Method for reducing emission of SO2 in sintering and distributing process based on ammonia additive

An additive and SO2 technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of reducing urea usage, poor removal effect, large urea usage, etc., to achieve reduced usage and uniform distribution , Guarantee the effect of production quality

Pending Publication Date: 2021-09-28
ANYANG IRON & STEEL
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the large amount of urea used for iron ore sintering in the prior art, and the SO 2 to solve the problem of poor removal effect, and provide a method for reducing SO emission in the process of sintering cloth based on ammonia additives 2 method; the present invention sprays the urea solution in the specific material layer thickness during the sintering cloth process, and utilizes the NH produced by the decomposition of the urea solution in the dry preheating layer 3 with the SO adsorbed in the superhumid layer 2 A chemical reaction occurs to achieve better SO 2 Removal effect, but also effectively reduce the use of urea

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 reducing emission of SO2 in sintering and distributing process based on ammonia additive
  • Method for reducing emission of SO2 in sintering and distributing process based on ammonia additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] SO emission reduction in the process of sintering cloth based on ammonia additives in this embodiment 2 method, the process is:

[0025] (1) Preparation of urea solution: check the electric stirring device, steam facilities, infusion pump and various valves, add urea and water into the solution tank and mix thoroughly, and prepare a urea solution with a concentration of 40%.

[0026] (2) Spraying of urea solution: Taking the nine-roll fabric as an example, the feeding capacity of the sintering machine is 800t / h, and 18 nozzles are used to spray urea solution, and the 18 nozzles are divided into 6 groups, each with 3 nozzles Nozzle, the nozzle is perpendicular to the material surface, 200-300mm away from the material surface. The size of the main pipe in the solution pipeline is DN50, the size of the 6 branch pipes is DN25, the size of the 18 spray pipes is DN15, the model of the nozzle is 1 / 8HH-S316L-3.6WSQ, and the spray angle is 60°. And in the whole process, its ur...

Embodiment 2

[0031] SO emission reduction in the process of sintering cloth based on ammonia additives in this embodiment 2 The method is basically the same as embodiment 1, and its difference is that its process is:

[0032] (1) Preparation of urea solution: check the electric stirring device, steam facilities, infusion pump and various valves, add urea and water into the solution tank for thorough mixing, and prepare a urea solution with a concentration of 37.5%.

[0033] (2) Spraying of urea solution: Taking the nine-roll fabric as an example, the feeding capacity of the sintering machine is 800t / h, and 18 nozzles are used to spray urea solution, and the 18 nozzles are divided into 6 groups, each with 3 nozzles Nozzle, the nozzle is perpendicular to the material surface, 200-300mm away from the material surface. The size of the main pipe in the solution pipeline is DN50, the size of the 6 branch pipes is DN25, the size of the 18 spray pipes is DN15, the model of the nozzle is 1 / 8HH-S31...

Embodiment 3

[0038] SO emission reduction in the process of sintering cloth based on ammonia additives in this embodiment 2 The method is basically the same as embodiment 1, and its difference is that its process is:

[0039] (1) Preparation of urea solution: check the electric stirring device, steam facilities, infusion pump and various valves, add urea and water into the solution tank for thorough mixing, and prepare a urea solution with a concentration of 38%.

[0040](2) Spraying of urea solution: Taking the nine-roll fabric as an example, the feeding capacity of the sintering machine is 800t / h, and 18 nozzles are used to spray urea solution, and the 18 nozzles are divided into 6 groups, each with 3 nozzles Nozzle, the nozzle is perpendicular to the material surface, 200-300mm away from the material surface. The size of the main pipe in the solution pipeline is DN50, the size of the 6 branch pipes is DN25, the size of the 18 spray pipes is DN15, the model of the nozzle is 1 / 8HH-S316L-...

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 reducing emission of SO2 in a sintering and distributing process based on an ammonia additive, and belongs to the technical field of iron ore sintering. The method comprises the following steps of firstly, preparing a urea solution with the concentration ranging from 37.5 percent to 40 percent; and uniformly spraying the prepared urea solution onto a specific material layer, wherein the specific material layer is a material layer which is 80mm to 200mm away from a grid section in the vertical direction. The urea solution is sprayed in the specific material layer thickness in the sintering and distributing process, NH3 generated by decomposition of the urea solution in a drying and preheating layer and the SO2 adsorbed in an over-wet layer are subjected to a chemical reaction, so that a better SO2 removal effect is achieved, and meanwhile, the use amount of urea is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of iron ore sintering, more specifically, to a method for reducing SO emissions in the process of sintering cloth based on ammonia additives 2 Methods. Background technique [0002] In 2020, my country's crude steel production reached 1.053 billion tons, a year-on-year increase of 5.20%, and my country's crude steel production accounted for 56.50% of the world's total. With the rapid development of the iron and steel industry, the environmental pollution problems brought by iron and steel enterprises have become more and more prominent, which has had a serious impact on the quality of life of the people. The iron ore sintering process is an important link in the iron and steel production process, and it is also one of the main sources of pollution in the iron and steel industry. In recent years, although my country has made important progress in the realization of ultra-low emissions in iron and steel ente...

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
IPC IPC(8): C22B1/16B01D53/50B01D53/76
CPCC22B1/16B01D53/50B01D53/76
Inventor 龙红明周东锋春铁军关红兵雷杰龙防刘月建章裕东王毅璠
Owner ANYANG IRON & STEEL
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