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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Embodiment 1
[0029] Embodiment 1, spray into the hydrogen peroxide (H 2 o 2 ), keep H 2 o 2 / NO molar ratio 2~3, oxidize NO in coal-fired flue gas to NO 2 , so that NO X The oxidation degree is increased to 60%, and then the urea aqueous solution in the absorption tower is used for simultaneous desulfurization and denitrification. The concentration of urea aqueous solution is kept at 10%-20% (mass percentage), and the liquid-gas ratio is 9-12L / m 3 , The temperature is controlled at 80-90°C, and the pH value is controlled at 6.5-7. Its desulfurization efficiency can reach more than 90%, and its denitrification efficiency can reach about 50%.
Embodiment 2
[0030] Embodiment 2 is basically the same as Embodiment 1, the difference is: make NO X The degree of oxidation is increased to 50%.
Embodiment 3
[0031] Embodiment 3 is basically the same as Embodiment 1, the difference is: make NO X The degree of oxidation is increased to 50%.
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