JPH0525557B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses cleaning water to remove paint components such as paint mist contained in exhaust gas from a paint booth and paint lumps that have fallen and adhered to the floor of the paint booth. The cleaning device to be removed is provided with a separation tank that receives the discharged cleaning water from the cleaning device and floats and separates the paint slag from the stored cleaning water, and the treated cleaning water is supplied from the separation tank to the cleaning device. The present invention relates to a paint sludge separation and collection device which is provided with a passage and which allows cleaning water to be circulated and used.

[Conventional technology]

Conventionally, the paint sludge separation and repair equipment described above has a structure in which the paint sludge floated and deposited in the separation tank is directly transferred from the separation tank to the collection container by adjusting the water level of the separation tank (for example, Showa 51-136726
(see publication).

[Problem that the invention seeks to solve]

However, with the above-mentioned conventional system, when a failure occurs in the water level adjustment system of the separation tank, or when trouble occurs on the handling side such as loading and unloading the collection container,
Since it became impossible to remove the floating paint slag from the separation tank, the circulation of cleaning water had to be stopped and the operation of the separation tank had to be interrupted during repair work.
Since the operation of the cleaning equipment is also stopped, for example, in a continuous painting booth, there is a problem that even the operation of the painting line has to be stopped.

In particular, when floating paint slag in a separation tank is transferred to a collection container by adjusting the water level, the size of the collection container is limited for handling purposes, so it is important to minimize the amount of water overflowing into the collection container. However, it is important to transfer the floating paint slag to a collection container as efficiently as possible, but in order to do so, it is necessary to limit the water surface area of the separation tank to a certain small area, and the capacity of the separation tank is accordingly limited. be done.

However, if the capacity of the separation tank is small, the floating capacity of the floating paint slag is small, and if a situation occurs where the floating paint slag cannot be transferred from the separation tank as described above, the operation of the separation tank must be stopped immediately. This made the above-mentioned problem even more pronounced.

In addition, in order to be able to continue operating the cleaning equipment even if a situation arises in which floating paint slag cannot be removed from the separation tank, multiple separation tanks are installed in parallel in the cleaning water circulation system. Even if a situation arises in which floating paint slag cannot be transferred from one separation tank, the other separation tanks are operated to continue supplying cleaning water to the cleaning equipment. There remained the problem that the smaller the amount, the worse the cleaning ability would be.

The purpose of the present invention is to rationally improve the collection form of floating paint slag and the circulation form of treated washing water, thereby stabilizing the circulating supply of washing water to the washing equipment, and at the same time, achieving efficient paint sludge collection. The purpose of this invention is to enable separation and collection with a relatively simple device configuration.

[Means for solving problems]

The characteristic configuration of the paint sludge separation and collection device according to the present invention is that it receives discharged washing water from the washing device, floats and separates paint slag from the stored washing water, and further,
A first weir is provided for a separation tank that supplies treated cleaning water to the cleaning device through a circulation path, and the floating paint slag is discharged from the separation tank along with the overflowing water, and the overflow from the first weir is assisted. A separation tank is installed,
A second weir is provided to allow floating paint slag to flow out together with overflow water from the auxiliary separation tank, and a recovery tank is provided that accommodates a porous collection container that receives overflow water from the second weir and drains and separates paint slag from the received overflow water. established,
A first reflux path for returning treated wash water from the auxiliary separation tank to the separation tank or the cleaning device, and a second reflux path for returning the treated wash water from the recovery tank to the auxiliary separation tank or the separation layer. The functions and effects are as follows.

[Effect]

In other words, since the floating paint slag is transferred from the auxiliary separation tank to the collection container via the second weir, there is a risk that the water level adjustment system of the auxiliary separation tank may malfunction, or trouble may occur when handling the collection container. If a situation arises in which the floating paint slag cannot be transferred to the collection container, during repair work, the first transfer from the separation tank to the auxiliary separation tank
This can be solved by simply stopping the inflow of washing water through the weir, and in order to transfer the floating paint slag to a collection container with limited size as efficiently as possible, it is possible to use an auxiliary separation tank that is limited in water surface area. Therefore, the capacity of the separation tank can be increased and the floating capacity of floating paint slag can be increased, so during repair work, the separation tank can float and separate paint slag in the same or close to normal conditions. It is possible to continue circulating and supplying cleaning water to the cleaning equipment while maintaining the same condition.

Moreover, since the treated cleaning water is returned from the auxiliary separation tank to the separation tank or the cleaning device via the first reflux path, the cleaning water is allowed to flow from the separation tank to the auxiliary separation tank via the first weir. The amount of circulating water supplied to the cleaning equipment does not change depending on whether or not washing water flows into the auxiliary separation tank, and therefore, during repair work, the flow of washing water into the auxiliary separation tank was stopped as described above. Even when the circulating supply of cleaning water to the cleaning device is continued in this state, the same amount of cleaning water as in normal times can be supplied to the cleaning device.

On the other hand, in terms of paint sludge separation and collection efficiency, by overflowing the wash water through the first weir and flowing from the separation tank to the auxiliary separation tank, air bubbles are created in the wash water during the overflow process. Conventionally, a bubble generating device or the like was used to promote the floating of paint slag, but the same effect can be obtained and the floating separation of paint slag can be promoted.

Furthermore, the treated washing water from the recovery tank containing the porous collection container is returned to the auxiliary separation tank or the separation tank through the second circulation path, thereby improving the circulation of washing water between the washing device and the separation tank. By separately circulating the cleaning water, fine paint particles that cannot be collected in one process of separating and collecting paint slag can be grown into paint slag that can be floated and captured in another circulation process. In combination with the promotion of flotation and separation of paint slag due to the inclusion of air bubbles described above, high paint sludge separation and collection efficiency can be obtained.

〔Effect of the invention〕

As a result of the above, the cleaning equipment can continue to operate stably and, for example, it is possible to avoid accidents caused by interrupting the operation of the painting line for repair work on the paint sludge separation and collection equipment side. As an auxiliary device, we have created a paint sludge separation and collection device that is extremely reliable and advantageous in terms of stable operation of the main equipment.

Moreover, since it has a high paint slag separation and collection efficiency, it is advantageous in terms of operating costs, such as reducing the amount of fresh washing water replenishment and cleaning maintenance for adhering paint. It has a relatively simple configuration, such as using a water filter or improving the reflux route of treated washing water, and achieves high paint sludge separation and collection efficiency, making it an advantageous paint sludge separation and collection device in terms of equipment cost. did it.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

In Fig. 1, reference numeral 1 denotes a painting booth. Inside the booth 1, painting robots 2 are arranged on both sides of the transport route for the object to be coated A, and ventilation air is blown out in a downward laminar flow form from a ceiling outlet 3. At the same time, the air within the area is forcibly exhausted through the grating floor 4 to discharge excess spray paint mist to the outside of the area together with the air within the area.

A pan 6 is provided below the grating floor 4 to allow the wash water W overflowing from the gutter 5 to flow down, and the pan 6 catches paint lumps that have fallen from the grating floor 4 and causes them to flow down together with the wash water W. .

In addition, a curved throttle channel 7 is provided in the forced exhaust route of the air within the area, with the pan 6 serving as a partition wall, through which the exhaust air passes at high speed in a state where it joins with the washing water W flowing down the pan 6, and the high-speed passage process is The paint mist in the exhaust air is captured by the cleaning water W.

The cleaning water W that has captured the paint mist and the paint lumps flowing down together with the cleaning water W are received in a storage tank 8 provided below the pan 6.

In other words, the above-mentioned gutter 5, pan 6, bent throttle channel 7,
In addition, the storage tank 8 constitutes a cleaning device for removing paint discharged from the booth 1 with cleaning water W.

As shown in FIGS. 1 and 2, a separation tank 9 is installed separately from the booth 1 as ancillary equipment to the booth 1, and the cleaning water W in the storage tank 8 is collected through a water channel 10 along with the paint contained therein. The paint slag is allowed to flow into the separation tank 9 by gravity, and the paint slag is floated and separated from the stored cleaning water W in the separation tank 9.

The treated cleaning water is continuously supplied to the gutter 5 of the cleaning device through a circulation path 11 provided with a first pump _P1 , so that the cleaning water W is circulated in the cleaning device.

A first weir 12 is provided in a local part of the tank wall of the separation tank 9 to allow floating paint slag to flow out from the separation tank 9 along with overflow water, and the overflow water from the first weir 12 is connected to the separation tank 9 through a water channel 13. The water is allowed to flow into the auxiliary separation tank 14.

In addition, a second weir 15 is provided at a local part of the tank wall of the auxiliary separation tank 14 to allow floating paint slag to flow out from the auxiliary separation tank 14 along with overflowing water, and a second weir 15 is provided in the collection tank 16 adjacent to the auxiliary separation tank 14. A collecting container 17 having a net structure is housed therein to receive overflowing water from the container 15 and drain and separate paint slag from the overflowing water.

The treated washing water W in the auxiliary separation tank 14 is
It is returned to the separation tank 9 via the first reflux path 18 equipped with a pump _P2 , and collected in the collection container 17 in the recovery tank 16.
The treated washing water that has passed through is returned to the auxiliary separation tank 14 via a second reflux path 19 equipped with a third pump _P3 , and from the separation tank 9 to the recovery tank 1.
6, the paint slag in the wash water is separated and collected as follows.

Figure 1 shows the normal operating condition, where the first pump P ₁
By this operation, the circulation of cleaning water between the cleaning device on the booth 1 side and the separation tank 9 is continued, and the treated cleaning water W from which paint slag has been separated and removed is continuously supplied to the cleaning device.

Also, by operating the second pump _P2 , the auxiliary separation tank 1
The treated washing water W from No. 4 is continuously returned to the separation tank 9, and accordingly, the overflow at the first weir 12 continues, and the floating paint slag in the separation tank 9 is sequentially transferred to the auxiliary separation tank 14 and accumulated. .

In this state, the third pump _P3 is stopped and there is no overflow at the second weir 15.

In the figure, (ON) indicates that the pump is in operation, and (OFF) indicates that the pump is in stopped state.

Figure 3 shows a state in which the collection of floating paint slag has started, and the auxiliary separation tank 14 is in the above-mentioned normal operating state.
When a certain amount of floating paint slag accumulates on the 3rd pump
Start driving _P3 .

Through the operation of the third pump _P3 , the treated wash water W stored in the recovery tank 16 is returned to the auxiliary separation tank 14, and as a result, overflow at the second weir 15 is started, causing accumulation of water in the auxiliary separation tank 14. The floating paint slag is transferred to a collection container 17, and the collected paint slag is drained in the collection container 17.

Then, as shown in FIG. 4, when most of the floating paint slag accumulated in the auxiliary separation tank 14 has been transferred to the collection container 17, the third pump _P3 is stopped, and then, as shown in FIG. The overflow of water has disappeared, and
Waiting for the drainage and separation in the collection container 17 to be completed, the collection container 17 is taken out, the collected paint slag is appropriately processed, and the collection container 17 is newly placed in the collection tank 16.
is accommodated and returns to the normal operating state shown in FIG.

As shown in FIGS. 3 to 5, even in the process of collecting floating paint slag accumulated in the auxiliary separation tank 14 into the collection container 17, the first pump _P1 and the second pump
_P2 continues to operate, supplying cleaning water to the cleaning equipment,
In addition, the transfer and accumulation of floating paint slag from the separation tank 9 to the auxiliary separation tank 14 is continued.

Figure 6 shows the state in which the wash water treatment operation has been stopped in conjunction with the shutdown of booth 1, and each pump P ₁ ,
To stop P ₂ and P ₃ , all or part of the cleaning water W stored in the storage tank 8 in the cleaning device falls into the separation tank 9 side, and the water levels in the separation tank 9, auxiliary separation tank 14, and recovery tank 16 rise. However, due to the partition wall 20 provided at the inlet part where the overflow water from the first weir 12 flows into the auxiliary separation tank 14, the auxiliary separation tank 14 and the recovery tank 1 are separated.
The floating paint slag that has already moved to the 6 side is prevented from flowing back to the separation tank 9 side.

In addition, although the collection container 17 is submerged in water in FIG. 6, the collection container 17 is submerged when the booth operation is stopped.
It is also possible to raise it above the water surface.

Container 1 for collecting floating paint slag accumulated in auxiliary separation tank 14
The operation of the third pump P ₃ when shifting to 7 is as follows:
Although this is automatically performed based on information from a water surface monitoring center 21 such as an ultrasonic type installed in the auxiliary separation tank 14, various problems such as problems occurring with the water surface monitoring sensor 21 may occur. Due to a problem, a situation occurred in which the accumulated floating paint slag in the auxiliary separation tank 14 could not be transferred to the collection container 17. Therefore, repairs for the problem were carried out while stopping any further accumulation of floating paint in the auxiliary separation tank 14. When it becomes necessary to carry out work, as shown in FIG. 7, during the repair work, the second pump _P2 is stopped to stop the flushing water from flowing from the separation tank 9 to the auxiliary separation tank 14. During the repair work, the 1st pump P ₁
The operation continues, and while the paint slag floats and separates in the separation tank 9, the supply of cleaning water to the cleaning device is maintained.

Note that the separation tank 9 has a storage capacity ten to several dozen times that of the auxiliary separation tank 14.
Since the floating capacity of the floating paint slag is quite large compared to the above, the floating paint slag is separated by continuing circulation of cleaning water between the cleaning device and the separation tank 9 while stopping the flow of the floating paint slag to the auxiliary separation tank 14. There is no particular problem even if the flotation and separation of paint slag in tank 9 is continued for a long time.

Washing water W supplied downstream from a storage tank 8 in a washing device via a waterway 10 and an auxiliary separation tank 1
Washing water W returned from 4 through the first reflux path 18
As shown in FIG. 2, in order to cause the washing water W to flow into the separation tank 9, the water channel 10 and the 1. The outlet of the reflux passage 18 is arranged.

In other words, from the viewpoint of collecting floating paint slag in the separation tank 9, the first weir 12 is arranged locally on the tank wall.
In this case, there are areas where floating paint slag tends to accumulate depending on the position on the surface of the pooled water. Therefore, as described above, by generating the surface flow f toward the first weir 12 over a wide area using the inflow washing water W, the accumulation of floating paint slag is prevented and the floating paint slag accumulation efficiency is increased.
As a result, the paint slag separation and collection efficiency is improved.

Similarly, in the auxiliary separation tank 14, the outlet of the second reflux path 19 is arranged so that a surface flow f toward the second weir 15 is generated by the inflow of washing water from the second reflux path 19, and the outflow port of the second reflux path 19 is It is designed to promote the flow of floating paint slag to 17.

[Another example]

Next, another embodiment of the present invention will be described.

[] As shown in FIG. 8 A to E, the second weir 15 is located at a higher level than the inlet through which the overflowing water from the first weir 12 flows into the auxiliary separation tank 14, and the treated cleaning tank 16 is A second reflux path 19 is provided to return the water W to the separation tank 9, and the following (i) to
The paint slag may be separated and collected as in (iii).

(i) In the normal operating state, as shown in FIG. 8A, the first pump _P1 continues to circulate and supply cleaning water to the cleaning device. Further, by operating the second pump _P2 , the first weir 12 continues to overflow, and the floating paint slag in the separation tank 9 is transferred to the auxiliary separation tank 14 and accumulated.

(ii) The first pump P ₁ and the second pump P ₂ are stopped when the operation of booth 1 is stopped, and
As the water levels in the separation tank 9 and the auxiliary separation tank 14 rise due to the washing water W stored in the storage tank 8 in the cleaning device falling to the separation tank 9 side, as shown in the order of B, C, and D in FIG. 8, A porous collection container 1 in which floating paint slag accumulated in the auxiliary separation tank 14 along with overflowing water at the second weir 15 was stored in a collection tank 16
Transfer to step 7 and drain.

At this time, the partition wall 20 prevents the paint slag floating on the auxiliary separation tank 14 from flowing back to the separation tank 9 side.

(iii) When restarting the operation of the booth 1, the first pump P ₁ and the second pump P ₂ are operated to lower the water level in the separation tank 9 and the auxiliary separation tank 14 as shown in FIG. First
Weir 12 will resume overflowing, and the third pump will be restarted.
_P3 is operated to return the treated wash water W in the collection tank 16 to the separation tank 9, and then the normal operating state is returned.

In short, the floating paint slag that is floated and separated during booth operation and accumulated in the auxiliary separation tank 14 is collected in the collection container 17 at the end of each day's booth operation.

[] As shown in FIG. 9 A to D, an auxiliary storage tank 19a is provided to temporarily store the treated cleaning water W in the recovery tank 16, and the treated cleaning water W in the recovery tank 16 is transferred to a third pump P. ₃ , the flow path 19b is transferred to the auxiliary storage tank 19a, and the stored cleaning water W in the auxiliary storage tank 19a is transferred to the fourth pump.
A flow path 19c is provided to transfer the water to the separation tank 9 by the operation of P ₄ , and then a second reflux is performed in which the treated washing water W in the recovery tank 16 is returned to the separation tank 9 through the flow paths 19b, 19c and the auxiliary storage tank 19a. Road 19
may be configured to separate and collect paint slag as described in (i) to (iii) below.

(i) In normal operating conditions, as shown in Figure 9A, the first pump _P1 continues to circulate and supply cleaning water to the cleaning device, and the second pump
By operating the pump P ₂ , water continues to overflow at the first weir 12 and the floating paint slag in the separation tank 9 is transferred to the auxiliary separation tank 14 side.
The water level of the recovery tank 16 is maintained higher than the second weir 15, and the floating paint slag 14 from the separation tank 9 and the recovery tank 16 are collected.

(ii) When a certain amount of floating paint sludge accumulates in the auxiliary separation tank 14 and the recovery tank 16, as shown in Figs.
As shown in FIG. 3, the third pump _P3 is operated to lower the water level in the collection tank 16, and thereby,
Auxiliary separation tank 1 with overflow effect at second weir 15
The floating paint slag in the auxiliary separation tank 14 and the recovery tank 16 is collected into the collection container 17 while the floating paint slag on the 4 side is flowing into the collection container 17.

() Then, as shown in FIG. 9(d), after replacing the collection container 17, the third pump _P3 is stopped and the fourth pump _P4 is started to operate the cleaning water W stored in the auxiliary storage tank 19a. is returned to the separation tank 9 to raise the water levels in the auxiliary separation tank 14 and recovery tank 16, and then the normal operating state returns.

Incidentally, as shown in FIG.
7, the first pump P ₁
The operation of the second pump _P2 continues, and the supply of cleaning water to the cleaning device and the transfer and accumulation of floating paint slag from the separation tank 9 to the auxiliary separation tank 14 are continued.

As mentioned above [] and [], the separation tank 9, the first weir 12, the auxiliary separation tank 14, the second weir 15, and
Various improvements can be made to the specific manner in which the wash water is transferred through the recovery tank 16.

Further, instead of configuring the auxiliary separation tank 14 as a single tank, it may be configured as a plurality of tanks in which washing water is sequentially flooded and floating paint slag is transferred and accumulated.

As the cleaning water, various aqueous solutions or liquid agents can be used in addition to simple water.

The paint slag separation and collection device according to the present invention can be applied to various types of cleaning devices that remove paint components such as paint lumps and paint mist using cleaning water as an accessory device for painting equipment.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

1 to 7 show embodiments of the present invention,
FIG. 1 is a system diagram, FIG. 2 is a plan view, and FIGS. 3 to 7 are diagrams for explaining the operating mode. 8th
Figures A to H are diagrams for explaining operating modes in other embodiments of the present invention. FIGS. 9A to 9D are diagrams illustrating operating modes in other embodiments of the present invention, respectively. 9...Separation tank, 11...Circulation path, 12...First
Weir, 14...Auxiliary separation tank, 15...Second weir, 16
...Recovery tank, 17...Collection container, 18...First reflux path, 19...Second reflux path.

Claims (1)

[Claims] 1. A separation tank 9 is provided to receive discharged washing water from a washing device that removes paint components with washing water and to float and separate paint slag from the stored washing water, and the treated washing water is supplied from the separation tank 9 to the washing device. The paint sludge separation and collection device is provided with a circulation path 11 for separating and collecting paint slag, and is provided with a first weir 12 for draining floating paint sludge together with overflowing water from the separation tank 9, and an auxiliary separation tank for receiving overflow from the first weir 12. 14 is provided, and a second weir 15 is provided to allow floating paint slag to flow out together with overflow water from the auxiliary separation tank 14, and a porous collection is provided to receive overflow water from the second weir 15 and drain and separate paint slag from the received overflow water. A recovery tank 16 for accommodating a container 17 is provided, a first reflux path 18 for returning treated wash water from the auxiliary separation tank 14 to the separation tank 9 or the cleaning device, and a first reflux path 18 from the recovery tank 16 to the auxiliary separation tank 14. Alternatively, a paint sludge separation and collection device is provided with a second reflux path 19 for returning treated washing water to the separation layer 9.