Blast furnace gas fine desulfurization device

Abstract

The invention relates to the technical field of blast furnace gas desulfurization, and discloses a blast furnace gas fine desulfurization device, which comprises a desulfurization tower, and also comprises a slurry preparation device and a storage dehydration device which are arranged at adjacent positions of the desulfurization tower. The desulfurization tower is communicated with the slurry preparation device, the desulfurization tower is abutted against the storage dehydration device. The slurry preparation device and the storage dehydration device are arranged on the two sides of the desulfurization tower respectively, lime powder and mixed liquid are stirred through the slurry preparation device and then fed into the desulfurization tower through the water pump after being stirred, and meanwhile, the flue gas pipe is communicated with the liquid outlet pipe of the water pump, so that flue gas can always react with standard-concentration lime milk, and the reaction is uniform and sufficient; during reaction, reaction products flow all the time, accumulation of the reaction products can be avoided, the flowing time can be prolonged through the U-shaped channel, so that the reaction time is prolonged, complete and sufficient reaction is ensured, meanwhile, the oxygen feeding pump is arranged in the center of the U-shaped pipeline for feeding oxygen, and the first reaction product calcium sulfite is converted into available gypsum through oxygen.

Description

technical field [0001] The invention relates to the technical field of blast furnace gas desulfurization, in particular to a blast furnace gas fine desulfurization device. Background technique [0002] Blast furnace gas is a by-product combustible gas in the process of blast furnace ironmaking, including various oxides, sulfides, dust, etc. The sulfide in blast furnace gas is mainly sulfur dioxide, and sulfur dioxide is one of the main pollutants in the atmosphere. It is the main gas that forms acid rain and is extremely harmful. Therefore, blast furnace gas needs to be desulfurized before it can be discharged into the atmosphere. [0003] Traditional coal gas combustion desulfurization requires a combination of multiple sets of desulfurization devices, the devices are scattered, the investment is large and the management cost is high, and there are serious safety hazards in the whole process of pipeline equipment corrosion. At present, the more mature wet desulfurization pr...

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Problems solved by technology

[0003]Traditional coal gas combustion desulfurization requires multiple sets of sulfur dioxide removal devices, scattered among the devices, large investment and high management costs, and there are serious corrosion problems in the whole pipeline equipment Potential safety hazards. At present, the relatively mature wet desulfurization process uses the pre-dehydrogen sulfide technology configuration, so that the hydrogen sulfide removal process is mature and reliable. The wet desulfurization reduces the occupied area, and the operation is simple and unattended.

[0004] The absorption tower is the core equipment and main reaction steel container in the wet desulfurization system, where the sulfur dioxide removal reaction in the gas is carried out, but in order to increase the gas The contact time with the reactants improves the desulfurization efficiency. This type of absorption tower has a large volume, and it also needs to cooperate with the flue gas system, limestone slurry preparation system, gypsum dehydration system, waste water delivery system, process water system, waste water treatment system, absorption tower Emergency systems, etc., still have the problems of high initial investment costs, high operating costs, and large footprints, and the reaction products of the desulfurization process are easy to accumulate, which is easy to cause blockage or corrosion

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