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System and process for reducing pollutant concentration of comprehensive wastewater from iron and steel enterprises

A pollutant concentration and comprehensive wastewater technology, which is applied in the system field of reducing the pollutant concentration of iron and steel comprehensive wastewater, can solve secondary pollution and other problems, and achieve the effect of improved removal rate and reasonable process and system settings

Pending Publication Date: 2020-02-21
鞍钢集团工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Desalination and reuse of industrial wastewater is a development trend in the industry, but this method does not remove pollutants, but transfers pollutants to concentrated brine, and the reuse of concentrated brine will inevitably cause secondary pollution

Method used

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  • System and process for reducing pollutant concentration of comprehensive wastewater from iron and steel enterprises

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Embodiment Construction

[0031] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0032] Such as figure 1 As shown, a system for reducing the concentration of pollutants in iron and steel comprehensive wastewater according to the present invention includes a regulating tank, a high-density sedimentation tank, a biological aerated filter, a denitrification biological filter, and a high-efficiency dissolved air Floating ponds, filters and ozone catalytic oxidation ponds; of which:

[0033] A liftable aerator is installed in the regulating tank;

[0034] The high-density sedimentation tank is provided with a drug dosing device, and the high-density sedimentation tank is provided with a sediment discharge port connected to a sludge treatment system through a pipeline;

[0035] The biological aerated filter is equipped with a fixed aerator, and the fixed aerator is connected to an air suspension fan through a pipeline;

[0036] T...

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PUM

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Abstract

The invention relates to a system and a process for reducing the pollutant concentration of comprehensive wastewater from iron and steel enterprises. The system comprises an adjusting tank, a high-density sedimentation tank, a biological aerated filter, a denitrification biological filter, an efficient dissolved-air flotation tank, a filter tank and a catalytic ozonation tank which are sequentially connected through a wastewater pipeline. According to the invention, pollutants in the wastewater can be thoroughly converted into non-polluting substances; the purpose of reducing the pollutant concentration is achieved; the requirement on the special emission limit value of water pollutants as described in Discharge Standard of Water Pollutants for of Iron and Steel Industry GB13456-2012 in table 3 is met; the water quality index of inlet water for double-membrane desalination and recycling is completely met; and the service life of desalination and recycling facilities is prolonged.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a system and process for reducing the concentration of pollutants in comprehensive iron and steel wastewater. Background technique [0002] Iron and steel enterprises are large water users and produce a large amount of production wastewater. The SS, COD, ammonia nitrogen, total nitrogen, fluoride, cyanide and other indicators in the wastewater are easy to exceed the standard and cannot be discharged directly. The use of desalination and reuse of industrial wastewater is the development trend of the industry, but this method does not remove pollutants, but transfers pollutants to concentrated brine, and the reuse of concentrated brine will inevitably cause secondary pollution. In addition, the double-membrane desalination method has strict requirements on the influent water, and the influent water quality is good, which can greatly improve the service life ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/14C02F101/16C02F101/20C02F103/16
CPCC02F9/00C02F2001/007C02F1/5245C02F1/727C02F1/56C02F3/30C02F3/34C02F1/24C02F1/725C02F1/78C02F2101/16C02F2101/14C02F2101/20C02F2103/16
Inventor 冯占立于丰浩杨冶张新宇王远志王军强杨志超刁振东王丹锫刘佳诚范丽丽程诺嘉
Owner 鞍钢集团工程技术有限公司
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