Electric power plant condenser ball cleaning on-line monitoring device based on optical fiber sensing technology

Abstract

The invention relates to an on-line monitoring device for rubber ball cleaning of a condenser of a power plant based on optical fiber sensing technology. The device comprises a rubber ball cleaning device and a monitoring control circuit. The technical key points of the device comprise: an information acquisition unit of the monitoring control circuit adopts a contrast type optical fiber photoelectric sensor, a transmitting end and a receiving end of the contrast type optical fiber photoelectric sensor are packaged on the relative positions at both sides of a shell of the monitoring device respectively, planes where axes of the transmitting end and the receiving end are positioned are perpendicular to a water flow direction in the shell, the contrast type optical fiber photoelectric sensor is connected with a computer data analysis and processing unit of the monitoring control circuit through a switching value input board, and an output end of the computer data analysis and processing unit consisting of a data acquisition and storage module and a statistic data analysis module is connected with an alarm display unit. The device is used as an additional component of the rubber ball cleaning device. Compared with the prior similar devices, the device has a simple structure and low cost, and can monitor the quantity of rubber balls recovered in a circulating pipeline in a real-time, on-line and accurate mode.

Description

technical field [0001] The invention relates to an automatic monitoring device based on optical fiber sensing technology, in particular to an optical fiber-based sensor used as an independent additional component for real-time on-line detection of the number of recovered rubber balls in the circulation pipeline of a rubber ball cleaning device for a power plant condenser. Power plant condenser rubber ball cleaning online monitoring device based on sensor technology. Background technique [0002] As we all know, during the power generation process, the power plant mainly uses the rubber ball cleaning device to clean the condenser to prevent the dirt on the cooling tube wall of the condenser from affecting the heat exchange efficiency of the condenser, resulting in a decrease in the vacuum degree of the unit and increasing the coal consumption of power generation. If fouling occurs on the pipe wall, it will seriously affect the normal operation of the cleaning device. The exi...

AI Technical Summary

Problems solved by technology

Even so, because the products of these two companies are sold as a complete set in our country, and they do not sell components such as automatic rubber ball recovery monitors or flapping rubber ball filters, not only the purchase price of the entire cleaning system is quite expensive, but also the power plant Also had to replace the original rubber ball cleaning system that had not completely failed, resulting in a huge waste of resources

[0006] The inventor once aimed at problems such as checking the number of recycled rubber balls and detecting rubber ball wear in the prior art, and replacing a complete set of cleaning equipment will cause resource waste, etc., and designed the "Automatic Monitoring of Power Plant Condenser Rubber Ball Cleaning" with the announcement number CN101216270A "Device", which can be used as an additional device of the original rubber ball cleaning system. Under the premise of ensuring the brightness of the environment, the continuous images of rubber balls collected by the camera are sent to the image processing unit for processing and analysis, and finally the number of recycled rubber balls is obtained. and display the test results

Since the flow speed of the cleaning rubber ball is about 3 m / s, an industrial camera with a high frame rate must be used to obtain a clear picture, and this kind of camera is relatively expensive, resulting in an increase in manufacturing costs

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