建立逆向气液喷淋反应塔，利用焦化废水进行烧结烟气脱硫试验研究。研究烧结烟气SO2浓度、焦化废水pH值、温度等因素对脱硫效率的影响。当烧结烟气中SO2浓度为4000 mg/m3，温度控制在2 ℃，焦化废水pH值为9.0时，尾气中的SO2浓度降到118 mg/m3，脱硫效率达到97%。烧结烟气中SO2初始浓度增加可加快脱硫速率，增加脱硫量。升高焦化废水pH值、降低温度，有利于提高脱硫效率。
A spray tower was built, and experiment was carried out on desulfurization of sintering flue gas with coking wastewater. Factors as inlet SO2 concentration of sintering flue gas, pH values of coking wastewater and temperature were studied to find the impacts on desulfurization. The outlet SO2 concentration was 118 mg/m3, and desulphurization efficiency was 97% when the inlet SO2 concentration was 4000 mg/m3, temperature was 2 ℃, and pH values of coking wastewater was 9.0. The desulphurization rate and removed sulphur increased with the inlet SO2 concentration.Desulphurization efficiency can be improved with decrease of pH value of coking wastewater and increase of temperature.
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