Dry denitration ultrafine powder for cooperatively realizing ultralow emission of flue gas as well as preparation method and application thereof

Abstract

The invention discloses a dry denitration ultrafine powder for cooperatively realizing ultralow emission of flue gas as well as a preparation method and application thereof, relates to the field of denitration, and aims at solving the problems that an existing SCR denitration technology is high in cost and complex in construction, a catalyst is prone to poisoning and losing efficacy, the catalystis difficult to treat as a dangerous waste product, and an SNCR denitration technology is low in denitration rate and cannot realize ultra-low emission. The ultrafine powder is prepared by compoundingcalcium hydroxide, sodium bicarbonate, calcium-based granular white earth, micron amino reducing powder, and iron ores. The ultrafine powder is applied to flue gas denitration of power station boilers and biomass boilers of boilers. The micron amino reducing agent and calcium hydroxide are mixed and heated so as to carry out rapid decomposition and gasification to generate high activity ammonia gas, high activity ammonia gas and NOx carry out a super oxidation reaction under the synergistic effect of ammonia gas and hydroxyl free radicals generated by decomposition of solid crystallized oxygen in the denitration ultrafine powder; NOx is oxidized into CO2, H2O, and trace mineral salts in a non-preference mode; and the denitration rate is largely improved.

Description

technical field [0001] The invention relates to the field of denitrification, mainly relates to a superfine denitrification powder for dry-type ultra-low emission of flue gas from coal-fired boilers, kilns, power station boilers and biomass boilers, and in particular to a dry-type denitrification ultrafine powder for synergistically realizing ultra-low emission of flue gas And its manufacture method and application. Background technique [0002] Nitrogen oxides (NO X ) The pollution of the environment has become an increasingly serious global problem, and it is one of the main air pollutants. The acid rain and photochemical smog it generates will cause large areas of crops and forests to die. Acid rain will also corrode bridges and buildings and shorten their service life. Photochemical smog has obvious carcinogenic effects. great harm. One of the main sources of nitrogen oxides is the harmful components produced by coal combustion and released into the atmosphere, follow...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high construction cost, high operating cost after investment conversion, long construction period, complex construction, easy poisoning and failure of catalyst, and difficulty in handling as hazardous waste and extremely high treatment cost in SCR denitrification technology. Problems of low wet denitrification rate and inability to achieve ultra-low emissions

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