Vacuum drying

With innovative vacuum drying, Ebbecke Verfahrenstechnik offers fast, energy-saving drying of sensitive products

Spray drying

Removal of moisture under cost-optimized conditions

Vacuum drying produced at low cost

The production of low residual moisture, especially with porous particle structures, requires long drying times, high drying temperatures or a high vacuum. Temperature-sensitive products can often not be dried efficiently or only with difficulty.

Vacuum drying offers the advantage of a low temperature load with fast drying times. Due to the previous system configurations, vacuum drying was an efficient but expensive process. The existing system designs could only be operated with considerable investment. Ebbecke Verfahrenstechnik AG has developed a new vacuum drying system to reduce this cost structure so that large quantities of the material to be dried can be dried using a flexible and modular system. This results in cost savings of up to 40 % for comparable products.

Highly efficient drying with modular systems

Technical data

Modules: perforated trays for ultra-fine powders, troughs for powders with medium particle size ranges, perforated boxes for granulates - stackable, troughs with pneumatic drives comparable to drum dryers
Drying chamber length: 16.7 m
Drying chamber height: 2.70 m
Temperature profiles: up to 90 °C
Vacuum: 40 mbar
Your cost advantage: - 40 %
Process control: continuous by means of process control system with moisture measurement sensors
Analysis: can be analyzed in our chemistry laboratory using moisture measuring scales, Karl Fischer titration, hydro tracers and annealing

Gentle processes for sensitive powders and pigments

Areas of application

We offer drying processes for a wide range of demanding products – from special plastic granulates and detergent additives to cosmetic powders, coating additives and pigments. We use state-of-the-art plant technology to ensure optimum residual moisture, consistent product quality and high process reliability. Depending on the material properties, we select the right drying system to process your products gently, energy-efficiently and reproducibly.

Frequently Asked Questions About Vacuum Drying

What is the advantage of vacuum drying for sensitive products?

Vacuum drying allows for gentle drying with reduced thermal stress. This is particularly beneficial for sensitive powders, granules, or porous particle structures, where high temperatures could compromise product quality.

For which materials is industrial vacuum drying suitable?

Industrial vacuum drying is suitable for, among other things, specialty plastic pellets, detergent additives, cosmetic powders, coating additives, and pigments. Key factors include material properties such as temperature stability, particle structure, target residual moisture content, and desired process reliability.

What process data is relevant for vacuum drying?

Relevant process parameters for vacuum drying include temperature profile, vacuum level, drying time, initial moisture content, residual moisture, and product movement. Ebbecke specifies temperature profiles up to 90 °C and a vacuum of 40 mbar as technical guidelines.

How is the residual moisture controlled during vacuum drying?

Residual moisture can be monitored during or after vacuum drying using process control systems and moisture sensors. Laboratory analyses can also be performed, such as using moisture-measuring balances, Karl Fischer titration, Hydro Tracer, or annealing.

Why is a modular vacuum drying system a good choice for large quantities of product?

A modular vacuum drying system is advantageous because different products can be dried in suitable container or tray modules. This increases flexibility when handling ultrafine powders, medium-grain-size distributions, and granules, and facilitates reproducible contract drying of larger quantities.