Steam-Type Low-Cost Operation Plywood Drying Machine

Product Description

Steam-Type Low-Cost Operation Plywood Drying Machine

This Steam-Type Low-Cost Operation Plywood Drying Machine is designed for plywood manufacturers seeking high cost-effectiveness and stable production. It efficiently utilizes the thermal energy from a factory's existing steam boiler (or can be paired with a small steam generator), converting steam heat into stable drying hot air through an efficient heat exchange system. The equipment employs a scientific hot air circulation and dehumidification design to ensure even and efficient veneer drying. Its core features are low initial investment cost, economical operational energy consumption, and easy maintenance. It is particularly suitable for drying veneers from fast-growing wood species like poplar and eucalyptus, making it an ideal choice to help customers achieve capacity upgrades and quality control with minimal investment.

Working Principle

The equipment operates on the principle of efficient, forced convection hot air drying. The workflow is as follows:

1.  Heat Generation & Circulation: Saturated steam from the boiler enters the finned-tube heat exchangers inside the drying chamber. Fresh air is drawn through these exchangers, becoming clean, dry hot air. High-power circulation fans then forcefully drive this hot air throughout the chamber.

2.  Drying Process: The forced hot air uniformly penetrates the stacks of veneers. Heat and moisture exchange occurs, causing water to evaporate from the veneer surfaces.

3.  Humidity Control & Recycling: The resulting moist, hot air is partially exhausted through automatically controlled dehumidification vents to maintain the optimal humidity ratio. The remaining air mixes with a portion of fresh make-up air, returns to the heat exchangers for reheating, and re-enters the circulation, forming a closed-loop system that maximizes thermal efficiency.

Specification

Parameter	Value
Heating Sections	9 sections
Heating Motors	11kw*9pcs
Cooling Sections	1 sections
Cooling Motors	4kw*2pcs
Conveyor Motors	7.5kw*4pcs
Total power	137kw
Conveyor Speed	1-20m/Min
Heating medium	Oil/Steam
Drying temperature	150-180℃
Veneer Thickness	1-3mm
Original Veneer Humidity	60%
Dryed Veneer Humidity	5-10%
Drying capacity	55-60m³/20h

Core Components

1.  Steam Heat Exchange System: The core component, including finned-tube heat exchanger banks, steam regulating valves, and steam traps, responsible for efficiently converting steam thermal energy into drying hot air.

2.  Drying Chamber Main Body: Constructed with insulated color steel sheets or brick-concrete structure, featuring internal air ducts designed for optimal airflow. It provides excellent sealing and insulation to minimize heat loss.

3.  Hot Air Circulation System: Composed of heat and moisture-resistant circulation fans, air ducts, and guide vanes to ensure uniform distribution of air velocity, temperature, and humidity within the kiln.

4.  Ventilation and Dehumidification System: Includes air inlets, outlets, and automatic/manual dampers for controlling the humidity of the drying medium.

5.  Veneer Loading System: Typically lightweight drying carts with stickers or simple forklift racks for easy loading and unloading.

6.  Intelligent Control System: Optional PLC or microprocessor control system for automatic monitoring and control of drying temperature, humidity, and time, ensuring process stability.

Advantages of MINGHUNG Dryer

   Very Low Operating Cost: Directly utilizes factory surplus steam or low-cost steam, resulting in low thermal energy unit costs and significantly lower operating expenses compared to thermal oil and some electric heating methods.

   Low Investment Threshold: Relatively simple equipment structure leads to lower manufacturing costs and initial investment compared to complex drying systems of similar scale.

   Stable Drying Quality: Stable steam heat source, easy to control. Combined with a uniform circulation system, it ensures even moisture content in dried veneer and reduces warping.

   Safe and Reliable: The steam heat exchange system operates at low pressure with no open flame, ensuring high operational safety.

   Easy Maintenance: Simple system structure. Key components (e.g., heat exchangers, fans) are durable, with straightforward daily maintenance and low repair costs.

   Strong Flexibility and Adaptability: Particularly suitable for factories with existing steam boilers looking to expand capacity, or for providing a complete, low-cost start-up solution ("boiler + dryer") for new small and medium-sized factories.

Applications

   Suitable for drying rotary-cut veneers from common fast-growing wood species like poplar, eucalyptus, and pine.

   Widely used in producing plywood types sensitive to cost control, such as construction formwork, furniture back panels, and packaging boards.

   The preferred drying equipment for small and medium-sized plywood factories and woodworking workshops seeking capacity upgrades or new production lines.

   Ideal for factories with biomass boilers (using wood waste like chips and offcuts) or other steam sources, enabling efficient recycling and utilization of energy.

Company Profile

Shandong MINGHUNG Wood Based Panel Machinery Co.,Ltd

We are  China factory and manufacturer of full sets of Plywood machinery and Veneer machinery. 

Machines include:Veneer production line(Log debaker,Veneer peeling machine, Log loader,Automatic stacker),Blade sharpener,Veneer patching machine,Veneer dryer machine(Veneer roller dryer, Veneer mesh dryer, Veneer press dryer), Veneer gluing machine,Plywood lay-up machine, Veneer jointing machine, Plywood cold press, Hot press machine,Plywood edge trimming cutting machine, Sanding and calibrating machine, Plywood overturn machine, Lift table, and so on.

FAQ

Q1: We don't have a steam boiler. Can we use this dryer?

A1: Absolutely. We can provide a selection plan for a matching small steam generator (electric or biomass-fired) to form a complete drying system for you.

Q2: Compared to a thermal oil dryer, is the drying speed of the steam type slower?

A2: Within the standard drying temperature range (60-120°C), drying speed primarily depends on hot air temperature, humidity, and circulation efficiency. Steam dryers can fully achieve efficient drying rates within this range. Their advantage lies in lower operating costs, making them particularly suitable for fast-growing wood veneers that do not require drying temperatures exceeding 120°C.

Q3: How does the equipment control the final moisture content of the veneer?

A3: The basic model controls the drying process indirectly by regulating temperature via steam valves and manually/automatically controlling dehumidification. We highly recommend opting for the PLC automatic control model. It can automatically adjust temperature and dehumidification based on preset drying schedules, providing more precise control over moisture content and ensuring batch-to-batch consistency.

Q4: Are there any special requirements for the factory building to install this equipment?

A4: The main requirements are: 1) A solid and level floor foundation; 2) Sufficient space for equipment installation and operation (with access aisles around it); 3) Steam supply and condensate return pipelines routed to the vicinity of the equipment; 4) Good ventilation in the workshop. We will provide detailed site preparation guidance.

For more information, welcome contact us, we will reply you quickly and offer working videos with you.