Ozone catalytic advanced treatment method and treatment device for cold rolling dilute alkali wastewater

A technology for advanced treatment of dilute alkali wastewater, applied in the field of water treatment, can solve the problems of high COD environmental pollution in biochemical effluent, achieve good social and environmental benefits, long service life, and easy to decompose

Active Publication Date: 2019-12-27
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the environmental pollution problem of high COD in cold-rolled dilute alkali biochemical effluent, the present invention provides an advanced treatment method and treatment device (system) for cold-rolled dilute alkali wastewater. Using the treatment system of the present invention, the one-time investment is low, The operation is simple, the production and treatment cost is low, and it is an environmentally friendly green and environmentally friendly treatment process for steel wastewater

Method used

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  • Ozone catalytic advanced treatment method and treatment device for cold rolling dilute alkali wastewater

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Embodiment 1

[0042] A cold-rolled dilute alkali wastewater ozone catalytic oxidation advanced treatment process system, water inlet tank, water inlet pump, liquid flow meter, ozone bubble tower reaction tower, oxygen cylinder, ozone generator, check valve, ozone diffusion distributor, ozone catalyst , Ozone gas outlet, outlet pool, outlet pump.

[0043] In this embodiment, the pH of the cold-rolled dilute alkali biochemical effluent before treatment is 8.7, the conductivity is 3760 us / cm, and the COD is 92 mg / L.

[0044] The cold-rolled dilute alkali biochemical effluent enters the water inlet pool through the pipeline. Then enter the ozone bubble tower reaction tower through the water inlet pump. The liquid flow meter with automatic control system controls the flow rate of cold-rolled dilute alkali biochemical effluent into the ozone bubble tower reaction tower. An ozone quencher is installed in the gas outlet at the top of the bubble tower to eliminate excess ozone so as not to dischar...

Embodiment 2

[0051] A cold-rolled dilute alkali wastewater ozone catalytic oxidation advanced treatment process system, water inlet tank, water inlet pump, liquid flow meter, ozone bubble tower reaction tower, oxygen cylinder, ozone generator, check valve, ozone diffusion distributor, ozone catalyst , Ozone gas outlet, outlet pool, outlet pump.

[0052] In this embodiment, the pH of the cold-rolled dilute alkali biochemical effluent before treatment is 6.9, the conductivity is 1790 us / cm, and the COD is 73 mg / L.

[0053] The cold-rolled dilute alkali biochemical effluent enters the water inlet pool through the pipeline. Then enter the ozone bubble tower reaction tower through the water inlet pump. The liquid flow meter with automatic control system controls the flow rate of cold-rolled dilute alkali biochemical effluent into the ozone bubble tower reaction tower.

[0054] The height-to-diameter ratio of the ozone bubbling reaction tower is 5:1, the superficial gas velocity is 0.15m / s, an...

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Abstract

The invention provides a method and device for ozone catalysis advanced treatment of cold rolling dilute alkali waste water. The method comprises the steps: cold rolling dilute alkali bio-chemical effluent enters a water inlet tank and enters an ozone bubbling reaction tower, and flow of the cold rolling dilute alkali bio-chemical effluent entering the ozone bubbling reaction tower is controlled through a liquid flowmeter; an ozonator generates ozone gas, and the ozone gas enters the ozone bubbling reaction tower; the flow of the ozone gas is controlled through a check valve, and water gas mixing is performed evenly in the ozone bubbling reaction tower through an ozone diffusion distributor; and after undergoing ozone catalytic ozonation, the cold rolling dilute alkali bio-chemical effluent enters a discharge tank to be discharged at a level of reaching the standard. By adopting the device and method for treatment, the one-time investment is low, the operation is simple, the production treatment cost is low, and the method is an environment-friendly steel waste water green treatment process.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a treatment method and a treatment device for efficiently removing organic pollutants in cold rolling dilute alkali wastewater. Background technique [0002] As my country's basic industry, the iron and steel industry has developed rapidly since the reform and opening up, and has been in a high-speed development stage in recent years. However, the iron and steel industry is an industry with high energy consumption, high resources and high pollution, and its water consumption is huge, accounting for about 14% of the national industrial water consumption. [0003] Cold rolling dilute alkali wastewater mainly comes from the oil depot drainage of various units such as rolling mill unit, grinding roll room and strip steel degreasing unit. The cold rolling dilute alkali oily wastewater after conventional treatment cannot meet the environmental protection discharge ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78B01J23/80
Inventor 李恩超丁宗琪邱煜张宜莓陈砚秋殷玫婕郑贻裕徐小龙赵雪兵
Owner BAOSHAN IRON & STEEL CO LTD
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