Chemical injection control method and control device of chemical for treating circulating water in wet-type painting booth
A technology for treating chemicals and control methods, which is applied in the direction of flotation water/sewage treatment, flocculation/sedimentation water/sewage treatment, spraying devices, etc., which can solve the problems of rising cost of chemicals and achieve the effect of treatment
Inactive Publication Date: 2020-12-25
KURITA INDUSTRIAL CO LTD
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- Description
- Claims
- Application Information
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Problems solved by technology
However, the defoaming agent only defoams, and in this method, it is not possible to perform proper treatment of the paint (non-sticking, coagulation (primary coagulation), in-dent floating), it cannot be used as the fundamental countermeasure for the insufficient amount of circulating water treatment chemicals when the paint load increases
[0025] Anticipating rising paint loads and often overdosing recirculated water treatment chemicals drives up chemical costs
Method used
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Embodiment 1
[0108] exist figure 1 In the treatment device for the circulating water in the wet-type coating booth shown, the dosing control of the treatment agent based on the bubble height is performed according to the present invention.
[0109] The dosing control device of the circulating water treatment agent in the wet painting room uses automotive paint (water-based paint base) and the circulating water volume is 10m 3 / min, the average circulating water paint concentration of 100mg / L wet coating room circulating water treatment device, due to the mist spraying and discarding of paint, the paint load sometimes rises sharply from time to time.
[0110] figure 1 It is a partial configuration diagram of the circulating water tank 1 showing the installation part of the ultrasonic bubble sensor 2 and the dosing control part of the circulating water tank 1.
[0111] A rod 4 is erected upward from the upper part of a float 3 on the liquid surface of the circulating water tank 1 . The ro...
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On the basis of a measured value of the foaming amount of circulating water, specifically of the foaming height in the circulating water tank, chemical injection control of a treatment chemical is performed for detackifying, aggregating and floating paint in circulating water in a wet-type painting booth. When the measured value of the foaming height becomes greater than or equal to a prescribed value A set in advance, adding of the treatment chemical is started or the amount added of the treatment chemical is increased; when the measured value of the foaming height becomes less than or equalto a prescribed value B set in advance, adding of the treatment chemical is stopped or the amount added of the treatment chemical is reduced.
Description
technical field [0001] The invention relates to a method and a device for properly controlling the dosing of circulating water treatment chemicals in a wet coating room. Background technique [0002] In the coating process of the automobile industry, household appliances, and metal products manufacturing, various coatings are sprayed. Coatings used in industry are roughly divided into solvent-based coatings and water-based coatings, and each coating is used alone or in combination. [0003] Water-based coatings are roughly divided into three types: water-soluble type, water-dispersed type, and emulsion type. Since water-based coatings use water as a solvent (sometimes a part of the solvent is also used together), it has the advantages of non-flammability, safety and hygiene, and will not cause pollution due to organic solvents. Therefore, in recent years, the application range of water-based coatings Gradually expand. [0004] In the coating process in various industries ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C02F1/54B01D19/04B05B14/462B05B16/00C02F1/24C02F1/56
CPCC02F1/54C02F1/56C02F1/24B05B14/462B01D19/04B05B16/00
Inventor 吉田恒行福田贵大
Owner KURITA INDUSTRIAL CO LTD