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Wood pellets pelleting Equipment

Pelleting equipment transforms powdered, mashed, or grounded material into a denser cylindrical shape. Pellet processing compresses the fine material against a perforated die, where it will be shaped and cut. Although granulating and extrusion also produce pellet-like products, manufacturing pellets is a distinct process.

Pelleting

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

Processing of wood and biomass into pellets or other volume reduced products requires careful and consistent moisture level control. This is a line of drying conveyors specifically designed for precisely controlled biomass drying.


<h2>A fabric belt dryer for Biomass</h2>
Amandus Kahl’s Fabric belt dryers use a closely knit plastic fabric belt to both transport a layer of product and allow hot air to pass through it for drying. The fabric belt also acts as an exhaust air filter to ensure limited dust loading as dust particles are trapped in the belt as the air is drawn through it. The dryers are particularly efficient, requiring inlet air temperatures of less than 120 C making them particularly well suited to make use of waste heat from other processes. The dryers operate automatically and relevant process parameters are monitored to ensure optimum and efficient drying.  To ensure a consistent and uniform final moisture content of the dried product even as the input raw materials vary in distribution of moisture content, a product supply system is included which evenly distributes material across the belt and turns it over during the drying process.

Belt dryer for wood

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

Food and feed industries require the highest standards of hygiene and sanitation. This entails frequent cleaning and inspection. There is also a need to closely control the cooling process in these industries to ensure product quality. A simple yet state-of-the-art pellet cooler can help improve sanitation standards, product quality and reduce Total Cost of Ownership.


<h2>Provides the cleanest and most efficient cooling technique</h2>
Geelen Counterflow’s Sanitary design cooler has been configured to meet the cooling needs of any industry while maintaining the highest standards of hygiene. It is especially useful in the cooling of animal feed and oilseeds as it is designed to allow easy access for inspection, the lowest need for cleaning, and the fastest cleaning times.

The cooler’s hood with a rounded top prevents the accumulation of liquids/solids and allows cleaning liquids to be drained off. Its new and smart design allows round air discharge thus eliminating low spots for fines or moisture build-up. There is also a collection trough that safely accumulates and channels the cleaning liquid into the floor drain.  It is also equipped with big access doors in bin walls and collecting hopper enabling fast and easy inspection and cleaning, without entering the cooler. There are no hollow spaces avoiding the risk of build-up in places that can not be accessed or cleaned.

The Counterflow Pellet Cooler provides full control over air volume, air quality, process time, relative humidity, temperature, and moisture. It also offers several upgrades with respect to your specific industry requirements.

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Counterflow pellet cooler

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

When processing wood-plastic compounds, conventional underwater pelletizing systems often struggle with achieving satisfactory levels of residual humidity, requiring substantial drying efforts that are both time-consuming and ineffective.
<h2>Pelletize wood and fiber compounds without excess moisture</h2>
The ECON Air Pelletizer ELG employs air instead of water for cooling and conveying pellets, eliminating the need for extensive drying processes. This system benefits from thermal insulation, ensuring a uniform cut and efficient conveyance from the cool cutting surface, avoiding chains and agglomerates. Additionally, this pelletizer is well suited for processing PVC due to its low inner specific heat and minimal cooling requirements. The air pelletizer can integrate with underwater pelletizing systems, offering flexibility and space-saving options, especially beneficial in laboratory settings. With throughput capacities ranging from 1 to 3000 kg/h, it provides scalable solutions adaptable to various production demands.

Air pelletizer for wood and natural fiber compounds

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 pelleting

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