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Method for settling extracted sugarcane juice by using weak base

A technology of squeezing juice and weak alkaline, which is applied in the purification of sugar juice, purification by physical methods, and sucrose production, etc., can solve the problems of increasing the color value of white sugar, limiting the quality of sucrose, and improving the recovery rate of cooking.

Inactive Publication Date: 2013-05-22
南宁苏格尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although in the process of sugar production by sulfite process, increasing the pH value can remove more non-sugar impurities, improve the purity of clear juice and syrup, and help improve product quality and recovery rate of cooking; but high pH value will make sugar juice Maillard reaction occurs to form new pigments, resulting in an increase in the color value of white sugar
Therefore, in order to ensure the color index of white sugar in the production of sulfitic sugar factories, the pH value of the sugar juice during sulfur fumigation and neutralization is usually controlled at a neutral level, which limits the improvement of the quality of sucrose and the recovery rate of scouring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Squeeze sugarcane into cane juice, filter the squeezed sugarcane juice, control the absolute dry cane bran content of the filtered cane juice to be below 2.4g / L, add phosphoric acid and milk of lime to adjust the pH, and heat the adjusted pH to a suitable Sulfur fumigation and ashing neutralization temperature, feed sulfur dioxide with sulfur fumigation strength of 40g / L for sulfur fumigation, then add milk of lime for neutralization, after neutralization, control pH to be 8.8; heat the neutralized sugarcane juice to Appropriate settling temperature, sent to the fast settler for settling and separation, and separated clear juice 1 and mud juice 1;

[0033] Send the mud juice 1 into the mixing equipment, control the content of the absolute dry cane bran to 2g / L by adding an appropriate amount of sugarcane bran, and then send it to the filter equipment for filtration to obtain the clear juice 2; send the clear juice 2 to the filter juice settler Sedimentation and separati...

Embodiment 2

[0035]Squeeze sugarcane into cane juice, filter the squeezed sugarcane juice, control the absolute dry cane bran content of the filtered cane juice to be below 2.4g / L, add phosphoric acid and lime milk to adjust the pH to 6.5, and heat the adjusted pH cane juice to 55°C, introduce sulfur dioxide with a sulfur fumigation intensity of 24g / L for sulfur fumigation, then add lime milk for neutralization, and control the pH to 7.8 after neutralization; heat the neutralized cane juice to 100°C, and send it into the rapid Sedimentation and separation are carried out in the settler, and clear juice 1 and mud juice 1 are separated;

[0036] Put the mud juice 1 into the mixing equipment, control the content of the dry sugar cane bran to 20g / L by adding an appropriate amount of sugarcane bran, and then send it to the filter equipment for filtration to obtain the clear juice 2; send the clear juice 2 to the filter juice settler Sedimentation and separation in medium to obtain clear juice 3...

Embodiment 3

[0038] Squeeze sugarcane into cane juice, filter the squeezed sugarcane juice, control the absolute dry cane bran content of the filtered cane juice to be below 1.0g / L, add phosphoric acid and lime milk to adjust the pH to 10.5, and heat the adjusted pH cane juice to 65°C, introduce sulfur dioxide with a sulfur fumigation strength of 20g / L for sulfur fumigation, then add lime milk for neutralization, and control the pH to 8.2 after neutralization; heat the neutralized sugarcane juice to 102°C, and send it into the Sedimentation and separation are carried out in the settler, and clear juice 1 and mud juice 1 are separated;

[0039] Send the mud juice 1 into the mixing equipment, control the content of the absolute dry cane bran to 10g / L by adding an appropriate amount of sugarcane bran, and then send it to the filter equipment for filtration to obtain the clear juice 2; send the clear juice 2 to the filter juice settler Sedimentation and separation in medium to obtain clear jui...

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Abstract

The invention aims to provide a method for settling extracted sugarcane juice by using a weak base. The method comprises the following steps of: filtering the extracted sugarcane juice, adding lime and phosphoric acid to adjust the pH value, heating for the first time, fumigating with sulphur, adding lime to neutralize, heating for the second time, settling the neutralized sugarcane juice, and separating a supernate from a puree. In the step of filtering the extracted sugarcane juice, the content of the absolute-dry sugarcane chaff in the filtered extracted sugarcane juice is controlled below 2.4g / L, and in the steps of fumigating with the sulphur and adding the lime to neutralize, the pH value of the extracted sugarcane juice is controlled at 7.8 to 9. The sucrose prepared by adopting the method has high quality, has a few impurities and is low in color value and high in yield. The scouring and recovering rate of the finally prepared sucrose can be improved by more than 2%, and the improvement is considerable to the enterprises making ten thousand tons of sucrose annually. The whole process dispenses with complex flows, and the cost is kept unchanged. The method has high practical and economic values.

Description

technical field [0001] The invention relates to the field of sugar cane sugar production, in particular to a weak alkaline clarification method for pressed sugar cane juice. Background technique [0002] Sucrose is one of the basic food additives for humans with a history of thousands of years. It is the main product of photosynthesis, widely distributed in plants, especially in sugar beet and sugarcane. Sugar with sucrose as the main component is divided into rock sugar, white granulated sugar, cotton white sugar and brown granulated sugar according to the degree of purity. Sucrose is the most abundant in beet and sugar cane. The white sugar and brown sugar that are usually used are all sucrose. [0003] There are three commonly used methods for sugar clarification process using sugarcane as raw material: [0004] Lime method: the sugarcane juice clarification method with lime as the main clarifier. The process plan is to add lime milk to the mixed juice, adjust the pH va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/00C13B20/02C13B20/16
Inventor 薛原王祥贵周彩桃何东宁黎有方任光宋李泽强
Owner 南宁苏格尔科技有限公司
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