SO2 and NOx collaborative emission reduction method in sintering process

A technology for sintering process and preparation process, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of high cost of flue gas treatment and poor emission reduction effect, and achieve improved emission reduction efficiency and emission reduction efficiency. High and economical effect

Pending Publication Date: 2021-03-16
ANHUI UNIVERSITY OF TECHNOLOGY +1
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at adding ammonia inhibitors in the sintering material in the prior art, which will lead to SO in the sintering process 2 , NO X and dioxin and other pollutants have poor online emission reduction effects, and the cost of flue gas treatment is high; provide a sintering process SO 2 , NOx synergistic emission reduction method, by adding multi-layer composite pellets to the sintering process, wherein the multi-layer composite pellets are wrapped with ammonia inhibitors, which can effectively slow down the NH generated by the pellets at high sintering temperature 3 Release speed, so that it can fully react with the pollutants generated by sintering, so as to achieve the purpose of synergistic emission reduction

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
  • SO2 and NOx collaborative emission reduction method in sintering process
  • SO2 and NOx collaborative emission reduction method in sintering process
  • SO2 and NOx collaborative emission reduction method in sintering process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, a method for synergistic emission reduction of SO2 and NOx in the sintering process of this embodiment, in the preparation process of sintering raw materials, multi-layer composite pellets are added, and the multi-layer composite pellets include inner layer pellets 100 and are arranged in the inner layer The outer coating layer 200 of the pellet 100; the ammonia inhibitor and the inner layer pelletizing material are added during the preparation of the inner pellet 100, and the ammonia inhibitor can release ammonia gas when it is decomposed by heat, and the ammonia inhibitor The N element content accounts for 0.02-0.15% of the mass of the inner layer pellets, in this embodiment it is 0.047%, and the mass ratio converted into urea is 0.1%; Covering layer 200; the particle size of the outer pelletizing material reaches -0.149mm particle size mass percentage content ≥ 95%; the inner layer pelletizing material particle size reaches -0.074mm particl...

Embodiment 2

[0069] The preparation method and sintering emission reduction method of the pellets in this embodiment are basically the same as in Embodiment 1, except that the N element content of the ammonia inhibitor in this embodiment accounts for 0.038% of the mass of the inner pellet 100, The mass ratio converted to urea is 0.08%, the detection of SO 2 , NO X and the concentration of dioxins are recorded in Table 4, and the desulfurization and denitrification rate and the emission reduction efficiency of dioxins are calculated.

Embodiment 3

[0071] The preparation method and sintering emission reduction method of the pellets in this embodiment are basically the same as in Embodiment 1, except that the N element content of the ammonia inhibitor in this embodiment accounts for 0.071% of the mass of the inner pellet 100, The mass ratio converted to urea is 0.15%, the detection of SO 2 , NO X and the concentration of dioxins are recorded in Table 4, and the desulfurization and denitrification rate and the emission reduction efficiency of dioxins are calculated.

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses an SO2 and NOx collaborative emission reduction method in a sintering process, and belongs to the technical field of pollutant emission reduction in the sintering process. In the preparation process of a sintering raw material, multilayer composite pellets are added, and each multilayer composite pellet comprises an inner-layer pellet body and a wrapping layer arranged outside the inner-layer pellet body; an ammonia inhibitor and an inner-layer pelletizing material are added in the preparation process of the inner-layer pellet bodies, the ammonia inhibitor can release ammonia gas after being heated and decomposed, and the content of an N element in the ammonia inhibitor accounts for 0.02%-0.15% of the mass of the inner-layer pellet bodies; and then the inner-layer pellet bodies are wrapped with the wrapping layers by using the outer-layer pelletizing material. According to the SO2 and NOx collaborative emission reduction method, the emission reduction efficiencyof SO2, NOx and dioxin can be effectively improved by adding the multi-layer composite pellets in the sintering process.

Description

technical field [0001] The invention relates to the technical field of pollutant emission reduction in the sintering process, and more specifically, relates to a method for synergistic emission reduction of SO2 and NOx in the sintering process. Background technique [0002] With the increasingly serious environmental problems and the gradual enhancement of people's awareness of environmental protection, the iron and steel industry, as a major source of pollutant emissions, has received more and more attention from the national environmental protection department. In 2019, my country's Ministry of Ecology and Environment and other five ministries and commissions jointly issued the "Opinions on Promoting the Implementation of Ultra-Low Emissions in the Iron and Steel Industry", requiring iron and steel enterprises across the country to significantly reduce pollutant emission levels, and set the emission standards for sintering / pelletizing process pollutants as particulate matte...

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): C22B1/16B01D53/56B01D53/76
CPCC22B1/16B01D53/76B01D53/56B01D2251/2062
Inventor 王毅璠杨涛杨美洲龙红明钱立新罗云飞刘爽孟庆民余正伟春铁军雷杰王宏涛丁成义
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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