Direct Hot Air Generators

Used for heat transfer for industrial purpses.

Direct type generators with combustion flue gas and process air mixing, equipped with thermal units fed with gaseous and/or liquid fuels. They can also be supplied with electric or hybrid thermal units.
Main industries of use: ceramic, bricks, minerals, detergents etc.

They can be of two categories depending on the type of burner. When the burner is of the air vein type we realize the full-crossing generator, that is, the burner body is invested over the entire section by the process air. The construction can provide for internal or alternatively external cladding.

When the burner is of the traditional type we construct a generator that provides a concentric external structure with the combustion chamber. Generally the construction requires internal coating in refractory material where the burner flame can develop.
Between the external structure of the generator and the interior combustion chamber we have a space for the passage of process air. The process air also has the function of “cooling” the combustion chamber both internally and externally.

At the generator end, combustion flue gas and process air mix together.
These can be designed either in horizontal or vertical axis.

Indirect Hot Air Generators

Indirect type generators with separation of flue gas and process air, equipped with thermal units fed with gaseous and/or liquid fuels.
Main industries used: Food and cereal drying.

Technical features

  • Combustion chamber, where the burner flame develops and inverses.

  • Concentric shell tube in which the combustion fumes flow internally. The tubes are connected on the opposite side to a circular collector from which combustion fumes are discharged.

  • The collector has the function of “collecting” all the fumes coming from the tubes, before being expelled from the chimney.

  • The external structure of the heat generator, cylindrical and coaxial with the combustion chamber and shell tube, has the purpose of containing the process air that is heated by crossing both the interior combustion chamber and the entire shell tube.

  • Externally the generators are insulated with mineral fibre and sheet coating. Usually the total thickness of the coating is 100 mm.

Also of interest

Complimentary products

Post Combustion

Treat air polluted with solvents or volatile organic substances

Heat Recovery Systems

Heat recovery systems from hot flue gas and flue gas/air exchangers