JPH07265762A - Paint sludge collector and paint mist collecting system for wet coating room - Google Patents

Abstract

PURPOSE:To improve sludge collection efficiency in a paint sludge collector which is used for a process in which water, which contains paint sludge and is stored in a water tank in a wet coating room, is introduced to the collector and purified by removing the sludge to be returned to the water tank. CONSTITUTION:A paint sludge collector is equipped with an off-timer function. At the end of operations, when an off-timer button 155 is operated and the power source of a wet coating room is turned off, the prevention of sludge membrane formation on the surface of stored water and the dispersion of the sludge are promoted by a return water flow etc., during the time-measuring term of a timer 159. Since showering water or a water membrane does not work on water stored in the water tank when the operation of the coating room is stopped, the agitation in the water tank by the water flow is reduced, allowing the sedimentation of the sludge. Efficient sludge collection can be carried out by sucking the concentrated sludge with a pump 3.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art It is strongly desired to effectively collect excess mist of paint sprayed from a spray gun or the like in a painting work place to maintain a working environment. Therefore, a device called a painting room is required. It is used a lot. As one form of the coating chamber, a fan or the like forms an air flow toward the inside of the coating chamber to introduce excess mist, and the water page (2) stored in the water tank is pumped to the upper part of the coating chamber by a pump or the like to form an air flow. There is a so-called wet coating room in which water is dropped like a shower in the intersecting direction, or a water film is formed by using the suction effect of the fan itself so that the paint mist is taken into the water. .

[0003] In such a wet coating room, from the viewpoint of preventing water pollution, the management or treatment of the water that has taken in the paint and is very problematic. Therefore, there has been proposed a paint sludge collecting device that separates paint sludge from the stored water to purify the water and reuse the water in a wet coating room.

Therefore, in a paint mist collecting system including a paint sludge collecting device, the sludge is coagulated and separated into a colloidal form in the water tank of the wet coating chamber without being solidified, gelled and settled at the bottom of the water tank. Therefore, an appropriate paint flocculant is added. The water in which the settled paint sludge is dispersed is pumped out from the bottom of the water tank by a pump, the paint sludge is separated and collected by a collector, and the purified water is returned to the water tank.

[0005]

In a wet coating chamber to which such a paint sludge collecting device is applied, the power of the wet coating chamber is turned off and the operation of the pump or fan is stopped to reduce the agitation state in the water tank. Settling of sludge to the bottom is promoted and sludge collection efficiency is improved. However, if the power source of the paint sludge collection device is turned off together with the wet coating chamber, sludge collection using the sludge settling state cannot be performed.

[0006] In view of such a situation, the present invention has an object to efficiently collect paint sludge.

Page (3)

To this end, the present invention provides
In a paint sludge collection device used to introduce water containing paint sludge stored in a water tank of a wet coating room, separate the paint sludge and return purified water to the water tank, a stop command It is equipped with a timer for delaying the stop of the operation in response to the operation input of.

Further, the paint mist collecting system of the present invention comprises:
A wet coating chamber having a water tank, and a paint sludge collecting device for introducing water containing paint sludge stored in the water tank, separating the paint sludge and returning purified water to the water tank A timer for providing a time lag in the operation of the wet coating chamber and the paint sludge collecting device, and allowing only the paint sludge collecting device to operate while the operation of the wet coating chamber is stopped. .

[0009]

According to the present invention, the paint used for introducing water containing paint sludge stored in the water tank of the wet coating chamber, separating the paint sludge and returning purified water to the water tank. The sludge collection device has a timer that delays the stop of the operation in response to the operation input of the stop command, so even if the paint sludge collection device is instructed to be turned off together with the wet coating chamber at the end of the painting work, The operation is maintained for a predetermined period. Or, since it has a timer for providing a time lag in the operation of the wet coating chamber and the paint sludge collection device,
It is possible that only the paint sludge collecting device is activated while the operation of the wet coating chamber is stopped. . Therefore, within the operating period of those timers, the return water flow from the paint sludge collection device, etc., promotes the prevention of the formation of a sludge film on the surface of the water stored in the water tank and the dispersion of the sludge.
The shower-like water or water film does not act on the stored water in the water tank when the coating room stops operating, so the agitation state in the water tank decreases and the sludge settles to a portion where the concentration becomes high. The sludge can be efficiently collected by introducing it into the device. Page (4)

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of a paint mist collecting system including a paint sludge collecting device as an embodiment of the present invention. Here, 1 is a water tank for storing water in the wet coating chamber, in which an appropriate paint flocculant is added in order to cause the sludge to be aggregated and separated into colloidal form without being solidified, gelled and settled at the bottom of the water bath. It Denoted at 3 is 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) drawn out from the submersible pump 3 and to return purified water to the water tank 1. In this example, a centrifugal circulating water purifying device is used. In such a paint sludge collecting device 10, 11 is a centrifugal tank as centrifugal separating means that is driven to rotate at high speed, and 13 is a blade arranged in the centrifugal tank, which is provided integrally with the lid 11A of the centrifugal tank. Reference numeral 15 is a mounting portion of the centrifuge tank, 17 is a housing that houses the centrifuge tank 11 and the mounting portion 15, and 19 is a motor that applies a rotational force to a shaft connected to the mounting portion 15 via a transmission mechanism 18 such as a belt and a pulley. Is.

Reference numeral 21 is a pipe for introducing water pumped out by the submersible pump 3 into the centrifugal tank 11, and a throttle valve 21V for adjusting the flow rate is arranged in the middle thereof. Further, a branch port 21A is provided at the connecting portion with the submersible pump 3, and a part of the water to be pumped by the pump 3 is ejected into the water tank to generate a water flow in the water tank 1, which contains a paint flocculant. The water and the paint mist falling on the water surface are stirred and mixed to enhance the dispersion effect of the paint sludge.

Reference numeral 23 is a pipe for returning the purified water, in which sludge has been separated as the centrifuge tank 11 rotates, to the water tank 1 page (5). Aperture 23A in a direction that can be effectively received
have. The return pipe 23 is configured so that the position, posture and shape of the end portion on the coating chamber side are appropriately determined to improve sludge dispersion efficiency. That is,
In this example, the end 23E of the return pipe 23 on the side of the coating chamber is positioned near the water surface of the water stored in the water tank 1, and the attitude is determined so that the return water directly collides with the water surface. A flexible tube is formed near the end 23E, and the metal fitting 23K is provided there.
It is squeezed properly by sandwiching it and strengthening the force of the water flow toward the water surface.

Since the return water is spread and hit against the water surface 1A in this way, the stirring efficiency in the water tank 1 is increased, the solidification of the paint sludge is effectively prevented, and the dispersion in water is promoted. Therefore, the suction efficiency of the pump 3 or the collection efficiency of the paint sludge by the sludge collection device 10 can be improved. Note that the pipe end may have any configuration as long as such an effect can be achieved. For example, a suitable nozzle is attached to the end,
The return water may be jetted in a fan shape or the like.

Reference numeral 25 is a pipe for collecting the overflowed water from the centrifugal tank 11 and returning it to the water tank 1, and a gutter provided along the side surface of the centrifugal tank 11 inside the casing 17 so as to receive the overflow water. It is connected to the member 17A.

Further, when the drainage capacity of the pipe 25 becomes insufficient, the water is removed from the centrifugal tank 11 and the gutter-shaped member 17.
It may reach the bottom of the casing 17 through the gap between the casing A and the centrifuge tank bearing portion located at the bottom of the casing and other parts of the device, or water may leak outside the device. We are trying to detect the overflow of water due to the deterioration of capacity as soon as possible and take appropriate measures.

Page (6) As a configuration for detecting the overflow water reaching the bottom of the housing 17, a conduit 31 is provided from the bottom of the housing to reach the container 33, and the container 33 is a sensor in the form of a limit switch. It is hung from the leaf spring actuator 37 of 35,
When a certain amount or more of water is stored in the container 33, the actuator 37 is displaced or deformed to operate the sensor 35, and the control unit 40 stops the operation of the sludge trapping device 10 in accordance with the operation, and a predetermined amount. The alarm is issued. As a result, the centrifuge tank bearing section and other parts of the equipment located at the bottom of the housing are reliably protected from flooding, and there is no leakage of water outside the equipment, and the operator performs maintenance, including cleaning of piping, etc. Can be kept in good condition.

In FIG. 1, a container 33 is suspended from a leaf spring actuator 37 of a sensor 35 in the form of a limit switch so that a certain amount or more of water is stored in the container 33 as a structure of means for detecting overflow. Although the actuator 37 is displaced or deformed to operate the sensor 35 when it is operated, it goes without saying that various other configurations can be adopted as the detecting means. For example, a float may be provided in the container 33, and a sensor that mechanically, optically, or electrically detects the displacement of the float (such as an electrical contact or a capacitance) may be provided.

FIG. 2 shows an example of the construction of an operation panel arranged on the outer plate of the paint sludge collecting device 10 of FIG. 1 and a switch for controlling the on / off of the device in response to the operation thereof.
Here, on the operation panel 150, operation buttons 151, 15 for immediately turning on / off the device in response to the operation.
3 and an off-timer button 155 for turning off the device after a predetermined time has passed from the operation.
The switch 157 turns on / off the power supply line to each drive unit (pump 3 and centrifuge motor 19) of the device in response to the operation signals of the operation buttons 151 and 153, and also supplies power according to the time-up signal of the timer 159. Turn off the line.

Page (7) The timer 159 starts the time counting operation in response to the operation of the off timer button 155, and outputs a time-up signal when a predetermined time has elapsed. The time measured by the timer 159 can be set in accordance with the time during which the sedimentation state of the paint sludge with high transfer efficiency to the paint sludge collection device 10 occurs in the water tank 1 (for example, 30 minutes to 1 hour), or The time can be set by the operator so that an appropriate time can be set according to the paint used and the wet coating room.

In such a structure, when the coating mist is taken into the shower-like water or water film during the operation of the coating chamber and stored in the water tank 1, the coating sludge is solidified by the action of the coagulant. Instead, they are aggregated and separated into colloids, gelled, and settled at the bottom of the water tank 1. When the paint sludge collecting device 10 is operated, sediment is collected by the submersible pump 3
And is introduced into the centrifugal tank 11 through the pipe 21. Further, a part of the water containing the pumped paint sludge is returned to the water tank through the branch port 21A, whereby a water flow is generated in the water tank 1. The water containing sludge introduced into the centrifugal tank 1 is separated into sludge and water 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 is introduced into the pipe 23 through the opening 23A and flows back into the water tank 1. Also, centrifuge tank 1
Water overflowing from 1 is returned to the water tank 1 via the pipe 25. Furthermore, when overflow occurs from the gap between the centrifugal tank 11 and the gutter-shaped member 17A and water leaks from the bottom of the housing 17 to the container 33, that fact is detected and the sludge collecting device 10 is detected. Is stopped and a predetermined alarm is issued.

Further, since the paint sludge collecting device 10 is provided with the off-timer function in the system of this example, if the off-timer button 155 is operated at the end of the work and the power of the wet coating chamber is turned off, the timer 159 measures the time. During the operation period, the return water flow, etc. prevents the formation of a sludge film on the surface of the stored water and promotes the dispersion of the sludge (8). At the same time as the operation of the coating chamber is stopped, shower-like water or a water film accumulates in the water tank. Since it does not act on the water, the agitation state due to the water flow in the water tank 1 is reduced, and the pump 3 can suck the portion of which the concentration is high due to the sedimentation of the sludge to efficiently collect the sludge. .

The present invention is not limited to the above embodiment,
Various modifications are possible. For example, in the above example, the paint sludge collecting device 10 is provided with the off-timer function, but a wide suitable timer is used to provide a time lag for the operation of the wet coating chamber and the paint sludge collecting device, and the operation of the wet coating chamber is stopped. In addition, the same effect as described above can be achieved by operating only the paint sludge collecting device. For example, it is possible to configure so that the stop time of the paint sludge collecting device can be set, and the operation of the paint sludge collecting device is started before the start of the coating work, that is, before the start of the operation of the wet coating chamber. The ON time may be set. Alternatively, the operation of the paint sludge collecting device may be delayed for a set time in conjunction with the operation of the wet coating chamber being turned off, or conversely, the wet coating chamber may be operated in conjunction with turning on the paint sludge collecting device. It is also possible to delay the start of operation of the device for a set time.

In addition, a fan or the like forms an air flow toward the interior of the coating chamber to introduce excess mist, and water is dropped in a shower shape in a direction intersecting with the air flow, or a water film is formed to form an underwater film. The wet coating chamber that takes in the paint mist in the room is equipped with a pump that pumps the water stored in the water tank to form a downward water film, or the fan itself without such a pump. The water film is formed by utilizing the effect, and the present invention can be applied to any of them.

Further, when considering a system consisting of a coating chamber and a paint sludge collecting device, it is possible to construct both of them one by one because of the balance between the frequency or capacity of the coating chamber and the capability of the centrifugal separation means. It may not be a good idea. For example, if a large coating room is used in comparison with the capacity of the centrifuge means (9), the frequency of sludge removal from the centrifugal tank increases, and the coating work must be interrupted each time, so it is practical. There's a problem. Also, when a large centrifuge tank is used, there is a problem in operability in sludge removal or cleaning. Therefore, it is possible to improve the operation efficiency or work efficiency by configuring the system according to the frequency of use or capacity of the coating room and the capacity of the centrifuge means, and disposing a plurality of one of them for the other.

[0028]

As described above, according to the present invention,
Introduce water containing paint sludge stored in the water tank of the wet coating room, separate the paint sludge, and wash the purified water into the water tank to the paint sludge collection device. Since the timer for delaying the stop of the operation with respect to the operation input is provided, the operation is maintained for a predetermined period even when the paint sludge collecting device is instructed to be turned off together with the wet coating chamber at the end of the coating work. Alternatively, since a timer for providing a time lag in the operation of the wet coating chamber and the paint sludge collecting device is provided, only the paint sludge collecting device can be operated while the operation of the wet coating chamber is stopped. . Therefore, during the operation period of these timers, the return water flow from the paint sludge collector prevents the formation of a sludge film on the surface of the water in the water tank and promotes the dispersion of the sludge. Since the water or water film in the water tank does not act on the stored water in the water tank, the agitation state in the water tank is reduced, and the portion where the concentration has increased due to the sedimentation of the sludge is introduced into the sludge collection device for efficient sludge collection. You will be able to gather.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a paint mist collecting system including a paint sludge collecting device and a wet coating chamber according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration example of an operation panel of a paint (10) paint sludge collecting device and a switch circuit which controls on / off of the device in response to the operation thereof.

[Explanation of symbols]

 1 Water Tank 3 Pump 10 Paint Sludge Collection Device 11 Centrifugal Tank 13 Blades 15 Centrifugal Tank Attachment 17 Centrifugal Tank Housing 18 Transmission Mechanism 19 Motors 21, 23, 25 Piping 150 Operation Panel 151 On Button 153 Off Button 155 Off Timer Button 157 Switch 159 timer

Claims (2)

[Claims] 1. A paint sludge trap used for introducing water containing paint sludge stored in a water tank of a wet coating chamber, separating the paint sludge and returning purified water to the water tank. The paint sludge collecting device is characterized in that the device is provided with a timer for delaying the stop of the operation in response to a stop command operation input. 2. A wet coating chamber having a water tank, and a paint for introducing water containing paint sludge stored in the water tank, separating the paint sludge and returning purified water to the water tank. A sludge collecting device and a timer for providing a time lag in the operation of the wet coating chamber and the paint sludge collecting device so that only the paint sludge collecting device operates while the operation of the wet coating chamber is stopped. The paint mist collection system is characterized by including