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

Production method for desalination and comprehensive utilization of seawater

A production method, concentrated seawater technology, applied in chemical instruments and methods, seawater treatment, magnesium hydroxide, etc., can solve the problems of large climate impact, passive production, and many impurities and salts, and achieve the effect of solving discharge pollution

Inactive Publication Date: 2011-08-31
天津长芦汉沽盐场有限责任公司
View PDF7 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. It covers a large area, and drying salt in beach fields requires a lot of land resources, and the maintenance cost is high
[0005] 2. It is too affected by the climate, and the production is relatively passive
[0006] 3. There are too many impurity salts in chemical production and the cost is high

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
  • Production method for desalination and comprehensive utilization of seawater
  • Production method for desalination and comprehensive utilization of seawater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] a. Concentrate the concentrated seawater with a concentration of 4-6 〇 Be', when the temperature is above 20 ℃, permeates through the ionic membrane, separates the 1-valent ions from the 2-valent ions, and obtains concentrated seawater containing sodium chloride, potassium chloride and a small amount of calcium and magnesium salts and magnesium sulfate, calcium sulfate 2-valent Salt fresh sea water, stored separately;

[0017] b. Mix the concentrated seawater obtained in the above steps with a concentration of 20 〇 Above Be', heating to 100°C-120°C, sodium chloride is precipitated, solid-liquid separation, solid phase is washed and dehydrated to become sodium chloride product, liquid phase is cooled and crystallized by cooling equipment, and potassium chloride product is produced;

[0018] c. the mother liquor obtained after making potassium in the step b is m...

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 production method for desalination and comprehensive utilization of seawater. The method comprises the following steps: permeating high- concentration seawater obtained after fresh water preparation through an ionic membrane, separating out specific ions, and making into various sea salt chemical products by adopting a heating and evaporation manner, thus realizing the comprehensive utilization of seawater, achieving zero emission and playing a positive role in protecting the environment. In the invention, inorganic double-decomposition reaction is carried out on fresh seawater containing magnesium sulfate and calcium sulfate to obtain corresponding calcium and magnesium products and fresh water, thus completely solving the problem of pollution emission. Furthermore, mother liquor after potassium production can be oxidized and distilled to obtain bromine products, and waste liquor after bromine production can be finally processed into the calcium and magnesium products, thus completely converting seawater into chemical products and further achieving the purpose of zero emission.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of seawater, and more specifically relates to a production method for comprehensive utilization of seawater desalination. Background technique [0002] Desalination of seawater means that seawater condenses the secondary steam into fresh water through multi-effect evaporation, but at the same time the seawater is concentrated, and directly discharged into the sea will pollute the seawater. Generally, seawater desalination projects are equipped with salt factories and chemical plants of corresponding scale. The concentrated seawater is dried in beach fields to produce raw salt, and the mother liquor is re-dried, concentrated and then sent to chemical plants to produce potassium chloride, magnesium chloride, products such as bromine. [0003] The main disadvantages of this production method are: [0004] 1. It covers a large area, and drying salt in beach fields requires a lot of land reso...

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): C02F9/04C01D3/06C01F5/14C01F11/46C01B7/09C02F1/44C02F103/08
CPCY02A20/131
Inventor 李树生任杰吴宗生李洪王景波
Owner 天津长芦汉沽盐场有限责任公司
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