Mechanically harvested sugar cane mixing juice membrane cleaning pretreatment method

A technology of mixed juice and pretreatment, which is applied in the direction of purification by physical methods, purification by chemical products, and sucrose production, etc., can solve the problems of membrane fouling, unsustainable filtration, poor fluidity, etc., and achieves simple and safe operation and easy continuous production. , to ensure the effect of continuous operation

Inactive Publication Date: 2018-04-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sugarcane mixed juice pretreatment method announced by CN105063247A is only for suspended bagasse. If the sugarcane is harvested mechanized, once the soil brought by it enters the microfiltration membrane system, serious membrane pollution will occur, making the filtration unsustainable.
Even if a self-cleaning filter or centrifuge is installed before the membrane filtration system, some long fibers and pectin in the mixed juice will form a filter cake with extremely poor fluidity with the soil, and it is difficult to discharge it out of the system by backwashing or flushing with water, giving The continuous operation of the entire cleaning process brings great problems

Method used

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  • Mechanically harvested sugar cane mixing juice membrane cleaning pretreatment method

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Embodiment 1

[0039]First, the sugarcane mixed juice, which is mechanized harvested sugarcane as raw material, is pumped into the pretreatment system, and the high-frequency filter screen with a filter mesh precision of 40 mesh is used for dregs removal. Heat the filter to 45°C, adjust the pH value to 7.5 by adding alkali pump, and then enter the disc centrifuge to remove impurities, including suspended solids and soil, at a speed of 5000r / min. The machine filtrate enters the membrane system for clarification, decolorization, concentration and purification.

Embodiment 2

[0041] First, the sugarcane mixed juice, which is mechanized harvested sugarcane as raw material, is pumped into the pretreatment system, and the slag is removed by a rotary vibrating sieve with a filter mesh of 20 meshes. Heating to 60°C, adjusting the pH value to 7.2 by adding alkali pump, and then entering the automatic backwashing filter with a filter screen precision of 100 mesh to remove impurities, including suspended solids and soil, and the filter mud enters the plate and frame filter press to dehydrate and recover sugarcane juice. The filter filtrate enters the membrane system for clarification, decolorization, concentration and purification.

Embodiment 3

[0043] First, the sugarcane mixed juice, which is mechanized harvested sugarcane as raw material, is pumped into the pretreatment system, and the slag is removed by an ultrasonic vibrating sieve with a filter mesh of 80 meshes. Heating to 70°C, adjusting the pH value to 6.8 by adding an alkali pump, and then entering a scraper-type self-cleaning filter with a filter mesh of 200 meshes to remove impurities, including suspended solids and soil, and the filter sludge enters a drum vacuum filter for dehydration to recover sugarcane juice. The filter filtrate enters the membrane system for clarification, decolorization, concentration and purification.

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Abstract

The invention relates to the technical field of sugar production. According to the present invention, a sugar cane mixing juice is subjected to residue removing treatment by using a vibration sieve, the pH value of the filtrate of the vibration sieve is adjusted by heating and adding an alkali, the pH value adjusted filtrate enters a self-cleaning filter or a centrifuge system to remove impurities, and the filtrate of the filter or the centrifuge enters a membrane system; the method is suitable for the sugar cane mixing juice cleaning process using mechanically harvested sugar cane as a raw material, and has advantages of simple and safe operation, no chemical additive and easy continuous production; and the sugar cane mixing juice membrane cleaning pretreatment process uses the vibrationsieve-self-cleaning filter or the centrifuge two-stage integrated filtration technology, such that the grading separation of bagasse and soil in the sugar cane mixing juice is achieved, the problems of filtration mud agglomeration and filter clogging during the sugar cane mixing juice pretreatment are avoided, the continuous operation of the sugar cane mixing juice membrane cleaning process is ensured, and the pollution problem of the subsequent membrane system operation is significantly reduced.

Description

technical field [0001] The invention belongs to the technical field of sugar production, and relates to a method for pretreatment of sugarcane mixed juice, in particular to a method for cleaning pretreatment of sugarcane mixed juice by membrane method for mechanized harvesting. Background technique [0002] The existing sugarcane sugar production process includes sugarcane juice extraction, cane juice clarification and decolorization, scouring, crystallization and other steps. The clarification and decolorization effect of cane juice directly determines the quality of finished sugar. The traditional clarification and decolorization process is to add a large amount of lime and sulfur dioxide (sulfurous acid method) to the mixed juice, or add lime and carbonic acid gas (carbonic acid method), and then separate and precipitate to remove non-sugar impurities in the mixed juice to reduce the color value and turbidity. Therefore, a large amount of waste water, solid waste and by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/00C13B20/16
CPCC13B20/005C13B20/16C13B20/165
Inventor 罗建泉万印华杭晓风
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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