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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. Drying technology exploits the modes of industrial heat transfer (convection, conduction, radiation, evaporative cooling) to control the moisture content.

Drying

Belt dryers are suitable for continuous drying and cooling applications. They use heated air or an inert drying gas to remove the moisture, as the product passes through a drying chamber, on a perforated belt. Belt dryers are suitable for industries producing pelletized or granular, dry bulk products.

Continuous

A belt dryer typically applies the product through an infeed chamber onto a perforated horizontal belt, which carries the product through the drying area which is divided into several sections.


<h2>Carefully controlled, high through-put, hygienic drying</h2>
The belt dryer from Ventilex is a stainless steel perforated horizontal belt, designed for durability, sanitation; it controls temperature and humidity as required, delivering desired levels even with varying air inlet conditions.

Helping the industry to produce better quality products, controlling temperature / humidity environment while minimizing utility usage and maximizing production rates. Besides the drying of food and agriculture products such as flaked, striped, noodle, cube and granule materials; it can also be used for dehydration of various chemical and pharmaceutical products.

The dryer capacity, size and performance depend on the available heat transfer area and the operating conditions for the specific product. The combination of temperature cycles and drying times can be adjusted to control the final product physical properties.

Hygienic belt dryer

solid

Many industries that process materials in pellet, powder, or crumble form need a closely controlled drying and/or cooling process to ensure product quality. This line of cooling/drying conveyors provides this function in a highly flexible, modular design configurable to any industry.


<h2>A completely modular line of drying and cooling conveyors</h2>
Amandus Kahl’s line of cooling /drying conveyors is configurable to meet the cooling and drying needs of any industry that deals with pelletized or granular dry bulk material. Process air is drawn through a layer of the customer’s bulk product as it travels along a conveyor. The conveyor bed is either composed of slotted plates attached to driven chains, or a full fabric belt depending on the characteristics of the product being cooled or dried. The belt speed is adjustable and used along with configuration of the overall belt length to precisely determine the product retention time. For enhanced drying, process air can be heated to 200 C, but drying can also be achieved using only air at ambient temperature. Cooling is also controlled and enhanced by the characteristics of the process air and overall product retention time. The modular design of the line allows the use of several layers of belts to be stacked on top of one another and a wide variety of belt widths and lengths are available. Airflow through the array of belts can also be uniquely configured to accommodate a wide variety of process needs.

Belt dryer/cooler for pellets and granules

Temperature control is a crucial aspect of your commercial production and cooling systems are applied to a range of industries. Industrial cooling equipment varies according to the consistency and temperature conversion demands the material you are handling, but the process typically involves heat exchange treatment as your products are conveyed through a cooling chamber equipped with extraction fans or circulating water.

Cooling

A pellet mill is a type of mill used to make small, round, compressed, pellets from powdered materials. Selection of a suitable pellet mill requires consideration of the desired pellets size and shape, nature of the material to be processed, ease of cleaning, and the scale and mode of pellet production. In the animal feed and pet food industries, pellet presses are used to combine various nutritional ingredients into each pellet. In biomass combustion, a pellet mill is used to increase bulk density and provide a consistent, easy-to-handle input product made from raw materials such as sawdust.

Pelleting

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

liquid

Freeze drying is the most gentle and aroma protective method of drying, widely used in the coffee industry, but also with applications in the food industry and pharmaceutical sector. Specialist continuous freeze drying plants are bespoke designed to meet your exact requirements and deliver a superior end product.
<h2>Continuous belt freeze dryer for gentle handling of delicate product</h2>
The Devex continuous vacuum belt freeze dryer is the ideal solution for continuous freeze drying of granulates. It allows gentle batch feeding and discharge via vacuum sluices to preserve product quality and minimize mechanical handling - perfect for delicate products where maximum retention of aroma, taste and colour is vital such as coffee products, pharmaceuticals, fruits and herbs.

A bespoke Devex freeze drying plant can handle the full product cycle: foaming, freezing, granulation, sieving, sublimation inside the belt dryer, ice condensation, heating system and high-vacuum technology.

Continuous belt freeze dryer

The drying of poultry manure digestate requires careful and consistent moisture level control. A sustainable and cost-efficient solution which uses the residual heat at biogas installations can be used to dry wet digestate, then converted to dry and valuable biomass or used as an organic fertilizer or litter in stable boxes.


<h2>Save energy consumption with a cost effective and sustainable dryer for digestate</h2>
The Dorset drying system uses the residual heat produced at biogas installations for the drying of manure and digestate remaining after anaerobic processes. It can be used year-round and is a cost-efficient alternative to the emergency cooler. The electricity consumption on this system is relatively low. It also keeps the airflow through the product extremely low, to prevent dust from being generated.

One of the primary technical advantages of the belt dryer for digestate is its smooth coated perforated steel plates. Its sturdy belt permits a thick layer of manure (15 – 18 cm) to be evenly distributed across the full width of the plates, ensuring a highly efficient drying process. The efficiency of the belt allows the dryer to be constructed in a compact configuration.

The dryer operates fully automatically and requires no manual input. It can be monitored remotely if required. It can help you achieve various end products depending on the input and the techniques used.

Belt dryer for digestate

If your water treatment plant often facing difficulties with sewage sludge deposits, drying the sludge may be a solution. It can provide a sustainable and cost-effective way of recycling sewage sludge into fuel or biosolids and make good use of residual heat throughout the year.


<h2>Save operational costs and reduce emissions while drying sewage sludge</h2>
Dorset’s plate belt dryer offers you an efficient and uniform way of drying sewage sludge to be recycled. It uses a belt of perforated steel plates which significant lowers air resistance, resulting in the lowest electric energy consumption of the ventilators.

Post dewatering of the sludge, a dry matter content of 90% can be achieved using the belt dryer for sewage sludge. The dryer plates are galvanized and powder-coated, in order to provide enough protection against aggressive substances. It can also carry a high layer of product on top. It has been configured with wide holes such that the belt does not need cleaning. Its heat recovery unit provides you with an increase in heat-efficiency.  All of its features ensure that your end products continuously have homogeneous qualities after the drying process.

Belt dryer for sewage sludge

The drying of extruded products is highly energy-demanding in traditional belt dryers that use gas or steam. A sustainable solution is reducing TCO (total cost of ownership) and energy consumption for e.g. the evaporated water, by making this process 100% electric. The production of ​high moisture uniformity is thus used in the aquafeed and pet food industry, maximizing output while minimizing costs.


<h2>Save energy​ ​and reduce TCO while drying extruded products</h2>
Geelen Counterflow’s hybrid gas dryer is an electric dryer that increases the efficiency of the drying process by recovering energy from the exhaust air. This is achieved by passing the warm wet air through an energy recovery unit, where cold water from ​an electric heat pump triggers condensation, thereby recovering energy and transferring it to the water traveling back towards the heat pump. Thus, the equipment allows you to run the ​entire dryer on electricity instead of gas or steam​. Unlike crossflow dryers that typically consume 2700kJ of energy per liter of water, this electric version with counterflow technology can achieve the same under 1000kJ. Also, an optional hybrid configuration provides a temperature ‘boost’ function for higher drying air requirements as well as being a redundancy heat source.

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Industrial heat pump dryer

The industrial belt dryer by Pigo is a simple yet super effective fruit and vegetable drying solution. If you are looking for a conveyor drying process that is 2-3 times quicker than the average industry standard belt drying system while maintaining product quality, such equipment may be the best way to go.


<h2>Multistage low-temperature industrial conveyor belt dryer</h2>
The PG-135 industrial belt dryer by PIGO is a sustainable solution for quick and efficient drying without ruining the quality of the final product.

Due to the technology the PG-135 uses, the drying time is reduced by up to 25% while consuming less energy without ruining the quality or texture of the individual products. Furthermore, whether the product is heavy, light, soft, sticky, or fragile, the unit’s fully operational multistage drying process is also equipped with several heat exchangers that can control the temperature in each drying zone to suit the individual characteristics and requirements of the product.

Industrial belt dryer for fruits and vegetables

Extracting the essential acids and compounds from fruits and plants is a complex process. But the drying stage can jeopardize their natural characteristics. The aromas, flavors, and other organoleptic properties of the volatile substances are crucial to producing quality fruit powders and plant extracts.


<h2>Preserve delicate compounds with gentle freeze-drying</h2>
The DryBand system for freeze-drying by Bucher Merk is designed for fragile substances such as fruit powders and plant extracts. The technology treats materials with low-pressure vacuum drying starting from 0.5 mbar, which can go up to  50 mbar.

The belts in the continuous drying system are used in series and products move between the top and bottom for an extended residence time. The freeze-dryer is suitable for lab-scale to large-scale lyophilization with a feeding range of 2 kg/h to 4,000 kg/h n. The system supports automated independent heated zones, and the final section can be adjusted as a cooling zone.

Continuous freeze-dryer for fruit powders and plant extracts

Delicate fruits with high moisture levels, such as berries, risk losing their properties when exposed to drying. Destroying volatile compounds and acids, even under low-impact conditions, leads to a loss of nutrients, flavors, and aromas. Moisture release is critical for extended shelf life, but the technology for making fruit powders must protect the bioactive properties from degrading.


<h2>Maximize retention of volatile molecules in fruit powders and berries</h2>
The Zeodration system by Bucher Merk uses an adsorption method that selectively draws water but retains the natural compounds. The heart of the unit is a reactor made from zeolite, a crystallized clay with a narrow pore diameter. At the same time, this water-trapping material minimizes the release of volatile compounds from fruit and fresh products.

A low-pressure environment of 0.5-30m bar makes the technology suitable for freeze-drying and processing delicate materials like berries, plant extracts, or herbs without compromising their aromas. Meanwhile, the reactor attracts water molecules, reducing residual moisture to 0.5%. Zeodration integrates into vacuum and lyophilization systems and handles batch and belt operations.

Freeze drying system for berries and fruit powders

Organic volatile compounds from fruits and vegetables are essential to manufacture reaction flavors, plant extracts, and fruit powders. But elevating temperatures during the evaporation process risks altering their chemical structure and lowering the quality of the final product.


<h2>Gentle freeze-drying for fruit powders, plant extracts, and reaction flavors</h2>
The DryBand system by Bucher Merk is a dynamic belt dryer designed to freeze-dry delicate food ingredients. The material moves through an intermediate vacuum chamber between the top and bottom belt section. The drying unit has a vacuum range of 0.5 to 50 mbar and a feeding rate of up to 4,000 kg/h.

The continuous system can be configured for variable or constant drying with heating plates underneath the belt. A crushing device at the discharge end breaks the dried products into powders after drying. Meanwhile, the vapors are collected in an integrated condenser.

Vacuum belt dryer for fruit and vegetable extracts

Belt dryers

<span style="font-weight: 400;">Any coffee-drinker can agree that a cup of coffee in the morning can brighten up their day. As the most convenient way of making coffee, many people choose to make coffee at home. Whether you want to make Moka coffee or filtered coffee, you need ground coffee grind appropriately for the coffee brewing method of your choice. These ground coffee are manufactured by roasting and grinding processes. </span>

Ground coffee

Stock cubes, also known as bouillon cubes or broth cubes, have been used in cooking for centuries. Think that, the first written version of a stock cube comes from Anne Blencowe’s recipe book from 1694. Made of dehydrated vegetables or meat stock, the bouillon cube production line consists of mixers, homogenizers, cube forming machines and packaging machines.

Stock cubes

Chinese legend has it that tea was created by accident over 2700 years BC. A servant boiled drinking water for his emperor when leaves from the Camellia sinensis tree fell into it – and the emperor decided to taste the drink. While to make tea nowadays on a medium to large-scale you need tea processing equipment like dryers instead of just a tree and wind blowing it, mythology adds a special flavor to the tea industry story.

Food powder is the result of drying and pulverizing food. It has been around since the astronauts when out to space. Fruits have a short shelf life and are difficult to preserve due to their high water content.  Fruit powder processing allows you to keep the nutrients of the fruits for a longer time, even off-season.

Fruit powder

Fruit dehydration is the earliest form of food preservation, with the earliest written record of dried fruits dating back to ancient Mesopotamian tablets, which contain the world’s earliest known recipes. Today, some of the most popular dried fruit snacks are raisins, dates, mango, pineapple, prunes, figs and apricots. Dried fruit processing equipment helps preserve the nutrients and sweetness of the fruit and prolongs its shelf life.

Dried fruit

If you like a warm and easy breakfast, oatmeal can be a great option for you. Oatmeal, most commonly known as rolled oats, is prepared oats ready to consume in a form of porridge or cereal. Other than rolled oats, there are other types of oatmeal - such as steel-cut oats, quick oats, and instant oats. You first need to prepare clean oat groats - the hulled kernels of wild oats, and you can decide which oatmeal processing equipment you would like to set up and depending on the oatmeal of your choice.

Oatmeal

Only one percent of the entire plant species on the planet produces essential oils, but that amount has found its way into various products, from perfumes to foods. Flower extraction systems are similarly diverse, and picking the right ones depends on the organic material and the final product.

Flower extract

Echinacea, also known as coneflowers, are brightly hued flowers with distinguished, cone-shaped flower heads. Over 200 medicines in the world are derived from coneflower extracts. Echinacea processing was introduced by Native Americans who were interested in the plant's medicinal qualities.

Echinacea extract

Panax ginseng is a medicinal plant with a long history steeped in myth. The term “panax” itself is derived from a Greek word for “panacea” or “cure all”. As ginseng processing technology continues to develop, this famous traditional extract keeps finding new applications.

Ginseng extract

What’s the only living connection between our present world and the age of dinosaurs? The ginkgo biloba plant. Also known as the maidenhair tree, it is regarded as a living fossil and has been around for more than 200 million years. Ancient civilizations in China were already mastering ginkgo processing centuries ago and the tradition soon flourished around the world.

Ginkgo extract

Koala bears diet exclusively on eucalyptus leaves. But the large concentration of cineole in the tree keeps most other predators at bay. Humans, though, discovered ways to extract the substance and use it as a remedy against inflammations and other diseases. The eucalyptus oil production process keeps evolving to maximize yields, ensuring enough eucalyptus forests for koalas.

Eucalyptus oil

Tea tree oil, also known as melaleuca oil, is an essential oil with immune system stimulants produced mainly in Australia. The tea tree oil manufacturing process starts from the leaves of Melaleuca alternifolia. In terms of market value, the one for tea tree oil was valued at 38.8 million USD last 2017 and is projected to increase to 59.5 million USD by 2025.

Tea tree oil

Poultry feed

The fishmeal powder market forecast shows that its global market value will reach USD 10.3 billion by 2025. Expanding since 2019, at an annual growth rate of 6.5%. Fishmeal powder production has strong business potential with the increase of applications in animal feed, pet food, and fortified foods.

Fishmeal powder

Extruded aquafeed

There are two misconceptions about floating pellets. The first one is that they are made with a pellet mill, when the proper floating pellets-making machines are extruders. The second misconception is that floating feed is only used for fish. However, many other species consume feed on the water, such as crocodiles and birds.

Floating pellets

In aquafeed, you can find three types of pellets: floating pellets, sinking pellets, and slow-sinking pellets, because not all aquatic species eat at the same height of the water column. In the case of bottom feeders such as shrimp, river crab, sea bass, and some species of catfish, they eat sinking pellets. Contrary to tilapia and carp that feeds from the surface with floating pellets. Sinking pellets production must control water stability to preserve the quality and form of the pellets, avoiding nutrients' dissolution in the water.

Sinking pellets

Around 1860, American businessman James Spratt made dog biscuits by mixing vegetables, flour, beetroot, and meat. His novel idea came after he noticed dogs eating leftover biscuits from ships in England. Following the commercial success in Britain, he started production in America, and it didn’t take long before others developed their own baked pet food formulas. But the need for more palatability led to experiments beyond the oven. In 1956, extruded dry pet food production made its splash on the market.

Dry pet food

Limestone

Chicken manure

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 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

Straw

Plant waste

In 1682, Denis Papin found a method to remove collagen from animal bones, discovering gelatin. But it was the inventor Peter Cooper who developed gelatin powder processing. In 1845 he secured his invention with US patent 4084 for a dessert of gelatin powder called “portable gelatin”.

Gelatin powder

Your body does not discriminate between proteins coming from meats and those coming from plants. From a nutritional point of view, they all have the same value. But chewing on a portion of pumpkin protein does not feel the same as a cut of meat - the texture is completely different.

Textured Vegetable Protein

Brewers' grain, also known as brewers' spent grain or BSG, is the residue of malt and beer production. This brewing by-product is sometimes wasted causing an important environmental impact, nevertheless, with the circular economy in mind, brewers' grain processing can turn waste into value mainly for the feed and food industry, tackling some of the sustainable development goals (SDGs).

Brewers grain

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