一、当今粮食烘干热源发展动向国外粮食烘干主要采用油及液化气。我国油及液化气缺乏,历来主要用无烟煤直火烘干。60年代中期,因发现无烟煤直火烘干粮食有致癌污染,因此引起粮食烘干界对能源的重视与研究,许多单位采取了无污染的间接加热方式,但投资高,热效率低,钢材消耗多。于1979年全国烘干学术会议上,我所提出采用烟煤气化达到燃烧较完全的热煤气 First, the development trend of today’s grain drying heat Source of foreign food drying mainly oil and liquefied petroleum gas. China’s lack of oil and gas, has always been mainly used anthracite direct fire drying. In the mid-1960s, anthracite coal was found to be carcinogenic and contaminated by direct-fire drying of foodstuffs. As a result, attention was paid to energy sources in the grain drying field. Many units adopted indirect pollution-free heating methods, but high investment, low thermal efficiency, and high consumption of steel . At the National Drying Symposium in 1979, I proposed using anthracite gasification to achieve more complete combustion of hot gas