Natural circulation boiler & iNOOK

Our rapid steam generator

The INTEC natural circulation boiler iNook is a rapid steam generator that supplies production heat in closed water-steam circuits at high pressures - especially in the food industry. It is directly connected to the heat consumer.

The heat transfer surfaces consist of vertical tubes which are welded together via ribs.

Thanks to large cross-sectional areas in the pipes, high circulation rates are achieved, which minimize the thermal load on the heating surfaces.

The exclusively vertical orientation of the heat exchanger tubes enables water to circulate in pure natural circulation, so that a feed water pump is not necessary.

Natural circulation boilers are used in Industry sectors where there is a constant demand for steam and the load is relatively stable. INTEC builds and supplies user-specific water tube boiler systems that are designed in different pressure and performance ranges.

How natural circulation boilers work

It is based on the principle of density differences between water and a water-steam mixture. Condensate from the consumer is introduced at the lowest point of the rapid steam generator.

As the condensate flows through the rapid steam generator, it is continuously evaporated in the pipes by the combustion. The density difference between the water-steam mixture and the condensate creates natural circulation (natural convection).

The generated water-steam mixture flows into an elevated collecting pipe (steam drum). From this collecting pipe, the condensate flows back into the natural circulation boiler, and the steam is supplied to the consumer.

Through heat transfer in the consumer, the steam condenses, and the condensate is then returned to the natural circulation boiler via a downpipe.

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Natural circulation boiler & iNOOK

INTEC - Natural circulation boiler - iNOOK

The INTEC natural circulation boiler iNOOK is a high-pressure steam generator for closed water-steam circuits.

It is directly connected to the heat consumer. The steam produced is a heat transfer medium and transfers the process heat to process engineering systems in which materials are processed or manufactured that have special safety requirements, for example in the food and beverage industry.

Print area	60 - 100 bar(ü)
Saturated steam	1 - 13 to/h
Performance range	0.5 - 5 MW

The complement to our natural circulation steam boiler iNOOK for closed systems in the medium performance range is the newly developed steam boiler for open systems with forced circulation in the high performance range - our iCUBE