Method for clarifying ultrasonically-enhanced sugarcane juice

Abstract

The invention discloses a method for clarifying ultrasonically-enhanced sugarcane juice, comprising the following steps: preliming the mixed sugarcane juice; heating the mixed sugarcane juice for the first time; leading CO2 and Ca(OH)2 to the mixed sugarcane juice to carbonize the mixed sugarcane juice in a ultrasonic reaction device, wherein the weight of the Ca(OH)2 is 0.01-0.3 percent of the weight of the mixed sugarcane juice, and the molar mass ratio of the CO2 to the Ca(OH)2 is 1:1; adding SO2 and Ca(OH)2 to enable the mixed sugarcane juice which comes out of the ultrasonic reaction device to be subjected to the sulphitation and the neutralization, or adding part of the mixed sugarcane juice which is not carbonized by the CO2 to the mixed sugarcane juice which comes out of the ultrasonic reaction device to enable the same two to be subjected to the sulphitation and the neutralization, where the addition amount of the SO2 and the Ca(OH)2 is 55-59 percent of the addition amount of the SO2 and the Ca(OH)2 which are added to enable the mixed sugarcane juice to be subjected to the sulphitation and the neutralization; heating the mixed sugarcane juice; and precipitating the mixed sugarcane juice. The method for clarifying the ultrasonically-enhanced sugarcane juice can improve the neutralization speed and the neutralization degree of the sugarcane juice and reduce the content of the residual sulfur.

Description

【Technical field】 The invention relates to a sugar making process, in particular to an improved sugarcane juice clarification process. 【Background technique】 The color value and sulfur content of white granulated sugar are the most important and most technically difficult quality indicators of white granulated sugar. Decolorization in sugar mills is done through clarification. At present, the most commonly used clarification processes in sugar factories are mainly sulfurous acid method and carbonic acid method. In the sulfite clarification process, by adding SO 2 , milk of lime and phosphoric acid to form calcium sulfite precipitation and calcium phosphate precipitation to adsorb and remove the colloids and pigments in the sugar juice. The advantages of the sulfurous acid method are short process flow, simple equipment and less investment, but the clarification effect is not as good as that of the carbonic acid method. In the carbonation clarification process, by adding ...

AI Technical Summary

Problems solved by technology

However, the carbonic acid clarification process is complex and requires more equipment, and lime and CO 2 The consumption is large and the investment is large, so it has been gradually replaced by the sulfurous acid method

To develop a new clarification process that has both the advantages of the sulfite process and the carbonic acid process, and has low investment, is a more concerned issue in the field of sugar production; To clarify the process, there are successive publication numbers: CN1317577A, CN101280344A patent technology disclosures, but these methods are only a simple combination of the two methods, and cannot greatly improve the neutralization reaction speed and reaction degree, and improve the decolorization effect

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