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

Technology for removing thallium with lead and zinc smelting flue gas washing waste acid water

A technology for polluted acid wastewater and smelting flue gas, which is applied in gaseous discharge wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve problems such as complex processes and achieve good application prospects.

Inactive Publication Date: 2015-03-25
ZHUZHOU SMELTER GRP
View PDF7 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is complex and not suitable for the treatment of lead-zinc smelting flue gas washing sewage acid wastewater

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
  • Technology for removing thallium with lead and zinc smelting flue gas washing waste acid water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The invention provides a treatment process for washing dirty acid waste water with flue gas from lead-zinc smelting. The technological process is to settle the flue gas washing dirty acid waste water into the homogenization tank, and then add the prepared vulcanizing agent from the pipe connecting the supernatant of the homogenization tank to the vulcanization reaction tank, so that the vulcanizing agent and the dirty acid can be fully and evenly mixed and reacted. The amount of vulcanizing agent used is 5-10 times the amount calculated by the chemical reaction formula of the mercury content in the polluted acid. Mercury removal is continued in the vulcanization reaction pool, and the reaction time is controlled to be no less than 1 hour.

[0021] After mercury removal, the polluted acid wastewater and the bottom flow filtrate after mercury removal enter the primary treatment part, and the pH value is adjusted to about 9 through calcium carbide mud, so that the Tl 3+ wi...

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 technology for removing thallium with lead and zinc smelting flue gas washing waste acid water. The technology comprises the steps of settling the flue gas washing waste acid water in an equalizing tank, adding sulfide into the equalized waste acid water to remove most mercury, then carrying out primary treatment, regulating a pH (potential of hydrogen) value of the waste acid water after mercury is removed, adding sulfide and a flocculant in sequence for press filtration, then carrying out secondary treatment, regulating the pH value of primary supernatant purified water to 11, adding sulfide and the flocculant in sequence, and removing thallium and heavy metal ions in depth via inclined plate settling. After the technology is employed, a thallium content in the lead and zinc smelting flue gas washing waste acid water is decreased to be less than or equal to 0.000005g / L, and the technology for removing the thallium is effective and strong in industrial applicability.

Description

technical field [0001] The invention relates to the field of lead-zinc smelting flue gas washing sewage acid wastewater treatment, specifically a lead-zinc smelting flue gas washing sewage containing one or more heavy metals such as thallium and cadmium, arsenic, mercury, lead, zinc, copper, etc. Acid treatment process. Background technique [0002] The waste acid treatment of lead-zinc smelting flue gas washing has always been a major problem in this industry, mainly because the waste water contains high acid content and more harmful heavy metal ions such as thallium, mercury, and arsenic. At present, there are few thallium removal processes that are applicable to the treatment of large amounts of wastewater in the lead-zinc smelting industry, and the thallium removal process in the lead-zinc smelting flue gas washing sewage acid is even blank in China. [0003] Thallium (Tl) is a rare dispersed metal and is a highly toxic heavy metal pollutant. Thallium poisoning can caus...

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): C02F9/04C02F101/20C02F103/18
CPCC02F9/00C02F1/56C02F1/62C02F1/66C02F2101/20C02F2103/18
Inventor 张天芳文杰李云新林文军伏东才李迪汉
Owner ZHUZHOU SMELTER 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