煤炭地下气化制液化天然气技术经济性分析

为了核算煤炭地下气化制液化天然气(UCG-LNG)技术的经济可行性,在试验数据的基础上,以年产液化天然气2亿m3的UCG-LNG项目为例,计算了项目的总投资额,以及工程费用和天然气生产成本的构成及各项占比,并分析了项目的敏感性。结果表明,项目总投资约18.7亿元,总投资的88.3%为工程费用,而在工程费用中,空分设备、煤气净化设备以及天然气液化设备的总费用占比高达69.5%;在天然气销售价格为3.21元/m3时,整个项目的税前内部收益率(IRR)为10.90%,投资回收期为9.85 a(含3 a建设期),经济上可行,敏感性分析得出天然气销售价格对项目IRR的影响最大。

Technical and economic analysis of underground coal gasification combined synthetic liquefied natural gas

In order to analyze the economic feasibility of the technology of underground coal gasification combined synthetic liquefied natural gas (UCG-LNG),based on the experimental data,taking the UCG-LNG project with an annual output of 200 million cubic meters LNG as example,the project's total investment,items and percentage of each item in the engineering cost and LNG production cost were calculated,and the project's sensitivity was analyzed.The results showed that the total investment was about RMB 1.87 billion,of which 88.3％ was engineering fee,while in the engineering fee,the total investment of air separation equipment,coal gas purification equipment and equipment of liquefied natural gas was up to 69.5％.In the condition of the LNG sale price was 3.21 ￥/m3,the project's pre-tax internal rate of return (IRR) was 10.90％,the investment recovery period was 9.85 years (including 3 years of construction period),it was economically feasible.Sensitivity analysis showed that the LNG's sales price had the most evident influence on the project's IRR.