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

System and method for extracting magnesium sulfate and sodium chloride from desulfurization wastewater

A technology for desulfurizing wastewater and magnesium sulfate, which is applied in the field of systems for extracting magnesium sulfate and sodium chloride, can solve the problems of aggravating smog, increasing coal consumption for power generation in power plants, affecting the utilization of fly ash in power plants, etc., so as to reduce the amount of sludge and increase resources. The effect of recycling and low operating costs

Pending Publication Date: 2021-03-05
国能朗新明环保科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the "low temperature flash evaporation + high temperature flue gas evaporation" process, the pollutants of desulfurization wastewater are finally evaporated by high temperature flue gas and mixed into the flue fly ash, which belongs to pollution transfer, affects the utilization of fly ash in power plants, and will increase the coal consumption of power plants for power generation
In addition, the wind and smoke system is an open cycle. Although most of the salt is attached to the dust and captured, the uncaptured salt will be discharged into the atmosphere with the flue gas, potentially exacerbating the risk of salt intensifying the smog;

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
  • System and method for extracting magnesium sulfate and sodium chloride from desulfurization wastewater
  • System and method for extracting magnesium sulfate and sodium chloride from desulfurization wastewater
  • System and method for extracting magnesium sulfate and sodium chloride from desulfurization wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] like figure 1 As shown, a system for extracting magnesium sulfate and sodium chloride from desulfurization wastewater includes a pretreatment device 1, a sodium chloride crystallization system 2 and a magnesium sulfate crystallization system 3 respectively connected to the pretreatment device 1;

[0084] Pretreatment device 1 comprises pretreatment device pool body 11, the pretreatment device water inlet 12 that is arranged on the pretreatment device pool body 11, the pretreatment device dosing port 13, is arranged on the pretreatment device pool body 11 and is positioned at the pretreatment device The pretreatment device supernatant liquid discharge port 14 on the opposite side of the water inlet 12 and the pretreatment device sludge discharge port 15 arranged at the bottom of the pretreatment device pool body 11, the pretreatment device dosing port 13 is used for dosing the incoming water The calcium and magnesium ions form the medicament for precipitation, and the po...

Embodiment 2

[0101] like figure 2 As shown, on the basis of Embodiment 1, a regulating pond 4 is also provided at the water inlet end of the pretreatment device 1, and the regulating pond 4 includes a regulating pond body 41, a regulating pond inlet pipe 42 arranged on the regulating pond body 41, The water outlet 43 of the water adjustment pool located on the body 41 of the water adjustment pool and located on the opposite side of the water inlet pipe 42 of the water adjustment pool;

[0102] The water inlet pipe 42 of the regulating tank is connected with the incoming water of the desulfurization wastewater, the water outlet 43 of the regulating tank is connected with the water inlet 12 of the pretreatment device, and the desulfurization wastewater enters the pretreatment device 1 after passing through the regulating tank 4;

[0103] The concentrated water port 223 of the nanofiltration and salt separation device is connected to the water inlet pipe 42 of the regulating tank.

Embodiment 3

[0105] like image 3 As shown, on the basis of Embodiment 2, the discharge port 313 of the sludge dewatering device is connected to the water inlet pipe 42 of the regulating tank.

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
Membrane poresaaaaaaaaaa
Login to View More

Abstract

The invention provides a system and a method for extracting magnesium sulfate and sodium chloride from desulfurization wastewater. The system comprises a pretreatment device, and a sodium chloride crystallization system and a magnesium sulfate crystallization system which are respectively connected with the pretreatment device. Desulfurization wastewater is softened by the pretreatment device to generate calcium and magnesium ion precipitate and supernatant, the supernatant is treated by a filtering device, a nanofiltration salt separation device, a concentration device and a crystallization device in the sodium chloride crystallization system to obtain sodium chloride crystals, and the calcium and magnesium ion precipitate is treated by a sludge dewatering device, a heating device, a secondary dewatering device, a second concentration device and a second crystallization device to obtain magnesium sulfate crystals. The method is a process technology provided by aiming at the salt characteristics of the desulfurization wastewater, and can be used for simultaneously recycling magnesium sulfate and sodium chloride in the desulfurization wastewater. Not only is the resource recycling increased, but also the amount of treated sludge is reduced. The method is an environment-friendly technology. Moreover, the adopted chemicals are common chemicals with low price, so that the operationcost is low.

Description

technical field [0001] The invention relates to the field of technical sewage treatment, in particular to a system and method for extracting magnesium sulfate and sodium chloride from desulfurization wastewater. Background technique [0002] At present, zero discharge of desulfurization wastewater from coal-fired power plants is a hot spot in my country's water environment protection. As the terminal wastewater of coal-fired power plants, desulfurization wastewater has high turbidity, high hardness, high salt content, many types of pollutants, and water quality fluctuations in different power plants. Large and other characteristics, it is very difficult to treat industrial wastewater. The traditional desulfurization wastewater treatment process can only remove suspended matter and heavy metal ions in the wastewater to meet the discharge standard of desulfurization wastewater. The wastewater also contains a large amount of salt, which will cause serious damage to the water envi...

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): C01D3/04C01F5/40C02F9/10C02F11/00C02F11/127C02F11/122C02F11/13C02F11/18C02F101/10C02F103/18
CPCC01D3/04C01F5/40C02F9/00C02F11/00C02F11/127C02F11/122C02F11/13C02F11/18C02F1/001C02F1/04C02F1/442C02F5/06C02F2101/10C02F2103/18C02F1/444C01P2006/80
Inventor 盛飞马跃华罗小红
Owner 国能朗新明环保科技有限公司
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