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Sugar bagging and Storage
Introduction
• Bins and Hopper
▫ Short duration
▫ Few hundred tons
• Short term bulk storage silo
▫ Tall cylindrical construction
▫ Capacity 1000 – 3000 tonnes
• Long term bulk storage silo
▫ Lower aspect ratio
▫ Capacity 20000- 80000 tonnes
• Bagged sugar warehouses
TYPES OF BULK SILO
• Generally vertical cylindrical silo store up to
80000 tonnes
• Vertical cylindrical silo - cost effective, less
space occupy
• Designs are differ in terms of construction
material, approach to insulation, sugar feed and
extraction mechanism
VERTICAL SILO
MATERIALS OF CONSTRUCTION
• Constructed usually using
▫ stainless steel,
▫ reinforced concrete,
▫ Epoxy lined mild steel and concrete
• Must be insulated – to avoid moisture migration
(avoid cake formation)
• Some time Silo have air pipe to flush out the moisture
Feed and discharge system
• Simplest approach- feeding a sugar at a apex of silo
which is fitted with a conical roof
• Disadvantage – dust formation and crystal damage
• Alternate way
▫ Slotted intermediate ceiling
⚫ Concrete circular slots
⚫ Uniform distribution but chance for crystal breakage
▫ Rotating screws
⚫ Discharge outward from center of the silo, shorter fall
distance
⚫ Costly
VENTILATION
• Air passage to the sugar is strongly
recommended
• Minimize the caking by carrying away excess
moisture
• Air humidity must below the Equilibrium
Relative Humidity of sugar
• Air dehumidify by chemical desiccant
VERTICAL SILO
1--> apex
2 --> bucket elevator
3 --> air inlet
4 --> Discharge opening
• Economic storage
• If space is not an issue
• Do not have side walls above 3 m
• Sugar is conveyed by a conveyor at the apex of
the roof
• Discharge by throw-off carriage, moving
conveyor at a bottom
• Draw back: sugar exposed to more air
FRAME SILO
FRAME SILO
SUGAR AND PACKAGING
• Sugar packaged into sacks, bags
• Size range few grams to 1000 kg
• Retail pack 1 kg and 2 kg
• Equipment components
▫ Weigher and Feeder
▫ Packaging material
▫ Forming , filling and sealing
WEIGHER AND FEEDERS
• Oldest and simplest method
▫ Bags stand on the scale and its filled by manually
▫ Sticky brown sugar- best
❑Automatic filling method
❑Vertical feeder used for less stick and free flowing sugars
❑Vertical tube containing rotating screw/ augur which
delivers a known volume of sugar
❑Volume can be adjusted by no.of revolutions
PACKAGING MATERIALS
• Sugar is packed in
▫ Jute
▫ Jute sacks with poly ethylene liners
▫ Single and multi ply paper - good strength
▫ Poly ethylene – cheaper, product visibility,
moisture impermeability
▫ Poly propylene
▫ Woven poly ethylene and propylene
▫ Kraft paper
PACKAGING MATERIAL CONSIDERATION
• Ability to prevent moisture migration
• Material have low moisture vapour transmission
characteristics
• Must be food grade
• Inks and glues used in packaging material must
be food grade
• Packaging material from store must be clean (ie.
No dust)
Multiply paper packs Jute Sacks
Kraft paper
FORMING, FILLING AND SEALING
• Two machine types
1. machines that use pre made bags – which are
opened and presented to the weighter discharge,
filled , folded and sealed
2. Machine uses paper from reel form a bag , then it
is filled , fold and sealed
Sugar bagging and storage
Sugar bagging and storage

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Sugar bagging and storage

  • 2. Introduction • Bins and Hopper ▫ Short duration ▫ Few hundred tons • Short term bulk storage silo ▫ Tall cylindrical construction ▫ Capacity 1000 – 3000 tonnes • Long term bulk storage silo ▫ Lower aspect ratio ▫ Capacity 20000- 80000 tonnes • Bagged sugar warehouses
  • 3. TYPES OF BULK SILO • Generally vertical cylindrical silo store up to 80000 tonnes • Vertical cylindrical silo - cost effective, less space occupy • Designs are differ in terms of construction material, approach to insulation, sugar feed and extraction mechanism
  • 5. MATERIALS OF CONSTRUCTION • Constructed usually using ▫ stainless steel, ▫ reinforced concrete, ▫ Epoxy lined mild steel and concrete • Must be insulated – to avoid moisture migration (avoid cake formation) • Some time Silo have air pipe to flush out the moisture
  • 6. Feed and discharge system • Simplest approach- feeding a sugar at a apex of silo which is fitted with a conical roof • Disadvantage – dust formation and crystal damage • Alternate way ▫ Slotted intermediate ceiling ⚫ Concrete circular slots ⚫ Uniform distribution but chance for crystal breakage ▫ Rotating screws ⚫ Discharge outward from center of the silo, shorter fall distance ⚫ Costly
  • 7. VENTILATION • Air passage to the sugar is strongly recommended • Minimize the caking by carrying away excess moisture • Air humidity must below the Equilibrium Relative Humidity of sugar • Air dehumidify by chemical desiccant
  • 8. VERTICAL SILO 1--> apex 2 --> bucket elevator 3 --> air inlet 4 --> Discharge opening
  • 9. • Economic storage • If space is not an issue • Do not have side walls above 3 m • Sugar is conveyed by a conveyor at the apex of the roof • Discharge by throw-off carriage, moving conveyor at a bottom • Draw back: sugar exposed to more air FRAME SILO
  • 11. SUGAR AND PACKAGING • Sugar packaged into sacks, bags • Size range few grams to 1000 kg • Retail pack 1 kg and 2 kg • Equipment components ▫ Weigher and Feeder ▫ Packaging material ▫ Forming , filling and sealing
  • 12. WEIGHER AND FEEDERS • Oldest and simplest method ▫ Bags stand on the scale and its filled by manually ▫ Sticky brown sugar- best ❑Automatic filling method ❑Vertical feeder used for less stick and free flowing sugars ❑Vertical tube containing rotating screw/ augur which delivers a known volume of sugar ❑Volume can be adjusted by no.of revolutions
  • 13. PACKAGING MATERIALS • Sugar is packed in ▫ Jute ▫ Jute sacks with poly ethylene liners ▫ Single and multi ply paper - good strength ▫ Poly ethylene – cheaper, product visibility, moisture impermeability ▫ Poly propylene ▫ Woven poly ethylene and propylene ▫ Kraft paper
  • 14. PACKAGING MATERIAL CONSIDERATION • Ability to prevent moisture migration • Material have low moisture vapour transmission characteristics • Must be food grade • Inks and glues used in packaging material must be food grade • Packaging material from store must be clean (ie. No dust)
  • 15. Multiply paper packs Jute Sacks
  • 17. FORMING, FILLING AND SEALING • Two machine types 1. machines that use pre made bags – which are opened and presented to the weighter discharge, filled , folded and sealed 2. Machine uses paper from reel form a bag , then it is filled , fold and sealed