JP2000024564A - Scum treatment apparatus of coating line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the treatment workability of scum by arranging a mesh conveyor in a tank to which sewage discharged from a coating booth is supplied in an inclined state to partition the interior of the tank into a sewage tank part and a circulating water tank part and separating scum in the sewage tank part from water to scrape up the same and recovering the scum. SOLUTION: When sewage W1 containing scum S is supplied to the sewage tank part 2a of a tank 2, the sewage W1 flows from the left-hand side of a mesh conveyor 3 arranged in an inclined state to the right-hand side thereof. At this time, the scum S and water W2 in the sewage W1 are separated by the metal net of the mesh conveyor 3 and the scum S bonded to the surface of the metal net is scraped up by a scraper to be fed upwardly. When the scum S is fed to the gap between chain wheels 22 and 23, it is dried by the hot air from a hot air supply part 4. The dried scum S falls by the air from an air nozzle 5 when it is fed through the gap between the chain wheels 24 and 25 to be placed on a feed-out conveyor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scum treatment apparatus for a coating line having a coating booth on which an object to be coated is coated, for example, by spraying a coating gun against a flowing water wall on the rear side with a coating gun. In particular, the present invention relates to a scum treatment apparatus for a coating line capable of efficiently separating and collecting scum contained in sewage after painting.

[0002]

2. Description of the Related Art Conventionally, as a method of treating scum in sewage discharged from a coating booth of this type of coating line, for example, scum in sewage stored in a tank is floated by a chemical, and these scums are treated. Is generally scooped up from a tank with a scooping tool, dehydrated by a device such as a filter press, a belt press, a screw press, a decanter, and the like, and the dehydrated cake is incinerated or entrusted to an industrial waste disposal company.

[0003]

However, in this treatment method, it is necessary for an operator to scoop up the scum floating on the sewage surface of the tank with a scooping tool.
The scum processing work is inferior in workability, such as the scooping work being performed manually and it takes time and labor, and it is difficult to automate the processing work, and the frequency of replacing and renewing water in the tank tends to increase. There was a point.

Further, only the scum floating on the sewage surface of the tank can be scooped up and treated, so that the efficiency of collecting the scum in the tank is low and the scum scooped up is removed by a filter press, a decanter or the like. Since it is necessary to perform dehydration treatment using the equipment of the above, the equipment cost of these equipment increases,
There is a problem in that scum processing requires a considerable cost. Further, there is a problem that the quality of water circulating between the tank and the coating booth is inferior, and maintenance work for a water flow plate, a circulating pump, piping and the like of the coating booth is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to automate a scum processing operation and greatly delay replacement or renewal of water in a tank. It is an object of the present invention to provide a scum treatment apparatus for a coating line, which can improve the quality of circulating water. Another object of the present invention is to provide a scum treatment apparatus for a coating line capable of improving the scum collection efficiency, in addition to the object of the present invention. It is an object of the present invention to provide a scum treatment apparatus for a coating line capable of further improving scum recovery efficiency and purifying circulating water, in addition to the objects of the first to third aspects of the present invention.

Another object of the present invention is to provide a scum processing apparatus for a coating line capable of reliably removing scum from a mesh conveyor in addition to the objects of the first to fourth aspects of the present invention. The object of the invention described in claim 6 is, in addition to the object of the invention described in claim 5, to provide a scum processing apparatus for a coating line in which scum recovery operation itself can be easily performed and scum processing operation after recovery can be easily performed. It is in. The object of the invention described in claim 7 is, in addition to the objects of the inventions described in claims 1 to 6, in addition to the fact that the water content of the scum is reduced so that the work of peeling and removing from the mesh conveyor can be performed more easily. An object of the present invention is to provide a scum treatment device for a coating line that can reduce the amount of scum.

[0007]

In order to achieve the above object, an invention according to claim 1 of the present invention is a scum treatment apparatus for treating scum contained in sewage discharged from a painting booth of a painting line. And a tank to which sewage is supplied,
A mesh conveyor which is disposed in an inclined state in the tank and partitions the inside of the tank into a sewage tank section and a circulating water tank section, and a scum in the sewage tank section is separated from water and is scraped up by the mesh conveyor. Scum removing means for removing and collecting the removed scum from the mesh conveyor.

[0008] With this configuration, the sewage discharged from the coating booth of the coating line is supplied to the sewage tank section of the tank, and the scum contained in the sewage is separated from the water by the mesh conveyor and adheres to the mesh conveyor. The water passes through the mesh of the mesh conveyor and is stored in the circulating water tank. The scum scooped up by the mesh conveyor is separated and removed from the mesh conveyor by the scum removing means and collected.

Thus, scum in the sewage is automatically separated and removed by a mesh conveyor or a scum removing means just by supplying the sewage into the sewage tank portion of the tank, thereby recovering the scum. Workability is improved and automation can be achieved. In addition, since the mesh conveyor is disposed in the tank in an inclined state, the scum adheres to the mesh conveyor well, and the scum on the bottom side of the sewage tank is scraped up by the mesh conveyor to collect the scum. Efficiency is improved, water in the tank is purified, and replacement and renewal of water in the tank are greatly delayed, and the quality of circulating water is improved.

Further, the invention according to claim 2 is characterized in that at least one of the inclination angle and the transport speed of the mesh conveyor is adjustable. With such a configuration, for example, according to the degree of contamination of sewage, it is possible to adjust the inclination angle of the mesh conveyor or to adjust the transport speed of the mesh conveyor, so that the scum contained in the sewage can be adjusted by the mesh conveyor. The scum can be reliably scraped up, and the scum collection efficiency is further improved.

The invention according to claim 3 is characterized in that scrapers for scraping up the scum are provided at predetermined intervals along the conveying direction of the mesh conveyor. With this configuration, the scraper provided at a predetermined interval on the mesh conveyor can surely scrape up the scum even if it is sludge-like, and the scum collection efficiency is further improved.

Further, the invention according to claim 4 is characterized in that a scum recovery pump is arranged in the circulating water tank of the tank, and the scum that has entered the circulating water tank by the scum recovery pump is returned to the sewage tank. With this configuration, even if scum enters the circulating water tank section from the sewage tank section, the scum is collected by the scum collection pump and returned to the sewage tank section, and the scum collection efficiency is improved. The water in the circulating water tank section is further purified as well as improved.

According to a fifth aspect of the present invention, the scum removing means has an air nozzle for jetting air from the back side to the front side of the mesh conveyor, and the mesh conveyor is driven by the air jetted from the air nozzle. The scum adhering to the surface is peeled and removed. With this configuration, the scum that has been scraped up by the mesh conveyor and adhered to its surface is
The mesh conveyor is separated and removed by the air from the air nozzle sprayed from the back side to the front side, and the scum is reliably removed from the mesh conveyor by a simple configuration.

Further, the invention according to claim 6 is characterized in that the scum peeled and removed from the mesh conveyor is automatically accumulated in the collecting means to reduce the water content of the scum. With this configuration, the scum removed and removed from the mesh conveyor by the scum removing unit is automatically collected and collected by the collecting unit such as a collection box or a hemp bag, and the scum is hydrated in the accumulated state. The rate drops. This facilitates the scum collection operation itself and the scum processing operation after collection.

According to a sixth aspect of the present invention, a hot air supply means for supplying hot air to the scum scooped up by the mesh conveyor is provided on the upstream side of the scum removing means during the conveyance of the mesh conveyor. Features.
With this configuration, the scum containing water that has been scraped up by the mesh conveyor and adhered to its surface is dried by hot air from the hot air supply means, and the water content is reduced, The scum can be more easily removed from the mesh conveyor, and the scum can be removed in a dry state, thereby reducing the processing cost in the subsequent process.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 7 show an embodiment of a scum processing apparatus for a coating line according to the present invention. FIG. 1 is a basic configuration diagram, FIG. 2 is a side view showing a specific configuration thereof, and FIG. Part A detailed front view, FIG. 4 is a partially cutaway front view of the mesh conveyor, FIG. 5 is a perspective view of a main part for explaining its operation, and FIGS. 6 and 7 are main parts for explaining the same operation. It is sectional drawing.

First, the basic configuration of a scum processing apparatus according to the present invention will be described with reference to FIG. The scum treatment apparatus 1 includes a tank 2 to which sewage is supplied, a mesh conveyor 3 disposed in an inclined state in the tank 2, and hot air supply means provided at a predetermined position on a conveyance path of the mesh conveyor 3. , A scum removing means, an air nozzle 5 and a discharge conveyor 6, a scum recovery pump 7, a circulation pump 8, and the like.

The tank 2 is installed so as to be buried at a position lower than the floor surface 9 such that one side 3a (left side in the figure) is lower and the other side 3b (right side in the figure) is higher. The sewage tank section 2a and the circulating water tank section 2b are formed by being partitioned by the inclined mesh conveyor 3.

A supply side 11a of a circulation channel 11 formed between the coating booth 10 and the tank 2 is connected to the sewage tank section 2a, and a circulating water tank section 2b is connected to the sewage tank section 2b through the circulation pump 8. The return side 11b of the circulation channel 11 is connected. The scum collection pump 7 is disposed on the water surface side in the circulating water tank 2b, and the return flow path 12 connected to the discharge side of the scum collection pump 7 is connected to the sewage tank 2a of the tank 2. .

The above is the basic configuration of the scum processing apparatus 1 according to the present invention. Next, the specific configuration will be described with reference to FIGS. The mesh conveyor 3 arranged in an inclined state in the tank 2 has a metal net 14 in which mesh holes 14a of about 30 mesh (see FIGS. 6 and 7) are formed. = 45 degrees (see FIG. 2). This inclination angle α is
For example, it is configured to be adjustable by adjusting the height position of the other side 3b of the mesh conveyor 3.

A chain 15 is fixed to each of the left and right ends of the metal net 14 of the mesh conveyor 3 in the width direction by fixing brackets (not shown), and is attached to the surface 14b of the metal net 14 (see FIG. 5). A scraper 16 for scraping up a scum, which is composed of, for example, an L-shaped angle, is fixed at regular intervals along the transport direction a by a screw or the like.

Further, one side 3a of the mesh conveyor 3
A rotatable tip-moving roller 19, which serves as a lower end support portion of the mesh conveyor 3, is provided on both left and right sides of the frame 17 in the form of a frame.
Are provided, and a pair of rotatable tip chain wheels 20 which are elastically movable by a spring 18 and can adjust the tension of the metal net 14 are provided respectively. On the other side 3b projecting upward from the tank 2 of the mesh conveyor 3, the four left and right wheel stopper side plates 21 connected to the frame 17 are provided with four (eight in total) chain wheels 22 to 25 on each side. It is rotatably supported.

A wheel 28 (or a chain drive) of a chain drive motor 29 is connected to the chain wheel 23 of the chain wheels 22 to 25 via a wheel 26 (or a pulley) and a chain 27 (or a belt) connected to the shaft. Pulley). When the chain drive motor 29 rotates, the chain wheel 23 rotates, and the metal net 14 wound around the tip chain wheel 20 and the chain wheels 22 to 25 moves in the transport direction A. In addition, the right and left frames of the frame 17 of the mesh conveyor 3 are shown in FIG.
As shown in FIG. 5, a chain running path 30, a partition 31 and a partition support angle 32 are provided, and a plate width determining rod 33 and the like are provided between the frames.

As shown in FIG. 2, a partition plate support angle 34 is fixed to the wall surface of the sewage tank portion 2a of the tank 2. The partition plate support angle 34 has a rubber plate 35 made of urethane rubber or the like. The proximal end is fixed. This rubber plate 35
Has a width substantially equal to that of the mesh conveyor 3, and a tip portion thereof is a surface 14 b of the metal net 14 of the mesh conveyor 3.
The rubber plate 35 prevents the wastewater W1 from directly entering the tip chain wheel 20 provided on one side 3a of the mesh conveyor 3.

The air nozzle 5 and the discharge conveyor 6 are provided between the chain wheels 24 and 25 in the middle of the conveying path of the mesh conveyor 3 and between the chain wheels 22 and 23 (not shown in FIG. 2). The hot-air supply unit 4 is provided at the bottom. The air nozzle 5 is fixed to the lower end of a rodless cylinder 36 that can move in the width direction of the mesh conveyor 3, and
It is arranged at the lower part between 23 and the upper part between the chain wheels 24 and 25. By this air nozzle 5, air at a predetermined pressure supplied from a compressor or the like (not shown)
The fuel is injected downward from the injection hole 5a (see FIGS. 5 and 7).

As shown in FIGS. 2 and 5, the discharge conveyor 6 is formed of a driving roller 37, a driven roller (not shown), and a transport belt 38 wound between the two rollers. When the discharge conveyor driving motor 40 provided on the frame 39 installed on the floor surface 9 rotates, the conveying belt 38 moves in the direction of arrow B (the conveying direction of the mesh conveyor 3) via the driving-side roller 37. (In the direction perpendicular to the direction).

The discharge conveyor 6 is provided at the lower end of the air nozzle 5 (injection hole 5) below the space between the chain wheels 24 and 25.
The scum scattering prevention plate 41 made of silicon rubber or the like is disposed at a predetermined distance from the mesh conveyor 3 and in a horizontal state at right angles to the mesh conveyor 3.
(See FIG. 2 and FIG. 7).
Then, the transport speed of the mesh conveyor 3 (the scum scraping speed) is set to, for example, 150 mm / min.
The air injection by the air nozzle 5 is 12 at 5 times / minute.
Set to second / one time, the transport speed of the discharge conveyor 6 is 1 m
/ Min.

The hot air supply section 4 is formed by a discharge port of hot air guts (not shown), and this hot air duct is connected to, for example, a drying furnace of a coating line, and excess hot air of the drying furnace is used. Note that the installation position of the hot air supply unit 4 is not limited to the position between the chain wheels 22 and 23, but is upstream from the installation position of the air nozzle 5 such as immediately upstream of the chain wheel 22 or between the chain wheels 23 and 24. At an appropriate position.

Next, an example of the operation of the scum processing apparatus 1 will be described. First, as shown in FIG. 1, when the sewage W1 containing the scum S used in the coating booth 10 is supplied from the supply side 11a of the circulation channel 11 to the sewage tank portion 2a of the tank 2, the sewage W1 becomes 2 flows from the left side to the right side of the inclined mesh conveyor 3 in the tank 2 as shown by an arrow C in FIG. At this time, the scum S in the sewage W1 is
As shown in FIG. 6, the water cannot pass through the mesh holes 14 a of the metal net 14 of the mesh conveyor 3, is attached to the surface 14 b of the metal net 14, and the water W 2 in the sewage W 1 is indicated by an arrow. Mesh hole 14 like c
a, and enters the circulating water tank portion 2b of the tank 2.

The rubber plate 35 prevents the waste water W1 from directly entering the chain wheel 20 at one end 3a of the mesh conveyor 3, thereby preventing the scum S from adhering to the portion. . As a result, the scum S in the waste water W1 and the water W2 are separated by the metal net 14 of the mesh conveyor 3, and the scum S attached to the surface 14b of the metal net 14 is transferred to the scraper 16 moving in the transport direction A. And is transported upward. This scum S is conveyed (raised up) between the chain wheels 22 and 23 on the other side 3b of the mesh conveyor 3.
Then, hot air is supplied from the hot air supply unit 4 to the scum S,
The sludge-like scum S is dried to a predetermined moisture content.

Then, the dried metal net 14
The scum S adhering to the surface 14b is transported downward between the chain wheels 23 and 24, and then horizontally transported between the chain wheels 24 and 25. As shown in FIG. 7, between the chain wheels 24 and 25, the front surface 14b of the metal net 14 is
Is in an upside-down state, and the air nozzle 5 is operated in this state, and air is supplied to the metal net 14.
Are sprayed from the back surface 14c side (upper side) to the front side 14b side (lower side) as indicated by an arrow d.

The scum S adhering to the metal net 14 is separated from the surface 14b by the injection of the air and falls downward as indicated by an arrow E, and is placed on the conveyor belt 38 of the discharge conveyor 6. You. At this time, the air nozzle 5 sprays air a predetermined number of times while reciprocating at a predetermined speed in the width direction of the mesh conveyor 3 as shown by an arrow in FIG. Even if the scum S is attached to the scum, the scum S is surely removed. Further, the scum S may be scattered by the air injection, but the scum S which has been scattered is prevented from being scattered outside the discharge conveyor 6 by the scum scatter prevention plate 41.

The scum S placed on the discharge conveyor 6 is conveyed to the downstream side by the discharge conveyor 6, and is disposed at the lower end of the downstream side in a collection box 42 (or a collection bag such as a hemp bag, see FIG. 1). ) Is collected and collected. The scum S collected in the collection box 42 is accumulated in a predetermined amount in the collection box 42, and its water content is reduced. That is, the scum S in the sewage W1 supplied into the sewage tank portion 2a of the tank 2 is separated and scraped up by the mesh conveyor 3, and after being dried, is separated and removed from the mesh conveyor 3 by air to be discharged and conveyed. The scum S is discharged onto the collection box 42, and the scum S is stored in the collection box 42, and the operation from separation and scraping of the scum S to collection is automatically performed.

The scum S that has entered the circulating water tank portion 2b of the tank 2 from, for example, gaps at both ends and the lower end of the mesh conveyor 3 is collected by a scum recovery pump 7 provided in the circulating water tank portion 2b. It is collected and supplied again to the sewage tank section 2a via the return channel 12. Therefore, the water W2 in the circulating water tank portion 2b is further purified, and the water W2 is pumped up by the circulating pump 8 to return to the return side 1 of the circulating flow path 11.
From 1b, it will be supplied again to the coating booth 10.

As described above, according to the scum processing apparatus 1 of the above-described embodiment, the inside of the tank 2 is divided into the sewage tank section 2a and the circulating water tank section 2b by the mesh conveyor 3 arranged in an inclined state in the tank 2. The scum S and the water W2 are supplied to the metal net 14 of the mesh conveyor 3 only by supplying the sewage W1 discharged from the coating booth 10 to the sewage tank 2a.
Can be separated, and entry of the scum S into the circulating water tank portion 2b of the tank 2 can be almost eliminated.

Further, the scum S separated from the water W2 is scraped up by the mesh conveyor 3, dried by the hot air supply unit 4, and then separated downward by jetting air from the air nozzle 5 to be discharged. Since the scum S in the waste water W1 can be reliably removed from the surface 14b of the metal net 14, since the scum S can be discharged onto the conveyor 6. For these reasons, the separation and discharge (recovery) of the scum S in the sewage W1 can be automatically performed, and the operation of manually scooping the scum S from the tank 2 one by one as in the related art is completely unnecessary, and the sewage S is not required. W1 processing operation, ie, scum S
Can be automated, and its workability (work efficiency) can be greatly improved.

The mesh conveyor 3 has, for example, α =
Since the metal net 14 of the mesh conveyor 3 is provided with a scraper 16 for scraping up the scum, the metal net 14 of the mesh conveyor 3 is disposed in a state inclined at 45 degrees. The scum S in the sewage W1 can be recovered more efficiently while being satisfactorily adhered to the surface 14b of the wastewater W1. In particular, by adjusting the angle of the mesh conveyor 3 or adjusting the transport speed, the scum S according to the degree of contamination of the sewage W1 is adjusted.
, And the efficiency of collecting the scum S can be further improved.

Further, a hot air supply section 4 is provided in the middle of the conveying path of the mesh conveyor 3 so that the scum S having a high moisture content can be dried to a predetermined moisture content. Can be weakened, and the scum S can be surely peeled off from the metal net 14 by jetting air from the air nozzle 5. In particular, since the direction of the air jet from the air nozzle 5 is set to be directed downward, the scum S adhering to the metal net 14 can be separated by using its own weight, and the scum S Is more efficiently removed.

Further, since the operation of the air nozzle 5 (air injection) and the conveying speed of the mesh conveyor 3 are set as described above, the scum S may adhere to the entire width of the mesh conveyor 3 in the width direction. However, the scum S can be reliably removed and removed by the reciprocating movement of one air nozzle 5. From these, the scum S adhering to the metal net 14 of the mesh conveyor 3 can be easily and reliably removed, and as a result, the metal net 14 can be prevented from being clogged. A long-term continuous operation of the processing apparatus 1 becomes possible.

Further, since the scum S is separated and removed in a dried state and collected in the collection box 42 by the discharge conveyor 6, the dewatering operation of the scum S after the collection becomes unnecessary, and the conventional dewatering for scum S is not necessary. The installation of various devices is not required, and the processing cost of the scum S collected in the collection box 42 can be reduced. In addition, surplus hot air from a drying furnace provided in the coating line can be used as the hot air supply unit 4, or air or the like used for a coating gun (not shown) in the coating line can be used to remove the scum S. Therefore, the existing equipment installed in the coating line can be effectively used. As a result, it is possible to greatly reduce the overall cost related to the processing of the scum S as compared with the related art.

Further, since the scum recovery pump 7 is disposed in the circulating water tank portion 2b of the tank 2, the scum S that has entered the circulating water tank portion 2b is recovered by the scum recovery pump 7 and transferred to the sewage water tank portion 2b. It can be returned, and the cleanliness of the water W2 in the circulating water tank 2b can be improved. As a result, the clean water W2 can be supplied to the painting booth 10 again, so that the water W2 can be effectively used and the cleanliness (water quality) of the water W2 is improved. Maintenance of the circulating pump 8, the piping of the circulating channel 11, and the like can be saved. In addition, the frequency of replacement and renewal of the water W2 in the tank 2 can be greatly delayed as compared with the related art.

Furthermore, the scum processing apparatus 1 is constituted by disposing the mesh conveyor 3 provided with the hot air supply unit 4, the air nozzle 5, the discharge conveyor 6 and the like in a tank 2 provided underground in an inclined state. Because you can
It can be easily installed in existing tanks without major modifications. In addition, since the scum scattering prevention plates 41 are provided on both sides of the discharge conveyor 6 in the transport direction, the scum S that is scattered by the supply of air from the air nozzle 5 is prevented from scattering outside the discharge conveyor 6. It can be reliably prevented from re-adhering to the floor surface or from adhering to the floor surface 9 or the scum processing device 1.

In the above embodiment, the case where the scum S adhering to the metal net 14 is removed by reciprocating one air nozzle 5 in the width direction of the mesh conveyor 3 has been described. However, the present invention is not limited to this. As the air nozzle, for example, a shower-like air nozzle having substantially the same width as the metal net 14 and having a large number of injection holes can be used. The installation position of the nozzle 5 is not limited to the above-described embodiment, and can be appropriately installed.

In the above embodiment, the size of the tank 2, the shape and width of the mesh conveyor 3 such as the width and length, the inclination angle thereof, the transfer speed of the mesh conveyor 3 and the discharge conveyor 6, the operating conditions of the air nozzle 5, and the like. This is merely an example, and it goes without saying that various changes can be made without departing from the spirit of each invention according to the present invention.

[0045]

As described above in detail, according to the first aspect of the present invention, only the sewage is supplied into the sewage tank section of the tank.
Since the scum in the sewage can be automatically separated and removed and collected by a mesh conveyor arranged in an inclined state in the tank or a scum removing means provided in the middle of the conveyance of the mesh conveyor, the scum processing is performed. The operation can be automated, the replacement and renewal of water in the tank can be greatly delayed, and the quality of circulating water can be improved.

According to the second aspect of the present invention, in addition to the effects of the first aspect, the inclination angle of the mesh conveyor can be adjusted in accordance with, for example, the degree of contamination of sewage.
Since the conveyance speed of the mesh conveyor can be adjusted, the scum contained in the sewage can be reliably scraped up by the mesh conveyor, and the scum collection efficiency can be further improved.

According to the third aspect of the invention, in addition to the effects of the first or second aspect, even if the scum contained in the sewage in the sewage tank portion of the tank is sludge-like, the mesh conveyor can be used. Since the provided scraper can surely lift the scum, the scum collection efficiency can be further improved.

According to the fourth aspect of the present invention, in addition to the effects of the first to third aspects, the scum that has entered the circulating water tank portion of the tank is collected by the scum collection pump and returned to the sewage tank portion. Because it can be returned, the scum recovery efficiency can be improved, and the water in the circulating water tank section is further purified and this water can be reused. It is possible to save labor for maintenance such as.

According to the fifth aspect of the present invention, in addition to the effects of the first to fourth aspects of the present invention, the scum scraped up by the mesh conveyor and adhered to the surface thereof is
Because it is separated and removed by air from the air nozzle sprayed from the back side to the front side of the mesh conveyor,
With a simple configuration, the scum attached to the mesh conveyor can be easily and reliably peeled and removed.

According to the sixth aspect of the present invention, in addition to the effects of the fifth aspect, the scum separated and removed from the mesh conveyor by the scum removing means is transferred to a collecting means such as a collecting box or a hemp bag. Since the scum is collected and collected automatically, and the water content of the scum is reduced in the accumulation state, the scum collection operation itself can be easily performed, and the scum processing operation after the collection is more easily performed. Can be.

According to the seventh aspect of the present invention, in addition to the effects of the first to sixth aspects, the scum containing water adhering to the surface of the scum which has been scooped up by the mesh conveyor and has a hot air Since the scum is dried by hot air from the supply means and its water content is reduced, the scum can be more easily and reliably removed from the mesh conveyor, and the scum is collected in a dry state. This has the effect of reducing costs associated with processing.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a scum treatment apparatus for a coating line according to the present invention.

FIG. 2 is a side view showing the specific configuration of the same.

FIG. 3 is a detailed front view of part A in FIG. 2;

FIG. 4 is a partially cutaway front view of the mesh conveyor.

FIG. 5 is a perspective view of a main part for explaining the operation.

FIG. 6 is an essential part cross-sectional view of a metal net portion for explaining the same operation;

FIG. 7 is a sectional view of a main part of an air nozzle portion for explaining the operation.

[Explanation of symbols]

 1 scum treatment device 2 tank 2a sewage tank section 2b circulating water tank section 3 mesh conveyor 4 hot air supply unit 5 air nozzle 6 discharge conveyor 7 scum recovery pump 8 Circulation pump 10 Painting booth 11 Circulation channel 14 Metal net 14a Mesh hole 14b Surface 14b ··· Back side 15 ··· Chain 16 ··· Scraper 19 ··· Tip moving roller 20 ··· Tip chain wheel 22-25 ··· Chain wheel 29 .... Chain drive motor 35 ... Rubber plate 36 ... Rodless syringe 41 ...... scum shatterproof plate 42 ...... collection box W1 ...... sewage W2 ...... water S · · · · · · · scum

Claims (7)

[Claims] 1. A scum treatment apparatus for treating scum contained in sewage discharged from a coating booth of a coating line, comprising: a tank to which the sewage is supplied; And a scum in the sewage tank section is separated from water and a mesh conveyor is lifted up. A scum treatment device for a coating line, comprising: scum removing means. 2. A scum processing apparatus for a coating line according to claim 1, wherein said mesh conveyor is configured to be able to adjust at least one of its inclination angle and conveying speed. 3. A scum processing apparatus for a coating line according to claim 1, wherein said mesh conveyor is provided with scrapers for scraping up the scum at predetermined intervals along the transport direction. 4. The tank according to claim 1, wherein a scum recovery pump is disposed in the circulating water tank portion, and the scum that has entered the circulating water tank portion by the scum recovery pump is returned to the sewage tank portion. A scum treatment apparatus for a coating line according to any one of the above. 5. The scum removing means has an air nozzle for injecting air from the back side to the front side of the mesh conveyor, and adheres to the surface of the mesh conveyor by the air injected from the air nozzle. The scum processing apparatus for a coating line according to any one of claims 1 to 4, wherein the scum is peeled off. 6. A scum treatment apparatus for a coating line according to claim 5, wherein the scum separated and removed from said mesh conveyor is automatically accumulated in a collecting means to reduce the water content of the scum. 7. A hot air supply means for supplying hot air to the scum scooped up by the mesh conveyor is provided upstream of the scum removal means during the conveyance of the mesh conveyor. 7. A scum processing apparatus for a coating line according to any one of claims 6 to 6.