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An acoustic-based online measurement system and method for steam turbine exhaust humidity

A technology of exhaust steam humidity and steam turbine, which is used in measuring devices, scientific instruments, material analysis using sonic/ultrasonic/infrasonic waves, etc. Easy-to-use effects

Inactive Publication Date: 2016-08-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The optical window is exposed to the measurement airflow for a long time, and the surface is easily polluted and difficult to clean, which largely limits its practical application

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  • An acoustic-based online measurement system and method for steam turbine exhaust humidity
  • An acoustic-based online measurement system and method for steam turbine exhaust humidity
  • An acoustic-based online measurement system and method for steam turbine exhaust humidity

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the embodiments and drawings.

[0036] The present invention proposes an acoustic-based on-line measurement system for steam turbine exhaust steam humidity (hereinafter referred to as the acoustic measurement system), such as figure 1 As shown, the industrial computer is connected to the display, and is connected to the acoustic probe installed at the exit of the final stage of the steam turbine through hardware equipment.

[0037] Such as figure 2 As shown, the industrial computer 1 and the display 11 in the acoustic measurement system are stored in a centralized control room and can be integrated into the power plant control system. The sound card 2 can be integrated into the industrial computer 1. The power amplifier 4, junction box 3, signal conditioner 9, and data acquisition card 10 are all stored outside. The acoustic probe integrated by the electric sound source 5, the sound wave sensor 6, th...

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Abstract

The invention belongs to the technical field of on-line monitoring of steam turbine exhaust humidity, and in particular relates to an acoustic-based online measurement system and method of steam turbine exhaust humidity. The system includes an industrial computer, a sound card, a junction box, a power amplifier, an electric sound source, a sound wave sensor, a temperature sensor, a pressure sensor, a signal conditioner, a data acquisition card, and a display. The invention uses the principle that the sound velocity changes with the steam humidity, and calculates the steam humidity by measuring the sound velocity of the wet steam, and the corresponding parameters such as the temperature and pressure of the wet steam, so as to meet the needs of online measurement of the exhaust steam humidity of the final stage of the steam turbine; and The electric sound source, acoustic wave sensor, temperature sensor, and pressure sensor are highly integrated into an acoustic probe and arranged at the outlet of the final stage of the steam turbine. Real-time measurement and recording of steam humidity, especially suitable for the measurement of exhaust steam humidity in the last stage of steam turbine.

Description

Technical field [0001] The invention belongs to the technical field of on-line monitoring of steam turbine exhaust steam humidity, and in particular relates to an acoustic-based on-line measurement system and method of steam turbine exhaust steam humidity. Background technique [0002] Steam humidity has an important impact on the safety and economy of steam turbines, and steam humidity changes with changes in load. Therefore, the online measurement of steam turbine exhaust steam humidity is of great significance. At present, there are thermodynamic methods and optical methods that can be used to measure the humidity of steam turbine exhaust. [0003] The basic principle of the thermodynamic method is to take a sample from the exhaust steam of a steam turbine, and make it change from a two-phase flow to a one-way flow after treatment. According to the conservation of energy and conservation of mass, the humidity of the sample is obtained by inverse calculation. The accuracy of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/024G01N29/24
Inventor 张世平沈国清安连锁刘伟龙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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