糠醛渣的上吸式气化反应过程研究

STUDY ON UPDRAFT GASIFICATION PROCESS OF FURFURAL RESIDUE

以糠醛生产残渣的资源化转化为目的,利用多个实验台和分析仪器对其上吸式气化反应过程开展系统研究。糠醛渣挥发分的析出主要集中于250~350℃,500℃低温下就可完成焦炭的氧化;焦油产物主要包括糠醛、酚类和左旋葡聚糖等,其中左旋葡聚糖占焦油总生成量的29%;原料中较高含量的硫主要在250~500℃范围内以SO2的形态析出;气化灰渣在800℃以上观察到进一步失重,950℃以上出现明显的相变吸热,同时观察到结渣现象;基于糠醛渣转化温度低、易结渣等特点,针对性设计床层参数,并研究空气流量和床层高度的影响规律,实现糠醛渣向可燃气体的连续稳定转化。

For the sake of energy recovery from furfural residue(FR),experiments of its updraft gasification process were carried out on different reactors and instruments.The volatile in FR releases in the range of 250-350℃,and a complete oxidation of char can be achieved at around 500℃.The tar produced mainly consists of furfural,phenols and levoglucosan,in which levoglucosan accounts for 29%.The sulfur in FR is mainly released in the form of SO2 in the temperature range of 250-500℃.The ash starts to transfer at 800℃,and decalescence increases rapidly at 950℃.Ash slagging was observed.Considering the low conversion temperature and easy slagging properties of FR,the parameters of the fixed-bed gasification process was particularly designed,and gasification tests were carried out under different air flow rates and bed heights.A continuous and stable conversion of FR into syngas was realized.