香菇菌棒灭菌乏汽余热回收供热系统性能分析  

Performance analysis of the heat supply system with the waste heat recovery from the sterilization of the mushroom sticks

作　　者：王林成[1,3] 全贞花 赵耀华[1,2] 靖赫然[1] 任海波 杜伯尧 Wang Lincheng;Quan Zhenhua;Zhao Yaohua;Jing Heran;Ren Haibo;Du Boyao(Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology,Beijing University of Technology,Beijing 100124,China;Zibo Boienergy science and technology Co.,Ltd.Zibo 255200,China;School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]北京工业大学绿色建筑环境与节能技术北京市重点实验室,北京100124 [2]淄博博一新能源科技发展有限公司,淄博255220 [3]内蒙古工业大学土木工程学院,呼和浩特010051

出　　处：《农业工程学报》2022年第1期248-257,共10页Transactions of the Chinese Society of Agricultural Engineering

基　　金：内蒙古自治区自然科学基金(2020MS05023)。

摘　　要：香菇菌棒工业化生产灭菌工艺中余热外排浪费严重,同时造成了热污染和乏汽冷凝水无序飘洒等问题。为解决该问题,对灭菌工艺的乏汽和冷凝水进行了余热回收利用系统设计与实际应用,并对工程实测数据进行了分析。研究结果表明,供暖季余热用于香菇菌棒培养棚和厂区办公楼、宿舍楼等建筑的供暖,供水温度范围36~48℃,每日供热量在8~18 GJ之间,非供暖季余热用于燃气锅炉补水的二次加热及生活热水的加热,供水温度范围65~75℃,每日供热量在8~10 GJ。该项目预计节约费用约19.4万元/a,大约3.1 a可以回收投资。减少二氧化碳排放135.6 t/a,减少二氧化硫排放10.35 kg/a,减少二氧化氮排放43.5 kg/a,减少烟尘排放16.57 kg/a,体现了较好的经济效益和环境效益,为小型农业余热回收系统的运行提供参考。Shiitake mushroom has been one of the most edible fungus varieties in China. However, a large amount of the waste heat has been discharged during the industrialized production and sterilization of mushroom sticks, as the cultivation scale develops rapidly in recent years. The waste heat has also posed a serious threat to environmental pollution, even disorderly spilling of exhausted steam condensate during the process. In this study, a new type of heat exchanger with a porous channel was designed for a mushroom production factory in Zibo City, Shandong Province, China. A waste heat recovery system was also proposed to apply for the exhaust steam and condensed water of the sterilization, where the engineering data was measured in practice. The results show that the waste heat in the heating season was used for the heating of cultivation sheds,office buildings, and dormitories in the factory. The temperature range of the water supply was 36-48 ℃, and the daily heat supply was between 8-18 GJ. In non-heating seasons, the waste heat was used for the secondary preheating of the water supply to a gas boiler, or the bathing water. The temperature range of the water supply was 65-75 ℃, and the daily heat supply was 8-10 GJ, where the total heat transfer coefficient of the heat exchanger was about 70-105 W/(m2·K). As such, the efficient recovery of the waste heat was achieved for the exhausted steam wastewater from mushroom sterilization over the entire year.It was estimated that the net saved cost was 194 000 Yuan, the initial investment can be recovered in about 3.1a. Reduce carbon dioxide emissions by 135.6 t/a, reduce sulfur dioxide emissions by 10.35 kg/a, reduce nitrogen dioxide emissions by 43.5 kg/a, and reduce smoke and dust emissions by 16.57 kg/a, reflecting better economic and environmental benefits.Small-scale agricultural waste heat recovery projects should try to use waste heat throughout the year to shorten the payback period. The hot water storage tank can be used in the design to realize the contrad

关 键 词：灭菌 余热利用 农业废物 余热供热 

分 类 号：S210.45[农业科学—农业机械化工程] TU83[农业科学—农业工程]