Front semidry desulphurization system and desulphurization technology

Abstract

The invention discloses a front semidry desulphurization system which comprises a desulphurization system, a dust removing system and an exhaust system, wherein the desulphurization system is arranged at the front end of the dust removing system, and comprises a desulfurizing tower, a cyclone separator and a recycling material box; the inlet end of the desulfurizing tower is connected with a flue which is not dedusted; the outlet end of the desulfurizing tower is connected with the inlet end of the cyclone separator; a first outlet end of the cyclone separator is connected with the dust removing system which is then connected with the exhaust system; a second outlet end of the cyclone separator is connected with the inlet end of the recycling material box; the outlet end of the recycling material box is communicated with the desulfurizing tower; and the desulfurizing tower is provided with a jet apparatus used for spraying a desulfurizing agent into the desulfurizing tower. The desulfurizing tower is connected with the flue which is not dedusted, and flue gas is firstly desulfurized and then dedusted, so that the dust removal condition of the dust removing system can be improved; a stage of dust removing system is only needed to be arranged in the whole system, so that one-time construction cost is lowered; and the running cost of the semidry desulphurization system is greatly reduced.

Description

technical field [0001] The invention relates to an industrial waste gas desulfurization system, in particular to a pre-type semi-dry desulfurization system and a desulfurization process. Background technique [0002] Flue gas desulfurization (FGD for short) refers to the removal of sulfur oxides (SO 2 and SO 3 ). Semi-dry FGD technology refers to desulfurization of desulfurizer in dry state and regeneration in wet state (such as water washing activated carbon regeneration process), or desulfurization in wet state and treatment of desulfurization products in dry state (such as spray drying method) Gas desulfurization technology. In particular, the semi-dry method of desulfurization in a wet state and processing desulfurization products in a dry state has the advantages of fast reaction speed and high desulfurization efficiency of the wet desulfurization method, and the dry method has no sewage waste acid discharge and desulfurization products The advantage of being easy t...

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Problems solved by technology

It can be seen that the system is equipped with two-stage dust removal. In actual operation, the outlet of the first-stage electrostatic precipitator also needs to be equipped with a fan to blow the flue gas to the desulfurization tower, and the outlet of the second-stage bag filter is equipped with an induced draft system to blow the flue gas Blowing to the chimney will undoubtedly increase the initial investment in the construction of the system, and the system is lengthy and complicated, which also brings inconvenience to maintenance and overhaul

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