Vertical falling film porous jetting type liquid distribution device, liquid distribution method and application

Abstract

The invention discloses a vertical falling film porous jetting type liquid distribution device which comprises a heat exchange tube and a tube plate connected with the heat exchange tube; a film distributor is arranged above the heat exchange tube; the vertical falling film porous jetting type liquid distribution device comprises a liquid distributor and the film distributor under the liquid distributor; the liquid distributor is connected with the tube plate through a support distance bolt; liquid distribution holes are formed on the liquid distributor; the cross section of the film distributor is of circular shape; the upper end of the film distributor has no end cover and the bottom is sealed by an end cover; a plurality of small holes are formed on a same horizontal plane of a pipe wall on the lower end of the film distributor; the diameter of the film distributor is divided into upper, middle and lower diameters which are gradually reduced; the maximal diameter of the upper end ismore than the inner diameter of the heat exchange tube; a gap exists on the minimal diameter part on the bottom and the inner wall of the heat exchange tube. The invention also discloses a liquid distribution method and an application of the film distributor. The film distributor has the characteristics of simple manufacturing, convenience in mounting, and the like. Thus, the efficient liquid distribution method has an extensive application prospect.

Description

technical field [0001] The invention relates to the field of chemical equipment and belongs to the category of heat exchangers, in particular to a liquid distribution device for a high-efficiency falling film evaporator of a polyisobutylene device. Background technique [0002] Polyisobutylene is an important chemical product, and its production and sales have been monopolized by foreign countries for a long time. Heat exchange equipment plays an important role in its production process. It is of extraordinary significance to break the monopoly of foreign production and sales and improve the heat exchange efficiency of heat exchange equipment. [0003] Falling film evaporation is a new type of efficient heat transfer technology, which has the following advantages: [0004] (1) The heat transfer coefficient is high, even if there is a small temperature difference between the evaporated liquid and the heating medium, the heat transfer coefficient is still high; [0005] (2) ...

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Problems solved by technology

[0012] Therefore, the technical problem to be solved by the present invention is to improve the heat exchange efficiency of the evaporator in the production of polyisobutylene, and to provide a vertical evaporator with simple structure, convenient manufacture and installation, good effect of liquid film distribution, high heat transfer efficiency, and not easy to block. Membrane evaporation liquid distribution device

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