Method for reclaiming and utilizing paper-making industrial waste water

A technology for paper industry wastewater and industrial water treatment, which is applied in processing wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. , the effect of beautifying the environment

Inactive Publication Date: 2008-05-28
GOLD EAST PAPER JIANGSU
View PDF0 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These works are also being carried out in the papermaking industry, but they are limited to the combination of the main proces

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 for reclaiming and utilizing paper-making industrial waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] A kind of recycling method of papermaking industrial waste water of the present invention, it combines membrane technology and industrial water treatment technology together, comprises the following steps:

[0022] 1) Microfiltration process section: pre-treat the papermaking effluent after being treated by the biochemical system. The up-to-standard papermaking effluent first settles in the raw water pool, and then enters the self-cleaning filter in the microfiltration device through the lifting device to remove impurities in the raw water; The permeate A enters the next ultrafiltration process section, and the concentrated water containing impurities passes through the concentrated water tank and the concentrated water pump returns to the original chemical system for treatment.

[0023] The main purpose of the microfiltration process section is to remove suspended solids, colloids, chroma, turbidity, organic matter and other impurities in the raw water that hinder the n...

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 wastewater recycling method for paper making industry, and combines membrane technique with industrial water treatment technique. The invention comprises the steps of micro-filtration technique stage, an ultra-filtration technique stage and a reverse osmosis membrane technique stage. The micro-filtration technique stage can pretreat the discharged wastewater of paper making treated by a biochemical system, and remove the impurities of raw water. The ultra-filtration technique stage is used for the treatment of pretreated permeation liquid with ultra-filtration membrane, to further eliminate suspensions and macromolecular particulates. The reserve osmosis membrane technique stage is used for further pressurizing the permeation liquid and desalting through the reserve osmosis membrane and getting rid of COD, thus obtaining ultrapure water for a boiler used in production or permeation liquid used in paper making technique. The invention can thoroughly recycle water resource, and the indexes of the permeation liquid can reach the drinking standard of China, which can absolutely be applied to ultrapure water for the boiler used in production or paper making technique. The invention is applied to advanced recycling of discharged wastewater after wastewater treatment in paper making industry, and is also suitable for advanced recycling of discharged wastewater after wastewater treatment in such industries as printing and dyeing, iron and steel and chemical engineering, etc.

Description

technical field [0001] The invention relates to a method for recycling papermaking industrial wastewater, in particular to a method for advanced treatment of papermaking industrial wastewater by using membrane technology, recycling water resources, and realizing zero discharge. Background technique [0002] Papermaking wastewater has the characteristics of large discharge, complex pollutants, and difficult treatment. Most of them are treated by chemical precipitation, drug flotation, air flotation, and biological oxidation. At present, after being treated by the above-mentioned environmental protection facilities, most of these wastewater are discharged as discharge water. The part that is used for reuse is only treated by traditional three-stage treatment process (ie, dosing, sand filtration, carbon filtration, etc.) and then used as primary reuse water, which is only used for watering flowers, cleaning the ground, etc., and there are problems such as poor water quality, I...

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): C02F9/14C02F1/44C02F103/28
Inventor 李冠山
Owner GOLD EAST PAPER JIANGSU
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap