地上式沼气罐罐壁热负荷分析及工程运行  

WALL THERMAL LOAD ANALYSIS AND ENGINEERING OPERATION OF GROUND TYPE BIOGAS TANK

作　　者：罗涛[1,2] 孟曦[2] 龙恩深[1,2] 梅自力[1] 郭旭晶[1] 

机构地区：[1]农业部沼气科学研究所,成都610041 [2]四川大学建筑与环境学院,成都610065

出　　处：《太阳能学报》2017年第8期2069-2076,共8页Acta Energiae Solaris Sinica

基　　金：国家科技支撑计划(2015BAD21B03);中国农业科学院科技创新工程;四川省科技计划(15ZC1450);农村能源综合建设项目(J576)

摘　　要：分析罐壁的传热机理,提出一种负荷计算模型;以进料为600 kg/d、总固体质量含量(TS)为6%的50 m3无增温发酵罐为验证对象,监测发酵液和环境温度,对比现有和提出模型。结果表明:现有模型显示发酵液几乎为放热,与试验现象不符,总负荷为700.48 MJ,温度偏差为3.3℃,误差较大;提出模型显示先吸后放热,符合试验现象,总负荷为-53.84 MJ,与实际值(0)的偏差为现有模型的7.69%,温度偏差为0.2℃,在控制范围内;工程分析认为,冬季全部粪污混合发酵,净产能为-336.29 MJ/d,提升进料浓度,可降低增温负荷。The heat transfer mechanism of the tank wall was analyzed, and the calculating model of thermal load was proposed. With a feed rate of 600 kg/d and total solid mass content （TS） of 6%, the 50 m^3 no calescence temperature fermentation tank was used as the validation object, surveying the fermentation broth temperature and ambient temperature, comparing the existing and proposed models. The results show that the existing model shows that the fermentation broth is almost exothermic which does not agree with experimental phenomenon, the total load is 700.48 MJ, the temperature deviation is 3.3℃, the error is larger; the proposed model shows that sucking heat firstly, then releasing heat, which agrees with the test phenomenon, the total load of-53.84 MJ, and the error with actual value is 7.69% of the existing model, the temperature deviation is 0.2℃ which is in the control range ; the engineering analysis thinks that net production capacity of all fecal mixed fermentation in the winter is- 356.29 M J/d, increasing feed concentration can reduce the calescence load.

关 键 词：生物反应器 综合温度 太阳辐射 模型 工程实例 

分 类 号：S216.4[农业科学—农业机械化工程]