Method for treating aircraft paint surface cleaning wastewater

A technology for cleaning wastewater and treatment methods, which is applied in water/sewage treatment, water treatment parameter control, biological water/sewage 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 sludge settling performance and other problems, to overcome the poor sludge settling performance, ensure the stability of effluent water quality, simple and convenient operation control

Active Publication Date: 2020-08-21
CHINA RAILWAY CONSTR ENG GROUP
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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

The invention discloses a method for treating aircraft paint surface cleaning wastewater. The method comprises the following steps: (1) collecting and adjusting of wastewater; (2) pretreatment of thewastewater; (3) biological treatment of the wastewater; (4) sludge treatment; and (5) wastewater recycling. According to the treatment method, the cleaning wastewater generated before paint spraying of an aircraft assembly can be efficiently treated in an environment-friendly mode, a treatment process can be flexibly changed according to component changes of the cleaning wastewater while the effluent quality is guaranteed, and recycling of wastewater resources can be achieved.

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 Applications(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 GROUP
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