Ammonia desulfurization process and desulfurization device thereof

Abstract

The invention provides an ammonia desulfurization process and a desulfurization device. A desulfurizer takes water, ammonia gas and oxygen with the weight ratio being 6:1:0.01 as raw materials, and isconveyed to a desulfurization reaction area in a boiler flue through a power system; the temperature of the desulfurization reaction area is 35 to 150 DEG C; ammonium hydroxide and the oxygen make contact with sulfur dioxide through an atomization nozzle to produce chemical reaction so as to generate ammonium sulfate, and the weight ratio of the ammonium hydroxide and the oxygen to the sulfur dioxide is 1:(1.72 to 1.46); a control system is characterized in that the spray volume of the ammonium hydroxide and the oxygen is automatically controlled by a computer according to collected data; product collection is characterized by adopting a wet process for trapping ammonium sulfate or a dry type gravity method for collecting the ammonium sulfate; the desulfurization device comprises a flue,a liquid storage tank, an oxygen tank, a production collecting device, an online detector, an atomization spray head and the control system. According to the ammonia desulfurization process and the desulfurization device thereof, provided by the invention, desulfurization can be carried out in the boiler flue or a waste gas channel of equipment producing the sulfur dioxide, the desulfurization efficiency and the desulfurization rate are automatically controlled, the reaction speed is fast, a desulfurization effect is good, and the operation cost can be reduced.

Description

Technical field: [0001] The invention relates to a desulfurization technology, in particular to a process and a desulfurization device for performing ammonia desulfurization on boiler flue gas. Background technique: [0002] At present, a variety of desulfurization technologies and devices have been developed at home and abroad for desulfurization of boiler flue gas or other equipment exhaust gas, among which calcium desulfurization, magnesium desulfurization, ammonia desulfurization and so on are widely used. Among these methods, the wet method (calcium method or magnesium method) desulfurization technology uses limestone or magnesium oxide slurry as raw material to achieve the desulfurization effect through absorption, oxidation and demisting. The disadvantages are high operating costs and equipment corrosion. Serious problems such as waste water to be treated, and the collection and treatment of its products (calcium sulfate, magnesium sulfate) all need a lot of money. T...

AI Technical Summary

Problems solved by technology

The adoption of the desulfurization tower is a common method for traditional ammonia desulfurization, because the chemical reaction speed of traditional ammonia desulfurization technology is low, and additional oxidation treatment is required for product recovery

In this way, the cost of traditional ammonia desulfurization is increased, especially the desulfurization tower takes up a lot of space

The traditional ammonia desulfurization method cannot be used for waste gas treatment with small space

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