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蒸发沸腾传热在许多工业和技术领域中的应用非常曾遍

 

研究发现,流化床闪蒸器的竹内观速度为0.10.2时,其传热系数相当于普通换热器观速度为1.8时所能达到的水平,他认为这是山厂固休粒广的引入破坏了流体的边界层所致幻虹⑶等人对流化床换热器进行进步的研究,为7控制固体粒广在宵束中的均匀分布足流化床换热器稳定操作的关键,他对普通换热器进行了改造以适应含有固体粒子时的操作幻肛还指出分布板的设计分布板的压降和延伸管的设计是流化床稳定操作的关键。人们采用了内循环结构,提出了内循环流化床换热器。

Design is the design of distributed operation phantom study found that fluidized bed flash evaporator Takeuchi rate from 0.1 to 0.2, the heat transfer coefficient is equivalent to ordinary for heat exchanger rate is 1.8 can reach the level he thinks this is mountain plant in solid particle wide introduction of destruction of the fluid boundary layer induced by Hong et al. Fluidized bed heat exchanger for progress in the study of 7 control of solid particle widely in night beam of uniform distribution of fluidized bed heat exchanger for stable operation of the key, he of ordinary heat for the transformation to adapt to the containing solid particles of magic anus also pointed out that the distribution in the plate pressure drop and extension tube fluidized bed stable operation of the key. The inner circulation structure was adopted, and the inner circulating fluidized bed heat exchanger was proposed.

流化床换热器无论形式如何变化,都有个共同的特点,即加热管中始终为液固两相,所以上述的流化床换热器只能称为液固流化床换热器。在这类换热器中没有相变产生。当换热器中有相变产生时,该换热器称为蒸发器。蒸发沸腾传热在许多工业和技术领域中的应用非常曾遍。迮蒸发沸腾过程中,代热壁面上的结垢比无相变时严重得多,如何解决蒸发器中传热壁面上的结垢,是长期未能解决的难。

There is a common characteristic in the fluidized bed heat exchanger, which is the liquid solid two phases in the heating pipe, so the fluidized bed heat exchanger can only be called the liquid solid fluidized bed heat exchanger. There is no phase transformation in this kind of heat exchanger(www.ttsao77.com). When there is a phase change in the heat exchanger, the heat exchanger is called the evaporator. Evaporation boiling heat transfer has been applied in many industrial and technical fields. Zhongze evaporation boiling process, on behalf of the thermal wall fouling than the phase transition is much more serious, how to solve the fouling of the evaporator wall heat transfer is to be solved for a long time to.

在沸腾传热系统中加入固体粒子的研究,是从池沸腾传热开始的。将固体粒子加入池沸腾的水,发现固体粒子在加热面处的存在,使汽泡更易跃离壁面。后来此和,证实了在加热壁面处固体粒子以形成了汽体通道,以及壁而上的汽泡和形成的1然对流异致面处的粒+层流化。闶体粒子对池沸腾传热的影响,还有些学者进行了研究,得出了不同的结果。流动沸腾传热比池沸腾传热要复杂衍多,在蒸发器和再沸器中究很少。

In the boiling heat transfer system, the research of solid particles is the starting of the pool boiling heat transfer. The solid particles into the pool boiling water, found that the presence of solid particles in the heating surface, so that the bubble is more likely to jump off the wall surface. Later, it was confirmed that the solid particles in the heated wall were formed by the formation of the vapor passage, and the wall of the bubble and the formation of the 1 natural convection at the surface of the particle + laminar flow. When the particle effect on pool boiling heat transfer, some scholars have studied and obtained different results. Flow boiling heat transfer is more complicated than that of pool boiling heat transfer.

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