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Spray Dryers

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Antibiotics production, for example, often involves spray drying processes. Many ingredients in industrial processes also must be spray dried. Ceramic materials, paint pigments, detergents, catalysts, salts and a wide variety of other materials can be prepared by spray dryers. Read More…

Spray Dryers Food processing operations like milk drying make extensive use of spray drying procedures. Cereals, many kinds of coffee, teas, spices, egg-based foods and flavorings are often subject to spray heating processes in advance of packaging and consumption. Spray drying is also used in the development of a wide variety of healthcare and pharmaceuticals-related products.
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Leading Manufacturers

Louisville, KY  |  502-969-3171

Carrier is a manufacturer of high quality dryers in addition to many other related products, including coolers, screens, air knife separators, spiral elevators, feeders & conveyors.

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Carrier Vibrating Equipment, Inc. $$$

De Pere, WI  |  920-336-5715

Dürr Megtec provides customized systems for: regulatory compliance; improvement in working environment and in neighbor relations by reducing odor from industrial processes and helping to reduce greenhouse gas emissions and process energy management.

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Dürr Systems, Inc. $$$

Watertown, WI  |  920-261-8107

Established in 1980, Baker-Rullman Manufacturing, Inc. is a leader in the engineering, design, and fabrication of rotary drum dryers, modular steel bins and hoppers, structural steel, feed and seed mill systems, and custom metalwork. At Baker-Rullman Manufacturing our team of experienced, knowledgeable engineers are ready to get your project off the ground. With more than 30 years of project management experience, we can develop custom designed turn-key solutions to meet your needs!

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Baker-Rullman Manufacturing, Inc. $$$

Green Bay, WI  |  920-468-1000

Since 1951, FEECO has designed and manufactured both direct and indirect rotary dryers for a variety of industries around the world. All dryers are customized to fit the unique processing requirements of the material, with material testing/process development assistance available, in addition to post-sale support including inspections, parts replacement, and more.

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FEECO International, Inc. $$$

Carnegie, PA  |  412-788-9810

For over 125 years, Heyl Patterson has custom-engineered thermal processing solutions that are trusted in dozens of industries worldwide. We specialize in high quality drying equipment, such as Rotary Calciners, Rotary Dryers, Fluid Bed Dryers, Flash Dryers, Disc Dryers, Sludge Dryers, Conduction Dryers and Soil Remediation Units. Our pilot plant testing lab helps determine the best technologies and equipment for any application, and we support our clients for the life of their equipment.

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Heyl Patterson Thermal Processing $$$
placeholder image Carrier Vibrating Equipment, Inc. Dürr Systems, Inc. Baker-Rullman Manufacturing, Inc. FEECO International, Inc. Heyl Patterson Thermal Processing

Depending on the material being dried, spray dryers can use heated air or heated inert gasses; when combustible materials must be dried, gasses like nitrogen are used to minimize reaction risks.

Spray dryers are industrial drying systems that combine the processes of atomization and heating to dry a material. Atomization is the process by which a material is dispersed into extremely fine droplets. In spray drying, a material that is intended to be dried is mixed with a liquid and forced at high speeds into a chamber by a nozzle. Heat is then forced into the chamber, causing the liquid to evaporate and leaving behind fine solid particles.

The spray drying process begins with collections of materials to be dried and a solvent (which is often water). When the solute and solvent are mixed, the sludge or slurry created by this mixing are spun centrifugally and then forced through an atomizing nozzle at high speeds. While suspended in the drying chamber into which the material has been injected, it is exposed to a heated gas.

The solvent falls to the bottom of the chambers as the liquid solvent vaporizes. The dried materials are collected and prepared for the next phase of processing. The evaporation rate and the necessary size distribution of a product determine how much air is needed, which then affects the size and cost of most system components. As a result, these are the most important factors when designing a spray dryer.

Spray drying is often used when the product must meet exact requirements in terms of particle size distribution, particle shape, bulk density, and residual moisture content. Advantages of spray drying over other industrial drying processes include particle size control, enhancing flow properties of dry solids, evaporative cooling, corrosion reduction and short residence.

Spray Dryer Informational Video