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

Method for purifying flue gas through activating persulfate by ozone, and apparatus thereof

A technology for activating persulfate and flue gas purification, which is applied to chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of initial investment and operation cost increase, and achieve simple and reliable equipment, no secondary pollution, The effect of broad application prospects

Active Publication Date: 2014-09-17
JIANGSU UNIV
View PDF9 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If separate flue gas mercury removal, VOCs removal and H removal are added at the end of the existing desulfurization and denitrification system 2 The S system will inevitably cause a further sharp increase in the initial investment and operating costs of the entire system, and it will be difficult to obtain large-scale commercial applications in developing countries.

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 purifying flue gas through activating persulfate by ozone, and apparatus thereof
  • Method for purifying flue gas through activating persulfate by ozone, and apparatus thereof
  • Method for purifying flue gas through activating persulfate by ozone, and apparatus thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1. SO in flue gas 2 ﹑NO x ﹑ H 2 S﹑Hg 0 and VOCs concentrations are 2000ppm, 400ppm, 200ppm, 50ug / m 3 and 100mg / m 3 , the flue gas temperature is 25°C, the molar concentration of ammonium persulfate is 1.0mol / L, the ozone injection concentration is 100ppm, and the liquid-gas ratio is 5L / m 3 , The ozone injection distance is 50cm. SO in flue gas 2 ﹑NO x ﹑ H 2 S﹑Hg 0The simultaneous removal efficiencies of VOCs and VOCs were 100%, 60.9%, 100%, 78.8% and 38.2%, respectively.

Embodiment 2

[0052] Example 2. SO in flue gas 2 ﹑NO x ﹑Hg 0 and VOCs concentrations are 2000ppm, 400ppm, 200ppm, 50ug / m 3 and 100mg / m 3 , the flue gas temperature is 25°C, the molar concentration of potassium persulfate is 1.0mol / L, the ozone injection concentration is 100ppm, and the liquid-gas ratio is 10L / m 3 , The ozone injection distance is 50cm. SO in flue gas 2 ﹑NO x ﹑ H 2 S﹑Hg 0 The simultaneous removal efficiencies of VOCs and VOCs were 100%, 68.9%, 100%, 85.7% and 48.6%, respectively.

Embodiment 3

[0053] Example 3. SO in flue gas 2 ﹑NO x ﹑ H 2 S﹑Hg 0 and VOCs concentrations are 2000ppm, 400ppm, 200ppm, 50ug / m 3 and 50mg / m 3 , the flue gas temperature is 35°C, the molar concentration of sodium persulfate is 1.5mol / L, the ozone injection concentration is 300ppm, and the liquid-gas ratio is 25L / m 3 , The ozone injection distance is 100cm. SO in flue gas 2 ﹑NO x ﹑ H 2 S﹑Hg 0 The simultaneous removal efficiencies of VOCs and VOCs were 100%, 86.9%, 100%, 94.6% and 68.9%, respectively.

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 purifying flue gas through activating persulfate by ozone, and an apparatus thereof. Ozone in the flue gas contacts with persulfate in a solution in a bubbling-spray two stage reactor to generate sulfate radicals and hydroxy groups having strong oxidizability in order to oxidize and remove SO2, NOx, mercury, H2S and VOCs in the flue gas; and a reaction product solution enters a mercury separation tower to remove mercury, a mercury removed sulfuric acid and nitric acid solution enters an ammonia feeding tower, an ammonium sulfate and ammonium nitrate solution generated through the above reaction enters a product crystallization tower, and a flue gas waste heat utilizing device is used to evaporate and crystal recyclable agricultural fertilizers ammonium sulfate and ammonium nitrate. In the invention, ozone is adopted to induce persulfate to generate the sulfate radicals and hydroxy groups having extremely strong oxidizability, and the oxidbillities of the sulfate radicals and the hydroxy groups are second to that of fluorine, and are far higher than that of single ozone or persulfate, so the five pollutants can be efficiently simultaneously removed.

Description

technical field [0001] The invention relates to the control of flue gas emission pollutants in the combustion process, in particular to an ozone-activated persulfate flue gas purification method and device. Background technique [0002] SO produced by combustion 2 ﹑NO x ﹑Hg﹑H 2 S and VOCs can cause serious hazards such as acid rain, photochemical smog, carcinogenicity, and teratogenicity. Therefore, the development of effective flue gas desulfurization, denitrification, mercury removal, VOCs and H removal 2 Method S is one of the important tasks of environmental protection scientists and technicians in various countries. [0003] In recent years, although people have developed a large number of flue gas desulfurization, denitrification, mercury, VOCs and H 2 S technology, but due to the limitations of human cognition process and the gradual development of science and technology, the existing various desulfurization, denitrification, mercury, VOCs and H 2 At the beginni...

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): B01D53/78B01D53/60B01D53/64B01D53/52B01D53/44
CPCY02A50/20
Inventor 刘杨先王燕张军吴东波
Owner JIANGSU UNIV
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