煤化工水处理污泥对准东次烟煤热解和燃烧及气化性能的影响  

Effect of coal chemical water treatment sludge on pyrolysis and combustion and gasification performance of Zhundong subbituminous coal

作　　者：刘竞杰 马亚亚 张书培 杨晓勤 莫文龙[1] 任铁真 魏贤勇 樊星[1,4] LIU Jingjie;MA Yaya;ZHANG Shupei;YANG Xiaoqin;MO Wenlong;REN Tiezhen;WEI Xianyong;FAN Xing(State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,Key Laboratory of Clean Coal Transformation and Chemical Process of Xinjiang Uygur Autonomous Region,College of Chemical Engineering,Xinjiang University,830046 Urumqi,China;Xinjiang Yihua Chemical Company Limited,831100 Changji,China;Key Laboratory of Coal Processing and Efficient and Clean Utilization,School of Chemical Engineering and Technology,China University of Mining and Technology,221116 Xuzhou,China;School of Chemical and Biological Engineering,Shandong University of Science and Technology,266590 Qingdao,China)

机构地区：[1]省部共建碳基能源资源化学与利用国家重点实验室,煤炭清洁转化与化工过程新疆维吾尔自治区重点实验室,新疆大学化工学院,乌鲁木齐830046 [2]新疆宜化化工有限公司,新疆昌吉831700 [3]煤炭加工与高效洁净利用教育部重点实验室,中国矿业大学化工学院,江苏徐州221116 [4]山东科技大学化学与生物工程学院,山东青岛266590

出　　处：《煤炭转化》2024年第4期89-103,共15页Coal Conversion

基　　金：国家自然科学基金项目(22368045);昌吉回族自治州科技项目(2022Z04)。

摘　　要：解析煤化工水处理污泥(YS)的组成结构、微观形貌及官能团种类,探究不同实验气氛下其对准东次烟煤(ZSBC)热反应性能的影响,对于合理处置煤化工水处理污泥并实现其资源化利用具有较大现实意义。以ZSBC、YS和Y_(1)Z_(9)(YS与ZSBC按质量比为1∶9混合得到的样品)为研究对象,通过改变热量实验的气体氛围,研究不同反应气氛下YS对ZSBC热反应性能的影响。结果表明:ZSBC较YS富含固定碳和挥发分,而YS中的灰分含量较高且主要组成为含P,Ca和Fe等元素的化合物;YS的官能团种类较ZSBC的官能团种类更加丰富,且YS中主要为脂肪族化合物,而ZSBC中含有大量的芳香族化合物;惰性气氛下,YS的掺杂可以降低快速热解阶段(405℃~485℃)ZSBC活化能并增加指前因子,加快了Y_(1)Z_(9)在405℃~485℃温度段的反应进程;在氧化性气氛下,YS的掺杂可使ZSBC的着火点从475℃下降到443℃,综合燃烧特性指数(S)、燃烧稳定性指数(D)以及燃烧特性因子(A_(c))都得到增加;YS的掺杂可以降低380℃~550℃温度段ZSBC活化能并增加指前因子,促进Y_(1)Z_(9)在此温度段的燃烧反应;在二氧化碳气氛下,Y_(1)Z_(9)的平均初始反应性指数(R_(i))、反应性指数(R_(f))和平均终止反应指数(R_(s))均低于ZSBC的相应参数,表明YS的掺杂会延缓ZSBC的气化反应进程。It is of practical significance to analyze the composition,micromorphology and functional group types of the coal chemical water treatment sludge(YS) and explore its influence on the thermal reaction performance of Zhundong sub-bituminous coal(ZSBC) in different experimental atmospheres.This will enable the reasonable disposal and resource utilization of this kind of sludge.Used ZSBC,YS and Y_(1)Z_(9)(sample obtained by mixing YS and ZSBC in a mass ratio of 1∶9) as research object,by changed the gas atmosphere of the heat experiment,the effect of YS on the thermal reaction performance of ZSBC in diferent reaction atmospheres was studied.The results show that ZSBC is richer in fixed carbon and volatile matter compared to YS,while YS presents a higher ash content and is mainly composed of compounds containing P,Ca and Fe elements.The functional groups types of YS are more abundant than those of ZSBC,with the YS sample mainly comprising fatty compounds,while ZSBC containing a significant amount of aromatic compounds.In an inert atmosphere,doping YS can reduce the activation energy of ZSBC in the rapid pyrolysis stage(405 ℃-485 ℃),increase the pre-exponential factor,and accelerate the reaction process of Y_(1)Z_(9) at 405 ℃-485 ℃.In an oxidizing atmosphere,doping YS can reduce the ignition point of ZSBC from 475 ℃ to 443 ℃,and enhance the comprehensive combustion characteristic index(S),combustion stability index(D) and combustion characteristic factor(A_(C)).Doping YS can reduce the activation energy of ZSBC in the temperature range of 380 ℃-550 ℃ and increase the pre exponential factor,the combustion reaction of Y_(1)Z_(9) in the 380 ℃-550 ℃ stage is promoted.In a carbon dioxide atmosphere,the average initial reactivity index(R_(i)),reactivity index(R_(f)) and average termination reaction index(R_(s)) of Y_(1)Z_(9) are all lower than those of ZSBC,indicating that doping YS could delay the gasification reaction process of ZSBC.

关 键 词：水处理污泥 准东次烟煤 热解 燃烧 Coats-Redfern模型 

分 类 号：TQ534[化学工程—煤化学工程]