It is forbidden to use scraps from rubber, plastic materials etc as they produce
pollution and deteriorate the boiler.
There won’t be used wood scraps that were chemically treated.
It can be used higher caloric power fuels than wood, eg. Coal (anthracite, brown
coal, pit coal) or coke but Thermostahl Company must be announced before about
this, because there must be made some adjustments to the combustion chamber.
Burning coal with low caloric power (brown coal, lignite, peat) results in decreasing of
the thermal power of the boiler.
In the MCL boilers it is not recommended to burn powder coal or coal under the
granulation of 20 mm.
3.4 CONSTRUCŢON
3.4.1 The boiler body
The MULTIPLEX boiler is horizontal, with smoke pipes.
The main body of the boiler is made of killed steel plates St 37.2 STAS 500/2-
80~S235 JR SR EN 10025/90 hot rolled, conform DIN 17100. The cutting is made with a
high technology LASER machine. The THERMOSTAHL boiler is designed in such a way
that all its parts in touch with flames to be cooled by water. The profile, number and
length of the smoke pipes are designed specially for a maximal exploitation of the
exhausts.
The welding are made conform the standards 288-
1 şi 288-3 şi DIN 50120, 50121-
50145, SR EN 1011.1/2001, by using electric welding machines (MIG-MAG), for realizing
a penetration of the steel plate on all its thickness. The welding quality is checked in
conformity with DIN 8563. The welding process is conform 131-ISO 4063.
The smoke box is screwed and has a special door for cleaning, isolated with
asbestos plate, who also works as a safety door (preventing explosion). The smoke box
pipe is wide enough to ensure the smoke evacuation resulted after the burning process. If
the drought is very strong, the evacuation speed of the smoke can be slowed down by
adjusting a butterfly dumper who is fitted above the pipe of the chimney. The water circuit
is opposed the exhausts.
Every boiler is separately tested at a hydraulic pressure of 4-5 bar (according to the
type) for checking the resistance and waterproofing. A strong insulation covers all the
water tank.
