Converter flue gas sample gas dry pretreatment method based on thermal-state sampling

Abstract

The invention discloses a converter flue gas sample gas dry pretreatment method based on thermal-state sampling, which solves the problems of sampling head damage, blockage and the like in the existing sampling process, and adopts the technical scheme that high-temperature converter flue gas is led out from a converter evaporation cooling flue through a flue gas sampling port and enters a sample gas pretreatment unit to be subjected to pretreatment such as cooling and purification; the high-temperature converter flue gas is fed into a mass spectrometer or an infrared analyzer for flue gas analysis for flue gas composition analysis, and the high-temperature converter flue gas is in reverse direct contact with the solid particle medium packed bed in the sample gas pretreatment unit for heat exchange, and is filtered and intercepted by a solid particle medium layer of the solid particle medium packed bed to obtain the high-temperature converter flue gas. And most smoke dust particles carried by the high-temperature converter smoke are captured. The method provided by the invention has the advantages of maintenance-free system, compact structure and high cooling efficiency, and can realize continuous and stable operation of the sampling process.

Description

technical field [0001] The invention belongs to the fields of flue gas analysis and detection and metallurgical energy environmental protection, and in particular relates to a method for dry pretreatment of converter flue gas samples based on hot state sampling. Background technique [0002] The application of converter gas analysis and dynamic control technology can improve the target rate of converter smelting, reduce smelting costs, improve the quality of molten steel, improve the recovery rate of converter gas, reduce the fluctuation of temperature and composition during tapping, and increase the alloy yield, etc. with broadly application foreground. [0003] The most important thing in the converter steelmaking control technology is the accurate control of the temperature and composition of the smelting process and blowing end point. With the development of modern converter steelmaking technology, the converter smelting process and end point control technology have rou...

AI Technical Summary

Problems solved by technology

[0006] (2) Due to errors in charge quality, composition, cooling capacity, etc. (especially steel scrap), a considerable number of heat "TSC" measurement results deviate from the target. resulting in molten steel [O] and slag Fe t O content is higher;

[0007] (3) The auxiliary gun equipment requires a lot of maintenance, and the commissioning rate is not high, about 85%.

The cost of the detection probe is relatively high, which increases the production cost;

[0008] (4) It is necessary to reduce the oxygen supply intensity when measuring "TSC", and it takes about 1 min to measure "TSO" after blowing, and it takes more time to wait for the chemical analysis results of the sample, which increases the converter smelting cycle

[0065] ①The service life of furnace gas sampling equipment

[0069] ③The detection accuracy is interfered by the cleaning gas

[0070] The ceramic filter material of the sampling head needs to be regularly purged with nitrogen, and most of the purged gas will stay in the sampling head, and the residual nitrogen will interfere with the accuracy of sample gas analysis during subsequent sampling

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