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Device and process for treating membrane filtration concentrated liquor generated in membrane based sugar production

A treatment process and technology for concentrated liquid, which are applied in the production of sucrose, sugar production, purification of sugar juice, etc., can solve the problems of reducing the economic benefits of sugar mills, environmental pollution, etc., and achieve easy operation, improved economic benefits, and rich organic matter content. Effect

Pending Publication Date: 2016-08-24
广西尚唐高科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Membrane filtration concentrate contains not only finely crushed bagasse, soil, starch, polysaccharides, proteins, and macromolecular pathogenic bacteria and other harmful substances that affect the production of white sugar from sugarcane, but also contains more sucrose. If the concentrate is discharged directly, it will not only It will greatly reduce the economic benefits of the sugar factory, and will also cause serious environmental pollution problems

Method used

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  • Device and process for treating membrane filtration concentrated liquor generated in membrane based sugar production
  • Device and process for treating membrane filtration concentrated liquor generated in membrane based sugar production
  • Device and process for treating membrane filtration concentrated liquor generated in membrane based sugar production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A treatment process for membrane-based sugar membrane filtration concentrate, comprising the steps of:

[0024] Take 1m of the membrane filtration concentrate with a volume concentration multiple of 10 3 , add milk of lime of 10°Be to the membrane filtration concentrate for the first time to adjust the pH to 7.0, then heat it to 45°C for the first time, then add milk of lime of 10°Be for the second time to adjust the pH to 11.2; Infuse carbon dioxide gas until pH = 8.3; add milk of lime for the third time to adjust pH to 11.2; pass in carbon dioxide gas for the second time until pH = 8.3; secondly heat to 70°C, and add 20kg sugar factory bagasse as a filter aid , stirred evenly, and pumped to a filter press for filtration to obtain filtrate and filter cake. In this embodiment, the total amount of milk of lime added is 1.6% of the weight of the membrane filtration concentrated solution.

[0025] The specific operation of the plate and frame filter press process is: pum...

Embodiment 2

[0032] Membrane sugar production and membrane filtration concentrated liquid treatment process, including the following steps: add milk of lime at 10 ° Be to the membrane filtered concentrated liquid with a volume concentration of 10 for the first time to adjust the pH to 7.0, and then heat it to 45 ° C for the first time, Then add milk of lime at 10°Be for the second time to adjust the pH to 11.2; for the first time, add carbon dioxide gas until pH = 8.3; add milk of lime for the third time to adjust the pH to 11.2; Heating to 70°C for the second time, adding 1.5% sugar bagasse as a filter aid, stirring evenly, and pumping to a filter press for filtration to obtain filtrate and filter cake.

[0033] The specific operation of the plate and frame filter press process is: pump the heated and saturated material after adding filter aids to the plate and frame filter press for press filtration. The sugar content of the filter cake is washed with water, the water temperature is 55°C...

Embodiment 3

[0038] Membrane sugar production and membrane filtration concentrated liquid treatment process, including the following steps: add milk of lime at 10 ° Be to the membrane filtered concentrated liquid with a volume concentration of 10 for the first time to adjust the pH to 7.0, and then heat it to 45 ° C for the first time, Add milk of lime at 10°Be for the second time to adjust the pH to 10.5; for the first time, pass carbon dioxide gas until pH = 8.3; add milk of lime for the third time to adjust the pH to 10.5; pass carbon dioxide gas for the second time until pH = 8.3 Heating to 70°C for the second time, adding 2% sugar bagasse as a filter aid, stirring evenly, pumping to a filter press for filtration, and obtaining filtrate and filter cake.

[0039] The total addition of the milk of lime is 1.3% of the concentrated solution weight in step (1).

[0040]The specific operation of the plate and frame filter press process is: pump the heated and saturated material after adding ...

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Abstract

A method for treating membrane filtration concentrated liquor generated in membrane based sugar production includes steps: adding lime milk into the membrane filtration concentrated liquor for the first time to adjust pH to 7.0-7.5, heating for the first time to 45-55DEG C, and adding the lime milk for the second time to adjust pH to 10.5-11.4; feeding carbon dioxide gas for the first time until pH reaches 8.2-8.4; adding the lime milk for the third time to adjust pH to 10.5-11.4; feeding the carbon dioxide gas for the second time until pH reaches 8.2-8.4; heating for the second time to 70-80DEG C, adding a filter aid, well stirring, sending to a filter press, and filtering to obtain filtrate and filter cakes. The method has advantages of simple process, easiness in operation, low equipment input, low energy consumption, low filter aid cost, freeness of environment pollution and the like. The filtrate can be directly used for sugar production, so that the economic benefit in membrane clarification based sugar production is increased; the filter cakes are rich in organic content and can serve as a raw material of organic fertilizers.

Description

technical field [0001] The invention relates to the field of sugar cane sugar production, in particular to a process and device for treating concentrated liquid of membrane filtration membrane sugar production by membrane method. Background technique [0002] Guangxi is the main sugar production area in my country, and its output accounts for more than 60% of the country's total. At present, Guangxi sugarcane sugar factories mainly use the sulfurous acid method to produce white granulated sugar. This process requires sulfur dioxide gas produced by sulfur combustion as a clarification aid, so white granulated sugar products A certain amount of sulfur dioxide remains in the GB317-2006 (white granulated sugar) standard stipulates that the residual sulfur dioxide of premium white granulated sugar is ≤15mg / kg. Therefore, the residual sulfur in these white sugar products greatly affects the quality improvement and application range expansion of white sugar. [0003] Membrane sepa...

Claims

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Application Information

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IPC IPC(8): C13B20/16C13B20/02C13B20/00
CPCC13B20/005C13B20/007C13B20/02C13B20/16
Inventor 徐勇士周昊
Owner 广西尚唐高科技有限公司
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