Special waste gas treatment all-in-one machine for automobile repair based on catalytic combustion of zeolite runner

Abstract

The utility model discloses a special waste gas treatment all-in-one machine for automobile repair based on zeolite runner catalytic combustion, which is mainly applied to VOCs (volatile organic compounds) waste gas treatment in the automobile repair industry, a core unit of the all-in-one machine comprises a multi-stage dry type filtering system, a runner system, a catalytic combustion system and a PLC (programmable logic controller) automatic control system, and the catalytic combustion system comprises a heat exchanger, a heater, a catalyst and a catalytic chamber. Waste gas passes through a multi-stage dry type filtering system to remove particles in the waste gas, particle dust is prevented from blocking zeolite rotating wheel holes, and efficient adsorption and concentration of VOCs in the zeolite rotating wheel are guaranteed; according to the desorption procedure, the gas is subjected to heat exchange at the temperature of 140-220 DEG C and enters a desorption area, VOCs adsorbed by the rotating wheel are desorbed out, high-concentration waste gas obtained after desorption enters a catalytic chamber to be subjected to catalytic treatment, the VOCs are oxidized into water vapor and carbon dioxide, and the waste gas is purified. The equipment adopts a PLC (Programmable Logic Controller) control system to realize automation of purification and desorption processes, the desorption preheating time of the equipment is short, the operation of the all-in-one machine can be guaranteed by utilizing the waste heat of the system after the equipment is operated, and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to an integrated exhaust gas treatment machine for automobile repair based on zeolite rotor catalytic combustion. Background Technology

[0002] In the automotive repair industry, processes such as painting, sanding, and cleaning generate large amounts of VOCs (volatile organic compounds). Direct emission of these gases not only causes serious environmental pollution but also harms human health. Therefore, a highly efficient, safe, and environmentally friendly waste gas treatment system is needed. Current waste gas treatment equipment suffers from low treatment efficiency, large footprint, and high energy consumption. Large equipment in auto repair shops, such as lifts, paint booths, and compressors, already occupy significant space, leaving limited room for installation of waste gas treatment devices. Traditional waste gas treatment equipment, due to its large footprint, cannot meet the needs of the automotive repair industry. Therefore, it is necessary to design a compact, highly efficient, and energy-saving integrated waste gas treatment unit specifically for automotive repair. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion.

[0004] An integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion includes an upper purification unit and a lower purification unit. The lower purification unit is sequentially equipped with a dust-laden VOCs exhaust gas inlet, a multi-stage dry filtration system, a zeolite rotor, and a purified gas outlet. The zeolite rotor includes an adsorption zone and a desorption zone. After the dust-laden VOCs exhaust gas passes through the multi-stage dry filtration system to remove solid particles, the VOCs exhaust gas passes through the zeolite rotor and is adsorbed onto the adsorption material loaded on it. This area is called the adsorption zone of the zeolite rotor. After the VOCs exhaust gas is treated by the zeolite rotor and meets the standards, it is discharged through the purified gas outlet.

[0005] The purification equipment is equipped with a desorption fan, heat exchanger, catalytic chamber, and heater inside the catalytic chamber. The zeolite rotor rotates to the desorption zone, and the 200°C gas in the heat exchanger enters the desorption zone of the zeolite rotor to desorb and concentrate the adsorbed VOCs waste gas. The zeolite rotor continues to rotate to the adsorption zone to continue the adsorption treatment of VOCs gas, so that the rotor is always in the "adsorption-desorption-adsorption" cycle. The concentrated VOCs waste gas enters the heat exchanger for catalytic preheating and then enters the catalytic chamber where the heater heats the VOCs waste gas. The VOCs are catalytically combusted into carbon dioxide and water vapor. The purified gas re-enters the heat exchanger, and part of the gas circulates within the system and enters the desorption zone to continue desorption by the zeolite rotor. The remaining gas is discharged to the chimney.

[0006] As a further improvement, the multi-stage dry filtration system includes G4+F6 filters and F9 filters, DPA, or washable ceramic-metal filters.

[0007] As a further improvement, the adsorbent material on the zeolite rotor is a honeycomb corrugated profile made of glass fiber paper loaded with molecular sieves.

[0008] As a further improvement, the heater in the catalytic chamber is an electric heater or a heater that uses natural gas as fuel.

[0009] As a further improvement, the lower layer of the purification equipment is equipped with a control cabinet, which contains a PLC automatic control device for controlling the start and stop of the integrated exhaust gas treatment machine for automotive repair.

[0010] As a further improvement, the lower layer of the purification equipment is equipped with several inspection doors for the installation and maintenance of the equipment.

[0011] As a further improvement, the catalytic chamber of the purification device contains a catalyst, which can reduce the heat required for the catalytic combustion of VOCs.

[0012] Beneficial effects:

[0013] This utility model is highly efficient and energy-saving. It uses a zeolite rotor to concentrate VOCs in the exhaust gas, reducing the processing volume and thus lowering equipment costs and catalytic combustion energy consumption. A portion of the purified high-temperature gas enters the desorption zone via a desorption fan for further rotor desorption, allowing for the reuse of system waste heat. Therefore, after the automotive repair exhaust gas integrated system is in operation, the operating cost of the integrated machine is further reduced.

[0014] This invention is environmentally friendly in terms of emissions. VOCs waste gas can be discharged in compliance with emission standards after being treated by rotary adsorption. After being concentrated by rotary adsorption, the VOCs gas is desorbed and enters the catalytic chamber to be oxidized into carbon dioxide and water vapor, which can meet the relevant national environmental protection standards.

[0015] This invention achieves automated control. Through a PLC automated control device, the purification and desorption processes are automated, reducing manual maintenance costs. The equipment can operate in two modes: continuous and intermittent. When the amount of paint sprayed in the auto repair shop is small or the spraying time is short, the intermittent mode can be activated, allowing only the zeolite rotor to rotate for adsorption. Once the adsorption material in the rotor is saturated with VOCs, the PLC controls the start of desorption and catalytic combustion, further reducing the operating cost of the integrated machine.

[0016] This utility model has a compact structure and an integrated design that makes the equipment small in size and suitable for auto repair shops of all sizes. Attached Figure Description

[0017] Figure 1 This is a front view of an integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion;

[0018] Figure 2 This is a top-down view of the lower part of the purification equipment;

[0019] Figure 3 This is an internal top view of the upper part of the purification equipment;

[0020] Figure 4 This is a structural diagram of a honeycomb-type corrugated adsorption material;

[0021] Figure 5 This is a simplified flowchart of the integrated waste gas treatment machine.

[0022] 1. Upper layer of purification equipment 2. Lower layer of purification equipment 3. Dust-laden VOCs exhaust gas inlet 4. Multi-stage dry filtration system 5. Zeolite rotor 51. Adsorption zone 52. Desorption zone 6. Purified gas outlet 7. Desorption fan 8. Heat exchanger 9. Catalytic chamber 10. Heater 11. Control cabinet 12. Inspection door 13. Adsorption material 14. Chimney Detailed Implementation

[0023] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0024] like Figures 1-5 As shown, an integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion includes an upper purification unit 1, a lower purification unit 2, a dust-laden VOCs exhaust gas inlet 3, a multi-stage dry filtration system 4, a zeolite rotor 5, an adsorption zone 51, a desorption zone 52, a purified gas outlet 6, a desorption fan 7, a heat exchanger 8, a catalytic chamber 9, a heater 10, a control cabinet 11, an inspection door 12, adsorption material 13, and a chimney 14.

[0025] An integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion includes an upper purification unit 1 and a lower purification unit 2. The lower purification unit 2 is sequentially equipped with a dust-laden VOCs exhaust gas inlet 3, a multi-stage dry filtration system 4, a zeolite rotor 5, and a purified gas outlet 6. The multi-stage dry filtration system 4 includes G4+F6 filters, F9 filters, DPA, or washable ceramic-metal filters. The adsorption material 13 on the zeolite rotor 5 is a honeycomb-shaped corrugated profile made of glass fiber paper loaded with molecular sieves. The zeolite rotor 5 includes an adsorption zone 51 and a desorption zone 52. After the dust-laden VOCs exhaust gas passes through the multi-stage dry filtration system 4 to remove solid particles, the VOCs exhaust gas passes through the zeolite rotor 5 and is adsorbed in the adsorption material loaded on it. This area is called the adsorption zone 51 of the zeolite rotor 5. After the VOCs exhaust gas is treated by the zeolite rotor 5 and meets the standards, it is discharged through the purified gas outlet 6.

[0026] The upper layer 1 of the purification equipment is equipped with a desorption fan 7, a heat exchanger 8, a catalytic chamber 9, and a heater 10 in the catalytic chamber 9. The heater 10 in the catalytic chamber 9 is an electric heater 10 or a heater using natural gas as fuel. The zeolite rotor 5 rotates to the desorption zone 52, and the 200°C gas in the heat exchanger 8 enters the desorption zone of the zeolite rotor to desorb and concentrate the adsorbed VOCs waste gas. The zeolite rotor 5 continues to rotate to the adsorption zone 51 to continue the adsorption treatment of VOCs gas, so that the zeolite rotor 5 is always in the "adsorption-desorption-adsorption" cycle. Alternatively, according to the customer's site conditions, after adsorption saturation, an intermittent regeneration mode can be implemented. The concentrated VOCs waste gas enters the heat exchanger 8 for catalytic preheating and then enters the catalytic chamber 9. The VOCs waste gas is heated by the heater 10, and the VOCs are catalytically combusted into carbon dioxide and water vapor. The purified gas re-enters the heat exchanger 8. A portion of the gas circulates within the system and enters the desorption zone 51 to continue desorption by the zeolite rotor 5. The remaining gas is discharged to the chimney 14.

[0027] The lower layer 2 of the purification equipment is equipped with a control cabinet 11, which contains a PLC automatic control device for controlling the start and stop of the integrated exhaust gas treatment machine for automotive repair.

[0028] The lower layer 2 of the purification equipment is also equipped with several inspection doors 12 for the installation and maintenance of the equipment.

[0029] The design of this utility model has the following features:

[0030] Firstly, it is highly efficient and energy-saving. It uses a zeolite rotor to concentrate VOCs in the exhaust gas, reducing the processing volume and thus lowering equipment costs and the energy consumption of catalytic combustion. A portion of the purified high-temperature gas enters the desorption zone via a desorption fan to continue rotor desorption, allowing for the reuse of system waste heat. Therefore, after the automotive repair exhaust gas integrated system is in operation, the operating cost of the integrated machine is further reduced.

[0031] Secondly, the emissions are environmentally friendly. VOCs waste gas can be discharged in compliance with standards after being treated by rotary adsorption. After being concentrated by rotary adsorption, the VOCs gas is desorbed and enters the catalytic chamber to be oxidized into carbon dioxide and water vapor, which can meet the relevant national environmental protection standards.

[0032] Thirdly, it achieves automated control. Through the PLC automated control device, the purification and desorption processes are automated, reducing manual maintenance costs. The equipment can be divided into two operating modes: continuous and intermittent. When the amount of paint sprayed in the auto repair shop is small or the spraying time is short, the intermittent mode can be started, which only makes the zeolite rotor rotate for adsorption. When the accumulated VOCs in the rotor are large, the PLC controls the start of desorption and catalytic combustion, further reducing the operating cost of the integrated machine.

[0033] Fourth, its compact structure and integrated design make the equipment small in size and suitable for auto repair shops of all sizes.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion, characterized in that, The equipment includes an upper and a lower purification unit. The lower purification unit contains, in sequence, a dust-laden VOCs waste gas inlet, a multi-stage dry filtration system, a zeolite rotor, and a purified gas outlet. The zeolite rotor includes an adsorption zone and a desorption zone. After the dust-laden VOCs waste gas passes through the multi-stage dry filtration system to remove solid particles, the VOCs waste gas passes through the zeolite rotor and is adsorbed onto the adsorption material loaded on it. This area is called the adsorption zone of the zeolite rotor. After the VOCs waste gas is treated by the zeolite rotor and meets the standards, it is discharged through the purified gas outlet. The purification equipment is equipped with a desorption fan, heat exchanger, catalytic chamber, and heater inside the catalytic chamber. When the zeolite rotor rotates to the desorption zone, the gas at 140-220°C in the heat exchanger enters the desorption zone of the zeolite rotor, where the adsorbed VOCs waste gas is desorbed and concentrated. The zeolite rotor continues to rotate to the adsorption zone to continue the adsorption treatment of VOCs gas, so that the rotor is always in the "adsorption-desorption-adsorption" cycle. The concentrated VOCs waste gas enters the heat exchanger for catalytic preheating and then enters the catalytic chamber where the heater heats the VOCs waste gas. The VOCs are catalytically combusted into carbon dioxide and water vapor. The purified gas re-enters the heat exchanger. A portion of the gas circulates within the system and enters the desorption zone to continue desorption by the zeolite rotor. The remaining gas is discharged to the chimney.

2. The integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion according to claim 1, characterized in that, The multi-stage dry filtration system includes G4+F6 filters and F9 filters, DPA or washable ceramic-metal filters.

3. The integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion according to claim 1, characterized in that, The adsorbent material on the zeolite rotor is a honeycomb corrugated profile made of glass fiber paper loaded with molecular sieves.

4. The integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion according to claim 1, characterized in that, The heater in the catalytic chamber is an electric heater or a heater that uses natural gas as fuel.

5. The integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion according to claim 1, characterized in that, The purification equipment has a control cabinet at the bottom, which contains a PLC automatic control device for controlling the start and stop of the integrated exhaust gas treatment machine for automotive repair.

6. The integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion according to claim 1, characterized in that, The lower part of the purification equipment is equipped with several inspection doors for the installation and maintenance of the equipment.

7. The integrated exhaust gas treatment machine for automotive repair based on zeolite rotor catalytic combustion according to claim 1, characterized in that, The catalytic chamber of the purification device contains a catalyst, which can reduce the heat required for the catalytic combustion of VOCs.

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