Biodiesel oil multiple-grade molecular distillation process and its device

Abstract

The invention discloses biological diesel fuel polymolecular distillation process, comprising the following steps: putting the biological diesel fuel into first grade molecular distillation device, evaporating water and air, putting the distillate into container, then putting the materials without being distilled into second grade distillation device; the putting the materials into container; putting the material without being distilled into gathering tank, or putting them into next grade distillation device; after n grades distilling, putting the valid combination into container, and putting the refuse into gathering tank. The distillation number of steps is between 2 and 6.

Description

technical field

[0001] The invention relates to a biodiesel preparation process and a device thereof, in particular to a biodiesel multistage molecular distillation process and a device thereof. Background technique

[0002] The existing biodiesel distillation process uses still pots or distillation towers to carry out intermittent distillation of biodiesel under reduced pressure and high temperature conditions. The process is mainly to add the crude biodiesel product into the still or distillation tower at one time, relying on the heating at the bottom to make the material evaporate continuously until it cannot continue to evaporate. Due to the long residence time (4-5 hours) and high evaporation temperature (270-290°C) of the material in the still, a large part of the biodiesel is decomposed, polymerized, and oxidized, so that a large amount of effective components cannot be distilled out, and the product There are many entrainments, so the product yield is low; at the sa...

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