Full-dry dust removal system for converter primary flue gas high-efficiency energy-saving ultra-clean emission

Abstract

The invention relates to a full-dry dust removal system for converter primary flue gas high-efficiency energy-saving ultra-clean emission. A converter is connected with a heat pipe waste heat boiler through a vaporization cooling flue, and the vaporization cooling flue and the heat pipe waste heat boiler are connected with a waste heat water vapor system; the heat pipe waste heat boiler is sequentially connected with a multi-tube type anti-deflagration flame arrester, a pulse cloth bag dust remover, a fan, a switching station and a chimney through a flue gas pipeline, and the switching stationis further connected with a gas cabinet; and the heat pipe waste heat boiler, the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust remover are connected with a pneumaticash conveying system, the pneumatic ash conveying system is connected with a compressed nitrogen gas source, and the compressed nitrogen gas source is connected with the vaporization cooling flue, themulti-tube type anti-deflagration flame arrester and the pulse cloth bag dust collector. According to the full-dry dust removal system for converter primary flue gas high-efficiency energy-saving ultra-clean emission, flue gas cooling and the flue gas waste heat utilization are realized, the full-dry dust removal is adopted, the dust removal process requirement of a pulse cloth bag dust remover is met, the corrosion problem of a gas pipeline and equipment facilities is reduced, and the problem of smoke plumes of bled fuel gas is also avoided.

Description

technical field [0001] The invention relates to a dust removal system, in particular to an all-dry dust removal system for high-efficiency, energy-saving and ultra-clean discharge of primary flue gas of a converter. Background technique [0002] Converter steelmaking has become the main steelmaking process of iron and steel enterprises. During the blowing process, the converter produces gas containing mainly carbon monoxide, a small amount of carbon dioxide and other trace components, which also contains a large amount of iron oxide, metal iron particles, and other gases. Fine particles of solid dust will seriously pollute the atmosphere and workshop environment. Therefore, it is an urgent problem to be solved to improve the technical level of the converter dust removal system and effectively control and reduce the emission of air pollutants in steelmaking. [0003] China's iron and steel industry is in a period of structural adjustment, optimization and upgrading, and is f...

AI Technical Summary

Problems solved by technology

[0005] (1) The whole process of the traditional OG method dust removal system adopts wet treatment process. The disadvantages of this technology: ①The dust content of the treated gas is relatively high, which cannot reach ≤10mg / m 3 , to use this gas, it is also necessary to install an electrostatic precipitator at the rear for fine dust removal, and reduce its dust concentration to ≤10mg / m 3 ; ② There is secondary pollution in the system, and its sewage needs to be treated; ③ The resistance of the system is large, so the energy consumption is high and the floor area is large

[0014] 1. A large amount of heat generated during the smelting process is discharged with the flue gas, which pollutes the environment and causes a waste of resources;

[0015] 2. A large amount of water for evaporative cooling of flue gas is required;

[0016] 3. There is always a high risk of gas explosion in dry dust removal, and the electrostatic precipitator cannot avoid the problem of high-voltage flashover of the electric field, which causes the explosion venting problem of the electrostatic precipitator

During the actual production and operation of the converter primary flue gas dry electrostatic precipitator system, due to the frequent occurrence of explosion and smoke problems, the converter primary flue gas dry precipitator system often cannot ensure that the flue gas emission is stable and up to standard;

[0017] 4. There is a certain degree of corrosion in gas pipelines and equipment;

[0018] 5. The smoke plume problem of releasing smoke is more prominent;

[0019] 6. Higher requirements for operation and maintenance personnel

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