exchanger. The wet coating exhaust gas treatment system according to claim 1, wherein the exhaust gas oxidation furnace treatment unit is a regenerative exhaust gas oxidation furnace unit or a direct combustion exhaust gas oxidation furnace treatment unit.