Decomposition and denitration system of fluidized bed type urea and its derivative and process thereof

Abstract

The invention provides a decomposition and denitration system of fluidized bed type urea and its derivative and a process thereof, and belongs to the technical field of smoke gas denitration. The system comprises a fluidized bed reactor, a first-grade cyclone separator, a second-grade cyclone separator, a smoke gas and reaction gas mixer, a multi-layered denitration reactor and an air preheater. A fluidized gas distributor, a fluidized plate, a catalyst bed layer, and a gas gear dust collector and an inner cyclone are arranged in the fluidized bed reactor. The invention further relates to a process for decomposition and denitration by using the system. The decomposition and denitration system applies the fluidized bed reactor to decompose the raw materials, and the decomposition rate is up to 95%. The raw materials in the invention are industrial emission; the fluidized bed reactor is used for decomposing urea and its derivative, and NH3 generated from triamine waste product and triamine secondary product so as to perform the denitration on the smoke gas; the smoke gas also provides the fluidized medium for the fluidized bed reactor; meanwhile, the recycle of the urea, the triamine waste product and the smoke gas is realized; the waste treatment and denitration cost are reduced, and the environment pollution is further reduced.

Description

technical field [0001] The invention belongs to the technical field of flue gas denitrification, and specifically relates to a fluidized bed type urea and its derivatives decomposition and denitrification system and process. Background technique [0002] With the improvement of national environmental protection indicators, the control of flue gas emission indicators of coal-fired power plant boilers is becoming more and more stringent, and the emission of flue gas pollutants from coal-fired power plants has received extensive attention from the international community. Boiler flue gas denitrification has been popularized all over the country, and the invention of selective catalytic reduction flue gas denitrification technology has made liquid ammonia, ammonia water and urea widely used as flue gas denitrification reducing agents. [0003] 1. Liquid ammonia denitrification technology [0004] Liquid ammonia denitrification is a selective catalytic reduction flue gas denitri...

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Problems solved by technology

[0013] In order to solve the existing safety risks in the production, storage and transportation of flue gas denitrification technology, the high consumption of raw materials and energy, and the complexity of equipment manufacturing, etc., and at the same time solve the waste materials (such as waste products) generated by the production of urea and triamine It is difficult to recycle triamine and triamine by-products), so that the waste generated in the production of urea and triamine can be fully utilized, reducing environmental pollution and reducing the operating cost of flue gas treatment

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