CN217613877U

CN217613877U - Water paint application exhaust gas purification system

Info

Publication number: CN217613877U
Application number: CN202221328035.4U
Authority: CN
Inventors: 王涛; 杨旭; 蒋伟; 王翼鹏
Original assignee: Shenzhen Yinghe Environment Iot Technology Co ltd
Current assignee: Shenzhen Yinghe Environment Iot Technology Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-10-21
Anticipated expiration: 2032-05-30

Abstract

The application relates to the technical field of waste gas treatment, in particular to a waste gas purification system for water-based paint coating. The water paint coating waste gas purification system comprises an adsorption bed, an adsorption fan, a desorption fan, a catalytic combustion furnace, a mixer and a discharge device, wherein an adsorption medium is arranged in the adsorption bed, the adsorption bed is connected with the adsorption fan, and the adsorption bed is communicated with the discharge device; a desorption pipeline is connected between the desorption fan and the adsorption bed, the desorption fan is connected with the catalytic combustion furnace, the catalytic combustion furnace is connected with the mixer, and a circulating pipeline is connected between the mixer and the adsorption bed. The application provides a water paint coating exhaust gas purification system for activated carbon has prolonged activated carbon's life by reuse, has reduced activated carbon's change frequency, and can also retrieve catalytic combustion's heat, be favorable to energy saving and emission reduction, reduce system's running cost.

Description

Water paint application exhaust gas purification system

Technical Field

The application relates to the technical field of waste gas treatment, in particular to a waste gas purification system for water-based paint coating.

Background

In the existing system coating process, the water-based paint is used more and more, the water-based paint can generate a large amount of moisture, paint mist particles and a small amount of organic volatile substances during the spraying and drying processes of workpieces, the atomized paint is mostly attached to the surface of a product, but a part of the paint is dissipated in the air, the part of the paint can be attached to a machine and influences the normal use of the machine, and the part of the paint can be sucked into the body by workers and influences the physical health of the workers.

Currently, for the treatment of water paint waste gas, single treatment processes such as an activated carbon adsorption treatment method, a spray washing method, a plasma method and the like and a combination process of multiple treatment modes are generally adopted. Wherein, the spray washing method needs to add chemicals and clean regularly, the maintenance workload is large, and the secondary pollution is caused by the generated waste water. The activated carbon adsorption treatment is relatively more convenient and more environment-friendly, but the activated carbon needs to be replaced regularly, and the operation cost is very high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the operating cost is high due to the fact that the activated carbon proposed in the background art needs to be replaced regularly, the application provides a water paint coating waste gas purification system.

The application provides a water paint application exhaust gas purification system adopts following technical scheme:

a waste gas purification system for water paint coating comprises an adsorption bed, an adsorption fan, a desorption fan, a catalytic combustion furnace, a mixer and a discharge device, wherein an adsorption medium is arranged in the adsorption bed, the adsorption bed is connected with the adsorption fan, and the adsorption bed is communicated with the discharge device; a desorption pipeline is connected between the desorption fan and the adsorption bed, the desorption fan is connected with the catalytic combustion furnace, the catalytic combustion furnace is connected with the mixer, and a circulating pipeline is connected between the mixer and the adsorption bed.

By adopting the technical scheme, harmful gas is absorbed after the waste gas to be treated passes through the adsorption bed, and the treated clean waste gas is discharged through the discharge device; the desorption gas takes away harmful gas adsorbed by the adsorption medium after flowing through the adsorption bed and is sent to the catalytic combustion furnace by the desorption fan, the harmful gas is catalyzed to be combusted and is converted into harmless carbon dioxide and water vapor, the temperature of the carbon dioxide and the water vapor obtained by combustion is higher, the carbon dioxide and the water vapor enter the mixer and are mixed with the outside air to control the temperature of the gas, the mixed gas at a certain temperature as desorption gas enters the adsorption bed again through a circulating pipeline, the desorption cycle is completed, the activated carbon can be recycled by carrying out thermal desorption on the activated carbon, the service life of the activated carbon is prolonged, the replacement frequency of the activated carbon is reduced, and the reduction of the operation cost of a system is facilitated.

Preferably, the adsorption fan is connected between the adsorption bed and the discharge device.

Through adopting above-mentioned technical scheme, adsorption fan installs between adsorption bed and discharging equipment for all pipelines and devices before adsorption fan are in the negative pressure state, can ensure that whole clean system can not reveal waste gas to the environment in.

Preferably, a filter is connected to the inlet of the adsorption bed.

Through adopting above-mentioned technical scheme, the filter can carry out filtration treatment with the particulate matter in the waste gas earlier for the particulate matter is difficult for blockking up adsorption media's adsorption hole, so that adsorption media keeps long-term good adsorption effect.

Preferably, the adsorption medium is honeycomb activated carbon.

By adopting the technical scheme, the honeycomb activated carbon is of a block structure, so that the honeycomb activated carbon is convenient to maintain and replace, the wind resistance of the whole system is low, and the operating cost is low.

Preferably, the catalytic combustion furnace comprises a heater and a catalytic combustion bed on which a catalyst is supported.

Through adopting above-mentioned technical scheme, the heater heats desorption gas for organic compound is catalytic combustion in catalytic combustion bed department under the catalyst effect, turns into harmless carbon dioxide and water, is convenient for directly discharge.

Preferably, the catalytic combustion furnace further comprises a heat exchanger, the heat exchanger is connected with the desorption fan, the heat exchanger is connected with the flow mixer, and a combustion pipe and an exhaust gas pipe are connected between the heat exchanger and the combustion bed.

Through adopting above-mentioned technical scheme, desorption gas flow takes away the harmful gas that adsorption medium adsorbs behind the adsorption bed and is sent to the heat exchanger by the desorption fan and preheats, and desorption gas after preheating passes through the combustion tube and gets into in the catalytic combustion bed, and harmful gas is burnt by the catalysis, changes into high temperature harmless gas, and the rethread waste gas pipe flows back to in the heat exchanger and carries out heat exchange with desorption gas, preheats desorption gas, reaches the purpose of energy saving consumption.

Preferably, a flame arrester is arranged between the adsorption bed and the catalytic combustion furnace.

Through adopting above-mentioned technical scheme, the spark arrester is favorable to preventing that flame from spreading to the adsorption bed in, is favorable to avoiding causing the damage to the adsorption media.

To sum up, compare with the correlation technique, the utility model discloses following beneficial effect has:

1. the utility model discloses carry out the thermal desorption to the active carbon for the active carbon has prolonged the life of active carbon by reuse, has reduced the change frequency of active carbon, is favorable to reducing the system operation expense.

2. The utility model discloses set up the heat exchanger, preheat the desorption gas before desorption gas gets into catalytic combustion furnace, be favorable to harmful gas to be burnt by catalysis, change into harmless carbon dioxide and vapor, the carbon dioxide and the vapor temperature that the burning obtained are higher, can flow back to the heat exchanger once more and carry out heat exchange with the desorption gas, preheat the desorption gas, reached energy saving consumption's purpose.

Drawings

Fig. 1 is a schematic view of the overall structure of the purification system.

Description of the reference numerals: 1. a filter; 2. an adsorption gas inlet pipe; 3. an adsorption bed; 4. an adsorption gas outlet pipeline; 5. an adsorption fan; 6. a fan exhaust duct; 7. a discharge device; 8. desorbing the pipeline; 9. a desorption fan; 10. a flame arrestor; 11. a catalytic combustion furnace; 12. a flow mixer; 13. a circulation pipe; 14. an online monitoring room; 15. a system control room; 16. a control valve; 17. a heat exchanger; 18. a heater; 19. a catalytic combustion bed; 20. a combustion tube; 21. an exhaust pipe.

Detailed Description

The present application is described in further detail below with reference to the attached drawing figures.

Referring to fig. 1, the embodiment of the application discloses a water paint coating waste gas purification system, which comprises a filter 1, an adsorption air inlet pipeline 2, an adsorption bed 3, an adsorption air outlet pipeline 4, an adsorption fan 5, a fan exhaust pipeline 6, a discharge device 7, a desorption pipeline 8, a desorption fan 9, a flame arrester 10, a catalytic combustion furnace 11, a mixer 12, a circulating pipeline 13, an online monitoring room 14 and a system control room 15.

Referring to fig. 1, a filter 1, an adsorption gas inlet pipeline 2, an adsorption bed 3, an adsorption gas outlet pipeline 4, an adsorption fan 5, a fan exhaust pipeline 6 and a discharge device 7 are connected in sequence, and control valves 16 are installed at an inlet and an outlet of the adsorption bed 3. The adsorption bed 3, the desorption pipeline 8, the desorption fan 9, the flame arrester 10, the catalytic combustion furnace 11, the mixer 12 and the circulating pipeline 13 are sequentially connected to form a closed loop, so that desorption circulation is facilitated.

Referring to fig. 1, big amount of wind low concentration organic waste gas filters through getting into filter 1 after collecting earlier, filters the gas that filters big particulate matter and gets into adsorption bed 3 from adsorbing inlet line 2 and adsorb and handle, gives vent to anger pipeline 4 through adsorbing behind the VOC gas in the adsorption media adsorption waste gas and flows to adsorption fan 5, and rethread adsorption fan 5 provides power and discharges up to standard from discharging device 7 along fan exhaust duct 6 with waste gas. The discharging device 7 is a chimney, and the adsorption fan 5 is arranged between the adsorption bed 3 and the chimney, so that all pipelines and devices in front of the adsorption fan 5 are in a negative pressure state, and the whole purification system can be ensured not to leak waste gas into the environment. In other embodiments, the chimney is provided with an online monitor, which can monitor the exhaust emission in real time, and the purified gas can meet the strictest emission standard requirements in the current industry.

Referring to fig. 1, the filter 1 includes coarse, middle and high-efficiency three-stage filtering to filter the particulate matter in the exhaust gas, and after the exhaust gas passes through the filter 1, the size of the particulate matter in the exhaust gas is controlled to be below 5 μm, so that the particulate matter in the exhaust gas is not easy to block the adsorption pores of the adsorption medium during subsequent adsorption treatment, which is beneficial to the adsorption medium to maintain a high adsorption effect for a long time.

Referring to fig. 1, the adsorption and desorption processes are controlled by the adsorption bed 3 through the control valve 16, and the adsorption bed 3 is of a multi-bed structure, so that the online desorption process can be realized, and the stable standard discharge of the whole system is ensured. The adsorption bed 3 is internally provided with adsorption medium honeycomb activated carbon which is of a blocky structure and is convenient to maintain and replace, the common model is 100 multiplied by 100mm, the wind resistance of the whole system is low, and the operating cost is low.

Referring to fig. 1, a catalytic combustion furnace 11 includes a built-in heat exchanger 17, a heater 18, and a catalytic combustion bed 19, and the catalytic combustion bed 19 carries a catalyst. The heat exchanger 17 is connected with the desorption fan 9, the heat exchanger 17 is connected with the mixer 12, and a combustion pipe 20 and an exhaust gas pipe 21 are connected between the heat exchanger 17 and the combustion bed. The flame arrester 10 is installed between the desorption fan 9 and the heat exchanger 17, so that flame can be prevented from spreading to the adsorption bed 3, and the safety performance of the system can be improved. The catalyst is a honeycomb noble metal catalyst, and the common model is 100 multiplied by 50mm.

Referring to fig. 1, the desorption gas flows through the adsorption bed 3, takes away the harmful gas adsorbed by the adsorption medium, flows to the desorption fan 9 along with the desorption pipeline 8, the desorption gas carrying the high-concentration harmful gas is then sent to the heat exchanger 17 arranged in the catalytic combustion furnace 11 by the desorption fan 9 to be preheated, the desorption gas preheated to 200-300 ℃ enters the catalytic combustion bed 19 through the combustion pipe 20, is heated to about 300 ℃ by the heater 18, is catalyzed to be combusted and converted into high-temperature harmless gas, and then flows back to the heat exchanger 17 through the exhaust pipe 21 to exchange heat with the desorption gas, so that the desorption gas is preheated, and the purpose of saving energy consumption is achieved. The high-temperature harmless gas obtained after combustion and desorption gas are subjected to heat and then enter a mixer 12, and are fully mixed with the outside air to control the temperature of the mixed gas to be 80-100 ℃, and then enter an adsorption bed 3 through a circulating pipeline 13 to desorb the honeycomb activated carbon. The temperature of the mixed gas is controlled to be 80-100 ℃, which is beneficial to reducing the potential safety hazard of easy combustion of the activated carbon.

Referring to fig. 1, the purification system further has a plurality of temperature and pressure sensors, and the online monitoring room 14 and the system control room 15 can monitor and control the system state through the sensors and the online monitors, which is beneficial to ensuring the normal operation of the system.

The implementation principle of the embodiment is as follows: the desorption gas takes away the harmful gas adsorbed by the adsorption medium after flowing through the adsorption bed 3 and is sent to the catalytic combustion furnace 11 by the desorption fan 9, the harmful gas is catalyzed to be combusted and is converted into harmless carbon dioxide and water vapor, the temperature of the carbon dioxide and the water vapor obtained by combustion is higher, the carbon dioxide and the water vapor enter the mixer 12 and are mixed with the outside air to control the temperature of the gas, the mixed gas at a certain temperature is taken as desorption gas and enters the adsorption bed 3 again through the circulating pipeline 13, the desorption cycle is completed, the activated carbon can be recycled by carrying out thermal desorption on the activated carbon, the service life of the activated carbon is prolonged, the replacement frequency of the activated carbon is reduced, and the reduction of the system operation cost is facilitated.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a water paint application exhaust gas purification system which characterized in that: the device comprises an adsorption bed (3), an adsorption fan (5), a desorption fan (9), a catalytic combustion furnace (11), a mixer (12) and a discharge device (7), wherein an adsorption medium is arranged in the adsorption bed (3), the adsorption bed (3) is connected with the adsorption fan (5), and the adsorption bed (3) is communicated with the discharge device (7); a desorption pipeline (8) is connected between the desorption fan (9) and the adsorption bed (3), the desorption fan (9) is connected with the catalytic combustion furnace (11), the catalytic combustion furnace (11) is connected with the flow mixer (12), and a circulating pipeline (13) is connected between the flow mixer (12) and the adsorption bed (3);

the catalytic combustion furnace (11) comprises a heater (18) and a catalytic combustion bed (19), and the catalytic combustion bed (19) carries a catalyst;

the catalytic combustion furnace (11) further comprises a heat exchanger (17), the heat exchanger (17) is connected with the desorption fan (9), the heat exchanger (17) is connected with the flow mixer (12), and a combustion pipe (20) and an exhaust gas pipe (21) are connected between the heat exchanger (17) and the catalytic combustion bed (19);

a flame arrester (10) is arranged between the desorption fan (9) and the catalytic combustion furnace (11).

2. The exhaust gas purification system for water-based paint coating according to claim 1, wherein: the adsorption fan (5) is connected between the adsorption bed (3) and the discharge device (7).

3. The exhaust gas purification system for water-based paint coating according to claim 1, wherein: the inlet of the adsorption bed (3) is connected with a filter (1).

4. The exhaust gas purification system for water-based paint coating according to claim 1, wherein: the adsorption medium is honeycomb activated carbon.