Start of Part 2 STORAGE Concrete silos & steel bins Most - - PowerPoint PPT Presentation

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Start of Part 2 STORAGE Concrete silos & steel bins Most - - PowerPoint PPT Presentation

Feb 04, 2024 691 likes •912 views

Start of Part 2 STORAGE Concrete silos & steel bins Most common types of commercial grain storage structures Store large quantities of grain Relatively low cost Building life Up to & more than 100 years Variety

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Start of Part 2

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2

STORAGE

  • Concrete silos & steel bins
  • Most common types of commercial grain storage

structures

  • Store large quantities of grain
  • Relatively low cost
  • Building life
  • Up to & more than 100 years
  • Variety of sizes & configurations
  • Heights: 100 to 150 ft
  • Diameters: 20 to 100 ft
  • No such things as a “standard elevator”
  • Each client has different
  • Needs, requirements, opinions
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STORAGE

  • Number of grains
  • Material

movement through facility

  • Dust
  • Segregation
  • Identify

preservation

  • Flexibility
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4

RECLAIM SYSTEMS

  • Purpose
  • Remove grain from storage locations and transfer to shipping system

(loadout)

  • Design considerations
  • Equipment must be sized to meet loadout requirements
  • Typically ≥ 50,000 bu/hr
  • Bin-bottom & discharge design
  • Hopper-bottom (auto-cleanout)
  • Side draw vs. eccentric discharge vs. central discharge
  • Flat floor
  • Multiple discharges + final cleanout
  • Bin sweep augers vs. skid-steer loaders
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RECLAIM

Receiving Leg Reclaim Leg

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RECLAIM SYSTEMS

  • Effective storage volume
  • Affected by silo bottom
  • Cylindrical flat floor
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7

RECLAIM

  • Effective storage volume
  • Affected by type of silo bottom
  • Flat floor
  • Central discharge vs. side draw
  • Conical
  • CAD solid modeling essential
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RECLAIM SYSTEMS

40,000 BPH

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40,000 BPH

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LOADOUT SYSTEMS

  • Purpose
  • Transfer grain to shipping containers
  • Typically rail cars (sometimes trucks)
  • Design considerations
  • Equipment sized for speed and labor efficiency
  • Typically ≥ reclaim rate (≥ 50,000 bu/hr) – prevent delays
  • 110-car unit trains loaded in <15 hr; < 24 hr (railroad regulations & incentives)
  • Typical equipment used
  • Overhead surge bins with support structures vs. mechanical fill
  • Can be system bottleneck
  • Bulk weigh scales
  • Spouting with sampler & diverter
  • 3 common options
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11

LOADOUT SYSTEMS

  • 3 common types
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12

LOADOUT SYSTEMS

Gravity Mechanical Combination

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LOADOUT SYSTEMS

  • Unit train loading
  • Bulkweigher, spouting, reclaim/recycle from train
  • Size system to meet railroad requirements

Number

  • f

Train Cars 110 Car Size (ft3) 3500 4750 5160 CAR YARD Car Size (bu) 2812.464844 3816.916574 4146.376742 Bulkweigher Capacity (BPH) Fill (BPM) Start/End Tasks (min) Switching (min) Car Progression (min) Car Slack (min) Fill time/car (min) Fill time/car (min) Fill time/car (min) 50000 833.333333 60 30 2 2 3.37 4.58 4.98 60000 1000 60 30 2 2 2.81 3.82 4.15 70000 1166.66667 60 30 2 2 2.41 3.27 3.55 80000 1333.33333 60 30 2 2 2.11 2.86 3.11 Number

  • f

Train Cars 110 Car Size (ft3) 3500 4750 5160 LOOP TRACK Car Size (bu) 2812.464844 3816.916574 4146.376742 Bulkweigher Capacity (BPH) Fill (BPM) Start/End Tasks (min) Switching (min) Car Progression (min) Car Slack (min) Fill time/car (min) Fill time/car (min) Fill time/car (min) 50000 833.333333 0 2 2 3.37 4.58 4.98 60000 1000 2 2 2.81 3.82 4.15 70000 1166.66667 0 2 2 2.41 3.27 3.55 80000 1333.33333 0 2 2 2.11 2.86 3.11 Train Fill Time (h) 15.02 17.23 17.96 13.99 15.83 16.44 13.25 14.83 15.35 12.70 14.08 14.53 Train Fill Time (h) 13.52 15.73 16.46 12.49 14.33 14.94 11.75 13.33 13.85 11.20 12.58 13.03 3500 ft3 4750 ft3 5160 ft3

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ADDITIONAL THOUGHTS

  • Maintenance
  • Inspections
  • Operational flexibility
  • Cleaning
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ADDITIONAL THOUGHTS

  • Flexibility
  • Cleaning
  • Maintenance

Receiving Leg Reclaim Leg ?? ??

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ADDITIONAL THOUGHTS

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FACILITY DESIGN

  • Dynamic process
  • 5 main stages

Flow Diagram Bin Layout/Arrangement Bin Sizes/Capacities Facility Layout Process Design Primary Systems Secondary Systems Client Req. Building Codes Standards Structural Design Final Design

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FINAL THOUGHTS

  • Brief overview of design & operation considerations
  • Each commercial facility is unique
  • Many styles, layouts, and options
  • Many common features and equipment
  • Ultimately, design and operation based on owner preferences
  • But, knowledge of processes is extremely useful
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SLIDE 20

THANK YOU!

Any questions?

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