关键词: 烤烟, 密集烘烤, 醇基燃料, 供热设备

Abstract: Coal-fired heating for flue curing tobacco has many negative results including extensive control, low thermal efficiency and environmental pollution, etc. In order to clean energy for tobacco flue-curing, this paper introduced an energy-heating system using alcohol-based liquid fuels for tobacco curing, which was constituted by a modified burner, spindle-shape furnace conjoined radiator, and automatic control instrument. Experimental verification indicated that 2 nozzles  supplying 0.8 gal/h and 2.0 gal/h could provide enough fuel for tobacco curing. Incorporating a centrifugal-type fan of 45 W with opening the burner outlet by 2/3, the best burning result could be achieved. Compared with the traditional heating system of bulk curing barn heating system, the heat efficiency of new device was increased by 80%~82%, higher than that of the conventional using coal. Although the total fuel cost of tobacco curing was 0.64  yuan/kg  than that of the control, the appearance quality of tobacco after curing was improved, and the offensive oral sensation in the middle tobacco leaves was significantly reduced when evaluated by smoking. The new device could automatically and sensitively control the temperature of the loading chamber during the curing process. The precision of temperature control was better than that of the conventional coal barn. Unattended operation could be achieved during the entire curing process.