Control of ammonia escape from SNCR flue gas denitrification of circulating fluidized bed boilers in coal-fired power plants

Abstract

The control of ammonia slip is a problem that must be faced by SNCR denitrification in CFB boiler applications. This article summarized the harm caused by ammonia slip to the environment and power plant equipment. And the causes of excessive ammonia slip were summarized also. It was proposed to reduce ammonia slip by increasing the SNCR full load adaptability, adding additives, controlling the NH3/NOx mol ratio, increasing the uniformity of the mixing of flue gas and reducing agent and optimizing the denitration control strategy. The basis for environmental protection, safety and economic operation of power plants was provided.