Wood chip/grain/straw belt dryer for steam boiler fuel

1. Design Requirements    Material: wood chips with various shapes, max size 50*50*50mm    Capacity: 3t/h    Moisture before drying: 50% (for design purpose, calculated as 60%)    Moisture after drying: 20%    Heat resource: flue gas    Tem

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1. Design Requirements

    Material: wood chips with various shapes, max size 50*50*50mm
    Capacity: 3t/h
    Moisture before drying: 50% (for design purpose, calculated as 60%)
    Moisture after drying: 20%
    Heat resource: flue gas
    Temperature of flue gas: 220ºC
    Drying method: 5 layers of belt
    Installation area: indoor
    Power: 380V, 50Hz, 3 phase 4 wires.

2.
 Design Calculation
    Dry material capacity: G dry=1200 kg/h
    Moisture evaporated: W=1800 kg/h
    Wet material capacity: G wet =3000 kg/h


3. Technical Parameters
    Model: DW5-18X2, belt 2m wide, 18m long, 5 layers
    Moisture evaporated: 5kg/m2·h
    Drying time: 1.5h-4.5h, adjustable
    Heating method: flue gas from boiler.
    Outer dimension of dryer: 18000*2800*3500

4. Processing

  1. The dryer includes 5 layers of stainless steel belts.
  2. Belts are supported by stainless steel pipes, with chains on both sides for driving purpose.
  3. Flue gas is supplied from the bottom of dryer, heating the material on layers one by one and finally discharged from the moisture discharge outlet.
  4. Material moves from the top layer to the 2nd, 3rd, 4th and 5th layers of belt, and discharged from the bottom outlet.
  5. The dryer works continuously.

5. Design Proposal

  1. Dryer: 18000*2800*3500mm, with belt 18000*2000mm, 5 layers. Valid drying area 180m2.
  2. Frame is made of Q235A steel, outer plate is 1.5mm carbon steel, inner seal plate 0.5mm.
  3. 50mm rock wool insulation.
  4. Blast fan 4-72-8C-37kw, flow 30834-36427m³/h, pressure 2754-2302Pa.
  5. Moisture discharge fan: Axial flow fan BT35-11.2-7.5kw, flow 53855m³/h, pressure 285.1Pa.
  6. Driving system: motor 4KW×1 unit, including reducer, 2.2KW×1 unit, including reducer.

 

Belt Dryer for Wood Chips/Grains/Straws for Fuel of Steam BoilerBelt Dryer for Wood Chips/Grains/Straws for Fuel of Steam BoilerBelt Dryer for Wood Chips/Grains/Straws for Fuel of Steam Boiler
 


 
 
 
 

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