Abstract: In order to solve the problems of slow material heating, long processing time and inadequate killing of pathogens in the current aerobic fermentation equipment, the heating system of high temperature rapid and harmless treatment equipment for livestock and poultry manure was optimized. Through the combination of heat transfer theory analysis and fluid simulation, Fluent software was used to simulate the flow field in different oil channel structures, analyze the flow path, temperature and wall temperature of the thermal oil path, the structure of heat conduction oil channel was optimized, and the composting experiment was carried out. The results showed that in the simulation, by adding baffles to the heat conduction oil channel, the heat conduction oil flow path was increased, the distribution was more uniform, and the heat transfer effect was better. In the composting experiment, the temperature of thermal oil was kept above 100℃ and the temperature difference between inlet and outlet was about 8℃, so the heat transfer was stable, meanwhile, the correctness of the simulation analysis was verified. The materials in the equipment were heated up to 50℃ within two hours and kept above 60℃ for a long time, reaching the temperature required for killing pathogenic bacteria and other compost. The organic matter and nutrient content of the treated materials reached the national organic fertilizer standard.

Key words: livestock and poultry, harmless treatment, heating system, composting experiment

摘要： 针对当前好氧发酵设备在堆肥过程中物料升温慢、处理时间偏长、病原菌杀灭不充分等问题，对畜禽粪污高温快速无害化处理设备的加热系统进行优化设计。通过传热学理论分析和流体仿真相结合的方法，利用Fluent软件对不同油路结构内的流场进行模拟，分析导热油流动轨迹、温度以及油路壁面温度，优化导热油路结构，并开展堆肥试验。结果表明：在仿真模拟中，通过对导热油路添加挡板，导热油流动路程增加，分布更加均匀，传热效果更好；在堆肥试验中，导热油温度保持在100℃以上且进出口温度差在8℃左右，传热效果稳定，同时也验证仿真分析的正确性；设备内物料在两小时内快速升温至50℃，且长时间保持在60℃以上，达到杀灭病原菌等堆肥所需的温度；处理后物料有机质及养分含量达到国家有机肥料标准。

关键词: 畜禽粪污, 无害化处理, 加热系统, 堆肥试验