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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.1; 20070514-17; Montreal(CA) >Predicting The Performance of System for The Co-Production of Fischer-Tropsch Synthetic Liquid and Power from Coal
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Predicting The Performance of System for The Co-Production of Fischer-Tropsch Synthetic Liquid and Power from Coal

机译：煤合成费-托合成液和动力系统的性能预测

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摘要

A co-production system based on FT synthesis reactor and gas turbine was simulated and analyzed. Syngas from entrained bed coal gasification was used as feedstock of low temperature slurry phase Fischer-Tropsch reactor. Raw synthetic liquid produced was fractioned and upgraded to diesel, gasoline and LPG. Tail gas composed of unconverted syngas and F-T light component was fed to gas turbine. Supplemental fuel (NG, or refinery mine gas) might be necessary, which was dependent on gas turbine capacity, expander through flow capacity, etc. FT yield information was important to the simulation of this co-production system. A correlation model based on Mobil's two step pilot plant was applied. This model proposed triple chain-length-dependent chain growth factors and set up correlations among reaction temperature with wax yield, methane yield, and C_2-C_(22) paraffin and olefin yields. Oxygenates in hydrocarbon phase, water phase and vapor phase were also correlated with methane yield. It was suitable for syngas, iron catalyst and slurry bed. It can show the effect of temperature on products' selectivity and distribution. Deviations of C_(5+) components yields and distributions with reference data were less than 3%. To light gas components were less than 2%. User models available to predict product yields, distributions, cooperate with other units and do sensitive studies were embedded into Aspen plus simulation. Performance prediction of syngas fired gas turbine was the other key of this system. The increase in mass flow through the turbine affects the match between compressor and turbine operating conditions. The calculation was carried out by GS software developed by Politecnico Di Milano and Princeton University. The simulated performance assumed that the expander operates under choked conditions and turbine inlet temperature equals to NG fired gas turbine. A "F" technology gas turbine was selected to generate power. Various cases were investigated so as to match FT synthesis island, power island and gasification island in co-production systems. Effects of CO_2 removal/LPG recovery, co-firing, CH_4 content variation were studied. Simulation results indicated that more than 50% of input energy was converted to electricity and FT products. Total yield of gasoline, diesel and LPG was 136g-155g/NM~3(CO+H_2). At coal feed 21.9kg/s, net electricityexported to grid was higher than 100MW. Total production of diesel and gasoline (and LPG) was 118,000 tons(134,000tons)/Year. Under economic analysis conditions assumed in this paper, co-production system was economic feasible. The after tax profits can research 17 million EURO. Payback times were ranged from 6-7years.
机译：对基于FT合成反应器和燃气轮机的联合生产系统进行了仿真分析。来自夹带床煤气化的合成气用作低温淤浆相费-托反应器的原料。将生产的原始合成液体分馏并升级为柴油，汽油和液化石油气。由未转化的合成气和F-T轻组分组成的尾气被送入燃气轮机。可能需要补充燃料（NG或炼厂矿井瓦斯），这取决于燃气轮机的容量，通过流量的膨胀机等。FT产量信息对于此联产系统的仿真非常重要。应用了基于美孚两步试验工厂的相关模型。该模型提出了三链长相关的链增长因子，并建立了反应温度与蜡产率，甲烷产率，C_2-C_（22）石蜡和烯烃产率之间的相关性。烃相，水相和气相中的含氧物也与甲烷产率相关。适用于合成气，铁催化剂和浆床。它可以显示温度对产品选择性和分布的影响。 C_（5+）组分的得率和分布与参考数据的偏差小于3％。轻气成分少于2％。可用于预测产品产量，分布，与其他部门合作并进行敏感研究的用户模型已嵌入Aspen plus仿真中。合成气燃气轮机的性能预测是该系统的另一个关键。通过涡轮的质量流量的增加会影响压缩机和涡轮运行条件之间的匹配。计算是由米兰理工大学和普林斯顿大学开发的GS软件进行的。模拟性能假定膨胀机在节流条件下运行，并且涡轮机入口温度等于NG燃气轮机。选择了“ F”技术燃气轮机来发电。为了在联合生产系统中匹配FT合成岛，动力岛和气化岛，对各种情况进行了研究。研究了CO_2去除/ LPG回收，共烧，CH_4含量变化的影响。仿真结果表明，超过50％的输入能量被转换为电力和FT产品。汽油，柴油和液化石油气的总产量为136g-155g / NM〜3（CO + H_2）。以21.9kg / s的煤炭进料量，输往电网的净电力高于100MW。柴油和汽油（及液化石油气）的总产量为每年118,000吨（13.4万吨）。在本文假设的经济分析条件下，联产制经济可行。税后利润可研究1,700万欧元。投资回收期为6-7年。

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