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Cold rolling tempering lubricant waste water treatment device and treatment method thereof

A wastewater treatment and leveling liquid technology, which is applied in metallurgical wastewater treatment, flotation water/sewage treatment, water/sewage multi-stage treatment, etc., can solve serious pollution, difficult treatment of wastewater chemical stability, relatively large water quality changes, etc. problems, to achieve the effect of less investment, good effluent water quality, and low operating costs

Active Publication Date: 2012-05-23
MCWONG ENVIRONMENTAL TECH CORP LTD
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the leveling process, the leveling liquid wastewater is regularly discharged. Although the discharge of this type of wastewater is not large, it causes relatively large changes in water quality. The COD (chemical oxygen demand) concentration of the leveling liquid wastewater is as high as several thousand or even tens of thousands. Contains pollutants such as oil and surfactant; at the same time, this type of wastewater has good chemical stability, difficult treatment, and extremely serious pollution

Method used

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  • Cold rolling tempering lubricant waste water treatment device and treatment method thereof
  • Cold rolling tempering lubricant waste water treatment device and treatment method thereof
  • Cold rolling tempering lubricant waste water treatment device and treatment method thereof

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Embodiment Construction

[0042] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0043] Such as figure 1 Shown, a kind of cold-rolled leveling fluid waste water treatment device, it comprises: adjusting tank 1, coagulation reaction tank 2, CAF air flotation tank 3, anaerobic treatment unit 4 and MBR membrane biological reaction unit 5; Its cold rolling leveling liquid wastewater The processing method includes the following steps:

[0044] (1) Transport the leveling liquid wastewater to the regulating tank for oil recovery treatment, which is used to reduce the COD concentration and oil content in the leveling liquid wastewater;

[0045] (2) transporting the leveling liquid waste water treated in step (1) to the coagulation reaction tank, carrying out coagulation reaction in the coagulation reaction tank, absorbing the suspe...

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Abstract

The invention aims to disclose a device and a method for processing wastewater of cold-rolled leveling liquid. Floating oil in the levelling liquid wastewater is removed through a barrate oil receiving device; the dissolved or emulsified oil is removed through a high-efficiency CAF air floating pool, thereby having little investment and low operating expenses and saving occupied area; the water coming out from the CAF air floating pool enters an anaerobic treatment unit and an MBR membrane biological reaction unit; the water firstly passes through the anaerobic treatment unit, and the anaerobic treatment unit is used as pretreatment of an aerobic treatment unit, thereby avoiding the temperature problem met by aerobic treatment in the prior process and problems that certain organism can not be degraded under the aerobic condition, has overhigh load and impacts load and ensuring that aerobic outlet water is stable and meets the standard; the concentration of organism in the water can bereduced below 100 mg / LCODcr; and the treated water quality reaches first level standard stipulated by Integrated Wastewater Discharge Standard of People's Republic of China (GB8978-1996), thereby realizing the aim of the invention.

Description

technical field [0001] The invention relates to a waste water treatment device and a treatment method thereof, in particular to a treatment device and a treatment method for treating waste water containing leveling liquid (skin leveling liquid) in cold rolling of a steel mill. Background technique [0002] The tempering process is an important process in the production process of cold-rolled steel plates in steel mills, and it is the cold finish rolling process of strip steel after recrystallization annealing. The wet leveling process in the leveling process can better ensure the realization of the leveling elongation of the cold-rolled steel plate, and at the same time can better clean off the dirt on the surface of the cold-rolled steel plate, improve the cleanliness of the strip surface, and keep the tempering machine and The cleaning of each roll surface of the finishing unit avoids defects such as roll marks caused by impurity intrusion and adhesion of impurities, and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/24C02F1/40C02F9/14C02F1/52C02F3/28C02F103/16
CPCY02E50/30
Inventor 任翱张平
Owner MCWONG ENVIRONMENTAL TECH CORP LTD
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