Method for regenerating sugar making decolorized and decalcified resin and method for recycling regeneration waste liquid

A technology for decolorizing resin and resin regeneration, which is applied to the cleaning of sugar juice or syrup of ion exchange resins, the regeneration of resin and the reuse of waste liquid, which can solve the problems of refining syrup in the secondary cleaning process, environmental pollution of regeneration waste liquid, The effect of syrup is limited and other problems, to achieve the effect of improving syrup quality, reducing scaling, and saving evaporation energy

Active Publication Date: 2011-04-27
广东华糖实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The cost of physical methods such as microfiltration, ultrafiltration, nanofiltration and activated carbon used in the cleaning process of sugar production is relatively high, and it is difficult to industrialize;
[0005] (2) The improvement of traditional cleaning methods such as sulfurous acid method and phosphoric acid flotation method cannot cancel the secondary cleaning process to produce refined syrup;
[0006] (3) The use of bagasse and other sugar factory waste to clean syrup has limited effect; the use of chemical detergents for sugar cleaning or clarification may have sugar safety issues;
[0007] (4) Restricting the use of ion exchange resin in the decolorization and desalination process of sugar production is still the environmental pollution problem of regeneration waste liquid

Method used

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  • Method for regenerating sugar making decolorized and decalcified resin and method for recycling regeneration waste liquid
  • Method for regenerating sugar making decolorized and decalcified resin and method for recycling regeneration waste liquid

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Embodiment 1

[0030] Such as figure 1 Shown, the regeneration of sugar decolorization and decalcification resin and the reuse method of regeneration waste liquid comprise the following steps: (1) decolorization of syrup or sugar juice; (2) regeneration of decolorization resin; (3) decolorization of sugar clear juice calcium; (4) regeneration of decalcified resin; (5) preparation of calcium-rich pigment by concentration and drying method. Specific steps are as follows:

[0031] (1) Decolorization of syrup: Fill 25L strong base anion exchange resin D201×7 in the ion exchange column (Φ0.15m×2.00m), and the resin uses 2BV mass fraction of 4% NaOH solution to circulate through the resin at a flow rate of 2BV / h bed treatment (i.e. circulation treatment, the same below) for 1 hour, backwash the resin bed with demineralized water until the effluent pH value is 8.0 to 9.0, then use 2BV volume fraction of 4% HCI solution to circulate for 1 hour at 2BV / h, and then wash with demineralized water until ...

Embodiment 2

[0038] The difference between this embodiment and embodiment 1 is:

[0039] Change the syrup in step (1) to beet sugar factory second-clear juice, its hammer, temperature and processing capacity are 15°Bx, 70°C and 3250L (i.e. 130BV) respectively, the injection flow rate is 10BV / h, and the second-clear juice is decolorized Later used for sulfur bleaching. At this time, the decolorization rate of the second clear juice is greater than 75.0%.

[0040] Adjust the alkaline saline regenerant in step (2) to a mixed solution of 80g / L NaCl and 1g / L NaOH, and the temperature and dosage of the regenerant are 60°C and 750L, ie 30BV, respectively. At this time, the regeneration rate of the decolorized resin was 98.7%.

[0041] Ca is used in step (3) 2+ The content is 300mg / L (calculated as CaO) of beet sugar factory second clear juice, the processing capacity is 120BV (3000L), the temperature is 85°C, and the flow rate is 12BV / h. At this time, the decalcification rate of Erqing Juice ...

Embodiment 3

[0046] The difference between this embodiment and embodiment 1 is:

[0047] Change the syrup in step (1) into the evaporated syrup of the sulfite method sugarcane sugar factory, the hammer, temperature and processing capacity after dilution are 50°Bx, 80°C and 1000L (ie 40BV) respectively, and the feed flow rate is 3BV / h, the syrup is decolorized and used for evaporating and boiling sugar. At this time, the decolorization rate of syrup is greater than 81.0%.

[0048] Adjust the alkaline salt water regeneration agent in step (2) to a mixed solution of 96g / L NaCl and 3g / L NaOH, and the temperature and dosage of the regeneration agent are respectively 75°C and 600L or 24BV. At this time, the regeneration rate of the decolorized resin was 97.8%.

[0049] Ca is used in step (3) 2+ The content is 400mg / L (calculated as CaO) in the clear juice of the sulfitic cane sugar factory, the processing capacity is 90BV (2250L), the temperature is 80°C, and the flow rate is 10BV / h. At thi...

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Abstract

The invention discloses a method for regenerating sugar making decolorized and decalcified resin, which comprises the following steps of: (1) decolorizing syrup or clear juice to obtain decolorized resin and decolorized syrup or clear juice; (2) regenerating the decolorized resin to obtain regenerated decolorized resin and decolorized resin regeneration waste liquid I; (3) decalcifying sugar making clear juice to obtain decalcified resin and decalcified clear juice; and (4) regenerating the decalcified resin, namely regenerating the decalcified resin by using the regeneration waste liquid I to obtain regenerated decalcified resin and decalcified resin regeneration waste liquid II. The invention also discloses a method for recycling the regeneration waste liquid II, which is used for preparing a calcium-rich pigment with anti-oxidation activity. The method is suitable for the cleaning or clarifying process of the syrup (juice) in a beet or cane sugar factory, is particularly suitable for decolorizing and decalcifying the sugar making clear juice and the syrup, has the main characteristics of reducing the using amount of a regenerant and the scaling of an evaporator, saving the evaporation energy of an evaporating pot, recycling non-sugar components in the syrup (juice), such as the pigment, calcium and the like, along with safe processing technology, and is environmental-friendly.

Description

technical field [0001] The invention relates to sugar juice or syrup cleaning technology using ion exchange resins in the sugar industry, in particular to resin regeneration and waste liquid recycling methods, and belongs to the field of sugar engineering. technical background [0002] In sugar clarification or cleaning process, due to the extensive use of lime and Ca 2+ The precipitation is not complete, and there is a lot of Ca in the clear sugar juice 2+ . Part of the residual calcium salt is precipitated in the form of calcium sulfite, calcium carbonate, calcium phosphate or calcium sulfate during evaporation and concentration, resulting in fouling of the evaporation tank and reducing heat transfer efficiency; Particles are built on the white sugar crystals, which will increase the ash content of the white sugar, increase the turbidity of the white sugar, and lower the grade; some will increase the honey making coefficient and reduce the sugar recovery rate. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/14C09B61/00A23L1/275A23L1/30B01J49/00A23L5/49A23L29/30B01J49/60
Inventor 朱思明陈志江于淑娟杨永军何瑞雪
Owner 广东华糖实业有限公司
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