带有固液分离的回热回质装置性能试验

Performance Test of Heat and Mass Regeneration Apparatus with Solid-Liquid Separation

为了解决沼气工程冬季热损较大、发酵温度过低和产气量下降的问题,研究系统分析了沼气工程全年热能损耗,并研发了一种带有固液分离的回热回质装置,最后通过试验测试了不同温度下装置的增温效果。结果表明:发酵罐在采取良好保温措施的条件下,出料热量损失占厌氧发酵系统总热量损失的89.3%~93.2%。在环境温度为18℃的条件下,通过回热回质可将16.2℃的进料加热至26.6℃,回收的沼液余热占恒温发酵所需热量的51.9%。在环境温度为0℃的条件下,通过回热回质可将2.5℃的进料加热至18.9℃,回收的沼液余热占恒温发酵所需热量的47.2%。其余热量由14组太阳能集热器组成的集热阵列供热,可以保证沼气工程在冬季37℃恒温发酵。该系统具有良好的经济效益和环境效益。

In order to solve the problem of high heat loss,low fermentation temperature and decreased gas production in biogas engineering in winter,this paper systematically analyzed the annual thermal energy loss of biogas engineering,and developed a heat and mass regeneration apparatus with solid-liquid separation,and finally tested the warming effect of the apparatus at different temperatures.The results show that under the condition of good heat preservation,the discharging heat loss of the fermentation cylinder accounts for 89.3%-93.2%of the total of anaerobic fermentation system.At an environment temperature of 18℃,the feed of 16.2℃can be heated to 26.6℃by heat and mass regeneration,and the regenerative waste heat of the biogas accounts for 51.9%of the heat required for the homothermal fermentation.At an environment temperature of 0℃,the feed of 2.5℃can be heated to 18.9℃by heat and mass regeneration,and the regenerative waste heat of the biogas accounts for 47.2%of the heat required for the homothermal fermentation.The remaining heat is provided by a heating array made up of 14 solar collectors,which guarantees the 37℃homothermal fermentation of biogas project in winter and provides satisfactory economic and environmental benefits.