SNCR (Selective Non-Catalytic Reduction) denitration wall jet apparatus

Abstract

The invention relates to an SNCR (Selective Non-Catalytic Reduction) denitration wall jet apparatus, which comprises a gun body assembly and a nozzle assembly, wherein the gun body assembly comprises a pipeline assembly and an input assembly; the pipeline assembly comprises an air pipe and a urea pipe sleeved on the air pipe; a urea water ring cavity is formed between the air pipe and the urea pipe; the input assembly comprises an air joint arranged at one end of the air pipe, a urea water joint communicated with the urea water ring cavity and a reversing head; the other ends of the air pipe and the urea pipe are connected with the reversing head; and the nozzle assembly comprises a spray head and a doping device connected with the spray head. The technical problem that control over the emission of nitrogen oxides in China is at a starting stage and an environmental protection requirement cannot be met easily is solved, and the SNCR denitration wall jet apparatus can run stably in a high-temperature (1,100 DEG C), high-corrosion and high-wear smoke gas environment for a long time, and is used for finally controlling and treating NOx in smoke gas.

Description

technical field [0001] The invention relates to a flue gas wet denitrification device for a power station boiler, in particular to an SNCR (selective non-catalytic reduction method) denitrification wall injector, which can be applied to a power station coal-fired boiler for NOx control treatment. Background technique [0002] When boilers burn pulverized coal for energy conversion, they will emit a large amount of pollutants to the environment. According to statistics, 67% of atmospheric NOx emissions come from coal combustion. The emission of nitrogen oxides (NOx) is a series of serious pollution problems such as acid rain and photochemical smog. Therefore, it is very necessary to carry out NOx control treatment for coal-fired boilers in power plants. SNCR denitrification technology began to be applied in Japan in the mid-1970s. In the late 1980s, EU countries also began to apply SNCR denitrification technology. The United States began to apply SNCR denitrification technolo...

AI Technical Summary

Problems solved by technology

In recent years, high-efficiency and large-capacity power generating units have grown rapidly, and most of them have adopted relatively advanced low-nitrogen combustion technology, which has led to a downward trend in the NOx emission level per unit of power generation; in addition, the transformation of low-nitrogen combustion technology and The construction and operation of flue gas denitrification devices in some newly-built power plants has also played a certain role in reducing NOx emission levels. great development potential

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