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Device for preparing xylitol by integrating evaporation, crystallization and centrifugal separation and control method

A technology of centrifugal separation and control method, which is applied in the direction of crystallization separation, separation method, evaporation separation and crystallization, etc., can solve the problems of large energy consumption, low production efficiency, and low degree of automation, and achieve low energy consumption, high yield, The effect of high degree of automation

Pending Publication Date: 2019-05-17
ZHEJIANG HUAKANG PHARMA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the world's most advanced enterprises, my country's sugar industry still has problems such as low product added value, large energy consumption, backward equipment and technology, low production efficiency, low degree of automation, and insufficient deep processing capacity.

Method used

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  • Device for preparing xylitol by integrating evaporation, crystallization and centrifugal separation and control method
  • Device for preparing xylitol by integrating evaporation, crystallization and centrifugal separation and control method
  • Device for preparing xylitol by integrating evaporation, crystallization and centrifugal separation and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The multi-division system in this embodiment includes two sets of evaporators 5, each with a steaming capacity of 2 tons / hour. 8 vacuum crystallization kettles 6, volume 15m 3 / tower. 2 sets of overhead centrifuges 7, model XG-1250AT. The production capacity of the xylitol crystals of the device in this embodiment is 3 ton / hour to 4 ton / hour.

[0061] The present embodiment device prepares xylitol process and comprises:

[0062] First filter the xylitol exchange liquid, use a 0.45 micron pore size filter element to remove coarse particles, control the pressure difference from 0.1MPa to 0.4MPa, then change to a 0.22 micron pore size filter element for fine filtration, until there is no obvious visible matter to the naked eye. Concentrate by evaporation.

[0063]Turn on the vacuum pump of evaporator 5. After the vacuum degree of evaporator 5 reaches -0.08mpa, turn on the evaporator feed pump and evaporator return valve. 5, adjust the pressure difference and evaporate...

Embodiment 2

[0068] The multiple diversion system in the present embodiment comprises three groups of evaporators 5, each group of steaming water capacity is 3 tons / hour; 14 vacuum crystallization kettles 6, volume 20m 3 / set; 4 top-hanging centrifuges 7, model XG-1250AT. The production capacity of the xylitol crystals of the device in this embodiment is 6 ton / hour to 10 ton / hour.

[0069] The present embodiment device prepares xylitol process and comprises:

[0070] First filter the xylitol exchange liquid, use a 0.45 micron pore size filter element to remove coarse particles, control the pressure difference from 0.1MPa to 0.4MPa, then change to a 0.22 micron pore size filter element for fine filtration, until there is no obvious visible matter to the naked eye. Concentrate by evaporation.

[0071] Turn on the vacuum pump of evaporator 5. After the vacuum degree of evaporator 5 reaches -0.08mpa, turn on the evaporator feed pump and evaporator return valve. 5, adjust the pressure differ...

Embodiment 3

[0076] The xylitol exchange liquid first goes through coarse filtration and fine filtration to remove particulate impurities. During the coarse filtration process, a filter element with a pore size of 0.45 microns is used to filter the exchange liquid, and the pressure difference during filtration is controlled at 0.1MPa to 0.4MPa. The pore size filter element for fine filtration is The 0.22 micron pore size filter element filters the exchange liquid, and the pressure difference during filtration is 0.1MPa~0.4MPa. In this way, it can be ensured that while the large particle crystals are completely filtered during the filtration process, the xylitol mother liquor will not be lost by the filtration process, thereby causing losses.

[0077] Afterwards, the obtained xylitol exchange liquid is detected, and when the light transmittance reaches more than 95% and the pH value is between 5.0 and 7.5, the next step is performed to detect the filtering effect of the xylitol exchange liqu...

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Abstract

The invention relates to a device for preparing xylitol by integrating evaporation, crystallization and centrifugal separation. The device comprises a xylitol tank, a cleaning liquid tank, a recyclingtank and a multiple shunting system, wherein the multiple shunting system comprises J groups of evaporators for evaporation and concentration, K groups of vacuum crystallization kettles for vacuum crystallization and L groups of centrifugal machines for centrifugal separation; J is larger than or equal to 2 and less than or equal to 6; K is larger than or equal to 6 and less or equal to 12; L islarger than or equal to 2 and less than or equal to 4; the evaporators, the vacuum crystallization kettles and the centrifugal machines in different groups are respectively in series connection through pipelines and valves in sequence; switching and control for a series-connection mode and a parallel-connection mode of xylitol exchange fluid in the multiple shunting system are realized by controlling on / off of each valve, so that the effects of evaporation, crystallization and separation processes are combined optimally, and yield is increased. The invention further discloses a control methodfor the device. The processes and the device are integrated at a high degree, so that integral continuous production of the preparation of the xylitol is realized, low energy consumption and high automation degree are achieved, and raw materials are utilized fully.

Description

technical field [0001] The invention belongs to the technical field of food additive production, and in particular relates to a device and a control method for preparing xylitol by integrating evaporation, crystallization and centrifugal separation. Background technique [0002] Xylitol is a five-carbon sugar alcohol that can be used as a substitute for sucrose. The sweetness of xylitol is comparable to that of sucrose, but its calories are only 60% of that of sucrose. After xylitol enters the blood, it can penetrate into cells without insulin and has a fast metabolism without causing blood sugar to rise. It is the most suitable nutritious sugar substitute for diabetics. In addition, xylitol also has the functions of improving liver function, preventing dental caries and losing weight, and is a special sweetener with nutritional value. These characteristics of xylitol make it widely used in food, medicine, chemical industry and other fields, and also greatly promote the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/18C07C29/78
CPCC07C29/78C07C29/76C07C29/80B01D9/0022B01D9/0063C07C31/18A23L27/34A23V2002/00B01D1/26B01D21/262B01D2009/0086
Inventor 杨健郑毅张桃刚高晗李勉柳志强郑裕国毛宝兴张晓健樊炜炜
Owner ZHEJIANG HUAKANG PHARMA
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