sugar_cane_mills_control.pdf

7/21/2019 sugar_cane_mills_control.pdf

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Juce Extraction ontrol

Milling Plant Controls

Cane Preparation

Cane Conveyors Speed and Syncronism Knives and Shredders Protection Imbibition Control Floating of Superior Roll Pol Extraction


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Cane Reception and Preparation



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Cane Reception and Preparation

Cane Weighing. Agricultural and Industrial Control Sampling. Payment System by Pol Cane Unloading and Storage. Losses Cane Washing. Feeder Tables Cane Conveyors

Levellers Knives Shredders



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PICADOR DESFIBRADOR

ELETROIMMESAALIMENTADORA

ESTEIRARPIDA

SHUTEDONELLY

1oTERNO

ESTEIRA METLICACANA

Preparing the Cane

Shredder



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Pantamoledora



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Pantamoledora



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Juce Extraction

Mills

Diffuser


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Pantamoledora


The cane juice extraction for the sugar production can be doneby mills or diffusers The mill tandem is composed generally of 4 to 7 mill units Each unit is a set of 3 rolls. Sometimes exists a fourth roll that

executes the forced feeding Its actioning is provided by steam turbines, electric motors or

hydraulic devices


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Mlls


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Pantamoledora


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Pantamoledora


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Pantamoledora


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Pantamoledora


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Pantamoledora


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The imbibition may be simple or compound The quantity of water to be added to the cane is directlyproportional to the fiber content of the cane, between 200 to250% of fiber

As the value of the fiber is a difficult parameter to establish,generally is used 25 to 30% of the total weight of the cane The temperature is an important parameter. Never may exceed

the 65 C degrees due to the effect of dilution of wax and

dextrines There is a big commitment between the quantity of water addedto the cane to improve the extraction and the energic balanceof the total process

IMBIBITION


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Imbbtion

Pantamoledora

PRIMARYJUICE

SECONDARYJUICE

MIXEDJUICE

COMPOUND IMBIBITION

WATER

BAGASSE

CANE

ROTARYSIEVE

PERCOLATEDJUICE

BAGASSE

BAGASSE

POWDERTO THEROTARYFILTERS


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The motricity of the pol extraction process is the sugarconcentration difference among the broken cells and theimbibition juice

Directly acting over the extraction as well, are the pressure of

the mills, the temperature of the imbibition water, the fibercontent, the height of the cane mattress, etc The saccharose that cannot be recovered at the mills is a direct

loss. It goes to the boilers to be burned and never more can be

recovered

Pol Extraction


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80

70

60

50

40

30

20

10

0

%E

XTRA

CTION

1 2 3 4 5 a 6

MILLS SET

Extraction by Mills Set


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CANE

MIXED JUICE

BAGASSE

IMBIBITION

WATER

POL CONTENT IN FIBER

POL CONTENT IN JUICE

FIRSTMILL LASTMILL

The Juice Extraction Operation


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For each 1% of strange matter that enters to the sugar process,its lost 1,5 Kg of sugar by ton. of processed cane The preparation index defines the result of the preparing of the

cane to be crushed. 90% is a good index

For each unit of difference between the purity of the mixedjuice and the purity of the primary juice its lost 2,5 Kg of sugarby ton. of mixed juice entering at the factory

The extraction at the first mill must be between 50 to 70%

The humidity of the bagasse must be between 48 to 50% The pol of the bagasse at the end of the last mill must be as lowas posible. 2.0 is a good value

The mills area must be an aseptic place by the use of hot water,

steam and chemical products

Efficiency of Pol Extraction. Comments


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Better energic efficiency Control over the complete process Increase of the industrial efficiency Conspicuous improvement on sugar quality (color, humidity,

filter easibility, etc) Reduction in losses and acquaintance of what are its causes Increase of the accomplishment with the technological

standards for the sugar

Better condensate recovering at the heat interchanger devices Raising of the operators technical level More easibility for the maintenance tasks: the equipment are

being monitored

Results of the Automation (1)


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Possibility of establishing one operation strategy for everysituation of the factory without interference among the areas Centralization of the operation. Better taking of decision

process

Conspicuous increase of the real information of the process Better profit of the installed facilities Increase of the operators safety Allows the integration between the process and the laboratory

using the on-line analysis as a tool for the process operation Reduction in the energy consumption allowing one co-generation strategy



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Allows the installation of one Enterprise Management System,integrating the corporate and the process networks of the

company Increase on the capacity of the factory by the reduction in time

losses and by the increase of the industrial efficiency



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THANK YOU !!!!!!!!

sugar_cane_mills_control.pdf

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