螺杆挤压连续汽爆装置预处理秸秆试验研究

摘要

以玉米秸秆为原料，用螺杆挤压连续汽爆装置进行9组试验，考察了浸渍条件、温度和停留时间对汽爆物组分含量的影响。试验结果表明：从半纤维素水解程度以及汽爆物pH，考察不同浸渍条件的浸渍效果排序为预浸渍〉预喷淋浸渍〉直接喷淋；采用螺杆挤压连续汽爆装置处理玉米秸秆，在直接喷淋3％稀H2SO。溶液、温度170℃、停留时间25min的预处理条件下，半纤维素水解成戊糖的效果最好，戊糖得率最高为7．75％。%Corn straw was used in nine group experiment by the device of screw extrusion and continuous steam explosion. The effects of pretreatment previous immersion, temperature and time were analyzed. Study the effects of different impregnation conditions from the degree of hydrolysis of hemicellulose and steam ordnance pH. The order of the effect of impregnation was： Pre-impregnation superior to pre-spray impregnation to direct spray. Using the device of screw extrusion and continuous steam explosion treated corn straw, the best pretreatment condition is spray 3% H2SO4, temperature 170℃ and time 25 min. In this pretreatment condition, the hydrolysis ofhemicellulose was strong, and the component ofpentaglucose was 7.75%.