Clarification method for sugarcane juice

A technology for squeezing juice and cane juice, which is applied in the field of clarification of sugarcane squeezed juice, can solve the problems of increasing residual sulfur dioxide, increasing the amount of sulfur, increasing the cost of sugar production, etc., and achieves the reduction of residual sulfur dioxide, reduction of emission, and color value Reduced effect

Inactive Publication Date: 2008-10-08
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

In the past, because the market had lower requirements on the color index of white sugar, most sugar factories controlled the intensity of sulfur fumigation between 18 and 20. With the implementation of the "White Sugar GB317-2006" standard, the standard for the color value of the first-grade white sugar was changed from the original

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  • Clarification method for sugarcane juice
  • Clarification method for sugarcane juice
  • Clarification method for sugarcane juice

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In the process flow of sulfite process, phosphoric acid and lime are added to the squeezed juice, and after one heating (heating temperature is 55-60°C), the cane juice is transported to the reactor to add lime and CO 2 Carry out carbonation, the amount of lime added is 0.1% of the amount of cane juice, CO 2 The effective absorption is 0.08% of the sugarcane juice, the pH value is controlled between 9.0 and 9.5, the filling temperature is controlled at 55-60°C, and then the sugarcane juice is sulfur fumigated and ashed with sulfur dioxide and lime as clarifiers. The sulfur fumigation intensity is 3, the pH value of the sulfur fumigation is 6.5-7.2, and after the second heating to 100-103°C, the calcium carbonate precipitate and the calcium sulfite precipitate are precipitated in the settler together, and the carbon dioxide comes from the exhaust gas of the boiler flue. The mud juice obtained from the settler enters the suction filter, and the filtered mud is used as fer...

Embodiment 2

[0025] In the sulfite process process, phosphoric acid and lime are added to the squeezed juice, and after one heating (heating temperature is 45-55°C), the cane juice is transported to the reactor with flue gas (CO 2 ) is full, the amount of lime added is 0.9% of the amount of sugarcane juice, CO 2 The effective absorption is 0.8% of the sugarcane juice, the pH value is controlled between 10.5-11.0, the filling temperature is controlled at 45-55°C, the full-filled sugarcane juice is first heated to 65-70°C for the second time, and then Solid-liquid separation removes solid impurities, and the obtained clear juice is treated with sulfur dioxide and lime as clarifying agents for sulfur fumigation and ash neutralization. The sulfur fumigation intensity is 18, and the sulfur fumigation pH value is 7.2 to 7.8, and then heated for the third time to After 100-103°C, the cane juice enters the settler to separate the sediment from the clear juice. The mud juice obtained from the sett...

Embodiment 3

[0027] In the sulphite process flow, phosphoric acid and lime are added to the squeezed juice, and after heating (55-70°C) once, the cane juice is transported to the reactor with the waste gas produced by alcohol (CO 2 ) is full, the amount of lime added is 0.4% of the amount of sugarcane juice, CO 2 The effective absorption is 0.32% of the sugarcane juice, the pH value is controlled between 8.2 and 8.4, the filling temperature is controlled at 55-70°C, and calcium carbonate is formed to absorb impurities in the sugarcane juice and form solid impurities. The sugarcane juice containing solid impurities is then sulfur fumigated and ash neutralized with lime and sulfur dioxide (sulfur fumigation intensity: 10) as clarifiers. The pH value of sulfur fumigation is controlled at 6.8-7.2. The calcium precipitate is precipitated in the settler together with the calcium sulfite precipitate. The mud juice obtained from the settler enters the suction filter, and the filtered mud is used ...

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Abstract

The invention discloses a clarification method for cane expressed juice, which is an improvement for sulfurous acid method manufacturing technique of a cane sugar factory. The cane juice is conveyed into a reactor after the first heating, and carbonation is performed through adding lime and carbon dioxide; solid-liquid separation can be performed to the carbonation cane juice to remove solid impurity, and the stoving liming neutralization treatment is performed to the obtained clear juice taking sulfur dioxide and lime as clarificant; the stoving liming neutralization treatment can be also performed to the turbid carbonation cane juice directly taking sulfur dioxide and lime as clarificant. The stoving liming neutralization cane juice is conveyed into a settler after the second heating, and the clear juice and the mud juice are separated. The clarification method has the advantages that the brenstone use level is reduced, the production cost is saved, the sulfur dioxide residual in white sugar is decreased greatly, the product quality is improved, the carbon dioxide discharge amount is reduced, the clear juice purity is increased by 1 to 1.5, the white granulated sugar color value is reduced by twenty percent, and therefore the environment problem does not exist.

Description

technical field [0001] The invention belongs to a sugar production method using sugarcane as a raw material, in particular to a clarification method for pressed sugarcane juice. Background technique [0002] There are three commonly used methods for sugar clarification process using sugarcane as raw material: [0003] 1. Lime method: the sugarcane juice clarification method uses lime as the main clarifier. The process plan is to add lime to the mixed juice to adjust the pH value to 7.8-8.3, then heat it to 101-105°C, and send it to a settler for clarification. The mud juice is sent to the filter press to filter to obtain the filtered mud and clear juice, and the clear juice is sent to the evaporation tank for concentration, and finally the raw sugar is crystallized. This process is relatively simple, but the clarification effect is poor, and it can only be used to produce raw sugar, not white granulated sugar. [0004] 2. Carbonation method: a clarification method with lim...

Claims

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Application Information

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IPC IPC(8): C13D3/06C13B20/06
Inventor 曾仪飞
Owner 南宁苏格尔科技有限公司
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