共查询到16条相似文献,搜索用时 93 毫秒
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本文根据生物质能源具有的自身特点,提出一个适合生物质能源利用的新型多联产系统.在原有天然气基甲醇生产系统中增加生物质气化子系统,充分利用天然气-水蒸气重整与生物质气化制取合成气中碳氢有效成分互补的特点,通过合理配气满足最佳的甲醇合成要求,因此屏蔽掉了变换,补碳,脱碳等分产必需的工艺过程,同时借助动力系统实现未反应气的合理利用,在满足较高的甲醇产率前提下降低了化工产品能耗,动力系统借助化工过程克服燃料燃烧过程品位损失过大的难题,是组分对口分级转化能量梯级利用的本质体现.针对不同天然气生物质输入比情况下合成气一次性通过,以及最佳输入比情况下未反应气适度循环两种方案,本文分别进行了深入分析,具有8%~14%的节能潜力.为生物质能的高效应用以及缓解能源危机提供了一条有效的途径. 相似文献
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新型双燃料重整联合循环发电系统 总被引:2,自引:1,他引:1
本文提出了一种新型双燃料重整联合循环发电系统。该系统通过重整反应实现了煤和天然气的综合利用,煤的燃烧过程为天然气/水蒸汽重整反应提供了高温反应热,通过双燃料重整煤的部分化学能间接转化到合成气中,然后合成气进入联合循环燃烧作功。研究结果表明双燃料联合循环的供电效率为49.4%-53.2%,煤的折合供电效率为42.4%-44.6%,与IGCC(动力部分相同时为44%-46%)相比供电效率降低1-2个百分点,但是投资大约降低30%。本文的研究开拓性地为煤的清洁高效利用提供了新途径。 相似文献
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在联产系统能量和物质转换过程模拟和分析的基础上,重点研究了热功转换过程及其与甲醇合成过程的相互影响.得到部分联产率对系统输出功、甲醇合成压缩机耗功、甲醇产量、合成塔副产蒸汽的影响.并对比了动力独立生产系统和部分联产系统供电效率. 相似文献
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Peiyuan Pan Meiyan Zhang Weike Peng Heng Chen Gang Xu Tong Liu 《Entropy (Basel, Switzerland)》2020,22(11)
A novel compressed air energy storage (CAES) system has been developed, which is innovatively integrated with a coal-fired power plant based on its feedwater heating system. In the hybrid design, the compression heat of the CAES system is transferred to the feedwater of the coal power plant, and the compressed air before the expanders is heated by the feedwater taken from the coal power plant. Furthermore, the exhaust air of the expanders is employed to warm partial feedwater of the coal power plant. Via the suggested integration, the thermal energy storage equipment for a regular CAES system can be eliminated and the performance of the CAES system can be improved. Based on a 350 MW supercritical coal power plant, the proposed concept was thermodynamically evaluated, and the results indicate that the round-trip efficiency and exergy efficiency of the new CAES system can reach 64.08% and 70.01%, respectively. Besides, a sensitivity analysis was conducted to examine the effects of ambient temperature, air storage pressure, expander inlet temperature, and coal power load on the performance of the CAES system. The above work proves that the novel design is efficient under various conditions, providing important insights into the development of CAES technology. 相似文献
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基于品位匹配和多能源综合梯级利用的原则,本文提出了低CO2排放的太阳能与化石能源互补发电系统LESOLCC,并对其进行了热力经济性能分析。所提系统以甲醇为燃料,中低温太阳能首先提供甲醇重整反应的反应热,从而转化为富氢合成气的化学能,实现品位提升;其次通过燃烧前对CO2的捕集,实现燃料的清洁燃烧,最终在高效联合循环中实现其热功转换。结果表明:基本工况下,系统当量效率达到55.1%,比投资为833$/kW,发电成本为0.124$/kWh,回收期17年;与相同化石燃料输入及CO2捕集水平的尾气捕集CO2的常规燃气-蒸汽联合循环(CC-Post)相比,发电成本下降了10.1%,充分显示其优越性。 相似文献
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Review of proton conductors for hydrogen separation 总被引:1,自引:0,他引:1
There is a global push to develop a range of hydrogen technologies for timely adoption of the hydrogen economy. This is critical in view of the depleting oil reserves and looming transport fuel shortage, global warming, and increasing pollution. Molecular hydrogen (H2) can be generated by a number of renewable and fossil-fuel-based resources. However, given the high cost of H2 generation by renewable energy at this stage, fossil or carbon fuels are likely to meet the short- to medium-term demand for hydrogen. In view of this, effective technologies are required for the separation of H2 from a gas feed (by-products of coal or bio-mass gasification plants, or gases from fossil fuel partial oxidation or reforming) consisting mainly of H2 and CO2 with small quantities of other gases such as CH4, CO, H2O, and traces of sulphur compounds. Several technologies are under development for hydrogen separation. One such technology is based on ion transport membranes, which conduct protons or both protons and electrons. Although these materials have been considered for other applications, such as gas sensors, fuel cells and water electrolysis, the interest in their use as gas separation membranes has developed only recently. In this paper, various classes of proton-conducting materials have been reviewed with specific emphasis on their potential use as H2 separation membranes in the industrial processes of coal gasification, natural gas reforming, methanol reforming and the water–gas shift (WGS) reaction. Key material requirements for their use in these applications have been discussed. 相似文献