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Wood pellets milling Equipment

Milling machines are used to reduce the size of material by cutting, crushing, or grinding it. The choice of industrial milling equipment depends on the industry and the materials to work with. Besides, there is a significant difference between those aimed to remove layers from metal or other materials workpieces and those designed to reduce particle size for materials that come in bulk.

Milling

Building a fire with wood sticks and logs is one of the most wholesome experiences. But it would take a lot of trees to heat up our homes. Instead, the fire-stoking power of plant material can be concentrated in a wood pellet, boosting its burning efficiency. However, wood pellet making equipment and machinery involves more than just the compaction of sawdust. Processing high-quality pellets from biomass can be as intricate as loading a fire-lay.

Wood pellets

When you want to mill soft to medium-hard plastics in the fineness range of several hundred µm to 2 mm, a fine cutting mill can be a good solution for you. Such mills are suitable for the communication of rubber, plastics, and other substances.


<h2>Smooth, cubic shape output with good flow properties</h2>
Fine Cutting Mill AFS from Hosokawa Alpine are commonly used in the size reduction of soft, medium-hard, fibrous and tough materials. A rotor inside the mill revolves at high speed. Different rotor geometries make mills adaptable to different material properties (medium-hard, soft, fibrous or elastic materials).

The feed material, usually between 4 and 8 mm in size, is fed into the grinding zone via the intake chute on the mill door. Size reduction takes place between the axially adjustable stator disc and the rotating grinding disc, which rotates at a high peripheral speed in accordance with the shearing and cutting principle. The actual grinding is effected in stages through a grinding gap which tapers from the inside to the outside. The finely ground product exits the grinding zone through an exactly defined gap.

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Fine cutting mill

Utilization of biomass for energy and other applications requires consistent and reliable compaction to increase bulk density and provide a consistent an easy to handle input product to subsequent processes such as combustion. This line of pelleting presses has been under development since the energy crisis of the 1970’s and is well suited for today’s renewable raw materials industry needs.


<h2>Robust biomass pelletizers with impeccable pellet quality and high up-time</h2>
Amandus Kahl produces pelletizing presses with proven success for many types of biomass including wood, straw, dried forage, and agricultural byproducts among many others. The presses use pan grinder rollers to compact the biomass and force it through a flat pelletizing die forming continuous strands of compacted product. The strands are then cut to the desired length using rotating knives. The pan grinder rollers and knives rotate slowly ensuring optimum pellet quality and minimized generation of noise and heat.

The grinder roller gap and strand cutter are adjustable for optimized pellet quality for the customer’s particular needs.  The presses are designed for maximized plant up-time and include reinforced press chamber, die supports and cutting knives, oversized and permanently lubricated roller bearings, and active gearbox lubrication. The flat die design ensures even distribution of feed material and optimized pressure in a more compact package than traditional ring die type presses. Amandus Kahl has pelletizing presses with capacities from 300 Kg / h to 8,000 Kg / h.

Pelleting press for biomass

Biomass fuels come in many forms and often include impurities that can damage equipment and cause process disruptions.  Successful biomass energy conversion operations invest in equipment that reliably removes impurities and processes raw fuel material into more consistent forms suitable for use in modern boilers.


<h2>Robust and easy to maintain screening and pre-processing equipment for biomass energy conversion</h2>
Raumaster has been working in the wood processing and energy industries in Finland for over 30 years.  The company is a world renowned expert in biomass material handling solutions and offers a line of screens and crushers that prepare your raw biomass fuel before it reaches your boiler.  All raw biomass fuels inevitably contain some impurities such as stones, metal, and oversized particles.  These are removed from your fuel stream by disc screens, gyratory screens, vibratory screens, and air classifiers before they can damage equipment or interrupt the process.  Magnets, metal detectors, and eddy current separators are also used when a high degree of metal contamination is present.  Crushers are available with slowly turning shredding heads or cutting drums with higher rotation speeds depending on the nature of the raw biomass input and the desired particle size for subsequent processing.  The screens, separators, and crushers are combined and implemented in your plant as a complete optimized solution tailored specifically to your raw materials and process.  All equipment is designed for reliable operation with low maintenance costs.  Effort has been made in all equipment designs to give reliable operation and very easy maintenance.

Solid biomass screening and crushing equipment

At the industrial level, the application areas of pellets range widely in fields such as feeds, biomass, wood chips, sawdust, and other renewable raw materials. To adapt to the most diverse requirements, the pelleting presses must have a modular design while keeping maintenance costs low and providing a long service life.


<h2>Producing pellets using a modular pelleting press with an energy-efficient direct drive</h2>
The MAXIMA Pellet Mill from SALMATEC is an industrial-grade pelletizer capable of producing pellets for various applications like feeds, woodchips, recycled plastics, and many more renewable raw materials. The system has a vertical ring die with optional 2 or 3 rollers that can be equipped with a cooling system. The rollers press the product through the ring die at the highest possible pressure before cutting it down to the right size with its adjustable knife. The system has a lifting frame to support heavy parts such as rollers and dies removed during maintenance.

The unit has a central lubrication system that automatically lubricates the rollers and the main bearings. A maintenance drive is equipped inside a well-ventilated housing for larger units to ensure slow and safe die rotation for work on the press tools. The system is made from high-quality materials and complies with the latest safety standards and guidelines. The Maxima provides energy efficiency and equal power transmission thanks to a one-step operated v-belt drive. The system is available in various capacities of up to 50 tons per hour, depending on the type of machine and product application.

Industrial pellet mill

Large industries are shifting towards more environment-friendly technology, such as recycling wastes and utilizing them as an alternate energy source. For instance, sawdust and wood chips from wood mills are collected and processed into pellets which can be used in households or large industrial plants as a source of energy for heating systems. Plastic waste can also be recycled and made into pellets. Later these will be used in injection and molding machines to produce bottles, containers, or bags.


<h2>Turning wood and plastic byproducts into uniform pellets using a complete pelletizing system</h2>
The Complete Pellet Line from SALMATEC is a pelletizing system that includes multiple processes from conditioning raw materials and turning them into uniformly sized pellets. The entire system is specifically designed for the required product specifications. The conditioner helps the products achieve the optimum amount of moisture before feeding them to the pelletizer. The moisture content of raw materials can be controlled through a conditioning system in which the product moves inside a chamber while steam is also injected.

The pelletizer can be equipped with 2 or 3 rollers and multiple knives to cut the extruded products from the die into the necessary pellet size. The pellets then go to the cooler to prevent them from sticking to each other before storing them for at least one day in the silos. This process allows the structure of the pellets to stay intact and prevents them from breaking into tiny particles. Each complete system is designed according to the desired production capacity, raw material input, and high safety standards.

Complete pellet line

As the worldwide demand for power keeps growing, the energy sector is diversifying its mix of sources. Pellet fuel offers a fossil-free alternative suitable for industrial and domestic sectors. But turning raw biomass, into pellets that comply with standards is a specialized process. Pellet fuel manufacturing equipment combines materials and additives to produce pellets of uniform size, density, and moisture content.

Pellet fuel

Pelleted feed

Salmatec is a manufacturer of pelleting presses, assembly components, and complete units. Based in Germany, the supplier offers solutions for feed, renewable raw materials, and recycling industries.

Your sawmill is churning out heaps of waste. Unless you’re turning your mill residues into bioenergy.

Wood processing industries in Europe and the United States generate a combined 150 million tons of residues every year. But its dusty characteristics make this material difficult to handle and it is often just disposed of as waste.

Sawdust, however, is anything but waste. With the right technology, it can be reprocessed into household-grade wood pellets and address demands for new bioenergy solutions.



<strong>But wood pellets are not simply compacted sawdust</strong>

In Europe, where an energy scare looms, consumers are stocking wood pellets for home heating systems. Unsurprisingly though, domestic-use pellets must meet strict certification requirements, explains Timo Müller, Marketing Manager at Salmatec.

“Unlike other pellet products, sizing is crucial here,” Timo tells us. “Wood pellets must adhere to a standard between 3.15 mm and 40.0 mm.” Pelletizers engineered for this type of pellets have special knifing technology that cuts pieces with millimetric precision.

Moisture control presents another critical challenge. The ideal water content in wood pellets hovers between 7%-9%. Moisture holds the milled dust particles together, but the pellets must be dry enough to burn efficiently and prevent mold growth. On the other hand, insufficient moisture makes them flaky.

The pre-pelletizing drying stage typically lowers water content to around 10% before a small amount of water is added again during the conditioning process. This moisture creates a homogeneous input material. But a conditioner does more than that, clarifies Timo: “It distributes particles evenly to enable a smooth production process.”

<strong>Giving wood waste a new lease of life</strong>

Producing wood pellets for domestic use is an intricate process. But it turns sawmill residues into a circular byproduct with a new purpose.

Equally important, as households are warming up to wood pellet stoves, it keeps the winter chills at bay.

Turn wood waste into good waste

Biomass

Energy is constantly changing, but it finds rest in a fuel. Once exposed to heat, though, these natural materials release their captured energy. Every aspect of everyday life – from manufacturing to digital services – is powered by the mastery of this complex conversion from fuel to energy.

Fuel

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Wood pellets milling

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Wood pellets milling Equipment

Which wood pellets milling technology do you need?

Fine cutting mill

Pelleting press for biomass

Solid biomass screening and crushing equipment

Industrial pellet mill

Complete pellet line

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