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

Method for treating hot galvanizing wastewater of metal product

A wastewater treatment and hot-dip galvanizing technology, which is applied in metallurgical wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of large equipment footprint, difficult indicators, cumbersome process, etc., to achieve Less times of oil washing, good flocculation and sedimentation effect, and large treatment flow effect

Pending Publication Date: 2022-03-22
安徽汇源镀锌有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Hot-dip galvanizing is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel parts first. In order to remove the iron oxide on the surface of the steel parts, acid After washing, it is cleaned in an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to a hot-dip galvanizing tank. Hot-dip galvanizing has uniform coating, strong adhesion and long service life. and other advantages, the traditional hot-dip galvanizing wastewater treatment process is not only cumbersome, the equipment occupies a large area, and the complex treatment process is difficult to quickly make various indicators meet the national standard, and special follow-up treatment is required, wasting resources

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 1

[0022] A method for treating hot-dip galvanizing wastewater of metal products, comprising the following steps:

[0023] (1) Wastewater pretreatment: pass the waste water to be treated through the grid pool and the grease trap in turn to obtain the pretreated waste water;

[0024] (2) Coagulation and sedimentation purification treatment: the pretreated wastewater obtained in step 1 enters the interior of the sump, adjusts the pH value, pumps it into the reaction tank, and obtains the secondary treatment liquid after the reaction;

[0025] (3) Reaction liquid purification treatment: pump the secondary treatment liquid prepared in step 2 into the multi-stage reaction tank, add alkali for neutralization, add coagulant to precipitate impurities, and obtain a tertiary treatment liquid;

[0026] (4) Purification treatment of the reaction solution: the impurities in the lower layer of the tertiary treatment solution prepared in step 3 are discharged into the sludge tank, and the super...

Embodiment 2

[0038] A method for treating hot-dip galvanizing wastewater of metal products, characterized in that: comprising the following steps:

[0039] (1) Wastewater pretreatment: pass the waste water to be treated through the grid pool and the grease trap in turn to obtain the pretreated waste water;

[0040] (2) Coagulation and sedimentation purification treatment: the pretreated wastewater obtained in step 1 enters the interior of the sump, adjusts the pH value, pumps it into the reaction tank, and obtains the secondary treatment liquid after the reaction;

[0041] (3) Reaction liquid purification treatment: pump the secondary treatment liquid prepared in step 2 into the multi-stage reaction tank, add alkali for neutralization, add coagulant to precipitate impurities, and obtain a tertiary treatment liquid;

[0042] (4) Purification treatment of the reaction solution: the impurities in the lower layer of the tertiary treatment solution prepared in step 3 are discharged into the slu...

Embodiment 3

[0054] A method for treating hot-dip galvanizing wastewater of metal products, characterized in that: comprising the following steps:

[0055] (1) Wastewater pretreatment: pass the waste water to be treated through the grid pool and the grease trap in turn to obtain the pretreated waste water;

[0056] (2) Coagulation and sedimentation purification treatment: the pretreated wastewater obtained in step 1 enters the interior of the sump, adjusts the pH value, pumps it into the reaction tank, and obtains the secondary treatment liquid after the reaction;

[0057] (3) Reaction liquid purification treatment: pump the secondary treatment liquid prepared in step 2 into the multi-stage reaction tank, add alkali for neutralization, add coagulant to precipitate impurities, and obtain a tertiary treatment liquid;

[0058] (4) Purification treatment of the reaction solution: the impurities in the lower layer of the tertiary treatment solution prepared in step 3 are discharged into the slu...

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 method for treating hot galvanizing wastewater of a metal product. The method comprises the following steps: (1) pretreating wastewater; (2) coagulating sedimentation purification treatment; (3) carrying out multi-stage reaction pre-precipitation; (4) purifying the reaction liquid; a finished product can be obtained; all indexes of the hot galvanizing wastewater treated by the method are far superior to those of the hot galvanizing wastewater treated by a traditional process, so that the hot galvanizing wastewater treated by the treatment process can be well purified.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a treatment method for hot-dip galvanizing wastewater of metal products. Background technique [0002] Hot-dip galvanizing is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel parts first. In order to remove the iron oxide on the surface of the steel parts, acid After washing, it is cleaned in an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to a hot-dip galvanizing tank. Hot-dip galvanizing has uniform coating, strong adhesion and long service life. and other advantages, the traditional hot-dip galvanizing wastewater treatment process is not only cumbersome, but the equipment occupies a large area, and the complex treatment process is difficult to quickly make ...

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): C02F9/04C02F1/52C02F1/54C02F103/16
CPCC02F9/00C02F1/5236C02F1/54C02F2103/16C02F1/001C02F1/40C02F1/66C02F2001/007C02F1/283
Inventor 姚道昌耿光金吴义山谷建华
Owner 安徽汇源镀锌有限公司
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