Exhaust gas catalytic purification device

Abstract

The utility model discloses a waste gas catalytic purification device, including a waste gas purification system and an activated carbon regeneration system. The waste gas purification system includes an activated carbon adsorption box, waste gas is passed upstream of the activated carbon adsorption box, and an emptying device is connected downstream of the activated carbon adsorption box. The introduced waste gas is adsorbed and purified by the activated carbon adsorption box to generate clean gas and is discharged through the emptying device; the activated carbon regeneration system includes a catalytic reaction device, the catalytic reaction device includes a heat exchanger, a catalytic bed and an electric heater, a first fan is connected between the catalytic bed and the activated carbon adsorption box, air is passed upstream of the electric heater, the downstream of the electric heater is connected to the activated carbon adsorption box through a heat exchanger, the upstream of the catalytic bed is connected to the activated carbon adsorption box, and the downstream of the catalytic bed is connected to the emptying device through a heat exchanger. The utility model has the effects of energy saving and environmental protection, activated carbon can achieve desorption and regeneration, and can effectively achieve the purpose of purifying waste gas.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas catalytic purification device. Background Art

[0002] Low-concentration organic waste gas will be generated during the processing of coating, painting, home appliances, shoemaking, plastics and various production equipment. These organic waste gases contain toxic and harmful substances and are usually accompanied by pungent odors. If they are directly discharged into the atmosphere, they will cause atmospheric pollution. Usually, this type of organic waste gas in factories is characterized by large air volume and low concentration. Therefore, it is urgent to develop a purification and treatment equipment for large air volume and low concentration of organic waste gas. Utility Model Content

[0003] The utility model aims to provide an exhaust gas catalytic purification device, which is energy-saving and environmentally friendly, can realize desorption and regeneration of activated carbon, and can effectively purify the exhaust gas.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions: an exhaust gas catalytic purification device, comprising an exhaust gas purification system and an activated carbon regeneration system, the exhaust gas purification system comprising an activated carbon adsorption box, exhaust gas is passed upstream of the activated carbon adsorption box, and an emptying device is connected downstream of the activated carbon adsorption box, and the introduced exhaust gas is adsorbed and purified by the activated carbon adsorption box to generate clean gas and is discharged through the emptying device;

[0005] The activated carbon regeneration system includes a catalytic reaction device, which includes a heat exchanger, a catalyst bed and an electric heater. A first fan is connected between the catalyst bed and the activated carbon adsorption box. Air is introduced upstream of the electric heater, and the downstream of the electric heater is connected to the activated carbon adsorption box through a heat exchanger. The upstream of the catalyst bed is connected to the activated carbon adsorption box, and the downstream of the catalyst bed is connected to the emptying device through the heat exchanger.

[0006] By adopting the above technical scheme, when the device works normally, the organic impurities in the exhaust gas are adsorbed and filtered by the activated carbon adsorption box, and the remaining clean gas is discharged into the atmosphere through the emptying device. Before the activated carbon in the activated carbon adsorption box of the device reaches saturation, the activated carbon regeneration system is started, and the electric heater is started to heat the air to produce hot air by introducing external air. The hot air enters the activated carbon adsorption box to desorb the organic impurities adsorbed by the activated carbon to obtain concentrated organic waste gas. Under the guidance of the first fan, these organic waste gases enter the catalyst bed to undergo catalytic reaction and are decomposed into water and carbon dioxide, and are finally discharged through the emptying device. In addition, when the catalyst bed is working, a large amount of heat will be generated during the catalytic reaction. The heat generated by the catalysis is exchanged with the air before entering the activated carbon adsorption box through the heat exchanger. In this way, the heating power of the electric heater can be gradually reduced with the extension of time, so as to achieve the purpose of energy saving and environmental protection. It has the effects of energy saving and environmental protection, desorption and regeneration of activated carbon, and effective purification of waste gas.

[0007] The utility model is further configured as follows: the exhaust gas purification system also includes a dry filter box, which is connected to the exhaust gas inlet end of the activated carbon adsorption box, and a plurality of medium-efficiency filter bags for filtering dust in the exhaust gas are arranged in the dry filter box.

[0008] By adopting the above technical solution, the medium-efficiency filter bag of the dry filter box can pre-filter the exhaust gas before entering the activated carbon adsorption box, remove the heavy dust particles in the exhaust gas as much as possible, and prevent the dust from entering the active adsorption box and causing blockage.

[0009] The utility model is further configured as follows: the air inlet end of the dry filter box is connected to a second fan for extracting waste gas.

[0010] The utility model is further configured as follows: the activated carbon adsorption box is provided with an air intake electromagnetic diverter valve and an air outlet electromagnetic valve, the first outlet end of the air intake electromagnetic diverter valve is connected to the inner cavity of the activated carbon adsorption box, and an activated carbon molecular sieve adsorption layer is provided in the activated carbon adsorption box.

[0011] By adopting the above technical scheme, the air intake solenoid diverter valve and the air outlet solenoid valve can independently control the on and off of the air intake and outlet of the activated carbon adsorption box, and can also accurately control the relative amount of airflow entering and exhausting the activated carbon adsorption box, thereby improving the accuracy of the airflow control of the utility model.

[0012] The utility model is further configured as follows: the activated carbon molecular sieve adsorption layer is configured as a honeycomb structure with vertical openings.

[0013] By adopting the above technical solution and using an activated carbon molecular sieve adsorption layer with a honeycomb structure, the resistance to airflow is lower, thereby reducing the energy consumption of the entire system during operation.

[0014] The utility model is further configured as follows: a plurality of airflow distributors are arranged in the activated carbon adsorption box, and the airflow distributors are used to guide the airflow entering the activated carbon adsorption box to blow toward the activated carbon molecular sieve adsorption layer.

[0015] By adopting the above technical solution, the airflow distributor can guide the airflow entering the activated carbon adsorption box, so that the exhaust gas can be blown toward the activated carbon molecular sieve adsorption layer under the guidance of the airflow distributor, thereby preventing the generation of turbulence and further reducing the noise during the operation of the utility model.

[0016] The utility model is further configured as follows: slide rails are provided on both sides of the activated carbon adsorption box, a support frame is provided on the slide rails for sliding support, the activated carbon molecular sieve adsorption layer is embedded in the support frame, and a plurality of hollow holes for ventilation are opened at the bottom of the support frame.

[0017] By adopting the above technical solution, the activated carbon molecular sieve adsorption layer can be slidably set on the slide rail in the activated carbon adsorption box through the support frame, which is convenient for the installation, disassembly and replacement of the activated carbon molecular sieve adsorption layer. The hollow holes on the support frame allow the airflow to freely pass through the activated carbon molecular sieve adsorption layer through the hollow holes.

[0018] The utility model is further configured as follows: the activated carbon adsorption box is provided with a back-purge device, and the back-purge device is connected to the second outlet end of the air intake electromagnetic diverter valve.

[0019] By adopting the above technical solution, when the activated carbon molecular sieve adsorption layer is clogged and the air flow rate becomes smaller, the first outlet end is controlled to be closed through the air intake electromagnetic diverter valve, and the second outlet end is controlled to be opened at the same time, so that the exhaust gas can enter the back-purge device to realize back-purge, and the particulate dust that clogs the activated carbon molecular sieve adsorption layer is blown away, thereby extending the service life of the activated carbon molecular sieve adsorption layer, reducing the number of times the activated carbon molecular sieve adsorption layer is replaced, and thus reducing the cost of use.

[0020] The utility model is further configured as follows: the back-purge device includes a purge pipeline and a pressurizing device arranged upstream of the purge pipeline; the upstream of the pressurizing device is connected to the second outlet end of the intake electromagnetic diverter valve through a filter; and the downstream of the purge pipeline is provided with a plurality of purge nozzles aligned with the lower end of the activated carbon molecular sieve adsorption layer.

[0021] By adopting the above technical scheme, since the back-purge device is only used when the activated carbon molecular sieve adsorption layer is judged to be blocked when the gas output is reduced, the filter can adsorb the dust in the exhaust gas to prevent the gas blown out from the purge nozzle during back-purge from being mixed with dust particles and clogging the activated carbon molecular sieve adsorption layer. The pressurizing device can increase the wind speed of the airflow blown out from the purge nozzle to improve the cleaning effect of the activated carbon molecular sieve adsorption layer when purging.

[0022] The utility model is further configured as follows: the activated carbon adsorption box is provided with a fire sprinkler device, and the catalytic reaction device is provided with a dustproof flame arrester.

[0023] By adopting the above technical solution, when an accidental fire occurs in the activated carbon adsorption box due to excessive exhaust gas concentration, the fire sprinkler device can serve the purpose of emergency fire extinguishing, and the dust and flame arrester can also serve the purpose of preventing the catalytic reaction device from accidentally catching fire.

[0024] In summary, the utility model has the following beneficial effects:

[0025] An exhaust gas purification system and an activated carbon regeneration system are arranged in the exhaust gas catalytic purification device, wherein the exhaust gas purification system includes an activated carbon adsorption box, the activated carbon adsorption box generates clean gas after adsorption and purification and is discharged through an emptying device; the activated carbon regeneration system includes a catalytic reaction device, the catalytic reaction device includes a heat exchanger, a catalytic bed and an electric heater. When the device is working normally, organic impurities in the exhaust gas are adsorbed and filtered by the activated carbon adsorption box, and the remaining clean gas is discharged into the atmosphere through the emptying device. Before the activated carbon in the activated carbon adsorption box of the device reaches saturation, the activated carbon regeneration system is started, and the electric heater is started to heat by introducing external air to the electric heater. The air is used to make hot air, which enters the activated carbon adsorption box to desorb the organic impurities adsorbed by the activated carbon to obtain concentrated organic waste gas. Under the guidance of the first fan, these organic waste gases enter the catalyst bed to undergo catalytic reaction and are decomposed into water and carbon dioxide, and are finally discharged through the emptying device. In addition, when the catalyst bed is working, a large amount of heat will be generated during the catalytic reaction. The heat generated by the catalysis is exchanged with the air before entering the activated carbon adsorption box through the heat exchanger. In this way, the heating power of the electric heater can be gradually reduced over time, thereby achieving the purpose of energy saving and environmental protection. It has the advantages of energy saving and environmental protection, desorption and regeneration of activated carbon, and effective purification of waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the utility model.

[0027] Figure 2 It is a top view of the utility model.

[0028] Figure 3 It is the internal structure diagram of the activated carbon adsorption box of the utility model.

[0029] Figure 4 This utility model Figure 3 A partial enlarged view of area A.

[0030] Figure 5 It is the work flow chart of the utility model.

[0031] In the figure: 101, activated carbon adsorption box; 1011, air inlet electromagnetic diverter valve; 1012, air outlet electromagnetic valve; 1013, activated carbon molecular sieve adsorption layer; 1014, air flow distributor; 1015, slide rail; 1016, support frame; 1016a, hollow hole; 1017, fire sprinkler; 1018, discharge valve; 102, dry filter box; 103, second fan; 201, heat exchanger; 202, catalytic bed; 203, electric heater; 204, first fan; 301, emptying device; 4, back-purge device; 401, purge pipeline; 402, pressurizing device; 403, filter; 404, purge nozzle; 501, adsorption pipeline; 502, air supply fan; 503, maintenance platform. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings.

[0033] An exhaust gas catalytic purification device, such as Figure 1-2 and Figure 5 As shown, it includes an exhaust gas purification system and an activated carbon regeneration system. The exhaust gas purification system includes an activated carbon adsorption box 101. Exhaust gas is passed upstream of the activated carbon adsorption box 101. The activated carbon adsorption box 101 is connected to an emptying device 301 downstream. The introduced exhaust gas is adsorbed and purified by the activated carbon adsorption box 101 to generate clean gas and is discharged through the emptying device 301. The activated carbon regeneration system includes a catalytic reaction device. The catalytic reaction device includes a heat exchanger 201, a catalyst bed 202 and an electric heater 203. A first fan 204 is connected between the catalyst bed 202 and the activated carbon adsorption box 101. Air is supplemented upstream of the electric heater 203 through a supplementary air fan 502. The downstream of the electric heater 203 is connected to the activated carbon adsorption box 101 through the heat exchanger 201. The upstream of the catalyst bed 202 is connected to the activated carbon adsorption box 101, and the downstream of the catalyst bed 202 is connected to the emptying device 301 through the heat exchanger 201.

[0034] like Figure 3-5 As shown, the exhaust gas purification system also includes a dry filter box 102, which is connected to the exhaust gas inlet end of the activated carbon adsorption box 101. The dry filter box 102 is provided with a plurality of medium-efficiency filter bags for filtering dust in the exhaust gas. The heavy medium-efficiency filter bags of the dry filter box 102 can realize pre-filtration of the exhaust gas before entering the activated carbon adsorption box 101, and try to remove heavy dust particles in the exhaust gas to prevent dust from entering the active adsorption box and causing blockage; the air inlet end of the dry filter box 102 is connected to a second fan 103 for extracting exhaust gas.

[0035] like Figure 3As shown, the activated carbon adsorption box 101 is provided with an air inlet electromagnetic diverter valve 1011 and an air outlet electromagnetic valve 1012. The first outlet end of the air inlet electromagnetic diverter valve 1011 is connected to the inner cavity of the activated carbon adsorption box 101. An activated carbon molecular sieve adsorption layer 1013 is provided in the activated carbon adsorption box 101. The air inlet electromagnetic diverter valve 1011 and the air outlet electromagnetic valve 1012 can independently control the on-off of the air inlet and air outlet of the activated carbon adsorption box 101, and can also accurately control the relative amount of airflow entering and discharged from the activated carbon adsorption box 101, thereby improving the accuracy of airflow control of the utility model. The activated carbon molecular sieve adsorption layer 1013 is set as a honeycomb structure with vertical openings. The activated carbon molecular sieve adsorption layer 1013 with a honeycomb structure has lower resistance to airflow, thereby reducing the energy consumption of the entire system during operation; a plurality of airflow distributors 1014 are arranged in the activated carbon adsorption box 101. The airflow distributors 1014 are used to guide the airflow entering the activated carbon adsorption box 101 to blow toward the activated carbon molecular sieve adsorption layer 1013. The airflow distributors 1014 can guide the airflow entering the activated carbon adsorption box 101, so that the exhaust gas can be guided by the airflow distributors 1014. The activated carbon molecular sieve adsorption layer 1013 is blown to prevent the generation of turbulence, and the noise during the operation of the utility model can be further reduced; slide rails 1015 are provided on both sides of the activated carbon adsorption box 101, and a support frame 1016 is provided on the slide rails 1015 for sliding support. The activated carbon molecular sieve adsorption layer 1013 is embedded in the support frame 1016, and a plurality of hollow holes 1016a for ventilation are provided at the bottom of the support frame 1016, so that the activated carbon molecular sieve adsorption layer 1013 can slide through the support frame 1016 to set the slide rail 1015 in the activated carbon adsorption box 101 On the upper side, it is convenient to install, disassemble and replace the activated carbon molecular sieve adsorption layer 1013. The hollow holes 1016a on the support frame 1016 allow the airflow to freely pass through the activated carbon molecular sieve adsorption layer 1013 through the hollow holes 1016a; the activated carbon adsorption box 101 is provided with a fire sprinkler device 1017, and the catalytic reaction device is provided with a dustproof and flame arrester. When an accidental fire occurs in the activated carbon adsorption box 101 due to excessive exhaust gas concentration, the fire sprinkler device 1017 can serve the purpose of emergency fire extinguishing, and the dustproof and flame arrester can also serve the purpose of preventing the catalytic reaction device from accidentally catching fire.

[0036] like Figure 3-4As shown, the activated carbon adsorption box 101 is provided with a back-sweeping device 4, which is connected to the second outlet end of the air intake electromagnetic diverter valve 1011. When the activated carbon molecular sieve adsorption layer 1013 is blocked and the air flow rate becomes smaller, the first outlet end is controlled to be closed by the air intake electromagnetic diverter valve 1011, and the second outlet end is controlled to be opened at the same time, so that the exhaust gas can enter the back-sweeping device 4 to realize back-sweeping, and the particulate dust blocking the activated carbon molecular sieve adsorption layer 1013 is blown away, and the activated carbon molecular sieve adsorption layer 1013 is extended. The back-purge device 4 includes a purge pipeline 401 and a pressurizing device 402 arranged upstream of the purge pipeline 401. The pressurizing device 402 is connected to the second outlet end of the air intake electromagnetic diverter valve 1011 through a filter 403. A plurality of purge nozzles 404 aligned with the lower end of the activated carbon molecular sieve adsorption layer 1013 are arranged downstream of the purge pipeline 401. Since the back-purge device 4 is only arranged at the activated carbon molecular sieve adsorption layer 1013, the back-purge device 4 is connected to the second outlet end of the air intake electromagnetic diverter valve 1011 through a filter 403. 013 is used to judge blockage when the gas output volume decreases. The filter 403 can adsorb dust in the exhaust gas to prevent dust particles from being mixed in the gas blown out from the purge nozzle 404 during back-purge and blocking the activated carbon molecular sieve adsorption layer 1013. The pressurizing device 402 can increase the wind speed of the air flow blown out from the purge nozzle 404 to improve the cleaning effect of the activated carbon molecular sieve adsorption layer 1013 during purge. In addition, in this embodiment, a discharge valve 101 connected to the dry filter box 102 is provided on the upper part of the activated carbon adsorption box 101. 8, for discharging the airflow containing fine particles separated by backblowing into the dry filter box 102 for dust filtration; and the inlet and outlet ends of the dry filter box 102 and the activated carbon adsorption box 101 are connected with differential pressure gauges, for real-time judgment of the blockage conditions of the dry filter box 102 and the activated carbon adsorption box 101, so that the medium-efficiency filter bag and the activated carbon molecular sieve adsorption layer 1013 can be replaced in time, or the backblowing device 4 can be started in time for backblowing cleaning; a maintenance platform 503 for convenient maintenance is provided next to the device.

[0037] The basic working principle of the utility model is as follows: an exhaust gas purification system and an activated carbon regeneration system are arranged in the exhaust gas catalytic purification device, wherein the exhaust gas purification system comprises an activated carbon adsorption box 101, the exhaust gas purification system comprises an activated carbon adsorption box 101, the activated carbon adsorption box 101 generates clean gas after adsorption and purification and is discharged through an emptying device 301; the activated carbon regeneration system comprises a catalytic reaction device, the catalytic reaction device comprises a heat exchanger 201, a catalytic bed 202 and an electric heater 203, when the device is working normally, organic impurities in the exhaust gas are adsorbed and filtered by the activated carbon adsorption box 101, and the remaining clean gas is discharged into the atmosphere through the emptying device 301, and before the activated carbon in the activated carbon adsorption box 101 of the device reaches saturation, the activated carbon regeneration system is started, and the activated carbon is regenerated by introducing external air to the electric heater 203 The electric heater 203 is started to heat the air to produce hot air, and the hot air enters the activated carbon adsorption box 101 to desorb the organic impurities adsorbed by the activated carbon to obtain concentrated organic waste gas. Under the guidance of the first fan 204, these organic waste gases enter the catalyst bed 202 to undergo catalytic reaction and are decomposed into water and carbon dioxide, and are finally discharged through the emptying device 301. In addition, when the catalyst bed 202 starts working, a large amount of heat will be generated during the catalytic reaction. The heat generated by the catalysis is exchanged with the air before entering the activated carbon adsorption box 101 through the heat exchanger 201. In this way, the heating power of the electric heater 203 can be gradually reduced with the extension of time, so as to achieve the purpose of energy saving and environmental protection. It has the effects of energy saving and environmental protection, the activated carbon can be desorbed and regenerated, and the purpose of purifying the waste gas can be effectively achieved.

[0038] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An exhaust gas catalytic purification device, characterized in that: The invention comprises an exhaust gas purification system and an activated carbon regeneration system, wherein the exhaust gas purification system comprises an activated carbon adsorption box (101), exhaust gas is passed upstream of the activated carbon adsorption box (101), and an emptying device (301) is connected downstream of the activated carbon adsorption box (101), and the exhaust gas passed in is adsorbed and purified by the activated carbon adsorption box (101) to generate clean gas which is discharged through the emptying device (301); The activated carbon regeneration system comprises a catalytic reaction device, which comprises a heat exchanger (201), a catalyst bed (202) and an electric heater (203); a first fan (204) is connected between the catalyst bed (202) and the activated carbon adsorption box (101); air is introduced upstream of the electric heater (203); the downstream of the electric heater (203) is connected to the activated carbon adsorption box (101) through the heat exchanger (201); the upstream of the catalyst bed (202) is connected to the activated carbon adsorption box (101); the downstream of the catalyst bed (202) is connected to the emptying device (301) through the heat exchanger (201).

2. The exhaust gas catalytic purification device according to claim 1, characterized in that: The exhaust gas purification system further comprises a dry filter box (102), wherein the dry filter box (102) is connected to the exhaust gas inlet end of the activated carbon adsorption box (101), and wherein a plurality of medium-efficiency filter bags for filtering dust in the exhaust gas are arranged in the dry filter box (102).

3. The exhaust gas catalytic purification device according to claim 2, characterized in that: The air inlet end of the dry filter box (102) is connected to a second fan (103) for extracting waste gas.

4. The exhaust gas catalytic purification device according to claim 1, characterized in that: The activated carbon adsorption box (101) is provided with an air intake electromagnetic diverter valve (1011) and an air outlet electromagnetic valve (1012); a first outlet end of the air intake electromagnetic diverter valve (1011) is in communication with an inner cavity of the activated carbon adsorption box (101); and an activated carbon molecular sieve adsorption layer (1013) is provided in the activated carbon adsorption box (101).

5. The exhaust gas catalytic purification device according to claim 4, characterized in that: The activated carbon molecular sieve adsorption layer (1013) is configured as a honeycomb structure with vertical openings.

6. The exhaust gas catalytic purification device according to claim 4, characterized in that: A plurality of airflow distributors (1014) are provided in the activated carbon adsorption box (101), and the airflow distributors (1014) are used to guide the airflow entering the activated carbon adsorption box (101) to blow toward the activated carbon molecular sieve adsorption layer (1013).

7. The exhaust gas catalytic purification device according to claim 4, characterized in that: Slide rails (1015) are provided on both sides of the activated carbon adsorption box (101), a support frame (1016) is provided on the slide rails (1015) for sliding support, the activated carbon molecular sieve adsorption layer (1013) is embedded in the support frame (1016), and a plurality of hollow holes (1016a) for ventilation are provided at the bottom of the support frame (1016).

8. The exhaust gas catalytic purification device according to claim 4, characterized in that: The activated carbon adsorption box (101) is provided with a back-sweeping device (4), and the back-sweeping device (4) is connected to the second outlet end of the air intake electromagnetic diverter valve (1011).

9. The exhaust gas catalytic purification device according to claim 8, characterized in that: The reverse purge device (4) comprises a purge pipeline (401) and a pressurizing device (402) arranged upstream of the purge pipeline (401); the pressurizing device (402) is connected upstream to the second outlet end of the air intake electromagnetic diverter valve (1011) through a filter (403); and a plurality of purge nozzles (404) aligned with the lower end of the activated carbon molecular sieve adsorption layer (1013) are arranged downstream of the purge pipeline (401).

10. The exhaust gas catalytic purification device according to claim 1, characterized in that: The activated carbon adsorption box (101) is provided with a fire sprinkler device (1017), and the catalytic reaction device is provided with a dust and flame arrester.

Images