Sugarcane juice clarifying method

Abstract

The invention discloses a sugarcane juice clarifying method. The method comprises the steps of: sequentially performing pre-liming, primary heating, foam making and air-floating separation on mixed juice which accounts for 30-95% of the total amount of mixed juice to obtain floating clear juice; mixing the rest mixed juice with the floating clear juice to obtain a mixed clear juice; and secondarily heating the mixed clear juice, stoving and neutralizing the mixed clear juice, heating the neutralized juice, and rapidly settling the neutralized juice to obtain clear juice, wherein the mixed juice is sugarcane juice obtained by the work procedure of pressing sugarcanes. The air-floating separation of part of mixed juice is combined with the rapid settlement of the rest of the mixed juice, the staying time of the sugarcane juice can be shortened, the remove rate of the non-sugar ingredient is increased, the pH value of the clear juice is stable, the phenomena of 'bottom reversing' of a settlement tank and 'cane sugar conversion' are avoided, the production cost is saved, the environment pollution is reduced and the product quality is improved.

Description

technical field [0001] The invention relates to a process for making sugar from sugarcane, in particular to a method for clarifying sugarcane juice. Background technique [0002] my country is the world's major producer and consumer of sucrose. More than 90% of the sugar factories use the phosphoric acid-sulfurous process to produce sucrose, and less than 10% of the sugar factories use the carbonic acid process to produce sucrose. The quality of sucrose produced by carbonic acid method is better than that of sulfurous acid method, but the production cost is high, and the pollution problem caused by carbonic acid filter mud is difficult to solve, which makes it difficult to promote the carbon method process. Traditional sulfite clarification process: sugarcane mixed juice is pre-ashed → primary heating (55-65°C) → adding phosphoric acid, passing sulfur dioxide gas for sulfur fumigation → adding lime milk to neutralize to pH 6.8-7.2 → secondary heating ( 98~102℃) → to the sed...

AI Technical Summary

Problems solved by technology

[0004] However, the air flotation separation method uses a large amount of sulfur dioxide, phosphoric acid, milk of lime and flocculants, the amount of raw materials is large, the production cost is high, and it causes environmental pollution. At the same time, the residue will affect the quality of clear juice and white sugar, and then affect human health.

According to the existing technology and equipment, our company has improved the sugarcane juice clarification process and achieved good results. There is no relevant literature report so far.

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