煤炭分级转化利用多联产系统是一种新颖的煤基多联产系统。煤首先经热解生成热解气和半焦，热解气再经冷却分离出液态焦油和气态热解气。焦油直接作为高价值产品输出，热解气可用于甲醇合成，剩余的半焦直接进入循环流化床燃烧炉燃烧生成蒸汽用于燃气蒸汽联合循环发电。在煤炭分级转化利用多联产系统中，最重要的单元是双流化床单元和气体净化单元。本文借助 Aspen Plus 软件对煤炭分级转化多联产利用系统的主要单元进行了模拟。煤种选用榆林烟煤，给煤量为 227t/h。模拟结果得出了双流化床单元产生的合成气的主要成分、气体净化单元净化后的合成气的主要成分以及主要设备的投资金额。 27089
毕业论文关键词 煤基多联产；煤热解；半焦燃烧；流程模拟
Title Process Simulation and Economic Analysis of Coal Staged Conversion Utilization Polygeneration System
Abstract Coal staged conversion utilization polygeneration system is a novel coal polygeneration system. The coal pyrolysis firstly produces pyrolysis gas and semicoke , th
en pyrolysis gas is cooled to isolate liquid tar and gaseous pyrol
ysis gas.Tar can be output as products of high value , and pyroly
sis gas can be used in the composition of methanol, the left semi
coke can be burned in circulating fluidized bed boiler to get stea
m which can be utilized to generate electricity in gas-steam combin
ed cycle.The most important parts are Dual fluidized bed unit and Gas purification
unit in Coal staged conversion utilization polygeneration system a
novel coal polygenerationsystem .
Aspen Plus is utilized in this paper to simulate the main
unit in a coal staged conversion utilization polygeneration system.Yu
lin bituminous coal is chosen in this simulation and the coal feed
amount is 227t/h. The investment of the main equipments and main c
omponents of the synthesis gas generated in double fluidized bed un
it and gas purification unit are obtained from the simulation results.
Keywords Coal Polygeneration；Coal Pyrolysis；Semicoke Combustion； Process Simulation
目 次
1 绪论 1
1.1多联产系统介绍 . 1
1.2 煤炭分级转化利用 5
1.3 多联产系统主要单元模拟过程介绍 6
1.4 多联产系统模拟平台 Aspen Plus 软件介绍. 6
2 煤炭分级转化多联产利用系统关键单元的流程模拟 8
2.1 引言 8
2.2 双流化床单元 8
2.3 气体净化单元 12
3 煤炭分级转化多联产利用系统主要单元的设备投资计算 16
结论 18
致 谢 19
参考文献 20
1 绪论
1.1多联产系统介绍
多联产系统的实质是一种煤气处理工艺，它是指指利用煤来生产主要成分为一氧化碳和 煤炭分级转化多联产利用系统的全流程模拟和经济性分析:http://www.youerw.com/jixie/lunwen_21478.html