Coal-fired flue gas denitration and desulfurization method combined with urea wet method
A coal-fired flue gas, desulfurization and denitrification technology, applied in separation methods, chemical instruments and methods, air quality improvement, etc., can solve the problem of low oxidation degree, achieve the effects of no secondary pollution, convenient transportation, and good technical performance
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[0029] Example 1. Spray 50% hydrogen peroxide (H2) at the inlet of the spray tower flue gas. 2 O 2 ), keep H 2 O 2 / NO molar ratio 2~3, oxidize NO in coal flue gas to NO 2 To make NO X The degree of oxidation is increased to 60%, and the urea aqueous solution in the absorption tower is used for simultaneous desulfurization and denitration. The concentration of urea aqueous solution is maintained at 10%-20% (mass percentage), and the liquid-gas ratio is 9-12L / m 3 , The temperature is controlled at 80~90℃, and the pH value is controlled at 6.5~7. The desulfurization efficiency can reach more than 90%, and the denitration efficiency can reach about 50%.
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[0030] Embodiment 2 is basically the same as embodiment 1, the difference is: make NO X The degree of oxidation is increased to 50%.
Example Embodiment
[0031] Embodiment 3 is basically the same as embodiment 1, but the difference is: make NO X The degree of oxidation is increased to 50%.
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