소각 Plant에서 무촉매 환원 장치의 최적반응조건에 관한 연구

A Study on the Optimum Reaction Condition of Selective Non-Catalytic Reduction at Incineration Plant

A study was conducted for possibility of optimum application of SNCR to the municipal solid waste incinerator in Taejon city. The major test influencing factors are temperature, kinds of reducing agents. NSR (normalized stoichiometric ratio) and injection point of reducing agents. The result of this study was followed. The maximum efficiency is 80% at the condition. urea injection. upper stage injection. NSR = 2, and at 950℃. but the operation condition is not stable. so we need another optimum operation condition. Optimum NSR for ammonia is 1.2 and for urea is 1.5. Optimum temperature for two reducing agents is 950℃. Upper stage is better then middle stage for injection point of reducing agents. The most optimum operation condition of SNCR for municipal solid waste incinerator was followed. Reducing efficiency can be reached to 65%. when we use ammonia as a reducing agent at upper stage injection. NSR is 1.2 and operating temperature is 950℃. But reducing efficiency can be upgraded to 75%. at the same condition. beside urea as a rediucing agent and NSR is 1.5. If we can control the operation condition of SNCR with urea as a reducing agent. we can control the emission concentration of nitrogen oxides belows 32ppm.