Full-load precise ammonia spraying system with functions of online speed field leveling and concentration field measuring
A technology of concentration measurement and concentration field, applied in the field of environmental treatment, to achieve the effect of improving denitrification efficiency, reducing ammonia injection volume and ammonia escape rate
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[0028] Example 1: Taking the SCR denitrification system of a 660MW supercritical unit in a power plant in Jiangsu as an example, there are currently problems with SCR: (1) NOx flow field at the outlet of SCR: There are many points of serious uneven distribution of NOx in both north-south and east-west directions ( The deviation exceeds 50%); (2) In some working conditions, there are multiple points of ammonia escape exceeding 3ppm; (3) The air preheater has been severely blocked many times, and it is forced to implement online water flushing of the air preheater during operation; (4) After low-level transformation, the above-mentioned problems are more prominent.
[0029] Since the SCR denitrification system of the power plant is divided into side A and side B, the configurations on both sides are exactly the same. Taking side A as an example, according to the content of the present invention, it is modified and installed with a full-load precision ammonia injection system bas...
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