Denitration of non-selective catalytic reducing smoke

Abstract

A non-selective catalytic reduction process for denitrating fume without spraying reducer includes such steps as controlling the excessive air coefficient of burner in boiler to 0.75-0.85, spraying burn-off air in it, regulating said excessive air coefficient to 1.05-1.15, spraying fine coal powder in it to obtain CO, H2 and hydrocarbon gas used as reducer, non-selective catalytic reduction reaction between NSCR catalyst and NOx in fume in the catalytic reactor, burning the residual CO gas under the action of oxidizing catalyst, and recovering its energy in preheater.

Description

technical field [0001] The invention relates to a catalytic reduction process for realizing flue gas denitrification without injecting a reducing agent, and belongs to the technical field of manufacturing and using environmental protection equipment. Background technique [0002] Nitrogen oxides (NO x ) is one of the main pollutants in the atmosphere, and its hazards mainly include acid rain, photochemical smog and other ways to endanger human health and ecological balance. while coal-fired power plants are NO x one of the main sources of pollution. In order to set NO x Emissions are controlled within a low range, and more and more coal-fired power plants use ammonia (NH 3 ) as the reducing agent to realize the selective catalytic reduction (SCR) process of flue gas denitrification. SCR is a high-efficiency flue gas denitrification process, but the SCR process usually uses NH 3 As a reducing agent, in the presence of a catalyst, with NO in the flue gas x Catalytic red...

AI Technical Summary

Problems solved by technology

But when a increases, more heat will be taken out of the furnace by the flue gas from the horizontal flue of the boiler, resulting in an increase in exhaust heat loss and a decrease in the thermal efficiency of the boiler, and also leads to NO x Great increase in generation

Images