DRYER
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Drying Technology

A range of succesSful products manufactured by our customers

DORNIER-Drying Technology In many branches of industry, drying or heat treatment is an integral part of the manufacturing process and is necessary for the ultimate application or use of the finished product. This process stage can have a direct influence in satisfying the highest quality demands to be fulfilled by the end product. The main objective in the design and engineering of DORNIER dryers is to produce first-rate machines that fully meet the requirements of individual customers and in this way actively contribute to manufacturing a successful product. In an environment of...

Intermediate section for future extension Unloading sections Exit zone with conveyor belt drive Cooling section Conveyor belt Metal or plastic screen-type conveyor belts transport the product through the drying zones. The physical characteristics of the product such as wet strength, temperature, corrosiveness, etc. determine the specific type of conveyor belt. Decisive factors having an influence on usefull working life are: • optimal tracking of the conveyor belt combined with abrasionfree, non-contacting edge sensing • consistent edge formation (looped edges, welded edges) • correct...

The DORNIER Machine Concept Exhaust system Heating system DORNIER dryers are characterized by the following main features: • a high degree of integrity and performance due to the utilization of high quality materials, robust construction and state-of-the-art manufacturing techniques • low energy consumption • optimized nozzle ventilation • absolutely secure transportation of materials through modern screen conveyor belt technology • extendable modular design with adjustable temperature control • very consistent control of air flow and temperature • almost 100% availability with low...

The right solution for the panel industry In addition to traditional building materials such as solid wood and stone, other products have been specially developed in the form of panels for ceilings, walls and floors in both the commercial as well as the private sectors of the building industry. Depending upon how these panels are manufactured (e.g. using gypsum or cement, fiber reinforced, homogeneous or laminated), each individual component in the DORNIER Drying System is selected accordingly and engineered to specific requirements. At the end of the 70’s, an 8-deck dryer was developed for...

Modular drying zone A special set of nozzles within a drying zone (module) provides an even distribution of heated air over the entire width of the product. The geometric configuration of these nozzles together with a turbulent stream of air creates an optimum evaporation of moisture while minimizing the power consumed by the axial or radial recirculating fans to keep costs down. The air being circulated through the dryer is heated by means of gas or light oil burners, steam or heated oil radiators. Low emission burners have been developed to limit exhaust gas emissions. The board being...

... for the paperboard, cardboard and leather fiber industry Recycling has become a predominant factor in paperboard and cardboard manufacturing. This has resulted in a renaissance in the utilization of post consumer products as a substitute for virgin stock. A wide variety of packaging materials and shipping containers can be manufactured depending upon the by-products.

The DORNIER Loop Dryer extracts moisture from the flexible layer of paperboard as it continually passes through the drying zones. The loop dryer concept is also being applied in the processing of a continuous web of leather fiber. Vegetable or chrome leather is subjected to a careful drying process in the low temperature range (less than 100°C). Particularly stiff paperboard is passed in individual sheets through the DORNIER multi-level dryer and here again the specially selected screen-type conveyor belt ensures that a product with a fault-free surface is delivered to the subsequent...

DORNIER Dryers for nonwovens and filter materials Lightweight webs of material must not be allowed to lift away from the conveyor belt but remain securely in contact with it without a tendency to flutter. This is achieved by producing a difference between the counterflow of air above and below the web. This development (“differential backflow”) enables the current of air generated by the nozzles to be directed onto the material without throttling 3-zone thermal bonding plant the circulating air and this leads to an increase in the performance of the dryer. Since the stream lines are short...

Suction conveyor belt dryer for thermobonded nonwoven materials With its suction dryer, Lindauer DORNIER GmbH has a heat treatment machine in the delivery program that enables the manufacturer to produce air-laid nonwoven materials by thermobonding. Variations in the velocity of air over the entire width of the web are guaranteed not to be more than ±5% and variations in temperature are limited to ±1%. Automatic cleaning systems and easy accessibility to the air guidance system (suction boxes can be lifted) are features designed to simplify maintenance. By using a special reversing...

… for the foamed plastics industry The production of foamed plastic materials is a relatively new process. Typical products are to be found in the leisure activities market, automotive and sporting goods applications. During the foaming process, maintaining an even temperature is absolutely essential and this is achieved as a result of the modular construction and optimum process control. Various machine configurations provide individual solutions directly related with the type of cross linking process (chemical/physical) to be implemented. Using the DORNIER Foaming Oven (horizontally...

In an after treatment process, some tem) and separate ventilation sysproducts receive a protective and tems enable optimum adjustments to be made in accordance with difdecorative surface finish. ferences in the top and bottom High performance single-deck dry- coats on the boards. ers, operated with air speeds in excess of 30 m/sec, evaporate the water contained in the coatings. Tandem installations offer a high degree of flexibility (multi-layer sys- DORNIER Paint Dryer for two-sided surface coating