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

Method for simultaneously removing sulfur dioxide and nitrogen oxide in exhaust gas by twin tower tandem catalysis-biomembrane packing tower system

A technology for sulfur dioxide and nitrogen oxides, which is applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of insufficient purification efficiency of NOx and the limitation of comprehensive utilization channels, and achieve convenient and comprehensive utilization and expansion of comprehensive utilization The effect of the pathway

Inactive Publication Date: 2010-05-19
NANJING JIANGDAO INST OF ENVIRONMENT RES CO LTD
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this technical method adopts a biofilm packed tower system using a catalytic oxidation circulating spray liquid, that is, a single-tower purification system, its by-product is a mixed solution of sulfuric acid and nitric acid, and since the system is operated under acidic pH conditions, NOx The purification efficiency is not high enough
Although this by-product sulfuric acid and nitric acid mixture can be used to process and make fertilizers by adding ammonia and other substances, if the sulfuric acid and nitric acid in it are not separated, its comprehensive utilization will be greatly restricted

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 simultaneously removing sulfur dioxide and nitrogen oxide in exhaust gas by twin tower tandem catalysis-biomembrane packing tower system
  • Method for simultaneously removing sulfur dioxide and nitrogen oxide in exhaust gas by twin tower tandem catalysis-biomembrane packing tower system
  • Method for simultaneously removing sulfur dioxide and nitrogen oxide in exhaust gas by twin tower tandem catalysis-biomembrane packing tower system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0029] Examples 1 to 3: Using a double tower series catalytic-biofilm packed tower system to simultaneously remove SO from flue gas 2 And NOx and by-product sulfuric acid and nitric acid. 2 And NOx industrial waste gas for purification treatment experiments. The experimental device is composed of two biofilm packing tower systems with the same structure in series. The process is as follows figure 1 Shown.

[0030] The pH buffer used to adjust the pH of the circulating spray liquid is sodium bicarbonate (NaHCO 3 ) Prepared with NaHCO 3 10% buffer solution.

[0031] The special metal ion combination catalyst used is Fe-containing 2+ , Mn 2+ , Zn 2+ , Al 3+ The catalyst prepared by four kinds of metal ion sulfate, when added to the circulating spray liquid, Fe in the circulating spray liquid 2+ , Mn 2+ , Zn 2+ , Al 3+ The concentrations of the four metal ions are 0.5%, 0.2%, 0.5%, 1.0%, and the total concentration of metal ions is 2.2%.

[0032] The invention adopts a proprietary exhaus...

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 provides a twin tower tandem exhaust gas purifying processing combination device which adopts a biomembrane packing tower system utilizing catalytic oxidant cyclically spraying liquid in the front and a biomembrane packing tower system utilizing pH buffering agent cyclically spraying liquid in the rear, which can carry out purifying processing to simultaneously remove the SQ2 and the NOx in the exhaust gas and to obtain by-products, namely, the utilizable sulphuric acid and nitrating acid products. The invention is characterized in that desulphuricants and denitrifier complex bacteria with the performance of simultaneously removing SQ2 and NOx in the exhaust gas under the conditions of liquid-phase catalyzed oxidation and pH acid environment can be obtained by screening and culturing and domesticating, and the composite bacteria biofilm to manufacture the biomembrane packing tower which is arranged in the tandem front end and is mainly used for removing SQ2; and the biomembrane packing tower which is mainly used for removing NOx in the rear is manufactured by adopting the denitrifier complex bacteria biofilm with the performance of removing NOx in the exhaust gas under the condition of pH neutral environment through screening and culturing and domesticating.

Description

Technical field [0001] The invention relates to a two-tower series catalytic-biofilm packing tower system for simultaneous removal of sulfur dioxide (SO 2 ) And nitrogen oxides (NOx) purification treatment and by-products can use sulfuric acid and nitric acid products. It belongs to the technical field of biological-chemical combined method waste gas purification. Background technique [0002] In recent years, with the rapid economic development and the rapid increase in coal consumption, my country’s SO 2 Emissions have reached more than 20 million tons, and the SO 2 The area that is mainly caused by acid rain pollution has accounted for about 40% of the country's land area, and the country's annual economic loss caused by this has reached hundreds of billions. SO 2 As a major issue of environmental pollution, the hazard has long attracted the attention of governments and environmental protection agencies around the world. In terms of flue gas desulfurization technology, many c...

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): B01D53/78B01D53/84B01D53/86B01D53/60
CPCY02A50/20
Inventor 孙珮石孙克勤王洁邓辅唐毕晓伊邹平
Owner NANJING JIANGDAO INST OF ENVIRONMENT RES CO LTD
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