F - Mech Eng,Light,Heat,Weapons – 01 – K
Patent
F - Mech Eng,Light,Heat,Weapons
01
K
122/23
F01K 13/02 (2006.01) F01K 9/02 (2006.01)
Patent
CA 1082057
BOILER FEED WATER PUMP CONTROL SYSTEMS ABSTRACT OF THE DISCLOSURE The boiler feed water system is provided with a motor driven feed water pump and a steam turbine driven feed water pump. The control system comprises a digital computer including a flow quantity control system res- ponsive to the degree of opening of a flow control valve and the discharge quantity of the motor driven feed water pump for controlling the flow quantity thereof, and a speed control system responsive to the speed and dis- charge flow quantity of the steam turbine driven feed water pump, head pressure of the feed water system and the operation of a control motor for a steam control valve of a pump driving turbine. The control is switched between the flow quantity control system and the speed control system in accordance the load of the plant. With this control system it is possible to reason- ably and reliably control the feed water pumps during startng, stopping and normal operating conditions of the power plant and to raduce the starting and stopping time of the plant.
296392
Fujii Katsumasa
Takeda Naoshi
Fetherstonhaugh & Co.
Tokyo Shibaura Denki Kabushiki Kaisha
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