Oxidative absorption method for removing NOx and SO2 in flue gas simultaneously
An oxidation absorption, SO2 technology, applied in the field of oxidation absorption method, can solve the problems of environmental secondary pollution, equipment corrosion, low utilization rate, etc., and achieve the effects of low cost, strong oxidation and absorption capacity, and strong absorption capacity
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Embodiment 1
[0052] For a 35 t boiler, the flue gas volume is 35000 m 3 / h, flue gas temperature 120 ℃, NO in flue gas x and SO 2 Concentrations are 200 mg / m 3 and 1000 mg / m 3 , using a turbid mixture containing 0.1 mol / L sodium persulfate and 0.2 mol / L calcium peroxide uniformly mixed as an oxidation absorbent for simultaneous wet desulfurization and denitrification, fully contacting with the flue gas in the spray tower, the liquid gas The ratio is 10~20, and the reaction temperature is 50°C. The denitrification efficiency and desulfurization efficiency can be achieved by 80% and 100%, respectively, by testing the purified flue gas.
[0053] The industrial prices of sodium persulfate and 70% calcium peroxide are 6,500 yuan / t and 6,000 yuan / t, respectively. The cost of wet desulfurization and denitrification operation for one day is equivalent to the cost of 1 ton of fuel increased by about 40 yuan.
Embodiment 2
[0055] For a 35 t boiler, the flue gas volume is 35000 m 3 / h, flue gas temperature 120 ℃, NO in flue gas x and SO 2 Concentrations are 200 mg / m 3 and 1000 mg / m 3 , using a turbid mixture containing 0.1 mol / L ammonium persulfate and 0.2 mol / L calcium peroxide uniformly mixed as an oxidation absorbent for simultaneous wet desulfurization and denitrification, fully contacting with the flue gas in the spray tower, the liquid gas The ratio is 10~20, and the reaction temperature is 50°C. The denitrification efficiency and desulfurization efficiency can be achieved by 70% and 100%, respectively, by testing the purified flue gas.
[0056] The industrial prices of ammonium persulfate and 70% calcium peroxide are 4,500 yuan / t and 6,000 yuan / t, respectively. The cost of wet simultaneous desulfurization and denitrification operation for one day is equivalent to the cost of 1 ton of fuel increased by about 30 yuan.
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