关键词: 生物燃料, 生产, 粒度, 含水率, 整体比能耗, 模拟

Abstract: In order to select optimal raw material parameters in the straw briquette processing,a straw briquette processing plant in Shaanxi with annual output about 20000 tons was taken as an example. Using the discrete system simulation software ExtendSim,we made a simulation on the straw briquette production and investigated the effects of moisture content and crushing particle size of raw materials on specific energy consumption and productivity of the processing. We obtained the optimal parameters combination of theoretical energy consumption based on the results. Based on the sensitivity analysis,we concluded that energy consumption of briquette fuel was more sensitive to the parameters of raw material than those of its productivity,but the contrary conclusion applied to the pellet fuel. Hence,the optimal parameter selection was based on a performance indicator which was more sensitive to the parameters of raw material. We concluded that as for briquette fuel whose optimal parameters are 15% and 20-30mm,it will save 11.64% energy consumption theoretically and practically saved 10.36%. As for pellet fuel whose optimal parameters are 10% and 10mm,it will save 5.58% theoretically and 6.36% practically. Therefore,the optimal parameter combination chosen by the performance indicator is more energy-saving than the ones from the original parameters optimization experience. It provides a theoretical foundation for the optimal parameter selections in the straw briquette engineering production and helps to guide the engineering practice.

Key words: biofuels, productivity, particle size, moisture content, specific energy consumption, simulation