CN105597490B - Organic waste gas adsorption, desorption, concentration and purification system and method thereof - Google Patents

Abstract

The present invention discloses an organic waste gas adsorption, desorption, concentration and purification system. Before the waste gas enters the zeolite rotor concentration device, the waste heat of the incinerator is extracted and heated by a temperature return and humidity control unit, so that the temperature of the waste gas to enter the zeolite rotor concentration device is increased and the relative humidity is reduced, which can enhance the adsorption capacity of the zeolite rotor concentration device for organic substances in the waste gas, thereby improving the removal efficiency of organic substances in the waste gas. In addition, the organic waste gas adsorption, desorption, concentration and purification system and method of the present invention utilize the waste heat of the incinerator to heat the waste gas, and control the flow rate of the high-temperature gas extracted from the incinerator according to the temperature of the waste gas. Therefore, the present invention does not need to install additional heating devices and/or pipelines, so it has the advantage of reducing energy consumption. In addition, it can reduce the pressure loss caused by the additional components in the system pipeline and reduce the complexity of the system.

Description

Organic waste gas adsorption, desorption, concentration and purification system and method thereof

technical field

The invention relates to an organic waste gas adsorption, desorption, concentration and purification system and a method thereof, which are used for reducing or removing organic substances in waste gas.

Background technique

In many manufacturing processes, waste gas containing organic substances will be produced, and most of the volatile organic substances will cause harm to the human body. Therefore, the waste gas generated by the process must be purified and treated and meet the exhaust gas emission standards before it can be discharged into the external environment. The existing organic waste gas purification system adopts a zeolite runner concentration device and an incinerator, wherein, the zeolite runner concentration device is divided into an adsorption zone and a desorption zone, and the zeolite runner continuously rotates through the adsorption zone and the desorption zone. The waste gas generated by the process is introduced into the adsorption zone, and the organic substances in the waste gas are adsorbed by the zeolite runner, and then rotated to the zeolite runner in the desorption zone. The organic matter is desorbed, and the desorbed gas stream with the desorbed organic matter is introduced into the incinerator for incineration. In this way, through the rotating operation of the zeolite runner, the steps of adsorption and desorption are continuously repeated by the zeolite runner, so that the organic substances contained in the exhaust gas after passing through the zeolite runner concentration device can be reduced to the emission standard before they can be discharged to in the atmosphere.

In some processes (such as spraying process), the exhaust gas generated by the process contains a large amount of particulate matter. Therefore, scrubbers or other dust cleaning devices are often used at the back end of the process to wash the exhaust gas to reduce the particulate matter in the exhaust gas. Therefore, The final exhaust gas is low temperature and high humidity.

However, the low temperature and high humidity exhaust gas is not conducive to the removal efficiency of the hydrophobic zeolite for organic substances in the zeolite runner concentration device. Specifically, under the fixed relative humidity and other conditions, the higher the exhaust gas temperature The lower the removal efficiency of organic substances in the exhaust gas is, taking isopropanol as an example, when the exhaust gas reaches above 45°C, the removal efficiency of isopropanol by the zeolite runner drops to below 92%, and the removal efficiency decreases rapidly with the increase of temperature; However, if the temperature of the exhaust gas is too low (generally below 20°C), the surface of the zeolite runner may become wet due to the dew point temperature of the desorbed gas, resulting in a rapid reduction in the removal efficiency; under the fixed temperature and other conditions, the exhaust gas The higher the relative humidity, the lower the removal efficiency of zeolite runner for organic substances in waste gas. Taking isopropanol or acetone as an example, when the relative humidity of waste gas reaches more than 85%, the zeolite runner can remove isopropanol or acetone. Efficiency drops sharply below 90%, and removal efficiency drops sharply with increasing relative humidity.

Accordingly, when the existing organic waste gas purification system is applied to the treatment of waste gas with low temperature and high humidity, the removal efficiency of organic matter is not good, and there are disadvantages of energy consumption.

SUMMARY OF THE INVENTION

In order to solve the problem of poor removal efficiency of organic matter when the existing organic waste gas purification system is applied to the treatment of low temperature and high humidity waste gas, the present invention proposes an organic waste gas adsorption, desorption, concentration and purification system and method.

In order to achieve the above purpose and other purposes, the present invention provides an organic waste gas adsorption, desorption, concentration and purification system, comprising an incinerator, a waste heat bypass heat exchanger, a zeolite runner concentration device, a temperature sensor and a temperature return control unit; A heat exchanger is connected to the combustion chamber to introduce the high temperature gas in the combustion chamber for heat exchange; the zeolite runner concentration device has an adsorption zone, a blow-off zone and a desorption zone, and the inlet end of the adsorption zone is connected to the exhaust gas inlet pipe And the outlet end is connected to the chimney, the inlet end of the blow-off area is used for inputting the blow-off gas flow and the outlet end is connected to the waste heat bypass heat exchanger, and the blow-off gas flow is heated by the waste heat bypass heat exchanger as desorption. The airflow is input to the inlet end of the desorption zone, and the outlet end of the desorption zone is connected to the incinerator; the temperature sensor is arranged at the inlet end of the exhaust gas inlet pipe near the adsorption zone, and is used to measure the exhaust gas intake. The temperature in the gas pipe; the return temperature and humidity control unit is connected to the exhaust gas intake pipe, and the return temperature and humidity control unit draws high-temperature gas from the incinerator to heat the exhaust gas in the exhaust gas intake pipe, and the temperature measured by the temperature sensor is used. To control the flow rate of the extracted high temperature gas.

The above-mentioned adsorption-desorption concentration and purification system, wherein the return temperature and humidity control unit comprises a return temperature heat exchanger, a drainage pipeline and a circulating windmill, the return temperature heat exchanger is connected to the waste heat bypass heat exchanger, and the waste heat bypass heat The high-temperature gas at the outlet of the exchanger is introduced and flows to the chimney after passing through the recuperation heat exchanger; the drainage pipeline has a lead-out pipe and a return pipe, and both ends of the lead-out pipe are connected to the inlet end of the adsorption zone and the return heat. The two ends of the return pipe are connected to the return temperature heat exchanger and the exhaust gas intake pipe; the circulating windmill is arranged on the line of the drainage pipe and is electrically connected to the temperature sensor, and the circulating windmill is used for the inlet end of the adsorption zone. Part of the exhaust gas is drawn out to the temperature return exchanger through the extraction pipe, and the exhaust gas after heat exchange with the high-temperature gas is transported back to the exhaust gas intake pipe through the return pipe, and the circulating windmill is determined according to the temperature measured by the temperature sensor. pumped traffic.

In the above-mentioned organic waste gas adsorption, desorption, concentration and purification system, a particulate filter is arranged in front of the inlet end of the adsorption zone, which is used to filter the particulate matter in the exhaust gas input from the exhaust gas inlet pipe.

The above-mentioned organic waste gas adsorption, desorption, concentration and purification system, wherein the incinerator is a direct-fired incinerator, the incinerator has a preheating heat exchanger connected to the combustion chamber, and the outlet end of the desorption zone is connected to the preheating. A heat exchanger, the desorbed gas stream is preheated through the preheating heat exchanger and then flows to the combustion chamber, and after combustion, a high temperature gas is formed into the preheating heat exchanger for heat exchange, and the waste heat bypasses heat exchange The device is connected to the preheating heat exchanger, and the high temperature gas from the outlet of the preheating heat exchanger conducts heat exchange with the recuperating heat exchanger through the waste heat bypass heat exchanger.

The above-mentioned organic waste gas adsorption, desorption, concentration and purification system, wherein the outlet end of the combustion chamber is provided with a communication tank, and the preheating heat exchanger, the waste heat bypass heat exchanger and the return heat exchanger are arranged close to the communication in the tank.

The above-mentioned organic waste gas adsorption, desorption, concentration and purification system, wherein the temperature and humidity control unit comprises a tail gas recovery line, a proportional control valve and a counterweight type check damper, and the inlet end and the outlet end of the tail gas recovery line are respectively connected to the incinerator The exhaust pipeline of the furnace and the exhaust gas intake pipe; the proportional control valve is arranged on the line of the exhaust gas recovery pipe, and the proportional control valve proportionally controls the flow rate of the exhaust gas through the exhaust gas recovery pipeline according to the temperature sensed by the temperature sensor. flow; the counterweight type back damper is arranged on the exhaust pipe line of the incinerator and is adjacent to the inlet end of the exhaust gas recovery line, and the opening size of the counterweight type back damper is based on the air pressure in the exhaust line. Decide.

In the above-mentioned organic waste gas adsorption, desorption, concentration and purification system, a particulate filter is arranged in front of the inlet end of the adsorption zone, which is used to filter the particulate matter in the exhaust gas input from the exhaust gas inlet pipe.

In order to achieve the above object and other objects, the present invention also provides a method for the adsorption, desorption, concentration and purification of organic waste gas for processing waste gas containing organic substances, and the method for adsorption, desorption, concentration and purification of organic waste gas comprises the following steps: a. The exhaust gas inlet pipe is introduced into the zeolite runner concentration device, wherein the zeolite runner concentration device has at least an adsorption zone and a desorption zone, the inlet end of the adsorption zone is connected to the exhaust gas inlet pipe and the outlet end is connected to the chimney, and the inlet end of the desorption zone is connected to the chimney. The input desorption gas flow and the outlet end are connected to the incinerator, and the incinerator is used to incinerate the desorption gas flow from the desorption zone; b draw out the high temperature gas of the incinerator to the exhaust gas intake pipe, and heat the exhaust gas intake pipe The exhaust gas; c measure the temperature in the exhaust gas inlet pipe; d control the flow rate of the high temperature gas drawn from the incinerator according to the measured temperature. Thereby, the exhaust gas at the inlet end of the adsorption zone of the zeolite runner concentration device is heated up and dehumidified, so as to improve the adsorption capacity of the zeolite runner concentration device for organic substances.

The above-mentioned organic waste gas adsorption, desorption, concentration and purification method, wherein steps b to d are repeated, so that the temperature of the waste gas in the waste gas inlet pipe is raised to 20-40° C. and the relative humidity is lower than 80%.

The above-mentioned organic waste gas adsorption, desorption, concentration and purification method, wherein in the step b, the high temperature gas is drawn from the combustion chamber of the incinerator, or the high temperature gas is the tail gas at the outlet end of the incinerator.

Accordingly, the organic waste gas adsorption, desorption, concentration and purification system and method of the present invention can increase the temperature of the exhaust gas and reduce the relative humidity in the exhaust gas inlet pipe before the exhaust gas enters the zeolite runner concentration device, so that the zeolite runner can be improved. The adsorption capacity of the concentration device to the organic substances in the exhaust gas improves the removal efficiency of the organic substances in the exhaust gas. In addition, the organic waste gas adsorption, desorption, concentration and purification system of the present invention utilizes the waste heat of the incinerator to heat the waste gas in the waste gas inlet pipe without additional heating devices and/or pipelines, so it has the advantage of reducing energy consumption. Reduce the pressure loss caused by external components in the system pipeline, and can reduce the system complexity.

Description of drawings

FIG. 1 is a schematic diagram of the configuration of the organic waste gas adsorption, desorption, concentration and purification system according to the first embodiment of the present invention.

FIG. 2 is a schematic diagram of the configuration of the organic waste gas adsorption, desorption, concentration and purification system according to the first embodiment of the present invention, which does not include a particulate filter.

FIG. 3 is a schematic diagram of the configuration of the organic waste gas adsorption, desorption, concentration and purification system according to the second embodiment of the present invention.

FIG. 4 is a schematic diagram of the configuration of the organic waste gas adsorption, desorption, concentration and purification system according to the third embodiment of the present invention.

【Symbol Description】

1 Organic waste gas adsorption, desorption, concentration and purification system

110 Incinerators

111 Combustion chamber

112,113 Regenerators

114 Poppet valve

120 Waste heat bypass heat exchanger

130 Zeolite Wheel Concentrator

131 Adsorption zone

132 Blowout Zone

133 Desorption zone

134 Zeolite runner

140 Temperature sensor

150 return temperature and humidity control unit

151 Return heat exchanger

152 Drainage line

152a outlet tube

152b return line

153 Circulating windmill

160 Exhaust intake pipe

170 Chimney

180 Particulate Filter

2 Organic waste gas adsorption, desorption, concentration and purification system

210 Incinerators

211 Combustion chamber

212 Preheat heat exchanger

215 Connecting groove

220 Waste heat bypass heat exchanger

250 return temperature and humidity control unit

251 return heat exchanger

252 Drainage line

252a outlet tube

252b return line

253 Circulating windmill

310 Incinerators

311 Combustion chamber

312 Exhaust line

314 Poppet Valve

350 return temperature and humidity control unit

351 Exhaust gas recovery line

352 Proportional Control Valve

353 Counterweight Backstop Damper

360 Buffer Air Line

361 Control Valve

362 Buffer slot

Detailed ways

In order to fully understand the purpose, features and effects of the present invention, now through the following specific embodiments, and in conjunction with the accompanying drawings, the present invention is described in further detail, and the description is as follows:

The organic waste gas adsorption, desorption, concentration and purification system and method of the present invention are used to treat the waste gas discharged from the back end of the process. In particular, some processes (such as spraying process, etc.) Most of the particulate matter in the waste gas, and the temperature of the waste gas passing through the scrubber will drop to 20-30°C and the humidity will rise to 100%. The organic waste gas adsorption-desorption concentration purification method of the present invention comprises the following steps: a. the waste gas is introduced into a zeolite runner concentration device through an exhaust gas inlet pipe, wherein the zeolite runner concentration device has at least an adsorption zone and a desorption zone, and the adsorption zone is The inlet end is connected to the exhaust gas intake pipe and the outlet end is connected to the chimney, the inlet end of the desorption zone inputs the desorption gas stream and the outlet end is connected to the incinerator, the incinerator is used for incinerating the desorption gas stream from the desorption zone; b Lead out the high temperature gas of the incinerator to the exhaust gas intake pipe, and heat the exhaust gas in the exhaust gas intake pipe; c measure the temperature in the exhaust gas intake pipe; d control the high temperature drawn from the incinerator according to the measured temperature flow of gas. Thereby, the exhaust gas at the inlet end of the adsorption zone of the zeolite runner concentration device is heated up and dehumidified, so as to improve the adsorption capacity of the zeolite runner concentration device for organic substances.

As shown in FIG. 1 , the organic waste gas adsorption, desorption, concentration and purification system 1 according to the first embodiment of the present invention is used to treat the organic waste gas generated after the process, and includes an incinerator 110, a waste heat bypass heat exchanger 120, and a zeolite runner concentration device 130 , a temperature sensor 140 and a return temperature and humidity control unit 150 .

The incinerator 110 has a combustion chamber 111, and the combustion chamber 111 is provided with a burner head or an electrothermal heater, so that the incoming gas is burned and processed.

The waste heat bypass heat exchanger 120 is connected to the combustion chamber 111 to introduce high temperature gas from the combustion chamber 111 for heat exchange, wherein the high temperature gas introduced from the combustion chamber 111 serves as a heating source.

The zeolite rotor concentration device 130 has an adsorption zone 131, a purge zone 132 and a desorption zone 133, wherein the adsorption zone 131, the purge zone 132 and the desorption zone 133 are compartments formed by partitioning in the tank body , the zeolite runner 134 is arranged in the tank and can be rotated to pass through the adsorption zone 131 , the desorption zone 133 and the blow-off zone 132 in sequence. In the adsorption zone 131 , the zeolite runner 134 adsorbs the waste gas In the desorption zone 33, the organic substances adsorbed on the zeolite runner 134 are desorbed by the desorption airflow, and in the blow-off zone 132, the desorbed zeolite is rotated by the blow-off airflow. Wheel 134 cools and dehumidifies.

The inlet end of the adsorption zone 131 is connected to the exhaust gas inlet pipe 160 and the outlet end is connected to the chimney 170. The exhaust gas is adsorbed and processed by the adsorption zone 131 and then leads to the chimney 170 for discharge; the inlet end of the blow-off zone 132 is used for input The low-temperature blow-off air flow and the outlet end are connected to the waste heat bypass heat exchanger 120 , and the low-temperature blow-off air flow is heated by the waste heat bypass heat exchanger 120 as a desorption air flow and is input to the inlet of the desorption zone 133 The outlet end of the desorption zone 133 is connected to the incinerator 110, and the desorption gas stream containing organic substances is introduced into the incinerator 110 for incineration treatment.

The temperature sensor 140 is disposed at the inlet end of the exhaust gas intake pipe 160 near the adsorption zone 131 for measuring the temperature in the exhaust gas intake pipe 160 .

The return temperature and humidity control unit 150 is connected to the exhaust gas intake pipe 160, and the return temperature and humidity control unit 150 draws high-temperature gas from the incinerator 110 to heat the exhaust gas in the exhaust gas intake pipe 160, and measures 140 according to the temperature sensor. temperature to control the flow rate of the extracted high temperature gas. The high-temperature gas extracted from the incinerator 110 is mixed with the exhaust gas in the exhaust gas inlet pipe 160 to heat the exhaust gas, and before the exhaust gas enters the adsorption zone 131 of the zeolite runner concentration device 130, the temperature of the exhaust gas is raised to 20-40° C. and relative humidity below 80%.

In this embodiment, the return temperature and humidity control unit 150 includes a return heat exchanger 151, a drainage pipeline 152 and a circulating windmill 153. The return heat exchanger 151 is connected to the waste heat bypass heat exchanger 120 and is bypassed by the waste heat The high temperature gas at the outlet of the heat exchanger 120 is introduced and flows to the chimney 170 after passing through the recuperation heat exchanger 151; the drainage line 152 has an extraction pipe 152a and a return pipe 152b, and both ends of the extraction pipe 152a are connected to the adsorption zone The inlet end of 131 and the return temperature heat exchanger 151, the two ends of the return pipe 152b are connected to the return temperature heat exchanger 151 and the exhaust gas intake pipe 160; the circulating windmill 153 is arranged on the drainage pipeline 152 and is electrically connected to the The temperature sensor 140, the circulating windmill 153 is used to pump out a part of the exhaust gas at the inlet end of the adsorption zone 131 to the return temperature exchanger 151 through the extraction pipe 152a, and pass the exhaust gas after heat exchange with the high temperature gas through the return pipe 152b It is sent back to the exhaust gas intake pipe 160 , and the circulating windmill 153 determines the pumping flow rate according to the temperature measured by the temperature sensor 140 .

For example, when the temperature measured by the temperature measuring device 140 is lower than a predetermined value (eg, 20° C.), the circulating windmill 153 increases the circulating air volume, so that the exhaust gas flow rate pumped to the recuperation heat exchanger 151 increases , thereby increasing the higher temperature after heat exchange and the flow rate of exhaust gas sent back to the exhaust gas intake pipe 160 via the return pipe 152b. When the temperature measured by the temperature measuring device 140 is higher than a predetermined value (for example, 40° C.), the circulating windmill 153 reduces the circulating air volume, so that the exhaust gas flow rate pumped to the recuperation heat exchanger 151 is reduced, thereby reducing the The higher temperature after heat exchange is sent back to the exhaust gas flow of the exhaust gas intake pipe 160 via the return pipe 152b.

In this embodiment, the incinerator 110 is exemplified as a double-slot type regenerative incinerator, and two regenerators 112 and 113 are communicated on both sides of the combustion chamber 111 , and the intake and exhaust of the incinerator 110 can pass through the poppet valve 114 or other valve groups to switch. The type of the incinerator 110 and the related pipeline configuration of the intake and exhaust are not limited to this embodiment and the drawings, and the incinerator 110 can also be a three-slot regenerative incinerator or a rotary regenerative incinerator.

Accordingly, the organic waste gas adsorption, desorption, concentration and purification system 1 according to the first embodiment of the present invention passes the temperature and humidity control unit 150 to make the exhaust gas temperature in the exhaust gas inlet pipe 160 before the exhaust gas enters the zeolite rotor concentration device 130 . The temperature increase and the relative humidity decrease can improve the adsorption capacity of the zeolite runner concentration device 130 for organic substances in the exhaust gas, thereby improving the removal efficiency of the organic substances in the exhaust gas. In addition, the organic waste gas adsorption, desorption, concentration and purification system 1 according to the first embodiment of the present invention utilizes the high-temperature gas bypassed from the combustion chamber 111 of the incinerator 110 to heat the purge gas flow to serve as a high-temperature desorption gas flow, and at the same time, the high-temperature gas is extracted. The gas is used to heat the exhaust gas circulating in the regenerating heat exchanger 151, and the heated exhaust gas flows through the drainage line 152 to the exhaust gas intake pipe 160 to increase the temperature of the exhaust gas in the exhaust gas intake pipe 160 without additional heating. Therefore, it has the advantage of reducing energy consumption, and in addition, it can reduce the pressure loss caused by the additional components in the system pipeline, and can reduce the complexity of the system.

As shown in FIG. 2 , the organic waste gas adsorption, desorption, concentration and purification system 1 according to the first embodiment of the present invention may further include a particulate filter 180 , and the particulate filter gas 180 is disposed in front of the inlet end of the adsorption zone 131 for use in The particulate matter in the exhaust gas input from the exhaust gas inlet pipe 160 is filtered to reduce the particulate matter in the exhaust gas to block the pipeline, the zeolite runner 134 and other components through which the exhaust gas will pass.

As shown in FIG. 3 , it is a schematic configuration diagram of the exhaust gas adsorption, desorption, concentration and purification system 2 according to the second embodiment of the present invention. The main difference between the second embodiment of the present invention and the first embodiment is the structure and arrangement of the incinerator, the waste heat bypass heat exchanger and the return temperature and humidity control unit. In addition, in the drawings of this embodiment, the components having the same functions and functions as those of the first embodiment use the same component symbols.

In the second embodiment of the present invention, the incinerator 210 is implemented as a direct-fired incinerator, the incinerator 210 has a preheating heat exchanger 212 connected to the combustion chamber 211, and the outlet end of the desorption zone 133 is connected to In the preheating heat exchanger 212, the desorbed gas stream containing organic substances is preheated through the preheating heat exchanger 212 and then flows to the combustion chamber 211, and after combustion, a high temperature gas is formed into the preheating heat exchanger for heating Exchange, that is, the high temperature gas and the subsequent desorption gas flow entering the preheating heat exchanger 212, cause the desorption gas flow to be preheated.

In this embodiment, the waste heat bypass heat exchanger 220 is connected to the preheating heat exchanger 212 of the incinerator 210, and the high temperature gas flowing out of the preheating heat exchanger 212 is used as a heat source for heat exchange, so that the waste heat enters the The desorbed gas stream in the bypass heat exchanger 220 exchanges heat with the high temperature gas.

The regenerative heat exchanger 251 of the regenerative temperature and humidity control unit 250 in this embodiment is connected to the waste heat bypass heat exchanger 220, and the high-temperature gas from the outlet of the waste heat bypass heat exchanger 220 is introduced and passes through the regenerative heat exchanger After 251, it flows to the chimney 170.

Specifically, the preheating heat exchanger 212 , the waste heat bypass heat exchanger 220 and the recuperating heat exchanger 251 are arranged adjacent to each other and communicate with each other, so that the high-temperature gas formed by the combustion in the combustion chamber 211 is formed in sequence. Pass through the preheating heat exchanger 212 , the waste heat bypass heat exchanger 220 and the recuperation heat exchanger 251 . As shown in the figure, the outlet end of the combustion chamber 211 can be provided with a communication groove 215, and the preheating heat exchanger 212, the waste heat bypass heat exchanger 220 and the recuperation heat exchanger 251 are adjacently arranged in the communication in the tank body 215.

The drainage line 252 of the temperature return and humidity control unit 250 in this embodiment has an outlet pipe 252a and a return pipe 252b. Both ends of the outlet pipe 252a are connected to the inlet end of the adsorption zone 131 and the return temperature heat exchanger 251. Both ends of the pipe 252b are connected to the return heat exchanger 251 and the exhaust gas intake pipe 160 .

The circulating windmill 253 of the temperature return and humidity control unit 250 in this embodiment is disposed on the drainage pipeline 252 and is electrically connected to the temperature sensor 140 , and the circulating windmill 253 is used to extract a part of the exhaust gas at the inlet end of the adsorption zone 131 through The outgoing pipe 252b is sent to the temperature return exchanger 251, and the exhaust gas after heat exchange with the high temperature gas is sent back to the exhaust gas intake pipe 160 through the return pipe 252b, and the circulating windmill 253 is based on the temperature measured by the temperature sensor 140. Determines the amount of traffic to pump.

In this embodiment, the same as the first embodiment, the organic waste gas adsorption, desorption, concentration and purification system 2 may include a particulate filter 180, and the particulate filter gas 180 is disposed in front of the inlet end of the adsorption zone 131 for filtering The particulate matter in the exhaust gas input from the exhaust gas inlet pipe 160 can reduce the particulate matter in the exhaust gas to block the pipeline, the zeolite runner 134 and other components through which the exhaust gas will pass.

Accordingly, the organic waste gas adsorption, desorption, concentration and purification system 2 according to the second embodiment of the present invention passes the temperature and humidity control unit 250 to make the temperature of the exhaust gas in the exhaust gas inlet pipe 160 before the exhaust gas enters the zeolite rotor concentration device 130 . The temperature increase and the relative humidity decrease can improve the adsorption capacity of the zeolite runner concentration device 130 for organic substances in the exhaust gas, thereby improving the removal efficiency of the organic substances in the exhaust gas. In addition, the organic waste gas adsorption, desorption, concentration and purification system 2 according to the second embodiment of the present invention makes the high temperature gas after combustion in the combustion chamber 211 of the incinerator 210 flow through the preheating heat exchanger 212, the waste heat bypass heat exchanger 220 and the The regenerative heat exchanger 251 uses the high temperature gas combusted in the combustion chamber 211 to heat the blow-off gas flow as a high temperature desorption gas flow, and heat the exhaust gas in the drainage line 252, and the heated exhaust gas passes through the drainage line 252 flows back to the exhaust gas intake pipe 160 to increase the temperature of the exhaust gas in the exhaust gas intake pipe 160 without additional heating devices and/or pipelines, so it has the advantage of reducing energy consumption. pressure loss caused by components, and can reduce system complexity.

As shown in FIG. 4 , which is a schematic configuration diagram of the organic waste gas adsorption, desorption, concentration and purification system 3 according to the third embodiment of the present invention. The main difference between the third embodiment of the present invention and the first embodiment lies in the structure and configuration of the temperature and humidity control unit. In addition, the components in the drawings of this embodiment that have the same functions and functions as those of the first embodiment use the same components. component symbol.

In the third embodiment of the present invention, the temperature return and humidity control unit 350 of the organic waste gas adsorption, desorption, concentration and purification system 3 includes a tail gas recovery line 351 , a proportional control valve 352 and a counterweight type reverse damper 353 .

The inlet end and the outlet end of the exhaust gas recovery line 351 are respectively connected to the exhaust line 312 of the incinerator 310 and the exhaust gas intake pipe 160 , wherein the exhaust line 312 is used to discharge the gas after the combustion of the incinerator 310 to the Chimney 170.

The proportional control valve 352 is disposed on the exhaust gas recovery line 351 , and the proportional control valve 352 proportionally controls the flow rate through the exhaust gas recovery line 351 through the opening size of the valve according to the temperature sensed by the temperature sensor 140 For example, when the temperature measured by the temperature measuring device 140 is lower than a predetermined value (eg, 20° C.), the proportional control valve 352 is also opened to increase the combustion-treated high-temperature gas passing through the exhaust gas recovery line 351 traffic. When the temperature measured by the temperature measuring device 140 is higher than a predetermined value (eg, 40° C.), the proportional control valve 352 is closed to reduce the flow rate of the combustion-treated high-temperature gas through the exhaust gas recovery line 351 .

The counterweight type back damper 353 is disposed on the exhaust line 312 of the incinerator 310 and close to the inlet end of the exhaust gas recovery line 351. The counterweight type back damper 353 has a counterweight connection associated with the air pressure in the pipe. According to the moving structure (not shown in the figure), the opening size of the counterweight type check damper 353 is determined according to the air pressure in the exhaust line 312 .

Specifically, when the proportional control valve 352 is opened, the air flow in the exhaust line 312 flows to the exhaust gas recovery line 351 , and the counterweight check valve 353 is closed due to the drop in air pressure in the exhaust line 312 Small or fully closed; when the proportional control valve 352 is closed, the air flow in the exhaust line 312 flows to the counterweight back damper 242 , and the counterweight back damper 353 is affected by the air pressure in the exhaust line 312 The open state is maintained unchanged, so that the airflow in the exhaust line 312 flows to the chimney 170 through the counterweight type backdraft damper 353 .

In this embodiment, the same as the first embodiment, the organic waste gas adsorption, desorption, concentration and purification system 3 may include a particulate filter 180, and the particulate filter gas 180 is disposed in front of the inlet end of the adsorption zone 131 for filtering The particulate matter in the exhaust gas input from the exhaust gas inlet pipe 160 can reduce the particulate matter in the exhaust gas to block the pipeline, the zeolite runner 134 and other components through which the exhaust gas will pass.

In addition, in this embodiment, the exhaust gas recovery line 351 can be connected to the buffer gas flow line 360, and the buffer gas flow line 360 is provided with a control valve 361 and a buffer tank 362. When the poppet valve 314 of the incinerator switches the flow direction, the control valve 361 At this time, the exhaust gas of the incinerator 310 is introduced into the buffer tank 362, so that the exhaust gas that may contain organic substances is sent to the zeolite rotor concentration device 130 for treatment.

Accordingly, the organic waste gas adsorption, desorption, concentration and purification system 3 according to the third embodiment of the present invention passes through the temperature and humidity control unit 350 to make the exhaust gas temperature in the exhaust gas inlet pipe 160 before the exhaust gas enters the zeolite rotor concentration device 130 . The temperature increase and the relative humidity decrease can improve the adsorption capacity of the zeolite runner concentration device 130 for organic substances in the exhaust gas, thereby improving the removal efficiency of the organic substances in the exhaust gas. In addition, the organic waste gas adsorption, desorption, concentration and purification system 3 according to the third embodiment of the present invention utilizes the waste heat of the exhaust gas at the outlet of the incinerator to heat the waste gas in the waste gas inlet pipe 160 without additional heating device and/or pipeline, so it has The advantages of reducing energy consumption, in addition, can reduce the pressure loss caused by the additional components in the system pipeline, and can reduce the complexity of the system.

The present invention has been disclosed above through preferred embodiments, however, those skilled in the art should understand that the embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to this embodiment should be set to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims (7)

1. an organic waste gas adsorption-desorption concentration purification system, is characterized in that, comprises: Incinerators, having combustion chambers; a waste heat bypass heat exchanger, connected to the combustion chamber to introduce high temperature gas from the combustion chamber for heat exchange; The zeolite runner concentration device has an adsorption zone, a blow-off zone and a desorption zone. The inlet end of the adsorption zone is connected to the exhaust gas inlet pipe and the outlet end is connected to the chimney. The inlet end of the blow-off zone is used to input the blow-off airflow and the outlet. The end is connected to the waste heat bypass heat exchanger, and the blow-off gas is heated by the waste heat bypass heat exchanger as a desorption gas stream and is input to the inlet end of the desorption zone, and the outlet end of the desorption zone is connected to the desorption zone. incinerator; a temperature sensor, disposed at the inlet end of the exhaust gas intake pipe close to the adsorption zone, for measuring the temperature in the exhaust gas intake pipe; and The return temperature and humidity control unit is connected to the exhaust gas intake pipe, and the return temperature and humidity control unit draws high-temperature gas from the incinerator to heat the exhaust gas in the exhaust gas intake pipe, and controls the extracted gas according to the temperature measured by the temperature sensor. The flow of high temperature gas, the temperature and humidity control unit includes: a regenerating heat exchanger, connected to the waste heat bypass heat exchanger, the high temperature gas from the outlet of the waste heat bypass heat exchanger is introduced and flows to the chimney after passing through the regenerating heat exchanger; The drainage pipeline has a lead-out pipe and a return pipe, two ends of the lead-out pipe are connected to the inlet end of the adsorption zone and the return temperature heat exchanger, and both ends of the return pipe are connected to the return temperature heat exchanger and the exhaust gas intake pipe; and A circulating windmill is arranged on the drainage pipeline and is electrically connected to the temperature sensor, and the circulating windmill is used to draw out a part of the exhaust gas at the inlet end of the adsorption zone to the return heat exchanger through the lead-out pipe, and heat the gas with the high-temperature gas. The exchanged exhaust gas is sent back to the exhaust gas intake pipe through the return pipe, and the circulating windmill determines the pumping flow according to the temperature measured by the temperature sensor. 2. The organic waste gas adsorption, desorption, concentration and purification system as claimed in claim 1, wherein a particulate filter is provided in front of the inlet end of the adsorption zone for filtering the waste gas input from the waste gas inlet pipe. Granules. 3. The organic waste gas adsorption, desorption, concentration and purification system according to claim 1 or 2, wherein the incinerator is a direct-fired incinerator, and the incinerator has a preheating heat exchanger connected to the combustion chamber, And the outlet end of the desorption zone is connected to the preheating heat exchanger, the desorption gas flow is preheated through the preheating heat exchanger and flows to the combustion chamber, and after combustion, a high temperature gas is formed into the preheating heat. The heat exchanger performs heat exchange, the waste heat bypass heat exchanger is connected to the preheating heat exchanger, and the high temperature gas from the outlet of the preheating heat exchanger conducts heat exchange with the return heat exchanger through the waste heat bypass heat exchanger . 4. The organic waste gas adsorption, desorption, concentration and purification system according to claim 3, wherein the outlet end of the combustion chamber is provided with a communication groove, the preheating heat exchanger, the waste heat bypass heat exchanger and the The return temperature heat exchanger is adjacently arranged in the communication tank body. 5. The organic waste gas adsorption, desorption, concentration and purification system according to claim 3, wherein a particulate filter is provided in front of the inlet end of the adsorption zone for filtering the particulate matter in the exhaust gas input from the exhaust gas inlet pipe thing. 6. An organic waste gas adsorption, desorption, concentration and purification system, characterized in that, comprising: Incinerators, having combustion chambers; a waste heat bypass heat exchanger, connected to the combustion chamber to introduce high temperature gas from the combustion chamber for heat exchange; The zeolite runner concentration device has an adsorption zone, a blow-off zone and a desorption zone. The inlet end of the adsorption zone is connected to the exhaust gas inlet pipe and the outlet end is connected to the chimney. The inlet end of the blow-off zone is used to input the blow-off airflow and the outlet. The end is connected to the waste heat bypass heat exchanger, and the blow-off gas is heated by the waste heat bypass heat exchanger as a desorption gas stream and is input to the inlet end of the desorption zone, and the outlet end of the desorption zone is connected to the desorption zone. incinerator; a temperature sensor, disposed at the inlet end of the exhaust gas intake pipe close to the adsorption zone, for measuring the temperature in the exhaust gas intake pipe; and The return temperature and humidity control unit is connected to the exhaust gas intake pipe, and the return temperature and humidity control unit draws high-temperature gas from the incinerator to heat the exhaust gas in the exhaust gas intake pipe, and controls the extracted gas according to the temperature measured by the temperature sensor. The flow of high temperature gas, the temperature and humidity control unit includes: The exhaust gas recovery pipeline, the inlet end and the outlet end of which are respectively connected to the exhaust pipeline of the incinerator and the exhaust gas intake pipe; a proportional control valve, arranged on the line of the exhaust gas recovery line, the proportional control valve proportionally controls the flow rate through the exhaust gas recovery line according to the temperature sensed by the temperature sensor; and The counterweight type backdraft damper is arranged on the exhaust pipe line of the incinerator and close to the inlet end of the exhaust gas recovery pipeline. The opening size of the counterweight type backdraft damper is determined according to the air pressure in the exhaust gas pipeline. 7. An organic waste gas adsorption, desorption, concentration and purification method according to the organic waste gas adsorption, desorption, concentration and purification system according to any one of claims 1 to 6, for the treatment of waste gas containing organic substances, characterized in that the The organic waste gas adsorption-desorption concentration purification method includes the following steps: a The exhaust gas is introduced into the zeolite runner concentration device through the exhaust gas inlet pipe, wherein the zeolite runner concentration device has at least an adsorption zone and a desorption zone, the inlet end of the adsorption zone is connected to the exhaust gas inlet pipe and the outlet end is connected to the chimney, and the desorption zone is connected to the chimney. The inlet end of the attachment zone is input with the desorption gas stream and the outlet end is connected to the incinerator, and the incinerator is used for incinerating the desorption gas stream from the desorption zone; b Lead out the high temperature gas of the incinerator to the exhaust gas intake pipe, and heat the exhaust gas in the exhaust gas intake pipe, the high temperature gas is led out from the combustion chamber of the incinerator, or, the high temperature gas is the exhaust gas at the outlet end of the incinerator; c measure the temperature in the exhaust gas intake pipe; d control the flow rate of the high temperature gas from the incinerator based on the measured temperature; and e Repeat steps b to d to raise the temperature of the exhaust gas in the exhaust gas intake pipe to 20-40°C and the relative humidity to be lower than 80%.

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