Method and device for cooperative treatment of waste gas and wastewater from automobile repair factories

Abstract

The invention discloses a method for cooperative treatment of waste gas and wastewater from automobile repair factories. The method comprises the following steps: a. enabling the wastewater to entersa first absorption tower from the upper part of the first absorption tower, enabling the waste gas to enter the first absorption tower from the lower part of the first absorption tower, and completingthe absorption of the wastewater and the waste gas in the first absorption tower; b, enabling the waste gas discharged out from the first absorption to enter a second absorption tower from the lowerpart of the second absorption tower, enabling the wastewater discharged from the first absorption to be subjected to oil separation treatment and then enter the second absorption tower from the upperpart of the second absorption tower, adding activated carbon powder into a liquid phase in the second absorption tower, enabling ozone to enter the second absorption tower from the bottom of the second absorption tower, and enabling the waste gas and the wastewater to be subjected to an ozone catalytic oxidation reaction in the second absorption tower. The method can avoid the phenomenon of randomemission of the wastewater and the waste gas of the small and medium-sized automobile repairing factories, reduces pollution, and improves the treatment efficiency while reducing the cost of pollutant treatment.

Description

technical field [0001] The invention relates to a method for treating waste gas and waste water, in particular to a method for synergistic treatment of waste gas and waste water in auto repair plants, and also relates to a device for synergistic treatment of waste gas and waste water in auto repair plants. Background technique [0002] With the rapid development of the automobile industry, the corresponding automobile maintenance service industry has also been developed rapidly, but the environmental pollution caused by it has gradually attracted people's attention. The wastewater of the auto repair factory mainly includes: automobile cleaning wastewater, engine chassis disassembly workshop cleaning wastewater, paint spray water curtain spray wastewater, workshop cleaning wastewater and employee domestic wastewater, etc. These wastewater components are complex and contain petroleum (gasoline, diesel, engine oil, etc. etc.), suspended particulates (SS), anionic surfactants (L...

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Problems solved by technology

[0003] Auto repair enterprises are mostly medium, small and micro enterprises, distributed around cities and in urban and rural areas. Biological sewage treatment technology is highly specialized and requires experienced technicians to manage and operate, while auto repair companies have high mobility of employees, which is not conducive to the operation and management of their sewage treatment facilities

At the same time, the environmental climate also has a great influence on the physicochemical and biological methods. The temperature of the sewage directly affects the coagulation effect and microbial activity, especially in winter when the water temperature decreases. In order to ensure the treatment effect, the sewage generally needs to be heated, thereby increasing energy consumption.

[0004] At present, VOCs treatment technologies that are widely used mainly include adsorption, incineration, catalytic combustion and biotechnology, but these technologies are affected by investment, maintenance management, implementation conditions, etc., and cannot be well applied to urban auto repair plants

[0005] At present, the air quality in big cities still cannot meet the standards and public expectations. Although pollution control measures have been continuously taken, and the concentration of major air pollutants has decreased year by year, the total amount of air pollutant emissions still exceeds the environmental capacity.

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