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Method for delaying quality deterioration of raw sugar during storage

A technology for sugar storage and raw sugar, which is applied in the field of delaying the quality deterioration in the process of raw sugar storage, can solve problems such as the decline of raw sugar quality, pH value, and color value increase, so as to improve the quality of raw sugar and delay the conversion of raw sugar. The effect of increasing the rate and delaying the increase of the color value

Active Publication Date: 2022-08-02
COFCO GROUP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the storage of raw sugar, due to different external environmental factors and its own quality, it will undergo different degrees of deterioration, such as increased moisture content, lower pH value, lower sugar content, higher color value, etc. Even high-quality raw sugar During the storage process, the color value will still double, and the sucrose will be transformed. This series of changes will lead to a decline in the quality of raw sugar, which will have a great impact on the production load, sucrose recovery rate, processing cost and quality of refined sugar in the subsequent processing and preparation of refined sugar. big impact

Method used

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  • Method for delaying quality deterioration of raw sugar during storage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 2Kg of raw sugar with a pH of 6.0 and place it in a stirring tank, add 0.4g of calcium oxide solids in the stirring tank, stir evenly, take part of the raw sugar to measure the pH value of the raw sugar, the result is 8.0, and its water content 0.3% by weight.

[0042] The raw sugar and the raw sugar added with calcium oxide were placed in a constant temperature and humidity box (40°C, 70% RH) for storage, and the raw sugar quality (raw sugar color value, raw sugar) was observed and measured at 1, 4, 6, 9, and 14 weeks. Conversion rate) changes, the measurement results of the quality changes of raw sugar and raw sugar mixed with calcium oxide storage are shown in Table 1.

[0043] Table 1

[0044] Storage time / week 0 1 4 6 9 14 Raw Sugar Color Value (IU) 1145 1205 1356 1477 1897 2211 Calcium oxide-raw sugar color value (IU) 1145 1152 1186 1213 1531 1648 Raw sugar reducing sugar content (%) 0.81 1.30 2.70 3.65 4.30 ...

Embodiment 2

[0047] like figure 1 As shown, weigh 2Kg of raw sugar with a pH of 6.0 and place it in the drying chamber of the fluidized bed 1, and the calcium hydroxide aqueous solution is passed into the fluidized bed chamber through the liquid feed pipe 2, and its concentration is 0.14% by weight. The input volume is 400mL, the flow rate is 2.0mL / min, the air pressure in the feed pipe 1 is 2bar, the peristaltic pump sprays the calcium hydroxide aqueous solution on the raw sugar through the nozzle 4, and the fluidized bed cavity system is in a closed state during spraying. state. The working parameters of the fluidized bed are as follows: the air flotation air pressure of the air feed pipe 3 introduced through the gas feed pipe 3 is 4bar, and the flow rate of the introduced air is 80m 3 / h, the temperature in the fluidized bed chamber is 45°C, and the raw sugar material is kept continuously tumbling in the fluidized bed glass drying chamber. After the calcium hydroxide aqueous solution ...

Embodiment 3

[0052] The raw sugar on the line was transported to the drum drying stage through a conveyor belt at a flow rate of 30 t / h, and an aqueous calcium hydroxide solution (concentration of 0.16% by weight) was sprayed on the raw sugar through a feeding nozzle using a peristaltic pump. The working parameters of the drum drying are as follows: the drum drying temperature is 40°C, the drum drying time is 10min, the flow rate of the calcium hydroxide aqueous solution is 1.8mL / min, the feed air pressure is 3bar, and the raw sugar material is kept continuously tumbling in the drying chamber. The volume ratio of the calcium hydroxide aqueous solution pumped into the drum dryer to the mass ratio of raw sugar is 5:1. After the feed of the calcium hydroxide aqueous solution was completed, the feed pump and feed air valve were closed, and the pH value of the dried raw sugar was determined to be 7.5, and its water content was 0.4% by weight.

[0053] The raw sugar and the raw sugar sprayed wit...

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Abstract

The invention relates to the technical field of food processing, and discloses a method for delaying the quality deterioration of raw sugar during storage. The method for delaying the quality deterioration of raw sugar in the storage process of the present invention comprises the step of adding metal oxides and / or metal hydroxides to the raw sugar, so that the pH value of the mixed raw sugar is 6.8-8.5, wherein , the metal is a Group IA or Group IIA metal element. The method provided by the invention can simply and conveniently adjust the pH value of the raw sugar, and significantly delay the deterioration of the quality of the raw sugar during storage without increasing the process.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a method for delaying the quality deterioration of raw sugar during storage. Background technique [0002] The existing sugar production mainly has two process routes: one-step sugar-making method and raw sugar-refining two-step sugar-making method. The one-step sugar production method is to directly produce white sugar from sugar cane or sugar beet. This method is mainly used for the production of ordinary white granulated sugar, while the preparation of low-cost and high-quality refined sugar requires a two-step sugar production method. The first step in the raw sugar-refining two-step sugar production method is to use sugar cane as raw material, after pressing, clarification, filtration, and crystallization to make raw sugar, and then the raw sugar is re-dissolved, processed, refined, and crystallized to make white sugar and Refined sugar. The two-step sugar producti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13B50/00
Inventor 耿勤车夏宁吴子毅王宝赵抒娜陈海军张菡
Owner COFCO GROUP
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