Air-cooled island fin tube bundle temperature measuring device based on acoustic technology and air-cooled island fin tube bundle temperature measuring method based on acoustic technology

Abstract

The invention provides an air-cooled island fin tube bundle temperature measuring device based on an acoustic technology and an air-cooled island fin tube bundle temperature measuring method based onthe acoustic technology. The air-cooled island fin tube bundle temperature measuring device comprises a hollow pipeline, acoustic conduits, acoustic generators, acoustic sensors, a signal conditioner,a power amplifier, a junction box, input / output equipment and an industrial personal computer. The surface of the hollow pipeline is provided with small holes. The medium in the hollow pipeline maintains the temperature balanced with that around the fin tube bundle through the airflow through the small holes. The acoustic generators are installed on the hollow pipeline through the acoustic conduits. The acoustic sensors are arranged in turn for a certain distance along the hollow pipeline according to the accuracy requirement so as to form multi-segments acoustic paths. The acoustic generators successively generate acoustic waves of the fixed frequency. The acoustic signals are transmitted to the industrial personal computer through the sensors, the signal conditioner, the junction box and the input / output equipment. The industrial personal computer computes and analyzes the received signals so as to obtain the measurement result.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and in particular relates to an acoustic technology-based device and method for measuring the temperature field of an air-cooled island finned tube bundle. Background technique [0002] Air cooling refers to a cooling method that uses air to cool the exhaust steam of steam turbines in power stations. In order to adapt to the shortage of water resources in some areas of our country, air-cooling units in thermal power generation have been developed rapidly. However, during its operation, especially in the low temperature environment in winter, due to the small flow of condensing steam or the uneven flow of cooling air, it is easy to cause the problem of partial freezing of the finned tube bundles, which affects the normal operation of the condensing equipment, and then Reduce the power generation efficiency and economic benefits of the unit. [0003] In the prior art, the air-cool...

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Problems solved by technology

However, during its operation, especially in the low temperature environment in winter, due to the small flow of condensing steam or the uneven flow of cooling air, it is easy to cause the problem of partial freezing of the finned tube bundles, which affects the normal operation of the condensing equipment, and then Reduce the power generation efficiency and economic benefits of the unit

[0003] In the prior art, the air-cooled island is generally monitored by measuring the condensate temperature in the condensate header and the vacuum temperature, or the temperature measurement cables are arranged on the inner and outer sides of the finned tube bundle according to certain rules, and according to the measurement point The monitoring of the air-cooling island is completed for temperature changes, but these methods cannot completely reflect the temperature field in the finned tube bundle, nor can they effectively prevent the problem of local freezing of the finned tube bundle

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