丙酸钙高温协同脱硫脱硝的试验研究

在管式炉反应器上对丙酸钙高温条件下脱硫脱硝效果进行了试验研究。试验结果表明，煤中添加丙酸钙燃烧，硫、氮析出速率明显降低，SO2、NO排放量显著减少，1 000 ℃、按钙硫比为2的量向聊城贫煤中添加丙酸钙，单位质量煤粉SO2、NO排放量分别减少了6466%和4869%；脱硫脱硝效果受燃烧温度、煤的含硫量、钙硫比的影响；低温有利于脱硫，高温有利于脱硝；在相同钙硫比添加量下，煤种含硫量越高，丙酸钙脱硫脱硝效果越好；增大钙硫比可提高脱硫脱硝率，按钙硫比为2可以获得较为理想的脱硫脱硝率，继续添加丙酸钙，脱除效率提高不明显。

Experimental study on the high-temperature capture of SO2 and NOx by calcium propionate

The desulfurization and denitrification characteristics of calcium propionate were investigated on the tube furnace reactor. Results show that velocity of SO2 and NO release decreased for addition of calcium propionate. Efficiencies of sulfur and nitrogen reduction were 64.66 % and 48.69 % when calcium propionate was used in the calcium/ sulfur ratio being 2, 1000 ℃ combustion conditions. Furnace temperature, sulfur content, calcium/ sulfur ratio were important factors as for removing SO2 and NO. Low temperature was conducive to desulfurization while high temperature was conducive to denitrification. Either increasing coal’s sulfur content or calcium/ sulfur ratio could raise the desulfurization and denitrification efficiencies. Perfect efficiencies could be reached as calcium/ sulfur ratio being two and augmentation degree was inapparent with more calcium propionate addition.