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Method and device for synchronously treating steel pickling waste water and coking waste water

A technology for iron and steel pickling and coking wastewater, applied in chemical instruments and methods, metallurgical wastewater treatment, sustainable biological treatment, etc., can solve the problems of high treatment costs, low treatment efficiency of internal pickling wastewater and coking wastewater, etc.

Active Publication Date: 2008-09-10
浙江汉蓝环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention aims to solve the technical problems of low treatment efficiency and high treatment cost of pickling wastewater and coking wastewater in iron and steel enterprises

Method used

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  • Method and device for synchronously treating steel pickling waste water and coking waste water
  • Method and device for synchronously treating steel pickling waste water and coking waste water
  • Method and device for synchronously treating steel pickling waste water and coking waste water

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Embodiment Construction

[0144] as attached figure 1 As shown, the pickling wastewater and coking wastewater were first mixed through the storage tank 1, and the pickling wastewater and coking wastewater were mixed in the storage tank 1 at a ratio of 1:80. The water quality analysis results before and after the mixing of the pickling wastewater and coking wastewater are shown in Table 1. Show

[0145] Table 1

[0146] Coking wastewater

Pickling wastewater

after mixing

pH

9.22

1.36

8.75

Volume ratio of sediment after 30min %

30

Total iron mg / l

5050mg / l

not detected

CODcrmg / l

3760.8

6395.7

3603.2

[0147] After mixing and sedimentation in the storage tank 1, take the supernatant, first pass through the air flotation device, pre-treat to remove oil, suspended solids and slag, and then pass through the primary aeration tank 2, primary sedimentation tank 3, facultative oxygen tank 4, and aerobic ...

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Abstract

The invention relates to a method for processing pickling wastewater and coking wastewater in steel industry synchronously and a device to carry out the method. The method comprises the following steps of: mixing pickling wastewater and coking wastewater in a cistern at a certain ratio with PH value of the mixture controlled between 7 and 9, selecting supernate after sedimentation for purifying treatment in the next stage of a biochemical system. The biochemical system comprises a primary aerator pool, a primary sedimentation pool, a facultative tank, an aerobic pool and a secondary sedimentation pool, the wastewater passes the primary aerator pool, the primary sedimentation pool, the facultative tank, the aerobic pool and the secondary sedimentation pool in the biochemical system in sequence, wherein the primary aerator pool, the facultative tank and the aerobic pool are added with microorganism bacterium flora and microorganism carriers. The device comprises the primary aerator pool, the primary settling pool, the facultative tank, the aerobic pool and the secondary sedimentation pool, and is characterized in comprising a cistern which is arranged ahead of the primary aerator pool and is provided with a stirring device and a spatula device inside. The invention is simple in technology procedures and is a method of 'treating waste with waste' and can treat the pickling wastewater and the coking waste water comprehensively.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, in particular to a method for synchronously treating pickling wastewater and coking wastewater in the iron and steel industry. Background technique [0002] The amount of pickling wastewater produced by the iron and steel industry is large and the pH is low. If it is discharged directly without treatment, it will not only acidify the surrounding water body or soil, and cause harm to the ecological environment of the surrounding area, but also waste a lot of resources and produce adverse social impacts. Will bear huge environmental pollution discharge costs. [0003] At present, the treatment methods adopted by the pickling wastewater treatment process in the iron and steel industry at home and abroad can be divided into three categories: recycling, comprehensive utilization and neutralization treatment. [0004] As far as recycling and comprehensive utilization are concer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/12C02F3/34C02F103/16
CPCY02W10/10
Inventor 凌亮
Owner 浙江汉蓝环境科技有限公司
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