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Membrane technology-based refined sugar clear-syrup impurity removal and decoloring technology

A technology for refining sugar and membrane technology, which is applied in the field of refining sugar and clarified syrup removing impurities and decolorization process, can solve the problems of high investment and operation cost, complicated brine post-treatment process, and aggravated sucrose reducing sugar decomposition, etc., and achieves investment cost and operation cost. Low cost, beneficial to crystallization, and the effect of reducing color value

Inactive Publication Date: 2015-03-11
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the shortcoming of ion exchange resin decolorization method is: (1) the residence time of syrup in resin tank is about 30 minutes, can further aggravate the conversion of sucrose and the decomposition of reducing sugar; It is eluted and regenerated with sodium hydroxide, and a large amount of high-salinity brine is produced during the elution process. The post-treatment process of brine is complicated, which requires a lot of investment and operating costs, and has no economic benefits. Direct discharge will cause serious environmental pollution. This is the problem of the environmental protection industry

Method used

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  • Membrane technology-based refined sugar clear-syrup impurity removal and decoloring technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The basic parameters of clarified syrup are as follows:

[0018] Brix °Bx

Simple purity %

Color value IU

Turbidity NTU

Conductivityus / cm

50.3

98.74

469

4.23

115

[0019] The clarified syrup was sampled from the clarified syrup after press filtration, before going to evaporation.

[0020] Transport the clarified syrup to a microfiltration device with a pore size of 0.45 μm, the pressure is 0.15 MPa, the temperature of the clarified syrup is 45 ° C, and the pH of the clarified syrup is 7.2 to obtain a microfiltration concentrate and a microfiltration permeate, and remove the microfiltration concentration liquid, leaving the microfiltration permeate.

[0021] The microfiltration permeate is transported to the ultrafiltration device, the molecular weight cut-off of the first stage ultrafiltration is 10,000 Daltons, the pressure is 1.8MPa, the temperature of the microfiltration permeate is 45°C, and the pH of the microf...

Embodiment 2

[0027] The basic parameters of clarified syrup are as follows:

[0028] Brix °Bx

[0029] The clarified syrup was sampled from the clarified syrup after press filtration, before going to evaporation.

[0030] The clarified syrup is transported to a microfiltration device with a pore size of 0.8 μm, the pressure is 0.10 MPa, the temperature of the clarified syrup is 75 ° C, and the pH of the clarified syrup is 7.8 to obtain a microfiltration concentrate and a microfiltration permeate, and remove the microfiltration concentration liquid, leaving the microfiltration permeate.

[0031] The microfiltration permeate is transported to the ultrafiltration device, the molecular weight cut-off of the first stage ultrafiltration is 10,000 Daltons, the pressure is 1.8MPa, the temperature of the microfiltration permeate is 75°C, and the pH of the microfiltration permeate is 7.8 , recover 75% of the first-stage ultrafiltration permeate, 25% of the first-stage ultrafiltration conc...

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Abstract

The invention discloses a membrane technology-based refined sugar clear-syrup impurity removal and decoloring technology. The technology comprises the following steps of carrying out press filtration on syrup to obtain clear syrup, before evaporation, feeding the clear syrup to a microfiltration device, carrying out microfiltration on the clear syrup by a microfiltration device to obtain a microfiltred concentrate liquid and a microfiltred penetrating liquid, removing the microfiltred concentrate liquid, collecting the microfiltred penetrating liquid, feeding the microfiltred penetrating liquid into a ultrafiltration device, carrying out further condensation treatment on the primary ultrafiltration concentrate liquid, carrying out sterilization to obtain a sugar liquid, and feeding the last ultrafiltration concentrate liquid into follow-up processes of sugar refining. The technology does not produce a waste liquid, is free of a chemical reagent, has no damage to the human body, improves syrup purity, reduces syrup turbidity and is conducive to crystallization.

Description

technical field [0001] The invention belongs to the field of food processing, in particular to a process for removing impurities and decolorizing refined sugar clarified syrup based on membrane technology. Background technique [0002] The production process indicators of refined sugar are higher than those of high-quality white sugar, and the requirements for product quality are also higher. Refined sugar is produced by redissolving, clarifying, decolorizing and crystallizing raw sugar. The conventional production process currently adopted is as follows: raw sugar containing a large amount of non-sugar impurities such as pigment, pectin, starch and phenolic substances is obtained from sugarcane through pressing, primary purification, impurity removal, crystallization and separation steps. The refined sugar factory redissolves the raw sugar, adds lime slurry, fills the flue gas, and utilizes the CO in the flue gas 2 React with lime to produce precipitate, absorb impurities...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/16
CPCC13B20/165
Inventor 杭方学梁欣泉莫增宽陆海勤陆登俊李大成李文徐勇士李凯
Owner GUANGXI UNIV
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