KR102068067B1 - Exhaust System for Painting Booth - Google Patents

Abstract

The purpose of the present invention is to provide an exhaust system for a painting booth, in which almost all of environmental pollutants (harmful substances) in the air that are discharged from the painting booth can be removed by being passed through an andrea filter, a pre-filter, an activated-carbon filter, and a carbon filter. The exhaust system for a painting booth, which is provided on one side of the painting booth to be connected thereto, thereby purifying and discharging environmental pollutants generated during painting, comprises: a body connectable to the exhaust system for a painting booth and having an air inlet formed in a lower portion thereof; an exhaust unit connectively installed inside the body and suctioning the air including the environmental pollutants generated during the painting to the inside of the body through the air inlet to circulate the air from the lower portion to an upper portion of the body and exhaust the air; and a filter unit having filters installed inside the body adjacent to the air inlet to filter the environmental pollutants included in the air circulated and filtered from the lower portion to the upper portion of the body by the exhaust unit.

Description

Exhaust System for Painting Booth

The present invention relates to an exhaust system for a paint booth, and more particularly, to remove almost all of the environmental pollutants (harmful substances) in the air discharged from the paint booth through a Andrea filter, a pre-filter, an activated carbon filter, and a carbon filter. The present invention relates to an exhaust system for a paint booth.

In general, the painting work of the coating (塗裝 作業) is done in an isolated coating booth.

The coating booth is designed to prevent environmental pollutants from being discharged by installing environmental facilities for removing gases (volatile organic solvents such as thinners) and dust generated during the painting process, such as an air purifier and an exhaust means.

That is, the grating is provided at the bottom of the coating booth so that the air moves from the top to the bottom, and the organic gas and dust generated during the coating are collected at the grating bottom, and odor, fine dust, etc. are filtered while passing through the air purifier. Emissions to the atmosphere.

However, when the activated carbon constituting the air purifier is saturated, not only can it lead to fire due to the high volatility of the thinner, but also pollutes the surrounding environment as the environmental pollutants are discharged to the outside, thereby treating the environment other than the air purifier. There is a problem such as a separate device is required.

Domestic Patent Registration No. 10-1225634, Environment-friendly air supply / exhaust system of automobile paint booth. Korean Patent Registration No. 10-1894363, Filtration system and method for paint booth. Utility Model Registration No. 20-0127024, Paint Dust Adsorption Filter. Korean Utility Model Registration No. 20-0397612, Side-exhaust type wet painting booth device.

The present invention has been made to solve the above problems of the prior art, an object of the present invention is to pass environmental pollutants (harmful substances) in the air discharged from the coating booth through the Andrea filter, pre-filter, activated carbon filter and carbon filter The present invention provides an exhaust system for a paint booth that can be almost completely removed.

In addition, the present invention is to provide an exhaust system for the coating booth that is provided with each filter integrally inside the body to minimize the space occupancy, and is easy to clean because no separate auxiliary equipment is required, and maintenance and operation costs can be reduced. To provide.

The present invention for achieving the above object, is provided on one side to be connected to the coating booth exhaust system for the coating booth to purify and discharge the environmental pollutants generated during painting, the air inlet that can be connected to the exhaust system of the coating booth A body provided to be formed below; An exhaust unit installed in contact with the inside of the body and configured to suck air containing environmental pollutants generated during painting into the inside of the body through the air inlet and circulate and exhaust air from the bottom of the body to the top; And a filter unit installed inside the body adjacent to the air inlet so as to filter and filter environmental pollutants contained in the air circulated and exhausted from the lower part of the body to the upper part by the exhaust unit. Preferably, the filter unit and the exhaust unit are installed in the body.

The filter unit may include: an Andrea filter installed inside the body to be adjacent to an air inlet formed at the bottom of the body; A free filter installed inside the body to be spaced apart by a predetermined distance adjacent to an upper portion of the Andrea filter; An activated carbon filter installed inside the body to be spaced apart by a predetermined distance adjacent to an upper portion of the pre-filter; And a carbon filter installed inside the body so as to be spaced apart by a predetermined distance adjacent to the upper portion of the activated carbon filter, wherein the exhaust unit is installed to be disposed above the carbon filter to provide the air inlet. It is preferable that the air flowing in through the Andrea filter, the pre-filter, the activated carbon filter, and the carbon filter are filtered while being sequentially circulated from the lower part of the body to the upper part.

The filter unit may include: each filter may be detachably installed inside the body, and filter inspection doors may be installed to open and close to correspond to the respective filters on the front of the body to replace and inspect the respective filters. Do.

The exhaust unit is installed to be disposed above the filter unit and is provided to contact the inside and the outside of the body to suck air in the paint booth into the interior of the body through the air inlet and circulate from the bottom of the body to the top. An exhaust fan for exhausting; An exhaust duct installed outside to be connected to the exhaust fan to exhaust air to the outside; And a damper installed in the exhaust duct to adjust the displacement.

The exhaust unit: an exhaust fan is installed on the inner upper side of the body, it is preferable that the exhaust fan inspection door is installed on the front of the body so as to correspond to the exhaust fan.

It is preferable that the internal inspection doors are further provided on the body so as to correspond to the filter inspection doors and the exhaust fan inspection door.

The prefilter is installed in a zigzag shape in the left and right direction, the activated carbon filter is preferably installed in a tower shape with a predetermined interval in the left and right directions.

According to the exhaust system for the coating booth according to the present invention, by installing the exhaust unit and the filter unit in the interior of the body can minimize the installation space and occupied space, and includes various gases and dust generated during painting work The exhaust air can be removed by almost all environmental pollutants (harmful substances) in the exhaust air through the fourth filtration process.

1 is a side cross-sectional view showing a structure of the present invention,
Figure 2 is a front sectional view showing a structure of the present invention,
3 is an exploded perspective view showing the structure of the present invention,
Figure 4 is a perspective view showing only the body in the configuration of the present invention,
5 is a view for explaining the principle of inertia of the Andrea filter in the present invention,
Figure 6 is a graph of the loading of the Andrea filter and the general nonwoven fabric in the present invention,
7 is a view showing an inertial separation state of the Andrea filter in the present invention,
Figure 8 is a reference picture immediately before replacing the Andrea filter in the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Prior to the description of the present invention, the following specific structures or functional descriptions are merely illustrated for the purpose of describing embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. It should not be construed as limited to the embodiments set forth herein.

In addition, the embodiment according to the concept of the present invention may be variously modified and may have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

1 is a side cross-sectional view showing the structure of the present invention, Figure 2 is a front sectional view showing the structure of the present invention, Figure 3 is an exploded perspective view showing the structure of the present invention, Figure 4 is a body in the configuration of the present invention 5 is a perspective view showing only, Figure 5 is a view illustrating the inertia principle of the Andrea filter in the present invention, Figure 6 is a graph of the loading capacity of the Andrea filter and the general nonwoven fabric in the present invention, Figure 7 is an inertial separation state of the Andrea filter in the present invention 8 is a reference picture immediately before replacing the Andrea filter in the present invention.

As shown in these drawings, the present invention is provided on one side to be connected to the paint booth, the exhaust system for the paint booth to purify and discharge the environmental pollutants generated during painting, the body 10 and the exhaust unit 20 and It is preferable that the filter unit 30 is included.

The body 10 is formed in a box shape, it is preferable that the air inlet 12 that can be connected to the exhaust system of the paint booth is formed to be formed below. That is, the body 10 is preferably formed so that the lower opening is formed with an air inlet 12 through which air can be introduced.

The body 10 is a frame is installed to form a rectangular frame, it is preferable that the side plates are fixed to the frame to form an enclosure.

In addition, the exhaust unit 20 is installed to be in contact with the interior of the body 10, the air containing the environmental pollutant generated during the coating is sucked into the interior of the body 10 through the air inlet 12 It is preferably configured to circulate and exhaust from the lower portion to the upper portion of the body (10).

The exhaust unit 20 is installed to be disposed above the filter unit 30, and is provided to contact the inside and outside of the body 10 is the air in the paint booth through the air inlet 12 to the body ( An exhaust fan 22 is installed to circulate and exhaust the lower portion of the body 10 from the lower portion of the body 10, and an exhaust duct 24 is installed to be connected to the exhaust fan 22 to provide air. Exhaust to the outside, the exhaust duct 24 is preferably provided with a damper 26 is configured to adjust the displacement.

At this time, the exhaust fan 22 is preferably a sirocco fan, etc., the fan motor 28 is provided to rotate the exhaust fan 22, the fan motor 28 is rotated by the control means It is preferable that an inverter motor or the like having a variable speed is used, and the rotating force is transmitted by a power transmission means such as a chain, a belt or a gear.

On the other hand, the filter unit 30 is adjacent to the air inlet 12 to filter and filter the environmental pollutants contained in the air circulated and exhausted from the bottom to the top of the body 10 by the exhaust unit 20 It is preferable that filters are installed inside the body 10.

The filter unit 30 includes an Andrea filter 32 installed inside the body 10 so as to be adjacent to an air inlet 12 formed in the lower portion of the body 10, and the Andrea filter. A free filter 34 installed inside the body 10 to be spaced apart by a predetermined interval adjacent to the upper portion of the 32 and spaced apart by a predetermined distance adjacent to the upper portion of the prefilter 34. Activated carbon filter 36 installed inside the body 10, and a carbon filter installed inside the body 10 so as to be spaced apart by a predetermined distance adjacent to an upper portion of the activated carbon filter 36 ( 38).

At this time, the pre-filter 34 is installed in a zigzag shape in the left and right direction, the activated carbon filter 36 is preferably installed in a tower shape with a predetermined interval in the left and right directions.

In addition, each filter of the filter unit 30 is preferably made of a plate shape installed in a direction orthogonal to the flow of the exhaust air.

According to the present invention, the exhaust unit 20 is installed to be disposed above the carbon filter 38 so that air introduced through the air inlet 12 is circulated and exhausted from the lower portion of the body 10 to the upper portion. In the process, the Andrea filter 32 and the pre-filter 34, the activated carbon filter 36 and the carbon filter 38 is preferably to be filtered while passing sequentially, the present invention is a filter inside the body (10) It is characterized in that the unit 30 and the exhaust unit 20 is installed.

Meanwhile, the Andrea filter 32 and the pre-filter 34, the activated carbon filter 36, and the carbon filter 38 are detachably installed in the body 10 in which the filter unit 30 is installed. In order to replace and inspect the filters, it is preferable that the filter inspection doors 14 are installed on the front of the body 10 so as to correspond to the filters. These filter checks 14 make it easy to replace or detach the filter.

In addition, the exhaust fan 22 of the exhaust unit 20 is installed on the inside of the upper body 10, the exhaust fan check door 16 on the front of the body 10 to correspond to the exhaust fan 22 It is preferable to be provided so that opening and closing is possible.

At this time, it is preferable that the internal inspection doors 18 are further provided on the body 10 so as to correspond to the filter inspection doors 14 and the exhaust fan inspection door 16. That is, the double check door is provided to completely block the inside and outside of the body 10 to increase the filtration efficiency.

According to the present invention, since the filter unit 30 and the exhaust unit 20 are installed inside the body 10, the occupied space can be minimized, and the environment such as gas, dust generated during painting work The pollutants are filtered and discharged through the respective filters by the rotation of the exhaust fan 22. That is, the air filter in the paint booth is sucked into the air inlet 12 of the body 10 by the suction force of the exhaust fan 22 and is circulated and exhausted from the lower part of the body 10 to the upper part of the Andrea filter ( 32, the pre-filter 34, the activated carbon filter 36, and the carbon filter 38, almost all of the environmental pollutants are filtered out and then discharged to the outside through the exhaust duct 24.

Therefore, in the present invention, environmental pollutants (harmful substances) generated in the paint booth undergo a four-stage filtration process by a four-stage filter in the process of circulating from the lower part of the body 10 to the upper part by the exhaust fan 22. Almost all of them are removed.

In the present invention, the Andrea filter used to filter the environmental pollutants for the first time is composed of paper, which is the most environmentally friendly filter that is easy to use, and is mainly used in an environment requiring less spraying.

FIG. 5 shows that the Andrea Filter is filtered according to the principle of inertia. The air flow containing paint particles (over spray) is heavier than air while passing through several radical redirection. Move in a straight line to the airflow. Therefore, the paint particles collect in the holding pockets and the airflow passes through the Andrea filter almost completely out of the overspray. As a result, very few paint particles escape to the atmosphere.

In other words, the escape of paint particles into the air is common when slow-drying coatings are used with mesh filters. At this time, the air stream will push out the paint particles already trapped in the net and eventually the already loaded paint particles will exit the device again and float in the atmosphere. Using a Andrea filter, on the other hand, will cause the paint particles to escape the air flow and fill the holding pocket of the back wall.

Therefore, the working environment is improved and the activated carbon contained in the environmental equipment is protected, and the holding time of the Andrea filter is increased because of the higher holding capacity.

In addition, when volatile organic solvents such as thinner are accumulated and saturated, only the corresponding filter needs to be replaced, so there is no risk of fire, and no environmental pollutants are discharged to the outside. The savings are achieved. That is, the replacement time of the Andrea filter is longer, thereby reducing the replacement cost and time, reducing waste and improving the painting efficiency.

In addition, the Andrea filter has an overspray caught by the filter due to inertia separation, and the airflow is biased outward in the holding pocket HP. The larger the holding pocket, the better the holding ability of the filter. If the Andrea Depth has a holding depth of 65 cm, the holding pocket is 4 to 8 times better than a normal nonwoven fabric (net filter). This means that the service life is four to eight times longer than other filters.

In addition, while the Andrea filter is still loaded with paint, the airflow remains in its initial state and is blocked only when it is full, while ordinary nonwovens (net filters) are quickly loaded and do not apply deeply to the paint. It is blocked quickly.

Figure 6 shows that the Andrea filter is used longer than the nonwoven fabric containing both the mesh filter and the FRE FILTER.

This shows better holding capacity and more stable resistance while using the filter.

And, the Andrea filter is stable to static pressure. Static pressure gradually increases as the paint is loaded and has two advantages.

First, the worker can work in clean air and environment, and the air quality around the workpiece is kept constant, so the painting quality is improved.

Second, the Andrea filter is composed of an asymmetric label with a collapsible accordion structure to apply the high efficiency and low cost inertial principle. The location of the holes causes the airflow to change in three axial directions. Enumerating the advantages of the accordion structure allows for optimal inertial separation.

The front wall of the V-shaped filter as shown in FIG. 8 prevents the overspray from splashing back. The back wall is deeper V-shaped and the holding pocket part of the filter. The holes are arranged along the center of the front wall and the sides of the rear wall as shown in FIG. 8, and the rear holes do not coincide in line with the front holes. This structure results in the most effective redirection and the best inertial separation.

Also, the accordion shape of the Andrea filter concentrates a large number of holes per square meter, even though the holes are located in each pleat. This principle serves to lower static pressure. Andrea's filter is made of about 240 g of corrugated paperboard per square meter. As a result, the Andrea filter has high strength and has four advantages.

First, the Andrea filter is not affected by suction by air pressure. On the other hand, in the case of nonwoven fabrics, additional equipment is needed to prevent the filter from being sucked in.

Second, the Andrea filter does not collapse more when a lot of paint is loaded. On the other hand, non-woven fabrics and non-genuine Andrea filters will collapse even with a small amount of paint.

Third, the Andrea filter is simple because it requires a simple frame, not a nailed grate. Other filters, such as nonwovens, on the other hand, require complex equipment because of the risk of collapse due to low strength.

Fourth, the frame (frame) constituting the Andrea filter is shaped like a U or L shape to support the weight by the force of the Andrea filter itself, it can be a perfect seal when the filter is properly installed.

In addition, in the case of nonwoven fabrics, incineration is difficult and causes serious environmental pollution, while the inventive Andrea filter is made of paper, and recycled paper can be used and can be easily incinerated or recycled, thereby being environmentally friendly.

In addition, in the present invention, the pre-filter filtered after the Andrea filter is a non-woven fabric of a polyester resin system, and the tissue is a three-dimensional structure in the form of a scouring pad, and has a very high dust collection efficiency. It has heat resistance.

Non-woven fabric is a product of adhesive heat processing with low pressure loss by giving a density gradient to polyester, which is most often used as a pre filter media, and non-woven with air inflow surface. It is an ideal filter with different densities on the outlet side. And it can be reproduced and can be used for a long time.

On the other hand, the activated carbon filter and the carbon filter (Carbon filter) is composed of activated carbon (Carbon). The activated carbon is an aggregate of well-developed amorphous carbon made of wood, lignite, anthracite and palm bark as raw materials, and an adsorbent that has a large internal surface area by forming fine pores of a molecular size during activation. to be.

The adsorbent may have a surface area of 1,000 m 2 or more per g, but a functional group of carbon atoms present on the surface adsorbs molecules of the adsorbate by attracting the surrounding liquid or gas, and in the present invention, activated carbon using activated carbon fibers ( ACF) filter is used.

Activated carbon fiber (or fibrous activated carbon) has a fiber diameter of 5 to 20 μm, and is manufactured by the same method as conventional activated carbon. In principle, the carbonized reaction of fibrous carbon with steam and carbon dioxide gas at a high temperature of 800 ° C. or higher, so-called By activation reaction.

Activated carbon fiber (ACF) is mainly made of acryl, cellulose, and phenol (nobroc) resin based carbon fibers, and is made through carbonization and activation after pretreatment for each fiber. Unlike granular or powdered activated carbon, it is fibrous and can be used in various forms such as felt, cloth, sheet, and the like. In addition, since the fibrous activated carbon is generally composed of 5 ~ 10 미세 micropores on average, it has a number of advantages over activated carbon currently used as an excellent adsorbent.

Activated carbon fiber is composed of fine pores most of the pores (comfortable pores), the diameter of the fiber and the size of the developed adsorption pores are relatively uniform, making it easy to regenerate, and because the fine pores are directly exposed to the outer surface of the diffusion path Is very short, the speed of the adsorbent material is very fast.

The granular activated carbon has a slow adsorption rate because it needs to undergo diffusion or capillary action in the macropore or mesopore to adsorb the adsorbate, whereas the fibrous activated carbon of the present invention has a micropore on the surface. Not only are all exposed, but also penetrates into each other, so the adsorbate is immediately filled, so the amount of adsorption is high and the adsorption rate is fast.

Table 1 below compares the odor removal ability of fibrous activated carbon by time (5 minutes, 15 minutes, 30 minutes, 60 minutes) for ammonia, trimethylamine, acetaldehyde, acetic acid, and 5 for ammonia, trimethylamine, acetic acid. More than 90% of the time, most of them were deodorized.

      Odor removal ability table of fibrous activated carbon Kinds 5 min 15 min 30 min 60 min Ammonia 92.5% 93.2% 94.9% 95.3% Trimethylamine 91.1% 92.4% 93.6% 95.0% Acetaldehyde 91.7% 92.2% 73.1% 74.0% Acetic Acid 90.0% 92.5% 93.3% 93.3%

According to the present invention, since the air is exhausted in four stages, which is integrally formed inside the body 10, the gas and dust generated when spraying the paint on the product are almost completely removed. In other words, the paint is first filtered through an Andrea filter, the volatile organic solvents such as thinner and the like are pre-filtered by secondary and third absorption filters, and the volatile organic solvents in the air discharged through the activated carbon filter and carbon filter. And almost all of the gases, dusts, and the like are filtered.

Therefore, the present invention can almost completely remove the environmental pollutants such as dust and gas generated by the painting work through the fourth filtration process, the cleaning work is very easy, and maintenance and operation costs can be reduced do.

The technical problem of the present invention is achieved by the technical configuration as described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto but by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the technical spirit and equivalents of the claims to be described below.

10-Body 12-Air Inlet
20-Exhaust Unit 30-Filter Unit
32-Andrea Filter 34-Pre Filter
36-Activated Carbon Filter 38-Carbon Filter

Claims (7)

In the exhaust system for the coating booth provided on one side to be connected to the painting booth to purify and discharge the environmental pollutants generated during painting,
A body provided to form an air inlet that can be connected to an exhaust system of the painting booth at a lower portion thereof;
An exhaust unit installed in contact with the inside of the body and configured to suck air containing environmental pollutants generated during painting into the interior of the body through the air inlet port and circulate and exhaust the air from the bottom of the body; And
And a filter unit installed inside the body adjacent to the air inlet to filter and filter environmental pollutants contained in the air circulated and exhausted from the lower part of the body to the upper part by the exhaust unit.
The filter unit and the exhaust unit is installed inside the body,
The filter unit may include: an Andrea filter installed inside the body to be adjacent to an air inlet formed at the bottom of the body; A free filter installed inside the body to be spaced apart by a predetermined distance adjacent to an upper portion of the Andrea filter; An activated carbon filter installed inside the body to be spaced apart by a predetermined distance adjacent to an upper portion of the pre-filter; And a carbon filter installed inside the body to be spaced apart by a predetermined distance adjacent to the upper portion of the activated carbon filter.
The exhaust unit is installed to be disposed above the carbon filter, and the Andrea filter, the pre-filter, the activated carbon filter, and the carbon filter are sequentially disposed in the process of circulating and exhausting air introduced through the air inlet from the lower part of the body. Filtered through,
The filter unit may include: each filter is detachably installed inside the body, and filter inspection doors are installed to be opened and closed to correspond to the respective filters on the front of the body to replace and inspect each filter,
The exhaust unit: exhaust system for the paint booth, characterized in that the exhaust fan is installed on the upper side of the inside of the body, the exhaust fan inspection door is installed on the front of the body so as to correspond to the exhaust fan.
delete delete The method of claim 1,
The exhaust unit is:
An exhaust fan installed to be disposed above the filter unit and provided to contact the inside and the outside of the body to suck air in the painting booth into the interior of the body through the air inlet and circulate and exhaust the air from the bottom of the body to the top;
An exhaust duct installed outside to be connected to the exhaust fan to exhaust air to the outside; And
And a damper installed in the exhaust duct to control the exhaust volume.
delete The method of claim 1,
And an internal inspection door on the body to correspond to the filter inspection doors and the exhaust fan inspection door.
The method of claim 1,
The pre-filter is installed in a zigzag shape in the left and right direction, the activated carbon filter is an exhaust system for the coating booth, characterized in that installed in a tower form at a predetermined interval in the left and right directions.

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