Shell and tube graphite falling film evaporation heater

Abstract

The invention discloses a shell and tube graphite falling film evaporation heater, which comprises an upper tube box, a graphite liquid distribution device, an upper sealing element, a graphite heat exchange assembly, a lower sealing element and a lower tube box, wherein the upper tube box, the upper sealing element, the graphite heat exchange assembly, the lower sealing element and the lower tube box are sequentially overlapped from top to bottom. The graphite heat exchange assembly comprises more than two graphite heat exchange tubes, a sealing assembly and a tube plate, the sealing assembly is arranged between the graphite heat exchange tubes and the pipe plate in a sealed way, and in addition, the graphite heat exchange tubes are modified phenolic resin profiling graphite tubes. Therefore, the modified phenolic resin profiling graphite tubes are adopted as the graphite heat exchange tubes, the shell and tube graphite heat exchange tubes can be used for the falling film evaporation heater, the defects of the traditional shell and tube graphite heat exchanger are overcome, the use range of the shell and tube graphite heat exchanger is enlarged, the evaporation intensity is high, the heat exchange area is small, and the material circulation quantity is small.

Description

technical field [0001] The invention relates to a graphite falling film evaporation heater, in particular to a tubular graphite falling film evaporator. Background technique [0002] For the evaporation unit operation of materials that are prone to crystallization and fouling, the general graphite shell and tube heat exchanger can only be used for forced circulation or self-circulation evaporation heaters, and cannot be used for falling film evaporation heaters. The main reason is that during operation Temperature changes have a great impact on graphite heat exchange tubes, and once surface crystallization or fouling occurs, it is difficult to deal with. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a tube-and-tube graphite falling-film evaporation heater, which enables the tube-and-tube graphite heat exchanger to be used as a falling-film evaporation heating by changing the production material used in the gr...

AI Technical Summary

Problems solved by technology

[0002] For the evaporation unit operation of materials that are prone to crystallization and fouling, the general graphite shell and tube heat exchanger can only be used for forced circulation or self-circulation evaporation heaters, and cannot be used for falling film evaporation heaters. The main reason is that during operation Temperature changes have a great impact on graphite heat exchange tubes, once surface crystallization or fouling occurs, it is difficult to deal with

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