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Integrated moist steam flow dryness measuring device and measuring method

A technology of measuring device and measuring method, applied in the direction of measuring device, instrument, etc.

Active Publication Date: 2013-12-11
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the measurement of wet steam flow and dryness is of great significance to engineering applications, there is no wet steam measuring instrument capable of real-time measurement, high accuracy, long life, reliable performance and good economy in current industrial applications.

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  • Integrated moist steam flow dryness measuring device and measuring method
  • Integrated moist steam flow dryness measuring device and measuring method
  • Integrated moist steam flow dryness measuring device and measuring method

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Embodiment Construction

[0046]The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0047] The invention discloses an integrated measuring device for wet steam flow and dryness. The connection between the two components. Double Venturi tubes with different diameter ratios are used in series to measure the dryness and flow rate of wet steam. The steam flow rate, pressure and dryness flowing through the double Venturi tubes are theoretically equal everywhere, so that two different Venturi tubes can be measured at one time. The pressure difference at the throat of the pipe is used to construct two different virtual height characteristic equations, which are convenient for joint solution to obtain the dryness and flow rate of wet steam.

[0048] Both the input venturi tube and the output venturi tube are connected with a differential pressure measuring device for measuring the pressure difference at their throats, and ...

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Abstract

An integrated moist steam flow dryness measuring device comprises a double-Venturi tube. The double-Venturi tube is composed of an input Venturi tube and an output Venturi tube which are connected in series, the diameter of a port of the input Venturi tube is equal to the diameter of a port of the output Venturi tube but the diameter ratio of the throat part of the input Venturi tube is not equal to the diameter ratio of the throat part of the output Venturi tube. The input Venturi tube and the output Venturi tube are connected with differential pressure measuring devices for measuring the differential pressure of the throat parts of the input Venturi tube and the output Venturi tube. The input Venturi tube is further connected with a pressure measuring device used for measuring the pressure of a pipeline of the input Venturi tube. Preferably, each differential pressure measuring device comprises a condenser and a pressure difference transmitter, wherein the condenser is connected with a throat pipeline of the corresponding Venturi tube, and the pressure difference transmitter is connected with a pipeline of the condenser. By means of the integrated moist steam flow dryness measuring device, the total flow and dryness of the moist can be calculated on line in real time due to the fact that the two Venturi tubes with different structures are connected in series.

Description

technical field [0001] The invention belongs to the technical field of thermal measurement, and relates to an integrated measuring device for wet steam flow and dryness and a method for measuring wet steam flow and dryness. Background technique [0002] Wet steam is a vapor-liquid two-phase mixture in which the vapor phase is a continuous phase, the liquid phase is a dispersed phase, and has a stable flow structure. The flow and dryness of wet steam are important parameters for thermal experimental research and equipment operation; for example, the flow and dryness of wet steam have a great influence on the operation safety of the heating reactor with low temperature and low dryness natural circulation; the steam turbine end of the nuclear power plant Several stages of blades, the steam dryness directly affects the blade life of the steam turbine and the efficiency of the steam turbine; in chemical, food processing, pharmaceutical and other industries, the control of steam f...

Claims

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Application Information

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IPC IPC(8): G01D21/02
Inventor 何灿阳袁德文闫晓熊万玉刘锦昝元峰黄军黄彦平
Owner NUCLEAR POWER INSTITUTE OF CHINA
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