Method and apparatus for determining the content of a foreign gas in a process liquid
AssigneeAnton Paar GmbH
InventorJosef Bloder
Life of this patent
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Abstract
A method and an apparatus determine a content of a foreign gas in a process liquid in which a measurement gas, especially CO2, has been dissolved. A concentration of the measurement gas is ascertained and a concentration of the gas mixture formed by the measurement gas and the foreign gas is ascertained, especially via a manometric measurement method. The measurement values are supplied to an evaluation unit. A concentration of the foreign gas is determined on the basis of the ascertained concentration of the measurement gas and the ascertained concentration of the gas mixture.
Claims18
A method for determining a content of a foreign gas in a process liquid in which CO2 as a measurement gas has been dissolved, which comprises the steps of:
- using an optical sensor to ascertain a concentration of the CO2 measurement gas either:
- prior to adding the foreign gas to the process liquid, or
- in a gas mixture formed by the measurement gas and the foreign gas;
- using a manometric sensor to obtain an apparent CO2 measurement gas concentration by ascertaining a concentration of the gas mixture formed by the measurement gas and the foreign gas using a manometric measurement method;
- supplying measurement values to an evaluation unit;
- and
- determining a concentration of the foreign gas on a basis of the concentration of the CO2 measurement gas ascertained by the optical sensor and the apparent CO2 measurement gas concentration ascertained using the manometric sensor.
An apparatus for determining a content of a foreign gas in a process liquid in which CO2 as a measurement gas has been dissolved, the apparatus comprising:
- a pipe system in which the process liquid can flow and/or a vessel in which the process liquid is collectable;
- an optical sensor by which a content of the CO2 measurement gas is ascertained;
- a manometric sensor by which a total pressure and a temperature of the CO2 measurement gas and the foreign gas in the process liquid are ascertained using a manometric measurement method;
- an evaluation unit configured to determine the content of the foreign gas in the process liquid in which the CO2 measurement gas has been dissolved, said evaluation unit configured to:
- ascertain a concentration of the CO2 measurement gas using information from said optical sensor;
- ascertain an apparent CO2 measurement gas concentration of a gas mixture formed by the measurement gas and the foreign gas using information from said manometric sensor;
- receive measurement values;
- and
- determine a concentration of the foreign gas on a basis of the concentration of the CO2 measurement gas ascertained and the apparent CO2 measurement gas concentration ascertained.
Dependencies are inferred from the claim text.