Roxul Industrial Insulation Process - Manual (Page 77)

1.6 Insulation of boilers
1.6.2 Supercritical steam generators
Insulation of dead spaces
Dead spaces located in front of the boiler wall or
roof containing installation components, are
enclosed with cladding, to which the insulation is
then mounted. Use a non-scaling sheet with a
minimum thickness of one mm. Fasten the sheets
to appropriate, structurally measured
substructures so that the thermal expansions can
be accommodated. The insulation is secured to
the dead space sheeting with pins as described
above.
An example of dead space insulation follows.
Support construction and spacer
There are various options available to attach
support constructions and spacers to boilers.
They can be mounted directly onto the boiler, to
auxiliary constructions, to buckstays (girders),
cross bars or handles. When selecting the support
construction and spacer and the corresponding
attachment option, a design matching must take
place between the insulator and the plant
manufacturer. With power plant components with
temperatures above 660 °F (350 °C), use high
temperature or fireproof steel.
Cladding
With power plant components with large surface
areas, such as utility steam generators, profiled
sheets are used as cladding material for
structural, economic and design reasons. The
open spans, overlaps and connections correspond
to the profile. Refer to the instructions of the
relevant profiled sheet manufacturer.
When selecting a suitable cladding material,
consider the following parameters: corrosion,
temperature resistance, type of construction and
architectural design. The contractor and customer
should consult about this matter.
Galvanized steel sheeting is generally used for the
insulation of utility steam generators, which are
usually located inside buildings.
1. Boiler wall - 2. ProRox ® insulation - 3. Fill up with
loose fill stone wool (mineral wool) - 4. Support
construction - 5. Dead space sheeting - 6. Aluminum
foil if required - 7. Metal cladding/Preformed sheets -
8. Support construction and spacer
Dead space for boiler wall collector
a
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