摘要
传统的用来生产工业和民用中等热值气体的生物质热解过程面临着两个缺点,即产气率低和高含量的气相焦油蒸汽引起的下游设备的腐蚀.为克服这些缺点,在保证热解气热值几乎不变的条件下,在实验室内的一套热解系统中研究了运行和设计参数对生物质热解过程的影响.研究的参数包括反应温度、挥发相在热解炉中的停留时间、生物质原料颗粒的预处理、外部加热炉的加热速率和热解炉的热质传递能力.此外,本文还研究了一个独立的裂解炉的运行温度和热解炉的几何形状对燃料气生产的影响.结果表明,上述参数对生物质热解气的产率是敏感的,而且热解气的热值始终在13～15MJ/m3之间变化.这一热值确保热解气可以较好地用作燃气轮机的动力燃料或炊事燃料.
Conventional biomass pyrolysis process in the production of medium heating value of gas for industrial or civil application has two disadvantages: low gas productivity and accompanying corrosion in downstream equipment caused by high content of tar vapour carried out in gas phase. The objective of this paper is to overcome these disadvantages and thereby the effect of the operating and design parameters on biomass pyrolysis are investigated in a laboratory-made set-up under-the condition of the heating value of product gas being almost unchanged. The studied parameters include reaction temperature, residence time of volatile phase in the pyrolyser, physico-chemical pretreatment of biomass particles, the heating rate of the external heating furnace and the improvement of heat and mass transfer ability of the pyrolyser. The running temperature of a separate cracking reactor and the geometrical configuration of the pyrolyser are studied. However, different types of catalysts are not used in this work to determine their positive influences on biomass pyrolysis behaviour. The results indicate that fuel gas production from biomass pyrolysis is sensitive to operating parameters mentioned above, and only slightly sensitive to the design parameter. The heating value of fuel gas is up to 13-15 MJ/Nm3 and therefore it can be effectively used as the substitute for cooking gas or fuel gas in powering gas turbine and/or gas engine.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2004年第5期438-443,共6页
Journal of Combustion Science and Technology
基金
欧盟资助项目(ASI/B7 301/2598/07 2002/62706).
关键词
生物质
热解
燃料气
参数
Gas engines
Gas fuels
Gas turbines
Mass transfer
Physical chemistry
Pyrolysis
