Abstract:

To clarify the fire combustion characteristics of the pottery jar liquor warehouse, a full-scale experimental platform for the pottery jar liquor warehouse was built to simulate the mouth fire and flowing fire using the Maotai-flavor Baijiu jar with a volume fraction of 53%vol. The flame temperature at the mouth of the pottery altar ranges from approximately 380 ℃ to 550 ℃, and the peak heat radiation flux is approximately 2.5 kW/m². Both the flame temperature and radiant flux of the flowing fire increase significantly as the combustion area increases. Under a 10m² flowing fire, the flame temperature is approximately 400-760 ℃, and the peak value of the thermal radiant flux is 8.2 kW/m². The response conditions of different fire scenarios were simulated by arranging the thermocouple matrix on the ceiling. The results show that the two-point temperature detection and alarm system responded rapidly to 4-10 m² fire, with a response time of approximately 3 to 39 seconds, but failed to detect fires at the mouth of the jar. Besides, the test observed that the collapse of external objects can cause a fire and a brief explosion phenomenon, resulting in a sharp increase in the peak of thermal radiation. The flying combustion droplets will intensify the risk of fire spread. It is recommended to install infrared and other image monitoring detectors in the liquor warehouses. The maximum linear distance between adjacent temperature detectors during installation should not be more than 6 meters to enhance the rapid response to fires in the liquor warehouses. Additionally, the fire isolation should be implemented to reduce the impact of fire spread and thermal radiation on adjacent pottery jars.

Key words: pottery jar liquor warehouse, pottery jar mouth fire, fire combustion characteristics, full-scale, ceiling temperature, thermal radiation, flame temperature