Modular multi-stage flue gas desulfurization apparatus

Abstract

The invention relates to a modular multi-stage flue gas desulfurization apparatus, which comprises a desulfurization tower, wherein the upper portion of the desulfurization tower is coaxially providedwith an upper cover, the lower portion of the desulfurization tower is provided with a flue gas inlet, the upper cover is provided with a flue gas outlet, the inner wall of the desulfurization toweris vertically and fixedly provided with a plurality of position limiting rings at intervals, a dust removing assembly is embedded on the lowermost position limiting ring to ensure the dust-free entering of flue gas into desulfurization assemblies on the upper portion, the desulfurization assemblies are respectively embedded on the position limiting rings on the inner-upper portion of the desulfurization tower, and are used for flue gas desulfurization during the passing through of the flue gas, the structure of the desulfurization assembly comprises an annular outer frame with an upper openingand a lower opening, a snapping groove is radially arranged on the lower portion of the outer side of the outer frame, and is embedded on the upper portion of the position limiting ring, a support net is coaxially and fixedly arranged in the outer frame, and the upper portion of the support net is filled with a desulfurization material. According to the present invention, the modular multi-stageflue gas desulfurization apparatus has the detachably-arranged desulfurization module, the flue gas distribution plate is fixedly arranged on the desulfurization module, the flue gas forced distribution plate can fully contact the desulfurization material, the module replacement is simple and easy to perform, the investment cost and the operating cost are relatively low, no secondary pollution isgenerated, the treating is easy, the standard is easily achieved, and other advantages exist.

Description

technical field [0001] The invention belongs to the field of flue gas desulfurization equipment, in particular to a modular multi-stage flue gas desulfurization device. Background technique [0002] Definition of dry flue gas desulfurization: CaCO3 sprayed into the furnace is calcined at high temperature and decomposed into CaO, which reacts with SO2 in the flue gas to generate calcium sulfate; electron beam irradiation or activated carbon adsorption is used to convert SO2 into ammonium sulfate or sulfuric acid, collectively referred to as dry flue gas desulfurization. flue gas desulfurization technology. Its advantages are simple process, no sewage, acid treatment problems, low energy consumption, especially the high temperature of flue gas after purification, which is conducive to the diffusion of chimney exhaust, and will not produce "white smoke". The gas does not require secondary heating and is less corrosive. [0003] The commonly used materials for dry desulfurizat...

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Problems solved by technology

[0003] The commonly used materials for dry desulfurization are granules or small cylindrical materials. The materials are put into packaging and then transported and replaced. The existing replacement method is to take the materials out of the desulfurization tower and add new ones, usually after desulfurization heating. The finished material has a lot of dust, and the construction environment is poor when it is replaced, which needs to be improved urgently

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