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

Method and device for treating silicon-containing wastewater

A waste water treatment, waste water technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of unstable effluent quality, low removal rate of dissolved silicon, high requirements for reaction conditions, etc. problem, to achieve the effect of convenient source of medicine, good application prospect, and thorough removal of silicon

Active Publication Date: 2019-08-13
GO HIGHER ENVIRONMENT GRP CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a method and device for treating silicon-containing wastewater, which solves the problem of low removal rate of dissolved silicon in the existing coagulation silicon removal method, high requirements for reaction conditions, poor effect of silicon removal in wastewater, large dosage of chemicals and poor quality of effluent water. stability problem

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
  • Method and device for treating silicon-containing wastewater
  • Method and device for treating silicon-containing wastewater
  • Method and device for treating silicon-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0063] The wastewater from a catalyst factory of a petrochemical enterprise is treated by using the method and device for treating silicon-containing wastewater of the present invention, and the specific method steps are as follows.

[0064] After the wastewater was preliminarily precipitated, the process of coagulation and silicon removal was carried out in the coagulation sedimentation tank, wherein all the agents were formulated into solutions, and the dosages are shown in Table 1. First add lime and PAC to the primary coagulation tank, stir for 20 minutes to mix uniformly, then add magnesium sulfate and PAM to the secondary coagulation tank, stir for 30 minutes to form alum flower settlement, after 2 hours of precipitation, the muddy water Separation yielded a clear supernatant. After testing, the effluent after the treatment of each example was analyzed for SiO 2 content, after calculation, the silicon removal rate of each embodiment is shown in Table 1.

[0065] Table ...

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 provides a treatment method and device for silicon containing wastewater to stably and effectively remove colloidal silicon and dissolved silicon from wastewater. The method mainly consists of the steps of: preliminary sedimentation for recovery part of silicon dioxide, first stage coagulation, adding of a coagulant to remove dissolved silicon and colloidal silicon in the wastewater; and second stage coagulation, adding of a coagulant aid and a magnesium salt to accelerate sediment growth with the precipitated sediment (sludge) as a contact medium; second stage sedimentation for solid-liquid separation and sedimentation of coagulated flocs. Through the synergistic effect of medicaments, the method and the device can achieve a best silicon removal effect, solve the problems of difficult settlement of SiO2 gel and high residual turbidity, the overall process has the characteristics of complete silicon removal, maturity, rational design, simple operation, low cost, and strong impact load endurance, the method and the device can effectively remove colloidal silicon and dissolved silicon from wastewater, and have good application prospects.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method and device for treating silicon-containing wastewater. Background technique [0002] At present, in the catalyst production process of the petrochemical industry, a large amount of silicon-containing wastewater is produced in the molecular sieve workshop, and the silicate contained in it is represented by SiO 2 It can reach 2.0%-4.0%, and it is quite stable. The silicon in the wastewater discharged from the production of catalysts is brought in by the raw material water glass, and the new ecological SiO in the reaction process 2 Initially in a crystalline state, a true solution is formed, but dissolved SiO 2 Has great polymerization ability and can gradually combine together to form a typical negatively charged SiO 2 colloidal solution. Colloidal silicon and dissolved silicon in water can be converted to each other. These wastewaters are generally alkaline and hav...

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 Patents(China)
IPC IPC(8): C02F9/04C02F101/10
Inventor 陈福泰
Owner GO HIGHER ENVIRONMENT GRP CO LTD
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