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Reduced pressure distillation device and process for continuous desalting of crude glycerine

A distillation device and crude glycerin technology, applied in the chemical industry, can solve the problems of difficult separation and refining process, complex components, high viscosity, etc., and achieve the effect of simple process, improved purity and increased added value

Pending Publication Date: 2020-11-20
赵汇川
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, biodiesel obtained by acid, alkali or enzyme catalysis process is obtained after simple separation; besides glycerin, it also contains water, organic salt, inorganic salt, soap, methanol or ethanol, pigment and trace catalyst and glycerin Impurity components such as esters, complex components, and glycerin itself has a high viscosity, high boiling point, and is a heat-sensitive substance, making its separation and purification process more difficult

Method used

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  • Reduced pressure distillation device and process for continuous desalting of crude glycerine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A vacuum distillation device for continuous desalination of crude glycerin, including a crude glycerin storage tank 1, a falling film heater 2, a distillation tower 3, a glycerin desalination circulation device 4 and a glycerin cooling device;

[0047] The crude glycerin storage tank 1 is connected with the input end of the falling film heater 2, and the output end of the falling film heater 2 is connected with the bottom of the distillation tower 3;

[0048] The bottom end of the lower part of the distillation tower 3 is connected with the glycerin desalination circulation device 4, and the middle part of the distillation tower 3 is connected with the glycerol cooling device.

[0049] In one embodiment, it also includes: a glycerin pretreatment device 7, and the glycerol pretreatment device 7 includes: a glycerol pre-fraction cooler 71, a third temporary storage tank 72 and a glycerin pre-fraction storage tank 74;

[0050] The input end of the glycerol pre-fraction is ...

Embodiment 2

[0068] The vacuum distillation device for the continuous desalination of crude glycerol in this example is the same as that in Example 1.

[0069] Adopting said device to carry out the vacuum distillation process of continuous desalting of crude glycerin, comprises the following steps:

[0070] (1) Open the vacuum system and pipeline until the vacuum degree in the distillation tower 3 is 30-60Pa; the crude glycerin in the crude glycerin storage tank 1 enters the falling film heater 2 through a pipeline and is heated to 160° C. to obtain a glycerol gas mixture;

[0071] (2) The glycerol gas mixture enters the lower part of the distillation tower 3 through the pipeline, and enters the first desalination filter tank 41 or the second desalination filter tank 42 through the circulation pump 44 to filter out impurities such as a large amount of salt in the crude glycerin, and then enters the ascending membrane In the reboiler 43 and the temperature is controlled at 160°C, the crude ...

Embodiment 3

[0077] The vacuum distillation device for the continuous desalination of crude glycerol in this example is the same as that in Example 1.

[0078] Adopting said device to carry out the vacuum distillation process of continuous desalting of crude glycerin, comprises the following steps:

[0079] (1) Open the vacuum system and pipeline until the vacuum degree in the distillation tower 3 is 30-60Pa; the crude glycerin in the crude glycerin storage tank 1 enters the falling film heater 2 through a pipeline and is heated to 180° C. to obtain a glycerol gas mixture;

[0080] (2) The glycerol gas mixture enters the lower part of the distillation tower 3 through the pipeline, and enters the first desalination filter tank 41 or the second desalination filter tank 42 through the circulation pump 44 to filter out impurities such as a large amount of salt in the crude glycerin, and then enters the ascending membrane In the reboiler 43 and the temperature is controlled at 180°C, the crude ...

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Abstract

The invention discloses a reduced pressure distillation device for continuous desalting of crude glycerine. The reduced pressure distillation device comprises a crude glycerine storage tank, a fallingfilm heater, a distillation tower, a glycerine desalting circulating device and a glycerine cooling device; the crude glycerol storage tank is connected with the input end of the falling film heater,and the output end of the falling film heater is connected with the lower part of the distillation tower; the bottom end of the distillation tower is connected with the glycerol desalination circulating device; and the middle of the distillation tower is connected with the glycerol cooling device. According to the invention, by arranging the glycerol desalination circulating device, the crude glycerol is filtered, and a large amount of salt and other impurities in the crude glycerol can be filtered through circulating filtration, so that the purity of the product is further improved; the falling film heater and the glycerol cooling device are arranged, so that the temperature of crude glycerol and refined glycerol can be controlled as required, and the yield of the product is further improved; and the energy consumption in the production process is reduced through the whole device, and the production efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a vacuum distillation device and process for continuous desalination of crude glycerin. Background technique [0002] In today's world, with the increasing demand for alternative clean and renewable fuels, the technology of using biomass to produce biodiesel has been widely promoted. The performance of biodiesel is quite close to that of fossil fuel diesel, and it is also one of the most promising alternative energy sources. For example, the Brazilian government has mandated that fuel sellers add 2% biodiesel to diesel fuel since January 2008. By May 2014, the proportion of biodiesel added will be increased to 6%, and the proportion will continue to increase. This has greatly stimulated the production of biodiesel. According to the report of "Oil World" in Hamburg, Germany, the production of biodiesel reached 32.8 million tons in 2016, a surge of 11% year-on-year. [...

Claims

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Application Information

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IPC IPC(8): B01D3/10C07C29/80C07C31/22
CPCB01D3/10C07C29/80C07C31/225Y02A20/124
Inventor 赵敏仲王子腾
Owner 赵汇川
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