Method for detecting dust removal capacity of dust removal system for primary flue gas of converter

Abstract

The invention discloses a method for detecting dust removal capacity of a dust removal system for primary flue gas of a converter. The method comprises the steps as follows: firstly, a chimney test port is opened, a monitoring gun extends into the test port, and the opening of a filter cartridge of the monitoring gun is kept back to flue gas flow; then, the monitoring gun is rotated N1 time laterfrom the oxygen blowing moment of the converter, so that the opening of the filter cartridge of the monitoring gun faces the flue gas flow, and dust sampling is started; the monitoring gun is rotatedagain N2 time later from rotation of the monitoring gun, thus, the opening of the filter cartridge is back to the flue gas flow; finally, the dust removal system is switched into a flue gas recovery state and the monitoring gun is taken out N3 time later. The detection method is combined with the actual law of converter production, the dust sampling time is limited, so that a sampling interval covers a peak interval of the content of dust in the converter flue gas and front and back of the peak interval, sampling of the primary flue gas of the converter is realized to the greatest extent, andthe dust content data of the primary flue gas is obtained accurately.

Description

technical field [0001] The invention relates to the field of converter dust removal, in particular to a method for detecting the dust removal capability of a primary flue gas dust removal system of a converter. Background technique [0002] According to national regulations, the dust concentration standard of primary flue gas discharged from converter into ambient air is 50 mg / standard cubic meter, of which primary flue gas refers to the direct emission of CO concentration in the process of steelmaking and smelting because CO concentration cannot reach the specified recovery standard. To the flue gas in the air, 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 CO concentration 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 prim...

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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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