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以生物质水蒸气气化制取燃气和富氢气体为研究对象,利用Aspen Plus软件建立其过程仿真模型并进行验证。研究气化温度、气化压力、水蒸气与生物质配比(S/B)对气化气成分、高位发热量、值及系统能量效率、效率的影响,并对比有、无热量回收两种情况下的能量利用效率。研究结果表明:较低的气化温度、S/B及较高的气化压力可提高气化气热值,有利于制取燃气;适中的温度(750~850℃)、常压和较高的S/B有利于制取富H_2气体,但S/B的增大会显著降低系统能量效率和效率,故S/B不宜超过1.3;系统的能量效率高于对应的效率,热量回收对于提高系统能量效率和效率有重要作用。
Gasification and hydrogen-rich gas production from biomass steam gasification were studied. The process simulation model was established by Aspen Plus software and verified. The effects of gasification temperature, gasification pressure, water vapor and biomass ratio (S / B) on the composition of gasification gas, high caloric value, high value and system energy efficiency and efficiency were studied. The case of energy efficiency. The results show that the lower gasification temperature, S / B and higher gasification pressure can increase the calorific value of gasification gas, which is beneficial to gas production. The moderate temperature (750-850 ℃), atmospheric pressure and high S / B is beneficial to the production of H2-rich gas, but the increase of S / B will significantly reduce the system energy efficiency and efficiency, so S / B should not exceed 1.3; the energy efficiency of the system is higher than the corresponding efficiency, Improve system energy efficiency and efficiency have an important role.