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

Silica gel wastewater treatment method

A wastewater treatment and silica gel technology, which is applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve problems such as high cost, low process efficiency, and poor effect

Active Publication Date: 2019-08-06
SHANDONG JINHUI MEMBRANE TECH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low efficiency, high cost and poor effect of the existing silica gel pickling wastewater treatment process, the present invention provides a silica gel wastewater treatment method

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention is described below in conjunction with examples, which are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0020] Silica gel production wastewater with a silica gel content of 0.52%, a salt content of 2-3%, and a pH of 2-3, totaling 10 tons, will be harmlessly recycled and treated. The specific steps are:

[0021] 1) One-time pressure filtration: introduce the wastewater into the sedimentation tank, let it settle for 1 hour, pump out the wastewater containing a lot of sediment at the bottom, and perform pressure filtration. The pressure of the filter pressure is 0.4MPa, and 200kg of large-particle silica gel particle slurry containing water is separated. ;

[0022] 2) Immersion ultrafiltration: Negative pressure suction operation mode is adopted, the pore size of the ultrafiltration membrane used in the immersion ultrafiltration equipment is 0.0341 μm, and the material of the immersion ...

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 silica gel wastewater treatment method which comprises the steps of two times of filter presses, two times of ultrafiltration, three times of nanofiltration, evaporation crystallization and the like which are interpenetrated with each other. The method has the beneficial effects the the process of the silica gel wastewater treatment method can be recyclable, zero emissioncan be realized, and water, silica gel and inorganic salts in silica gel wastewater can be recovered; in the process, except for adding of pH adjusting substances, no other medicaments are added, andno other impurities are introduced, so the the process integration level is high, and the cost is saved; the silica gel wastewater treatment method adopts an enhanced submerged ultrafiltration film to pretreat the silica gel wastewater, does not need to adjust the pH value of the silica gel wastewater in the early stage, and can achieve the purpose of pretreatment by adjusting the pH value of nanofiltration produced water.

Description

technical field [0001] The invention relates to wastewater treatment, in particular to a silica gel wastewater treatment method. Background technique [0002] The wastewater generated during the silica gel preparation process mainly comes from the silica gel pickling process. The acidity of the pickling wastewater is high, and the pH value is 2-3. It contains a large amount of sulfate and silicate and residual silica gel, which makes the pickling wastewater difficult to treat. [0003] The existing silica gel pickling wastewater treatment process generally uses quicklime to adjust the pH first, and then adds flocculants, such as polyaluminum chloride, polyferric chloride, polyacrylamide, etc., to make the silicon-containing wastewater flocculate and precipitate, and then press filter to Solid-liquid separation. The above-mentioned treatment process will generate a large amount of solid waste, and introduce a large amount of calcium and magnesium impurities into the wastewat...

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): C02F9/10C01B33/14C02F103/34
CPCC01B33/14C02F1/001C02F1/04C02F1/442C02F1/444C02F1/66C02F9/00C02F2001/007C02F2103/34C02F2301/08Y02P20/10
Inventor 宋玉志张兵涛李爱波梁萍宋晓萌
Owner SHANDONG JINHUI MEMBRANE TECH
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