Grading oxidation and absorption type method for simultaneous desulphurization and denitration of sintering flue gas, and system

A technology of sintering flue gas and graded oxidation, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve problems such as high oxidant costs, no mature technical solutions for sintering flue gas, and large initial investment and operating costs. To achieve the effect of avoiding mutual influence

Inactive Publication Date: 2014-08-13
SOUTHEAST UNIV
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the denitrification technologies commonly used in coal-fired power plants are SCR or SNCR. Both methods need to be carried out at high operating temperatures (300-1000°C), and require new large-scale equipment, requiring a lot of initial investment and operation. Cost, the current problem brought about by oxidation and denitrification is the high cost of oxidant, for low temperature and low NO x Concentrated sintering flue gas currently has no mature technical solutions

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
  • Grading oxidation and absorption type method for simultaneous desulphurization and denitration of sintering flue gas, and system
  • Grading oxidation and absorption type method for simultaneous desulphurization and denitration of sintering flue gas, and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] A method for simultaneous desulfurization and denitrification of sintering flue gas by graded oxidation absorption, using an oxidant solution in the primary oxidation tower to spray and oxidize the sintering flue gas to oxidize nitrogen oxides and sulfur dioxide into nitrogen dioxide and sulfur trioxide; The absorbent solution is used in the secondary absorption tower to spray and absorb the sintering flue gas after spray oxidation, and absorb nitrogen dioxide and sulfur trioxide; finally, the sintering flue gas after spray oxidation and spray absorption is discharged .

[0023] The oxidant solution is an oxidant combination solution of sodium hypochlorite and potassium permanganate, wherein the potassium permanganate is 0.1 mol / L, and the sodium hypochlorite is 0.3 mol / L; the receiver solution is a limestone solution.

[0024] Such as figure 1 , figure 2 Sh...

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 grading oxidation and absorption type method for simultaneous desulphurization and denitration of sintering flue gas, and a system. An oxidant solution is adopted in a first grade oxidation tower to spray and oxidize the sintering flue gas so that nitrogen oxides are oxidized into nitric oxide and sulfur dioxide is oxidized into sulfur trioxide. An absorbent solution is adopted in a second grade absorption tower to spray and absorb the sintering flue gas being sprayed and oxidized so that the nitric oxide and the sulfur trioxide are absorbed. Finally, the sintering flue gas after spray oxidation and spray absorption is discharged. The method and the system largely reduce the using amount of the oxidant at the same time of achieving the objectives of simultaneous desulphurization and denitration, and are efficient and energy-saving.

Description

technical field [0001] The invention relates to a method and system for simultaneous desulfurization and denitrification of sintering flue gas of a graded oxidation absorption type, which belongs to flue gas purification technology. Background technique [0002] Nitrogen oxides (NO x ) and sulfur dioxide (SO 2 ) is one of the main causes of acid rain. In some areas south of the Yangtze River in my country, the frequency of acid rain is as high as 90%, and the area of ​​acid rain is still expanding. Acid rain not only severely corrupts buildings and public facilities, but also destroys large areas of forests and crops, causing economic losses of more than 15 billion yuan to the country every year; nitrogen oxides have a strong affinity with hemoglobin in the blood, and are easily inhaled into the lungs. In addition, nitrogen oxides are one of the important causes of photochemical pollution, so the problem of nitrogen oxide pollution has attracted the attention of the whole ...

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): B01D53/75B01D53/78B01D53/80B01D53/60
CPCY02A50/20
Inventor 钟文琪李颖居静
Owner SOUTHEAST UNIV
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