A、precipitate silica from solution
B、reduce corrosion in the heating coil
C、prevent clogging and erosion in the coil
D、maintain zero water hardness
更多“The boiler water alkalinity in a coil-type auxiliary boiler should be maintained at the pH recommended by the boiler manufacturer to（）”相关的问题
A、natural circulation of the water in the water tube boiler is better than that in the fire tube boiler B、for the same output the water tube boiler will carry less mass of water compared with the fire tube boiler C、the water tube boiler will cost shorter time for steam raising D、the water tube boiler require lower skill in operating and maintaining
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、remove suspended and precipitated solids from the boiler water B、completely drain the boiler in an emergency situation C、prevent hardened scale deposits in the water drum D、remove floating impurities from the oily water surface
A、A.operating the boiler at less than normal water level B、B.installing fins on the firesides of water-tubes C、C.increasing the amount of excess air to the burners D、D.treating the boiler water with chemical oxygen scavengers
A、completely drain the boiler in an emergency B、prevent sludge from forming in the drum C、remove floating impurities from the boiler water surface D、remove settled solids from the water drum
A、bottom blow the boiler B、treat the water with caustic soda C、treat the water with chemical scavengers D、reduce the water alkalinity to recommended readings
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、water-tube natural circulation boilers B、fire-tube boilers C、water-tube forced circulation boilers D、all of the above
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
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