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Phosphoric acid-sulphurous acid clarification process segmented preliming method

A technology of sulfurous acid and phosphoric acid, which is used in the purification of alkaline earth compounds, sucrose production, sugar production, etc., can solve the problems of re-decomposition and low clarification efficiency, and achieve the effect of reducing fouling, saving energy and improving clarification efficiency.

Inactive Publication Date: 2019-02-12
广西糖业集团金光制糖有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a segmented pre-ash method for phosphoric acid-sulfurous acid clarification process in view of the low clarification efficiency in the pre-ash process and the re-decomposition of non-sugar content in the pre-ash process under high temperature conditions.

Method used

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  • Phosphoric acid-sulphurous acid clarification process segmented preliming method
  • Phosphoric acid-sulphurous acid clarification process segmented preliming method
  • Phosphoric acid-sulphurous acid clarification process segmented preliming method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add phosphoric acid solution to the mixed juice obtained from the pressing workshop, control the total phosphoric acid value of the mixed juice at 350mg / kg, adjust the pH value of the treated juice to 6.5 with the digested lime milk, and transfer the treated mixed juice to a constant temperature In the reaction tank, mechanically stir and react for 10 minutes at room temperature at 20°C. After the reaction, use a high-efficiency multi-stage separation sugar juice settler to separate the primary separation juice, mud juice and scum, and return the primary separation juice to the original mixed juice box; Heating to 60°C for the first time, adjusting the pH value to 7.2 with the sterilized milk of lime, reacting with mechanical stirring for 10 minutes, and part of the precipitate precipitated; heating again to 65°C for the third ash addition, using the sterilized milk of lime Add ash for the third time, adjust the pH value to 8.5, and react with mechanical stirring for 10 ...

Embodiment 2

[0025] Add phosphoric acid solution to the mixed juice obtained from the pressing workshop, control the total phosphoric acid value of the mixed juice at 450mg / kg, adjust the pH value of the treated juice to 7.2 with milk of lime, and transfer the treated mixed juice to a constant temperature In the reaction tank, mechanically stir and react for 15 minutes at room temperature at 35°C. After the reaction, use a high-efficiency multi-stage separation sugar juice settler to separate the primary separation juice, mud juice and scum, and return the primary separation juice to the original mixed juice tank; Heating to 68°C for the first time to add ash for the second time, adjust the pH value to 8.0 with the sterilized milk of lime, and react with mechanical stirring for 15 minutes, and part of the precipitate precipitates; heat again to 75°C, use the sterilized milk of lime Carry out the third ash addition, adjust the pH value to 9.5, and react with mechanical stirring for 15 minute...

Embodiment 3

[0027] Add phosphoric acid solution to the mixed juice obtained from the pressing workshop, control the total phosphoric acid value of the mixed juice at 400mg / kg, adjust the pH value of the treated juice to 6.7 with milk of lime, and transfer the treated mixed juice to a constant temperature In the reaction tank, mechanically stir and react for 15 minutes at room temperature at 25°C. After the reaction, use a high-efficiency multi-stage separation sugar juice settler to separate the primary separation juice, mud juice and scum, and return the primary separation juice to the original mixed juice tank; Heating to 62°C for the first time to add ash for the second time, adjust the pH value to 7.4 with the sterilized milk of lime, react with mechanical stirring for 15 minutes, and part of the precipitate precipitates; heat again to 67°C, use the sterilized milk of lime Add ash for the third time, adjust the pH value to 8.7, and react with mechanical stirring for 15 minutes. After t...

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Abstract

The invention discloses a phosphoric acid-sulphurous acid clarification process segmented preliming method, and belongs to the technical field of a sugar refining industry clarification process. The preliming method is characterized in that mixed juice is firstly subjected to normal temperature preliming, so that acidic amino acid such as collagen and caseinum is condensed; then, first heating isperformed to 60 to 68 DEG C; secondary lime addition is performed (the pH value is controlled to be 7.8 to 8.0); pigment, silica gel and the like are condensed; third lime addition is performed (the pH value is controlled to be 8.5 to 9.5, and the temperature is 65 to 75 DEG C), so that arginine, lysine, histidine and the like are condensed. Different condensation points of colloform are used, sothat the colloform is condensed at sub stages; under the heating effect, further consolidation is performed; meanwhile, the colloform redissolution and the sugar conversion loss due to the low pH value in the stoving process are also avoided; through solid liquid separation and removal, the clarifying efficiency is improved; the evaporating pot scale deposit is reduced; the white sugar product quality stability is improved; the energy saving effect is obvious.

Description

technical field [0001] The invention belongs to the field of sugarcane juice clarification, and in particular relates to a segmented pre-ashing method of a phosphoric acid-sulfurous acid clarification process. Background technique [0002] At present, sugar factories adopt high crushing degree, high temperature infiltration and forced reeling in the aspect of pressing and extracting juice. Some factories also adopt measures such as high oil pressure to achieve high crushing capacity, high extraction and low bagasse moisture. But the advantages and disadvantages coexist, sugarcane contains a large number of various non-sugars, one of which is the protein, pectin, cane wax, starch and other non-sugars contained in sugarcane itself; Slag, mud foam and other inclusions. All kinds of non-sugar and human-made inclusions in these sugarcane will be brought into the cane juice, which will increase the difficulty of clarification of cane juice, and also increase various clarifiers, i...

Claims

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Application Information

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IPC IPC(8): C13B20/06C13B20/00
CPCC13B20/06C13B20/00
Inventor 林以宋卢若伟罗凤玉韦红桥农皓
Owner 广西糖业集团金光制糖有限公司
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