Cracking furnace tube corrosion monitoring system based on distributed optical fiber sensing technology

Abstract

The invention discloses a cracking furnace tube corrosion monitoring system based on a distributed optical fiber sensing technology. The system comprises a detection unit, a display unit and alarm unit, a power supply unit and a broadband light source. The output terminal of the power supply unit is electrically connected with the input terminals of the detection unit, the display unit and alarm unit and the broadband light source. The output terminal of the broadband light source is electrically connected with the input terminal of the detection unit through a wire. The output terminal of thedetection unit is electrically connected with the input terminal of the display unit and alarm unit. The output terminal of the broadband light source is connected with the input terminal of a demodulator in the detection unit. According to the invention, pipelines with different pipe diameters are easy to customize; the requirements of pipeline monitoring rules are met from the aspects of lengthand flexibility; the normal operation of the pipelines is not influenced and the integrity of the pipelines is not damaged; the signal identification degree and the positioning precision are improvedbased on a specific sensibilization mechanism; and the influence of electromagnetic radiation is avoided and the noise sources are reduced. The system is convenient to popularize.

Description

technical field [0001] The invention belongs to the field of petrochemical equipment monitoring, and relates to a cracking furnace tube corrosion monitoring system based on distributed optical fiber sensing technology. Background technique [0002] The internal corrosion of the furnace tube of the cracking furnace is caused by the erosion of the inner wall by the internal conveying medium. The direct consequence is the reduction of the pipe wall thickness. The actual state of the cracking furnace in operation, the corrosion problem is found, the corrosion change rule is monitored, and the corrosion process is controlled by changing the production process conditions or operating the electrochemical protection system, so as to control the corrosion rate within the allowable range. Prevent equipment from operating in hazardous conditions or failing prematurely. [0003] According to the basic principles of material mechanics, the relationship between the hoop stress σ, the hoo...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a cracking furnace tube corrosion monitoring system based on distributed optical fiber sensing technology, to solve the problems of long-distance transmission signal attenuation and many noise sources in the pressure sensor detection method; position positioning accuracy is affected by signal nonlinearity. Influenced by the characteristics of the production, the problem of large error

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