Crown Boiler MWC Series Specifications Page 86

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Standard Technical Features of BTG System for Supercritical 660/800 MW Thermal Units
75
iv) Pump
design/
construction
code
HIS, ASTM, ASME or equivalent
v) No. of
pumps
One working
for each SG
plus one
common
standby
2(1W*+1S) 2(1W+1S)
for each
drain oil
tank
2(1W+1S)
for each
sump
vi) No. of oil
heaters
One working
for each SG
plus one
common
standby
- - -
vii) Capacity of
each pump
To cater to
30% BMCR
requirement
of one steam
generator
without coal
firing plus
10%
To cater to
7.5% BMCR
requirement
of one steam
generator
without coal
firing plus
10%
4 m
3
/hr
10 m
3
/hr
viii)
Pump
suction
head
considering
zero tank
level
considering
zero tank
level
considering
zero tank
level
-
ix) Pump
discharge
head
To suit the
requirements
of burners.
To suit the
requirements
of burners.
25 mlc
(minimum)
or as
required
to pump oil
from drain to
main oil
storage tank
@ 4m³/hr,
whichever is
higher.
50 mlc
(minimum)
or
suiting site
requirements
whichever is
higher.
* One additional working pump for more than two units
9.2.3 The fuel oil pressuring pumps, LDO pressuring pumps and drain oil pumps
shall be rotary, positive displacement, horizontal type fitted with relief valves.
9.2.4 Heavy fuel oil heaters shall be:
i) Shell and tube type with oil through tubes (oil through shell is also
acceptable).
ii) Capacity of each heater shall be suitable for the rated capacity of each
heavy fuel oil pressurizing pump.
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