Liquid-phase water content detection device and liquid-phase water content detection method for wet steam

Abstract

The invention relates to a liquid-phase water content detection device for wet steam. The liquid-phase water content detection device for the wet steam is arranged on a main wet steam pipeline and comprises a bypass pipeline, a first valve, a second valve, a test container and a heater, wherein the bypass pipeline is communicated with the main wet steam pipeline; the first valve and the second valve are arranged on the bypass pipeline; a set fixed quantity of air is filled in the test container; the heater is connected with the test container; the bypass pipeline between the first valve and the second valve forms a closed sampling space through a third valve; a pressure meter, a thermometer and a hygrometer are arranged on the test container; the test container is communicated with the closed sampling space through the third valve. The invention further provides a liquid-phase water content detection method for the wet steam. According to the liquid-phase water content detection device and the liquid-phase water content detection method, a state of tested gas can be measured on line, and only simple conventional accessory equipment is needed; the test process is simple and feasible; furthermore, calculation of heat is not needed; the heat dissipation loss cannot affect the measurement precision; the liquid-phase water content detection device and the liquid-phase water content detection method are suitable for the wet steam with various pressure levels.

Description

technical field

[0001] The invention relates to the technical field of wet steam physical property measurement, in particular to a liquid-phase water content detection device and detection method in wet steam. Background technique

[0002] There are many practical needs for measuring the liquid phase water content in wet steam, but there is no ideal solution so far. In principle, the existing measurement methods under development mainly include thermodynamic method, optical method, tracer and conduction method, separation method, critical velocity method and the use of orifice plate measurement. Among the commonly used thermodynamic methods, there are condensation methods, steam-air mixing methods, and heating methods.

[0003] In the condensation method, the extracted saturated steam is condensed into condensed water in the condenser, and the relative proportion of liquid phase water in the gas phase is calculated according to the amount of cooling water, which has the dis...

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