共查询到17条相似文献,搜索用时 125 毫秒
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1 中型生物质气化发电系统。中型生物质气化发电系统一般采用流化床气化工艺,发电规模为400~3000kW。中型生物质气化发电系统在发达国家应用较早,所以技术较成熟,但由于设备造价很高,发电成本居高不下,所以,在发达国家应用极少。近年来,我国开发出了循环流化床气化发电系统,由于该系统有较好的经济性,所以在我国推广很快,已经成为国际上应用最多的中型生物质气化发电系统。 相似文献
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中科院广州能源研究所承担的“十五”863项目“生物质气化发电优化系统及其示范工程”,目前已取得阶段性成果.开发出适合我国国情的生物质中小型气化发电系统。采用循环流化床气化炉和多级气化净化装置。配置多台200-400kW的单气体燃料内燃发电机组,用谷壳、木屑、稻草等多种生物质作原料,可以在不同的负荷下运行。 相似文献
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生物质流态化催化气化技术工程化研究 总被引:16,自引:0,他引:16
在研究开发的内循环锥形流态化气化炉内。对稻草、麦草等软秸秆物料粉碎后,或者直接使用木屑等细粉状原料,进行了热解气化和催化气化的工程化应用试验研究。研究结果表明:气化反应在600—820℃的一个较宽温度范围内,均能稳定连续运行。麦草原料气化所产生的煤气热值比稻草和稻壳都高,其热值可达7716kJ/m^3。木屑气化所产生煤气热值最高则达9064kJ/m^3,远远高于一般生物质气化煤气。对流化床气化来讲,即使在非催化气化条件下,其气化产生的煤气热值比采用下吸式气化炉产生的煤气热值提高40%左右,并且气化温度较固定床(上吸式、下吸式)气化炉低。同时进行的催化气化试验发现,催化剂CaO能明显提高煤气热值、降低CO组分,Na2CO3催化气化能提高气体H2的含量。在800℃试验时,添加催化剂能明显提高气体的热值。 相似文献
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《International Journal of Hydrogen Energy》2004,29(7):701-707
A novel biomass gasification (first stage of hydrogen production from biomass) process using a supercritical water fluidized bed was proposed and the fundamental design of the process was conducted. The flow rate was determined by evaluating the minimum fluidization velocity and terminal velocity of alumina particles enabling fluidization with the thermodynamic properties of supercritical water. Three cases were examined: a bubbling fluidized bed in which water was used mainly as the fluidized medium and biomass were added for gasification, a bubbling fluidized bed fluidized by biomass slurry feed alone, and a fast fluidized bed fluidized by biomass slurry feed alone. According to calculations of the residence time and thermal efficiency assuming heat recovery with a heat exchanger efficiency of 0.75, the bubbling fluidized bed fluidized by biomass slurry alone was appropriate for continuous biomass gasification using a fluidized bed. 相似文献
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分析了近年来生物质流化床气化炉的结焦研究的状况,总结了影响生物质流化床气化过程中结焦的因素和确定结焦时最小流化速度的几类计算方法。分析了辽宁营口160kW气化装置结焦过程中运行参数的变化情况,给出防止结焦发生的一些措施。 相似文献
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Gasification of lignocellulosic biomass in fluidized beds for renewable energy development: A review
Zainal Alimuddin Bin Zainal Alauddin Pooya Lahijani Maedeh Mohammadi Abdul Rahman Mohamed 《Renewable & Sustainable Energy Reviews》2010,14(9):2852-2862
A literature review on gasification of lignocellulosic biomass in various types of fluidized bed gasifiers is presented. The effect of several process parameters such as catalytic bed material, bed temperature and gasifying agent on the performance of the gasifier and quality of the producer gas is discussed. Based on the priorities of researchers, the optimum values of various desired outputs in the gasification process including improved producer gas composition, enhanced LHV, less tar and char content, high gas yield and enhanced carbon conversion and cold gas efficiency have been reported. The characteristics and performance of different fluidized bed gasifiers were assessed and the obtained results from the literature have been extensively reviewed. Survey of literature revealed that several industrial biomass gasification plants using fluidized beds are currently conducting in various countries. However, more research and development of technology should be devoted to this field to enhance the economical feasibility of this process for future exploitations. 相似文献
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生物质富氧气化特性的研究 总被引:15,自引:4,他引:15
富氧气化是先进的中热值气化方法之一,具有设备体积小,运行稳定等优点。从富氧气化的原理出发,分析氧气浓度,气化当量比等因素对气化结果的影响,并在实验的基础上,分析讨论提高了富氧气化经济性和实用性的途径,总结得到的循环流化床富氧气化的最佳运行条件:氧气浓度,气化当量比约0.15。 相似文献
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生物质作为一种可再生的洁净能源,其气化技术得到大力发展。本文对生物质气化的基本原理及气化工艺类型进行了简要介绍,同时阐述了主要气化炉类型的工作原理及优缺点,如固定床原料适应性广,但难以大型化,流化床气化效率高但结构复杂;并对气化炉的特性进行浅析,对生物质气化工程的设计及运行具有指导意义。 相似文献