电站燃煤锅炉掺烧生物质技术

中国未来很长一段时期内仍将以燃煤发电为主。采用生物质与煤混合燃烧技术,即可以达到经济上的合理性,又可以降低锅炉排放物的浓度。目前混燃技术大体上可分为以下三种形式:直接混燃、平行混燃、和间接混燃。前两种混燃方式设备改造成本低,技术成熟,在欧美已经有广泛运用。而作为间接混燃的生物质气化方式除具有CO_2零排放、低硫、低氮等常规生物质燃料的优点外,还具有生物质燃料适用范围广、可以脱除生物质燃料中大部分的碱金属和氯元素、降低煤的燃烧过程中的NOx排放的优点。这种方式可以应用于现有不同容量电站燃煤锅炉,并且对现有锅炉改动甚小,运行灵活性高。我国生物质资源巨大,因此研发产气量大、热值高的大型生物质气化炉是高效利用生物质资源的有效途径。

Technology of Biomass Cofiring in Coal Boiler of Power Station

In China,coal-fired power plants will still play a major role for a long time in the future.The adoption of co-firing biomass with coal can make achievements of economic rationality and boiler exhaust concentration reduction.At present,co-firing technology can be divided into three categories:the direct,the parallel and the indirect co-firing technology.The first two methods have advantages of low technological upgrading cost and mature techniques and are operated in Europe and North America widely.The indi...