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Boiler
Technique
The performance
range thus far:
Steam
rating up to 100 ton/hr
Steam
pressure up to 64 bar
Steam
temperature
up to 480 °C
Apart from the
above mentioned, IPT cater for larger capacities as
well as other boiler types (hot water and thermal oil for process) are
basically different by several characteristic
features.
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System Description
- IPT/ERK - Boiler is a natural circulation boiler
well proven in many plants under difficult conditions.
They distinguish themselves by a robust and clear
design best fitted for the demand of power stations or
industrial applications. IPT/ERK - Boiler is designed and
built for low maintenance and high
reliability.
-
The
pressurized body is made of a stable framework.
Downcomers, headers and tube walls are welded together to a
gas-tight tube cage.
-
The tube-cage, with its heating
surface and convection banks, stand on the ground. It
is self-supported by downcomers from all four corners
of the boiler (corner tubes). Other boiler types need
heavy supporting frames where they are hung in. Those
frames are not necessary in IPT-Boilers. Hence,
complicated connections between boiler and cold frame do not
exist.
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Water Circulation in
IPT/ERK-Boilers
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Usual Natural
Circulation Boiler
S = heated
riser tubes
Q =
heating
F =
downcomer
V =
header |
IPT/ERK-Boiler
U = overflow
tube
G = mixture
tube
R = unheated
return tube
Z =
header
S = heated
riser tube
Q =
heating
F = drum
downcomer
V = header
(distributor)
Z = header
(collector) |
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The riser tubers S are
heated.
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The density difference between
downcomers F (pure water) and riser tubes S (mixture of
water and steam) causes a flow upside to the drum.
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In the drum, water and steam are
separated. The water flows through the downcomers F to
the headers of the riser tubes.
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Also in IPT boilers riser tubes
S are heated.
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The water-steam mixture flows
upwards.
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In the upper header Z, steam
is partly separated from water. The water flows
through unheated return tubes R to the lower headers
V.
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The partly separated steam flows
through the overflow tube U to the steam space of the
drum. The remaining mixture runs through mixture tube
G.
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The final separation of water
and steam takes place in the drum. The lower headers
are fed by the downcomers F.
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Due to the return tubes R the
route of water is shortened and the water circulation is
improved.
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The heating surfaces can be
arranged at quite a long distance from the drum.
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