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

System and method for preparing large-particle anhydrous sodium sulphate as byproduct of nitrate-containing brine

A preparation system, a technology of nitrate brine, applied in the direction of alkali metal sulfite/sulfate purification, etc., can solve the problems of large energy consumption, achieve the effect of improving quality, optimizing the end point of salting-out reaction, and reducing residues

Active Publication Date: 2021-10-22
上海言征分离技术有限公司
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can obtain large particles of sodium sulfate, it mainly uses evaporation crystallization and cyclone separation. Cyclone separation itself needs gas-solid entrainment, so it requires a lot of energy consumption.

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 preparing large-particle anhydrous sodium sulphate as byproduct of nitrate-containing brine
  • System and method for preparing large-particle anhydrous sodium sulphate as byproduct of nitrate-containing brine

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] A kind of preparation system of the by-product large particle sodium sulfate containing nitrate brine, such as figure 1 As shown, it includes a membrane concentration unit 102 , a continuous flow salting out unit 103 , a suspension classification treatment unit 104 , a centrifugal unit 105 , a drying unit 106 and a sodium chloride suspension mixing unit 107 .

[0038] The membrane concentration unit 102 is provided with a nitrate-containing brine liquid inlet, a sodium sulfate concentrated solution outlet and a filtered clear liquid outlet, and is used for concentration of nitrate-containing brine;

[0039] The continuous flow salting-out unit 103 is provided with a sodium sulfate concentrated solution inlet, a top flow stream inlet, a sodium chloride suspension mixed liquid inlet, a sodium sulfate suspension material outlet and a finished product liquid outlet, and is used for salting out to prepare sodium sulfate Particle; the sodium sulfate concentrated solution inle...

Embodiment

[0071] Nitrate-containing brine produced by a domestic chlor-alkali factory: NaCl content 200g / L, Na 2 SO 4 The content is 42-67g / L.

[0072] The preparation system of the present invention containing nitrate brine by-product large particle sodium anhydride is as follows figure 2 As shown, the treatment capacity of nitrate-containing brine is about 1125m 3 / day, the output of large particle sodium sulfate is 4320kg / day.

[0073] a), after the nitrate-containing brine is collected, it is transported by the water delivery pump, and transferred to the water distribution tank of the water distribution unit 101 of the preparation system of the by-product of the nitrate-containing brine, which is a by-product of large grains of sodium sulfate. In the water distribution tank, the two are mixed to complete the ratio of sodium sulfate content in the brine to obtain high-nitrate brine with a NaCl content of 190-200g / L, Na 2 SO 4 content of 70-90g / L; the high-nitrate brine is trans...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a system and a method for preparing large-particle anhydrous sodium sulphate as a byproduct of nitrate-containing brine, brine is divided into a sodium sulfate concentrated solution and a filtered clear solution through a membrane concentration unit, then the sodium sulfate concentrated solution is fed into a continuous flow salting-out unit, and then a sodium sulfate suspension brine material obtained by the salting-out unit is subjected to stage treatment; the large-particle sodium sulfate is removed from the system, fine sodium sulfate particles is recycled back to the salting-out unit, the removed large-particle sodium sulfate is centrifuged and dried to obtain byproduct large-particle anhydrous sodium sulfate, and meanwhile, sodium sulfate crystal fine particles carried by airflow in the drying process are collected and reused in the salting-out unit. The method provided by the invention solves the problem of sodium sulfate enrichment in a total halogen ion membrane of a chlor-alkali enterprise, also solves the defects of poor production quality and poor product sales of the by-product anhydrous sodium sulphate at present, converts sodium sulfate in the brine into an industrial by-product, realizes clean production, and promotes the energy-saving and efficiency-increasing process of the chlor-alkali enterprise.

Description

technical field [0001] The invention relates to the technical field of sodium sulfate preparation, in particular to a preparation system and method for producing large-grain sodium sulfate by-product from nitrate-containing brine. Background technique [0002] The chlor-alkali industry has continued to expand production in recent years, and the use of ion-exchange membrane production has become a common production process in the industry. Because there is always a certain amount of sodium sulfate in the original salt, after a long period of electrolysis, sodium sulfate will continue to be enriched. Too high a concentration of sodium sulfate will have a serious impact on the electrolysis process, such as hindering the discharge of chloride ions. Oxygen reduces the current efficiency of the cell, so it is necessary to continuously and stably remove sodium sulfate from nitrate-containing brine in the actual production process. [0003] For the problem of sulfate removal, the m...

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): C01D5/16
CPCC01D5/16C01P2006/80C01P2004/60C01P2004/61Y02P20/10
Inventor 王厦
Owner 上海言征分离技术有限公司
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