Intensified cane juice clarification method

Abstract

The invention relates to an intensified cane juice clarification method which comprises pre-liming, primary heating, CO2 full filling, sulphitation and neutralization, secondary heating and settlement; the CO2 full filling procedure is as follows: pre-limed and primarily heated mixed juice is fed with CO2 and Ca(OH)2, the mixed juice is fed into an eddy reactor to have CO2 full filling reaction, and then the cane juice from the eddy reactor has sulphitation and neutralization reactions or is added with some the mixed juice which does not have CO2 full filling reaction to carry out the sulphitation and neutralization reactions; the amount of the Ca(OH2) which is fed into the mixed juice in the CO2 full filling procedure is about 0.05 percent of the weight of the cane juice, and the molar ratio of the amount of CO2 to the amount of Ca(OH)2 is 1:1, and the amount of SO2 and the Ca(OH)2 added in the sulphitation and neutralization reactions is 55 to 95 percent of the amount required in the traditional sulphitation and neutralization reactions. The method can improve the cane juice neutralization reaction speed and the reaction degree as well as the decolorization effect, and reduce the residual sulfur.

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 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 pro...

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

[0003] 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 disclosure, but these methods are only simply combining the two methods, and cannot greatly improve the neutralization reaction speed and reaction degree, and improve the decolorization effect

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