摘要
为实现煤炭的清洁高效低碳利用,结合粉煤部分气化、半焦燃烧实现煤炭的煤气、电力分级分质利用,采用Aspen Plus流程模拟软件针对300 MW煤粉锅炉进行了煤粉部分气化、半焦燃烧的煤气、电力多联产系统模拟研究。首先在一定假设条件下,使用Aspen Plus软件建立了基于反应平衡原理的煤气化模型,并将模拟计算结果与试验台架气化结果进行比对验证,模拟结果与试验结果基本吻合。在此煤气化模型的基础上探究了氧煤比和煤种对气化炉出口的煤气组成以及300 MW多联产系统经济效益的影响规律。计算结果显示,氧煤比从0.1提高到0.3时,神府东胜煤煤气化的有效气产率从58.49%提高到82.85%,多联产系统增加的年收益从16084万元增加到62246万元;氧煤比为0.3时,神府东胜煤、巩义无烟煤、神华烟煤和锡盟褐煤煤气化的有效气产率分别为82.85%、74.51%、77.21%和95.16%,以前3者煤种为原料的多联产系统增加的年收益分别为46392万元、28910万元和62246万元。在模拟的氧煤比范围内,随着氧煤比升高,煤气品质、有效气产率以及多联产系统的经济效益均明显提高;在氧煤比为0.3的工况下,使用神府东胜煤作为原料时系统经济效益最优,其次是神华烟煤以及巩义无烟煤,锡盟褐煤由于煤气化后产生半焦量过低不利于多联产系统的运作。
In order to realize the clean,efficient and low-carbon utilization of coal,combined with partial coal gasification and semi-coke combustion to realize the grading and separating utilization of coal-gas and electricity,the Aspen Plus process simulation software was used to simulate the partial pulverized coal gasification and semi-coke combustion of gas and electric power polygeneration system for 300 MW coal powder boiler.First,under certain assumptions,a coal gasification model based on the principle of reaction equilibrium was established by using Aspen Plus software,and the simulation results were compared with the experimental bench gasification results,and the simulation results were basically consistent with the experimental results.On the basis of this coal gasification model,the influence of oxygen-to-coal ratio and coal type on the gas composition at the outlet of the gasifier and the economic benefit of the 300 MW polygeneration system was explored.The calculation results show that the effective gas production rate of Shenfu Dongsheng coal gasification increases from 58.49%to 82.85%when the oxygen-to-coal ratio increases from 0.1 to 0.3,and the increased annual revenue of the polygeneration system increases from 160.84 million yuan to 622.46 million yuan;when the oxygen-to-coal ratio is 0.3,the effective gas production rates of Shenfu Dongsheng coal,Gongyi anthracite,Shenhua bituminous coal and Ximeng lignite coal gasification are 82.85%,74.51%,77.21%and 95.16%,respectively.The increased annual income of the polygeneration system by using the three coal types as raw materials is 463.92 million yuan,289.1 million yuan and 62.46 million yuan,respectively.It is concluded that the gas quality,effective gas production rate,and the economic benefits of the polygeneration system are significantly improved within the simulated range of oxygen-to-coal ratio,as the oxygen-to-coal ratio increases;in the operating condition where the oxygen-to-coal ratio is 0.3,the economic benefits of the system are the best when using Shenfu Dongsheng coal as the raw material,followed by Shenhua bituminous coal and Gongyi anthracite.The semi-coke produced by coal gasification of Ximeng lignite is too low to be conducive to the operation of the polygeneration system.
作者
陈嘉豪
袁野
何勇
王智化
谭佳昕
朱燕群
岑可法
CHEN Jiahao;YUAN Ye;HE Yong;WANG Zhihua;TAN Jiaxin;ZHU Yanqun;CEN Kefa(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
出处
《洁净煤技术》
CAS
2020年第5期20-25,共6页
Clean Coal Technology
基金
国家重点研发计划资助项目(2018YFB1502900)。
关键词
煤粉
部分气化
半焦燃烧
多联产
稳态模拟
pulverized coal
partial gasification
semi-coke combustion
polygeneration
steady-state simulation
