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Converter fume cooling and dedusting method

A converter flue gas and flue gas technology, applied in the direction of manufacturing converters, etc., can solve the problems of high power consumption and high water consumption, and achieve the effect of saving power consumption and water consumption

Active Publication Date: 2007-12-26
CHINA JINGYE ENG TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for cooling and dust removal of converter flue gas, so as to solve the disadvantages of large power consumption and high water consumption in the existing method;

Method used

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  • Converter fume cooling and dedusting method

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Embodiment Construction

[0021] As shown in Fig. 1, 2, the inventive method comprises the following steps:

[0022] 1) Surface cooling, the high-temperature flue gas from the flue of the steelmaking converter is used for heat exchange and cooling through the heat exchanger 2, and the forced cold water circulation is used in the heat exchanger 2 to initially cool the flue gas to 900 ℃; then sent to the dust removal equipment 1, the dust removal equipment 1 is a cylindrical piece;

[0023] 2), evaporative cooling, cooling the flue gas with a temperature of about 900°C for dust removal, spraying cooling water droplets with the nozzle 3, mixing the sprayed water droplets with the hot flue gas, and evaporative cooling, so that the temperature of the flue gas is rapidly reduced to 70-80°C; the particle size of the sprayed cooling water droplets is within 100 microns, and the flow velocity of the flue gas is 4-5 m / s;

[0024] 3) Dust removal by spraying, the flue gas that has been evaporatively cooled is sp...

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Abstract

The converter fume cooling and dedusting method includes the following steps: cooling the fume from the flue of the steelmaking converter to below 900 deg.c by means of heat exchange; spraying cooling water to fume for evaporation cooling the fume further to 70-80 deg.c; and spraying water to the cooled fume to trap dust before exhausting dedusted fume through the fume outlet and draining the dusty water through the blow down. The method of the present invention can lower the temperature of fume fast and has low power consumption and water consumption.

Description

technical field [0001] The invention relates to a flue gas cooling and dust removal method, in particular to a converter flue gas cooling and dust removal method. Background technique [0002] The flue gas produced by the steelmaking converter during the smelting process has a high concentration of dust and carbon monoxide, but it can be recycled after cooling and dust removal, which not only protects the environment, but also avoids energy waste. At present, domestic steelmaking converter flue gas purification systems mostly use two-stage venturi tube dust collectors to cool down and remove dust from the flue gas. Among them, the cooling and dedusting principle of the first-stage venturi tube is: when the flue gas passes through the throat part of the venturi tube, the speed reaches about 60 m / s, which forms a large contrast with the cooling water sprayed into the throat part. speed, so that the cooling water is atomized; the atomized cooling water and the high-temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/38
Inventor 杨景玲俞非漉彭亦明朱晓华王海涛
Owner CHINA JINGYE ENG TECH CO LTD