Device and method for removing dust from converter gas by dry method

A technology for dry dust removal and converter gas, applied in the direction of manufacturing converters, improving process efficiency, improving energy efficiency, etc., can solve problems such as electrostatic precipitator explosion, electrostatic precipitator blow up, affecting production, etc., to improve safety , the effect of avoiding damage

Inactive Publication Date: 2013-01-16
WISDRI ENG & RES INC LTD
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Problems solved by technology

[0005] The disadvantage of the existing converter gas dry dedusting system is: discharge phenomenon occurs in the electrostatic precipitator, and explosion occurs in the electrostatic precipitator during the transition period between gas and air or abn

Method used

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  • Device and method for removing dust from converter gas by dry method
  • Device and method for removing dust from converter gas by dry method
  • Device and method for removing dust from converter gas by dry method

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example

[0029] Example: Assume that the converter steelmaking cycle is 40min, of which 0-10min is the preparation stage before blowing, 11-32min is the blowing stage, of which 16-28min is the gas recovery stage, and 33-40min is the tapping stage, then the converter gas The working process of the dry dust removal device is as follows:

[0030] 1) 0-10min, the vaporization cooling flue is not fed with compressed air, the anion generator 8 is in the low pressure working mode, the compressed air is fed inside, and the electrostatic precipitator 9 is in the long vibration cycle;

[0031] 2) 11-15 minutes, a proper amount of compressed air is introduced into the vaporization cooling flue, the anion generator 8 is in the high-voltage working mode, and nitrogen gas is injected into it, and the electrostatic precipitator 9 is in the short vibration cycle;

[0032] 3) 16-28 minutes, the vaporization cooling flue is not fed with compressed air, the anion generator 8 is in the high-voltage working ...

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Abstract

The invention discloses a device and a method for removing dust from converter gas by a dry method. The device comprises a converter, a vaporization cooling stack, an evaporative cooler, a crude dust collection system, an electrostatic dust collector system, a fine dust collection system, a fan, a gas component analysis system, a switching valve and a hydraulic station which are connected through a pipeline; the switching valve and the hydraulic station are in three-way connection with a gas chamber and a gas diffusion ignition system; and the vaporization cooling stack is communicated with a compressed air spraying system. A gas ionization area and a dust charging depression area of the electrostatic dust collector are separated, so that the damage of gas explosion to the electrostatic dust collector is avoided substantially, and the safety of a technology for removing dust from the converter gas by the method is improved. An appropriate amount of compressed air is sprayed into the vaporization cooling stack to ensure that gas is combusted, so that the recycling amount of saturated steam is improved. When the gas is recycled, the spraying of the compressed air is stopped, so that more converter gas can be recycled; and therefore, the convert gas can be fully utilized.

Description

technical field [0001] The invention relates to a converter gas dry dust removal device and method. Background technique [0002] The converter produces converter gas during the steelmaking process, and its main components are CO, CO 2 , O 2 , N 2 and Ar, etc., and FeO, Fe carried by the gas 2 o 3 , CaO, SiO 2 and other dust, the total dust content is 80-150g / N m 3 , it must be dedusted before it can be used, blowing one ton of steel can recover 80-120Nm of converter gas containing 60% CO concentration 3 , is an important secondary energy source for iron and steel plants. Compared with other dust removal technologies, converter gas dry dust removal technology has obvious advantages in economy and environmental protection: first, the dust removal efficiency is high, and the dust mass concentration is reduced to 15mg / Nm 3 The second is that there is no sludge and sewage treatment system in the dry dust removal system, and the recovered dust can be directly used, saving...

Claims

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Application Information

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IPC IPC(8): C21C5/40
CPCY02P10/25
Inventor 盖东兴胡建亮周全黄永红叶理德
Owner WISDRI ENG & RES INC LTD
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