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Wood Pellet Mill

Wood Pellet Mill

CAPACITY: 300KG/H-4.5T/H
MAIN POWER: 37-280KW
MODEL: MZLH
APPLICATION: Wood Pellet Production

Wood pellet machine is mainly a machine that uses sawdust, wood flour, wood bran, sawdust, wood shavings, bamboo shavings, bark, etc. as raw materials, and processes the raw materials into wood pellets through processes such as crushing, drying, pelletization (granulation), and cooling. device. Richi Machinery is a wood pellet machine manufacturer in china, offers service through a worldwide network in nearly every country. You can get supported directly from RICHI by teams of pelleting technology specialists.

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Wood Pellet Mill

Applications Of Wood Pellet Mill

pellet maker for pellet stove
As a wood pellet machinery supplier, Richi Machinery manufactures and supplies the key wood pellet processing machine and othe processing machine in the wood pellet production line. RICHI wood waste pellet machine can be used for wood and various agricultural and forestry wastes, which is applicable for all kinds of biomass materials. We also offer single machines for the production of biomass wood pellets, solid biofuel, and waste pellets.

The global warming impact, the increasing prices of fossil fuel, and the need to produce thermal and electrical energy stimulated the creation of an industry leaning toward energy production by renewable sources. Biomass is a widespread renewable source to provide energy demand in terms of electricity and heat. Of course, wood pellets have many other uses, such as cat litter, organic fertilizer, etc.

Wood is by far one of the oldest and most abundant types of biomass raw materials. In addition to cord word, other types of forest products residues such as tree tops, branches, bark, logging slash, and saw mill waste can be used as sources of biomass energy.
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As a raw material; wood (hard and soft woods), wood chips, sawdust, hull, tree branches, tree leaves and similar forest residues are used.

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Technical Features Of Wood Pellet Mill

1. The wood pellet mill main shaft system uses double support structure without shake to offer more extrusion force from ring die.

2. The wood waste pellet machine control device of ring die and roller is external to realize gap adjustment without stop-working.

3. The wood pellet machine rollers use circulating water cooling, realizing lower temperature and longer service time of bearings, and lower oil consumption.

4. The bearings of main shaft and roller with temperature measuring device, which can monitor the working status of wood pellet making bearings.

5. The wood pellet maker key components like main shaft, driving wheels and gears are made of high strength forged alloy steel. Gears are processed by high precision gear grinding machine.

6. The wood pelletizer driving system uses imported bearings to ensure the reliability and long service time of the equipment.

Working Principle Of Wood Pellet Mill

Typically any wood raw material will require some form of processing prior to being pelletized. This can range from debarking if using whole logs (round wood) to shredding or grinding of pallets, or ag products. Once the product is shredded or ground, it could require further processing through a wood pellet hammer mill, depending on how it was received.

If the wood waste raw material is wet (over 15%) it will need to be dried. After sizing and drying if needed, the product is now ready to be pelletized. Pellets can be made in a wide range of diameters and bulk densities, which is typically determined by the end use of the pellet. The wood pellet machine ring die specifications can be changed, allowing for multiple sizes to be produced from the same wood waste pellet machine.

In most cases pellets will exit the wood pellet production machine hot (100-170 degrees) and must be cooled. This is done with a pellet cooler by pulling ambient air through the pellets. Once the wood pellet is cooled to ambient temperature, the pellets are screened to remove any fines that may have been created during the wood pellet production process. The wood pellets are now ready to be packaged by wood pellet packing machine, stored or sold in bulk.

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Wood Pellet Machine Price & Specification

wood pellet plant investment cost
Model MZLH320 MZLH350 MZLH420 MZLH520 MZLH768 MZLH858
Wood Pellet Mill Power 37KW 55KW 90KW 132KW 250KW 280KW
Capacity(wood sawdust,biomass) 300-400KG/H 500-700KG/H 1.0-1.2 T/H 2.0-2.5 T/H 2.5-4 T/H 3-4.5 T/H
Final Pellet 6-12mm 6-12mm 6-12mm 6-12mm 6-12mm 6-12mm
Weight(KG) 2500 3500 4000 4500 5000 5500
Wood Pellet Making Machine Price 7000-100000USD
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Energy content for various wood residue(dry weight basis)

The application of wood residue pellets is increasingly widespread, but the application as fuel pellets is still dominant. Therefore, it is still necessary to discuss the raw materials of wood pellets.

Raw material KJ/Kg (KiloJoule/Kg) Kcal/Kg (Kilo calories/Kg)
  lower calorific value higher calorific value lower calorific value higher calorific value
Oak wood 17400 18800 4159 4493
Birch wood 18700 20100 4469 4804
Pine wood 19500 20800 4661 4971
Douglas pine wood 19700 21000 4708 5019
Spruce wood 18500 19800 4422 4732
Cherry wood 17900 19100 4278 4565
Cypress wood 21500 23000 5139 5497
Elm wood 19000 20500 4541 4900
Eucalyptus wood 18300 19600 4374 4684
Maple wood 18700 20000 4469 4780
Larch wood 18700 20100 4469 4804
Poplar wood 19400 20800 4637 4971
Teak wood 18900 20200 4517 4828
Coconut trunk wood 16600 17800 3967 4254
Willow wood 17300 18600 4135 4445
Hardwood bark 18300 19600 4374 4684
Oak bark 18300 19300 4374 4613
Pine bark 19700 21000 4708 5019
Spruce bark 19100 20300 4565 4852
Cedar bark 19800 21100 4732 5043
Douglas fir bark 20800 22100 4971 5282
Eucalyptus bark 17.300 18.500 4135 4422
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How Are Wood Pellets Produced By Complete Wood Pellet Plant?

In global market, wood pellets are mostly produced from sawdust, wood shavings and other woody byproducts. Traditionally, wood pellet production line units are located on or nearby sawmills and other wood processing sites, representing complementary outlet for these wood pellet manufacturing plants. In this context, a first crucial step for wood pellet producers consists of grinding and drying the moist wood residues.

The energy needed for this is mainly made available by the burning of bark or any low quality wood, which likewise accumulates on site. In many cases, not only is heat produced by burning the bark, but also electricity that can be optimally used to run unit. After the wood waste is dried, it is fed into a biomass wood pellet mill. Within the wood pellet maker, dry woody materials are squeezed through a die with holes of the required size (normally 6 mm diameter, sometimes 8 mm or larger) called a matrix.

The high pressure of the wood pellet pressing machine causes the temperature of the wood to increase greatly, causing the surface to plasticise slightly to form a natural "glue" that binds the wood pellet together as it cools. To facilitate the wood pellet pressing process and improve quality parameters, small quantities (max. 2%) of natural binder such as starch can be added, but no glues enter the composition of wood pellets.

Newly compressed pellets are now ready to be cooled and sieved to remove any residual particles. Finally, wood pellets can be stored and/or bagged by wood pellet packing machine prior being delivered to end consumers.

Complete wood pellet manufacturing process is shown below: (Related post: how to set up a complete wood pellet plant or biomass wood pellet production line)
wood pellet plant investment cost

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Types of wood pellet mills for sale

According to the shape of the pressing die, pellet mill for sale can be classified as:

In both cases, there has to be a rotary element, which can be the die or the rollers. In the case of flat dies, the rollers are the moving element, whereas the most common design of ring dies is where the die is powered and rotating, and the rollers move due to the friction and movement of the die.
how does a wood pellet machine work

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Ring die pellet mill or flat die pellet mill, which is better?

Although we also design and manufacture flat die wood pelletizers, with the continuous improvement of the processing technology of wood pellets, the characteristics of the flat die wood pellet manufacturing equipoment are not as good as the absolute advantages of the ring die wood pellet press machine.

As a professional wood pellet mill manufacturer, we must sincerely tell everyone that the wood granulator technology must move forward, and the ring die wood granulator is the final trend. Considering the quality of equipment, durability, maintenance cost, and quality of finished pellets and other aspects, if the output you need allows, try to choose a ring die wood pelleting machine.

Usually you can see many flat die wood pellet makers on the Internet, which will confuse many customers who are in the wood pellet processing industry for the first time. In fact, well-known and professional wood pellet mill manufacturers do not recommend purchasing flat die pellet mills for wood and biomass pellets, because the quality of the actual processed pellets is not good, and the output cannot keep up.

When you browse the official websites of groups such as CPM and Buhler, you can easily see that there is only a ring die pellet mill machine (which can also be a wood pellet extruder or feed pellet extruder), and there will never be a flat die biomass wood pellet making machine.

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Types of wood pellet mill die

There are different die types of RICHI ring die pellet mill for wood pellet plant that vary with regard to hole depth, hole pitch, hole width and die material.

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These parameters have to be optimized in view of the particular feedstock to guarantee good productivity and to avoid blocking the wood pelletizing machine dies. Blocked dies can be found when:

  1. The wood pellet raw material generates more resistant force while passing through the die than the force generated by the roller;
  2. The wood pellet machine die hole is corroded.

If the wood pellet making machine ring die gets blocked, the material has to be drilled out. To facilitate this process, it is best to work when the die is still warm, previous to the formation of hard pellets within the die holes.

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Why Choose Richi

why choose richi
why choose richi
Introduction of RICHI
Strength certification

Richi Machinery is a professional manufacturing enterprise integrating scientific research and development, manufacturing, sales and service. We have developed and manufactured multifunctional pelletizers, grinders, mixers, dryers and more than ten categories and more than 30 models of complete machine products are widely used in feed, biomass, organic fertilizer, pet supplies, solid waste recycling, chemical industry, road construction and other fields. All RICHI products have passed ISO9001:2008 international quality system certification, EU CE certification and Customs Union CU-TR certification, successfully serving more than 2,000 customers in more than 100 countries and regions around the world.

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Customized Design And Business Plan

In RICHI, every equipment and every pellet production line business plant can be customized. We will formulate multiple sets of pellet production process plans for comparative analysis according to the actual needs of customers, select a reasonable plan, and realize private customization. Our services run through all aspects of on-site terrain and environment survey, production line process design, raw material testing, cost requirement analysis, project investment budget, equipment installation and commissioning.

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Customized Design And Business Plan
Customized Design And Business Plan
Customized Design And Business Plan
Customized Design And Business Plan
Quality Control
Richi Machinery

We adhere to the ISO9001 quality management system, and strictly implement international standards for product design and manufacturing processes. In terms of management systems, there are product quality accountability systems, product quality accountability systems, and safety production management systems; in terms of management tools, QC quality control management, SPC statistical process control, sampling inspection and measurement system analysis are used for quality control, to achieve effective control of the entire process of equipment production, and never let go of any quality hidden dangers that may affect customer operations.

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Quality Control

Delivery And Installation

RICHI has always been adhering to the spirit of craftsmanship to make every detail good, especially in the link of equipment preparation and delivery, we follow the standardized process: preparation order check-equipment factory quality inspection-packing list re-inspection-scientific packaging and transportation, ensure the safe and non-destructive delivery of equipment. According to customer needs, RICHI installation engineers will guide the construction of site infrastructure, equipment installation and commissioning and trial operation of the entire production line throughout the process. When the relevant project indicators reach the design standards, the client will carry out the project acceptance.

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Delivery And Installation
Delivery And Installation
Delivery And Installation
Delivery And Installation
Delivery And Installation
Delivery And Installation
Delivery And Installation
Delivery And Installation
After-sales And Training
After-sales And Training
Richi Machinery

We have built a team of nearly 100 technical engineers to solve a series of problems in the project from consultation, site survey, sample analysis to plan design, installation and commissioning, and maintenance. We provide comprehensive and systematic training for the technical staff of each customer to better serve the customer's project needs. After the technicians have finished their studies, RICHI will provide follow-up technical support services, and the training engineers will follow up the project use effects in the later stage to ensure the stable operation of the customer's project.

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