CN206404499U - Lacquer spraying waste gas processing unit - Google Patents

Abstract

The utility model discloses a paint spray waste gas treatment device, which comprises a swirl tower, the swirl tower is provided with a spray device, and the swirl tower is connected with a filtering device and an activated carbon adsorption device in turn, and the swirl tower The air outlet is connected to the air inlet of the filter device, the air outlet of the filter device is connected to the air inlet of the activated carbon adsorption device, and the air outlet of the activated carbon adsorption device is connected to the main exhaust pipe through a centrifugal fan. By adopting the above scheme, after the paint exhaust gas enters the cyclone tower, the exhaust gas can be washed after being fully contacted with the water mist formed by the spraying device, and the large particles and water-soluble exhaust gas in the exhaust gas are removed, and then the remaining gas Enter the filter device for water vapor filtration, dry the exhaust gas, and prevent the undried paint mist from blocking the micropores on the activated carbon in the activated carbon adsorption device, thereby prolonging the use efficiency of activated carbon, reducing the replacement frequency of activated carbon, and reducing costs.

Description

Paint exhaust gas treatment device

technical field

The utility model relates to the technical field of waste gas purification and treatment, in particular to a paint spraying waste gas treatment device.

Background technique

Spraying paint is a very common surface treatment process. Among the paints widely used at present, organic solvents such as benzene, toluene, xylene, and non-methane total hydrocarbons occupy a large proportion. During the process of painting and drying, these organic solvents will volatilize into the air and form air pollution. Existing paint spraying lines are equipped with exhaust devices in the paint spraying room and drying room to discharge the organic matter volatilized in the paint. At present, only a small number of painting lines are designed and installed with waste gas treatment devices, and most of these waste gas treatment devices use adsorption materials to treat organic pollutants.

Chinese patent announcement number CN205145921U discloses a "spray paint waste gas treatment device", including a pretreatment device, a spray tower, an adsorption device, a fan, and a waste gas discharge pipe. , the outlet of the pretreatment device is connected to the inlet of the spray tower, the outlet of the spray tower is connected to the inlet of the adsorption device through the exhaust gas discharge pipe, and the fan is installed at the outlet of the adsorption device. The adsorption device is composed of several adsorption tubes installed in the adsorption tower, and the adsorption tube is made of activated carbon fiber material The adsorption tube is a hollow cylinder structure, the two ends of the hollow cylinder are respectively sealed and fixed on the inner walls of the two sides of the adsorption tower, and the inner cavity of the hollow cylinder is connected with the outlet of the adsorption device.

The above-mentioned "painting exhaust gas treatment device" directly discharges the exhaust gas washed by the spray tower into the adsorption device. Adsorption materials such as activated carbon use the tiny pores on the surface of the material to fix the molecular particles of pollutants, and the exhaust gas from spray painting contains a large amount of The proportion of undried paint mist, which adheres to the surface of the adsorbent material, will block the micropores of the adsorbent material after drying, preventing further adsorption of the adsorbent material. At the same time, because the paint is extremely firm after drying, the adsorbent material cannot be regenerated. Replacement, this method reduces the usage rate of activated carbon, increases the frequency of replacement, and costs a lot.

Utility model content

The purpose of the utility model is to provide a treatment device for spray paint waste gas which is resistant to pollution and has low operating cost.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

A spray paint exhaust gas treatment device, comprising a swirl tower, a spraying device is arranged in the swirl tower, a filter device and an activated carbon adsorption device are connected to the swirl tower in turn, and the air outlet of the swirl tower is connected to a filter device The air inlet of the filter device is connected to the air inlet of the activated carbon adsorption device, and the air outlet of the activated carbon adsorption device is connected to the main exhaust pipe through a centrifugal fan.

By adopting the above scheme, after the paint exhaust gas enters the cyclone tower, the exhaust gas can be washed after being fully contacted with the water mist formed by the spray device, and the large particles and water-soluble exhaust gas in the exhaust gas are removed, and then the remaining gas Enter the filter device for water vapor filtration, dry the exhaust gas, and prevent the undried paint mist from blocking the micropores on the activated carbon in the activated carbon adsorption device, thereby prolonging the use efficiency of activated carbon, reducing the replacement frequency of activated carbon, and reducing costs.

As an improvement of the utility model, the spraying device is connected with a circulating water tank through a circulating water pump, and the circulating water tank is arranged at the bottom of the swirl tower, and an overflow port is provided on the circulating water tank, and the overflow port and The water surface in the circulating water tank is level.

By adopting the above scheme, the spraying device is connected to the circulating water tank through the circulating water pump, and the water in the circulating water tank can be used for a long time, which can effectively reduce the cost. The setting of the overflow port can automatically remove the floating objects on the water surface in the circulating water tank to ensure the circulation The water quality in the tank is good.

As an improvement of the present utility model, the filter device includes a filter box, and several vertical and parallel filter layers are arranged in the filter box, and the filter layers include two parallel stainless steel filter screens and Elastomeric packing between stainless steel screens.

By adopting the above scheme, the water vapor generated by the spraying device can be effectively removed through the filter layer to ensure the drying of the exhaust gas and prevent the undried water vapor from blocking the activated carbon in the subsequent equipment, which will not only block the circulation of the exhaust gas It will also affect the adsorption of organic substances by activated carbon.

As an improvement of the utility model, the bottom of the filter box is a downwardly curved arc surface, and the bottom of the filter box is provided with a water outlet.

By adopting the above scheme, the bottom of the filter box is convenient to collect the filtered water in the exhaust gas, and the water outlet is set at the bottom of the filter box to facilitate the discharge of water and ensure the normal operation of the filter device.

As an improvement of the utility model, the activated carbon adsorption device includes an activated carbon box, and a slant plate is arranged in the activated carbon box corresponding to the air inlet of the activated carbon box, and the rear side of the slant plate is arranged from bottom to top. There are several steel wire cages with open upper ends, and activated carbon layers are arranged in the steel wire cages.

By adopting the above scheme, a sloping plate is installed in the activated carbon box corresponding to the air inlet of the activated carbon box, and the exhaust gas entering from the air inlet will flow down the sloping plate, prolonging the time of the exhaust gas in the activated carbon box. In this way, the exhaust gas is in full contact with the activated carbon, so that the activated carbon can completely absorb the organic substances in the exhaust gas.

As an improvement of the utility model, the two sides of the steel wire mesh box are connected with the activated carbon box through slide rails, and the activated carbon box is located on the opposite side of the air inlet to allow the steel wire mesh box to slide out horizontally. The opening of the steel mesh box is provided with a door panel on one side of the opening direction. When the steel mesh box is completely slid into the activated carbon box, the inner side of the door panel coincides with the outer side of the opening.

By adopting the above scheme, the steel wire mesh box can be easily slid out from the activated carbon box, so as to facilitate the replacement of activated carbon.

As an improvement of the utility model, a handle is provided on the outside of the door panel.

By adopting the above solution, the user can conveniently pull out the steel wire cage through the handle, thereby facilitating the replacement of activated carbon.

In summary, the utility model has the following beneficial effects:

1. A filter device is installed after the cyclone tower, through which the water vapor can be filtered and the exhaust gas can be dried to prevent the undried paint mist from blocking the micropores on the activated carbon, thereby prolonging the use efficiency of activated carbon and reducing the cost of activated carbon. The frequency of replacement reduces costs; the elastic filler in the filter layer in the filter device can effectively remove the moisture in the exhaust gas, ensure the drying of the exhaust gas, and prevent the undried paint mist from blocking the activated carbon in the subsequent equipment, which will not only block the waste gas. Circulation will also affect the adsorption of organic substances by activated carbon; the bottom of the filter box is set as a downward curved arc surface, which is convenient to collect the filtered water in the exhaust gas, and the water outlet is set at the bottom of the filter box to discharge the collected water. , to ensure the normal operation of the filter device;

2. A spraying device is installed in the swirl tower, and the spraying device is connected to the circulating water tank through a circulating water pump, so that the water in the circulating water tank can be used for a long time, which can effectively reduce costs; There is an overflow port, which is flush with the water surface in the circulating water tank, and the overflow port can automatically remove the floating objects on the water surface in the circulating water tank to ensure good water quality in the circulating water tank;

3. A sloping plate is installed in the activated carbon box corresponding to the air inlet of the activated carbon box, and the exhaust gas entering from the air inlet will flow downward along the sloping plate, prolonging the time of the exhaust gas in the activated carbon box, so that the exhaust gas and The activated carbon is in full contact, so that the activated carbon can completely absorb the organic substances in the exhaust gas; the two sides of the steel mesh box are connected with the activated carbon box through slide rails, and the activated carbon box is located on the opposite side of the air inlet to allow the steel mesh box to slide out horizontally The opening of the steel mesh box is provided with a door panel on one side of the opening direction. When the steel mesh box is completely slid into the activated carbon box, the inner side of the door panel coincides with the outer side of the opening, and a handle is provided on the outer side of the door panel. The steel wire cage can be easily pulled out through the handle, so as to facilitate the replacement of activated carbon.

Description of drawings

Fig. 1 is the top view of spray paint exhaust gas treatment device;

Fig. 2 is the structural representation of filtering device;

Fig. 3 is a schematic diagram of the structure of the activated carbon adsorption device;

Figure 4 is an exploded view of the activated carbon adsorption device.

In the figure, 1. Cyclone tower; 2. Filtration device; 201, Filtration box; 202, Filtration layer; 2021, Stainless steel filter screen; 2022, Elastic packing; 203, Water outlet; 3, Activated carbon adsorption device; Box body; 302, inclined plate; 303, steel wire cage; 304, activated carbon layer; 305, slide rail; 306, opening; 307, door panel; 308, handle; 4, centrifugal fan; 5, main exhaust pipe; 6, Circulating water pump; 7, circulating water tank; 701, overflow port.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Example:

Referring to FIG. 1 , a spray paint exhaust gas treatment device includes a cyclone tower 1 , a filter device 2 , an activated carbon adsorption device 3 and a centrifugal fan 4 connected in sequence through pipelines. The air outlet of the cyclone tower 1 is connected to the air inlet of the filter device 2, the air outlet of the filter device 2 is connected to the air inlet of the activated carbon adsorption device 3, and the air outlet of the activated carbon adsorption device 3 is communicated with the main exhaust pipe 5 through the centrifugal fan 4 . The swirl tower 1 is provided with a spraying device, which is composed of a spraying pipeline, a spray rack and a spray head, and the spraying device is connected to a circulating water tank 7 through a circulating water pump 6, and the circulating water tank is arranged at the bottom of the swirling tower 1 , The circulating water tank 7 is also provided with an overflow port 701, and the overflow port 701 is flush with the water surface in the circulating water tank 7.

With reference to Fig. 2, filter device 2 comprises filter box body 201, is provided with two filter layers 202 in filter box body 201, and filter layer 202 comprises two parallel stainless steel filter screens 2021 and elastic filler filled between the stainless steel filter screens 2021 2022. The bottom of the filter box 201 is a downward curved arc, and the bottom of the filter box 201 is provided with a water outlet 203 .

With reference to Fig. 3 and Fig. 4, activated carbon adsorption device 3 comprises activated carbon box body 301, is provided with inclined plate 302 correspondingly with the air inlet of activated carbon box body in activated carbon box body 301, is provided with two vertically on the rear side of inclined plate 302 A steel wire cage 303, filled with activated carbon layer 304 in the steel wire cage 303, slide rails 305 are fixedly connected by screws between the both sides of the steel wire cage 303 and the both sides inner walls of the activated carbon box body 301, and the activated carbon box body 301 is located at The opposite side of the air inlet is provided with an opening 306 that allows the steel wire cage 303 to slide out horizontally. The steel wire cage 303 is welded with a door panel 307 on one side of the opening 306 direction, and the outside of the door panel 307 is connected with a handle 308 by screws.

When it is necessary to treat the exhaust gas from painting, the exhaust gas first enters from the air inlet at the lower part of the swirl tower 1, and then flows upwards. After being guided by the swirl plate in the swirl tower 1, the exhaust gas flows upward in a spiral, and the exhaust gas is flowing. The water mist generated by the spraying device is in full contact with the mist, and after the waste gas is fully washed by the water mist, the large particles and water-soluble waste gas enter the circulating water tank 7 along with the bottom of the swirl tower 1 in the droplet flow channel. The floating objects on the water surface in the recirculating water tank 7 constantly have an overflow port 701 to overflow, and are collected by the waste tank, which needs to be cleaned regularly. The water level in the circulating water tank 7 li is automatically replenished by the water pipe through the float, and keeps a certain liquid level all the time. The water in the circulating water tank 7 is replaced regularly, and the circulating water needs to be discharged to the sewage treatment station after reaching the standard for treatment.

The exhaust gas washed by the cyclone tower 1 enters the filter device 2 through the pipeline, and the exhaust gas passes through two filter layers 202 in sequence, and the mixed water vapor will be filtered out by the elastic filler 2022 in the filter layer 202, and will be filtered at the bottom of the filter box 201 When the moisture reaches a certain level, the moisture can be discharged through the water outlet 203.

The dry exhaust gas flowing out of the filter device 2 continues to flow into the activated carbon adsorption device 3, and the exhaust gas entering from the air inlet of the activated carbon box 301 will first flow downward along the inclined plate 302, and then pass through two steel wire meshes in sequence from bottom to top The activated carbon layer 304 in the box 303, after the activated carbon in the activated carbon layer 304 is in full contact with the exhaust gas, can absorb impurities and organic substances in the exhaust gas, and finally the treated exhaust gas is discharged from the centrifugal fan 4 to the main exhaust pipe 5 and passed through the chimney at high altitude emission.

After using for a period of time, after the activated carbon in the activated carbon layer 304 reaches saturation, the steel wire mesh box 303 can be extracted from the activated carbon box body 301 through the slide rail 305, thereby facilitating the replacement of activated carbon and ensuring the normal operation of the paint spraying exhaust gas treatment device.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (7)

1. A spray paint exhaust gas treatment device, comprising a swirl tower (1), characterized in that a spraying device is provided in the swirl tower (1), and the swirl tower (1) is sequentially connected with filter device (2) and activated carbon adsorption device (3), the gas outlet of the cyclone tower (1) is connected to the inlet of the filter device (2), and the gas outlet of the filter device (2) is connected to the activated carbon adsorption device The air inlet of (3) and the air outlet of the activated carbon adsorption device (3) are connected with the main exhaust pipe (5) through the centrifugal fan (4). 2. The paint spray exhaust gas treatment device according to claim 1, characterized in that, the spraying device is connected to a circulating water tank (7) through a circulating water pump (6), and the circulating water tank (7) is arranged in a cyclone tower ( 1) Bottom, the circulating water tank (7) is provided with an overflow port (701), and the overflow port (701) is flush with the water surface in the circulating water tank (7). 3. The paint spray exhaust gas treatment device according to claim 1, characterized in that, the filter device (2) includes a filter box (201), and several vertical and parallel filters are arranged in the filter box (201). A filter layer (202), the filter layer (202) comprising two parallel stainless steel filter screens (2021) and elastic packing (2022) arranged between the stainless steel filter screens (2021). 4. The paint spray exhaust gas treatment device according to claim 3, characterized in that, the bottom of the filter box (201) is a downward curved arc surface, and the bottom of the filter box (201) is provided with a water outlet (203). 5. The paint spray exhaust gas treatment device according to claim 1, characterized in that, the activated carbon adsorption device (3) includes an activated carbon box (301), and the activated carbon box (301) is connected with the activated carbon box (301) A slant plate (302) is provided at the corresponding position of the air inlet, and the rear side of the slant plate (302) is provided with several steel wire cages (303) with upper openings from bottom to top, and the steel wire cage (303) is equipped with There is an activated carbon layer (304). 6. The paint spray exhaust gas treatment device according to claim 5, characterized in that, the two sides of the steel mesh box (303) and the activated carbon box (301) are connected by slide rails (305), and the The activated carbon box (301) is located on the opposite side of the air inlet and has an opening (306) that allows the steel wire mesh box (303) to slide out horizontally, and the steel mesh box (303) is provided with a door panel ( 307), when the wire mesh box (303) is completely slid into the activated carbon box (301), the inner side of the door panel (307) coincides with the outer side of the opening (306). 7. The paint spray exhaust gas treatment device according to claim 6, characterized in that a handle (308) is provided on the outer side of the door panel (307).