Wood Granulator Machine
Wood granulator machine is a pellet – making equipment that specializes in processing wood raw materials such as sawdust, wood powder, wood chaff, bamboo chips, bark, etc. The equipment converts loose waste into standardized pellets with a diameter of 6-12mm through processes such as crushing, drying, screening, extrusion granulation, countercurrent cooling and packaging.
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wood granulator machine: classification of wood raw materials
As an important equipment for wood energy conversion, the wood granulator can, therefore, efficiently process many types of wood raw materials and achieve efficient resource conversion from waste to treasure.
Forestry resources:
- Firewood forest: a type of forest used for burning and supplying energy.
- Nurturing and thinning residues: scattered wood, branches, etc. produced by forest operations.
- Wood processing waste: scraps, sawdust, sawdust, etc.
- Forestry by-product waste: such as shells and fruit kernels.
agricultural resource:
- Crop straw: the remaining part of harvested crops such as corn, sorghum, wheat, rice, beans, cotton, etc.
- Agricultural processing waste: such as rice husks.
- Energy plants: herbaceous energy crops, oil crops, etc.
livestock manure:
- Livestock manure and its mixture with grass are one of the common raw materials in biomass energy.
- They can be regarded as another form of transformation of organic matter such as wood.
- After drying, crushing, granulation and other processes, biomass fuel pellets can be made.
Urban organic solid waste:
- Food residues: leftover food from restaurants and households.
- Garden remnants: trimmed branches, fallen leaves.
- Waste paper and wood: office waste paper, waste furniture, etc.
- Plant debris: Plant waste generated from urban green spaces.
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wood granulator machine: working principle
Step-by-Step Pelletizing Process from Raw Wood to Finished pellets
The wood pellet mill machine goes through four core processes: “pretreatment → extrusion molding → precision cutting → intelligent control”.
- Firstly, the granulator machine is the key equipment in this process. It plays a crucial role in transforming wood raw materials into useful products.
- The crushed and dried wood raw materials are fed into the ring mold granulation chamber through an adjustable feeder.
- Then, the motor drives the pressure roller and the ring mold to rotate at high speed. The raw materials are extruded into cylindrical shapes through the mold holes under strong pressure from both, and synchronously cut into pellets of the desired length by fixed cutting tools, achieving efficient conversion from wood raw materials to standardized pellets.
- By replacing ring molds with different aperture sizes, the pellet diameter can be flexibly adjusted (such as 6-8mm), achieving continuous production of pre treated raw materials to formed pellets throughout the entire process.
Model parameters of wood granulator machine
RICHI Machinery offers multiple models of wood granulators to meet different production needs. Among these, the wood granulator comes in various specifications. Each model has its own unique features and production capabilities. If you plan to build a new sawdust pellet factory, you can contact RICHI Machinery for a complete sustainable production plan. The following are the main parameters of each model:
| model | capacity | pellet diameter | weight | Size (mm) |
| MZLH320 | 300 – 800KG/H | 6 – 12mm | 2500KG | 2200×900×1300 |
| MZLH350 | 500 – 1000KG/H | 6 – 12mm | 3500KG | 2500×1100×1600 |
| MZLH420 | 1-2 tons/hour | 6 – 12mm | 4000KG | 2800×1150×1730 |
| MZLH520 | 2-4 tons/hour | 6 – 12mm | 4500KG | 3000×1260×1860 |
| MZLH768 | 2.5-7 tons/hour | 6 – 12mm | 5000KG | 3300×1500×2000 |
| MZLH858 | 3-10 tons/hour | 6 – 12mm | 5500KG | 3500×1600×2180 |
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wood granulator machine: core advantages
Efficient energy consumption ratio Advantage
The wood pellet mill adopts advanced compression technology and forming equipment, which can achieve efficient pellet production process with low energy consumption. Compared with traditional energy equipment, its energy consumption is significantly reduced, and the produced particulate fuel has a higher energy density, which can provide users with more economical and efficient energy solutions.
Multifunctionality Advantage
This device is not only suitable for wood, but also for processing other cellulose materials such as straw, rice husks, peanut shells, etc. The wood pellet machinery can handle a wide range of materials. Its versatility makes it popular in different industries. Specifically, it provides users with a wider range of raw material choices. Consequently, it reduces dependence on a single raw material. Ultimately, this enhances production flexibility and stability.
High pellet quality Advantage
The wood granulator can achieve uniform shaping of pellets with high density and strength. This means that particulate fuels have better performance during storage, transportation, and combustion, reducing fragmentation and loss, and improving energy efficiency.
High degree of automation Advantage
Wood granulators usually use fully automatic or semi – automatic control systems. Consequently, they are easy to operate, capable of achieving continuous and stable production processes, reducing manual intervention, and improving production efficiency and product quality consistency.
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Application fields of wood granulator machine
The wood pellet mill machine is the core equipment for the resource use of wood waste. With the generation of a large amount of waste materials such as sawdust and shavings in social production, they are converted into wood pellets through crushing, drying, and extrusion molding processes for use in energy, industrial use, animal bedding, and other fields. As a key equipment for turning waste into treasure, its efficient and environmentally friendly advantages contribute to the circular economy and continue to receive attention in the utilization of renewable resources.
wood energy Application Field
The pellet fuel produced by wood pellet mill is a renewable energy source that can be used for equipment such as wood power plants, boilers, fireplaces, etc. The amount of carbon dioxide produced during the combustion of these particulate fuels is much lower than that of traditional fossil fuels, which helps to reduce greenhouse gas emissions and is of great significance for environmental protection.
Industrial use Application Field
The pellet fuel produced by the wood granulator can be used as a clean energy substitute for heating, drying and other processes. Its stable combustion performance and high energy density can meet the strict energy requirements of industrial production, while reducing the energy costs of enterprises.
Animal bedding and feed additives Application Field
In addition to the energy sector, pellet mill for wood pellets can also be used to make animal bedding and feed additives. These pellets have good moisture absorption and breathability, providing a comfortable cushioning environment for animals. At the same time, adding an appropriate amount of pellets to the feed can improve its tastiness and nutritional value.
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How to choose a suitable wood granulator machine?
1. Consider production capacity and product quality
When choosing a wood granulator, production capacity and product quality are two key factors. Different models of equipment have different production capacities and pellet qualities. Therefore, users should choose the appropriate equipment based on their own needs and budget.
2. Pay attention to the technical parameters of the equipment
The technical parameters of the equipment, such as host power, pellet diameter, weight, and size, can also affect its performance and applicability. Users should carefully study the technical parameters of the equipment to ensure that it meets production requirements.
3. Choose a reputable manufacturer
Choosing a reputable and technically strong manufacturer is the key to ensuring equipment quality and service. Some well-known manufacturers, such as RICHI Machinery, not only provide high-quality equipment, but also offer comprehensive after-sales service and technical support.
wood granulator machine: Production process
— Richi Machinery —
To illustrate, it mainly includes 5 steps: wood slicing, wood crushing, wood drying, wood granulation, and wood pellet cooling. The wood granulator, which is the heart of the wood pellet line, is involved in the crucial granulation step. It turns processed wood materials into high-quality pellets. Taking 2-2.5T/H Wood Pellet Production Line as an example, the specific production process is as follows:
2-2.5T/H Wood Pellet Production Line
(1) Wood cutting process
Wooden raw materials (such as logs and scraps) are transported by a conveyor to a drum cutting machine, where they are initially cut into 2-3cm wooden chips using a high-speed rotating cutter head; Subsequently, the material enters the “crushing section” and is further crushed to 5-10mm by toothed rollers or hammers, laying the foundation for subsequent processing.
(2) Wood crushing technology
In the next stage, after preliminary slicing, the crushed materials are transported by a conveyor to a “wood hammer mill”, where they are crushed into 3–5mm wood chips through high-speed rotating hammers and mesh screens, meeting the pellet size requirements of the drying process.
(3) Wood drying process
The crushed wood chips are blown into the “storage bin” for temporary storage by the “air delivery system”, and evenly fed into the “drum dryer” by the variable frequency conveyor; After drying, it is transported to the granulation section through a closed fan.
(4) Wood granulation process
Then the dry wood chips are fed into the “variable frequency impeller feeder” through a conveyor, and uniform feeding is achieved through speed adjustment; The material enters the extrusion chamber of the “ring mold granulator” and is formed into cylindrical pellets under high-pressure extrusion of the pressure roller and ring mold. Then, it is cut into standard lengths of 5-30mm by a cutting knife and temporarily stored in a buffer bin by a conveyor.
(5) Cooling process of sawdust pellets
The newly produced pellets enter the “counter current cooler” through a mesh belt conveyor, utilizing room temperature air convection heat exchange to lower the pellet temperature to room temperature, meeting storage, transportation, combustion, and application requirements.
Equipment configuration of wood granulator machine production line
— Richi Machinery —
A complete wood pellet line requires a well-matched set of equipment to efficiently turn wood raw materials into high-quality, uniform biomass pellets. The line includes both processing machines and conveying systems. Each machine plays an important role in pretreatment, pelletizing, and post-processing stages. Working together, they ensure stable operation, consistent pellet quality, and low energy consumption.
Below is a list of the main equipment commonly used in a wood pellet production line:
Drum type slicer
Wood crusher machine
Template crusher
Wood chip crusher
Drum dryer
wood pellet granulator
Counterflow cooler
Vibration screen
packaging scale
Drum type slicer
Suitable for processing raw wood materials, capable of cutting them into 2-3cm thin slices to prepare for subsequent processing.
Wood crusher machine
Mainly used for cutting and crushing small pieces and small output logs.
Template crusher
For template type raw materials, it has similar functions to drum chippers, but with a wider width and slightly different feeding methods.
Wood chip crusher (droplet crusher)
Further crush small wood chips into 3-5cm wood chips to meet granulation requirements.
Drum dryer
Dries the moisture content of wet materials to around 15%, creating suitable conditions for granulation.
wood pellet granulator
Produce finished pellets from raw materials such as sawdust and straw.
Counterflow cooler
Uses indoor air to cool finished pellets to around room temperature.
Vibration screen
Screen finished pellets to remove powdery and crushed materials, ensuring pellet quality.
Finished product packaging scale and thermoplastic sealing machine
Completes the weighing, bagging, and sealing of finished product pellets for easy storage and transportation.
Main component equipment of wood granulator machine
— Richi Machinery —
In the production process of wood pellet mills, various components and equipment play a key role: they each perform their own duties, work closely together, and jointly ensure the efficiency, stability, and quality of production. If you are interested in our wood granulator, you are welcome to leave a message at any time.
Anti caking material bucket
Due to the light weight and poor fluidity of wood chips, they are prone to clumping and affect production. The specially designed anti-caking material bucket, through a reasonable structural design, can effectively prevent wood chips from clumping. As a result, it ensures smooth feeding of wood chips. Consequently, this also guarantees the continuity of the production process.
Protective device
In order to reduce machine wear and prolong the service life of the wood granulator, the equipment is equipped with a protective device to reduce the risk of machine damage.
Forced feeding machine
Given that wood chips are relatively light and difficult to enter the granulation room on their own, the configuration of a forced feeding machine is particularly necessary. Moreover, it can firmly push the wood chips into the granulation chamber. As a result, it keeps the granulation process running smoothly and steadily. More importantly, this steady process strongly supports the normal and reliable operation of pellet production.
Granulation chamber and key components
To begin with, the granulation chamber is the core component for forming wood chips into pellets. The ring die and rollers press the chips into solid pellets, but require the material to be crushed to 2–3mm and dried to about 15% moisture. Made of 304 stainless steel, the die and rollers resist rust and ensure hygiene, improving durability and safety. The ring die can also be replaced to produce pellets of various sizes.
Cutting device
In addition, the cutting device can easily adjust the gap between the knife and the ring die. Therefore, it helps control the final pellet length more accurately. The cutting tool can also make longer pellets to meet different customer needs.
Engine
Due to the characteristics of the raw materials, producing wood chips requires significant pressure. The equipment uses Siemens Class 8 motors, which have the characteristics of low speed and high power, providing strong power support for production.
Customer Success Cases
In the field of wood energy, wood pellet plants of different sizes have diverse production needs and operation models. The wood granulator machine is the key equipment in these plants. It ensures the smooth operation of the production process. RICHI focuses on turnkey projects for wood granulator production lines. Its products have covered more than 150 countries and regions including Japan, Canada, Germany, Russia, the United Kingdom, Australia, Chile, etc., serving thousands of customers, and many cases have become local benchmark projects.
The following are examples of wood pellet production projects in different regions and scales, which showcase RICHI’s diversified solutions and engineering experience in the field of wood pellet equipment:
Indonesia 1-1.5T/H wood pellet plant
- Capacity: 1-1.5T/H
- Construction time: July 2021
- Raw materials: wood sawdust
- Core equipment: MZLH420 wood granulator × 1 unit (particle size 8mm)
- Pretreatment equipment: high-quality wood chipper, hammer mill
- Full process equipment: chipper, dryer, cooler, screener, packaging machine
- Location: Indonesia
2-3T/H wood pellet mill for sale canada
- Capacity: 2-3T/H
- Construction time: December 2023
- Raw materials: wood waste, sawdust (industrial residue recycling)
- Drying equipment: sawdust dryer
- Pelletizing system: wood pelletizer (matching MZLH520 Model)
- Automation equipment: electric control cabinet, vibrating screen, cooler, automatic packaging system
- Location: Canada
USA 10T/H wood pellet manufacturing plant (environmentally friendly production line)
- Capacity: 10T/H
- Construction time: November 2020
- Raw materials: wood waste (single raw material efficient processing)
- Cleaning system: pulse dust collector (meets strict environmental standards)
- Pelletizing equipment: ring die sawdust pelletizer
- Full process equipment: chipper, dryer, cooler, screener, packaging machine
- Location: United States
20T/H wood pellet machine germany
- Capacity: 20T/H
- Construction time: 2019 April 2017
- Raw materials: branches, leaves, trimmings, cuts, shavings, sawdust (multiple types of agricultural and forestry waste)
- Pretreatment equipment: high-quality wood chippers, hammer mills
- Drying system: rotary dryer (suitable for high-humidity raw materials)
- Pelletizing and post-processing: sawdust pellet machine, countercurrent cooler, automatic packaging machine
- Location: Germany
Frequently asked questions
Can all raw materials be made into pellets?
Our equipment can produce pellets from any wood organic raw material. Even if the raw materials are uncommon, as long as they meet the requirements, they can still be produced.
How to make pellets from different raw materials?
First, process the raw materials into a powder form suitable for granulation, with a size of 3-5mm and a moisture content of 13-18%. The processing steps are as follows: slice the large raw materials into small pieces, then crush them into powder, and if the raw materials are wet, dry them. The equipment used includes wood slicers, wood crushers, drying drums, and granulators.
What is the size of the finished pellets?
The general pellet size of finished products from our wood granulator is 2-12mm, with commonly used sizes of 6mm, 8mm, and 10mm.
Can only a single device be purchased?
No. Our equipment can form a complete wood pellet production line, covering slicing, crushing, drying, granulation, packaging and other sections. It can also be customized according to customer raw materials, such as sawdust, straw pellet production lines, etc. Customers can also purchase granulation machines or other equipment separately as needed, such as crushers, slicers, and drying drums. If you are interested in our wood pellet making machine price, please leave your contact information and we will contact you as soon as possible.
What is the production line and granulator capacity that can be provided?
The output range of the production line is 0.5-40T/H, and the output range of the granulator is 0.5-10T/H. We can provide all output specifications within this range.
What services are provided besides equipment?
In addition to production equipment, we also provide a series of services such as process design, equipment layout, factory planning, machine testing, shipping customs clearance, installation training, and after-sales service.
about us
RICHI Machinery‘s wood granulator machine is a revolutionary force in the wood energy and related industries. With their high-quality pellet production, extensive adaptability to raw materials, energy-efficient operation, durable design, and customized solutions, they provide comprehensive solutions for customers’ needs. Whether you want to enter the wood energy market, improve existing pellet production efficiency, or recycle wood waste in an environmentally friendly way, RICHI Machinery’s granulator is the ideal choice. Contact us now to learn more about our products and services, and let us help you unleash the power of wood.
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