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Treatment system for spraying tower sewage in automobile painting workshop and treatment method thereof

A technology of treatment system and spray tower, which is applied in the field of treatment system of spray tower sewage in automobile painting workshop, can solve the problems of reduced paint adsorption capacity and increased VOCs treatment cost, so as to save treatment costs, reduce treatment costs, and be economical. significant effect

Pending Publication Date: 2020-07-10
埃尔博工业设备(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Over a long period of time, the adsorption capacity of this kind of sewage to paint will be reduced, resulting in an increase in the cost of VOCs treatment

Method used

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  • Treatment system for spraying tower sewage in automobile painting workshop and treatment method thereof
  • Treatment system for spraying tower sewage in automobile painting workshop and treatment method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The COD of the spray tower sewage of a company's automobile painting workshop is 50000mg / L, and the daily production is 5m 3 / d. Adopt the treatment system of the present invention to process sewage, steps and produced water COD value are as follows:

[0068] (1) Input the sewage from the spray tower of the automobile painting workshop into the flocculation reaction tank 1, and the amount of flocculant added is 2000g / t. During the reaction process, continuous stirring was required, and after the reaction was completed, it was left to settle for 30 minutes to obtain the first product water.

[0069] (2) Input the first produced water into the filter press 2, the filtration accuracy of the filter press is 5 μm, and the water inlet flow rate is 0.3m 3 / h, the second product water and solid particles are obtained after pressure filtration.

[0070] (3) Input the second produced water into the electrocoagulation device 3, the anode of the device is an aluminum electrode, ...

Embodiment 2

[0080] For the sewage discharged by the same company, flocculation reaction, electrocoagulation reaction, electro-Fenton treatment and electrocatalytic treatment are carried out in sequence. After adding flocculant and filtering, the COD of the first product water obtained is ≤ 30000mg / L; after electrocoagulation and filtration, the COD of the third product water is ≤ 10000mg / L; the COD of the fourth product water obtained after Fenton treatment is ≤ 7500mg / L; After 1 hour of normal electrocatalysis, the COD of the sixth product water obtained can be degraded by 80-90%, that is, COD≤1125mg / L, which cannot meet the emission standard.

[0081]If emission standards need to be met, the catalytic time must be increased. Due to the high power of catalytic equipment and the increase of catalytic time, it not only affects the treatment capacity of sewage in the system, but also increases the treatment cost. Therefore, it is necessary to carry out the electrocatalytic reaction before ...

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Abstract

The invention provides a treatment system for spraying tower sewage in an automobile painting workshop. The system comprises a flocculation reaction tank, a filter press, electric flocculation equipment, filtering equipment, first electro-catalysis equipment, Fenton treatment equipment and second electro-catalysis equipment which are connected in sequence. The invention also provides a method fortreating spraying tower sewage of the automobile painting workshop or water-based paint factory sewage by using the system. According to the system, up-to-standard discharge of the sewage can be achieved, meanwhile, the spraying tower of the paint spraying workshop adopts clean new water to adsorb VOCs every day, the VOCs treatment cost is reduced, the outsourcing treatment cost of the sewage is saved, and the economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a system for treating sewage from a spray tower in an automobile painting workshop, and a method for treating sewage using the system. Background technique [0002] The sewage of the spray tower of the automobile painting workshop is the sewage formed after the volatilized gas and floating dust in the workshop are sucked into the spray tower and absorbed by the water curtain of the spray tower during the process of automobile painting. The main pollutants in the sewage are water-based paint and suspended solids. The characteristics of the water quality are as follows: 1) The concentration of organic matter is high, and the chemical oxygen demand of the sewage is generally 50000mg / L. 2) The content of ammonia nitrogen is high, generally 5000mg / L. 3) The suspended solids (SS) value is relatively high, generally at 5000mg / L. [0003] At present, the sewage of automobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/30C02F103/14
CPCC02F9/00C02F1/5281C02F2001/007C02F1/001C02F1/463C02F2301/08C02F1/4672C02F2305/026C02F1/722C02F2201/46135C02F2101/30C02F2103/14C02F2209/06
Inventor 宋常红
Owner 埃尔博工业设备(北京)有限公司
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