【正文】 same time it still has few movement part, accessory equipment, maintenance is simpler, small area is lesser, investment costs lower advantages. Three, suspension preheater the position and function Suspension preheater mainly cyclone preheater and made tube preheater two kinds. Tube preheater has now made tends to eliminated. Pre by cyclone preheater depose kiln as preheating unit equipment. Constitute a cyclone preheater heat transfer unit equipment is mainly a whirlwind tube and tube at various levels between whirlwind of connecting pipeline (also called heat pipe). The main function of suspension preheater is fully utilize rotary kiln and the drain of deposing furnace hot airflow which heat enthalpy heat raw, make preheated and part, and then into carbonate deposition of deposing furnace or rotary kiln, continue the heating deposition burn plete clinker task. So it must have contentious, solid twophase can fully scattered uniform, rapid heat transfer, efficient separation and three functions. Only these three functions, and both of trying to make highlyeffective, can maximize thermal for whole kiln system, high quality, high efficiency, low consumption and stable production create conditions. Cyclone preheater functions to dispersing materials in hot airflow, uniform, gassolid in heat and separation. Its performance quality mainly displays in whether has the high thermal efficiency, low, separation of resistance and good sealing performance to reduce internal and external air leakage, etc. Cyclone preheater is by a whirlwind tube and upper and lower two level a whirlwind cylinder posed the connections between pipeline. Part of the whirlwind canister ontology cylinder, the cone, a pipeline, export pipeline, imported material pipe inner cylinder and etc. Connecting pipe upside and superior a whirlwind tube inlet piping, lower and lower a whirlwind tube outlet piping connections。 whirlwind tube Whirlwind tube in superior under the lower feed tube with heat pipe joint and also has a feeder, the purpose is to make the tube down superior a whirlwind into heat pipe homogenizing powder, because gravity rushed in and splash rise, make the feeder can rapidly dispersing, powder raw edgeunder at a lower level of heat flow whirlwind canister out, improve thermal among. Traced back, as the cyclone preheater whirlwind of the main part in general cone, is the whirlwind dust collector based on reference over the development. Both have in mon is to keep lowpressure loss status has higher gassolid separation efficiency. But differences lies in, cyclone dust collector don39。 Meanwhile airflow a reaction which to dust to dust, this is the resistance of the air. The resistance theoretical analysis and scientific experiments that affect both whirlwind cone fluid resistance and separation efficiency basically has two big factors, a whirlwind of geometric structure is cartridge, the second is a fluid itself physical properties. Because as used in cement industry suspension preheater whirlwind tube, its handling of airflow dusty defined roughly physical properties. Four, the influence of thermal efficiency and the dedusting efficiency factors 4 1, leak air of influence Whirlwind tube as cement suspension preheater deposition process important equipment, its air leakage, whether in the air leakage or air leakage, is harmful. Preheat system directly affects its outside air leakage and increase efficiency, exhaust fan power consumption, and feed tube place in air leakage makes whirlwind canister separation efficiency sharply reduced the fly ash, system, causing an indirect influence ratio increases the preheater system thermal efficiency. In the actual production process, preheater system outside air leakage are easy to spot. To strengthen management, improve operation personnel sense of responsibility, outside air leakage can be controlled. But the next feed tube place within the air leakage, often with operators, experience judgment will not be discovered. Currently used flap valve unloader device, in order to prevent and smooth unloading, often a