Gener
al inf
ormation
9
The flame blowing generator is composed by cylindrical hearth
with wet end in which the flame develops and where the reversal
of the combustion products occurs.
The fumes, therefore, enter the tube bundle at the front tube
plate and are conveyed towards the rear smoke chamber from
which they escape through the chimney fitting.
The appliance is dimensioned to ensure low thermal loads in
the combustion chamber and a low surface loading.
Construction features
Boiler body
The boiler body is made up of a cylindrical shell, hearth, hearth
bottom and flat steel piping plates, sized according to the VSG
calculation code (Generators Stability Verification) (and CTI rec
-
ommendations) and in compliance with the technical standards
in force.
The materials used are accompanied by manufacturing certif-
icates attesting the chemical and mechanical features and in-
spections during the production cycle and therefore their suit-
ability to use.
The welded joints are performed at electric arc according to ap-
proved procedures by properly qualified personnel and subject
-
ed, according to an internal level of "Manufacture and Control",
to Non Destructive Testing.
The smoke pipes that make up the tube bundle, are welded to
the piping plates by means of qualified automatic procedures.
When production is finished, any pressurised body is tested by
carrying out the hydraulic test in compliance with laws / stand-
ards in force.
Front door
The front door is made of welded steel sheet, coated internally
with a layer of insulating material (towards the outside) and a
layer of refractory material (towards the inside). It is mounted on
hinges that allow opening reversibility and complete adjustment.
It is equipped with self-cleaning flame-warning light, suitably
positioned to control the correctness of combustion in opera-
2.3 - GENERAL FEATURES
tion; on the same is bolted the burner coupling plate, supplied
blind, can be prepared for the type of burner indicated by the
customer.
Rear smoke chamber
The smoke chamber, made of welded steel sheet and insulated
with rock wool, is fixed to the rear tube plate by bolts to allow its
removal. It is equipped with suitable cleaning door and smoke
connection with horizontal axis of suitable diameter to the power
of the generator.
Base and walking surface covering
The base is constituted by a frame made of steel profiles elec
-
tro-welded to the tube plates and closed by means of welded
steel plate.
The service walkway located at the top of the generator is also
composed of a steel profile frame, covered with chequered
sheet metal (walking surface covering) and, when required,
completed with a parapet with handrail.
Insulation of the planking and gables
The thermal insulation of the planking is obtained with rock wool
mattress, linked with thermosetting resins, suitably supported
and coated on the outside by the pre-painted aluminium case.
The device gables (steam rooms) are also insulated with rock
wool, externally encased. Particular attention has been paid to
the drastic reduction of thermal bridges, through the interposi-
tion of felts and insulating gaskets in order to prevent body con-
tact with the coating, so as to reduce the surface temperatures
and limit dispersions to the benefit of both safety and yield.
