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

High salt wastewater softening and concentrating device and method

A high-salt wastewater and concentration device technology, which is applied in chemical instruments and methods, descaling and water softening, multi-stage water/sewage treatment, etc., can solve the problems of high price and softener waste, and reduce the input volume and cost , reduce the dosage and cost, and reduce the effect of wastewater flow

Pending Publication Date: 2019-06-07
DATANG ENVIRONMENT IND GRP
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned softening methods all require excessive dosage of oxalic acid or oxalate. Due to the high price of such agents, these methods inevitably lead to excessive waste of softeners.

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
  • High salt wastewater softening and concentrating device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, what described in embodiment 1 of the present invention is a kind of high-salt wastewater softening and concentrating device, and this device comprises:

[0037] The coagulation tank 3 is connected to the softening tank 2 at its inlet, and the outlet of the coagulation tank 3 is connected to the inlet of the microfiltration system 4;

[0038] Ultrafiltration system 23, its inlet port is connected with the outlet port of microfiltration system 4, and the outlet port of ultrafiltration system 23 is connected with nanofiltration system 7 inlet ports;

[0039] Reverse osmosis system 13, its inlet end is connected with the outlet end of nanofiltration system 7, and the outlet end of reverse osmosis system 13 is provided with reverse osmosis water production pipeline 18 and reverse osmosis concentrated water pipeline 19;

[0040] The inlet of the electrodialysis system 14 is connected to the reverse osmosis system 13 through the reverse osmosis con...

Embodiment 2

[0053] What described in embodiment 2 of the present invention is a kind of high-salt wastewater softening and concentrating method, this method comprises:

[0054] Step 1. Transport the high-salt wastewater to the softening pool 2, and add medicine A, medicine B and medicine to the softening pool 2 through the first dosing pipeline 1, the second dosing pipeline 10 and the third dosing pipeline 11 respectively C, Ca in high-salt wastewater 2+ The reaction with the agent B is precipitated and separated, and the sediment is discharged through the mud discharge pipe 9, and the softened wastewater is obtained in the softening tank 2. The agent A is hydrochloric acid or sodium hydroxide, and the pH value of the wastewater in the softening pool 2 is controlled to be between 6.0-7.5; the agent B is sodium oxalate, and the molar concentration of the oxalate in the wastewater in the softening pool 2 is controlled to be equal to the molar concentration of calcium ions. 1.2-2.0 times; a...

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 high salt wastewater softening and concentrating device and method. The device comprises a coagulating tank, whose outlet end is connected to the inlet end of a micro filtration system; an ultrafiltration system, whose inlet end is connected to the outlet end of the micro filtration system, wherein the outlet end of the ultrafiltration system is connected to the inlet endof a nano filtration system; a reverse osmosis system, whose inlet end is connected to the outlet end of the nano filtration system, wherein the outlet end of the reverse osmosis system is connectedto a reverse osmosis produced water pipeline; and an electrodialysis system, whose inlet end is connected to the reverse osmosis system, wherein the outlet end of the electrodialysis system is connected to an electrodialysis concentrated water pipeline. The invention also relates to a method that uses the device mentioned above to carry out high salt wastewater softening and concentrating. The provided method and device can selectively separate Ca<2+> from wastewater and recover excess softening agent; the addition amount of softening agent is reduced, the cost is reduced therefore, and high-rate concentration of wastewater is realized.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a high-salt wastewater softening and concentrating device and method. Background technique [0002] In recent years, the treatment and discharge of domestic industrial wastewater is being subject to increasingly strict management and restrictions. Among many types of industrial wastewater, high-salt wastewater is due to its high salt content, large discharge volume, and corrosiveness to metals (such as Cl - Corrosion) and other characteristics, direct discharge will cause serious harm to the ecological environment, so its zero discharge has become the focus of attention in the industry. At present, membrane concentration is one of the most important pretreatment technologies to achieve zero discharge of high-salt wastewater. 2+ and Mg 2+ It is very easy to cause fouling of the filter membrane, so the necessary softening treatment must be performed on the wastewater fir...

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): C02F9/12C02F5/00
Inventor 李飞刘海洋谷小兵陈海杰夏爽
Owner DATANG ENVIRONMENT IND GRP
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