Coking wastewater treatment method

A treatment method and technology of coking wastewater, applied in natural water treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve problems such as high operating costs, increased wastewater discharge, and low water pass rate

Inactive Publication Date: 2010-02-10
KAILUAN ENERGY CHEM
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unstable index of the de-biochemical wastewater, there are some non-biochemical components, and bacterial poisoning often occurs, so that the pass rate of the biochemical water is low, and it is difficult to meet the standard. If the biochemical method is used for advanced treatment, the effect is still not very good, and Large investment, high operating costs
If the influent water is diluted before biochemical treatment and some clean water is added, it will cause an increase in the amount of discharged waste water

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0018] 1. Separating the coking wastewater with high pollutant content to the tar ammonia water tank.

[0019] 2. After separation, the ammonia water is sent to the ammonia distillation tower for ammonia distillation.

[0020] 3. The wastewater produced after ammonia distillation is biochemically treated. The biochemically treated wastewater contains COD: 100-300mg / l, phenol: 0.5-2mg / l, cyanide: 0.5-3mg / l, sulfide: below 1.0mg / l , Ammonia nitrogen: below 25mg / l.

[0021] 4. After coagulation and sedimentation, the effluent of the biochemical secondary sedimentation tank first enters the regulating tank, and the water quality is adjusted by the agitator in the regulating tank to ensure the stability of the water inflow in the subsequent process section, and then it is lifted into the sand filter for filtration. The sand filter is mainly used to remove most of the SS in the water to reduce the pollution of the ultrafiltration membrane, and the filtration speed is 6.5m / h.

[00...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a coking wastewater treatment method, which belongs to the technical field of wastewater treatment and is used for solving the problem that the coking wastewater treatment technology leads water quality to be difficult to achieve the standard. The coking wastewater treatment method comprises the steps of tar-ammonia water separation, ammonia distillation, biochemical treatment and the like, and wastewater after the biochemical treatment is treated according to the following steps after improvement: A. sequentially carrying out sand filtration, ultrafiltration and nanofiltration treatment on the wastewater treated biochemically, and carrying out secondary nanofiltration treatment on concentrated solution after the nanofiltration treatment; B. merging filtrate of twotimes of nanofiltration treatment, inputting into the step before the biochemical treatment step as biochemical diluted water or supplementary water of recycling water of a coking plant or being drained to outside; and C. inputting the concentrated solution of the secondary nanofiltration treatment into a tar-ammonia water separation slot in a coking gas purifying system or an ammonia water spraying system of a coke oven and mutually dissolving with tar ammonia water mixed solution. The method increases the membrane treatment based on the existing biochemical treatment for making up for congenital defects of biochemical treatment and is characterized by reasonable process, high purifying rate of wastewater treatment, comprehensive utilization of wastewater and the like.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating coking wastewater in the field of coal chemical industry, and belongs to the technical field of wastewater treatment. Background technique [0002] The coking wastewater produced in the production process of coal chemical enterprises has complex components, and is a toxic, harmful, and refractory high-concentration organic wastewater. It is very difficult to treat and has always been a technical problem in the field of wastewater treatment at home and abroad. At present, the treatment of coking wastewater is pretreated according to conventional methods, followed by biological treatment, and then the tertiary treatment of chemical treatment. However, indicators such as cyanide, COD and ammonia nitrogen in the treated wastewater are still difficult to meet the standards. In response to this situation, in order to solve the discharge of ammonia nitrogen, COD...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/44C02F103/34
Inventor 徐贺明房承宣谷志强张建敏李国忠孔卫徐建升葛丰华
Owner KAILUAN ENERGY CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap