Sugar making process for refining cane mixed juice by use of multi-stage membrane filtration technology

A technology of mixed juice and sugarcane, applied in the field of refined sugar, can solve the problems of low decolorization rate, unresolved impurity removal rate, low removal rate of non-sugar components, etc., achieve high decolorization rate, reduce color and turbidity and non-sugar The content of macromolecular substances and the effect of saving dehydration energy

Active Publication Date: 2015-11-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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Problems solved by technology

Although the above patents use technologies such as membrane microfiltration, ion exchange, and MVR, these improvements still h

Method used

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  • Sugar making process for refining cane mixed juice by use of multi-stage membrane filtration technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) 200kg of sugarcane mixed juice raw materials enter the heat exchange equipment and are heated to about 60°C by low-temperature waste heat steam or hot water;

[0033] 2), adjust the pH to 7 with sodium hydroxide, filter through a 5 micron non-woven filter bag to remove suspended particles, and obtain the filtrate A;

[0034] 3), pressurize the filtrate A to 0.1MPa and then enter the tubular microfiltration membrane module. The organic microfiltration membrane of 0.2 microns is used in the membrane module. Driven by pressure, the remaining suspended particles in the filtrate A, Macromolecular substances, colloids, etc. are intercepted, sucrose is completely penetrated, and filtrate B is obtained;

[0035] 4) Continue to heat the filtrate B at 60°C, pressurize it to 1.0MPa and enter the roll-type ultrafiltration membrane module. The organic ultrafiltration membrane with a molecular weight cut-off of 3000Da is selected in the membrane module. Driven by pressure, the fil...

Embodiment 2

[0040] 1) 200kg of sugarcane mixed juice raw materials enter the heat exchange equipment and are heated to 65°C by low-temperature waste heat steam or hot water;

[0041] 2), adjust the pH to 8 with calcium hydroxide, remove the suspended particles through a centrifuge at 4000 rpm, and obtain the filtrate A;

[0042] 3), pressurize the filtrate A to 0.05MPa and enter the hollow fiber microfiltration membrane module. The organic hollow fiber microfiltration membrane of 0.1 micron is selected in the membrane module. Driven by pressure, the remaining Suspended particles, macromolecular substances, colloids, etc. are intercepted, sucrose is completely penetrated, and filtrate B is obtained;

[0043] 4), continue to heat the filtrate B to about 65°C, pressurize it to 1.0 MPa, and enter the roll-type ultrafiltration membrane module. The organic ultrafiltration membrane with a molecular weight cut-off of 2000Da is used in the membrane module. Driven by pressure, the filtration The r...

Embodiment 3

[0048] 1) 200kg of sugarcane mixed juice raw materials enter the heat exchange equipment and are heated to 70°C by low-temperature waste heat steam or hot water;

[0049] 2), add alkali to adjust the pH value to 7.5, remove suspended particles through a centrifuge at 4000 rpm, and obtain filtrate A;

[0050] 3), the filtrate A is pressurized to 0.05MPa and enters the hollow fiber microfiltration membrane module, and the organic hollow fiber microfiltration membrane of 0.1 micron is used in the membrane module. Driven by pressure, the remaining suspended particles in the filtrate A Particles, macromolecular substances, colloids, etc. are intercepted, sucrose is completely penetrated, and filtrate B is obtained;

[0051] 4), continue to heat the filtrate B to about 70°C, pressurize it to 1.0MPa, and enter the roll-type ultrafiltration membrane module. The organic ultrafiltration membrane with a molecular weight cut-off of 1000Da is selected in the membrane module. Driven by pres...

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Abstract

The present invention relates to a sugar making process for refining cane mixed juice by use of a membrane separation technology. The process comprises: heating cane mixed juice; adding an alkaline substance into the heated cane mixed juice to regulate the pH value;separating suspended impurities such as bagasse and the like from the cane mixed juice; collecting a separated liquid phase; removing suspended impurities with small particle sizes, macromolecules, colloids and the like through filtration of a microfiltration membrane; putting the collected filtrate into an ultrafiltration membrane with the molecular weight cutoff greater than that of sucrose; removing pigments and non-sugar substances with molecular weight greater than that of sucrose; using a nanofiltration membrane with the molecular weight cutoff less than that of sucrose molecules to concentrate a decolorized clear liquid; and removing inorganic salts with molecular weight less than that of the sucrose, monosaccharide and the like by virtue of the nanofiltration membrane. Compared with the traditional process, the process provided by the present invention is capable of greatly reducing the chroma and turbidity of the sugar juice, greatly reducing the content of nonsugar macromolecular substance in the sugar juice, and increasing the purity and yield of sucrose, and is free of clarifying agents such as lime and the like in the main process.

Description

technical field [0001] The invention belongs to the technical field of refined sugar, in particular to a process for processing refined sugar of sugarcane mixed juice by using multi-stage membrane filtration technology. Background technique [0002] At present, domestic sugarcane sugar production processes mainly include lime method, sulfurous acid method and carbonic acid method according to different clarification processes. The clarification treatment steps in the above methods mainly include three processes: heating cane juice, adding clarifier, and separation and precipitation. The above method uses clarifiers to remove impurities such as non-sugar components in the initial sugar juice, and at the same time reduces the color and turbidity of the sugar juice, but the above methods generally have complex processes, low decolorization rate, low removal rate of non-sugar components, and clarifier consumption A large amount, affecting the taste and other issues. The clarifi...

Claims

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Application Information

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IPC IPC(8): C13B20/16
Inventor 宋伟杰万印华罗建泉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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