Desulfurization and denitrification equipment

Abstract

The invention discloses desulfurization and denitrification equipment, and belongs to the technical field of flue gas desulfurization and denitrification. The equipment comprises a reaction tower and a flue gas heat exchanger, and further comprises: a heat exchange flue which is circumferentially and spirally arranged on the outer wall of the reaction tower, wherein the head end and the tail end of the heat exchange flue are communicated with the flue gas heat exchanger, and the heat exchange flue is used for carrying out heat exchange on heat contained in flue gas before and after reaction; a spraying system fixedly arranged in the reaction tower and used for circularly inputting atomized slurry; and a blocking mechanism slidably arranged on the inner wall of the reaction tower, wherein one end of the blocking mechanism facing the flue gas input side is elastically sealed, and the blocking mechanism is matched with the spraying system to control the opening and closing of the elastic sealed end of the blocking mechanism to make the high-concentration sulfur-nitrate flue gas fully contacted and reacted with the atomized slurry. Original flue gas is cooled, cooled again through the heat exchange flue and then fed into the reaction tower, so that high-concentration sulfur nitrate flue gas is uniformly output towards the spraying system through the plugging mechanism, atomized slurry is fully contacted and reacted with the flue gas, the absorption effect is improved, and invalid work of the spraying system is reduced.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization and nitration, and in particular relates to a desulfurization and denitrification equipment. Background technique [0002] Desulfurization is to remove sulfur dioxide in flue gas, and denitrification is mainly to remove nitrogen oxides in flue gas. These two substances will form acid rain when they enter the atmosphere. Acid rain is very harmful to human beings. The country has always advocated environmental protection. Flue gas contains these substances, especially in thermal power plants. Desulfurization and denitrification equipment must be built at the same time when thermal power plants are built. [0003] At present, there are hundreds of flue gas desulfurization and nitration technologies in the world, but there are few processes that are suitable for different occasions and have practical value. The techniques are generally divided into three categories: dry method, semi-d...

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Problems solved by technology

[0004] The existing wet desulfurization and nitrification process needs to use the mixed reaction of atomized slurry and flue gas, but the flow rate of the slurry spray cannot be adjusted in real time according to the content of the flue gas entering the reaction tower, resulting in the continuous work of the spray pump and the generation of A large amount of ineffective work, and the temperature of the raw flue gas before entering the reaction tower is also high, which is not conducive to improving the reaction rate in the reaction tower

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