A kind of desulfurization and denitrification equipment

Abstract

The invention discloses a desulfurization and denitrification equipment, which belongs to the technical field of flue gas desulfurization and nitrification, and includes a reaction tower, a flue gas heat exchanger, and a heat exchange flue, which are spirally arranged on the outer wall of the reaction tower in a circumferential direction. They are all connected with the flue gas heat exchanger for heat exchange of the heat contained in the flue gas before and after the reaction, and the spray system is fixedly arranged in the reaction tower for circulating the input atomized slurry, blocking The mechanism is slidingly arranged on the inner wall of the reaction tower, and is elastically sealed at the end facing the flue gas input side, and cooperates with the spray system to control the opening and closing of the elastic sealing end, so that the high-concentration sulfur-nitrate flue gas can fully contact and react with the atomized slurry . In the present invention, after the original flue gas is cooled down, it is sent to the inside of the reaction tower after being cooled again through the heat exchange flue, so that the high-concentration sulfur-nitrate flue gas is evenly output towards the spray system through the blocking mechanism, so that the atomized slurry is fully mixed with the spraying system. The contact reaction of flue gas improves the absorption effect and reduces the ineffective work of the spray system.

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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