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Combined treatment agent for wastewater produced during oily paint spraying and using method thereof

A treatment agent and waste water technology, which is applied in the field of spray paint waste water, can solve the problems such as difficulty in floating paint slag, limited adsorption capacity of activated carbon filter, high operating cost, etc.

Pending Publication Date: 2020-07-28
CHINA UNITED NORTHWEST INST FOR ENG DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional AB agent has unsatisfactory breaking effect and flocculation effect on paint slag. It is easy to adhere to equipment and structures, corrode equipment and structures, it is difficult to float paint slag, and it is difficult to salvage. The labor cost is high and the site environment is dirty. Mess; the ordinary sedimentation method can not destroy the viscosity of the paint slag, it is easy to adhere to the paint slag in the pool, and the paint slag will stick to the filter cloth when it enters the filter press, which will not only seriously affect the filter press effect, but also easily cause equipment failure
Filtration separation method has high investment, cumbersome maintenance and high operating cost. If the paint residue enters the quartz sand filter, it will cause the filter material to harden or cause the quartz sand filter to cut off or laminar flow. The adsorption capacity of the activated carbon filter is also limited, so frequent cleaning is required. Replace the filter material

Method used

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  • Combined treatment agent for wastewater produced during oily paint spraying and using method thereof
  • Combined treatment agent for wastewater produced during oily paint spraying and using method thereof
  • Combined treatment agent for wastewater produced during oily paint spraying and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The components of the paint mist breaker are based on the amount (n) ratio of melamine: formaldehyde: hydrochloric acid: urea: water = 1:2:1.2:0.5:3.5, and the reaction temperature is between 60 and 70°C. Made in 4h;

[0054] The coagulation aid is prepared as a 10wt% medicament solution;

[0055] The coagulant is prepared into a medicament solution of 2wt‰;

[0056] Take 400ml of water sample, add 5ml of viscosifier, stir slowly clockwise at a constant speed, fine suspended particles begin to appear in the water sample, then add 3.5ml of coagulant aid, stir slowly at a uniform speed clockwise, the fine suspended particles in the solution begin to flocculate into small groups, The water quality starts to become clear, finally add 3.5ml coagulant, and stir slowly clockwise at a constant speed. At this time, the fine suspended particles in the solution begin to coalesce into large flocs, and sink slowly, and the stratification is obvious. At this time, the water quality ...

Embodiment 2

[0061] The components of the paint mist breaker are based on the amount (n) ratio of melamine: formaldehyde: hydrochloric acid: urea: water = 1: 1.5: 1: 1: 3.4, and the reaction temperature is between 60 and 70 ° C. Made in 4h;

[0062] The coagulation aid is prepared as a 10wt% medicament solution;

[0063] The coagulant is prepared into a medicament solution of 2wt‰;

[0064] Take 400ml of water sample, add 5ml viscosifier, stir slowly clockwise, add 3.5ml coagulant, stir slowly clockwise, add 3.5ml coagulant, stir slowly clockwise.

[0065] Table 4 embodiment 2 water quality detection result

[0066] pH COD (mg / L) SS(mg / L) raw water 7.5 2500 200 Example 2 8.0 102.5 43 Removal rate / 95.9％ 78.5％

Embodiment 3

[0068] The components of the paint mist breaker are based on the amount (n) ratio of melamine: formaldehyde: hydrochloric acid: urea: water = 1.1:1:1.1:0.8:3, and the reaction temperature is between 60 and 70°C. Made in 4h;

[0069] The coagulation aid is prepared as a 10wt% medicament solution;

[0070] The coagulant is prepared into a medicament solution of 2wt‰;

[0071] Take 400ml of water sample, add 5ml viscosifier, stir slowly clockwise, add 3.5ml coagulant, stir slowly clockwise, add 3.5ml coagulant, stir slowly clockwise.

[0072] Table 5 embodiment 3 water quality detection result

[0073]

[0074]

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Abstract

The invention discloses a combined treatment agent for wastewater produced during oily paint spraying and a using method thereof. The combined treatment agent comprises a paint mist viscosity breaker,a coagulant aid and a coagulant, wherein the paint mist viscosity breaker is in a liquid state, the coagulant aid and the coagulant are in a solid powder state or liquid state, and a volume ratio ofthe paint mist viscosity breaker to the coagulant aid to the coagulant is (2-2.5): (1-1.5): (1-1.5). With the combined treatment agent of the invention, paint slag can be flocculated and settled at the bottom of equipment, the viscosity of the paint slag is thoroughly broken, the phenomenon of wall adhesion is avoided, and the problems that paint slag is difficult to fish out from paint spraying circulating water, treatment effect is poor, an automation degree is low, treatment cost is high and like in the prior art can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of spray paint wastewater, and in particular relates to a combined treatment agent for oily paint spray wastewater and a use method thereof. Background technique [0002] The spray paint wastewater mainly comes from the spray paint wastewater formed by transferring the water in the washing operation area of ​​the paint spray booth and the paint mist in the air of the spray booth to the circulating water. There are two main types of paints used in spray booths: oil-based paints and water-based paints. Oil-based paint is a type of paint with dry oil as the main film-forming substance. It mainly includes clear oil, thick paint, oil-based blending paint, oil-based anti-rust paint, etc. The oils used are mainly tung oil, linseed oil and catalpa oil. Dilution requires organic solvents. [0003] Therefore, oily paint spraying wastewater not only contains a large number of paint mist particles, suspended solids, a...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/52C02F103/14
CPCC02F1/56C02F1/5245C02F2103/14
Inventor 曾卉田进田伟张祜珍聂鸿雁党硕
Owner CHINA UNITED NORTHWEST INST FOR ENG DESIGN & RES
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