Refined sugar clarifying method

A technology for refining sugar and syrup, which is applied in the direction of purification using physical methods, sucrose production, sugar production, etc. It can solve the problems of poor clarification effect of re-dissolved syrup and low service life of ion exchange resins, so as to prolong membrane cleaning cycle and clarification effect Good, slow decay effect

Inactive Publication Date: 2015-07-22
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an improved refined sugar clarification method to solve the technical problems of poor clarification effect of re-dissolved syrup and low ion exchange resin life in the traditional refined sugar clarification process

Method used

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Embodiment 1

[0027] A refined sugar clarification method, its operation steps are:

[0028] (1) Honey washing: Put the raw sugar into the top-suspension centrifugal honey separator, use R 4 Molasses cleans the pigment on the surface of raw sugar to obtain honey-washed raw sugar;

[0029] (2) Dissolving sugar: dissolving the honey-washed raw sugar with 85°C washing filter cloth water in a sugar-dissolving box to obtain 65.0°Bx back-dissolving syrup for subsequent use;

[0030] (3) Carbon filling: first pump the remelted syrup to the No. 1 carbon filling tank, and add lime milk and carbon dioxide to the No. The carbon-filled syrup is pumped to the No. 2 carbon-filled tank, and carbon dioxide is continued to be filled into the No. 2 carbon-filled tank to obtain the 2-carbon-filled syrup for use. The alkalinity of the 1-carbon-filled syrup is 0.05 and the pH value is 11.0 , the pH value of the carbon dioxide filling is 8.5, and the carbon dioxide comes from the boiler flue gas;

[0031] (4)...

Embodiment 2

[0037] A refined sugar clarification method, its operation steps are:

[0038] (1) Honey washing: Put the raw sugar into the top-suspension centrifugal honey separator, use R 4 Molasses cleans the pigment on the surface of raw sugar to obtain honey-washed raw sugar;

[0039] (2) Dissolving sugar: dissolving the honey-washed raw sugar with 80°C washing filter cloth water in a sugar-dissolving box to obtain 60.0°Bx back-dissolving syrup for subsequent use;

[0040] (3) Carbon filling: first pump the remelted syrup to the No. 1 carbon filling tank, and add lime milk and carbon dioxide to the No. The carbon-filled syrup is pumped to the No. 2 carbon-filled tank, and carbon dioxide is continued to be filled into the No. 2 carbon-filled tank to obtain the 2-carbon-filled syrup for use. The alkalinity of the 1-carbon-filled syrup is 0.03 and the pH value is 10.5. , the pH value of carbon dioxide filling is 8.2, and the carbon dioxide comes from the boiler flue gas;

[0041] (4) Pl...

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Abstract

A refined sugar clarifying method comprises steps as follows: cleaning up a pigment on the surface of raw sugar with molasses to obtain molasses-cleaned raw sugar; dissolving the molasses-cleaned raw sugar in hot water to obtain re-dissolved syrup for use; performing carbonation on the re-dissolved syrup twice to obtain second carbonation syrup; filtering the second carbonation syrup with a plate-and-frame filter press to obtain filtered syrup; pumping the filtered syrup to a ceramic-membrane microfiltration working tank, and performing microfiltration clarification on the filtered syrup with a ceramic membrane with the membrane pore diameters ranging from 0.2 mu m to 0.5 mu m to obtain a clear syrup for use; cooling the clear syrup with a plate heat exchanger and then sending the clear syrup to a first ion exchange resin column to obtain a first infiltration liquid, and then sending the first infiltration liquid to a second ion exchange resin column to obtain a second infiltration liquid, that is, refined sugar. The re-dissolved syrup subjected to carbonation and filtration by the aid of the plate-and-frame filter press is clarified by the ceramic microfiltration membrane, so that the turbidity of the re-dissolved syrup before the re-dissolved syrup enters ion exchange resin is reduced, and the service life of the ion exchange resin is prolonged.

Description

technical field [0001] The invention relates to a refined sugar clarification method, which belongs to the technical field of sugar production engineering. technical background [0002] In the clarification process of refined sugar, the traditional method is to remove 40% to 50% of the pigment in the raw sugar by washing with honey, and then dissolve the raw sugar to obtain a re-dissolved syrup, and then use carbon saturation and filtration or phosphoric acid floating and filtration The method removes 40% to 60% of the remaining pigment in the re-dissolved syrup, and finally uses an ion exchange resin to desalt and decolorize the re-dissolved syrup. After crystallization, a product with a purity of about 99.9% can be obtained. However, the turbidity of the re-dissolved syrup after carbon saturation and filtration or phosphoric acid floatation and filtration is still high, and it is easy to contaminate the ion exchange resin in the subsequent process, which not only increases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/00C13B20/06C13B20/16C13B20/14
CPCC13B20/00C13B20/06C13B20/142C13B20/16C13B20/165
Inventor 李凯李文黄玭杭方学陆海勤李红陆登俊谢彩锋项俊华
Owner GUANGXI UNIV
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