Sugarcane juice clarification method with intensified sulfitation-neutralization reaction

Abstract

The invention provides a cane juice clarification method for a reinforced sulfur fumigation neutralization reaction, which relates to a clarification process method for sugar processing. The method adopts the sulfurous method clarification process which comprises preliming, first heating, sulfur fumigation neutralization, secondary heating and settlement procedures; the sulfur fumigation neutralization procedure comprises a reinforced sulfur fumigation neutralization reaction step in which the cane juice is filled in a vortex reaction device for reaction; and at the reinforced sulfur fumigation neutralization reaction step, the full or partial mixing of the cane juice is performed by the combination of the sulfur fumigation neutralization procedure, namely the mixed cane juice after the preliming and the first heating is fully or partially filled in the vortex reaction device, lime milk and SO2 are simultaneously added to the vortex reaction device, so that the reinforced sulfur fumigation neutralization reaction is carried out in the vortex reaction device, or in the prior sulfurous method clarification process; and the cane juice after the sulfur fumigation neutralization is fully or partially filled in the vortex reaction device to reinforce the sulfur fumigation neutralization reaction. The method has the advantages of improving the reaction speed and the reaction extent of the sulfur fumigation neutralization reaction, improving the decolorization effect, and reducing the residual sulfur content in white granulated sugar.

Description

technical field [0001] The invention relates to a sugar-making process, in particular to an improved cane juice clarification process for strengthening the neutralization reaction of cane juice sulfur fumigation. 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. In the currently most commonly used 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. Therefore, the adsorption capacity of calcium sulfite precipitation and calcium phosphate precipitation to colloidal pigment directly affects the clarification and decolorization effect. On the other hand, due to SO 2 and the addition of lime increases the SO in...

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Problems solved by technology

[0003] Although the sulfite clarification process has a long history and is quite mature, there are still many problems in the sulfur fumigation neutralization reaction in the sugar production process, which are mainly manifested in the following aspects: (1) sugarcane juice absorption SO 2 Slow and insufficient; (2) milk of lime and SO 2 The reaction is not complete; (3) The precipitated particles of calcium sulfite are not firm and the particle size is uneven

[0004] The above situation will cause the following hazards: (1) pH fluctuation of sugarcane juice in the follow-up process will affect the quality of sugar juice; (2) SO in clear juice 2 The large residual amount will eventually lead to high sulfur content in the finished white sugar, which will degrade the white sugar; (3) The high residual calcium salt content in sugar juice will lead to high ash content in the product and serious fouling of equipment and pipelines; (4) Inorganic substances in sugar juice The high content of the nectar increases the honey making rate and reduces the sugar recovery rate; (5) Lime and SO 2 Incomplete reaction, resulting in low sulfur fumigation intensity, SO 2 It is not fully utilized, and the amount of sulfur is large; (6) due to CaSO 3 The particles are not firm, the adsorption and sedimentation performance is reduced, and the decolorization effect is poor

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