关键词: 秸秆, 炭化, 工业分析, 热值, 模型

Abstract: In order to effectively predict the caloric value of straw biochar, this paper selected 5 kinds of crop stalks including cotton, wheat, corn, rape and rice. After crushing, drying and carbonization treatment, 175 straw biochar samples were obtained. And the ash content, volatile matter, fixed carbon and gross calorific value were measured by standard methods. On the basis of correlation analysis between carbonization technology, industrial components and calorific value, a prediction model of straw biochar calorific value was constructed by regression approach. The results showed that the carbonization temperature had the most obvious influence on the gross calorific value, and holding time and heating rate had little influence on the gross calorific value. Through variance test analysis, the fitting equations of calorific value proposed on the basis of industrial analysis were significant. And the fitting equations of calorific value based on ash content, ash content and volatile matter, volatile matter and fixed carbon, ash content and fixed carbon had achieved good prediction accuracy.

Key words: straw, carbonization, industrial analysis, calorific value, model