生物质掺烧发电存在问题及探讨

Discuss on the Problems of Biomass Co-Firing Power Generation Technology

近年来,国家对碳减排的要求不断加强,燃煤发电是CO2排放的主要来源之一。对于火力发电碳减排的需求而言,掺烧生物质是一种有效的应对措施。常见的生物质掺烧技术可分为直接掺烧和间接掺烧两种。直接掺烧技术将生物质送入锅炉,新建设备较少,成本较低,目前应用较广。间接掺烧技术将生物质气化后的燃气送入锅炉燃烧,该技术的原料适应性较广,能避免结焦结渣等现象,但需新建设备较多,投资较高,目前应用较少。本文介绍了近年来国内生物质掺烧发电技术现状,阐述了其中存在的问题,同时,根据笔者的调研经验,对生物质掺烧发电技术的发展进行了探讨。

The requirements of carbon reduction have been enhanced recent years in China. Power generation is a main source of CO2 emission. For power generation plants, biomass and coal co-firing an effective method for carbon reduction. In general, biomass and coal co-firing for power generation have 2 ways： direct and indirect co-firing. The direct co-firing way send biomass into the boiler together, then biomass and coal combust for power generation. This method could build less equipment, and save the investment. Thereby, the direct co-firing method is used much wider. The indirect co-firing gasifies biomass first, and then send bio-gas into the boiler for power generation. This method have several advantages： high adaptability for biomass, could avoid coking and slagging. However, the indirect way need to build more equipment, and more investment, thereby have less utilization. This paper reviewed the development of biomass co-firing technology recent years. This paper elaborated the problems in biomass co-firing process. Based on the investigation, discussed the development of biomass co-firing technology.