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Use of vertical film flash distillation rectifying process in producing bio diesel fuel

A biodiesel and flash distillation technology, which is applied in the field of rectification technology, can solve the problems of low efficiency and large residue generation, and achieve the effects of improving economic benefits, increasing output, and improving thermal efficiency

Inactive Publication Date: 2007-08-01
河南省商丘油脂化学厂
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Problems solved by technology

This still still distills the material, and the residence time of the material in the still is generally more than 30 minutes. At this time, a part of the unsaturated fatty acid methyl ester in the crude methyl ester will be polymerized when the residence time is prolonged at 300 ° C. After polymerization Can not be vaporized, that is, a large amount of residue is produced, which reduces the efficiency

Method used

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  • Use of vertical film flash distillation rectifying process in producing bio diesel fuel

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Embodiment Construction

[0007] The vertical thin film flash rectification tank designed by the inventor (another patent application of the inventor) is used to rectify the crude methyl ester. There is a tower-shaped thin-film evaporator in the vertical thin-film flash rectification kettle. The jacket around the outer wall of the rectification kettle and the thin-film evaporator are all heat-conducting oil. There is a flow limiter on the top of the tower-shaped thin-film evaporator. There are many small holes around the bottom of the restrictor; the crude methyl ester produced by esterification or transesterification is first dehydrated and preheated through the dehydration kettle and preheater, so that the temperature of the crude methyl ester can reach above 160°C , into the rectification tank at a flow rate of 3500L / h, and the working pressure in the rectification tank is 5mmHg / cm 2 , the crude methyl ester is pulled into the vertical film flash rectification kettle by the vacuum in the kettle, and...

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Abstract

The invention relates to a vertical film flash evaporation and distillation device for biodiesel production, which is mainly used for coarse methyl ester distillation. The esterified or transesterified coarse methyl ester erters into dewatering still and preheating device for hydrolysis and preheating, then comes into vertical film flash evaporation and distillation device for gasification; the methyl ester gas is fed into chiller through ester gas inlet under vaccum being 5 mmHg / cm2 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 which is only 3 minutes, 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 a rectification process in biodiesel production. 2. Background technology [0002] At present, in the process of biodiesel production in countries all over the world, horizontal rectification stills are generally used. Even if vertical rectification stills are used, the stills are empty and there is no flash system. For this kind of distillation still, the material stored in the tower kettle is at least 10m 3 Above, the vaporization of the crude methyl ester is heated by the hot oil pipe in the tower kettle, the preheating pipe and the jacket. This still still distills the material, and the residence time of the material in the still is generally more than 30 minutes. At this time, a part of the unsaturated fatty acid methyl ester in the crude methyl ester will be polymerized when the residence time is prolonged at 300 ° C. After polymerization It cannot be vaporized, that is, a large amount of residue is produced, which r...

Claims

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Application Information

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IPC IPC(8): C10G7/00C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 程方丁
Owner 河南省商丘油脂化学厂
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