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DMR

FLASH MILL DRYER

The Drymeister (DMR) flash drying system is the first of its kind to be patented anywhere in the world. It was designed to combine drying, de-agglomeration / milling and classifying in one piece of equipment. The DMR flash dryer can dry temperature-sensitive products, safely, even under increased temperatures, in a matter of seconds!

The DMR is a continuous dryer, capable of processing bulk solids with a moisture content varying from a few % to more than 80% in suspensions, slurries, pastes, filter cakes and wet powders. It requires 50% less space and uses about 30-40% less energy per kilogram of evaporated water, compared to other direct drying technologies.

WORKING PRINCIPLE

In the DMR flash dryer, the wet material is fed through customized feeding systems into the milling and drying section of the dryer's main body. The milling rotor disperses the wet material into very fine particles and the fine particles are fluidized in the milling chamber by temperature-controlled, hot gas coming in from the air heater.

The hot air (or inert gas) can be heated up to 650°C and as the wet product is dispersed, it is reduced in size in the bottom section of the DMR flash dryer. The drying system is kept under a negative pressure by the exhaust fan and the surface area of the product is increased enormously so that water (or other solvents) is evaporated instantaneously.

The dry and fine particles are conveyed with the gas stream to the top section of the DMR flash dryer where a separator classifies the particles by size. Then the particles pass the classifier at the set cut point and are conveyed with the exhaust air to a powder-air separating system like a cyclone, cyclone filter or cyclone scrubbers.

The DMR flash dryer retains a fluidized bed of product in the drying chamber to ensure a low level of adhesion of wet material on the inside wall of the drying chamber. Moreover, process parameters like classifier speed and outlet temperature can be adapted to control moisture content and particle size of the end product.

Key features

Ultra fine regular end product
Thanks to its specially designed dispersion rotor, our flash dryers can produce ultra-fine powders in one step, from suspensions, slurries, pastes and dough, filter cakes or wet powders.

High evaporation capacity
Thanks to the combination of high ΔT with a good dispersion of the wet product in the air, our flash dryers can evaporate large quantities of liquids.

Compact design
Compared to other direct drying technologies, the flash dryer requires up to 50% less space.

Multi-purpose
Filter cake or slurry, in the same machine. Therefore, with the DMR, unlimited mechanical dewatering is possible before the final drying stage.

Easy access
Either for cleaning, inspection or maintenance inside the dryer, our flash dryers offer the best accessibility from the market, regardless of what size.

Various systems available
Open, closed- and recycle system concepts.

SPECIFICATIONS

Rotors
The DMR flash mill dryer is available in 3 different rotor types. Different mechanisms are used to achieve different particle sizes and to handle various materials. Geometry, dispersion principle and energy input also differ depending on the rotor.
- DMR type rotor
  Strong impact and air turbulence is generated by a high speed dispersion rotor called the multi blade: typical tip speed 110 m/s.
- MDH type rotor
  A horizontally-driven grinding rotor with swing hammers to take care of the milling/dispersion.
- MDV type rotor
  A vertically-driven grinding rotor disperses wet agglomerates and solids.

Models

We have models for dispersion and soft grinding (type MDV), intensive grinding (type MDH) and strong dispersion (type DMR). The DMR is available in several models. Our expert design and engineering team can help you specify the right dryer to meet your specific requirements. A number of models with their typical characteristics are described below. Please note that these values are indicative only. Detailed information on all models is available on request.

Model	[-]	DMR- 1H	DMR- 2H	DMR- 3H	DMR- 4H	DMR- 5H	DMR- 6H	DMR- 7H
Heigth	[cm]	194	300	330	360	450	500	550
Length	[cm]	140	170	230	240	360	450	500
Width	[cm]	70	120	150	160	160	260	320
Max. power grinding motor	[kW]	11	22	45	90	200	280	355
Min./max. power separator motor	[kW]	0.75/4	1.5/11	2.2/15	5.5/30	11/45	22/55	30/75

CONTINUOUS DRYING SYSTEMS

As a global developer, manufacturer and 'one-stop shop' supplier of powder processing systems and plants, Hosokawa Micron provides a wide range of both batch and continuous drying technologies. We carefully select, configure and integrate all components and processes in order to ensure the optimal functionality, quality and efficiency of your drying system.

Thanks to our long-standing experience, we are the ideal partner to transform your drying operation into a bespoke powder processing system, from incoming base ingredients to final products.

Learn more about our system solutions

ENERGY-SAVING DRYING SYSTEMS

Hosokawa Micron is an expert in developing advanced solids processing systems and we put a lot of our own energy into developing drying systems that will save you energy. The DMR flash mill dryer, for example, uses about 30-40% less energy per kilogram of evaporated water, compared to other direct drying technologies.

TESTING & PROCESS DEVELOPMENT

Test Centre in Doetinchem, the Netherlands

Our Test and Process Development Centre in the Netherlands offers unique possibilities for testing your product to determine the most efficient process, system or plant prior to final design. We can provide laboratory-level as well as production-sized trials.

Whether you wish to test a single machine or a complete powder processing system, the same skilled and experienced staff are here to help ensure that your requirements are met, and that you are entirely satisfied with the results.

We offer process equipment and technologies from individual units to large scale bespoke system solutions. Our principle is to deliver high performance yet affordable solutions that meet our customers' demands and long term challenges.

HOW CAN WE HELP YOU?

To learn more about our powder processing equipment and systems, contact us:

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