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Method for adjusting addition of flocculants in stoving neutral juice based on zeta potential value

A technology of flocculant and potential value, which is applied in the purification of sugar juice, sugar production, sucrose production, etc. It can solve the problems that the amount of flocculant is not optimal, affects the quality of white sugar products, and the quality of clear juice is low.

Inactive Publication Date: 2014-11-05
上海中道糖业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sugar factory mainly controls the optimal amount of flocculant addition based on production experience, and at the same time adjusts the quality of clear juice afterwards; in this way, the amount of flocculant is often not the optimal amount, and the ideal flocculation and clarification effect cannot be achieved. Lead to low quality of clear juice, which in turn affects the quality of white sugar products

Method used

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  • Method for adjusting addition of flocculants in stoving neutral juice based on zeta potential value
  • Method for adjusting addition of flocculants in stoving neutral juice based on zeta potential value

Examples

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Effect test

Embodiment 1

[0038] A method for adjusting the addition of flocculant in sulfur-fumigated neutralized juice based on the zeta potential value of clear juice after flocculation and clarification

[0039] In the clarification process of the existing sugar making process, firstly carry out the selection of step A. flocculant type:

[0040] ① When the zeta potential value of the clear juice after flocculation and clarification of the sulfur smoked neutralized juice is negative, a cationic flocculant is selected;

[0041] ② When the zeta potential value of the clear juice after flocculation and clarification of the sulfur-fumigated juice is positive, an anionic flocculant is selected.

[0042] Followed by B. The choice of flocculant dosage, every 30 minutes, sample the clear juice after the flocculation and clarification of the sulfur smoked neutralized juice once, and measure the zeta potential value of the clear juice after the flocculated and clarified sulfur smoked neutralized juice:

[0...

Embodiment 2

[0046] A method for adjusting flocculant addition in sulfur fuming neutralized juice based on zeta potential value, the method uses the initial zeta potential value of sulfur fuming neutralized juice as the basis for adding flocculant type to sulfur fuming neutralized juice:

[0047] The basic steps of this method are the same as step A of Example 1. The choice of the type of flocculant is to insert a rubber hose from the entrance hole of the sedimentation tank in the clarification process of the existing sugar making process, extract the sulfur-fumigated neutralized juice once every 30 minutes, and measure its initial zeta potential value:

[0048] ① When the initial zeta potential of the sulfur-fumigated juice is negative, a cationic flocculant is selected;

[0049] ② When the initial zeta potential of the sulfur-fumigated juice is positive, use an anionic flocculant.

[0050] In Embodiment 1 and Embodiment 2 of the present invention, the cationic flocculant refers to: cati...

Embodiment 3

[0053] A method for adjusting the ratio of adding a flocculant to the sulfur-fumigated juice based on the zeta potential value of the clear juice after flocculation and clarification of the sulfur-fumigated juice. As a basis, guide the compounding of different flocculants to form a composite flocculant, which is easy to compress the electric double layer, and can quickly reduce the zeta potential of the clear juice after flocculation and clarification of the sulfur-fumigated juice by means of electrical neutralization and adsorption. Composite flocculant is the optimal compound;

[0054] The composite flocculant includes a composite flocculant composed of polyaluminum chloride and chitosan or a composite flocculant composed of cationic polyacrylamine and polyaluminum chloride;

[0055] In the composite flocculant composed of polyaluminum chloride and chitosan, the ratio of polyaluminum chloride and chitosan is: 1:1, 1.5:1, 2.0:1, 2.5:1, 3:1, 4: 1, 5:1, 6:1, 7:1, 8:1, 9:1 or 1...

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Abstract

The invention relates to a method for adjusting addition of flocculants in stoving neutral juice based on the zeta potential value. The method comprises the following steps of: based on the zeta initial potential value of the stoving neutral juice or the zeta potential value of clean juice after the stoving neutral juice is flocculated and clarified, adding types of flocculants in different use levels to the stoving neutral juice, and guiding compounding of different flocculants to form a compound flocculant; when the zeta initial potential value of the stoving neutral juice or the zeta potential value of clean juice is a negative value, selecting a cationic flocculant, and maintaining the zeta potential value Phi1 of the clean juice in the range: Phi1 is greater than or equal to -2.1 and less than or equal to -1.9; when the zeta initial potential value of the stoving neutral juice or the zeta potential value of clean juice is a positive value, selecting a anionic flocculant, and maintaining the zeta potential value Phi1 of the clean juice in the range: Phi2 is greater than or equal to -2.7 and less than or equal to -2.4. The method not only ensures that the stoving neutral juice has the optimal flocculating and clarifying effect, but also is material-saving, and the quality of cane sugar is improved.

Description

technical field [0001] The invention relates to a sugar making process, in particular to an improved sugarcane juice clarification process. Background technique [0002] The clarification process is the key process of the sub-method sugar production process. The effect of sulfur fumigation and juice flocculation clarification is directly related to the quality of clear juice, including color value, turbidity and sugar purity, which in turn affects the quality of white sugar products. In the sugar clarification process, add polyacrylamide flocculant to flocculate, clarify and remove impurities from the sulfur smoked juice. The amount of flocculant added is generally 3-10ppm. High or low flocculant dosage will affect the flocculation and clarification. Effect. In the actual production process, due to the fluctuation of raw material cane and related processes, the sulfur-fumigated juice is unstable, and the optimal amount of flocculant must be adjusted accordingly. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13B20/00
Inventor 李利军李彦青黄永春崔越
Owner 上海中道糖业有限公司