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Precision Humidity Control MDF Drying Production Line

This production line is specifically designed for the Medium Density Fiberboard (MDF) manufacturing process, aiming to efficiently and stably dry wet fiber (initial moisture content 40%-60% from the refiner) to the target moisture content (9%-11%). The system employs pneumatic flash tube drying technology and integrates online moisture feedback with closed-loop control, ensuring that the moisture content of the dried fiber fluctuates within a very narrow range. This significantly improves the stability of subsequent gluing and hot-pressing processes, as well as the final board quality.


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Brand:
MINGHUNG

Product Description

Precision Humidity Control MDF Drying Production Line

Working Principle

Wet fiber continuously enters the high-velocity hot air duct through a rotary valve, where it is dispersed and suspended in the turbulent hot airflow. The hot air (160°C – 220°C) transfers heat to the fiber, causing internal moisture to evaporate rapidly. The dried fiber, along with the humid air, enters a cyclone separator, where centrifugal force separates the dried fiber from the moist air. The separated fiber settles into a storage bin for later use, while the exhaust air is purified and released or partially recirculated back to the heating system. Built-in humidity sensors provide real-time feedback to adjust feed rate or air temperature, achieving precise moisture content control.

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Main Components

1. Biomass/Gas Hot Gas Generator : Provides high-temperature drying medium

2. High-Precision Rotary Feeder : Meters feed rate and prevents air backflow

3. Long-Life Drying Duct : With thermal insulation and spark detection ports

4. Online Moisture Sensor : Real-time fiber moisture feedback

5. High-Efficiency Cyclone Separator : Gas-solid separation

6. Induced Draft Fan and Exhaust Treatment System : Maintains negative pressure and purifies exhaust air

7. PLC Automatic Control System : Interlocked control of temperature, moisture, and feed rate

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Product Packaging

Rotary drum dryer for OSB MDF PB production

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Application Video

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Core Advantages

Precision Humidity Control: Online sensors + PLC closed-loop adjustment keeps outlet fiber moisture content stable within ±1%

High Energy Efficiency: Optional exhaust gas recirculation reduces heat loss by over 30%

Operational Safety: Equipped with spark detection and automatic water spray fire suppression system, greatly reducing fire risk

Strong Adaptability: Can handle fibers with different inlet moisture contents; suitable for MDF, particleboard, and other wood-based panels

Easy Maintenance: Optimized duct structure prevents material buildup; convenient access doors for inspection

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Main specifications and parameters

Parameter	Range
Oven-dry fiber capacity	5 – 35 t/h
Inlet fiber moisture content	40% – 60%
Outlet fiber moisture content	9% – 11% (adjustable)
Humidity control accuracy	±1%
Hot air temperature	160°C – 220°C
Drying duct length	80 – 150 m
System pressure drop	3000 – 5000 Pa
Thermal energy consumption	3800 – 4200 kJ/kg water evaporated
Control method	Fully automatic PLC + HMI touch screen