Limestone-gypsum wet flue gas desulfurization device
A technology of wet flue gas desulfurization and limestone, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of low solubility of limestone, achieve faster dissolution rate, good economic and environmental benefits, and reduce energy consumption Effect
Inactive Publication Date: 2015-07-08
HUAZHONG UNIV OF SCI & TECH
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[0003] The invention provides a limestone-gypsum wet flue gas desulfurization device, which solves the problem of low solubility of limestone existing in existing flue gas desulfurization devices, and is used for oxygen-enriched combustion
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[0019] Such as figure 1 As shown, the embodiment of the present invention includes an induced draft fan 1, a flue gas heat exchanger 2, an absorption tower 3, a slurry circulation pump 4, an oxidation tank 5, an oxidation fan 6, a limestone slurry tank 7, a limestone slurry pump 8, and limestone powder Bin 9, gypsum discharge pump 10, gypsum cyclone 11, belt dehydrator 12, filtrate water tank 13, filtrate water pump 14;
[0020] The induced draft fan 1 introduces the tail flue gas discharged from the oxygen-enriched combustion boiler into the high-temperature air inlet 2-1 of the flue gas heat exchanger 2, and then discharges it into the absorption tower from the low-temperature gas outlet 2-2 of the flue gas heat exchanger 2 3, the air inlet 3-1 of the absorption tower 3 is provided with a slurry tank 3-2, a spray device 3-3 and a demister 3-4 in sequence from bottom to top, and the gas outlet 3-5 of the absorption tower 3 is discharged The flue gas is divided into two paths...
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The invention discloses a limestone-gypsum wet flue gas desulfurization device, belongs to a flue gas desulfurization device applicable to a power station boiler, an industrial boiler or a kiln, and aims at solving a problem of an existing flue gas desulfurization device which is low in limestone solubility. The flue gas desulfurization device comprises an induced draft fan, a flue gas heat exchanger, an absorption tower, a slurry circulating pump, an oxidation pond, an oxidation air blower, a limestone slurry tank, a limestone slurry pump, a limestone powder cabin, a gypsum discharging pump, a gypsum cyclone, a belt dehydrator, a filtrate water tank and a filtrate water pump. The wet flue gas desulfurization device disclosed by the invention can activate limestone slurry through high-concentration CO2 flue gas generated from oxygen-enriched combustion, so as to accelerate the limestone slurry dissolution rate, improve the solubility, improve the desulfurization efficiency, reduce the liquid-gas ratio and reduce the water dosage, so as to achieve effects of energy conservation and emission reduction; the wet flue gas desulfurization device is free from secondary pollution, and is excellent in economic and environmental benefits.
Description
technical field [0001] The invention belongs to a flue gas desulfurization device of a power station boiler, an industrial boiler or a kiln, and in particular relates to a limestone-gypsum wet flue gas desulfurization device for oxygen-enriched combustion. Background technique [0002] The use of fossil fuels is CO 2 , SO 2 and NO x The main source of gaseous pollutant emissions, such as gas, seriously threatens human health and environmental safety, and oxygen-enriched combustion technology can effectively solve environmental pollution caused by the use of fossil energy. Oxy-fuel combustion technology is the high concentration of O obtained from the air separation unit 2 Mixed with part of the recirculated flue gas to replace air as the combustion medium, and finally get a high concentration of CO 2 A clean combustion technology. Oxygen-rich combustion due to the absence of N 2 participation, NO x The emission is significantly reduced, the removal is relatively easy ...
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IPC IPC(8): B01D53/80B01D53/50B01D53/96B01D53/62
Inventor 陈汉平田路泞王贤华杨海平李斌陈振辉杨晴张世红邵敬爱
Owner HUAZHONG UNIV OF SCI & TECH