Detection method of dust removal ability of primary flue gas dust removal system of converter

Abstract

The invention discloses a method for detecting the dedusting ability of a primary flue gas dedusting system of a converter. The method firstly opens a chimney test port, inserts a monitoring gun through the test port, and keeps the opening of the filter cartridge of the monitoring gun away from the flue gas flow; The oxygen blowing time of the converter starts, after the N1 time, rotate the monitoring gun so that the opening of the filter cartridge of the monitoring gun faces the flue gas flow, and start dust sampling; after rotating the monitoring gun, after the N2 time, rotate the monitoring gun again, so that the filter The opening of the cylinder is away from the flue gas flow; finally, the dust removal system is switched to the flue gas recovery state and the monitoring gun is taken out after the N3 time has elapsed; the detection method of the present invention combines the actual rules of converter production to limit the sampling time of dust, so that sampling The interval covers the peak interval of the dust content in the converter flue gas and before and after, realizing the sampling of the primary flue gas of the converter to the greatest extent, and accurately obtaining the dust content data of the primary flue gas.

Description

technical field [0001] The invention relates to the field of converter dedusting, in particular to a method for detecting the dedusting capacity of a primary flue gas dedusting system of a converter. Background technique [0002] According to national regulations, the dust concentration standard of primary flue gas discharged into the ambient air from converters is 50 mg / standard cubic meter. The primary flue gas refers to the direct emission of CO concentration in the process of steelmaking and smelting because the CO concentration cannot reach the specified recovery standard. The primary flue gas is the flue gas that needs to be measured in environmental protection testing. [0003] In actual operation, due to various reasons in the operation of the converter, the concentration of CO in the flue gas varies greatly; at the same time, due to the severe toxicity of CO, in accordance with the principle of safety, the detection timing of the primary flue gas in the prior art is...

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Problems solved by technology

[0004] The first method cannot be quantified. When the second and third methods are implemented, all the flue gas in the whole process needs to be released before detection; since the detection includes the flue gas recovered by the gas cabinet during actual operation, according to the national According to regulations, this part of the flue gas is not within the detection range. Therefore, the current dust content of the flue gas measured by the converter environmental protection inspection is not an accurate dust content in the primary flue gas.

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