Modular Continuous Drier
Gisip's continuous drier is suitable for both bulk and piece products. The continuous drier is assembled by modules to a suitable length to obtain an optimal drying process. The process is adapted to the drying characteristics diagram of the material which is determined by a number of parameters such as the shape of the material, the size of the product, the water content (before and after the drying process), the temperature, the flow of air and the migration of moisture in the material. Naturally, the dielectric qualities are also decisive. In the drying diagram all these parameters are mapped out and determined.
 

Development of the drying diagram is done at Gisip Microwave Center where a large number of parameters can be simulated in order to establish a drying diagram where optimum use of energy is combined with optimum quality of products.

A number of patented energy generators are placed in every module. Through the wave guides, which are placed in the roof of the oven, the microwave energy is supplied directly to the substance to be dried. By the control system of the module the supply of energy can be varied in such a way that it is always adapted to the present need of drying. The energy generators are placed outside the drier at the short sides of the modules where they are readily available for service and maintenance. In the energy generators, all microwave components have been assembled.

The height of the entrance and exit of the drier can be adapted to the height of the product to dry and can be made adjustable. In both ends of the drier there are efficient microwave traps, preventing microwaves from leaking out at the openings.

The ventilation system of the drier can be either separate, with an air handling unit integrated into the drier, or connected to the ventilation system in the building. In both cases Gisip can supply the entire system, with or without heat recovery.

Gisip designs and supplies a complete microwave drier including all necessary control systems, power cubicles and safety systems for personnel and machine. We install and put the plant into service on site and offer training of your technicians in maintenance and operation of the drier.

Modular continuous drier for drying of cellulose fibre. Drying capacity 5.4 kg water per minute. 
Microwave power: approx. 190 kW. 
Length of drying plant: 24 m. Width of conveyor belt: 1.4 m. Airflow: 25 000 m3/h. 
The drier is integrated with an external air treatment plant with heat recovery.

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Modular Continuous Oven
Inside the continuous oven liquid as well as solid substances are heated instantly. Liquid substances are placed in open containers to change its viscosity or for heating. Both liquids and solid substances, e.g. juices and fresh ready made dishes (catering), in sealed containers can be pasteurized. Solid substances can be softened, melted, fermented or merely heated.

In the pharmaceutical and cosmetic industry, instant heating of tablets, ampoules and capsules for increased shelf life can be done directly in final packages made from glass or other microwave permeable materials.

How the material is to be heated in the continuous oven is determined by the heating diagram, which is a description of the course of the process from the entrance of the oven until the material leaves the oven. The shape of the diagram varies with the material that is to be heated and the aim of the process. The heating diagram has been established by simulations at Gisip Microwave Center.

The continuous oven is assembled by modules, in the same way as the continuous drier, to make it possible to adapt to the current heating diagram. The continuous oven has control and safety equipment similar to that of the previously described continuous drier.

Modular continuous oven with conveyor and microwave traps at the entrance and the exit of the oven.
 
 

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Batch Drier and Batch Oven
The batch drier is suitable for drying of large, bulky products such as furniture, large ceramic moulds and sand moulds in casting shops.

The batch oven has an extensive use, for heating of large and irregularly shaped solid objects or for liquid substances that must be treated in batches, e.g. for sterilisation of hospital waste, heating of window frames for paint removal etc. Or briefly: everywhere where heating must be done in batches.

Technically the batch drier and the batch oven have similar designs.  The large chamber has energy generators mounted on the outside, which supply microwave energy through wave guides. The energy is evenly distributed inside the entire inner space of the chamber. The process is 
controlled by an adapted control and monitoring system which can be integrated with adjacent processes or other continuous production.
 

Batch drier. Drying of varnish on bulky coffins. Three driers in series. Microwave power: approx. 27 kW. Size: 3000x2900x1500 mm excluding stand.
 

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Batch Drier with Vacuum
 

This product is suitable for drying products vulnerable to heat and for vaporizing alcohol based solvents or for removing small residues of moist. It is also suitable for extracting useful substances from organic material. A combination with vacuum is required to be able to dry at a low temperature. This is often needed within the chemical, pharmaceutical and cosmetics industry.
 
 

The internal vacuum chamber is supplied with microwave energy from the exterior energy generators. The drying function developed by Gisip is programmed into the control function of the process. The function makes sure that the desired result is achieved while using a minimum of energy.

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Air Pocessing Units

Gisip has been producing air processing units for indoor as well as outdoor use for more than 35 years. We supply everything between simple air intake units and advanced air conditioning units. The units are sold separately but they are often a useful complement to our microwave products. The ventilation capacity of our air processing units range from 0.1 to 21 cubic metres per second.

Types of Air Processing Units

Air intake and exhaust units
Revolving
Single flat
Double flat
Counter-current
Heat pipe exchanger
Battery recovery

Complementary
functions

Evaporator
Return air
Return air + cooling
Evaporative cooling
Return air + evaporative cooling
 

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Energy Generators

In the microwave products made by Gisip there is one or more instances of the patented energy generator. Inside the energy generator all microwave components have been gathered. It is this unit that constitutes the energy source all over the plant. All components in the energy generator are carefully tuned to each other for optimum and reliable performance.

Inside the energy generator all microwave components have been gathered in one end of the unit, to make them easy to access for repair and maintenance. From the magnetron, which generates the microwave energy, the wave guides direct the energy to make it disperse evenly into the entire microwave chamber. The design of the wave guides allow microwaves to pass out from the magnetron but prevents reflected microwaves from reaching the magnetron. This arrangement increases the service life of the magnetron.
 

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