Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for reuse of concentrated brine from coking wastewater

A technology for coking wastewater and concentrated brine, applied in the field of water treatment, can solve the problems of no coking wastewater reverse osmosis concentrated brine treatment and reuse reports, etc., and achieve good social and environmental benefits.

Active Publication Date: 2018-03-09
BAOSHAN IRON & STEEL CO LTD +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Check the existing patents and literature, there is no report on the treatment and reuse of coking wastewater reverse osmosis concentrated brine

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for reuse of concentrated brine from coking wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples.

[0041] The invention provides a method for reusing concentrated brine of coking wastewater, comprising the following steps:

[0042] (1) Organic matter pretreatment

[0043] First use O 3 / H 2 o 2 Oxidize the concentrated brine, the reaction time is 10-20min, the dosage of O3 is 5-30mg / L, the H 2 o 2 The dosage is 30~100mg / L, and the removal rate of COD after oxidation is 20~40%. At the same time, B / C(BOD 5 / COD) increased from 0.05 to 0.4~0.6; the chemically oxidized effluent enters the biological contact oxidation reactor for further treatment, the hydraulic retention time of the biological contact oxidation is 2~10h, and the effluent COD is below 80mg / L.

[0044] (2) filter

[0045] The effluent from the bioreactor enters the ...

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 provides a method for reusing concentrated brine from coking wastewater, comprising the following steps: organic pretreatment, physical and chemical treatment and biological treatment of the concentrated brine from coking wastewater to remove organic matter in the coking wastewater; filtering to remove particulate matter therein; scale inhibition pretreatment , adjust the pH of the concentrated brine of wastewater to 5-7; membrane distillation treatment, evaporation and crystallization treatment. In this method, the concentrated brine produced by reverse osmosis of coking wastewater is recycled to the production system, and the qualified water produced by membrane distillation and evaporation crystallization processes is used to convert the inorganic salt in the concentrated solution into crystals, thereby realizing zero liquid discharge of coking wastewater; The invention has double effects of economy and environmental protection, and has good social and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for reusing concentrated brine from coking wastewater. Background technique [0002] The treatment of coking wastewater has always been a major problem for iron and steel enterprises. The wastewater quality fluctuates greatly and has complex components. It contains dozens or even hundreds of organic and inorganic pollutants. The organic pollutants mainly include phenols, monocyclic and polycyclic aromatics. Group compounds and heterocyclic compounds containing nitrogen, oxygen, sulfur, etc.; inorganic pollutants mainly include ammonia nitrogen, thiocyanide, sulfide, and cyanide; and its biodegradability is poor, containing a large amount of refractory biodegradable substances. Some refractory metabolites will also be produced. At present, most enterprises adopt the combination of biological treatment and pre-physical and chemical treatment. The "Acc...

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 Patents(China)
IPC IPC(8): C02F9/14
Inventor 侯红娟尹婷婷张宜莓金学文李恩超任巍裘慕贤
Owner BAOSHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com