Macromolecular dry denitrifying agent, preparation method thereof, denitrifying technology and denitrifying equipment

Abstract

The invention discloses a macromolecular dry denitrifying agent. The agent is prepared from components of raw materials in parts by weight as follows: 40-50 parts of urea, 10-20 parts of melamine and / or cyanuric acid, 20-30 parts of organic activated carbon powder, 10-15 parts of magnesium oxide, 10-15 parts of sodium carbonate, 20-25 parts of bentonite, 10-20 parts of quicklime and 1.0-1.2 partsof a catalyst. Meanwhile, the invention also provides a preparation method of the macromolecular dry denitrifying agent as well as a denitrifying technology and denitrifying equipment using the macromolecular dry denitrifying agent. The denitrifying agent obtained with the technical scheme is simple to prepare and low in cost. The dry denitrifying technology and denitrifying equipment using the denitrifying agent can treat flue gas with wider temperature ranges, have high denitrifying efficiency, have no ammonia escape and other side effects and have good application prospects.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas denitrification, in particular to a polymer dry denitrification agent, a preparation method of the denitrification agent, a denitrification process and a denitrification equipment using the denitrification agent. Background technique [0002] With the development of modern industrial production in our country, air pollution is becoming more and more serious, leading to the frequent occurrence of smog weather, which is called the "invisible killer" of human health, seriously affecting people's life and health. Nitrogen oxide NO X Pollution is one of the main sources of smog. At present, NO X The most effective means of emission is to denitrify the flue gas. There are many types of flue gas denitrification technologies. According to whether water is added to the denitrification process and the dry and wet form of the denitrification products, flue gas denitrification is divided into wet flu...

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Problems solved by technology

Dry flue gas denitrification usually adopts selective catalytic reduction denitrification reaction or selective non-catalytic reduction denitrification reaction. The catalytic reduction denitration reaction technology is relatively mature and reliable, and it is widely used in the world, especially in developed countries. The catalysts can be divided into high temperature catalysts (345 ℃~590℃), medium temperature catalysts (260℃~380℃) and low temperature catalysts (80℃~300℃), the suitable reaction temperature of different catalysts is different, if the reaction temperature is low, the denitrification rate will decrease, if the reaction temperature is high, It will lead to degradation of catalyst activity. Generally, when the temperature range is 250-450°C, the denitrification rate can reach 70%-90%. However, this process needs to preheat the flue gas, and the catalyst is expensive and has a short service life. Easy to corrode and other problems; the non-catalytic reduction reaction temperature range is 870-1200 ° C, the denitrification rate is low, generally less than 50%, and the process needs to preheat the flue gas, and there are also disadvantages such as easy corrosion of equipment

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