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Industrial drying machines are designed to remove moisture from your product. But the drying process must cater to variations in the state of matter and molecular structure of the input material. Industrial dryer technology exploits the modes of heat transfer (convection, conduction, radiation, evaporative cooling) to control the moisture content.

Drying

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

Purposely focused on the indirect heating and drying of slurry, filter cakes, powders, pastes and granulates at a high speed - Dispersing liquids quickly and transforming products such as filter cakes and slurries from centrifuges, wet solids from decanters and press cake after press filtration into dry powders are among its striking features.


<h2>Continuous paddle dryer for rapid and effective indirect drying</h2>
This continuous paddle dryer from Hosokawa Micron is a high-speed dryer. It consists of a fixed cylindrical chamber with an eccentric agitator inside and two independent movements, perfectly capable of rotating on its own axis and tangentially to the cylindrical chamber too.

It has a patented jet rotor design, which allows the injection of a gas or liquid through the paddles and into a thin layer of material as it spirals along the cylindrical wall of the unit. This continuous paddle dryer is designed to be utilized with a variety of heat sources and for other numerous applications, not to mention its speed and effectiveness.

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Continuous paddle dryer

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

For gently drying liquid concentrates into granulates or powders, a vacuum drying solution is the most energy-efficient process. Offering gentle drying with control over product characteristics, a bespoke vacuum drying solution can meet the most demanding requirements of the food or pharmaceutical industries.
<h2>Continuous vacuum belt dryer for efficient, gentle drying of concentrates</h2>
Devex vacuum dryers are designed for continuous loading of liquid or solid products and the continuous discharge of dried granulate. The end product is discharged in GMP clean room conditions ready to be further processed, making this ideal for food and pharmaceutical uses.

Due to the vacuum, very low water evaporation temperatures can be achieved. This preserves aroma and product colour. Changes to the vacuum process enable control of bulk density and other product characteristics to your requirements.

The Devex vacuum belt dryer is able to operate a vacuum from 10 to 80 mbar to suit all production requirements with a continuous belt surface of 200 to 300 metres.

The Devex belt dryer is able to handle liquid products, concentrates and viscous products all whilst resulting in the best quality end-product. The fully closed belt system means no mechanical handling stress on product, no oxidation, and no environmental pollution.

Continuous vacuum belt dryer

Traditional drying methods in the pet food, aquafeed, and extruded food industry can be the most energy-consuming process. A state-of-the-art, compact and competitive solution, suitable for continuous drying applications can reduce your energy costs and downtime while maintaining high moisture uniformity.


<h2>Energy-efficient continuous drying with high moisture uniformity over time</h2>
The Geelen Counterflow Continuous dryer reduces the cost of energy consumption by 15-25% compared to its competitors for any drying requirements. It partially recirculates the dryer air back into the heater, maximizing energy efficiency while only a limited volume of air is exhausted at high relative humidity.

The counterflow technique also helps it achieve high moisture uniformity after drying. Its online microwave moisture sensors allow you to make sure the target moisture percentage is automatically achieved, under all circumstances.

Designed for easy cleaning, it is especially useful for hygienic operations for example, in the food processing industry. Its hydraulically driven drying decks release all of the product to the next stage is befitting with any production requirement.

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Continuous dryer machine

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

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

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

Find production technology for Wood pellets drying, and connect directly with leading machine manufacturers worldwide

Wood pellets drying

Which wood pellets drying equipment do you need?

Continuous paddle dryer

Belt dryer for wood

Continuous vacuum belt dryer

Continuous dryer machine

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