甜高粱茎秆固态发酵制取燃料乙醇中试项目能耗分析  

Energy consumption analysis on pilot-scale plant of fuel ethanol production from sweet sorghum stalk by solid state fermentation

作　　者：梅晓岩[1,2] 刘荣厚[1] 曹卫星[1] 

机构地区：[1]上海交通大学农业与生物学院生物质能工程研究中心,上海200240 [2]辽宁农业管理干部学院,沈阳110161

出　　处：《农业工程学报》2012年第4期194-198,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家高技术研究发展计划(863计划)课题(2009AA05Z436);辽宁省自然科学基金课题(20092031)。

摘　　要：对以甜高粱茎秆为原料燃料乙醇中试项目的工艺进行了描述,对乙醇及副产品生产进行了能耗分析。该项目采用固态发酵工艺,乙醇转化率达到理论值的95.8%,并对剩余的茎秆渣进行综合利用,实现了余热回收利用,具有低排放的环保特性。项目年产无水乙醇1000t/a、发酵秸秆蛋白饲料1500t/a和秸秆纤维纸浆5000t/a。能耗分析表明,在考虑余热回收情况下,系统全年生产总能耗为4.31×106kW·h/a,无水乙醇的单位生产能耗为2759.67kW·h/t,蛋白饲料的单位生产能耗为36.86kW·h/t,秸秆纤维纸浆的单位生产能耗为298.41kW·h/t。无水乙醇生产工艺中回收余热量8.9×105kW·h/a。该系统中乙醇生产能量回收率为62.9%,高于以玉米等粮食原料生产乙醇的能量回收率。The technological process of a pilot-scale plant for fuel ethanol production from sweet sorghum stalk by solid state fermentation was described and energy consumptions of ethanol and byproduct production processes were analyzed. By applying the technology of solid-state fermentation, the conversion rate of ethanol reached 95.8% of the theoretical value. In addition, by utilizing the stalk bagasse comprehensively, the recycling and reusing of the waste heat was realized. As a result, the conversion process had an environment friendly characteristics. The annual yields of the anhydrous ethanol, protein feed and fiber pulp from the stalk were 1 000 t/a, 1 500 t/a and 5 000 t/a, respectively. Result showed that the total energy consumption of the pilot-scale plant was 4.31×106kW·h/a when waste heat recovering was considered. The energy consumptions per unit production of anhydrous ethanol, protein feed and fiber pulp were 2759.67 kW·h /t, 36.86 kW·h /t, and 298.41 kW·h/t, respectively. The recovered waste heat in anhydrous ethanol production process was 8.9×105 kW·h/a. The energy recovering rate during ethanol production from sweet sorghum stalk was 62.9%, which was higher than that of ethanol production from food materials such as corn.

关 键 词：秸秆 燃料 乙醇 甜高粱 能耗分析 固态发酵 

分 类 号：S216.2[农业科学—农业机械化工程]