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Dual-mode blowback deashing device for blast furnace dry dedusting cloth bag

A technology of dry dust removal and dust removal device, which is applied in the direction of dust collector and process efficiency improvement, etc. It can solve the problems of high maintenance cost, high pressure difference of bag, affecting system production, etc., and achieve the effect of energy saving and long life of bag

Inactive Publication Date: 2021-04-09
广西钢铁集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing blast furnace gas dry method external filter bag dust removal process mostly adopts the process of nitrogen pulse back blowing or clean gas back blowing, and there are the following technical deficiencies: Nitrogen pulse back blowing process: system production During the period, periodic nitrogen blowback cleaning is used, which consumes a lot of energy; nitrogen pulse blowback cleaning is arranged according to the matrix arrangement of cloth bags, and a box assembly 100 is equipped with a nitrogen gas storage tank, multiple pulse valves, row blowing exhaust Pipe and row pipe nozzles, due to the different blowing intensity of each nozzle during actual cleaning, resulting in unsatisfactory bag cleaning effect and high follow-up maintenance costs; clean gas back-blowing cleaning process is adopted: the initial stage of blast furnace recovery or blast furnace furnace In case of unfavorable conditions, the gas pressure on the top of the furnace (dry system) is low, and the bag cannot be effectively blown back to clean the dust, and the pressure difference of the bag is high, which affects the production of the system

Method used

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  • Dual-mode blowback deashing device for blast furnace dry dedusting cloth bag

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Experimental program
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Embodiment 1

[0025] refer to figure 1 , which is the first embodiment of the present invention, this embodiment provides a dual-mode back-blowing soot cleaning device for dry dust removal bag for blast furnace, the dual-mode back-blowing soot cleaning device for dry dust removal bag for blast furnace includes a box assembly 100, a clean gas Ash cleaning assembly 200 and nitrogen blowback assembly 300, wherein the box assembly 100 includes a dust removal bag 101 placed in the box assembly 100, and a clean gas cleaning assembly 200 connected to the box assembly 100;

[0026] The nitrogen blowback assembly 300 is connected to the box assembly 100 and switched to use with the clean gas cleaning assembly 200 .

[0027] Based on the above, blast furnace dry dedusting is an energy-saving and environmentally friendly dedusting process. After dry dedusting, the blast furnace gas has a low dust content and can greatly increase the power generation capacity of the residual pressure of the gas. The en...

Embodiment 2

[0030] refer to figure 1 , is the second embodiment of the present invention, which is different from the first embodiment in that: the clean gas cleaning assembly 200 includes a raw gas branch pipe 201 connected to the dust bag 101, and the raw gas branch pipe 201 is provided with a first gas butterfly valve 201a and the first gas blind valve 201b, the first gas butterfly valve 201a is used for the switch control of the low-pressure pipeline medium, and rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjustment, the first gas blind valve The plate valve 201b is an electric blind plate valve, which is a gate valve for electrically cutting off the gas medium.

[0031] The clean gas cleaning assembly 200 also includes a clean gas branch pipe 202 and a gas pressure relief pipe 203 communicating with the upper part of the box assembly 100 , and the clean gas branch pipe 202 communicates with a high-pressure clean gas main pipe ...

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Abstract

The invention discloses a dual-mode blowback deashing device for a blast furnace dry dedusting cloth bag. The device comprises a box body assembly, a clean gas deashing assembly and a nitrogen blowback assembly, wherein the box body assembly comprises a dedusting cloth bag arranged in the box body assembly and the clean gas deashing assembly connected with the box body assembly; and the nitrogen blowback assembly is connected with the box body assembly and is switched with the clean gas deashing assembly for use. According to the dual-mode blowback deashing device for the blast furnace dry dedusting cloth bag, when the clean gas pressure of a dry dedusting system is larger than or equal to 100 kPa in the blast furnace production period, a clean gas blowback deashing process is adopted, system pressure gas is used for deashing, the deashing strength of all cloth bags in the box body is consistent, the service life of the cloth bags is long, deashing gas is completely recycled, and energy can be saved; and in the special production period of a blast furnace, the clean gas pressure of the dry dedusting system is less than 100kPa, and external nitrogen is adopted for blowback dedusting, so that the pressure difference of the cloth bag is effectively controlled within a reasonable range, and the normal production of the system is kept.

Description

technical field [0001] The invention relates to the field of metallurgical blast furnace gas dry method bag dust removal technology, in particular to a blast furnace dry method dust removal cloth bag dual-mode reverse blowing dust cleaning device. Background technique [0002] The existing blast furnace gas dry method external filter bag dust removal process mostly adopts the process of nitrogen pulse back blowing or clean gas back blowing, and there are the following technical deficiencies: Nitrogen pulse back blowing process: system production During the period, periodic nitrogen blowback cleaning is used, which consumes a lot of energy; nitrogen pulse blowback cleaning is arranged according to the matrix arrangement of cloth bags, and a box assembly 100 is equipped with a nitrogen gas storage tank, multiple pulse valves, row blowing exhaust Pipe and row pipe nozzles, due to the different blowing intensity of each nozzle during actual cleaning, resulting in unsatisfactory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/22
CPCC21B7/22Y02P10/20
Inventor 赵泽文莫朝兴吴建霖靳高峰梁明聪覃志强银雪斌何利卢伟华杨岳裴琼强陈裕华
Owner 广西钢铁集团有限公司
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