Coating waste gas treatment equipment

Abstract

The utility model relates to coating waste gas treatment equipment which comprises a waste gas inlet, a condenser, a dry filter, an adsorption box device with a low-temperature catalytic combustion desorption device and a main exhaust fan from head to tail, the condenser is connected and matched with a heat dissipation device; the adsorption box device is provided with a high-concentration organic gas exhaust passage and a hot air inlet passage, the hot air inlet passage is communicated with an air outlet passage of the low-temperature catalytic combustion desorption device, and the high-concentration organic gas exhaust passage is communicated with an air inlet of the low-temperature catalytic combustion desorption device. The device has the beneficial effects that the molecular sieve is desorbed without a nitrogen heating system, and self-circulating hot air is adopted, so that the whole device is relatively small in size, and organic waste gas is finally decomposed and combusted thoroughly through layer-by-layer filtration and layer-by-layer concentration.

Description

Technical Field

[0001] The utility model relates to waste gas treatment equipment, in particular to low-concentration organic coating waste gas treatment equipment. Background Art

[0002] The production processes of automobiles, engineering machinery, home appliances, shoemaking, plastics and various coatings will produce low-concentration organic waste gas during the production process. If these low-concentration organic waste gas emissions are not effectively treated, they will pollute the environment, affect air quality, and pose potential risks to human health. Therefore, appropriate treatment technology and equipment are needed to treat these low-concentration organic waste gases.

[0003] In the practice of treating low-concentration organic waste gas, adsorption concentration and catalytic combustion technology has been widely used. However, this technical route has some shortcomings, such as the large space occupied by the equipment and the relatively cumbersome operation process. In addition, this technology usually requires the use of heated nitrogen for desorption operations, which requires the support of auxiliary facilities such as steam and nitrogen, resulting in a long construction period. Therefore, this method is more suitable for enterprises with larger scale and complete supporting facilities. For enterprises that urgently need to solve the problem of waste gas treatment, have limited space or lack the necessary public utility support, this method has certain limitations. Utility Model Content

[0004] In order to overcome the shortcomings of existing low-concentration organic coating waste gas equipment that occupies a large space and has a relatively complicated operation process, the utility model provides a coating waste gas treatment device.

[0005] The technical solution of the utility model to solve its technical problems is: a coating waste gas treatment equipment, which includes a waste gas inlet, a condenser, a dry filter, an adsorption box device with a low-temperature catalytic combustion desorption device, and a main exhaust fan from beginning to end; the condenser is connected and matched with a heat dissipation device; the adsorption box device has a high-concentration organic gas exhaust duct and a hot air inlet duct, the hot air inlet duct is connected to the outlet duct of the low-temperature catalytic combustion desorption device, and the high-concentration organic gas exhaust duct is connected to the air inlet of the low-temperature catalytic combustion desorption device.

[0006] A preferred heat dissipation device comprises an evaporator and a compression motor.

[0007] The adsorption box device is preferably a molecular sieve adsorption fixed bed.

[0008] A preferred molecular sieve adsorption fixed bed, wherein an adsorption box is arranged outside the molecular sieve adsorption fixed bed, and an air flow distributor, a fire sprinkler pipe, a molecular sieve adsorption layer and a valve are arranged in the molecular sieve adsorption fixed bed.

[0009] Furthermore, the molecular sieve adsorption layer of the molecular sieve adsorption fixed bed is loaded in a drawer-type structure.

[0010] In order to improve the safety of the molecular sieve adsorption fixed bed during operation, the molecular sieve adsorption fixed bed also includes a safety system, which is composed of a bursting disc device and a fire water sprinkler device installed on the adsorption box.

[0011] A preferred dry filter adopts a primary filter bag F5 and a high efficiency filter bag F7.

[0012] In order to facilitate the maintenance of the adsorption box device, an inspection platform is also included, and the inspection platform is located on one side of the adsorption box device.

[0013] A low-temperature catalytic combustion and desorption device is preferably selected, and the low-temperature catalytic combustion and desorption device comprises a heating chamber and a catalytic bed, wherein the heating chamber is provided with an electric heating tube for heating high-concentration organic gas.

[0014] In order to improve safety, the low-temperature catalytic combustion desorption device is also provided with a molded pressure relief hole type explosion-proof device.

[0015] When the utility model is in use, the organic waste gas is guided by the main exhaust fan from the waste gas inlet through the pretreatment equipment and the adsorption bed, and is discharged after being purified by molecular sieve adsorption to ensure the stability of the system operation. The organic waste gas is first removed from the waste gas by condensation and temperature removal and dry filtration devices to remove dust and impurities, otherwise direct adsorption will block the micropores of the molecular sieve, thereby affecting the adsorption effect or even failure. After preliminary filtration, the relatively pure organic waste gas passes through the molecular sieve adsorption layer, and the organic matter is trapped inside by the unique force of the molecular sieve, and the clean gas is discharged; before the molecular sieve tends to be saturated, the organic matter adsorbed in the molecular sieve is desorbed from the molecular sieve by high-temperature gas at a certain temperature, and the desorbed organic waste gas with a high concentration of about ten times is treated by a catalytic combustion process. After treatment, the clean gas is transported to the adsorption bed through the desorption fan to provide heat energy for the molecular sieve desorption, and this cycle is repeated until the organic gas adsorbed in the molecular sieve is completely decomposed.

[0016] The beneficial effects of the utility model are as follows: 1. There is no nitrogen heating system to desorb the molecular sieve, but self-circulating hot air is used. The whole device is relatively small in size, and the organic waste gas is filtered and concentrated layer by layer, and finally decomposed and burned cleanly. 2. The adsorption unit adopts a drawer-type structure to ensure that each layer of filler can be replaced easily and quickly. 3. A maintenance platform is also provided on one side of the adsorption box device, which can facilitate workers to carry out daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] Combined with Figure 1 , a coating waste gas treatment equipment, including a waste gas inlet 1, a condenser 2, a dry filter 3, an adsorption box device 5 with a low-temperature catalytic combustion desorption device 4, and a main exhaust fan 6 from beginning to end; the condenser 2 is connected and matched with a heat dissipation device 7; the adsorption box device 5 has a high-concentration organic gas exhaust duct and a hot air inlet duct, the hot air inlet duct is connected to the outlet duct of the low-temperature catalytic combustion desorption device 4, and the high-concentration organic gas exhaust duct is connected to the air inlet of the low-temperature catalytic combustion desorption device 4.

[0020] A preferred heat dissipation device 7 is an evaporator and a compression motor.

[0021] The adsorption box device 5 is preferably a molecular sieve adsorption fixed bed.

[0022] A preferred molecular sieve adsorption fixed bed, wherein an adsorption box is arranged outside the molecular sieve adsorption fixed bed, and an air flow distributor, a fire sprinkler pipe, a molecular sieve adsorption layer and a valve are arranged in the molecular sieve adsorption fixed bed.

[0023] Furthermore, the molecular sieve adsorption layer of the molecular sieve adsorption fixed bed is loaded in a drawer-type structure.

[0024] In order to improve the safety of the molecular sieve adsorption fixed bed during operation, the molecular sieve adsorption fixed bed also includes a safety system, which is composed of a bursting disc device and a fire water sprinkler device installed on the adsorption box.

[0025] A preferred embodiment of a dry filter 3, wherein the dry filter 3 uses a primary filter bag F5 and a high efficiency filter bag F7.

[0026] In order to facilitate maintenance of the adsorption box device 5 , an inspection platform 8 is also included, and the inspection platform 8 is located at one side of the adsorption box device 5 .

[0027] The low-temperature catalytic combustion desorption device 4 is preferably selected, and the low-temperature catalytic combustion desorption device 4 comprises a heating chamber and a catalytic bed, and an electric heating tube for heating high-concentration organic gas is arranged in the heating chamber.

[0028] In order to improve safety, the low-temperature catalytic combustion desorption device 4 is also provided with a molded pressure relief hole type explosion-proof device.

[0029] In this embodiment, when in use, the organic waste gas is guided by the main exhaust fan 6 from the waste gas inlet 1 through the pretreatment equipment and the adsorption bed, and is discharged after being purified by molecular sieve adsorption to ensure the stability of the system operation. The organic waste gas is first removed from the waste gas by condensation and temperature removal, and the dry filtration device removes the dust and impurities in the waste gas, otherwise direct adsorption will block the micropores of the molecular sieve, thereby affecting the adsorption effect or even failure. After preliminary filtration, the relatively pure organic waste gas passes through the molecular sieve adsorption layer. The organic matter is trapped inside by the unique force of the molecular sieve, and the clean gas is discharged; before the molecular sieve tends to be saturated, the organic matter adsorbed in the molecular sieve is desorbed from the molecular sieve by a high-temperature gas at a certain temperature, and the desorbed organic waste gas with a high concentration of about ten times is treated by a catalytic combustion process. After treatment, the clean gas is transported to the adsorption bed through the desorption fan to provide heat energy for the molecular sieve desorption, and this cycle is repeated until the organic gas adsorbed in the molecular sieve is completely decomposed.

[0030] The beneficial effects of the utility model are as follows: 1. There is no nitrogen heating system to desorb the molecular sieve, but self-circulating hot air is used. The whole device is relatively small in size, and the organic waste gas is filtered and concentrated layer by layer, and finally decomposed and burned cleanly. 2. The adsorption unit adopts a drawer-type structure to ensure that each layer of filler can be replaced easily and quickly. 3. A maintenance platform is also provided on one side of the adsorption box device, which can facilitate workers to carry out daily maintenance.

Claims

1. A coating waste gas treatment device, characterized in that: From beginning to end, it includes an exhaust gas inlet, a condenser, a dry filter, an adsorption box device with a low-temperature catalytic combustion desorption device, and a main exhaust fan; the condenser is connected and matched with a heat dissipation device; the adsorption box device has a high-concentration organic gas exhaust duct and a hot air inlet duct, the hot air inlet duct is connected to the air outlet duct of the low-temperature catalytic combustion desorption device, and the high-concentration organic gas exhaust duct is connected to the air inlet of the low-temperature catalytic combustion desorption device.

2. The coating waste gas treatment equipment according to claim 1, characterized in that: The heat dissipation device is an evaporator and a compression motor.

3. The coating waste gas treatment equipment according to claim 1, characterized in that: The adsorption box device is a molecular sieve adsorption fixed bed.

4. The coating waste gas treatment equipment according to claim 3, characterized in that: An adsorption box is arranged outside the molecular sieve adsorption fixed bed, and an air flow distributor, a fire sprinkler pipe, a molecular sieve adsorption layer and a valve are arranged in the molecular sieve adsorption fixed bed.

5. The coating waste gas treatment equipment according to claim 4, characterized in that: The molecular sieve adsorption layer of the molecular sieve adsorption fixed bed is loaded with a drawer-type structure.

6. The coating waste gas treatment equipment according to claim 4, characterized in that: The molecular sieve adsorption fixed bed also includes a safety system, which is composed of a bursting disc device and a fire water spray device installed on the adsorption box.

7. The coating waste gas treatment equipment according to claim 1, characterized in that: The dry filter adopts primary filter bag F5 and high efficiency filter bag F7.

8. The coating waste gas treatment equipment according to claim 1, characterized in that: It also includes a maintenance platform, which is located on one side of the adsorption box device.

9. The coating waste gas treatment equipment according to claim 1, characterized in that: The low-temperature catalytic combustion desorption device comprises a heating chamber and a catalytic bed. An electric heating tube for heating high-concentration organic gas is arranged in the heating chamber.

10. The coating waste gas treatment equipment according to claim 1, characterized in that: The low-temperature catalytic combustion desorption device is also provided with a molded piece pressure relief hole type explosion-proof device.

Images