Wood Drying Machine
RICHI wood drying machine is designed for rapid drying of various high-humidity materials and is widely used in cement, mining, building materials, chemicals, compound fertilizers and other industries. The equipment can dry the raw materials to about 15% moisture content and is suitable for chicken manure, cow dung, straw, forage, feed, coal, organic fertilizer and other materials.
This series of equipment has a reasonable structure and consists of a drum body, a feeding and discharging system, roller support, etc. It has the advantages of large processing capacity, high thermal efficiency, low energy consumption, and easy operation. It is an ideal solution for wet material processing.
Volume range: 6-150m³
Main motor power: 5.5-37KW
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What is a wood drying machine?
A wood drying machine, also known as a rotary drum dryer, is a type of heavy-duty industrial equipment designed to remove excess moisture from a wide range of raw materials—particularly biomass such as sawdust, wood chips, straw, grass, animal manure, and agricultural waste.
RICHI Machinery offers multiple types of drying equipment, including wood dryer machine, belt dryer machine, drying oven, and more. All drying systems can be customized based on customer requirements to match different production capacities and configurations for wood pellet factory and other biomass pellet plant applications.
A wood drying machine is commonly used in wood pellet production lines and organic fertilizer plants, helping to dry materials such as sawdust, wood chips, straw, grass, animal manure, and other high-moisture agricultural waste. By reducing moisture to less than 15%, the machine can ensure material stability, improve storage conditions, and increase processing efficiency. The drying system usually consists of a rotary drum, a heating source, an airflow system, and a feed/discharge mechanism. It is an essential pre-processing step in many biomass and environmental recycling industries.
In biomass energy applications, moisture control is critical because raw materials with high moisture content can reduce combustion efficiency, increase transportation costs, and affect pellet quality. Wood dryer machine provides a stable and continuous solution to these challenges, ensuring that raw materials are properly conditioned before entering the pellet machine or combustion system. Whether used on small farms or large industrial plants, wood dryer machines are a key link in the value chain for sustainable biomass utilisation.
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Application scope of wood drying machine
As an indispensable equipment in biomass and industrial processing production lines, wood chip dryer machines are designed to handle various types of materials and meet the drying needs of various industries. From raw agricultural waste to mineral residues, it ensures that the moisture content of the material is appropriately reduced before entering the next production stage. Below we will introduce the main applications of wood dryer machines from two aspects: applicable raw materials and application industry fields.
Sawdust, wood chips, bark and straw
Agricultural and forestry residues (such as leaves, bagasse, grass, coffee grounds)
Organic fertilizers (such as chicken manure, cow dung, poultry manure)
Industrial by-products such as sludge, clay, coal dust, limestone and slag
Raw materials suitable for wood drying machines
Industrial applications of wood drying machines
Biomass energy production (pellet fuel plants, briquette production)
Organic fertilizer processing (poultry and livestock manure processing)
Cement and building materials (drying of limestone, sand and clay)
Chemical and metallurgical industries (for drying ores, powders and composite materials)
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Working Principle of Wood Drying Machine
Wood chip dryer machine is widely used in various industrial drying scenarios due to its efficient, continuous, and stable operation characteristics. It often works in conjunction with upstream and downstream equipment such as the wood pellet mill machine in biomass pellet production lines. Below, we will briefly introduce its core structure and working principle to help you more intuitively understand how the equipment completes the material moisture removal process.
- Wood chip dryer machine usually consists of several main components: rotating drum (cylinder), feeding system and discharging system, induced draft fan, hot air furnace, transmission mechanism and specially designed lifting plate system.
- Its working principle is based on indirect heat exchange and material movement in a slightly inclined rotating drum. The wet raw material enters from the upper end of the drum, and the hot air or smoke enters from the lower end, forming a countercurrent drying process. As the drum rotates, the internal lifting plate constantly flips and lifts the material, causing it to fall into the hot air flow many times to ensure that the material is evenly heated.
- Under the combined action of rotation, gravity and hot air flow, the moisture evaporates rapidly and is discharged through the exhaust system. The dried material gradually moves downward and is discharged through the discharge port. This continuous and efficient drying process makes the rotary dryer ideal for processing high-moisture biomass materials such as sawdust, wood chips and agricultural waste.
0.6-1.8
Diameter (M)
6-24
Length (M)
3-12
Drum Speed (RPM)
1-3
Number of Layers
- Raw Material Feed Inlet
- Gear/Sprocket Guard
- External Insulation of Dryer Machine
- Riding Ring/Tire
- Raw Material Feed Outlet
- Drive Assembly
- Drive Assembly
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Drying process of wood drying machine
The rotary wood dryer machine adopts a three-layer concentric cylinder structure, and the material and hot air maintain parallel flow in the cylinder. The drying process is completed in turn through the inner cylinder, middle cylinder and outer cylinder, and each layer is equipped with a special shape of guide plate. After the material is lifted to a certain height by the baffle plate, it moves slowly along the spiral guide groove under the action of gravity and hot air to achieve sufficient heat exchange and drying.This drying system is a key pre-treatment step in a wood pellet line, ensuring the raw material reaches the ideal moisture content before pelletizing.
This three-cylinder rotary wood dryer machine is not only suitable for wood drying, but also widely used in the processing of man-made board raw materials such as agricultural and forestry waste, sawdust, river sand and non-metallic mineral powder. For materials with high moisture content and high viscosity, the self-cleaning rotary dryer adds an automatic cleaning device on the basis of traditional equipment. As the drum rotates, the material is constantly turned up, mixed and dried to ensure uniform drying effect.
At the same time, the automatic cleaning system can effectively remove attachments on the inner wall of the cylinder to prevent blockage and accumulation of materials. The dried product reaches the set moisture content and is discharged from the end of the equipment. The fine powder generated in the process is carried out with the hot air, collected and processed by the dust collector, and the purified waste gas is safely discharged into the atmosphere.
Technical features of RICHI wood drying machine
— Richi Machinery —
As a professional wood pellet dryer machine solution provider, RICHI wood dryer machine performs well in processing high-humidity sawdust, wood chips, bark, grass, and various agricultural and forestry wastes, biomass raw materials, organic fertilizers, and more. It is widely used in biomass energy, board manufacturing, organic fertilizer processing, and other fields. While ensuring excellent performance and durability, RICHI also offers competitive wood dryer machine price, making it a cost-effective choice for industrial drying applications. Its main technical advantages include:
1. Wide range of applications
It is suitable for efficient drying of fibrous, blocky and agglomerated powdery materials, with strong compatibility, meeting the diverse needs of different industries for material form and production capacity.
2. Efficient drying performance
The new composite lifting plate design is adopted to fully mix and contact the material with the hot air to achieve fast, uniform and dead-angle drying. The feed end is equipped with a positive spiral lifting plate to speed up the material to enter the drying stage and improve the overall drying efficiency and output.
3. Intelligent frequency conversion speed regulation
The drum speed can be flexibly adjusted between 3~12 rpm, and the operating parameters are automatically optimized according to the moisture content of the material to ensure accurate and stable drying.
4. Multi-heat source adaptation, energy saving and consumption reduction
Supports multiple fuel forms such as coal, biomass pellets, wood chips, natural gas, fuel oil, etc., adopts efficient heat exchange system, high heat utilization rate, low fuel consumption, and better operating cost.
5. Safety guarantee upgrade
The system integrates spark detection and fire extinguishing devices (including spark detectors, sound and light alarms, sprinkler systems and linkage controllers) to effectively prevent fire risks and improve operational safety.
6. Strong structure and stable operation
The roller ring and the wheel support are both made of cast steel integral structure, which is pressure-resistant and wear-resistant, and the cylinder runs smoothly and reliably; the core parts are made of high-temperature resistant alloy steel castings, which are particularly suitable for high-temperature and high-load conditions of the drying belt, extending the service life of the whole machine.
7. Excellent sealing and thermal insulation performance
The cylinder inlet and outlet end adopts elastic wear-resistant steel sheet sealing structure, which has good sealing and convenient installation. With the high-temperature refractory bricks lined in the cylinder, it effectively prevents heat loss and inner wall wear, and improves energy saving effect.
8. Easy installation and economical investment
The equipment has a compact structure, occupies a small area, and has an energy-saving and efficient supporting heat source system. It is easy to arrange and debug on site, has a low overall investment cost, and is easy to maintain in the later stage. It is suitable for long-term operation of medium and large production lines.
Wood Drying Machine Technical Parameters
In order to meet different production capacities and material drying requirements, RICHI provides various models of drum wood dryer machines, which are suitable for continuous low-temperature drying of various materials such as wood chips, sawdust, wood chips, biomass raw materials, etc. The equipment adopts a three-layer drum structure, with flexible configuration and stable performance. It is an ideal choice for wood pellet production lines and biomass fuel pretreatment systems.
| Wood Drying Machine | |||||||||
| Model | φ0.6*6 | φ0.8*8 | φ1.2*12 | φ1.5*15 | φ1.8*18 | φ1.8*20 | φ1.8*36 | φ1.8*12*3C | φ1.8*24*3C |
| Diameter (M) | 0.6 | 0.8 | 1.2 | 1.5 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 |
| Length (M) | 6 | 8 | 12 | 15 | 18 | 20 | 36 | 12 | 24 |
| Number of Layers | 1 | 3 | |||||||
| Drum Speed (RPM) | 3~12 | ||||||||
| Inlet Air Temperature (℃) | 400~500 | ||||||||
| Air Outlet Temperature (℃) | 70~80 | ||||||||
Application of Wood Drying Machine in Wood Pellet Production Line
— Richi Machinery —
When establishing an efficient and stable wood pellet processing equipment, the pretreatment and drying process of raw materials are crucial. Especially for logs or wet sawdust with high moisture content, the drying process directly affects the pellet forming effect and the continuous operation of the entire line. The following takes a typical 2-2.5T/H wood pellet production line as an example to briefly introduce its process and the role of the wood drying machine.
1、Raw Material Pretreatment
The first step of the production line is to pretreat the collected wood raw materials. Since logs are usually large in size and irregular in shape, they cannot be directly fed into the crusher, so a drum slicer is required to cut the logs into 3-5 cm wood chips. This step not only facilitates subsequent crushing, but also improves crushing efficiency and ensures the quality and forming effect of the finished pellets. Reasonable slice size can also effectively avoid equipment blockage and ensure smooth operation of the production process.
2、Wood Crushing
The wood chips are fed into the high-efficiency crusher through the conveying equipment, and the 3-5 cm wood chips are crushed into 3-5 mm fine pellets. The size of the crushed pellets is uniform, which is conducive to subsequent drying and pelletizing. The crushing stage is one of the key links in pellet production. It not only determines the final quality of the pellets, but also affects the working efficiency of the dryer and pelletizer. Uniform and fine crushed materials can ensure smoother drying and pressing processes, and improve production and yield.
3、Wood Drying
The moisture content of the crushed wood chips is usually high, and it needs to be dried by a three-drum rotary wood dryer machine. The dryer generates hot air through the combustion furnace, and the material is continuously thrown up by the lifting plate in the drying cylinder, fully contacting with the hot air, so that the water evaporates quickly. Through the efficient heat exchange process, the moisture content is reduced to 13-15%, which meets the requirements of pelletizing. Drying not only improves the compressibility and molding quality of the wood chips, but also effectively avoids the problem of material blocking in subsequent processes, ensuring the continuous and stable operation of the production line.
4、Pellet Granulation
The dried wood chips are transported to the anti-caking silo in front of the pellet machine, and then evenly fed into the pelletizing chamber through a forced feeder. The pellet machine compresses the wood chips into cylindrical pellets with a diameter of 6-8 mm through high temperature and high pressure. During the pelletizing process, the fiber structure of the material is rearranged to form wood pellets with high density and good hardness. A good feeding system design effectively avoids material blockage, ensures the continuity and efficiency of production, and improves the appearance and physical properties of the final product.
5、Pellet Cooling
The freshly baked wood pellets are at a high temperature and contain a certain amount of humidity, and must be cooled to room temperature by a countercurrent cooler. During the cooling process, the structure of the pellets is further stabilized, and the moisture content is further reduced, avoiding the cracking or deformation of the pellets caused by excessive temperature differences. The cooled pellets are easy to store and transport, can maintain good mechanical strength and appearance, extend the shelf life, and reduce storage losses.
6、Pellet Packaging
Finally, the cooled wood pellets enter the automatic packaging system and are packaged in bags or bulk according to customer needs. Packaging is not only convenient for storage and transportation, but also for sales. Modern packaging equipment supports a variety of specifications and weight options to ensure the sealing and aesthetics of the packaging, effectively prevent the product from being damp and damaged during transportation, and improve the market competitiveness of the product.
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How to choose a suitable wood drying machine?
If you are considering setting up a wood chip production line, sawdust production line or biomass pellet production line, or want to improve the drying efficiency of raw materials, a suitable wood dryer machine is very important. But faced with many models and parameters, many customers often don’t know how to choose.
In fact, choosing a satisfactory wood dryer machine does not need to be too complicated. First of all, you must clarify your raw material type, such as wood chips, wood chips, grass or other agricultural and forestry waste, because different materials have different drying characteristics and different structural requirements for equipment. Secondly, you must know your production goals, such as how many tons a day, whether you need to work continuously, which is directly related to the model size and number of layers of the dryer.
In addition, some customers will worry about fuel costs and operating expenses. The wood dryer machines provided by RICHI support a variety of fuels, such as coal, biomass, natural gas, wood chips, etc., which can be flexibly selected according to local energy conditions to help save operating costs. If you have high requirements for the automation of the equipment, we can also provide models with frequency conversion speed regulation, spark detection system, electronic control linkage and other functions, making it safer to use and more worry-free to operate.
Another issue that many customers are concerned about is the life and maintenance of the equipment. RICHI has made many optimizations in the equipment structure, such as using wear-resistant steel, lining refractory bricks, strong sealing, reducing heat loss, and more stable long-term use. Another important point is that our dryers are easy to install and debug, and do not occupy a large area, so they can be well arranged even for projects with limited plant space.
In short, when choosing a wood drying machine, don’t worry about not understanding the technology. You only need to tell us basic information such as raw materials, output, heat source, site, etc., and we can help you quickly recommend a suitable solution. If you are considering purchasing, you may wish to contact us, and we will customize a satisfactory equipment configuration for you from many aspects such as practicality, economy, and safety.
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Wood drying machine Related Project Cases
RICHI Machinery has many years of practical experience and exports its products to more than 150 countries, providing numerous customized wood drying solutions around the world. From Europe to North America, our wood drying machines help customers optimize pellet production, reduce moisture-related losses, and ensure stable raw material quality. The following project cases demonstrate the flexibility, efficiency and performance of RICHI’s wood drying systems.
wood dryer machine for Austrian biomass pellet plant
- Country: Austria
- Date: March 2024
- Output: 3 tons/hour
- Pellet size: 6-8 mm
- Application: Biomass pellet fuel production
- Customer needs: Reduce moisture content in pelleting process from 45% to 12%; achieve low energy consumption and stable drying output
- Required equipment: wood drying machine(φ1.5×15), hammer crusher, pellet machine, cooler, packaging system
- Customer feedback: “Stable operation even with moisture fluctuations. The performance of the dryer exceeded expectations.”
Sawdust drying production line for animal bedding pellet plant in the United States
- Country: United States
- Date: July 2023
- Output: 5 tons/hour
- Pellet size: 8 mm
- Application: Horse and livestock bedding pellets
- Customer needs: Continuous operation around the clock; low fuel drying system that meets US safety standards
- Required equipment: wood drying machine(φ1.8×20), airflow dust collector, cyclone separator, biomass burner
- Customer feedback: “Impressive thermal efficiency and low operating costs. Plug and play. ”
German forestry waste organic fertilizer pellet drying system
- Country: Germany
- Date: May 2023
- Output: 2 tons/hour
- Pellet size: 4 mm
- Raw materials: sawdust mixed with livestock manure
- Application: organic fertilizer pellet production
- Customer needs: dry mixed organic raw materials with uneven moisture distribution
- Required equipment: compact wood drying machine(φ1.2×12), belt conveyor, control panel
- Customer feedback: “RICHI’s solution reduced our drying time by 30% and improved the integrity of the pellets.”
Swedish commercial heating pellet plant sawdust rotary dryer
- Country: Sweden
- Date: February 2024
- Output: 5 tons/hour
- Pellet size: 6 mm
- Application: district heating biomass pellets
- Customer needs: continuous drying with minimal manual intervention; the final moisture content is always kept below 12%
- Required equipment: wood drying machine(φ1.8×18), biomass combustion hot air furnace, automatic spark alarm system
- Customer feedback: “The drying quality directly improves the combustion efficiency of our pellets. This is a reliable investment. “
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Why Choose RICHI Machinery
Choosing RICHI Machinery means you’ll receive not only high – quality equipment but also one – stop solutions and comprehensive service support. Here are some key reasons to choose us:
30 years of industry experience
Since its founding in 1995, RICHI Machinery has accumulated 30 years of experience in the design and manufacturing of biomass pelletizing systems, offering high-performance solutions and competitive wood pellet production line price to meet the diverse needs of global customers.
Customized turnkey solutions
We offer a complete wood pellet production line, covering project design, equipment manufacturing, installation and commissioning, and personnel training, according to your specific needs. Whether it’s a small farm or a large feed factory, we can tailor a suitable production plan for you.
Complete after – sales service
We have a comprehensive after – sales system, providing you with all – round services from pre – sales consultation to after – sales maintenance. This includes professional and systematic training to help you quickly master equipment operation and maintenance skills and maximize project requirements.
Built Around Your Needs
We can create customized production line projects based on your unique requirements. For example, we provided customized technical solutions and operation training for the wood drying machine to help the production line operate stably in the long term. You can find us on YouTube.
Our Honors & Certifications
At RICHI Machinery, quality and innovation go hand in hand. Over the years, we have earned numerous international certifications and national patents, covering product design, manufacturing excellence, and quality control. These certificates reflect our strong R&D capabilities and global trust in our feed and biomass machinery solutions. We remain committed to delivering reliable technology and long-term value to our customers worldwide.
