A double-effect combined inverted conical graphite falling film evaporator

Abstract

The invention discloses a double-effect combined inverted-cone graphite falling-film evaporator, which belongs to the field of falling-film evaporators. A double-effect combined inverted-conical graphite falling-film evaporator includes a shell whose interior is fixedly connected with The upper plate and the lower plate, the upper plate is located on the upper side of the lower plate, and a plurality of evenly distributed heat exchange tubes are arranged inside the shell, and the upper and lower ends of the heat exchange tubes respectively pass through the upper plate and the lower plate and are fixedly connected to the inside. The present invention can reasonably set the film thickness according to the characteristics of the viscosity and fluidity of the feed liquid, so that the feed liquid can smoothly flow in the form of a film along the inner wall of the heat exchange tube, and ensure that the feed liquid is distributed in the heat exchange tube. Uniformity, which has applicability beyond the reach of existing falling film evaporators, and, by setting up an in-line cleaning column in the liquid separation tank, it solves the difficulty of cleaning the fouling of the material liquid in the heat exchange tube, and realizes simultaneous Efficient cleaning of multiple heat exchange tubes is performed synchronously, with good recycling performance.

Description

technical field [0001] The invention relates to the field of falling film evaporators, in particular to a double-effect combined inverted conical graphite falling film evaporator. Background technique [0002] Falling film evaporation is to add the feed liquid from the upper tube box of the heating chamber of the falling film evaporator, and distribute it evenly into each heat exchange tube through the liquid distribution and film forming device. flow up and down. Due to the good anti-corrosion performance of graphite materials, it is widely used in some high-corrosion industries and fields. Graphite falling film evaporators use steam heating and evaporation. The parts of the equipment that are in contact with corrosive media are made of impregnated graphite, which is chemically stable. Good performance, high evaporation efficiency. [0003] The feed liquid distributor is a key part of the falling film evaporator. The feed liquid enters the feed liquid distributor from the...

AI Technical Summary

Problems solved by technology

When the material liquid cannot evenly wet the inner surface of all the heating tubes, the surface of the lack of liquid or the lack of liquid may be scaled due to evaporation, and the scaled surface in turn blocks the flow of the liquid film, thereby reducing the heat transfer in the adjacent area. Conditions deteriorate further

[0005] Due to the different viscosities and flow properties of different feed liquids, it is necessary to consider the influence of the thickness of the film on the uniform film distribution effect when distributing the film to ensure that it flows smoothly, is not easy to clog and the film is evenly distributed, but the existing graphite reduces the It is difficult for the film evaporator to adjust the thickness of the film, that is, it is necessary to use different types of falling film evaporators for different types of feed liquids. In addition, the treatment of the fouling of the feed liquid in the heat exchange tube of the evaporator is still a big problem

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