Urea pyrolysis-to-ammonia structure and method capable of reducing sulfur dioxide/sulfur trioxide conversion rate of SCR denitration system
A technology of sulfur dioxide and sulfur trioxide, applied in chemical instruments and methods, separation methods, inorganic chemistry, etc., can solve the problems of increased resistance of air preheaters, blocked catalysts, low load rate, etc., to reduce flue gas temperature, reduce Conversion rate, the effect of reducing the volume of production
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[0021] The present invention will be further described in detail below in conjunction with the drawings and embodiments.
[0022] See figure 1 , The embodiment of the present invention can reduce the conversion rate of sulfur dioxide / sulfur trioxide in the SCR denitration system. The structure for producing ammonia by urea pyrolysis includes a urea solution dissolving tank 1, a filter device 2, a urea solution supply pump 3, a metering distribution device 4, and an atomizing spray gun 5. , Pyrolysis chamber 6, SCR reactor, flue gas heat exchanger 11, dilution fan 14 and electric heater.
[0023] The urea solution dissolving tank 1, the filtering device 2, the urea solution supply pump 3, the metering distribution device 4, and the atomizing spray gun 5 are connected in sequence.
[0024] The atomizing spray gun 5 is installed in the pyrolysis chamber 6.
[0025] The gas outlet at the top of the pyrolysis chamber 6 communicates with the ammonia injection grid 7.
[0026] The SCR reacto...
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