无管板列管式换热器的结构及传热研究

Investigation of configuration and heat transfer of pipe-array heat exchanger without fixing plates

针对列管式换热器壳程传热膜系数较低、高流速时易产生流体诱发振动、管板与换热管之间存在间隙腐蚀的实际情况,提出了一种无管板列管式换热器结构.该结构提高了壳程的传热膜系数,解决了间隙腐蚀的问题,减小了壳程流体的流动阻力和流体诱发振动,为列管式换热器的结构改造提供了好的形式.

Aimed at several unfavorable conditions in pipe-array heat exchanger such as less coefficient of heat transfer film in exchanger's shell,fluid-induced vibration due to high-speed fluid flow,and gap erosion between fixing plates and pipes,a kind of configuration of pipe-array heat exchanger without fixing plates was presented.Using this configuration,the coefficient of heat transfer film was increased,gap erosion was eliminated,and flow resistance in exchanger's shell as well as fluid-induced vibration was decreased,so that providing a good exchanger's configuration for reconstruction of pipe-array heat exchanger.