Dust removing system and processing method of blast furnace raw gas
A blast furnace gas and dust removal system technology, applied in dust collectors, separation methods, chemical instruments and methods, etc., can solve problems such as waste of heat energy, high investment in dry dust removal, and environmental pollution by venting devices, reducing investment and improving power generation efficiency. Effect
Inactive Publication Date: 2010-03-31
SHANGHAI MEISHAN IRON & STEEL CO LTD
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[0007] The purpose of the present invention is to provide a large blast furnace raw gas dedusting system and treatment method, which mainly solves the technical problems of high investment in the existing dry dedusting, waste of heat energy by using a rapid cooling device, and polluting the environment by using a diffuser
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[0024] Reference figure 1 : A large blast furnace raw gas dust removal system, including gravity dust collector 3, blast furnace gas all-dry bag dust collector 5 and large ash bin 9, blast furnace 1 is connected to gravity dust collector 3 and gravity dust collector 3 through blast furnace raw gas downpipe 2 The blast furnace gas dry bag filter 5 is connected through the semi-clean gas main 4, the blast furnace gas dry bag filter 5 and the large ash warehouse 9 are connected through the ash pipe 8, and the blast furnace gas dry bag filter is also connected Clean gas main 6. Large blast furnace gas treatment process The raw blast furnace gas produced in blast furnace 1 is transported to the gravity dust collector 3 through the blast furnace raw gas downpipe 2 to filter out large particles of dust, and the output semi-clean gas enters through the semi-clean gas main 4 The all-dry bag filter 5 for blast furnace gas enters the second row of 12-18 dust-removing cylinders 7 (6-9 cyli...
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The invention relates to a dust removing system and processing method of blast furnace raw gas to mainly solve the technical problems that the investment is high for removing the dust by adopting theexisting dry method, the heat energy is wasted by adopting a fast temperature reduction device, and the environment is polluted by adopting a heat dissipation device. The dust removing system of the invention comprises a gravity dust remover, a blast furnace gas full dry method cloth bag dust remover and a large ash bin, the blast furnace is connected with the gravity dust remover by a blast furnace raw gas declining pipe, the gravity dust remover is connected with the blast furnace gas full dry method cloth bag dust remover by a semi-purified gas total main pipe, the blast furnace gas full dry method cloth bag dust remover is connected with the large ash bin by an ash conveying pipe, the blast furnace gas full dry method cloth bag dust remover is also connected with a purified gas main pipe. The processing steps comprise: controlling the temperature of the furnace roof in the range from 120 DEG C to 300 DEG C; feeding into the gravity dust remover by the blast furnace raw gas declining pipe to filter large particle-shaped dusts; enabling the formed semi-purified gas to enter into 12-18 cloth bag dust removing cylinder groups arranged in the full dry method cloth bag dust remover;feeding the formed purified blast furnace gas into a next procedure TRT to generate electricity, after processing the semi-purified gas in the cylinder. The invention can improve the sensible heat ofthe blast furnace raw gas and increase the TRT waste heat electricity generation capability.
Description
Technical field [0001] The invention relates to a large blast furnace raw gas dust removal system and a processing method, in particular to a large blast furnace raw gas all-dry bag dust removal system and a processing method. The invention improves the sensible heat of the blast furnace raw gas and increases the TRT waste heat power generation capacity. Background technique [0002] In the ironmaking production process, each ton of pig iron can produce about 1400-1600m 3 The blast furnace gas is an important secondary energy source. Due to the high dust content of blast furnace raw gas, it cannot be used directly, and the dust content must be reduced to less than 10mg / m3. Therefore, the raw blast furnace gas must be purified. [0003] The blast furnace gas dust removal process has gone through the development stages of the "Venturi" wet method, the combination of dry bag and wet method, and the "Bischoff" wet method. Compared with wet dust removal, dry dust removal can not only ma...
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IPC IPC(8): C21B7/22B01D46/02
CPCY02A50/2351
Inventor 胡建农王自龙金自成林燕嵇金龙
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD