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Clear-muddy separation settling technology of sugar production

A sugar juice and turbidity technology, applied in the field of sugarcane juice purification, purification and separation technology, can solve the problems of low production cost, environmental pollution and high cost of lime method

Inactive Publication Date: 2007-02-14
周少基
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among the above methods, the lime method has the lowest production cost, but it can only produce raw sugar. The sulfurous method and carbonic acid method are used to produce cultivated white sugar. Among them, the sulfur dioxide content of white sugar produced by The quality of white sugar produced by the bisulfuric acid method is good, but the cost is high, and a large amount of calcium carbonate alkaline filter mud is produced, which pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: The second-pressed juice from the second press is filtered to obtain the second-pressed juice. The second-pressed juice is mixed with 10-20% of the first-pressed juice, and lime milk is added until the pH value = 7.8-8.2, and heated to 65~75℃, add 300~400ppm phosphoric acid, add lime milk until the pH value is about 10~11, carry out stirring reaction at 1500~2000 rpm and inflate for 1 minute, add 10~12ppm polyacrylamide flocculant, stir reaction 1 Minutes, then float up in the air flotation device to obtain the floating clear juice and the floating mud juice, the mud juice is filtered, and the obtained filtered juice is combined with the floating clear juice to obtain the double-pressed clear juice. The second-pressed clear juice is mixed with the filtered first-pressed juice from the first press to obtain the mixed juice, heated to 100°C, added with 1-2ppm polyacrylamide flocculant, stirred and reacted for 3 minutes, and then enters the settler Sedimentation...

Embodiment 2

[0015] Example 2: The second-pressed crude juice from the second press is filtered to obtain the second-pressed juice, add milk of lime until the pH value = 6.8-7.2, heat to 55-60°C, add milk of lime until the pH value is about 11.5 ~12, add 0.1% magnesium sulfate of sugarcane juice (make a 0.5% concentration solution), carry out stirring reaction for 3 minutes, add 1~2ppm polyacrylamide flocculant, stir reaction for 3 minutes, then carry out sedimentation in the settler The sedimentation clear juice and the sedimentation mud juice are obtained, the mud juice is filtered, and the obtained filtered juice is combined with the sedimentation clear juice to obtain a double-pressed clear juice. The second-pressed clear juice is combined with the first-pressed juice from the first press to obtain a mixed juice. Add phosphoric acid to the mixed juice until the phosphoric acid content of the sugarcane juice is 300ppm, add lime milk until the pH value of the sugarcane juice is 6.8-7.2, a...

Embodiment 3

[0016] Embodiment 3: the second-pressed juice is mixed with 30% of the first-pressed juice, and the milk of lime is added until the pH value is approximately equal to 7, heated to 55-60°C, and carbon dioxide and milk of lime are added until the amount of calcium carbonate produced is 2% of that of sugarcane juice. Keep the pH value equal to 10-11, carry out stirring reaction for 3 minutes, and then filter, and the resulting filtered juice is fed with carbon dioxide until the pH value is 9, adding 5 ppm polyaluminum chloride, stirring and reacting for 3 minutes, adding polyacrylamide flocculant (1 ~2ppm), stirring and reacting for 3 minutes, and then settling in a settler to obtain sedimentation clear juice and sedimentation mud juice, the mud juice is filtered, the obtained filtered juice and sedimentation clear juice are combined to obtain a second-pressure clear juice, and the second-pressure clear juice is mixed with the initial pressure juice To make a mixed juice, add phos...

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Abstract

The invention relates to cane juice purifying separating technology of sugar making. It includes the following steps: separating the initial extraction liquid and the secondary at sugar cane juicing stage; adding lime cream or other basic compound into the secondary extraction liquid or their mixture to make the pH value equal to 8.0-13; once or many times clarifying of chemical coagulation, flocculation, and solid-liquid separation; mixing the clarified liquid with the initial extraction liquid to do further clarifying by limebase process, phosphoric acid and sulphitation process.

Description

technical field [0001] The patent of the invention belongs to a process technology for cleaning, purifying and separating cane juice produced in sugar production. Background technique [0002] The sugar cane sugar production process includes juice extraction, cleaning, crystallization, nectar separation and drying. The cleaning process of sugarcane juice is a physical and chemical separation and purification technology of the solution. At present, the main method is to add chemical coagulation precipitant and flocculant to the sugarcane juice to destabilize, adsorb and granulate the non-sugar components. Unit operations such as heating, sedimentation and filtration are used for separation. At present, the main clarification methods used in industry are lime method, sulfurous acid method and carbonic acid method. Its main process is: [0003] 1. Lime method: sugarcane is squeezed to obtain mixed cane juice, and lime milk is added to the mixed juice until the pH value is ab...

Claims

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Application Information

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IPC IPC(8): C13D3/02C13B20/02
Inventor 周少基
Owner 周少基
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