Denitration reactor

Abstract

The invention discloses a denitration reactor which comprises an ammonia injection grid, a static mixer and a flow equalizing turbulator. The ammonia injection grid and the static mixer are arranged in a flue gas inlet pipeline, the static mixer is arranged above the ammonia injection grid, the flow equalizing turbulator is arranged in the reactor main body, and the flow equalizing turbulator is arranged in the reactor main body. The flue gas inlet pipeline is communicated with the reactor main body, the reactor main body is provided with a catalyst layer, and the flow equalizing spoiler is arranged between the catalyst layer and a communication port of the flue gas inlet pipeline and the reactor main body; according to the invention, by arranging the flow equalizing spoiler, the flue gas with non-uniform temperature is divided into a plurality of strands before the flue gas enters the catalyst layer, and the flue gas is fully disturbed and exchanges heat in a staggered manner, so that the temperature and the speed of the flue gas are uniformly distributed.

Description

technical field [0001] The invention relates to the technical field of denitration, in particular to a denitration reactor. Background technique [0002] NO x Discharge into the atmosphere will cause serious air pollution, so flue gas denitrification has become one of the most important air pollution control technologies, and has become a necessary measure for industrial enterprises to meet environmental standards. Selective Catalytic Reduction Technology (SCR) is a denitrification technology in which the reducing agent (ammonia) and NOx in the flue gas generate harmless nitrogen and water under the action of a catalyst. SCR technology is widely used in flue gas denitrification in the coke oven industry due to its mature technology, low ammonia escape rate, high denitrification efficiency, and no secondary pollution. [0003] The flue gas enters the SCR denitrification reactor from the flue gas inlet, mixes with the hot air generated by the hot air pipe, the mixed gas flow...

AI Technical Summary

Problems solved by technology

In the existing denitrification reactor, the flue gas has uneven velocity and temperature when it enters the catalyst layer, which will cause many problems. First, the catalyst activity is highly dependent on temperature, so too low or too high The temperature will affect the reaction rate. Second, when the temperature is too low, SO 2 The oxidation product of SO 3 Compatible with H in flue gas 2 O and NH 3 The reaction produces sulfuric acid and ammonium bisulfate, which leads to catalyst deactivation and corrosion. Third, excessive flue gas velocity will lead to wear of the catalyst layer, thereby reducing the operating effect of the SCR denitrification reactor.

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