基于Aspen Plus的煤-炼化污泥高温气化特性分析  

Analysis of gasification characteristics of coal-petrochemical sludge at high temperature based on Aspen Plus

作　　者：陈延贵 张纹齐 王银峰 廖传华[1] 朱跃钊[1,2] CHEN Yangui;ZHANG Wenqi;WANG Yinfeng;LIAO Chuanhua;ZHU Yuezhao(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,Jiangsu,China;School of Energy Science and Engineering,Nanjing Tech University,Nanjing 211816,Jiangsu,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816 [2]南京工业大学能源科学与工程学院,江苏南京211816

出　　处：《化工进展》2021年第10期5786-5793,共8页Chemical Industry and Engineering Progress

基　　金：中国石化股份有限公司项目(419035-2);江苏省重点研发计划(BE2020115)。

摘　　要：高温气化-熔融技术是炼化污泥无害化处置和资源化利用的关键技术之一。炼化污泥-煤高温共气化可将危废中的重金属、飞灰熔融,二英高温热阻断,同时以合成气为产品,可实现处置过程趋零排放和产品高值化利用。本文基于Aspen Plus软件,建立了煤-炼化污泥高温气化过程的平衡模型,研究了氧耗比、掺混比对气化特性的影响以及两者共气化的协同作用。结果表明:随着氧耗比增加,合成气中CO和H_(2)先增加后减小;随着掺混比的增加(10%~50%),气化所需的最佳氧耗比由0.72降至0.43,合成气热值由11.1MJ/m^(3)降至10.4MJ/m^(3)。炼化污泥与煤共气化,可更高效地利用污泥中的水分且具有一定的节氧效果;有效合成气(CO和H_(2))相较单独气化而言增加了1.0%~7.1%。此外,为满足高温熔融(1350℃)要求,掺混比应不高于30%。High temperature gasification-melting technology is one of the key technologies for harmless disposal and resource utilization of petrochemical sludge.The high temperature co-gasification of the petrochemical sludge-coal can melt the heavy metals and fly ash in the hazardous wastes and block the dioxins,and the syngas is taken as the product.The disposal process can realize zero emission and high value utilization of products.In this paper,an equilibrium model of coal-petrochemical sludge gasification process at high temperature was established based on Aspen Plus software,and the effects of oxygen consumption ratio and blend ratio on gasification characteristics as well as the synergetic effect of co-gasification were studied.The results show that CO and H_(2)in syngas increase first and then decrease with the increase of oxygen consumption ratio.With the increase of blend ratio(10%-50%),the optimal oxygen consumption ratio required for gasification decreases from 0.72 to 0.43,and the calorific value of syngas decreases from 11.1MJ/m^(3)to 10.4MJ/m^(3).The co-gasification of the sludge and coal can make more efficient use of the water in the sludge and has a certain efficiency of oxygen saving.The effective syngas(CO and H_(2))increases by 1.0%-7.1%compared with gasification alone.In addition,in order to meet the requirements of high temperature melting(1350℃),the blend ratio should not be higher than 30%.

关 键 词：炼化污泥 气化熔融 掺混比 合成气 Aspen Plus 

分 类 号：X74[环境科学与工程—环境工程]