Treating and recycling method for waste water of lead-acid battery industry

A technology for lead-acid batteries and industrial wastewater, applied in the field of water treatment, can solve the problems of low recovery rate of produced water, unfavorable industrialization, cumbersome steps, etc., and achieve the effects of low input cost, filtering harmful substances, and simple process steps

Inactive Publication Date: 2013-03-20
SHANGHAI WENDING WATER TREATMENT ENG +2
View PDF6 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fresh water recovery rate of this method is less than 70%, and the concentration of lead in the concentrated water reaches 3 times of the original after being circulated, so there are potential safety hazards when used as washing and cooling water
[0006] Patent CN102020374A adopts coagulation sedimentation + reverse osmosis to treat lead-acid wastewater. The water quality after treatment is good and can be reused. More cumbersome, not conducive to industrialization

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
  • Treating and recycling method for waste water of lead-acid battery industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment one, the processing lead concentration is 10mg / L, pH value is 2, COD Cr The process steps of lead-acid wastewater with a total hardness (calculated as calcium carbonate) of 30mg / L, a total hardness (calculated as calcium carbonate) of 200mg / L, and a conductivity of 3500mg / L are as follows:

[0037] (1) Pretreatment: Add a certain amount of lye to the pretreatment tank containing lead-acid wastewater, so that the pH value of lead-acid wastewater reaches 8.0, and then add 220mg / L polyferric sulfate to the pretreatment tank in turn, 4.0mg / L anionic polyacrylamide, the molecular weight of the anionic polyacrylamide is 13 million;

[0038] (2) Ultrafiltration membrane treatment: transport the precipitated supernatant from the pretreated lead-acid wastewater in step (1) to the ultrafiltration membrane treatment system for treatment. The ultrafiltration membrane is made of polyethersulfone, and the operating pressure of the ultrafiltration membrane is set to 0.5MPa...

Embodiment 2

[0041] Embodiment two, processing lead concentration is 150mg / L, pH value is 1.0, COD Cr The process steps of lead-acid wastewater with a total hardness (calculated as calcium carbonate) of 80mg / L, a total hardness (calculated as calcium carbonate) of 620mg / L, and a conductivity of 6500mg / L are as follows:

[0042] (1) Pretreatment: Add a certain amount of lye to the pretreatment tank containing lead-acid wastewater, so that the pH value of the lead-acid wastewater reaches 8.5, and then add 130mg / L polyaluminum chloride to the pretreatment tank in turn , 8.0 mg / L anionic polyacrylamide, the molecular weight of the anionic polyacrylamide is 6 million;

[0043] (2) Ultrafiltration membrane treatment: The pretreated lead-acid wastewater in step (1) is transported to the ultrafiltration membrane treatment system for treatment. The ultrafiltration membrane adopts the US GE ultrafiltration membrane The filter membrane is made of polyvinylidene fluoride, and the operating pressure o...

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

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
hardnessaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of water treatment and specifically to a treating and recycling method for waste water. The treating and recycling method for waste water of the lead-acid battery industry comprises the following steps: (1) pretreatment: a step of controlling the pH value of plumbic acid waste water to be in a range of 8 to 9 by using alkali lye and then adding a flocculating agent and a coagulant aid; (2) treatment with an ultrafiltration membrane: a step of conveying supernatant liquid which is obtained after deposition of the waste water treated in step (1) to an ultrafiltration membrane treatment system for treatment; and (3) treatment with a reverse osmosis membrane: a step of conveying supernatant liquid which is obtained after deposition of the waste water treated in step (2) to a reverse osmosis membrane treatment system for treatment. With such a technical scheme, the method provided in the invention has the advantages of simple steps and low investment cost and can not only effectively filter harmful substances in the waste water but also control water quality to allow the water quality to reach standards for recycling and reusing.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a wastewater treatment and reuse method. Background technique [0002] With the pull of related industries in the country and the increase of investment in China by international battery manufacturers, the lead-acid battery industry has grown rapidly and has been widely used not only in traditional fields such as transportation, military and national defense, but also in solar photovoltaic power generation, wind power generation, Communication power supply, power transformation and distribution system, railway, ship communication, starting, lighting power supply, UPS power supply, making it one of the emerging sunrise industries, as of July 31, 2011, engaged in the production, assembly and recycling of lead-acid batteries ( Secondary lead) enterprises have more than 1930. However, due to reasons such as imperfect pollution prevention and control facilities, about 583 com...

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): C02F9/04
CPCY02W10/37
Inventor 张建鹏杨晓玲钟丽云许嘉龙王伟萍
Owner SHANGHAI WENDING WATER TREATMENT ENG
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