改性稻壳作为型煤黏结剂的研究

Utilization of denatured rice husk as briquette binder

以改性稻壳为黏结剂制备的生物质型煤为研究对象,进行了NaOH质量分数、加热温度、加热时间和改性稻壳添加量对型煤抗压强度和跌落强度影响的单因素试验和正交试验。单因素试验表明:当NaOH质量分数为2%,加热温度为85℃,加热时间为2.0 h,改性稻壳添加量为15%时,型煤机械强度较好。正交试验表明:改性稻壳添加量是影响型煤抗压强度和跌落强度的主要因素,其次为NaOH质量分数、加热温度、加热时间;当NaOH质量分数为3%,加热温度为90℃,加热时间为2.0 h,改性稻壳添加量为15%时,生物质型煤机械强度最好,其抗压强度为1426.5 N/个,跌落强度为97.8%。

The denatured rice husk is used as briquette binder to prepare bio-briquette. In order to investigate the influence of concent ration of NaOH solution, heat-treatment temperature and time, modified rice husk quantity on compression resistance and drop strength of briquette, conduct single factor experiment and orthogonal experiment. The single factor experiment show that, the mechanical strength reaches the highest when the concent ration of NaOH solution is 2 percent, heat-treatment temperature and time is 85 ~C and 2. 0 h, additive amount of denatured rice husk is 15 percent. Through orthogonal experiment, when the value of the ablve influencing factors respectively is 3 percent,90 ~C ,2. 0 h and 15 percent, the mechanical strength gets the highest, the compression resistance is 1426.5 Newton per sample and the drop strength is 97. 8 percent. The most important factor in mechanical strength is the additive amount of denatured rice husk.