1. Heat Source System
High-Temperature Heat Pump Unit
Two-stage scroll compressor (Copeland or Danfoss)
Refrigerant: R134a environmentally friendly
Heating temperature range: 40-85℃
COP value: 4.0-4.5 (at 55℃ condition)
Auxiliary Heating System
Stainless steel electric heating tubes (316 material, adjustable power)
Or gas-assisted heating system (optional)
Heat Exchange System
Plate heat exchanger: 316L stainless steel, efficiency ≥85%
Finned tube heat exchanger: Hydrophilic aluminum fins, copper tubes
2. Drying Chamber System
Structural Frame
Main frame: Hot-dip galvanized steel, thickness ≥2.5mm
Reinforcement: 50×50×2.0mm square tube, 600mm spacing
Insulation System
Material: Polyurethane foam, density ≥45kg/m³
Thickness: 200mm
Thermal bridge treatment: Special break design
Inner Liner System
Material: 316 stainless steel plate, thickness 1.2mm
Seam treatment: TIG welding, polishing
Sealing System
Door seal: Silicone rubber double seal, temperature resistance 250℃
Penetration sealing: Special high-temperature sealant
3. Air Circulation System
Ventilation Unit
Fan type: Backward inclined centrifugal fan
Material: Aluminum alloy impeller, stainless steel volute
Air volume: 20000-50000m³/h (adjustable)
Pressure: 800-1200Pa
Duct System
Main duct: 1.0mm galvanized steel, reinforced
Air distributor: Adjustable guide vanes
Filter: G4 primary + F7 medium two-stage filtration
Drive System
Motor: EC permanent magnet synchronous motor, IP55 protection
Transmission: Direct drive, maintenance-free design
4. Intelligent Control System
Hardware Configuration
PLC: Siemens S7-1500 series
HMI: 10.4" color touch screen (1280×800 resolution)
I/O modules: PROFINET bus connection
Sensor System
Temperature sensors: PT100, accuracy ±0.1℃
Humidity sensors: Capacitive type, accuracy ±1.5%RH
Moisture sensors: Online infrared detection, accuracy ±0.5%
Actuators
Electric control valves: Precision actuators, 4-20mA control
Frequency converters: Vector control, accuracy 0.01Hz
5. Heat Recovery System
Heat Pipe Exchanger
Material: Copper tube aluminum fin
Efficiency: 60-70%
Pressure drop: ＜100Pa
Plate Heat Exchanger
Material: 316 stainless steel
Heat transfer area: Configured by air volume
Self-cleaning design
6. Safety Protection System
Temperature Protection
Three-level over-temperature protection: Sensor + mechanical thermostat + fuse
Temperature difference protection: Alarm when difference >10℃
Electrical Protection
Overload protection: Electronic + thermal magnetic dual protection
Earth leakage protection: 30mA sensitivity
Phase sequence protection: Automatic correction
Mechanical Protection
Fan vibration monitoring: Alarm when vibration velocity >4.5mm/s
Conveyor deviation detection: Automatic correction device
