JP2013094706A - Method and apparatus for dry recovery of paint mist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for dry recovery of a paint mist, improving the maintainability of a coating booth.SOLUTION: Powder is supplied to vibrating conveyors 6, 16 exciting and fluidizing a granular material and powder and conveying them in a predetermined direction, and paint mist is brought into contact with the flowing powder on the vibrating conveyors to allow the flowing powder to catch the paint mist. The powder sticks to the paint mist to form paint sludge with a larger grain diameter than the powder, and a mixture of the paint sludge and excess powder not sticking to the paint mist is allowed to pass on a sieve 18 that forms a part of the vibrating conveyor, to eliminate the excess powder from the vibrating conveyor while recovering paint sludge left on the vibrating conveyor.

Description

The present invention relates to a paint mist dry recovery method and a paint mist dry recovery apparatus.

FIG. 3 of Patent Document 1 discloses a paint mist dry recovery method characterized by causing an air flow entrained with paint mist to flow into a dry filter.

Japanese Patent Laid-Open No. 5-168989

The paint mist dry recovery method of FIG. 3 of Patent Document 1 has a problem that the dry filter needs to be frequently replaced, and the maintainability of the coating booth deteriorates.
The present invention has been made in view of the above problems, and provides a paint mist dry recovery method and a paint mist dry recovery device that improve the maintainability of the paint booth compared to the paint mist dry recovery method of FIG. The purpose is to do.

In order to solve the above-mentioned problems, in the present invention, the granular material or powder is vibrated and fluidized, and the powder is supplied to a vibrating conveyor that conveys in a predetermined direction, and the paint mist is turned into a flowing powder on the vibrating conveyor. The paint mist is trapped in the fluidized powder by contact, and the powder is adhered to the paint mist to form a paint sludge having a particle size larger than that of the powder. The paint sludge and the paint are formed on the sieve that forms part of the vibrating conveyor. There is provided a paint mist dry recovery method characterized in that a mixture of surplus powder not adhering to mist is passed to remove surplus powder from a vibration conveyor, and paint sludge remaining on the vibration conveyor is recovered.
By supplying the powder to the vibration conveyor, the powder can be fluidized and conveyed in a predetermined direction. The paint mist is brought into contact with the fluidized powder on the vibrating conveyor to capture the paint mist on the fluidized powder, and the powder is adhered to the paint mist to form a paint sludge having a larger particle size than the powder. The paint sludge and the paint mist It is possible to transport the mixture of surplus powder not adhering to the predetermined direction. The surplus powder can be removed from the vibration conveyor by passing a mixture of paint sludge and surplus powder over a sieve forming a part of the vibration conveyor. By recovering the paint sludge remaining on the vibration conveyor, a paint mist dry recovery method is realized.
The dry filter disposed in the exhaust passage of the painting booth may be supplied with an air flow after the paint mist is captured by the fluidized powder and the paint mist is removed. As a result, the frequency of replacement of the dry filter is reduced and the maintainability of the painting booth is improved.

In a preferred embodiment of the present invention, an air flow entraining the paint mist is made to collide with the baffle plate so that the paint mist adheres to the baffle plate, and the paint mist flowing down the baffle plate and dripping from the lower end of the baffle plate is supplied to the vibration conveyor. Contact the upper fluidized powder.
In the preferable aspect of this invention, the resin sheet which has paint peelability is attached to the surface of the baffle plate where the air flow which entrains paint mist collides.
In a preferred embodiment of the present invention, the air flow entrained with the paint mist is brought into direct contact with the fluidized powder on the vibrating conveyor.
As a method of bringing the paint mist into contact with the fluidized powder, an air flow that entrains the paint mist may collide with the baffle plate, and the paint mist adhering to the baffle plate may be dropped onto the fluidized powder from the lower end of the baffle plate. Alternatively, an air flow entraining the paint mist may be brought into direct contact with the fluidized powder.
When an air flow that entrains the paint mist collides with the resin sheet having paint peelability attached to the surface of the baffle plate, the paint mist cured on the resin sheet can be easily expanded or contracted or deformed. It can be peeled and dropped onto a vibrating conveyor.
In a preferred embodiment of the present invention, the powder removed from the vibrating conveyor is re-supplied to the vibrating conveyor through a sieve.
By re-feeding the powder removed from the vibrating conveyor through the sieve to the vibrating conveyor, the consumption of the powder can be reduced.
In a preferred embodiment of the present invention, the paint components are biodegraded by causing organic matter-decomposing microorganisms to act on the paint sludge collected from the vibration conveyor.
Generation of industrial waste can be suppressed by biodegrading the paint components of the collected paint sludge.
In a preferred embodiment of the present invention, biodegradable powder is used.
If biodegradable powder is used, when the paint component of the collected paint sludge is biodegraded, the powder is also biodegraded together with the paint component, so that the amount of discharged material after biodegradation is reduced. Even when paint sludge is landfilled, the entire amount of paint sludge is biodegraded over time, which is suitable for environmental conservation.
In a preferred embodiment of the present invention, oil residue is used as the powder.
The oil residue is suitable as a powder for capturing the paint mist because it does not diffuse in the form of mist even when fluidized on a vibrating conveyor due to moderate dampening.

In the present invention, a vibrating conveyor that vibrates and fluidizes granular materials and powder and conveys the powder in a predetermined direction, a powder supply device that supplies powder to the vibrating conveyor, and a fluidized powder on the vibrating conveyor. A paint mist guide device that guides the paint mist toward the fluidized powder, and a paint sludge and paint mist having a larger particle size than the paint mist that forms part of the vibratory conveyor and forms a part of the vibrating conveyor A sieve for removing excess powder from the mixture of excess powder not attached to the powder, a powder storage device for containing excess powder removed from the vibrating conveyor via the sieve, and a vibrating conveyor after removing the excess powder There is provided a paint mist dry recovery apparatus, comprising: a paint sludge storage device for storing the recovered paint sludge.
When the paint mist dry recovery device according to the present invention is applied to a painting booth, the maintainability of the painting booth is improved.

According to the present invention, there is provided a paint mist dry recovery method and a paint mist dry recovery apparatus that improve the maintainability of the coating booth as compared with the paint mist dry recovery method of Patent Document 1.

1 is an overall view of a paint mist dry recovery apparatus for carrying out a paint mist dry recovery method according to a first embodiment of the present invention. It is sectional drawing of the paint mist dry-type collection | recovery apparatus for enforcing the paint mist dry-type collection | recovery method concerning 2nd Example of this invention.

A paint mist dry recovery method and a paint mist dry recovery apparatus according to a first embodiment of the present invention will be described.
As shown in FIG. 1, a plurality of baffle plates 2 extend in a plurality of layers in the extending direction of the exhaust passage 1 in the horizontally extending exhaust passage 1 of a painting booth (not shown). The baffle plates are arranged in a staggered arrangement to form the baffle plate group 2a. A resin sheet 3 having a paint peeling property such as a silicon sheet or a polytetrafluoroethylene (PTFE) sheet is attached to an upstream surface of the baffle plate 2 with respect to the air flow in the exhaust passage 1. The resin sheet 3 extends below the lower end of the baffle plate 2. A slit-like opening 1a is formed on the bottom wall of the exhaust passage 1 so as to face the lower end of the baffle plate 2 for each baffle plate 2, and the lower portion of the resin sheet 3 passes through the opening 1a and the bottom of the exhaust passage 1 It extends to the bottom of the wall.
A dry filter 4 is arranged on the downstream side of the baffle plate group 2a with respect to the air flow in the exhaust passage 1. An exhaust fan 5 is disposed on the downstream side of the dry filter 4 with respect to the air flow in the exhaust passage 1.
A first vibrating conveyor 6 is disposed below the exhaust passage 1 and below the baffle plate group 2a. An eccentric load generating motor 7 is attached to the upstream end of the first vibrating conveyor 6. Powder discharge ports 8, 9, and 10 are disposed above the upstream portion of the first vibrating conveyor 6. The powder discharge port 8 is connected to a powder supply device (not shown) via a powder transfer tube 11, and the powder discharge port 9 is a powder to be described later via a powder transfer tube 12 and a powder transfer device 13. Connected to the body recovery tank 19, the powder discharge port 10 is connected to a paint sludge biodegradation device 22, which will be described later, via a powder transport pipe 14 and a powder transport device 15.
A second vibrating conveyor 16 is disposed on the downstream side of the first vibrating conveyor 6. An eccentric load generating motor 17 is attached to the upstream end of the second vibrating conveyor 16. A sieve 18 that forms a part of the second vibrating conveyor 16 is disposed in the middle region of the second vibrating conveyor 16. A powder storage tank 19 is disposed below the sieve 18. A paint sludge storage tank 20 is disposed below the downstream end of the second vibrating conveyor 16. The powder storage tank 19 is connected to the powder discharge port 9 via the powder transport device 13 and the powder transport pipe 12 as described above. The paint sludge storage tank 20 is connected to a paint sludge biodegradation device 22 via a paint sludge transport conveyor 21. As described above, the paint sludge biodegradation device 22 is connected to the powder discharge port 10 via the powder transport device 15 and the powder transport pipe 14.

The operation of the paint mist dry recovery apparatus configured as described above will be described.
The eccentric load generating motors 7 and 17 are operated, and the first vibrating conveyor 6 and the second vibrating conveyor 16 are operated. The 1st vibration conveyor 6 and the 2nd vibration conveyor 16 have the function to convey the mounted granule and powder in a predetermined direction by vibrating.
Powder is supplied from a powder supply device (not shown) to the powder discharge port 8 via the powder conveyance tube 11, and the powder discharged from the powder discharge port 8 is supplied to the upstream portion of the first vibrating conveyor 6. The In this embodiment, oil residue is used as the powder. The powder is fluidized by the vibration of the first vibrating conveyor 6 and conveyed toward the downstream end of the first vibrating conveyor 6.
As shown by the white arrow in FIG. 1, the air flow accompanied by the paint mist flows into the exhaust passage 1 from a painting booth (not shown) and passes through the baffle plate group 2a. When the air flow passes through the baffle plate group 2a configured so that the baffle plates 2 of the adjacent layers are arranged in a staggered manner in a plurality of layers in the extending direction of the exhaust passage 1, the baffle plate 2 The air flow collides with the resin sheet 3 attached to the upstream surface with respect to the air flow, and the paint mist entrained in the air flow adheres to the surface of the resin sheet 3. By passing through the baffle plate group 2a while repeatedly colliding with the baffle plate 2 of each layer, the paint mist is removed from the air flow entrained with the paint mist. The air flow from which the paint mist has been removed after passing through the baffle plate group 2a is exhausted into the external environment via the fan 5, as indicated by double white arrows in FIG.

The paint mist adhering to the surface of the resin sheet 3 flows down along the surface of the resin sheet 3 and drops from the lower end of the resin sheet 3. The paint mist dripped from the lower end of the resin sheet 3 falls on the first vibrating conveyor 6, contacts the flowing powder on the first vibrating conveyor 6, and is captured by the flowing powder. The paint mist trapped in the fluidized powder becomes a granular paint sludge having a particle size larger than that of the powder because the powder adheres to the surface.
The mixture of the granular paint sludge and the excess powder not adhering to the paint mist is conveyed toward the downstream end of the first vibrating conveyor 6 while fluidizing, and the upstream portion of the second vibrating conveyor 16 from the downstream end. Fall to. The fluidized mixture passes over a sieve 18 that forms part of the second vibrating conveyor 16. When the mixture passes over the sieve 18, excess powder falls through the pores of the sieve 18 and is stored in the powder storage tank 19. The paint sludge that has been fluidized and conveyed with the powder at the first vibration conveyor 6 and the upstream portion of the second vibration conveyor 16 has a large particle size due to adhesion of the powder and coalescence of the paint sludges, and Since the surface is covered with powder and the adhesiveness is suppressed, it can pass over the sieve 18 and does not adhere to the sieve 18 and does not hinder the operation of the sieve 18. The granular paint sludge remaining on the second vibrating conveyor 16 falls from the downstream end of the second vibrating conveyor 16 and is stored in the paint sludge storage tank 20. As a result, the paint mist is recovered as paint sludge.
The powder in the powder storage tank 19 is transported to the powder discharge port 9 via the powder transport device 13 and the powder transport pipe 12 and discharged from the powder discharge port 9, and the first vibrating conveyor 6. Is supplied to the upstream portion of the circulator and is recycled.
The paint sludge in the paint sludge storage tank 20 is transported to the paint sludge biodegradation device 22 via the paint sludge transporting conveyor 21, and the paint components are produced in the paint sludge biodegradation device 22 under the action of organic matter decomposing microorganisms. Disassembled. Moreover, the oil residue which is the powder adhering to the paint component is also biodegraded. The powdery biodegradation product is conveyed to the powder discharge port 10 via the powder transport device 15 and the powder transfer tube 14, and discharged from the powder discharge port 10, so that the first vibration conveyor 6 Supplied upstream.

As can be seen from the above description, in the paint mist dry recovery method according to the present embodiment, the dry filter 4 disposed in the exhaust passage 1 of the paint booth captures the paint mist on the fluidized powder and collects the paint mist. Since the air flow after removal flows in, the replacement frequency of the dry filter 4 is reduced, and the maintainability of the painting booth is improved.
An air flow that entrains the paint mist collides with the baffle plate 2, more specifically, the resin sheet 3 attached to the baffle plate 2, and the paint mist adhering to the resin sheet 3 flows from the lower end of the resin sheet 3 to the fluidized powder. By dropping it onto the fluid powder, the fluid powder can be brought into contact with the paint mist, and the fluid powder can capture the paint mist.
The paint mist cured on the resin sheet 3 can be easily peeled off by expanding or contracting or deforming the resin sheet 3 and dropped onto the fluidized powder on the vibrating conveyor 6.
By re-feeding the powder removed from the second vibrating conveyor 16 through the sieve 18 to the first vibrating conveyor 6, the amount of powder consumption can be reduced.
Generation of industrial waste can be suppressed by biodegrading the paint components of the collected paint sludge.
The oil residue is suitable as a powder for capturing the paint mist because it does not diffuse in the form of mist even when fluidized on a vibrating conveyor due to moderate dampening. In addition, the oil debris, which is a biodegradable substance, is biodegraded together with the paint components in the paint sludge biodegradation apparatus 22, so that the amount of discharge from the paint sludge biodegradation apparatus 22 is reduced.
Instead of biodegrading the recovered paint sludge, it may be treated as it is as shown in FIG. 1 as a truck figure. The paint sludge collected by the conventional wet recovery method contained moisture and various chemical substances and was heavy in weight. However, the paint sludge recovered by the dry recovery method of the present example was almost entirely coated with paint. As it is, it is reduced in weight compared to the past. Therefore, industrial waste disposal costs are reduced.
Instead of circulating and supplying the biodegradation product as powder to the first vibrating conveyor 6, it may be used as a fertilizer for a home garden or a flower bed as shown in FIG.
The paint sludge biodegradation device 22 may be integrated with the paint sludge storage device 20.
Other powders may be used in place of the oil residue. Desirably, the powder is moderately wet and does not diffuse in the form of mist even when shaken and fluidized.
It is preferable to use a biodegradable powder such as oil cake or sawdust with appropriate dampening as the powder. If biodegradable powder is used, when the paint component of the collected paint sludge is biodegraded, the powder is also biodegraded together with the paint component, so that the amount of discharge from the biodegradation apparatus is reduced. Even when paint sludge is landfilled, the entire amount of paint sludge is biodegraded over time, which is suitable for environmental conservation.
The paint sludge conveyance conveyor 21 may be abolished and the collected paint sludge may be conveyed manually.

A paint mist dry recovery method and a paint mist dry recovery apparatus according to a second embodiment of the present invention will be described.
As shown in FIG. 2, the painting booth 31 is divided into an upper painting space 31 a and a lower exhaust space 31 b by a grating floor 32. An air supply fan (not shown) that generates a descending air flow in the painting space 31a is disposed behind the ceiling of the painting space 31a. The bottom wall 31c of the exhaust space 31b is inclined downward toward the center, and an exhaust port 31d is formed at the center. A pair of first vibration conveyors 33 inclined toward the exhaust port 31d are disposed on the bottom wall 31c.
An exhaust passage 34 is disposed below the bottom wall 31 c of the painting booth 31. The exhaust passage 34 extends toward one side wall of the painting booth 31 and extends upward along the side wall on the outer side of the side wall. A plurality of baffle plates 35 are adjacent to each other in a plurality of layers in the extending direction of the exhaust passage 34 in the exhaust passage 34 and in a portion of the exhaust passage 34 adjacent to the one side wall of the painting booth 31. The baffle plates 35 of the layer to be arranged are arranged in a staggered arrangement to form a baffle plate group 35a. A dry filter 36 is disposed on the downstream side of the baffle plate group 35 a with respect to the air flow in the exhaust passage 34. An exhaust fan 37 is disposed on the downstream side of the dry filter 36 with respect to the air flow in the exhaust passage 34.
A second vibrating conveyor 38 is disposed in the exhaust passage 34. The second vibrating conveyor 38 extends from a position below the baffle plate group 35 a to a position below the other side wall facing the one side wall of the painting booth 31. A sieve 39 that forms a part of the second vibrating conveyor 38 is disposed in the vicinity of the end of the second vibrating conveyor 38 that is separated from the baffle plate group 35a. A powder storage tank 40 is disposed below the sieve 39, and a paint sludge storage tank 41 is disposed below the end of the second vibrating conveyor 38 on the side separated from the baffle plate group 35a.

The operation of the paint mist dry recovery apparatus configured as described above will be described.
The 1st vibration conveyor 33 and the 2nd vibration conveyor 37 operate | move. The first vibrating conveyor 33 has a function of conveying the placed granular material or powder toward the downstream end on the side close to the exhaust port 31d by vibrating.
Powder is supplied to the upstream portion of the first vibrating conveyor 33 from a powder supply device (not shown) via a powder conveyance pipe (not shown) and a powder discharge port (not shown). Also in this embodiment, oil residue is used as a powder. The powder is fluidized by the vibration of the first vibrating conveyor 33 and conveyed toward the downstream end of the first vibrating conveyor 33.
As shown by the white arrow in FIG. 2, the descending air flow accompanied by the paint mist generated in the painting space 31 a flows into the exhaust space 31 b through the grating floor 32. The descending air flow directly contacts the powder fluidized on the first vibrating conveyor 33 and is captured by the fluidized powder. The paint mist trapped in the fluidized powder becomes a granular paint sludge having a particle size larger than that of the powder because the powder adheres to the surface.
The mixture of the granular paint sludge and the excess powder not adhering to the paint mist is conveyed toward the downstream end of the first vibrating conveyor 33 while being fluidized, falls from the downstream end, and passes through the exhaust port 31d. Falls into the exhaust passage 34. The descending air flow entrained with the paint mist flowing into the exhaust space 31b directly contacts the powder falling from the downstream end of the first vibrating conveyor 33 through the exhaust port 31d into the exhaust passage 34 and is captured by the powder. And become a granular paint sludge. A part of the mixture of the paint sludge and the powder falls on the second vibrating conveyor 38. The remaining portion of the mixture rides on the air flow in the exhaust passage 34 and flows downstream, and passes through the baffle plate group 35a. When the mixture passes through the baffle plate group 35a, the mixture collides with the baffle plate 35 and falls onto the second vibrating conveyor 38.
The air flow from which the mixture of the granular paint sludge and the excess powder not adhered to the paint mist is removed passes through the dry filter 36 and is discharged into the external environment through the exhaust fan 37.
The mixture dropped on the second vibrating conveyor 38 is fluidized and conveyed toward the downstream end of the second vibrating conveyor 38. The mixture passes over a sieve 39 that forms part of the second vibrating conveyor 38. When the mixture passes over the sieve 39, excess powder falls through the pores of the sieve 39 and is stored in the powder storage tank 40. The coating sludge that has been fluidized and conveyed along with the powder in the upstream and middle flow sections of the first vibrating conveyor 33 and the second vibrating conveyor 38 has a large particle size due to adhesion of the powder and coalescence of the coating sludge. In addition, since the surface is covered with powder and the adhesiveness is suppressed, it can pass over the sieve 39 and does not adhere to the sieve 39, and the operation of the sieve 39 is not hindered. The granular paint sludge remaining on the second vibrating conveyor 38 falls from the downstream end of the second vibrating conveyor 38 and is stored in the paint sludge storage tank 41. As a result, the paint mist is recovered as paint sludge.

As can be seen from the above description, in the paint mist dry recovery method according to the present embodiment, the dry filter 36 disposed in the exhaust passage 34 of the paint booth causes the paint mist to be captured by the fluidized powder. Since the air flow after the removal flows in, the replacement frequency of the dry filter 36 is reduced, and the maintainability of the painting booth is improved.
Similarly to the first embodiment, a resin sheet having paint release properties may be attached to the baffle plate 35, and the powder in the powder storage tank 40 may be supplied again to the first vibrating conveyor 33. The paint sludge in the storage tank 41 may be conveyed to a paint sludge biodegradation device to biodegrade paint components and oil residue, and the powdered biodegradation product is circulated and supplied to the first vibrating conveyor 33. May be.

In the said Example, the structure of a vibration conveyor is not limited to a specific thing. A commercially available vibrating conveyor may be used.

The present invention can be widely used for dry recovery of paint mist.

1, 34 Exhaust passages 2, 35 Baffle plates 2a, 35a Baffle plate group 3 Resin sheets 4, 36 Dry filter 5, 37 Exhaust fans 6, 33 First vibrating conveyors 7, 17 Motors for generating eccentric loads 8, 9, 10 Powder Body discharge port 11, 12, 14 Powder transport pipe 16, 38 Second vibrating conveyor 18, 39 Sieve 19, 40 Powder storage tank 20, 41 Paint sludge storage tank 21 Paint sludge transport conveyor 22 Paint sludge biodegradation device 31 Coating Booth 31a Painting space 31b Exhaust space 31c Bottom wall 31d Exhaust port

Claims (16)

Supply powder to a vibrating conveyor that vibrates and fluidizes granular materials and powder, and conveys the powder in a predetermined direction. The coating powder mist is brought into contact with the flowing powder on the vibrating conveyor so that the flowing powder captures the coating mist. The powder is attached to the paint mist to form a paint sludge having a particle size larger than that of the powder, and the mixture of the paint sludge and the excess powder not attached to the paint mist is passed over the sieve that forms part of the vibrating conveyor. A paint mist dry recovery method characterized in that excess powder is removed from the vibration conveyor, and paint sludge remaining on the vibration conveyor is recovered. The air flow that entrains the paint mist collides with the baffle plate to cause the paint mist to adhere to the baffle plate, and the paint mist that flows down the baffle plate and drops from the lower end of the baffle plate is brought into contact with the fluidized powder on the vibrating conveyor. The paint mist dry recovery method according to claim 1. 3. The paint mist dry recovery method according to claim 2, wherein a resin sheet having paint peelability is attached to a surface of the baffle plate on which the air flow entraining the paint mist collides. 2. The paint mist dry recovery method according to claim 1, wherein the air flow entraining the paint mist is brought into direct contact with the fluidized powder on the vibrating conveyor. The paint mist dry recovery method according to any one of claims 1 to 4, wherein the powder removed from the vibrating conveyor is re-supplied to the vibrating conveyor through a sieve. The paint mist dry recovery method according to any one of claims 1 to 5, wherein an organic substance-decomposing microorganism is allowed to act on the paint sludge collected from the vibration conveyor to biodegrade the paint components. 7. The paint mist dry recovery method according to claim 1, wherein biodegradable powder is used. 8. The paint mist dry recovery method according to claim 7, wherein oil dust is used as the powder. Vibrating conveyor that vibrates and fluidizes granular materials and powder, conveys in a predetermined direction, powder supply device that supplies powder to the vibrating conveyor, and guides the paint mist toward the flowing powder on the vibrating conveyor A paint mist guide device that makes the paint mist contact the fluidized powder and a part of the vibratory conveyor, which is not attached to the paint sludge and paint mist with a larger particle size than the powder attached to the paint mist A sieve that removes excess powder from the mixture of excess powder, a powder storage device that accommodates excess powder removed from the vibrating conveyor via the sieve, and a paint sludge collected from the vibrating conveyor after removing the excess powder The paint mist dry-type collection | recovery apparatus characterized by including the paint sludge storage apparatus which accommodates. 10. The paint mist dry recovery apparatus according to claim 9, wherein the paint mist guide device is a baffle plate that is disposed above the vibration conveyor and collides with an air flow that entrains the paint mist. 11. The paint mist dry recovery apparatus according to claim 10, wherein a resin sheet having paint peelability is attached to an air flow collision surface of the baffle plate. The paint mist dry recovery apparatus according to claim 9, wherein the paint mist guide device is an air flow generating device that generates a paint mist entrained air flow in direct contact with the fluidized powder on the vibration conveyor. The paint mist dry recovery apparatus according to any one of claims 9 to 12, further comprising a powder refeeding device that refeeds the powder in the powder container to the vibrating conveyor. 14. A paint sludge biodegradation device integrated with or separate from a paint sludge storage device for biodegrading paint components by causing organic matter decomposing microorganisms to act on the paint sludge. The paint mist dry recovery device described. The paint mist dry recovery apparatus according to any one of claims 9 to 14, wherein biodegradable powder is used. 16. The paint mist dry recovery apparatus according to claim 15, wherein oil residue is used as the powder.

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