Method and device for measuring and keeping constant the water content in a salt bath
AssigneeSKF Industrial Trading and Development Company, B.V.
InventorJohannes Maria van de Kooi
Life of this patent
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Abstract
A method and apparatus for measuring and keeping constant the water content in a highly heated salt bath, by measuring the change in dew point of a gas flowed over the salt bath.
Claims14
A method for measuring and keeping substantially constant the proportion of water in a salt bath, where the water vapor pressure over the bath corresponds to the proportion of water in the bath, comprising the steps:
- flowing a gas having a predetermined initial dew point toward and onto the surface of said salt bath, absorbing a quantity of water vapor from said salt bath with said gas and thereby changing the value of said dew point, measuring said change in value of the dew point, and supplying a selected quantity of water to said salt bath for returning the dew point of said bath back to the initial value thereof and thereby maintaining the water proportion of said bath.
A device for measuring and maintaining substantially constant the proportion of water in a salt bath in a tank, where the water vapor pressure over the salt bath corresponds to the proportion of water in the bath, comprising:
- container means for enclosing a space above a portion of the top surface of said salt bath, whereby said surface is designated inner top surface within said container means and outer top surface external of said container means, gas admission means for directing gas with an initial dew point of predetermined value into said space toward and onto said inner top surface with water vapor from said salt bath being absorbed by said gas and the dew point thereof being changed proportionately, gas exhaust means for removing said gas and absorbed water vapor from said space, measuring means for measuring the change in value of the dew point of said removed gas, and control means for adding a quantity of water or steam to said salt bath sufficient to return the dew point thereof to said initial value.
Dependencies are inferred from the claim text.