Design and experiment of carbon fiber reinforced cement based composite material heating equipment for bulk curing barn

In order to optimize the structural and performance of heating equipments of bulk curing barn, carbon fiber reinforced cement based composite (CFRC) material and recirculating zone staged igniting combustion technology were adopted to design new material heating equipments, which includes a tunnel type stove with disposable feeding coal and a radiator on the structured of 12 diameter 190 mm heating tubes arranged in 4-4-4 three layers of rank. By testing the thermal performance and corrosion resistance, the results indicated that the thermal conductivity of new material stove and radiator were 1.5 and 3.2 times of the common refractory devices respectively, and the overall thermal efficiency of new material heating equipments was increased by 4.5%. Therefore, the heating performance and service life of heating equipments for bulk curing barn were improved significantly. The corrosion resistance of new material heating tube was 5.3 times of the metal (NS steel) tube. The results of tobacco curing experiments showed that the heating and temperature stable performance of the new material heating equipments bulk curing barn were better than that of refractory and metal devices barn. Compared with the bulk barn of refractory and metal equipments, the ratios of superior leaves cured in the barn of new material equipments were increased by 2.6% and 2.3%, and the coal consumption reduced by 8.5% and 13.2% respectively. The effect of energy saving for tobacco curing is significant.