新型射流曝气技术对脱硫浆液的氧化特性研究

RESEARCH ON OXIDATION CHARACTERISTIC OF DESULFURIZATION SLURRY BY A NEW JET AERATION TECHNOLOGY

通过比较射流曝气与鼓风曝气的氧化效果及能耗,提出了臭氧协同空气射流曝气的一种新型湿法脱硫浆液强制氧化技术,并探究了其在氧化脱硫浆液方面的工业应用前景,讨论了O_3浓度与传输距离、进气量、浆液循环量、温度、pH和液面高度对脱硫浆液氧化特性的影响。实验结果表明:臭氧协同空气射流曝气、空气射流曝气、鼓风曝气对脱硫浆液的氧化率(η)和能耗(E)的关系分别为:η_1=1.270η_2=3.175η_3(其中η_2=2.500η_3)、E_1=0.747E_2=0.249E_3(其中E_2=0.333E_3),其工业应用前景良好;通过提高O_3浓度、进气量、浆液循环量与液面高度、缩短O_3传输距离等方式均能进一步提高亚硫酸盐的氧化效果,从而提高脱硫效率。

A new wet desulfurization slurry forced oxidation technology, namely ozone in coordination with air jet aeration whose industrial application prospect and impacts on the oxidation characteristic of desulfurization slurry are discussed by changing different parameters, including ozone concentration and transmission distance, input air flow, slurry circulation flow, temperature, pH and liquid level, is put forward and studied by comparing the oxidation effect and energy consumption with jet aeration blast aeration. The experimental results show that, the relationship of ozone in coordination with air jet aeration in oxidation effect （,0） and energy consumption （E） between air jet aeration and blast aeration is： η = 1. 270η2 = 3. 175η3 （in which η2 = 2. 500η3 ） , η = 0. 747E2 = 0. 249E3 （ in which E2 = 0. 333E3 ） , respectively. Consequently, ozone in coordination with air jet aeration has a striking industrial application prospect and its oxidation effect on sulfite can be further improved by increasing ozone concentration, air inflow, slurry circulation flow and liquid level or reducing transmission distance of ozone.