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以生物质直燃发电项目为研究对象,通过对引进北欧技术设计投产的电厂的运行情况进行分析,发现燃料特性(尤其是发热量、水分和灰分数据的准确性)是造成电厂给料系统缺陷、除尘器磨损和机组不能正常运行的主要原因.给出了生物质燃料特性的经验数据,为后续生物质直燃电厂的建设和运行提供了参考. 相似文献
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生物质发电是节能减排的手段之一,优化生物质电厂的主厂房布置对电厂的高效运行十分有利。本文以某30 MW生物质直燃发电厂为例,阐述了30 MW级生物质电厂的主机选型及参数,对主厂房布置特点进行了探讨与总结。从节约建设用地、合理组织工艺流程出发,对其主厂房的布置提出了若干优化方案。本文对我国该容量等级的生物质电厂主厂房布置设计具有参考意义。 相似文献
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生物质锅炉输料系统存在的问题及解决方案探讨 总被引:1,自引:0,他引:1
秸秆发电作为一种新生事物,是我国近年重点开发建设的可再生能源项目,2006~2008年国家先后投产了一批生物质电厂,生物质电厂为节能减排、资源综合利用、社会主义新农村建设和电源结构调整作出了重要的贡献.但生物质电厂在上料、出灰等技术上仍然存在瓶颈:文章综述了生物质电厂上料系统组成,剖析了上料系统在设计及运行中存在的系统易卡塞,料仓搭桥等问题及原因;结合实际对系统进行了一系列的改造;成功地解决了生物质电厂上料系统存在的技术问题,实现了生物质锅炉长周期连续稳定运行. 相似文献
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生物质直燃锅炉大都选用脉冲反吹式布袋除尘器,但由于生物质燃料燃烧烟气及飞灰的一些固有特性,布袋除尘器存在故障率高、滤袋更换频繁、维护成本较高等一系列问题。文中从以泗阳生物质电厂的实际运行经验为例,研究分析了布袋除尘器在生物质电厂存在问题的原因,并根据不同的情况,在设备改造和完善、运行监视和调整、滤带选型和使用等方面提出具体的解决措施和思路。 相似文献
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生物质发电存在燃料成本高,且农民出售秸秆的积极性也不高等问题。提出了一种降低集中式生物质发电厂燃料成本的改进方法,由生物质电厂购买收割机主动帮助农民免费收割,并就地打包运输秸秆,其秸秆归生物质电厂所有。通过成本计算得到,在改进方式下收集稻类秸秆价远低于市场价,利用提高年作业量的方式还可大幅降低生物质发电燃料成本。 相似文献
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针对生物质直燃电厂可否大规模发展的问题,对比了秸秆综合利用途径效益及消化能力,得出生物质直燃发电是我国现阶段最具现实意义的秸秆资源化利用技术。通过分析现有生物质直燃电厂存在的问题,获得了直燃电厂利用秸秆资源的关键在于直燃机组参数、容量、布局均要基于辐射区内秸秆冗余量来规划,同时政府在电价上要给予一定的配套支持。 相似文献
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本文提出一种新型水泥工业余热与生物质能互补发电系统,该系统采用水泥窑低温余热和生物质补燃有机结合的方式大幅提高水泥窑余热发电蒸汽参数与系统效率。来自水泥生产线窑头和窑尾的低温余热烟气全部用来加热工质水产生饱和蒸汽,饱和蒸汽进入生物质补燃系统中进行过热后送入汽轮发电机组中做功发电,补燃燃料为生物质气化燃气。本研究建立了单压和双压2种互补发电系统,分析了其热力学性能,结果表明:单压互补发电系统与传统单压纯低温发电系统相比,系统循环热效率和系统发电效率分别提高了1.63和1.92个百分点。双压互补发电系统与传统双压纯低温发电系统相比,系统循环热效率和系统发电效率分别提高了1.05和1.53个百分点。 相似文献
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Qibai Wu Thien Ching Qiang Guoxun Zeng Haiyan Zhang Ye Huang Yaodong Wang 《International Journal of Hydrogen Energy》2017,42(37):23871-23877
Palm oil is one of the most important oils in the world and huge amounts of palm biomass wastes are generated through palm oil extracting process which could endanger the environment. Meanwhile, electricity shortage is getting worse due to lack of fossil fuel. To convert biomasses from palm oil industry for power generation is a beneficial approach for both power shortage and environmental degradation. In order to investigate and optimize the generation process of power and heat from the waste biomass in palm oil industry, an analytic study of a combined heat and power plant in a palm oil mill fuelled with sustainable and renewable biomass wastes was conducted using ECLIPSE software through a case study in Malaysia. The resources of the biomass wastes in the mill were identified and the samples were collected on site. The waste samples were analysed in laboratory and their calorific value, chemical composition and biomethane potential were found. A simulation model was then set up using ECLIPSE software and the model was validated using the practical data of the CHP plant. Three different combinations of the biomass wastes, including EFB and Shell as fuel for power generation, MF co-firing with Biogas, and power generation using KS, EFB and Biogas with preheaters, were used in the simulation. It was found that all of the three combinations were able to produce enough electrical power and heat (steam) to meet the power and heat demand for the production process. The simulation results indicated that the palm solid biomass wastes and the biogas produced by mill effluent were able to provide enough sustainable and renewable fuel for the palm oil production process; and it is possible to provide extra electricity for the nearby area, which is one of the best option for utilization of palm oil biomass wastes. 相似文献
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《Renewable & Sustainable Energy Reviews》2008,12(5):1251-1276
The integration of biomass gasification with SOFCs offers the potential of highly efficient and renewable power generation, primarily in modular solutions. SOFC seems to be the most promising fuel cell technology of biomass gasifier producer gases. Solid oxide fuel cells, because of their high operating temperature, do not require pure hydrogen as fuel, exhibiting high fuel flexibility. Sufficient amounts of cereal, cotton, corn, olive, coffee or palm tree residues are available in Mediterranean areas, while the climatic conditions are favorable for energy crops cultivations. Their residues can be utilized for electricity production by modular biomass gasification-based solid oxide fuel cells (SOFC). 相似文献
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Energy consumption has risen in Malaysia because of developing strategies and increasing rate of population. Depletion of fossil fuel resources, fluctuation in the crude oil prices, and emersion of new environmental problems due to greenhouse gasses effects of fossil fuel combustion have convinced governments to invest in development of power generation based on renewable and sustainable energy (RSE) resources. Recently, power generation from RSE resources has been taken into account in the energy mix of every country to supply the annual electricity demand. In this paper, the scenario of the energy mix of Malaysia and the role of RSE resources in power generation are studied. Major RSE sources, namely biomass and biogas, hydro‐electricity, solar energy, and wind energy, are discussed, focusing more toward the electrical energy demand for electrification. It is found that power generation based on biomass and biogas utilization, solar power generation, and hydropower has enough spaces for more development in Malaysia. Moreover, minihydropower and wind power generation could be effective for rural regions of Malaysia. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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25MW生物质直燃发电项目及其效益分析评价 总被引:2,自引:0,他引:2
生物质直燃发电作为可再生能源利用的一种形式,近年来在我国得到大力发展。本文介绍了生物质直燃发电技术的原理、工艺流程及发电系统构成;以典型机组配置的25MW生物质直燃发电项目为例,分析了其带来的经济效益、生态效益和社会效益;并对生物质直燃发电两大难题——燃料收集困难和发电运营成本偏高提出了建议。从而得出了对于该类项目具有现实指导意义的结论,为我国开展大型生物质直燃发电项目提供了理论参考依据。 相似文献