Wood Pellet Mill

Wood pellet machine is an extrusion equipment for making cylindrical pellets. It is mainly used in biomass fuel, crude fiber feed, granular activated carbon, carburizer and other industries. The specific uses are as follows.

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.

• Biomass fuel industry: Various wood waste, straw, rice husks, peanut shells, palm shells, corn cobs, waste cloth and other materials can be compressed and pelletized as environmentally friendly fuel pellets to replace coal.
• Crude fiber feed industry: The wood pellet machine can also be used as a professional equipment for making crude fiber pellets (straw, hay, etc.). It has large torque and can withstand high pressure. It is easier to use it to make crude fiber feed pellets.
• Granular activated carbon and carburizer industry: The raw materials of carburizer and activated carbon have the same properties, both are similar to carbon powder. Adding certain additives or moisture can be easily formed by pressing with a wood pellet mill.
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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.

The wood pellet mill is mainly composed of a feed port, a compression chamber, a discharge port and an electrical control system. Among them, the compression chamber is the core part of the granulator. It is composed of multiple compression molds and can compress waste wood materials such as sawdust into pellets. The quality and quantity of compression molds are important factors affecting the performance of the wood pellet mill machine.

• The wood pellet mill main shaft system uses double support structure without shake to offer more extrusion force from ring die;
• The wood waste pellet machine control device of ring die and roller is external to realize gap adjustment without stop-working;
• The wood pellet machine rollers use circulating water cooling, realizing lower temperature and longer service time of bearings, and lower oil consumption;
• The bearings of main shaft and roller with temperature measuring device, which can monitor the working status of wood pellet making bearings;
• 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;
• The wood pelletizer driving system uses imported bearings to ensure the reliability and long service time of the equipment;
• The pressure roller is cooled by circulating water. The bearing has low operating temperature and long service life, which can reduce grease consumption;
• The main shaft, transmission wheel, gears and other key parts are all made of high-strength forged alloy steel, and the gears are processed by high-precision gear grinding machines;
• The transmission system uses brand bearings to ensure the reliability and service life of the main engine;
• The ring die and pressure roller are made of high-strength forgings, drilled by automatic gun drilling and vacuum quenching heat treatment, and the working life of the ring die is >500 hours.

1. Renewable energy: The raw materials used in the wood pellet mill are renewable resources such as wood waste and bamboo waste, which have little impact on the environment and can be reused after use, which is in line with the current development trend of green environmental protection.
2. High efficiency: The wood pellet machine can press raw materials of various shapes into neat pellets, which improves the utilization rate of raw materials and production efficiency, and can significantly reduce production costs.
3. Intelligent: The new wood pellet machine adopts an advanced intelligent control system, which can realize automated production, and can monitor and adjust various parameters in the production process in real time, making the production process more scientific and accurate.
4. Widely used: Wood pellet machines are widely used in various industries, such as construction projects, furniture manufacturing, boiler heating, etc. It can also be used as fuel for biomass power plants, providing these companies with clean and efficient energy solutions.

1. 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.
2. 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.
3. 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.
4. 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 mill in fance

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  wood pellet mill for sale Vietnam

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  wood pellet mill for sale Indonesia

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  wood pellet mill for sale united States

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  wood pellet mill for sale Austria

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  wood pellet mill for sale Romania

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  wood pellet mill for sale poland

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  wood pellet mill for sale Argentina

A complete wood pellet mill plant requires major equipment such as wood chippers, crushers, dryers, wood pellet machines, pellet coolers, and packaging machines, as well as conveyors, electric control cabinets and other conveying equipment and control systems.

Wood Debarker

Capacity:
5-15T/H

Main Power:
7.5-11KW

wood splitter

Capacity:
3-12T/H

Rotate Speed:
10-20 KW

Rotary Dryer

Capacity:
Customized

Rotate Speed:
3-8 R/Min

Wood Chipper Machine

Speed:
3-18T/H

Main Power:
4-110 KW

wood Hammer Mill

Capacity:
3-25T/H

Main Power:
30-160KW

Pallet Shredder

Capacity:
3-20T/H

Main Power:
55-110 KW

wood Pellet Cooler

Capacity:
1.5-18T/H

Main Power:
0.75-2.05 KW

wood pellet Bagging Machine

Speed:
6-12 Bags/Min

Main Power:
1.1-5KW

wood pellet mill

Capacity:
0.3-10T/H

Main Power:
37-280KW

wood pellet screener

Capacity:
3-20T/H

Main Power:
1.5-5.5 KW

conveyer machines

Conveying Distance:
3-60M

Main Power:
3-30KW

Pulse dust collector

Model:
TBLMa

Main Power:
0.75-15KW

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Complete wood pellet manufacturing process is shown below: 

1. 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.
2. 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.
3. 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.
4. 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.

Richi Machinery have provided 1-40t/h wood pellet production lines, wood pellet manufacturing plants and single wood pellet making machines for hundreds of wood pellet manufacturers, and we hope that in the future, we can also help you successfully realize a high-efficiency, high-quality, and high-return wood pellet production business.

The followings are some wood pellet plant project proposal / wood pellet business plan/ wood pellet manufacturing project report for you:

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  8T/H wood pellet manufacturing project report

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  1.2T/H wood pellet production business plan

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  6T/H business plan on wood pellet production

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  20T/H business plan on wood pellet production

01

Good market prospects

Traditional energy can no longer meet the needs of the global market. Biomass wood pellet fuel, as a substitute for coal, can just make up for this energy gap.

02

Sufficient source of raw materials

The annual output of biomass wood energy such as straw exceeds the total energy demand, and as a renewable resource, their reserves are very abundant. Therefore, it currently has a good market prospect as an energy source.

03

High profit

The raw materials of the ring die wood pellet mill machine are crop stalks and so on. The cost of these materials is low, the cost per ton is low, and the processing output of the pellet mill equipment is high. In the face of huge market demand, the industry has considerable profits.

When purchasing a wood pellet machine, you need to pay attention to the following points:

1. Understand the raw materials: Different raw materials require different wood pellet mill machines. Therefore, before purchasing a wood pellet machine, you need to understand what raw materials you need, and then choose a suitable wood pellet mill.
2. Understand the production capacity: Different wood pellets machines have different production capacities. Therefore, when purchasing a wood pellet mill, you need to understand your production needs and choose a wood pellet machine with suitable production capacity.
3. Understand the quality of the machine: The quality of the machine directly affects the production efficiency and the service life of the machine. Therefore, when purchasing a wood pellet machine, you need to understand the quality and reliability of the machine and choose a machine with reliable quality.
4. Understand after-sales service: Good after-sales service can ensure the normal use of the machine and extend the service life of the machine. Therefore, when purchasing a wood pellet machine, you need to understand the manufacturer's after-sales service and choose a manufacturer with good after-sales service.

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  ENPlus Certification & DINplus Certification

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  Wood Pellet Certification For Canada Market

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  PFI wood pellets standards in United States market

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  ISO Wood Pellet Standard Certification For Global Market

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.

• Ring die pellet mills, which are applied to small, medium and large-scale pellet production industries. In other words, unless it is a scale of tens of kilograms or less than 100 kilograms, the ring die wood pelletizer can be applied to any size of wood pellet production business.
  
  In the wood pellet machine ring die, there are radial slots throughout the die. The die is positioned vertically, powder is fed into the centre of the die and spreaders evenly distribute the powder. Two or more rollers then compress the powder through the die holes. Two cutters are used to cut the wood pellets free from the outside of the die.
• Flat die wood pellet mills, is a kind of homemade wood pellet machine, which are used for very small scale wood pellet manufacturing (for home use, for mini scale). Flat die wood pellet makers use a flat die with slots. The powder is introduced into the top of the die and, as the die rotates, a roller presses the powder through the holes in the die. A wood pellet machine cutter on the other side of the die cuts the exposed pellet free.

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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.

• The depth of the hole is not related to the length of the pellet. It establishes the time the material is exposed to heat and pressure. Longer holes are recommended for materials with low lignin content to achieve better melting and, therefore, a harder, denser pellet.
• The pitch angle of the hole influences pellet compression, and it should be designed according to the feedstock.
• For biomass pellets, the most common diameters are 6 and 8 mm. These diameters, as well as the length of the pellets, are limited by the Pellet Standards to assure that the wood pellets can be fed by the screw conveyors of standardized stoves and boilers without blocking the feeding systems.
  
  Experience has shown that thinner pellets allow a more uniform combustion rate than thicker ones, especially in small furnaces. The length of the pellets affects the fuel feeding properties: the shorter the pellets, the easier to arrange for continuous flow.
• Wood pellet pressing machine ring dies are made from several different types of metal. Dies for wood pellet makers must be resistant to abrasion, strong enough to handle the forces of pellet production and corrosion resistant without negatively affecting productivity.
  
  The materials most often used are carbon steel alloy, stainless steel alloy and high chrome alloy. Obviously, the most expensive materials ensure higher resistances and productivities of the wood waste pellet machines.

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:
 

• The wood pellet raw material generates more resistant force while passing through the die than the force generated by the roller;
• 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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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