High-efficiency denitrification equipment

Abstract

The invention discloses high-efficiency denitrification equipment. The high-efficiency denitrification equipment comprises a shell, wherein the shell is internally provided with a channel through which flue gas passes and an injector for injecting ammonia gas; a circle of annular retainer ring is arranged at the position, located above a nozzle, in the channel; one spoiler is arranged on the retainer ring; the spoiler comprises a fixed plate made of metal and a T-shaped plate; the fixed plate is one circle of annular baffle; the T-shaped plate comprises two metal plates which are vertical to each other; the end part of one metal plate is welded with the middle position of the other metal plate; the fixed plate is erected on the retainer ring; two ends of the T-shaped plate are fixed on the fixed plate; one layer of metal wire net plate is arranged above the retainer ring; and two ends of the metal wire net plate are connected with a power supply.

Description

technical field [0001] The invention relates to the technical field of denitrification, in particular to a catalyst-free denitrification device. Background technique [0002] In the general non-catalyzed denitrification scheme, the emission of nitrogen oxides (NOx) is reduced by adding denitrification agents such as liquid ammonia, ammonia gas or urea solution to the flue gas treatment process at 800-1100°C. It can reduce nitrogen oxides (NOx) to N2, but its denitrification efficiency is generally low, especially for large boilers. The main reason is that the denitrification efficiency is affected by the following factors: 1) The nitrogen oxides and the denitrification agent are not fully mixed in the combustion chamber; 2) The temperature distribution of the flue gas in the denitrification reaction area is uneven; therefore, many traditional SNCR methods can no longer Meets today's stringent requirements for NOx emissions from coal-fired boilers. [0003] Patent CN2011104...

AI Technical Summary

Problems solved by technology

The main reason is that the denitrification efficiency is affected by the following factors: 1) The nitrogen oxides and the denitrification agent are not fully mixed in the combustion chamber; 2) The temperature distribution of the flue gas in the denitrification reaction area is uneven; therefore, many traditional SNCR methods can no longer Meets today's stringent NOx emissions requirements for coal-fired boilers

[0003] Patent CN201110413816.3 discloses a denitrification equipment. The method of mixing nitrogen oxides and denitrification agents in this denitrification equipment is to use a V-shaped splitter to split the flow, and then a cyclone separator to achieve mixing. However, in this scheme, the V-shaped splitter is in the When splitting, the gas split into the cyclone separators on both sides may be uneven. For example, the ratio of nitrogen oxides and denitration agents in the left cyclone separator of the V-shaped splitter is 1:1, and the ratio of the right side may be 1. Compared to 1.05, this will still cause problems

In addition, the denitrification equipment with this structure still does not solve the problem of uneven temperature distribution of the flue gas in the denitrification reaction area

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