Vertical film flash distillation rectifying still for producing bio diesel fuel

Abstract

The invention relates to a vertical film flash evaporation and distillation device for biodiesel production, mainly comprising rectifying still and film evaporator. The inside of annular tube around of rectifying still outer wall and inside of film evaporator are filled with heat conductive oil; the top of evaporator is equipped with a current limiter, all- around of bottom of current limiter is equipped with a plurality of eyelets, top of current limiter is connected with coarse methyl ester inlet; the coarse methyl ester enters into current limiter from inlet and flows out through said eyelets to heating wall of film evaporator and gasified instantly because of the high temperature of 300 Deg. C in the heating wall; gasified methyl ester enters into chiller and getting fine methyl ester. The invention is characterized in that it can greatly reduce the retention time for coarse methyl ester in rectifying still, reduces polymerzation; reduces fat consumption by over 10%, the continuous feed is possible and mass production is feasible; the heat carrier can be coal or electricity, heat availability ratio is increased by over 8%, the energy consumption is reduced and industrial benefit is increased.

Description

1. Technical field [0001] The invention relates to rectification equipment in biodiesel production. 2. Background technology [0002] At present, most countries in the world use horizontal rectification stills in rectification to produce biodiesel, and rely on tube preheaters and jackets to heat and vaporize. With this kind of horizontal rectification kettle, there are many and concentrated materials in the tower kettle, which not only affects the vaporization, but also prolongs the residence time of the materials in the kettle. Generally, the materials stay in the kettle for more than 30 minutes, which increases the concentration of unsaturated fatty acid formaldehyde. The generation of ester polymerization reaction increases the distillation raffinate like this, and the product yield decreases, and the general raffinate is about 15%. In addition, even if a vertical kettle is used, the inside of the kettle is empty and there is no flash device system. 3. Contents of the ...

AI Technical Summary

Problems solved by technology

With this kind of horizontal rectification still, there are many and concentrated materials in the tower still, which not only affects the vaporization, but also prolongs the residence time of the materials in the still. Generally, the materials stay in the still for more than 30 minutes, which increases the concentration of unsaturated fatty acid formaldehyde. The generation of ester polymerization, so the distillation raffinate increases, the product yield decreases, and the general raffinate is about 15%

In addition, even if a vertical kettle is used, the inside of the kettle is empty, and there is no flash device system

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