TW201617125A - Organic exhaust adsorption concentration purification system and method thereof - Google Patents

Abstract

The invention discloses an organic exhaust adsorption concentration purification system. Before exhaust enters a zeolite rotor concentration device, waste heat of the incinerator is guided out by utilizing the rewarming and humidity control unit, and exhaust is heated, so that the temperature of exhaust that requires entering the zeolite rotor concentration device is raised, and the relative humidity is decreased, capable of increasing the absorption capability of the zeolite rotor concentration device for organic substance within the exhaust to further improve the elimination efficiency of organic substance. Moreover, the invented organic exhaust absorption concentration purification system and its method utilize the waste heat of the incinerator to heat the exhaust. Flow of high temperature exhaust in the incinerator is introduced out and controlled according to the temperature of the exhaust heat. The invention does not need to additionally increase the device and/or pipelines for heating to have advantage of decreasing energy consumption. In addition, the pressure loss, which is resulted from externally added components, in system pipelines can be reduced, and system complexity can also be reduced.

Description

Organic waste gas absorption and desorption concentration purification system and method thereof

The present invention relates to an organic exhaust gas absorption and desorption concentration purification system and a method thereof for reducing or removing organic substances in exhaust gas.

In many processes, exhaust gas containing organic substances is produced. Most of the volatile organic substances are harmful to the human body. Therefore, the exhaust gas generated by the process needs to be purified and meet the exhaust emission standards before being discharged into the external environment. The conventional organic waste gas purification system adopts a zeolite runner concentrating device and an incinerator, wherein the zeolite runner concentrating device is internally separated by an adsorption zone and a desorption zone, and a zeolite rotor system continuously rotates through the In the adsorption zone and the desorption zone, the exhaust gas generated by the process is introduced into the adsorption zone, and the zeolite wheel is adsorbed to adsorb the organic matter in the exhaust gas, and is rotated to the zeolite runner in the desorption zone by introducing The gas stream desorbs the organic material adsorbed on the zeolite wheel, and the desorbed gas stream with the desorbed organic material is introduced into the incinerator for incineration. Thus, by the rotation operation of the zeolite runner, the zeolite runner continuously repeats the steps of adsorption and desorption, so that the organic substances contained in the exhaust gas after passing through the zeolite runner concentrating device are reduced to the discharge standard before being discharged. To the atmosphere.

In some processes (such as spraying process), the exhaust gas generated in the process contains a large amount of granules. Therefore, a washing tower or other dust-removing device is often used in the process back-end to wash the exhaust gas to reduce the particulate matter in the exhaust gas. Therefore, the exhaust gas finally discharged is low temperature and high humidity.

However, the low temperature and high humidity exhaust gas is not conducive to the removal efficiency of the organic matter by the hydrophobic zeolite in the zeolite runner concentrating device. Specifically, the temperature of the exhaust gas is higher under the relative humidity and other conditions, and the zeolite runner is higher. The lower the removal efficiency of organic substances in the exhaust gas, in the case of isopropanol, when the exhaust gas reaches above 45 °C, the removal efficiency of the zeolite wheel to isopropanol drops below 92%, and the removal efficiency is impatient with increasing temperature. Decrease; however, if the exhaust gas temperature is too low (generally below 20 °C), the zeolite runner surface may be dew condensation due to the dew point temperature of the desorbed gas, resulting in a sharp decrease in removal efficiency; fixed under temperature and other conditions, The higher the relative humidity of the exhaust gas, the lower the removal efficiency of the organic matter in the exhaust gas by the zeolite runner. In the case of isopropanol or acetone, when the relative humidity of the exhaust gas is above 85%, the zeolite runner is isopropyl alcohol or acetone. The removal efficiency is rapidly reduced to below 90%, and the removal efficiency is rapidly reduced as the relative humidity increases.

Accordingly, the conventional organic exhaust gas purification system is applied to treat low-temperature and high-humidity exhaust gas, which has poor removal efficiency for organic substances and has the disadvantage of energy consumption.

In order to solve the problem that the organic exhaust gas purification system described above is applied to treat waste gas with low temperature and high humidity, the removal efficiency of organic matter is not good, and the present invention provides an organic waste gas absorption and desorption concentration purification system and method.

To achieve the above and other objects, the present invention provides an organic waste gas absorption and desorption concentration purification system comprising an incinerator, a waste heat bypass heat exchanger, a zeolite rotor concentration device, a temperature sensor and a temperature a waste heat bypass heat exchanger connected to the combustion chamber to introduce a high temperature gas of the combustion chamber for heat exchange; the zeolite runner concentrating device has an adsorption zone, a blowing zone and a desorption zone, An inlet end of the adsorption zone is connected to an exhaust gas inlet pipe and an outlet end is connected to a chimney, and an inlet end of the blowing zone is used for inputting a blowing gas stream and an outlet end is connected to the waste heat bypass heat exchanger The blow-off gas stream is heated by the waste heat bypass heat exchanger as a desorption gas stream and is input to an inlet end of the desorption zone, the outlet end of the desorption zone being connected to the incinerator; the temperature sensing The device is disposed at an inlet end of the exhaust gas inlet pipe adjacent to the adsorption zone for measuring a temperature inside the exhaust gas intake pipe; the temperature control humidity control unit is connected to the exhaust gas intake pipe, and the temperature is controlled by the temperature The unit is led out by the incinerator Heating the exhaust gas into the exhaust gas within the trachea, and based on the temperature of the temperature sensor measuring the gas temperature to control the flow of extraction.

The above-mentioned suction and desorption enrichment purification system, wherein the regenerative temperature control unit comprises a regenerative heat exchanger, a drainage line and a circulation windmill, and the regenerative heat exchanger is connected to the waste heat bypass heat exchanger, a high temperature gas system of the waste heat bypass heat exchanger outlet is introduced into the chimney after passing through the heat recovery heat exchanger; the drain line has a lead pipe and a return pipe, and the two ends of the lead pipe are connected to the An inlet end of the adsorption zone and the regenerative heat exchanger, the return end is connected to the regenerative heat exchanger and the exhaust gas inlet pipe; the circulating windmill is disposed on the drainage line and electrically connected to the temperature sense a circulating windmill for extracting a portion of the exhaust gas at the inlet end of the adsorption zone to the regenerative exchanger via the outlet pipe, and conveying the exhaust gas after heat exchange with the high temperature gas to the exhaust gas via the return pipe The intake pipe, and the circulating windmill determines the pumping flow rate according to the temperature measured by the temperature sensor.

The above organic waste gas absorption and desorption enrichment purification system, wherein an inlet of the adsorption zone is provided with a granular filter for filtering particulate matter in the exhaust gas input from the exhaust gas intake pipe.

The organic waste gas absorption and desorption enrichment purification system, wherein the incinerator is a constant combustion 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 heat exchanger, the desorbed gas stream is preheated through the preheating heat exchanger, and then flows to the combustion chamber, and after combustion, forms a high temperature gas to enter the preheating heat exchanger for heat exchange. The waste heat bypass heat exchanger is connected to the preheating heat exchanger, and the high temperature gas system exiting the preheating heat exchanger is subjected to heat exchange with the heat recovery heat exchanger through the waste heat bypass heat exchanger.

The organic waste gas absorption and desorption enrichment purification system, wherein the outlet end of the combustion chamber is provided with a communication tank body, and the preheating heat exchanger, the waste heat bypass heat exchanger and the heat recovery heat exchanger are adjacently arranged In the communication tank body.

The organic waste gas absorption and desorption enrichment purification system, wherein the temperature control and humidity control unit comprises an exhaust gas recovery pipeline, a proportional control valve and a counterweight reverse damper, and the inlet end and the outlet end of the exhaust gas recovery pipeline Connected to the exhaust line of the incinerator and the exhaust gas intake pipe respectively; the proportional control valve is disposed on the exhaust gas recovery pipeline, and the proportional control valve is based on the temperature measured by the temperature sensor Proportionally controlling the flow rate through the exhaust gas recovery pipeline; the counterweight type anti-valve damper is disposed on the exhaust line of the incinerator and adjacent to the inlet end of the exhaust gas recovery pipeline, the counterweight type anti-valve The opening size is determined by the air pressure in the exhaust line.

The above organic waste gas absorption and desorption enrichment purification system, wherein an inlet of the adsorption zone is provided with a granular filter for filtering particulate matter in the exhaust gas input from the exhaust gas intake pipe.

In order to achieve the above object and other objects, the present invention also provides an organic waste gas absorption and desorption concentration purification method for treating an exhaust gas containing organic substances, and the organic waste gas absorption desorption purification method comprises the following steps: (1) the exhaust gas Introducing a zeolite runner concentrating device through an exhaust gas intake pipe, wherein the zeolite runner concentrating device has at least one adsorption zone and a desorption zone, and the inlet end of the adsorption zone is connected to an exhaust gas inlet pipe and an outlet end system Connected to a chimney, the inlet end of the desorption zone is connected to a desorbing gas stream and the outlet end is connected to an incinerator for incinerating the desorbed gas stream from the desorption zone; (2) eliciting The high temperature gas of the incinerator is to the exhaust gas intake pipe, and heats the exhaust gas in the exhaust gas intake pipe; (3) measuring the temperature in the exhaust gas intake pipe; (4) controlling the temperature according to the measured temperature The flow rate of the high temperature gas drawn from the incinerator. Thereby, the exhaust gas at the inlet end of the adsorption zone of the zeolite runner concentrating device is heated and dehumidified to enhance the adsorption capacity of the zeolite runner concentrating device for organic substances.

The above organic waste gas absorption and desorption enrichment purification method, wherein steps (2) to (4) are repeated to raise the temperature of the exhaust gas in the exhaust gas intake pipe to 20-40 ° C and the relative humidity is less than 80%.

In the above method (2), the high temperature gas system is taken out from the combustion chamber of the incinerator, or the high temperature gas system is the exhaust gas at the outlet end of the incinerator.

Accordingly, the organic waste gas absorption and desorption concentration purification system of the present invention and the method thereof can increase the temperature of the exhaust gas in the exhaust gas inlet pipe and reduce the relative humidity before the exhaust gas enters the zeolite runner concentrating device, thereby improving the zeolite. The concentrating device of the runner absorbing the organic matter in the exhaust gas and improving the removal efficiency of the organic matter in the exhaust gas. Moreover, the organic waste gas absorption and desorption enrichment purification system of the present invention uses the waste heat of the incinerator to heat the exhaust gas in the exhaust gas intake pipe without additional heating devices and/or pipelines, thereby having the advantage of reducing energy consumption. It can reduce the pressure loss caused by the external components in the system pipeline and reduce the system complexity.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the following specific embodiments and the accompanying drawings.

The organic waste gas absorption and desorption concentration purification system and method of the invention are used for treating exhaust gas discharged from the back end of a process, in particular, some processes (such as spraying process, etc.) are used to exhaust the exhaust gas through a washing tower before exhausting the exhaust gas. The treatment is carried out to remove most of the particulate matter in the exhaust gas, and the temperature of the exhaust gas passing through the scrubber is lowered to 20-30 ° C and the humidity is raised to 100%. The organic waste gas absorption desorption concentration purification method of the present invention comprises the following steps: (1) introducing the exhaust gas into a zeolite rotor concentrating device via an exhaust gas intake pipe, wherein the zeolite rotor concentrating device has at least one adsorption zone and one a desorption zone, the inlet end of the adsorption zone is connected to an exhaust gas inlet pipe and an outlet end is connected to a chimney, and the inlet end of the desorption zone is connected to a desorption gas stream and the outlet end is connected to an incinerator, The incinerator is used for incinerating the desorbed gas stream from the desorption zone; (2) extracting the high temperature gas of the incinerator to the exhaust gas intake pipe, and heating the exhaust gas in the exhaust gas intake pipe; (3) measuring The temperature in the exhaust gas intake pipe; (4) controlling 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 concentrating device is heated and dehumidified to enhance the adsorption capacity of the zeolite runner concentrating device for organic substances.

Referring to FIG. 1 , an organic exhaust gas absorption and desorption purification system 1 according to a first embodiment of the present invention is used for treating organic waste gas generated after a process, and includes an incinerator 110, a waste heat bypass heat exchanger 120, and a zeolite. The runner concentrating device 130, a temperature sensor 140 and a temperature control humidifying unit 150.

The incinerator 110 has a combustion chamber 111 in which a burner or an electrothermal heater is provided to allow the incoming gas to be combusted.

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

The zeolite runner concentrating device 130 has an adsorption zone 131, a blowing zone 132 and a desorption zone 133, wherein the adsorption zone 131, the blowing zone 132 and the desorption zone 133 are in a tank central zone. In the compartment formed, a zeolite runner 134 is disposed in the tank and is rotatable to sequentially pass through the adsorption zone 131, the desorption zone 133 and the purge zone 132, in the adsorption zone 131, The zeolite runner 134 adsorbs the organic matter in the exhaust gas, and in the desorption zone 33, the organic substance adsorbed on the zeolite runner 134 is desorbed by the desorption gas stream, and in the purge zone 132, The desorbed zeolite rotor 134 is cooled and dehumidified by blowing off the gas stream.

The inlet end of the adsorption zone 131 is connected to an exhaust gas intake pipe 160 and the outlet end is connected to a chimney 170, and the exhaust gas is adsorbed by the adsorption zone 131 and then discharged to the chimney 170; the purge zone 132 The inlet end is configured to input a low-temperature blow-off gas stream and the outlet end is connected to the waste heat bypass heat exchanger 120, and the low-temperature blow-off gas stream is heated by the waste heat bypass heat exchanger 120 to be a desorbed gas stream and The inlet end of the desorption zone 133 is connected to the incinerator 110, and the desorbed gas stream containing organic matter is introduced into the incinerator 110 for incineration.

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

The temperature control and humidity control unit 150 is connected to the exhaust gas intake pipe 160, and the temperature control and humidity control unit 150 extracts high temperature gas from the incinerator 110 to heat the exhaust gas in the exhaust gas intake pipe 160, and according to the sense of temperature The detector measures the temperature of 140 to control the flow of the extracted high temperature gas. The high temperature gas system drawn from the incinerator 110 mixes with the exhaust gas in the exhaust gas intake pipe 160 to heat the exhaust gas, and the exhaust gas enters the adsorption zone 131 of the zeolite runner concentrating device 130, and the temperature of the exhaust gas is raised to 20- 40 ° C and relative humidity below 80%.

In this embodiment, the temperature-controlled humidity control unit 150 includes a temperature-return heat exchanger 151, a drain line 152, and a circulation windmill 153. The heat-return heat exchanger 151 is connected to the waste heat bypass heat exchanger 120. The high temperature gas system exiting the waste heat bypass heat exchanger 120 is introduced into the chimney 170 and passes through the heat recovery heat exchanger 151. The drain line 152 has a lead-out pipe 152a and a return pipe 152b. The end of the tube 152a is connected to the inlet end of the adsorption zone 131 and the temperature return heat exchanger 151. The return pipe 152b is connected to the temperature return heat exchanger 151 and the exhaust gas inlet pipe 160 at both ends. The circulation windmill 153 The temperature is connected to the drain line 152 and electrically connected to the temperature sensor 140. The circulating windmill 153 is configured to pump the exhaust gas from the inlet end of the adsorption zone 131 to a part of the exhaust gas to the temperature converter 151 via the outlet pipe 152a. The exhaust gas after heat exchange with the high temperature gas is sent back to the exhaust gas intake pipe 160 via the return pipe 152b, and the circulating windmill 153 determines the flow rate of the pumping 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 (for example, 20 ° C), the circulating windmill 153 increases the circulating air volume, so that the exhaust gas pumped to the rewarming heat exchanger 151 The flow rate is increased, thereby increasing the higher temperature after the heat exchange and delivering the flow of exhaust gas back to the exhaust gas intake pipe 160 via the return line 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 temperature return heat exchanger 151 is lowered. Further, the higher temperature after the heat exchange is reduced and the flow rate of the exhaust gas returned to the exhaust gas intake pipe 160 is returned via the return pipe 152b.

In this embodiment, the incinerator 110 is exemplified as a double-slot type regenerative incinerator, and the two sides of the combustion chamber 111 are connected to the two regenerators 112, 113, and the intake and exhaust systems of the incinerator 110 can be The poppet valve 114 or other valve block is used to switch control. The type of the incinerator 110 and the related pipeline arrangement of the intake and exhaust are not limited to the embodiment and the drawings, and the incinerator 110 may be a three-slot regenerative incinerator or a rotary regenerative incinerator.

Accordingly, the organic exhaust gas absorption and desorption enrichment purification system 1 of the first embodiment of the present invention is configured to pass the exhaust gas temperature control unit 150 to the exhaust gas intake pipe 160 before the exhaust gas enters the zeolite rotor concentration device 130. The temperature of the exhaust gas is lowered and the relative humidity is lowered, and the adsorption capacity of the organic matter in the exhaust gas by the zeolite runner concentrating device 130 can be improved, thereby improving the removal efficiency of the organic matter in the exhaust gas. Further, the organic exhaust gas absorption and desorption enrichment purification system 1 according to the first embodiment of the present invention heats the purge gas flow by using the high temperature gas drawn from the combustion chamber 111 of the incinerator 110 as a desorption gas stream at a high temperature, and at the same time, re-extracts The high temperature gas heats the exhaust gas circulated in the heat recovery heat exchanger 151, and the heated exhaust gas flows through the drain 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 devices and/or pipelines are added, which has the advantage of reducing energy consumption. In addition, the pressure loss caused by the external components in the system pipeline can be reduced, and the system complexity can be reduced.

Referring to FIG. 2, the organic waste gas absorption and desorption purification system 1 of the first embodiment of the present invention may further comprise a granular filter 180 disposed at the entrance of the adsorption zone 131. In front of the end, it is used to filter the particulate matter in the exhaust gas input from the exhaust gas intake pipe 160 to reduce the components in the exhaust gas that block the pipeline, the zeolite runner 134, and other exhaust gases.

Please refer to FIG. 3, which is a schematic diagram of the configuration of the exhaust gas absorption and desorption purification system 2 of the second embodiment of the present invention. The second embodiment of the present invention differs from the first embodiment mainly in the structure and configuration of the incinerator, the waste heat bypass heat exchanger, and the temperature control humidity control unit. In the drawings of the present embodiment, elements having the same functions and functions as those of the first embodiment are denoted by the same reference numerals.

In the second embodiment of the present invention, the incinerator 210 is implemented as a constant-burning incinerator, and the incinerator 210 has a preheating heat exchanger 212 connected to the combustion chamber 211, and the outlet of the desorption zone 133 The end system is connected to the preheating heat exchanger 212, and the desorbed gas stream containing the organic substance is preheated through the preheating heat exchanger 212, and then flows to the combustion chamber 211, and is burned to form a high temperature gas to enter the preheating. The heat exchanger performs heat exchange, that is, the high temperature gas system and the desorbed gas stream that subsequently enters the preheating heat exchanger 212, so that the desorbed gas stream is 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 system flowing out of the preheating heat exchanger 212 serves as a heat source for heat exchange, so as to enter The desorbed gas stream in the waste heat bypass heat exchanger 220 exchanges heat with the high temperature gas.

The temperature-return heat exchanger 251 of the temperature-controlled humidity control unit 250 of the present embodiment is connected to the waste heat bypass heat exchanger 220, and the high-temperature gas system exiting the waste heat bypass heat exchanger 220 is introduced and passed through the warm-up heat. The exchanger 251 flows back to the chimney 170.

Specifically, the preheating heat exchanger 212, the waste heat bypass heat exchanger 220, and the regenerative heat exchanger 251 are disposed adjacent to each other and communicate with each other, and the high temperature gas system formed by burning the combustion chamber 211 is The preheating heat exchanger 212, the waste heat bypass heat exchanger 220, and the temperature return heat exchanger 251 are sequentially passed through. As shown in the figure, the outlet end of the combustion chamber 211 may be provided with a communication tank body 215, and the preheating heat exchanger 212, the waste heat bypass heat exchanger 220 and the temperature recovery heat exchanger 251 are disposed adjacent to each other. The communication tank body 215 is in the middle.

The drain line 252 of the temperature-control humidity unit 250 of the present embodiment has a lead-out tube 252a and a return tube 252b. The end of the lead-out tube 252a is connected to the inlet end of the adsorption zone 131 and the temperature-return heat exchanger. 251. The return pipe 252b is connected to the temperature return heat exchanger 251 and the exhaust gas intake pipe 160 at both ends.

The circulating windmill 253 of the temperature control and humidity control unit 250 of the present embodiment is disposed on the drainage line 252 and electrically connected to the temperature sensor 140 for exhausting the inlet end of the adsorption zone 131. The pumping and withdrawing portion passes through the outlet pipe 252b 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 via the return pipe 252b, and the circulating windmill 253 is based on the temperature The temperature measured by the sensor 140 determines the flow rate of the pumping.

In this embodiment, similar to the first embodiment, the organic waste gas absorption and desorption purification system 2 may include a granular filter 180 disposed at the inlet end of the adsorption zone 131. Previously, it is used to filter the particulate matter in the exhaust gas input from the exhaust gas intake pipe 160 to reduce the components in the exhaust gas that block the pipeline, the zeolite runner 134, and other exhaust gases.

Accordingly, the organic exhaust gas absorption and desorption enrichment purification system 2 of the second embodiment of the present invention allows the exhaust gas to be inhaled before the exhaust gas enters the zeolite rotor concentrating device 130 by the temperature control humidity control unit 250. The temperature of the exhaust gas in the tube 160 is raised and the relative humidity is lowered, and the adsorption capacity of the organic matter in the exhaust gas by the zeolite runner concentrating device 130 can be improved, thereby improving the removal efficiency of the organic substances in the exhaust gas. Moreover, the organic exhaust gas absorption and desorption enrichment purification system 2 of the second embodiment of the present invention flows the high temperature gas after the combustion chamber 211 of the incinerator 210 is burned through the preheating heat exchanger 212 and the waste heat bypass heat exchanger 220. And the temperature-recovering heat exchanger 251 heats the blow-off gas stream by the high-temperature gas combusted by the combustion chamber 211 as a high-temperature desorption gas stream, and heats the exhaust gas of the drain line 252 through the heated exhaust gas. The drain 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, thereby reducing the energy consumption and, in addition, reducing the system. Pressure loss in the pipeline due to the addition of components, and can reduce system complexity.

Please refer to FIG. 4, which is a schematic view showing the configuration of the organic waste gas absorption and desorption 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 is the structure and configuration of the temperature-controlled humidity control unit. In addition, the components of the embodiment of the present embodiment that function and function the same as the first embodiment are used. The same component symbol.

In the third embodiment of the present invention, the temperature-controlled humidity control unit 350 of the organic waste gas absorption and desorption purification system 3 includes an exhaust gas recovery line 351, a proportional control valve 352, and a counterweight type anti-valve 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 for burning the incinerator 310. The gas is discharged to the chimney 170.

The proportional control valve 352 is disposed on the exhaust gas recovery line 351. The proportional control valve 352 proportionally controls the passage of the exhaust gas according to the temperature sensed by the temperature sensor 140. The flow rate of the recovery line 351; for example, when the temperature measured by the temperature measuring device 140 is lower than a predetermined value (for example, 20 ° C), the proportional control valve 352 is further opened to increase the passage of the exhaust gas recovery line 351. The flow rate of the high temperature gas after the combustion treatment. When the temperature measured by the temperature measuring device 140 is higher than a predetermined value (for example, 40 ° C), the proportional control valve 352 is closed to reduce the flow rate of the high temperature gas after the combustion treatment by the exhaust gas recovery line 351. .

The counterweight type anti-valve 353 is disposed on the exhaust line 312 of the incinerator 310 adjacent to the inlet end of the exhaust gas recovery line 351, and the counterweight type anti-valve 353 has a gas pressure associated with the tube. The counterweight linkage structure (not shown), the opening size of the counterweight backstop 353 is determined according to the air pressure in the exhaust line 312.

Specifically, when the proportional control valve 352 is opened, the airflow in the exhaust line 312 flows to the exhaust gas recovery line 351, and the counterweight damper 353 is lowered due to the air pressure in the exhaust line 312. And closing or fully closing; when the proportional control valve 352 is closed, the airflow in the exhaust line 312 flows to the counterweight type anti-valve 242, and the counterweight type anti-valve 353 is due to the exhaust line. The air pressure in 312 is maintained and maintained in an open state, and the airflow in the exhaust line 312 flows through the counterweight type anti-valve 353 to the chimney 170.

In this embodiment, similar to the first embodiment, the organic waste gas absorption and desorption purification system 3 may include a granular filter 180 disposed at the inlet end of the adsorption zone 131. Previously, it is used to filter the particulate matter in the exhaust gas input from the exhaust gas intake pipe 160 to reduce the components in the exhaust gas that block the pipeline, the zeolite runner 134, and other exhaust gases.

In addition, in this embodiment, the exhaust gas recovery line 351 can be connected to a buffer gas flow line 360. 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 The control valve 361 is opened, and the exhaust gas of the incinerator 310 is introduced into the buffer tank 362 at this time, so that the exhaust gas which may contain the organic matter is sent to the zeolite runner concentrating device 130 for processing.

Accordingly, the organic exhaust gas absorption and desorption enrichment purification system 3 of the third embodiment of the present invention is configured to pass the exhaust gas temperature control unit 350 to the exhaust gas intake pipe 160 before the exhaust gas enters the zeolite rotor concentration device 130. The temperature of the exhaust gas is lowered and the relative humidity is lowered, and the adsorption capacity of the organic matter in the exhaust gas by the zeolite runner concentrating device 130 can be improved, and the removal efficiency of the organic matter in the exhaust gas can be improved. Further, the organic exhaust gas absorption and desorption enrichment purification system 3 of the third embodiment of the present invention heats the exhaust gas in the exhaust gas intake pipe 160 by using the waste heat of the exhaust gas at the outlet of the incinerator without additional heating means and/or pipelines. Therefore, it has the advantages of reducing energy consumption, and in addition, can reduce the pressure loss caused by the external components in the system pipeline, and can reduce the system complexity.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the patent application.

1‧‧‧Organic exhaust gas absorption and desorption purification system
110‧‧‧Incinerator
111‧‧‧ combustion chamber
112,113‧‧‧Reheating room
114‧‧‧Pushing valve
120‧‧‧Waste heat bypass heat exchanger
130‧‧‧Zeolite wheel concentrator
131‧‧‧Adsorption zone
132‧‧‧Blowing area
133‧‧‧Decoupling area
134‧‧‧Zeolite runner
140‧‧‧temperature sensor
150‧‧‧Return temperature control unit
151‧‧‧Return heat exchanger
152‧‧‧Drainage pipeline
152a‧‧‧Extraction
152b‧‧‧Return pipe
153‧‧ Circulating windmill
160‧‧‧Exhaust air intake pipe
170‧‧‧ chimney
180‧‧‧Grain filter
2‧‧‧Organic exhaust gas absorption and desorption purification system
210‧‧‧Incinerator
211‧‧‧ combustion chamber
212‧‧‧Preheating heat exchanger
215‧‧‧Connecting trough body
220‧‧‧Waste heat bypass heat exchanger
250‧‧‧Return temperature control unit
251‧‧‧Return heat exchanger
252‧‧‧Drainage pipeline
252a‧‧‧ lead-out tube
252b‧‧‧Return tube
253‧‧‧Circular windmill
310‧‧‧Incinerator
311‧‧‧ combustion chamber
312‧‧‧Exhaust line
314‧‧‧Pushing valve
350‧‧‧Return temperature control unit
351‧‧‧Exhaust gas recovery pipeline
352‧‧‧Proportional control valve
353‧‧‧With counterweight damper
360‧‧‧buffer airflow pipeline
361‧‧‧Control valve
362‧‧‧buffer tank

Fig. 1 is a schematic view showing the configuration of an organic waste gas absorption and desorption purification system according to a first embodiment of the present invention. Fig. 2 is a schematic view showing the arrangement of the organic waste gas suction-desorption and purification system according to the first embodiment of the present invention, which does not include a particulate filter. Fig. 3 is a schematic view showing the configuration of an organic waste gas absorption and desorption purification system according to a second embodiment of the present invention. Figure 4 is a schematic view showing the configuration of an organic waste gas absorption and desorption purification system according to a third embodiment of the present invention.

1‧‧‧Organic exhaust gas absorption and desorption purification system

110‧‧‧Incinerator

111‧‧‧ combustion chamber

112,113‧‧‧Reheating room

114‧‧‧Pushing valve

120‧‧‧Waste heat bypass heat exchanger

130‧‧‧Zeolite wheel concentrator

131‧‧‧Adsorption zone

132‧‧‧Blowing area

133‧‧‧Decoupling area

134‧‧‧Zeolite runner

140‧‧‧temperature sensor

150‧‧‧Return temperature control unit

151‧‧‧Return heat exchanger

152‧‧‧Drainage pipeline

152a‧‧‧Extraction

152b‧‧‧Return pipe

153‧‧ Circulating windmill

160‧‧‧Exhaust air intake pipe

170‧‧‧ chimney

Claims (10)

An organic waste gas absorption desorption and purification system comprises: an incinerator having a combustion chamber; a waste heat bypass heat exchanger connected to the combustion chamber to introduce high temperature gas of the combustion chamber for heat exchange; The zeolite runner concentrating device has an adsorption zone, a blowing zone and a desorption zone, wherein the inlet end of the adsorption zone is connected to an exhaust gas inlet pipe and the outlet end is connected to a chimney, and the inlet end of the blowing zone The utility model is characterized in that a blow-off gas stream and an outlet end are connected to the waste heat bypass heat exchanger, and the blow-off gas stream is heated by the waste heat bypass heat exchanger as a desorption gas stream and is input to the desorption zone. At the inlet end, the outlet end of the desorption zone is connected to the incinerator; a temperature sensor is disposed at the inlet end of the exhaust gas inlet pipe adjacent to the adsorption zone for measuring the exhaust gas inlet pipe a temperature-controlled wet unit connected to the exhaust gas intake pipe, and the temperature-controlled humidity unit is configured to extract high-temperature gas from the incinerator to heat the exhaust gas in the exhaust gas intake pipe, and sense the temperature according to the temperature Measuring the temperature to control the extraction Flow rate of hot gas. The organic waste gas absorption and desorption purification system according to Item 1, wherein the temperature control and humidity control unit comprises: a heat recovery heat exchanger connected to the waste heat bypass heat exchanger, and bypassed by the waste heat a high temperature gas system at the outlet of the heat exchanger is introduced into the chimney and flows through the heat recovery heat exchanger to the chimney; a drainage line has a lead pipe and a return pipe, and the two ends of the lead pipe are connected to the adsorption zone An inlet end and the regenerative heat exchanger, the return end is connected to the regenerative heat exchanger and the exhaust gas inlet pipe; and a circulating windmill is disposed on the drainage line and electrically connected to the temperature sensing The circulating windmill is configured to pump a portion of the exhaust gas at the inlet end of the adsorption zone to the regenerative exchanger via the outlet pipe, and to transport the exhaust gas after heat exchange with the high temperature gas back to the exhaust gas through the return pipe. The trachea, and the circulating windmill determines the pumping flow rate according to the temperature measured by the temperature sensor. The organic waste gas absorption and desorption purification system according to Item 2, wherein the inlet end of the adsorption zone is provided with a granular filter for filtering particles in the exhaust gas input from the exhaust gas inlet pipe. Shape. The organic waste gas absorption and desorption enrichment purification system according to claim 2, wherein the incinerator is a constant combustion 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 desorbed gas stream is preheated through the preheating heat exchanger, flows to the combustion chamber, and forms a high temperature gas after combustion to enter the preheating The heat exchanger performs heat exchange, and the waste heat bypass heat exchanger is connected to the preheating heat exchanger, and the high temperature gas system exiting the preheating heat exchanger passes through the waste heat bypass heat exchanger to exchange heat with the temperature The device performs heat exchange. The organic waste gas absorption and desorption enrichment purification system according to Item 4, wherein the outlet end of the combustion chamber is provided with a communication tank body, the preheating heat exchanger, the waste heat bypass heat exchanger and the back The warm heat exchanger is disposed adjacent to the communicating tank body. The organic waste gas absorption and desorption purification system according to Item 1, wherein the temperature control and humidity control unit comprises: an exhaust gas recovery pipeline, wherein the inlet end and the outlet end are respectively connected to the exhaust line of the incinerator And the exhaust gas intake pipe; a proportional control valve is disposed on the exhaust gas recovery pipeline, and the proportional control valve is proportionally controlled to pass through the exhaust gas recovery pipeline according to the temperature sensed by the temperature sensor And a counterweight damper is disposed on the exhaust line of the incinerator adjacent to the inlet end of the exhaust gas recovery pipeline, and the opening size of the counterweight damper is based on the exhaust line The pressure is determined. The organic waste gas absorption and desorption purification system according to Item 4, wherein the inlet end of the adsorption zone is provided with a granular filter for filtering particles in the exhaust gas input from the exhaust gas inlet pipe. Shape. The invention relates to an organic waste gas absorption and desorption concentration purification method for treating an exhaust gas containing organic substances, and the organic waste gas absorption and desorption concentration purification method comprises the following steps: (1) introducing the exhaust gas into a zeolite runner through an exhaust gas intake pipe to concentrate The device, wherein the zeolite wheel concentrating device has at least one adsorption zone and a desorption zone, the inlet end of the adsorption zone is connected to an exhaust gas inlet pipe and the outlet end is connected to a chimney, and the inlet end of the desorption zone Injecting a desorption gas stream and an outlet end connected to an incinerator for incinerating the desorbed gas stream from the desorption zone; (2) extracting the high temperature gas of the incinerator to the exhaust gas intake pipe And heating the exhaust gas in the exhaust gas intake pipe; (3) measuring the temperature in the exhaust gas intake pipe; and (4) controlling the flow rate of the high temperature gas drawn from the incinerator according to the measured temperature. The organic waste gas absorption desorption concentration purification method according to Item 8, wherein the steps (2) to (4) are repeated to raise the temperature of the exhaust gas in the exhaust gas intake pipe to 20-40 ° C and a low relative humidity. At 80%. The organic waste gas absorption desorption concentration purification method according to Item 8 or 9, wherein in the step (2), the high temperature gas system is taken out from a combustion chamber of the incinerator, or the high temperature gas system is the incineration. The tail gas at the outlet end of the furnace.