洁净煤反向燃烧热风炉密集烤烟试验

目的]考虑到空气能和生物质燃料尚不能改变目前烤烟燃料以燃煤为主形势，为实现烘烤供热无需人值班、烤房温度精准调控和节能环保,方法]空载试验和密集烤烟试验相结合优化炉内流动传热燃烧过程，研发一种洁净煤反向燃烧热风炉。结果]装煤通道和清灰通道合并为进口用外炉门密封的操作通道。静压室侧壁缺口用内炉门堵封。正燃无烟煤放置在煤床顶面中心。排烟温度44~77℃，58~63℃稳温阶段炉内负压最大-8~-2 Pa。反烧炉能预装入800个净煤球，能完成约8天烘烤燃烧供热任务；烤房温度变化幅度±0.2℃。反烧炉比金属炉相对节能26.4%、节能993 kg标煤/年台、运行费用节省1750元/年台。反烧炉烟气颗粒物、NOx和SO2排放低于《工业炉窑大气污染物排放标准》(GB 9078—1996)标准。和金属炉对照，反烧炉干烟叶等级结构更优，内在质量略好，外观质量相当，糖碱比更合理、化学成分更协调。结论]研究证实了反烧炉应用于密集烘烤工艺的可行性，为金属炉技术升级改造提供新方案。

Clean-briquette Reverse-combustion Hot-blast Furnace: Intensive Flue-curing Test

Objective] Considering the situation that the air energy and the biomass fuel isn’t yet taken as the main fuel instead of the coal and the target that the tobacco is cured with no duty for heating, the high control precision of chamber temperature, energy saving and environment protection, Method] air flow, heat transfer and combustion process had been optimized inside the furnace through no-load simulation tests and intensive flue-cured tobacco tests, a kind of clean-briquette reverse-combustion hot-blast furnace is developed. Result] The coal-preloading channel and the ash-clearing channel merged into the operation channel whose inlet was sealed by the outer furnace door. The gap in the lateral wall of the static pressure chamber was blocked by the inner furnace door. Several blazing crimson anthracite was placed in the center of coal-bed top to ignite the briquette bed. The exhaust temperature was as low as 44 to 77 degree Centigrade. The maximum negative pressure inside the new furnace reached negative 2 to negative 8 Pascal in the stage of steady temperature 58 to 63 degree Centigrade. The baking heating for about 8 days could be obtained when 800 briquettes were loaded into the furnace one-time and the change range of the baking barn temperature was negative 0.2 to positive 0.2 degree Centigrade. The anti-burning furnace saved 26.4% relatively and 993 kg standard coal and 1750 RMB yuan of operating cost per year per unit compared with the metal furnace. The particle, the nitrogen oxide discharge and the sulfur dioxide discharge from the flue gas was lower than that of Standard for Emission of Air Pollutants in Industrial Furnaces (GB9078-1996). Its grade structure of dry leaf was better and its inner quality slightly better and its appearance quality the same and its rate of sugar to alkali more reasonable and its chemical composition more harmonious. Conclusion] The feasibility that the anti-burning furnace is applied to the intensive flue-cured tobacco process is proved and a new plan is provided for the technical upgrading reconstruction of metal furnace.