The preheater is mainly composed by the cyclone, air duct, blanking articulated chute, wind blockage vale, material scatters, hanger for the inner cylinder and other components. The main function of the preheater is to make full use of the waste heat of the exhaust gas discharging from the rotary kiln and the decomposing furnace to heat the raw materials so that the waste heat of the raw material and some carbonate decompose. In order to maximize the heat transfer efficiency between the gas and solid and achieve the high quality, yield and low consumption of the entire calcining system, the preheater must have three functions of even gas solid dispersion, quick heat transfer and high efficient separation. The preheater can make full use of the heat of the exhaust gas at the end of the boiler to heat the air needed by the fuel. There are several advantages after the boiler is equipped with the preheater. First, the preheater can reduce the temperature of the exhaust so that the fuel can burn quickly in the furnace and the combustion is strong and complete. The preheater can improve the efficiency of the boiler and save the fuel so that it can reduce the loss caused by the incomplete mechanical and chemical combustion of the fuel. Second, the preheater can improve the fuel ignition and combustion conditions. Third, the preheater can save the metal and reduce the cost. Fourth, the preheater can improve the working conditions of the fan.
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The preheater produced by Henan Hongxing Mining Machinery Co., Ltd. can be used to improve the heat exchange performance of the boiler and reduce the energy consumption. This kind of preheater has the following advantages.
First, the preheater has compact structure and the density of the heat transfer surface is high.
Second, the preheater has light weight, which can save steel.
Third, the layout of the preheater is flexible.
Fourth, when the heating surface corrodes, the amount of air leakage will not increase.
Fifth, the structure of the preheater is simple. In addition, the operation and maintenance is easy.