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Treatment method of aircraft paint surface cleaning wastewater

A technology for cleaning wastewater and treatment methods, which is applied in water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc. It can solve the problem of slow startup of activated sludge treatment system, difficulty in adapting to wastewater discharge and full recycling of water. Resources, poor biochemical treatment effect, etc.

Active Publication Date: 2020-10-20
CHINA RAILWAY CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wastewater has the characteristics of high organic matter content, poor biochemical treatment effect, and difficult removal of metal particles. If the general activated sludge sewage treatment process is adopted, the activated sludge treatment system starts slowly, the sludge settling performance is poor, and the effluent water quality fluctuates. It is difficult to adapt to the new industrial production requirements of aircraft assembly plants to reduce waste water discharge and fully recycle water resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A treatment method for cleaning wastewater before aircraft painting, comprising the following steps:

[0030] (1) Collection and adjustment of waste water; all the self-water, overflow and empty waste water containing pollutants produced by the cleaning treatment before aircraft painting are collected by the drainage ditch, and then pumped into the waste water adjustment tank through the ground waste water pump to adjust the water in the tank An aeration device and a stirring device are provided for oxygenating and stirring the wastewater to adjust the water volume and homogenize the water quality, and reduce the impact of the fluctuation of the water volume and water quality on the subsequent treatment steps;

[0031] (2) Pretreatment of wastewater; the wastewater in the wastewater regulating tank passes through the grid to separate large solid particles and then enters the mixing reaction tank. In the mixing reaction tank, alkaline substances are first added to make the ...

Embodiment 2

[0047] A treatment method for cleaning wastewater before aircraft painting, comprising the following steps:

[0048] (1) Collection and adjustment of waste water; all the self-water, overflow and empty waste water containing pollutants produced by the cleaning treatment before aircraft painting are collected by the drainage ditch, and then pumped into the waste water adjustment tank through the ground waste water pump to adjust the water in the tank An aeration device and a stirring device are provided for oxygenating and stirring the wastewater to adjust the water volume and homogenize the water quality, and reduce the impact of the fluctuation of the water volume and water quality on the subsequent treatment steps;

[0049] (2) Pretreatment of wastewater; the wastewater in the wastewater regulating tank passes through the grid to separate large solid particles and then enters the mixing reaction tank. In the mixing reaction tank, alkaline substances are first added to make th...

Embodiment 3

[0070] A treatment method for cleaning wastewater before aircraft painting, comprising the following steps:

[0071] (1) Collection and adjustment of waste water; all the self-water, overflow and empty waste water containing pollutants produced by the cleaning treatment before aircraft painting are collected by the drainage ditch, and then pumped into the waste water adjustment tank through the ground waste water pump to adjust the water in the tank An aeration device and a stirring device are provided for oxygenating and stirring the wastewater to adjust the water volume and homogenize the water quality, and reduce the impact of the fluctuation of the water volume and water quality on the subsequent treatment steps;

[0072] (2) Pretreatment of wastewater; the wastewater in the wastewater regulating tank passes through the grid to separate large solid particles and then enters the mixing reaction tank. In the mixing reaction tank, alkaline substances are first added to make th...

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Abstract

A method for treating aircraft paint surface cleaning wastewater, comprising the following steps: (1) collection and adjustment of wastewater; (2) pretreatment of wastewater; (3) biological treatment of wastewater; (4) treatment of sludge: (5) ) Reuse of wastewater. The treatment method of the present invention can efficiently and environmentally friendly treat the cleaning wastewater generated before the aircraft assembly is painted, while ensuring the quality of the effluent water, the treatment process can be flexibly changed according to the composition of the cleaning wastewater, and the recovery of wastewater resources can be realized use.

Description

technical field [0001] The invention relates to the field of industrial waste water treatment, in particular to a treatment method for waste water generated during aircraft paint surface cleaning. Background technique [0002] With the development of society and economy, the demand for long-distance travel and cargo transportation is increasing. Large-scale aircraft have attracted the attention of various countries due to their good economy, safety and convenience, and have become the development direction of the aviation industry. Large aircraft are huge in size and have many parts and components. They need to be processed and manufactured in stages, and then transported to the general assembly plant, where they are assembled and debugged according to the needs of the flight, and finally painted and delivered. The segmented structure of the aircraft usually needs to be sprayed with a primer after the factory is manufactured, and then a temporary protective layer is applied ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/001C02F1/02C02F1/24C02F1/5281C02F1/766C02F3/1268C02F3/28C02F9/00C02F2001/007C02F2101/30C02F2209/22C02F2303/04
Inventor 陈超王英苏辉冯逸喆晁毅熊永志
Owner CHINA RAILWAY CONSTR ENG GRP
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