Presentation1chetan Sugar

8/3/2019 Presentation1chetan Sugar

http://slidepdf.com/reader/full/presentation1chetan-sugar 1/19

Seminar on

“Manufacturing process of sugar

industry

andutilization of By-products of sugar

Industry”

By

Chetan P.Maski



Company profile:

The Mysore Sugar Company Limited is a government of

Karnataka enterprise.

The Maharaja of Mysore established the Mysore Sugar Company

in January 1933. And It was designed by Bharatha Ratna Sir M.

Vishveswaraiah.

This is the first sugar factory in karnataka state was built inMandya town, which is about 100km from Bangalore, on the way to

Mysore.

Company’s principal business activity is the manufacture of sugar

& alcohol. The company begins with 400 tones of milling plant,the factory

capacity was periodically expanded to the present 5000 tons per day.



Introduction:

Sugar industry is defined as industry which is involved in

the production of edible sugar from raw sugar cane and sugar beet.

Sugar is extracted from two raw materials,sugar cane & sugar beet.

Both taste the same & produce white sugar.

Sugar industry is seasonal industry , season for sugar cane is 12 to

22 weeks and 6 to 12 weeks for sugar beet.



Different stages in manufacturing process:

a) Planting and harvesting

b) Preparation & Processing

c) Juice extraction process

d) Purification of juice:-Clarification & evaporation

e) Crystallization

f) Centrifuging

g) Drying and packing



Fig 1: schematic of sugar extraction process



a) Planting and harvesting:

Sugar cane requires an average temperature of 24 degrees.

Black soil is essential.

The harvested cane stacks are loaded mechanically or physically

into trucks or tractors & taken to factory for processing.



b) Preparation & Processing:

After the sugar cane is arrived at sugar factory,it is unloadedphysically or mechanically by using cranes.

Then it is cleaned or washed.

Excessive soil are removed and the cane is ready to be milled.



c) Juice extraction process:

Heavily grooved crusher rollers break the cane & extract a

large part of juice.

Revolving knifes cuts the stalk into chips are supplementary to

the crusher.

The pressing process involves crushing the stalks between theheavy & grooved metal rollers to separate the bagasse.

As the cane is crushed, hot water (or a combination of hot

water and recovered impure juice) is sprayed onto the crushedcane counter currently as it leaves each mill for diluting.

Extracted juice contains 95% or more of the sucrose present.



d) Purification of juice:-

Clarification & evaporation

The clarification process is designed to remove both soluble andinsoluble impurities such as sand, soil, and ground rock,

The process employs lime and heat as the clarifying agents.

The lime is added to neutralize the organic acids, and thetemperature of the juice raised to about 95 degree.

The mud’s separate from the clear juice through sedimentation.

The final clarified juice contains about 85 percent water and has the

same composition as the raw extracted juice.



To concentrate the clarified juice, about two-thirds of the water is

removed through vacuum evaporation.

Evaporator stations consist of a series of evaporators, termed

multiple-effect evaporators; typically a series of four evaporators.

Steam from large boilers is used to heat the first evaporator, and the

steam from the water evaporated in the first evaporator is used to heat

the second Evaporator.

The evaporator station in cane sugar manufacture typically

produces a syrup with about 65 percent solids and 35 percent water.

Following evaporation, the syrup is clarified by adding lime,

phosphoric acid, and filtered in the clarifier.



e) Crystallization:

Crystallization takes place in a single stage vacuum pan.The syrup is

evaporated until saturated with sugar.

As saturation point has been exceeded,small grains of sugar are added

to pan.

Small grains are called SEED serve as nuclei for the formation of sugar

crystal.

The growth of sugar crystals continues until the pan is full.

When sucrose concentration reaches the desired level,dense mixture of syrup & sugar crystals are discharged into crystallizers.

Crystallization continues until syrup & crystals are stirred & cooled.



f) Centrifuging: The high speed centrifugal action used to separate the syrup and sugar

crystals into raw sugar crystals & molasses done in revolving machine

called centrifugals.

The machine has cylindrical basket suspended on a spindle,with

perforated sides lined with wire cloth inside with metal sheets.

Basket revolves at 1000 to 1800 RPM.

The raw sugar is retained in centrifuge basket & molasses passes

through the lining.

Once sugar is centrifuged, it is sent to a granulator for drying &remaining molasses is sent back to next pan.



g) Drying and packing:

Dump sugar crystals are dried by being tumbled through heated air

in a granulator.

Later crystals are sorted by size through vibrating screens and

placed in storage bin.

Then packing is done.



Case study

Utilization of By-Products



1. Cane residues left in the field after cane harvesting.

2. Bagasse from the cane crushing operation.

3. Pressmud from the cane juice filtration.4. Spent wash from distilleries.

The major waste products from sugar processing and

alcohol manufacture are:



USE OF BOGASSE IN PAPER MILLS

Bagasse finds profitable use in the paper industry for the

manufacture of wrapping and packing. Certain mills also

manufacture paper by employing suitable blends of conventional

pulp with that obtained from bagasse.

USE OF BOGASSE IN ELECTRICAL POWER GENERATION

The bagasse is burnt in the boilers for steam production. This

steam goes to some units of the process and rest goes to turbine forpower generation

The principal advantages lie in the good fuel characteristics of

bagasse and in the high uses of lowpressure steam within the plant.

In the sugar factory, the heat in low-pressure steam is used toperform such work as juice heating, evaporation and sugar boiling.



Press mud from the sugar mills is a very useful source of

fertilizer .

The bio-compost is produced by spraying spent wash onstacks of press mud called windrows. The period required to

produce usable fertilizer varies with the process used.



Conclusion:-With proper maintenance the factory can survive for long time

without any interruptions.

In sugar industry nothing will go waste, if raw materials,By-

products are properly utilized.

Productivity can be improved by controlling wastes like water,

steam etc.

With the help of co-generation plant power can be supplied to

near by village or electrical grid.

The press mud can be utilized by farmers as fertilizer.



THANK YOU

Presentation1chetan Sugar

Documents

Transcript of Presentation1chetan Sugar