Difference between revisions of "Steam Injectors"
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[[File:Steam injectors.jpg|thumb|200px|right|Steam injectors]] | |||
'''Steam injectors''' use steam to raise the temperature of water or other liquids. The injector draws in cold liquid, mixes it with steam inside the injector and distributes the heated liquid in the tank. In many applications the circulation induced by the injector is an advantage ensuring thorough mixing and avoiding temperature stratification. | |||
==Boiler feedtank applications== | |||
Dissolved oxygen must be removed from boiler feedwater if corrosion is to be prevented in the boiler. Oxygen can be removed either by chemicals or by heating. The dissolved oxygen content of water at 20°C is 9 ppm, at 60°C is 5 ppm and at 90°C is just under 2 ppm. By heating the boiler feedwater to typically 85 - 90°C to remove most of the oxygen, and introducing an oxygen scavenging chemical into the boiler feedline to remove the small quantity of remaining oxygen, chemical usage can be minimised. Additionally, boiler efficiency may be increased since blowdown requirements may be lowered. | |||
==Videos== | |||
<youtube>4oOIRSi8W3o</youtube> | |||
<youtube>CfbByGdUiEo</youtube> | |||
Latest revision as of 18:09, 28 August 2012
Steam injectors use steam to raise the temperature of water or other liquids. The injector draws in cold liquid, mixes it with steam inside the injector and distributes the heated liquid in the tank. In many applications the circulation induced by the injector is an advantage ensuring thorough mixing and avoiding temperature stratification.
Boiler feedtank applications
Dissolved oxygen must be removed from boiler feedwater if corrosion is to be prevented in the boiler. Oxygen can be removed either by chemicals or by heating. The dissolved oxygen content of water at 20°C is 9 ppm, at 60°C is 5 ppm and at 90°C is just under 2 ppm. By heating the boiler feedwater to typically 85 - 90°C to remove most of the oxygen, and introducing an oxygen scavenging chemical into the boiler feedline to remove the small quantity of remaining oxygen, chemical usage can be minimised. Additionally, boiler efficiency may be increased since blowdown requirements may be lowered.
Videos