Zero emission technology for wastewater

A zero-discharge, waste water technology, applied in the direction of water pollutants, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of high material requirements, complex pretreatment, and equipment prone to fouling, etc. Achieve the effect of simple recycling and simple pretreatment

Inactive Publication Date: 2018-01-16
上海缘脉环境科技有限公司
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some traditional technologies are used in the treatment of these wastewaters. The system equipment requires complex pretreatment and is prone to fouling, which makes the equipment unable to operate stably. The equipment used must be resistant to high salt corrosion and has high requirements for materials.

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
  • Zero emission technology for wastewater
  • Zero emission technology for wastewater
  • Zero emission technology for wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The technical features of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0025] Such as figure 1 As shown in the zero-discharge wastewater process, high-salt water and high-COD water are pretreated by E1 and then enter E2. The concentrated water treated by E2 enters E4 for evaporation and crystallization. The fresh water flowing out of E2 enters E3 for concentration and recovery, and E3 flows out. The fresh water is sent to a suitable water point.

[0026] Specific steps are as follows:

[0027] (1) Pretreatment: Pass waste water (high brine and high COD water) through a laminated filter; remove particles with a particle size greater than 100 microns;

[0028] (2) Forward osmosis: The pretreated wastewater is passed through a forward osmosis membrane; the FO draw solution used is a sodium chloride solution with a mass percentage concentration of 2%-28%;

[0029] (3) After passing through the FO membrane, the obt...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a zero emission technology for wastewater. The technology comprises steps as follows: (1), pretreatment: the wastewater passes through a segmented filter, and particulate matter with grain size larger than 100 mu m is removed; (2), FO (forward osmosis): the pretreated wastewater passes through an FO membrane; (3), concentrated wastewater obtained after the pretreated wastewater passes through the FO membrane is subjected to low-temperature evaporative crystallization by a low-temperature evaporative crystallizer; an FO light draw solution obtained after the wastewater passes through the FO membrane is pumped into a high-salt concentration membrane by a high-pressure pump; produced concentrated water is taken as a draw solution to be recovered, and produced fresh water is taken as industrial water. The technical scheme has beneficial effects as follows: 1, pretreatment is simple; 2, the draw solution is recovered with the high-salt concentration membrane technology, the recovery is simple, and no chemical is required to be added; 3, the low-temperature evaporative crystallizer is driven by air in the evaporation process, and required temperature is about 30 DEG C and is the lowest temperature for evaporation in current water treatment industry.

Description

Technical field [0001] The invention relates to a waste water treatment method, in particular to a waste water zero discharge process, belonging to the technical field of environmental protection. Background technique [0002] Since the "Ninth Five-Year Plan", my country has concentrated its efforts on comprehensive improvement of the "Three Rivers and Three Lakes" and other key river basins. Since the "Eleventh Five-Year Plan", we have vigorously promoted pollution reduction and water environmental protection has achieved positive results. However, the serious situation of water pollution in my country has not been fundamentally contained. Regional, compound, and compressed water pollution has become increasingly prominent and has become the most prominent factor affecting my country's water security. The prevention and control situation is very severe. To this end, twelve departments including the Ministry of Environmental Protection and the Development and Reform Commission jo...

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): C02F9/10C02F101/10
Inventor 陈伟许心武
Owner 上海缘脉环境科技有限公司
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