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

Back-washing regeneration method of ceramic membrane method brine refining process filter

A brine refining and filtering technology, which is applied in chemical instruments and methods, fixed filter element filters, filtration and separation, etc., can solve problems such as dirty mud removal, affecting the high-flux production capacity of ceramic membranes, and affecting normal production, etc. Achieve the effects of increasing energy consumption, prolonging the regeneration cleaning cycle, and prolonging the production running time

Inactive Publication Date: 2010-11-03
河北盛华化工有限公司
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the five chlor-alkali enterprises that use sea salt as raw material have high recoil frequency, unclean desilting, and membrane tubes on the primary filter side are easily blocked by salt mud and fibrous objects in coarse brine during production and operation, resulting in The primary filtration pressure is as high as 0.5MPa or more. Due to the small pressure difference, recoil failure (recoil pressure 0.45-0.5MPa; primary normal working pressure 0.35-0.4MPa) the filter flux decays, and the phenomenon that the filter has to be stopped for regeneration and cleaning
The regeneration and cleaning cycle is short, usually 7-10 days, and the production and operation efficiency is low, which affects the high-flux production capacity of the ceramic membrane and seriously affects the normal production

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
  • Back-washing regeneration method of ceramic membrane method brine refining process filter
  • Back-washing regeneration method of ceramic membrane method brine refining process filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] When salt mud and fibrous impurities form ceramic membrane tubes to bridge and block the initial stage, backwash regeneration should be carried out. The specific steps are as follows:

[0013] a. When the filtration pressure on the primary side of the filter rises to 0.45MPa, close the refined brine outlet valve, isolate unqualified brine from entering the refined brine system, stop the operation of the filtration circulation pump, and reduce the pressure on the end face of the primary inlet membrane tube to 0.15-0.2 MPa.

[0014] b. Open the bottom valve of the first-stage side sewage of the filter and the return valve of unqualified brine, and turn on the first-stage feed pump, so that the coarse brine flows from the second stage to the reverse direction of the first stage at a pressure of 0.2-0.28MPa, and the flow rate is 0.7m / s , to form a brine back flushing pressure difference of 0.12-0.15MPa, to separate the salt mud agglomeration and impurities on the inner wall...

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 relates to the technical field of chlor-alkali chemical industry production, in particular to a back-washing regeneration method of a ceramic membrane method brine refining process filter; the ceramic membrane method primary brine filtering refining process is a novel refined brine filtering production process in chlor-alkali industry brine refining process at home and abroad; at present, the process has the disadvantages of high back-washing frequency and unclean silt removal, and a primary filtering side membrane pipe is easy to block by bridging brine sludge in crude brine and fiber matters, so as to cause the primary filtering pressure to be raised to above 0.5MPa, stopping is needed to carry out regeneration cleaning, and the normal production is affected. In the invention, crude brine is adopted and flows backwards from two grades to one grade, and back-washing is carried out for a plurality of times forcibly at the refined brine side, one-grade filtering pressure of the filter can be reduced below 0.3MPa, normal production is restored, and the production running time can be increased.

Description

technical field [0001] The invention relates to the technical field of brine refining technology in chlor-alkali chemical industry, in particular to a backwash regeneration method for a ceramic membrane method brine refining process filter. Background technique [0002] The ceramic membrane primary brine refining process is a new type of refined brine filtration production process in the brine refining process of the chlor-alkali industry at home and abroad. This process is popularized in domestic chlor-alkali industry in primary brine refining due to its advantages and characteristics such as short process flow, less equipment, less land occupation, low investment, low operating cost, and less auxiliary chemical refining agent. At present, the five chlor-alkali enterprises that use sea salt as raw material have high recoil frequency, unclean desilting, and membrane tubes on the primary filter side are easily blocked by salt mud and fibrous objects in coarse brine during pro...

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): B01D37/04B01D35/12B01D29/62C01D3/08
Inventor 孙占瑞王强康志恩王启蒙宋渊
Owner 河北盛华化工有限公司
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