煤化工污泥性质及其热干化特性  

Coal chemical sludge properties and thermal drying characteristics

作　　者：彭雅 袁进 周印羲 余丽 吉伟 石万 PENG Ya;YUAN Jin;ZHOU Yinxi;YU Li;JI Wei;SHI Wan(College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,Shanxi Province,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西晋中030600

出　　处：《化学工程》2024年第2期66-71,共6页Chemical Engineering(China)

基　　金：工业窑炉协同处置固体废物技术创新平台(YDZX20191400002883)。

摘　　要：煤化工污泥是煤化工废水经过生化处理后产生的污染物,含酚类、芳香烃类等有毒有害物质,将煤化工污泥掺烧发电是一种有效的处置方式,处置前需对其进行干化处理。文中对煤化工污泥的性质进行了分析,研究了温度、CaO的添加比例和转速对煤化工污泥热干化特性的影响。热干化后,煤化工污泥中大分子有机物发生分解,重金属残渣态增多,其环境风险降低。当温度从110℃升高到200℃时,干化速率最大提高了190%;当转速从0升高到10 r/min时,干化速率最大提高了20%。当CaO的添加比例小于2%时,不利于煤化工污泥的干化过程;当CaO的添加比例大于2%时,干化速率提高,最大提高了26.7%,通过三维荧光光谱(3D-EEM)分析煤化工污泥中DOM(溶解性有机物),发现微生物代谢产物占比减少,因此有利于煤化工污泥的干化。Coal chemical sludge is a pollutant produced by biochemical treatment of coal chemical wastewater,containing phenol,aromatic hydrocarbon and other toxic and harmful substances.Coal chemical sludge co-combustion for power generation is an effective sludge disposal,before which sludge needs to be dried.The properties of coal chemical sludge were analyzed and the effects of temperature,CaO addition ratio and rotational speed on the thermal drying characteristics of coal chemical sludge were studied.After the thermal drying of coal chemical sludge,macromolecular organic compounds decomposes,the residual state of heavy metals increases,and thus the environmental risk reduces.When the temperature increases from 110℃to 200℃,the drying rate is enhanced by 190%.When the rotational speed increases from 0 to 10 r/min,the drying rate is improved by 20%.When CaO addition ratio is less than 2%,it is not conducive to sludge drying process.When CaO addition ratio is above 2%,the drying rate rises which is not higher than that of 26.7%.The 3D-EEM spectrum was used to analyze the DOM(dissolved organic matter)in the coal chemical sludge.It is found that the proportion of microbial metabolites decreases,which is beneficial to sludge drying.

关 键 词：煤化工污泥 热干化 氧化钙 

分 类 号：X703[环境科学与工程—环境工程] TQ09[化学工程]