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煤泥烘干机的传热边界调节情况!

2019-04-12 来源:http://www.zhongyanjixie.com 发布人:admin 浏览量:
  如今的煤泥烘干机,用处非常大,那些煤矿都用这种设备,使煤泥再次变废为宝。通常呢,煤泥烘干机加热物料内部遍地的温度趋于稳定散布状况,称为热平衡进程。从理论让说,热平衡状况曲线及到达热平衡所需时刻能够经过求解热传导方程而得。
  Today's slime dryers are very useful. Those coal mines use this kind of equipment to make the slime become a treasure again. Usually, the temperature inside the material heated by the slime dryer tends to spread steadily, which is called the heat balance process. Theoretically, the heat balance curve and the time needed to reach the heat balance can be obtained by solving the heat conduction equation.
  热平衡方程解的详细方式,将联系传热鸿沟调理:
  Detailed solutions of the heat balance equation will be related to heat transfer gap regulation.
  (1)物料周界的温度;
  (1) The temperature of material boundary;
  (2)物料周界的暖流强度;
  (2) Warm current intensity around material boundary;
  (3)物料周围界面邻近对流环境状况等才干得出。
  (3) The condition of convective environment near the interface of material can be obtained.
  即便在假定煤泥烘干机内物料是均匀状况下,但在物料周界面上因为散热缘由,它的温度将低于物料内层温度,并以其中间温度高,而且其温度梯度方向由内指向外,与惯例热介质加热物料的状况彻底相反。理论与实习查验是相吻合的,此例极好的证明了煤泥烘干机的枯燥特性。
真空烘干机厂家
  Even if the material in the slime dryer is assumed to be uniform, its temperature will be lower than that in the inner layer of the material due to heat dissipation at the material periphery interface, and the middle temperature is the highest, and its temperature gradient direction is from inside to outside, which is completely contrary to the conventional situation of heating material with thermal medium. The theory coincides with the practice check. This example proves the drying characteristics of the slime dryer very well.
  通常工程设计中常遇到加热物料所需输入功率数值预算,要联系热平衡方程给出以下成果:加热物料所需的热量通常应包含物料恒升热和去湿热两部分。从理论上说,若用加热器单纯用于脱水行将1千瓦功率在1小时内能使初始温度为20℃的水化为蒸汽的质量1.4kg,实际上加热脱水进程中能量有丢失,因而每千瓦小时热能的脱水率要比上述数值小些。
  Generally, the numerical budget of input power for heating materials is often encountered in engineering design. The following results should be obtained in connection with the heat balance equation: the heat required for heating materials usually includes two parts: constant heating and dehumidification. In theory, if the heater is used only for dehydration, the initial temperature of 20 C can be converted into steam with a power of 1 kilowatt in one hour. In fact, the energy is lost in the process of heating and dehydration, so the dehydration rate of heat energy per kilowatt hour is smaller than the above value.
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