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The first power generating unit was synchronized on
08.06.82
the last eighth unit was synchronized on
09.07.84.
All 8
units
had successfully operated for nearly
90000 hours
since initial commissioning each generating more than
15500000
MWH
without
any major constraints. The first distiller started
production in
july'83 and commissioning
of all 16 distillers were completed by
January'85.
The condition &performance in all
8
power generating units and 16 distillation units are
considered excellent even after
16-17 years
of operation without any
capacity reduction. The turbo-generators also supplied
by M/s. MHI/MELOC
(Mitsubishi Electric Corporation)
of Japan are of double star, Hydrogen
cooled type capable of generating 300 MW with a
terminal voltage of
21 V.
the generated power is pumped into the national grid
net-work through
6
over head line feeders after stepping up to a voltage of
275 KV
which is another novelty for
Kuwait. 300 KV
system of our station is connected with the
145 KV
system at our end through
3
No. of coupling transformers of
(250 MVA each).
This 145
KV
system is connected the with grid through
3
Nos. of
cable feeders to DEPS.
The
boilers supplied by M/s Deutsche Babcock of West Germany
are
of open-air installations capable of generating
1.100 T/Hr.
of steam at
140 bar & 540 C.
These single drum natural circulation, pressurized
furnace and RH
type boilers could be fired with natural gas, gas oil,
crude oil or heavy fuel with mixed firing option. The
steam turbines are supplied M/s Mitsubishi Heavy
Industries of Japan is a tandem compound, condensing
type turbine working on Reheat/Regenerative cycle.
Operation of the two segments of
power generation and water distillation are interlinked
in such a way that one boiler would supply the required
steam of one Turbo-Generator and two distillation units
at a time. Make-up water requirements of the Boilers
would be catered by the station Distillation Plant
itself using a De-mineralization Plant of
600
T/Hr.
capacity.
Fuel gas for DWPS is supplied by M/s K.O.C.
through 30 diameter underground pipeline from their high
pressure system of natural gas at
a
pressure of
20 bar.
Fuel
oil for DWPS is also supplied by M/s KNPC/KPC through
underground pipelines
(16m diameter) from Mina Al Ahmedi
refinery.
At our end, the oil is stored in seven tanks,
two for gas oil, three for heavy
fuel oil and two for
crude oil.
Another special feature of the
unit is that there would be no wastage of steam during start-up conditions and
trip-out conditions
even from full load. This is
achieved by the provision of two by-pass stations
(HP Bypass & LP Bypass).
The
boiler can be operated exclusively to supply process
steam
to distillers through HP/DP reducing stations
without turbine in operation.
The
condenser is sea-water cooled for the recovery of
exhausted steam. Sea water requirements of both the
power plant and the distillation plant are met with by
the sea water pumping. At
the sea water intake, the sea water is properly screened
before pumping and dosed with Hypo-chlorite solution.
This process, combined with cathodic protection
arrangements, ensures the condensers and heat exchanges
with the necessary cooling sea water free from any
living organism.
In
the Multistage flash evaporators connected with thermal
Power Station, the distillate production is very pure
which contains practically no carbonate hardness,
essential minerals etc. Such distillate, being almost
unstable could be aggressive and may lead to corrosion
of iron
pipes
and equipment used in the distribution system
(Red water problem).
The recarbonation system is
intended to increase the carbonate hardness in the
potable water
( remineralisation of distillate)
thereby
minimizing corrosion in the water distribution system
as well as to eliminate the health hazards of drinking
pure distillate without adequate minerals and salts.
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