Tender Document for Construction of Ghorasal 300-450 MW ... - BPDB

Evaporator and Super-heater of the steam generator.
b. The support structure for the steam generator and ducting.
c. The stairs, platforms and ladders required for maintenance, inspection and operation
of the heat recovery steam generator.
d. The heat recovery steam generator circulating water system for the HP and LP
drums.
e. The steam generator valves and devices which consist of indications, switches,
transmitters and sampling nozzles. Motorised valves as required for remote or
automatic operation.
f. The feed-water control valve system.
g. Flow nozzles for water and steam.
h. Deaeration system complete in all respect
i. Feed water & preservation Tanks
j. The steam generator control system to provide control capability for transient,
steady state and protective conditions.
k. Insulation and lagging.
l. Foundation plates and bolts.
m. Any other equipment/ material/ system required for HRSG complete in all respect.
Note: Supplementary firing for HRSG shall not be considered
2.6 Steam Turbine Generating Unit
2.6.1 One (1) unit of steam turbine of mixed flow and condensing unit, and it
shall be equipped with the following accessories.
a. Inlet stop valve (s) with coarse and fine mesh steam strainer.
b. Control valves with necessary bypass system.
c. High pressure steam bypass valve with actuator and position feedback device.
d. Motorised drain valve for turbine casing, Gland steam, seal system and
above/below stop valve seats.
e. Automatic gland steam seal system.
f. Shaft packing vent system with blower and gland condenser.
g. Turbine exhaust hood water spray system and motorised vacuum breaker
valve.
Ghorasal 300-450 MW CCPP Project (Vol-2A of 2) 12