A、ensure feed water flow into the boiler
B、keep the steam drum pressure high
C、prevent water hammer in the feed line
D、help the feed water flash to steam
更多“The boiler feed pump discharge pressure is higher than the steam drum pressure to （）.”相关的问题
A、high steam pressure in the boiler B、abnormally high feed water temperature C、abnormally high boiler water temperature D、steam demand exceeding feed pump capacity
A、feed pump suction line B、hot well C、shell of the feed heater D、feed lines to the boiler
A、boiler water level is low B、feedwater is too hot C、boiler steam demand is low D、feedwater is too cold
A、concentrations of calcium sulfate in the boiler water B、fuel oil in the feed water C、improper treatment of the feed water with calcium sulfate D、excessive feed water alkalinity
A、A.Increased suction head pressure B、B.Decreased feedwater temperature C、C.Pump recirculating line being open too much D、D.Excessive feedwater temperature
A、A.rise when the steam pressure is increased B、B.remain constant as long as the feed pump operates C、C.fall when the steam pressure is decreased D、D.vary as the steam demand changes
A、A.relight the boiler immediately to prevent loss of steam pressure B、B.relight the fire off the brickwork as the bricks are cherry red C、C.purge the furnace of any combustible gases before attempting to relight the fire D、D.speed up the feed pump to prevent dry firing when the burner flame is reestablished
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