污泥水煤浆的燃烧固硫试验研究

在管式固定床上进行了污泥水煤浆的燃烧试验,着重研究了燃烧温度、Ca/S摩尔比和固硫剂种类等因素对污泥水煤浆燃烧固硫的影响.结果表明:随着燃烧温度的上升,污泥水煤浆的固硫率先升高后降低,在850℃时污泥水煤浆的固硫率明显高于其他燃烧温度条件下的固硫率.随着Ca/S摩尔比的增加,污泥水煤浆的固硫率呈明显的上升趋势,但是Ca/S摩尔比从1.5增加到2.0时,其固硫率上升趋于平缓.综合考虑经济性因素,污泥水煤浆燃烧固硫的优化钙硫摩尔比应为1.5.污泥水煤浆燃烧时SO2析出规律与Ca(OH)2的分解规律相对比较一致,因此,Ca(OH)2的固硫效果优于CaCO3.试验为污泥水煤浆的工业化应用提供了理论基础.

Experimental study on combustion desulfurization of sludge coal water slurry

Tests of combustion of sludge coal water slurry（S-CWS） were conducted in a fixed bed oven.Effects of combustion temperature,Ca/S molar ratio and desulfurizer kinds on desulfurization rate were investigated.Results showed that when combustion temperature was raised,desulfurization rate increased at first and then decreased,and desulfurization rate at the temperature of 850 ℃ obviously was higher than that at other temperatures.With the increase of Ca/S molar ratio,desulfurization rate increased obviously.However,desulfurization rate increased relatively slowly when Ca/S molar ratio increased from 1.5 to 2.0.The optimum Ca/S molar ratio of sludge coal water slurry（S-CWS） should be 1.5 when economic factor is taken into consideration.The desulfurization effect of Ca（OH）2 is better than that of CaCO3 because the emission characteristics of SO2 is consistent with the decomposition pattern of Ca（OH）2.The test provides a solid basis for the industrial application of sludge coal water slurry.