煤与牛粪生物质混合成型的研究

Compound briquetting of coal and cow dung

为了解决牛粪的利用问题,利用牛粪自有的木质素、纤维素、半纤维素等的黏结作用,将牛粪与煤经过中低压型煤成型机压制成型。研究了黏结剂与原料性质对生物质型煤强度的影响。结果表明:随着黏结剂添加量的增加,型煤强度逐渐增加,当黏结剂添加量超过10%时,型煤强度增加幅度逐渐变缓,黏结剂添加量不宜超过15%;随着无机黏结剂配比的增加,型煤强度先快速增大后缓慢降低,当黏结剂配比为5%有机黏结剂+6%无机黏结剂时,型煤强度最高;随着煤样粒度的减小,牛粪湿度的增加,型煤强度逐渐增加。最后分析了牛粪添加量对型煤燃烧性能的影响,说明生物质添加量越多,型煤初期燃烧速度越快,生物质添加量由20%增加到80%时,型煤燃烧速度变化不大。

The lignin, cellulose and hemicellulose in cow dung have better bonding property, which provide favorable conditions for the compound briquetting of coal and cow dung with moderate and low pressure forming machine. Analyse the influence of binder and raw materials properties on briquette strength. With the increase of additive amount of binder, the briquette strengthen gradually enhance, while the additive amount exceed 10 percent, the strength slowly increase ,so the additive amount shouldn＇t be more than 15 percent. With the increase of inorganic, the strength first remarkably increase, then slowly decrease. The strength reaches the highest when adding 5 percent organic binder and 6 percent inorganic binder. As particle size of coal sample reduce and moisture of cow dung increase, the strength is gradually enhanced. The more additive amount of biomass, the faster burning rate of briquette in the early combustion stage. The combustion velocity changes little while the additive amount of biomass ranges from 20 percent to 80 percent.