JPS6249091B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating wastewater treatment device that removes paint sludge contained in wastewater from washing an object to be painted during a painting process.

As this type of device, a float pump is installed in a separation tank that receives paint sludge cleaning wastewater, and the pump sucks up paint sludge floating in the tank and supplies it to a paper filter, which processes it to improve separation efficiency and filtration. There are systems that improve the clarity of water, but in this case, the concentration of paint sludge sucked in by the float pump is uneven, so the processing capacity of the paper filter must be set at a high concentration treatment level at all times. , there is economic waste.

The present invention was made in order to improve the disadvantages of such a device, and it is designed so that paint sludge with a uniform concentration is always sent to the paper filter, and paint sludge that is below the processing level is sent to the paper filter. We are here to provide you with the equipment you need. To explain this with reference to the illustrated embodiment, the figure shows a paint wastewater treatment device in an automobile painting process, and shows a spray booth 1 in which an automobile body is to be painted.
A separation tank 3 connected to a separation tank 3 via a drainage channel 2 is connected to a stirring tank 5 by contact between a skimmer 4 inserted into the tank at the upstream side of the tank and sliding toward the downstream side. The wall body 6 is provided so as to extend between the left and right side walls of the separation tank 3 to form the rear wall 6a and the bottom wall 6b of the stirring tank 5. The skimmer 4 is provided so as to come into contact with the front end of the bottom wall 6b to form the front wall of the stirring tank 5, and a transfer pump 7 connected to the stirring tank 5 via the wall 6 is connected to the separation tank 3. A box 8 is provided to accommodate the
The stirring tank 5 is transferred to the stirring tank 5 via the transfer pump 7 inside the box 8.
is communicated with the paper filter 9. In addition, the separation tank 3 has a rear wall as a water level adjustment gate 10,
The separation tank 3 is communicated with the adjacent auxiliary bit 11 through the gate 10, and the auxiliary bit 11 is communicated with the spray booth 1 through the submersible pump 12 therein, and the paper filter 9 is connected to the transfer pump 13. It is communicated with the auxiliary bit 11 via the auxiliary bit 11.

In the figure, 14 indicates a stirrer.

Since the present invention is constructed as described above, the wastewater flowing into the separation tank 3 is adjusted by the PH adjusting agent and coagulation separation agent introduced at the point of inflow, and the paint sludge is coagulated and made non-viscous. The agglomerated and floated paint sludge is scraped up by a skimmer 4, and as the skimmer 4 comes into contact with the wall 6, a stirring tank 5 in which the paint sludge is scraped up is formed in the separation tank 3. Subsequently, the water level adjustment gate 10 was lowered to separate the paint sludge wastewater scraped into the stirring tank 5 from the wastewater in the separation tank 3, and the water was uniformly stirred by the agitator 14 in the stirring tank 5. The paint sludge is transferred to the paper filter 9 by the transfer pump 7 and is filtered. According to the present invention, a skimmer 4 and its counterpart are placed in the separation tank 3 that receives paint sludge cleaning wastewater. A wall 6 which is to form a stirring tank 5 by contacting the skimmer 4 is provided, and the stirring tank 5 formed by the wall 6 and the skimmer 4 is connected to a paper filter 9 via a pump 7. Since paint sludge of uniform concentration is always sent to the filter 9, the processing level of the paper filter 9 can be easily set, and the filter is not driven unnecessarily as in the conventional example described above.

[Brief explanation of the drawing]

The drawings are schematic diagrams showing one embodiment of the present invention. 3... Separation tank, 4... Skimmer, 5... Stirring tank, 6... Wall, 7... Pump, 9... Paper filter.

Claims (1)

[Claims] 1. A skimmer and a wall that is to form an agitation tank by contact with the skimmer are provided in a separation tank that receives paint sludge cleaning wastewater, and the agitation tank formed by the wall and the skimmer is pumped. A painting wastewater treatment device characterized in that it is connected to a paper filter through a paper filter.