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Sulfurous method sugar refining segmented preliming clarifying process

A sulfurous acid method and process technology, which is applied in sucrose production, sugar production, and sugar juice purification, etc., can solve the problems of low energy consumption, poor product quality, and low clarification efficiency in the sugar recovery process, and achieve the improvement of the purity of clear juice , reduce evaporation fouling, improve the effect of sugar recovery

Inactive Publication Date: 2017-01-04
NANNING SUGAR INDUSTRY CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems of low clarification efficiency, poor product quality and insufficient stability in the traditional sulfite clarification process, and provide a segmental pre-stage sugar production process with sulfite process with good product quality, high sugar recovery rate and low process energy consumption. Ash clarification process

Method used

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  • Sulfurous method sugar refining segmented preliming clarifying process
  • Sulfurous method sugar refining segmented preliming clarifying process
  • Sulfurous method sugar refining segmented preliming clarifying process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: as figure 1 As shown, the traditional sulfurous acid clarification process is used to treat sugarcane juice. The process is as follows: sugarcane is used as raw material, and sugarcane juice is obtained after crushing, squeezing and extracting juice. After primary heating, add sulfur dioxide and lime milk to obtain neutralized juice. After secondary heating, the neutralized juice enters the sedimentation tank for sedimentation and separation to obtain clarified juice, which is the main raw material for the production of white sugar. The clarification process indicators are: the total value of added phosphoric acid is 400ppm, the pH value of prelime juice is 7.2, the primary heating temperature is 65°C, the sulfur fumigation intensity of sugarcane juice is 24CC, the neutralization pH value of sugarcane juice is 7.2, and the secondary heating temperature is 100°C.

[0028] The detection result of embodiment 1 is as follows:

[0029] Continuously collect and...

Embodiment 2

[0030] Embodiment 2: as figure 2 As shown, the sugarcane juice obtained by pressing and extracting juice is clarified by adopting the subsection pre-ash clarification process of sugar production by sulfite method of the present invention, and the specific implementation steps are as follows:

[0031] a) Pre-lime and pre-phosphorus: sugarcane juice is obtained after the sugarcane is squeezed and extracted, and phosphoric acid and milk of lime are added to the sugarcane juice at the same time to make the pH of the sugarcane juice 7.2;

[0032] b) Primary heating: the sugarcane juice is pre-ashed and pre-phosphorused and then sent to the heater for primary heating, and the heating temperature is controlled at 65°C;

[0033] c) Secondary pre-ashing: the cane juice is heated once and sent to the sulfur fumigation neutralizer for sulfur fumigation neutralization; lime milk is added before the sulfur fumigation neutralization, so that the pH of the cane juice is 8.2;

[0034] d) Su...

Embodiment 3

[0040] Example 3: The sugarcane juice obtained by squeezing and extracting juice is also clarified by using the sulfite method sugar production segmental pre-ash clarification process of the present invention. The operation steps and parameters are basically the same as those in Example 2. The only difference is: step c) The pH value of the sugar cane juice is 8.5.

[0041] The detection result of embodiment 3 is as follows:

[0042] Continuously collect cane juice and clarified juice samples for 2 hours, and test and analyze the purity of cane juice, clarified juice, color value, and pH value. The results are: the purity of cane juice is 83.02AP, the purity of clarified juice is 85.23AP, the color value of clarified juice is 53.11°st, and the pH value of clarified juice is 7.21.

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Abstract

The invention discloses a sulfurous method sugar refining segmented preliming clarifying process. The process includes the steps of preliming and pre-phosphorizing, primary heating, secondary preliming, stoving and neutralization, secondary heating and sedimentation. The segmented preliming technology is adopted in the clarifying process, preliming is carried out on cane juice after squeezing and juicing and before stoving and neutralization, after squeezing and juicing, phosphoric acid and lime milk are added into the cane juice at the same time, the pH value is controlled to be 6.8-7.2, and therefore protein and other colloidal substances in the cane juice are agglomerated in advance; secondly, lime milk is added before stoving and neutralization, the pH value is controlled to be 8.0-9.0, and it is avoided that much soluble calcium bisulfate is formed in the sulfur absorbing process of the cane juice. The technical scheme overcomes the defect that a traditional sulfurous method clarifying process is low in clarifying efficiency, product quality can be effectively improved, the sugar recovery rate can be effectively increased, and process energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of sucrose production, in particular to an improved sulphite sugar clarification process. Background technique [0002] my country is one of the earliest countries in the world to use sugar cane to make sugar. According to different sugar cane sugar making processes, there are mainly three methods: lime method, sulfurous acid method, and carbonic acid method. The lime method is commonly used in the production of raw sugar, while the carbonic acid method and the sulfurous acid method are used to produce white granulated sugar. At present, most sugar factories in China use the sulfurous acid clarification process, which has low clarification efficiency and low product quality and is not stable enough; Many enterprises adopt the carbonation process, which has high clarification efficiency and produces high-quality white sugar products, but the investment in equipment is large, and the resulting filter mud is difficult to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/00C13B20/06
CPCC13B20/00C13B20/06
Inventor 廖玉蓝恒星肖凌傅其军岑跃
Owner NANNING SUGAR INDUSTRY CO LTD
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