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Method for treating refined sugar ion-exchange waste liquid

A technology of refined sugar and separation, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., to achieve the effects of reducing wastewater treatment pressure, saving costs, and good treatment effects

Inactive Publication Date: 2016-12-07
云南省轻工业科学研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies in the prior art, and provide a method for treating the separation and separation waste liquid of refined sugar. The direct discharge of separation wastewater brings great pressure to the environment, and also overcomes the limitations in practical applications

Method used

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  • Method for treating refined sugar ion-exchange waste liquid
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  • Method for treating refined sugar ion-exchange waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for treating refined sugar separation waste liquid, which is to filter the refined sugar separation waste liquid through a plate and frame filter to remove suspended impurities, and then enter the filtrate into a nanofiltration device for treatment to obtain a permeate and a concentrate; the obtained permeate The superfluid can directly elute and regenerate the ion exchange resin used for the decolorization of refined sugar.

[0025] The pH of the purified sugar separation waste liquid is 11.8;

[0026] The nanofiltration membrane in the nanofiltration device is hydrophilic, and the material of the nanofiltration membrane is polyamide; the nanofiltration membrane adopts 1812 roll-type membrane modules; the molecular weight cut-off of the nanofiltration membrane is greater than 300Da and less than 800Da;

[0027] The maximum operating pressure of the nanofiltration device is 2.0MPa.

[0028] The temperature of the refined sugar separation waste liquid is 20°C. ...

Embodiment 2

[0030] A method for treating refined sugar separation waste liquid, which is to filter the refined sugar separation waste liquid through a plate and frame filter to remove suspended impurities, and then enter the filtrate into a nanofiltration device for treatment to obtain a permeate and a concentrate; the obtained permeate The superfluid can directly elute and regenerate the ion exchange resin used for the decolorization of refined sugar.

[0031] The pH of the purified sugar ionization waste liquid is >11, and the pH is ≤12.

[0032] The nanofiltration membrane in the nanofiltration device is hydrophilic, and the material of the nanofiltration membrane is polyamide; the nanofiltration membrane adopts 1812 roll-type membrane modules; the molecular weight cut-off of the nanofiltration membrane is greater than 300Da and less than 800Da;

[0033] The maximum operating pressure of the nanofiltration device is 3.0MPa.

[0034] The temperature of the refined sugar separation wast...

Embodiment 3

[0036] A method for treating refined sugar separation waste liquid, which is to filter the refined sugar separation waste liquid through a plate and frame filter to remove suspended impurities, and then enter the filtrate into a nanofiltration device for treatment to obtain a permeate and a concentrate; the obtained permeate The superfluid can directly elute and regenerate the ion exchange resin used for the decolorization of refined sugar.

[0037] The pH of the purified sugar separation waste liquid is >11;

[0038] The nanofiltration membrane in the nanofiltration device is hydrophilic, and the material of the nanofiltration membrane is polyamide; the nanofiltration membrane adopts 1812 roll-type membrane modules; the molecular weight cut-off of the nanofiltration membrane is greater than 300Da and less than 800Da;

[0039] The maximum operating pressure of the nanofiltration device is 2.5MPa.

[0040] The temperature of the refined sugar separation waste liquid is 30°C. ...

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Abstract

The invention relates to a method for treating refined sugar ion-exchange waste liquid and belongs to the technical field of light chemistry. The method comprises the steps that refined sugar ion-exchange waste liquid is filtered with a sheet frame filtering machine to remove suspended impurities, filter liquid enters a nanofiltration device to be treated, and permeation liquid and concentrated liquid are obtained, wherein the pH of the refined sugar ion-exchange waste liquid is larger than 11, a nanofiltration membrane in the nanofiltration device is hydrophilic and is made of polyamide, a 1812 roll type membrane assembly is adopted for the nanofiltration membrane, the molecular weight cut-off of the nanofiltration membrane is larger than 300 Da and smaller than 800 Da, and the maximum operation pressure of the nanofiltration device ranges from 2.0 MPa to 3.0 MPa. By means of the method, the purification recycling rate reaches 80% or above, and the pigment interception reaches 98% or above; permeation liquid passing through the membrane can be directly returned to the main process to be reused without treatment; as eluent obtained after regeneration mainly contains sugar and salt, the eluent can be recycled into the main process without contamination; meanwhile, the using amounts of a regeneration reagent and washing water are greatly reduced, and wastewater treatment pressure is relieved.

Description

technical field [0001] The invention belongs to the technical field of light chemical industry, and in particular relates to a method for treating refined sugar separation and separation waste liquid, in particular to a technology for treating refined sugar separation and regeneration alkaline waste water by using nanofiltration membrane technology. Background technique [0002] The refined sugar production process mainly uses carbonaceous adsorbents or ion exchange resins for decolorization. At present, refined sugar factories mainly use ion exchange resins for decolorization, and the decolorized resins are eluted and regenerated with salt and strong alkali solutions. Therefore, the regenerated decolorizing solution mainly contains some regenerants (sodium chloride and sodium hydroxide) that are not used by the resin and the original colored substances of the eluted syrup, which have the characteristics of high salt content, high alkalinity, and deep color value. The colore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02
CPCC02F1/00C02F1/442
Inventor 何亮亮高正卿何桂源陈勇和智明周力平邓涛王国梅
Owner 云南省轻工业科学研究院有限公司
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