JPH0252072A - Washing treatment apparatus in painting pretreatment process - Google Patents

Abstract

PURPOSE:To wash an object to be treated having a large amount of oils and fats adhered thereto by washing the same with clean washing water with the advance of said object by allowing the washing water supplied to a washing treatment tank to flow to the second and first sumps successively in the direction reverse to a conveyor advance direction. CONSTITUTION:The second shower washing chamber 4 equipped with the second sump 12 is arranged on a conveyor line 1 behind a washing treatment tank 5 in a conveyor advance direction and the first shower washing chamber 3 equipped with the first sump 11 is further arranged behind said chamber 4. The washing water overflowing from the washing treatment tank 5 is stored in the second sump 12 while the washing water overflowing from the second sump 12 or washing water supplied separately is stored in the first sump 11. Further, the stored washing water in the second sump 12 is sucked up to be supplied as the shower washing water of the second shower washing chamber 4 and the stored washing water of the first sump 11 is sucked up to be supplied as the shower washing water of the first shower washing chamber 3 and a degreasing agent is mixed with the first shower washing water if necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water washing treatment device for a pre-painting treatment process inserted into a conveyor line painting device or the like.

(Conventional technology) For example, the pretreatment process for a coating device using a conveyor line includes at least water washing, degreasing, water washing, and film formation.

Washing and drying processes must be placed on the line, which leads to longer lines and larger equipment, and requires costly processing facilities and large amounts of processing agents to purify waste liquid from degreasing and film formation. This is a factor that significantly increases painting costs.

There are products that improve this pretreatment process and omit the degreasing process. In other words, the temperature is 70℃, which is constantly supplied and drained quantitatively.
By adding cleaning power such as ultrasonic vibration to washing water at ~100℃ (the closer it is to pure water, the more effective it is) and immersing the processed material, it washes off oils and fats that have adhered during transportation. This makes it possible to shorten the conveyor line and downsize or omit waste liquid treatment equipment.Furthermore, by providing the same equipment for washing with water after film formation, the washing capacity can be increased and the drying process can be omitted.

However, while such a water washing device that also serves as degreasing is sufficiently effective in cleaning minute amounts of oil and fat as mentioned above, it is also used to remove large amounts of oil and fat for cooling and lubrication during processing, and for protection during transportation. There is a problem in that it may not always be possible to wash the adhering processed material sufficiently.

(Problem to be solved by the invention) In view of the above-mentioned problems, the purpose of this invention is to solve the following problems:
By using a water washing treatment device that uses washing water at 70°C to 100°C, it is now possible to wash processed materials that have a large amount of oil and fat attached, without sacrificing the advantages such as simplifying the process and downsizing the waste liquid treatment facility. The purpose of the present invention is to provide a water washing treatment device for a pre-painting treatment process.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the water washing device for the painting pre-treatment process of the present invention has a 70° C. ~100℃
In a water washing treatment device that is filled with washing water and allows the processed material to be immersed and passed through it to be transported by a conveyor, a second sump equipped with a second sump is provided on the conveyor line behind the water washing treatment tank in the direction in which the conveyor travels. 2 shower flushing chambers, and a first shower flushing chamber equipped with a first sump is arranged behind the first shower flushing chamber, and the washing water overflowing from the washing treatment tank is stored in the second sump, and the washing water overflowing from the second sump is is stored in the first sump, and the water stored in the second sump is pumped up and supplied as shower water injection into the second shower flushing room, and the water stored in the first sump is pumped up and supplied as shower water injection into the first shower washing room. It is pumped up and then mixed with a degreaser before being supplied.

(Function) With this method, the processed material transported by the conveyor line first enters the first shower washing room, where it is showered with shower water mixed with degreasing agent, and most of the attached oils and fats are removed. It gets washed away and comes back to the surface. g! : Since the glue is used while being injected into the shower, it is efficient, and by adjusting the amount of injection, the amount used can be minimized. The shake water returns to the first sump, and the wash water in the sump is contaminated with degreasing agents and oils, and the amount of contamination increases due to recirculation, but it is diluted by the washing water that constantly flows in from the second sump. Overall, the concentration is not that high.

Subsequent wastewater treatment is easy.

The treated product subsequently enters the second shower washing chamber, and in the second case, the washing water in the second sump is hot water that has flowed in from the washing treatment tank, so it has a strong washing power. Since the amount of degreasing agent brought here is extremely small, the concentration of the degreaser mixed into the second sump is extremely dilute, and it is further diluted by the constantly replenished washing water, making it possible to circulate and use the washing water from the second sump. There is no inconvenience caused by this.

Next, the treated product is immersed in a water washing treatment tank, and the remaining oils and fats are thoroughly washed away with the hot water, and the product is sent to the next step of film formation treatment.

(Example) DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings showing embodiments of the present invention will be explained below.

The figure is a process diagram of the painting pretreatment process.

A conveyor line 1 transports processed objects 2 suspended at appropriate intervals. Along this conveyor line 1, a first shower washing room 3, a second shower washing room 4, a washing treatment tank 5, a film conversion treatment tank 6, a third shower washing room 7, and a washing treatment tank 8 are arranged.
are arranged sequentially.

The water washing treatment tanks 5, 8 and the film conversion treatment tank 6 are formed in the shape of a boat bottom, and the conveyor line that passes over them is laid in a similar boat bottom shape, and the treated material 2 sequentially enters the tank and advances. .

1st. Second. The third washing room 3, 4.7 is tunnel-shaped, with shower nozzles 10 arranged on both sides, and the processing material 2.
passes between them. Also, at the bottom of each shower flush room 3, 4.7 are a first sump 1], a second sump 12, and a third sump.
3 is provided, and the wash water therein is pumped up by a pump 14 to supply the shower wash water to each shower nozzle 10. Shower wash water falls into each sump 11, 72, 13,
Supplied in circulation.

The washing treatment tank 5 is filled with washing water heated to 70° C. to 100° C. (chosen to be close to pure water) and drained.

The quantitative supply is performed using the steam and hot water described above, and this supply creates a flow in the direction opposite to the direction in which the conveyor travels. At the same time, the ultrasonic oscillator 15 applies ultrasonic vibrations to the washing water.

The wash water overflowing from the washing treatment tank 5 is stored in the second sump 2, and the wash water overflowing from the second sump 12 is stored in the first sump 1, where the overflowing wash water is discharged through the discharge pipe. The water is drained through 16.

In addition, in the first shower flushing room 1], a degreaser supply pipe 1 is installed in the middle of the pipe connecting the pump 14 and the shower nozzle ]1.
8 is connected to mix the required amount of degreaser into the shower wash water.

The water washing tank 8 has a temperature of 70"C like the water washing tank 5.
Washing water at ~100°C is quantitatively supplied and discharged and stored, and an ultrasonic oscillator 15 is provided. The overflow washing water is stored in the third sump 3 and is supplied to the third/lower washing room 7 as shower washing water.

The processed material 2 constructed as described above and transported along the conveyor line 1 is first washed in the first shower washing room 3 with washing water mixed with a degreasing agent to remove most of the adhering oils and fats. Then, it enters the second shower washing room 4, where it is washed with near boiling shower water, and then immersed in the washing water of the washing treatment tank 5 to thoroughly wash off oils and fats, and undergoes film conversion treatment. It is sent to tank 6.

The treated material 2 that has left the film chemical conversion treatment tank 6 is washed away with the film conversion solution in every corner by the third shower washing chamber 7 and the water washing treatment tank 8. The treated product 2 leaving the water washing treatment tank 8 is immediately naturally dried by incandescent heat and sent to the painting process.

Since the washing water supplied to the washing treatment tank 5 flows to the second sump 12 and the first sump 11 in the opposite direction to the conveyor traveling direction,
The processed material is washed with clean water as it progresses.

〔Effect of the invention〕

The water washing treatment device for the painting pretreatment process etc. according to this invention includes:
It has the above-mentioned configuration 1 effect, and can wash away large amounts of oils and fats adhering to the surface of the processed material using a minimum amount of degreasing agent, thereby shortening the conveyor line, pre-treatment process, and waste liquid treatment facility. This has the effect of reducing scale and reducing painting costs.

[Brief explanation of the drawing] The figure is a process diagram showing an embodiment of this invention.

Claims (1)

[Claims] In a water washing processing device, a long and narrow washing tank along a conveyor line is filled with washing water of 70°C to 100°C that is constantly and quantitatively supplied and drained, and the processed material transported by the conveyor is immersed in it and passed through. A second shower rinsing chamber equipped with a second sump is arranged on the conveyor line behind the rinsing treatment tank in the conveyor traveling direction, and a first shower rinsing chamber equipped with a first sump is arranged behind the second shower rinsing chamber, and the rinsing treatment tank The wash water that overflows from the second sump is stored in the second sump, and the wash water that overflows from the second sump or the wash water that is supplied separately is stored in the first sump, and this water is used as shower wash water for the second shower wash room. The stored washing water in the second sump is pumped up and supplied, and the stored washing water in the first sump is pumped up and supplied as shower washing water in the first shower washing room, and the first shower washing water is supplied with water as needed. A water washing treatment device for a painting pretreatment process, etc., which is characterized by mixing a degreasing agent.