Quality-divided resourceful treatment method for coal chemical industry high-salt-content wastewater

A treatment method and high-salt technology, applied in the directions of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of low whiteness, high chromaticity and high concentration of wastewater, and reduce organic matter. Pollution, removal effect is good, water volume reduction effect

Inactive Publication Date: 2016-12-07
EAST CHINA ENG SCI & TECH +1
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another feature of the wastewater is that the CODcr concentration is high, reaching 500-2000mg/L, and the composition is complex, mainly composed of organic substances such as alcohols, alkanes, amines, indole, pyrimidine, ketones, acids, and lipids. An organic com

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
  • Quality-divided resourceful treatment method for coal chemical industry high-salt-content wastewater
  • Quality-divided resourceful treatment method for coal chemical industry high-salt-content wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The embodiment of the present invention is implemented in a Lurgi furnace coal-to-urea chemical plant. The coal chemical enterprise adopts the process of "biochemical treatment + reclaimed water + membrane concentration" to treat production and domestic wastewater, and has been running stably for about two years. The raw water of the embodiment of the present invention is taken from the reverse osmosis concentrated water tank of the concentrated brine station, the water volume is 3 m3 / h, the water quality: COD 600-900 mg / L, TDS 50000-60000 mg / L, Cl-18000-21000 mg / L, SO42- 9000-12000 mg / L, Na+ 16000-20000 mg / L, chromaticity 450-500 degrees.

[0018] First, the lifting pump 2 lifts the high-salt wastewater from the high-salt wastewater collection pool 1 into the electrolytic oxidation tank 3, and pumps it into the electrolytic tank 5 through the electrolytic oxidation circulation pump 4 for oxidation treatment, controlling the current 20A, voltage 8V, and hydraulic retenti...

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 discloses a quality-divided resourceful treatment method for coal chemical industry high-salt-content wastewater. The coal chemical industry high-salt-content wastewater enters an electrolytic oxidation device, a part of COD extremely difficult to degrade is removed, loop opening and chain scission are conducted on macromolecular organic matter, electrolytic oxidation device effluent enters an ozone catalytic-oxidation device to further remove the organic matter, ozone catalytic-oxidation device effluent enters a buffer pool to decompose residual ozone, wastewater in the buffer pool enters a nanofiltration device for separation, a main component on the nanofiltration produced water side is NaCl, main components on the nanofiltration concentrated water side are NaCl and Na2SO4, the nanofiltration produced water is further concentrate and reused through reverse osmosis, the concentrated water crystallizes by adopting a hot method, industrial-grade NaCl is recovered, and 'hot-method crystallization + freezing crystallization' is conducted on the nanofiltration concentrated water to recover industrial-grade Na2SO4. The quality-divided resourceful treatment method facilitates resource recovery, is stable and reliable in treating effect and moderate in construction, operation and maintenance cost.

Description

technical field [0001] The invention relates to a method for treating waste water with high salt content in coal chemical industry by quality and resource, and belongs to the technical field of environmental protection waste water treatment. Background technique [0002] my country is rich in coal resources, but oil and gas resources are relatively scarce. Therefore, developing the modern coal chemical industry, using coal as raw material to synthesize and produce clean energy products, partially replacing petrochemical products and fuel oil, will relieve the pressure of insufficient oil and gas resources in my country to a certain extent. The construction of modern coal chemical projects usually requires supporting large-scale coal bases of billions of tons, while the per capita water resources and water resources per unit land area of ​​my country's major coal producing areas are only 1 / 10 of the national level. Large-scale coal chemical projects consume more than ten ton...

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
IPC IPC(8): C02F9/10C01D5/00C01D3/04
CPCC01D3/04C01D5/00C02F1/04C02F1/22C02F1/441C02F1/442C02F1/4672C02F1/725C02F1/78C02F9/00
Inventor 王亮李强黄开东汪炎邢明皓尹程达刘华杰蒋佩娟
Owner EAST CHINA ENG SCI & TECH
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