JP3157672B2 - Paint mist collection system and wet coating room for the system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint mist collecting system and a wet coating room for the system.

[0002]

2. Description of the Related Art In a painting shop, it is strongly desired to effectively collect excess mist of paint sprayed from a spray gun to preserve the working environment, and for that purpose, a device called a painting room is frequently used. Have been. As one form of the coating chamber, a fan or the like forms an airflow toward the interior of the coating chamber and introduces excess mist, and at the same time, drops water like a shower in a direction intersecting the airflow, or forms a water film. There is a so-called wet coating room in which paint mist is taken into water. In such a wet coating room, from the viewpoint of preventing water pollution, the management or treatment of the water that takes in and stores the paint becomes very problematic. Therefore, there has been proposed a paint sludge collecting apparatus that separates paint sludge from stored water, purifies the water, and reuses the water in a wet coating room.

FIG. 1 shows an example of a paint mist collecting system including a conventional paint sludge collecting device. Here, reference numeral 1 denotes a water tank for storing water in a wet coating chamber, in which an appropriate paint coagulant is added so as to coagulate and separate sludge in a colloidal form without solidifying, to gel and settle at the bottom of the water tank. You. Reference numeral 3 denotes a submersible pump arranged at the bottom of the water tank 1 for pumping out the settled paint sludge together with water.
Reference numeral 10 denotes a paint sludge collection device provided to separate and collect paint sludge from water (water in which paint sludge is dispersed) pumped from the submersible pump 3 and to return purified water to the water tank 1. In the example, a centrifugal separation type circulating water purification device is used. Such a paint sludge collecting apparatus 10
In the figure, reference numeral 11 denotes a centrifugal tank as a centrifugal separation means driven at high speed, and 13 denotes a blade disposed in the centrifugal tank, which is provided integrally with the lid 11A of the centrifugal tank. Reference numeral 15 denotes a mounting portion of the centrifugal tank, 17 denotes a housing that houses the centrifugal tank 11 and the mounting portion 15, and 19 denotes an electric motor that applies a rotational force to a shaft connected to the mounting portion 15 via a transmission mechanism 18 such as a belt or a pulley. It is.

[0004] Reference numeral 21 denotes a pipe for introducing water pumped by the submersible pump 3 into the centrifugal tank 11, and a throttle valve 21V for adjusting a flow rate is provided in the middle of the pipe. Further, a branch port 21A is provided at a connection portion with the submersible pump 3, and a part of water to be pumped by the pump 3 is jetted into the water tank, thereby generating a water flow in the water tank 1 and containing a paint flocculant. The water and the paint mist falling on the surface of the water are stirred and mixed to enhance the dispersion effect of the paint sludge. Reference numeral 23 denotes a return pipe from which sludge is separated along with the rotation of the centrifugal tub 11 and the purified water is returned to the water tub 1. The return pipe 23 has a direction in which the water flow generated by the rotation of the centrifugal tub 11 can be effectively received. Opening 2
3A. Reference numeral 25 denotes a pipe for collecting water overflowing from the centrifugal tank 11 and returning the collected water to the water tank 1, and a gutter-like member 17A provided along the side surface of the centrifugal tank 11 inside the housing 17 so as to receive overflow water. It is connected to the. The water flowing out of the gap between the centrifugal tank 11 and the gutter-like member 17A without being collected even by this means
This is a pipe provided to connect the bottom of the housing 17 and the water tank 1 in order to prevent the water from accumulating at the bottom of the housing 17 and reaching the bearing portion of the mounting portion 15.

[0005] In such a configuration, when the coating room is operated, the paint mist is taken into the shower-like water or water film along with the painting operation, and when the paint mist is stored in the water tank 1, the paint sludge is solidified by the action of the flocculant. Instead, they are aggregated and separated into colloids, gelled and settled at the bottom of the water tank 1. This is pumped out by the submersible pump 3 and introduced into the centrifugal tank 11 via the return pipe 21. In addition, a part of the water containing the paint sludge pumped out is returned to the water tank from the branch port 21A, and thereby a water flow is generated in the water tank 1. The water containing the sludge introduced into the centrifugal tank 1 is separated into water and sludge by the action of the centrifugal tank 1 rotating at high speed, and the sludge adheres to the blades 13 and the inner wall of the centrifugal tank 11. on the other hand,
The purified water that has been rotated at a high speed is vigorously introduced into the pipe 23 through the opening 23A, and is injected into the water tank 1 and refluxed. Water overflowing from the centrifugal tank 11 is supplied to the pipe 2
5 is returned to the water tank 1 through the space 5, and the water that has not collected completely overflows from the gap between the centrifugal tank 11 and the gutter-shaped member 17 </ b> A and reaches the bottom of the housing 17. The water flows down through a pipe 27 provided so as to connect the bottom of the water tank 1 to the water tank 1 and is returned to the water tank 1.

However, in the case of a general wet coating room, water is used.
The middle pump 3 can be installed at the position where the painting work is actually performed.
Because it becomes a water tank in the general-purpose ordinary electrical specifications
Submersible pumps are dangerous and cannot be used. This result
As a result, is it a painting work place separate from the actual painting work location?
Maintainer called auxiliary water tank in safe place separated from
Special type wet coating room with an overhanging water tank
Make and install a submersible pump in the auxiliary tank
are doing. Therefore, it cannot be installed in a general wet coating room.
Therefore, there is a problem that the cost is increased. this
As a countermeasure, self-priming pumps are installed outside the general wet-type painting room.
Where suction pipes are installed and only suction pipes are painted.
Paint into the water tank and suck water along with paint sludge
They are sent to a sludge collection device. But underwater
A branch port 21A is provided at a water tank position as in the case of a pump,
Part of the water to be pumped by the pump 3 is jetted into the water tank
This causes a water flow in the water tank 1 and removes the paint flocculant.
Stir and mix the contained water with the paint mist falling on the water surface
This can enhance the dispersion effect of paint sludge
Had no problem.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of these problems, and it is safe to pump out water containing sludge from a water tank of a general wet coating room which is a dangerous place. Even when a self-priming pump is provided outside the wet coating chamber, a water flow is generated in the water tank to improve the stirring efficiency in order to enhance the dispersion effect of the paint sludge in the water tank. It is in.

[0008]

For this purpose, a paint sludge collecting system according to the present invention is characterized in that water containing paint sludge stored in a water tank of a wet type coating chamber is disposed outside the coating chamber and is subjected to the above-mentioned water treatment. In order to transfer the paint sludge to a centrifugal separation type paint sludge collecting device, a self-priming pump in which a suction pipe is inserted into the water is provided outside the wet coating chamber. In the collecting system, a pipe connecting the water tank and the paint sludge collecting device so that return water that is separated and purified by the centrifugal separation type paint sludge collecting device and is returned by the centrifugal force is returned to the water tank. With the return water returning to the surface of the water stored in the water tank
A means for diffusing a water flow was provided at an end of the pipe facing the water tank so as to be sprayed, and the end was disposed facing the water surface. Further, branching off from a pipe connecting the pump and the paint sludge collecting device,
It has a branch pipe for refluxing a part of the water to be transferred to the centrifugal separation type paint sludge collecting device to the water tank, and an end of the branch pipe is formed such that the water stored in the water tank is stirred. Arranged facing the water or underwater.

[0009]

According to the present invention, water containing paint sludge stored in the water tank of the wet coating room is removed so that the water containing the sludge can be safely pumped out of the water tank of the wet coating room, which is a dangerous place. In order to transfer the paint sludge from the water to a centrifugal type paint sludge collecting device which is disposed outside the coating chamber and separates the paint sludge from the water,
In a paint sludge collecting system in which a self-priming pump having a suction pipe inserted therein is disposed, the centrifugal paint sludge collecting device separates the paint sludge and purifies it. A pipe connecting the water tank and the paint sludge collecting device so as to return the water to the water tank; and the return water that returns is diffused toward the surface of the water stored in the water tank and jetted. A stream of water at the end of the pipe facing the tank,
By providing a means for diffusing and disposing the end portion toward the water surface, the stirring efficiency in the water tank is increased,
The solidification of the paint sludge can be effectively prevented, and the efficiency of collecting paint sludge can be increased. In addition, there is a branch pipe that branches off from a pipe connecting the pump and the centrifugal separation type paint sludge collecting device, and refluxes a part of water transferred to the centrifugal type paint sludge collecting device to a water tank. The end of the water tank is arranged facing the water surface or the water so as to stir the water stored in the water tank, so that the stirring efficiency in the water tank is further increased, the solidification of the paint sludge is effectively prevented, and the paint sludge is thereby prevented. Can improve the collection efficiency.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 2 shows an example of a paint mist collecting system including a paint sludge collecting device as a first embodiment of the present invention.
Here, parts that can be configured in the same manner as in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted in principle.

The present embodiment differs from the configuration of FIG. 1 mainly in the following points. 1) The pump is installed outside the coating room to improve safety.
2) Improve the stirring efficiency in the water tank and reduce the amount of sludge.
That is, it is configured to improve the dispersion efficiency. Below water
The configuration relating to the improvement of the stirring efficiency in the tank will be described in detail.

First, as a configuration for improving safety, a self-priming pump 54 is provided at a safe place outside the coating room.
Here, a pipe 55 for connecting the pump 54 and the water tank 1 was attached. Here, since the pump 54 is installed in a safe place, it is possible to use a pump having ordinary electric specifications.

[0013] Then, as a configuration for improving the dispersion efficiency of the sludge in the water tank, first return pipe 23
3A with respect to the coating room side end 23E of FIG.
And (B) the diffusion member 23K whose details are shown at the end 2
3E, the water discharged from the end collides with or is guided by the surface, and collides while diffusing toward the water surface 1A. Further, a pipe 21 extending from the self-priming pump 54 to the paint sludge collecting device 10.
And a part of the pumped water is transferred to the branch pipe 21.
In addition to the reflux by B, the end of the branch pipe is also configured in the same manner as the end of the return pipe 23.

If the agitation in the water tank is insufficient, the paint sludge floats on the water surface of the water tank and, at the same time, becomes clumpy with the lapse of time, and cannot be sucked by the self-priming pump 54, or in the worst case, The agglomerated paint sludge adheres to the suction port of the self-priming pump 54 and cannot be sucked. In addition, depending on the paint, paint sludge dispersed in water is supplied to the self-priming pump 54.
It is difficult for the self-priming pump 54 to suck the paint sludge sufficiently, especially because it stays at the corner of the water tank. However, in the present invention, the water purified and rotated at a high speed by the centrifugal tank shown in FIG. 1 flows into the opening 23A in the return water pipe 23 vigorously, and returns to the water surface through the return water pipe 23 as return water. It is diffused and ejected from the disposed end portion 23E to increase the stirring efficiency in the water tank, thereby improving the sludge dispersion efficiency. In addition, the pumping capacity of the self-priming pump 54 has a margin, and a part of the pumped water is branched as reflux water, sent to the branch pipe 21B, and the end of the branch pipe 21B is directed to the water surface or water. It is arranged so that the water returns to the water tank vigorously. Further, the return water or the return water having a momentum may be spread and hit against the water surface 1A as described above. Of the slurry, and effectively prevents solidification of the sludge floating on the surface of the water and promotes dispersion in the water. Thus, the suction efficiency of the pump 54 or the collection efficiency of the paint sludge by the centrifugal type sludge collection device 10 is improved. Can be increased.

The configuration and position of the end of the pipe may be any as long as the stirring efficiency can be improved. For example, as shown in FIG. The return water may be injected into the water. Further, for example, the pipes 23 and 21B are formed of a flexible tube at least near their ends, and are appropriately crushed with appropriate fittings or the like.
The momentum of the water flow toward the water surface may be increased. Further, as shown in FIG. 5, the end of the branch pipe 21B may be located in the water to increase the stirring efficiency in the water tank 1.

[0016]

As described above, according to the present invention,
Even if a self-priming pump is provided in a safe place outside the coating room so that the sludge-containing water can be safely pumped out, the return water circulating by centrifugal force from the centrifugal type paint sludge collecting device can be used. By diffusing and spraying the water stored in the water tank toward the surface of the water, the stirring efficiency in the water tank is increased, the solidification of the paint sludge is effectively prevented, and the collection efficiency of the paint sludge can be increased. . Furthermore, a branch pipe is provided which branches off from a pipe connecting the pump and the centrifugal separation type paint sludge collecting device, and refluxes a part of water transferred to the centrifugal type paint sludge collecting device to a water tank. By arranging the end of the return water transfer pipe for transferring the water returning to the water tank toward the water surface or water so as to stir the water stored in the water tank, the stirring efficiency in the water tank is improved. Therefore, it is possible to effectively prevent the solidification of the paint sludge, thereby increasing the collection efficiency of the paint sludge.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a conventional paint sludge collecting device.

FIG. 2 is a schematic diagram showing an overall configuration of a paint mist collecting system including a paint sludge collecting apparatus and a wet coating chamber according to an embodiment of the present invention.

FIGS. 3A and 3B are a top view and a side view, respectively, showing a configuration example of an end of a return pipe or the like to which a diffusion member is attached.

FIG. 4 is a schematic diagram showing another configuration example of the end of the return pipe in the configuration of FIG. 2;

FIG. 5 is a schematic diagram showing an overall configuration of a paint mist collecting system including a paint sludge collecting apparatus and a wet coating chamber according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water tank 3 Pump 10 Paint sludge collection apparatus 21, 21B, 23, 25, 27, 55 Piping 23K Metal fitting 23N Nozzle

Claims (2)

(57) [Claims] 1. A water containing paint sludge stored in a water tank of a wet coating room is transferred to a centrifugal type paint sludge collecting device disposed outside the coating room and separating the paint sludge from the water. In front of the wet coating room
In a paint sludge collecting system in which a self-priming type pump in which a suction pipe is inserted into water is disposed, the paint sludge is separated and purified by the centrifugal type paint sludge collecting device and is returned by centrifugal force. A pipe connecting the water tank and the paint sludge collecting device to return the returning return water to the water tank; and diffusing the returning return water toward the surface of the water stored in the water tank. a stream of water at the end of the pipe facing the tank,
A paint sludge collecting system, characterized in that a means for diffusing the paint is provided and the end portion is arranged to face the water surface. 2. A part of the water, which branches off from a pipe connecting the pump and the centrifugal separation type paint sludge collecting device and is transferred to the centrifugal type paint sludge collecting device, is returned to the water tank. 2. The paint sludge collecting system according to claim 1, further comprising a branch pipe, wherein an end of the branch pipe is disposed toward the water surface or the water so as to stir the water stored in the water tank. .