摘要
太阳能控温的厌氧发酵具有广阔的应用前景,目前国内外已有研究主要集中在太阳能控温湿发酵过程,尚没有太阳能控温的厌氧干发酵过程研究,为此搭建两套太阳能控温的干/湿厌氧发酵系统,在实际工况下进行批式厌氧发酵,研究太阳能控温下干/湿厌氧发酵启动情况,升温速率,温度波动性,发酵罐热负荷和典型天气下系统内各温度的变化情况。试验结果表明:在太阳辐射为1.2~21.6 MJ/m 2,平均环境温度变化范围为15.2℃~27.5℃的情况下,全玻璃真空管太阳能集热器能够确保干/湿发酵罐正常启动并维持干/湿发酵料液温度37℃±1℃恒温发酵,启动阶段湿发酵罐平均温度一直比干发酵高,温差最高可达2.5℃。增温过程中湿发酵罐平均散热损失比干发酵高0.14~0.27 MJ/d;而在控温阶段当系统经历连续阴雨天时,发酵温度波动不超过1.5℃,说明真空管太阳能集热器控温能力较强,可以满足发酵罐恒温发酵所需热量。
Solar temperature-controlled anaerobic fermentation has broad application prospects.At present,domestic and foreign researches have mainly focused on solar temperature-controlled wet fermentation process.There is no solar temperature-controlled anaerobic dry fermentation process.For this purpose,two sets of solar control a warm dry/wet anaerobic fermentation system,batch anaerobic fermentation was carried out under actual working conditions,the experimental study of the dry/wet anaerobic fermentation start-up,temperature rise rate,temperature fluctuation,and heat load of the fermentor under the solar temperature control and the temperature changes in the system under typical weather.The test results show that:when the solar radiation is 1.2~21.6 MJ/m 2 and the average ambient temperature varies from 15.2℃to 27.5℃,the all-glass evacuated tube solar collector can ensure the normal start-up of dry/wet fermentation tanks and maintain dry/wet fermentation.The temperature of the feed liquid is 37℃±1℃constant temperature fermentation.The average temperature of the wet fermentation tank during the start-up period is always higher than that of dry fermentation,and the temperature difference can be up to 2.5℃.The average heat dissipation loss of the wet fermentation tank is 0.14~0.27 MJ/d higher than that of the dry fermentation during the temperature increase process;when the system undergoes continuous rainy days during the temperature control stage,the fermentation temperature fluctuation does not exceed 1.5℃,indicating the temperature control ability of the vacuum tube solar collector strong,can meet the heat required for constant temperature fermentation in the fermentor.
作者
李金平
轩坤阳
龚纾源
黄娟娟
王春龙
Li Jinping;Xuan Kunyang;Gong Shuyuan;Huang Juanjuan;Wang Chunlong(Western China Energy&Environment Research Center,Lanzhou University of Technology,Lanzhou,730050,China;Key Laboratory of Complementary Energy System of Biomass and Solar Energy,Lanzhou,730050,China;China Northwestern Collaborative Innovation Center of Low-carbon Urbanization Technologies,Lanzhou,730050,China;College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,730050,China)
出处
《中国农机化学报》
北大核心
2020年第11期124-130,共7页
Journal of Chinese Agricultural Mechanization
基金
国家自然科学基金项目(51676094)
国家重点研发计划课题(2018YFB0905104)
兰州市人才创新创业项目(2017—RC—34)
甘肃省高等学校科技成果转化项目(2018D—04)
兰州理工大学红柳一流学科方向项目(0807J1)。
关键词
太阳能控温
干湿发酵对比
升温速率
热负荷
控温能力
solar energy temperature control
comparison of dry and wet fermentation
heating rate
heat load
temperature control capacity
