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High temperature furnace pipe residue lifetime estimation method and device

A technology for life assessment and high-temperature furnaces, applied to measuring devices, instruments, and the use of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as the inability to calculate the remaining life of the tube, the difficulty in supervising the operation of the high-temperature furnace tube, and the inability to effectively evaluate the operating status of the tube, etc. , to achieve the effect of avoiding boiler accidents

Inactive Publication Date: 2007-08-08
JINAN FENGCAI ELECTRONICS TECH
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Problems solved by technology

[0003] At present, the detection methods for the above-mentioned high-temperature furnace tubes are mainly limited to thickness measurement and creep measurement, which cannot effectively evaluate the previous operating conditions of the tubes, and cannot calculate the remaining life of the tubes, which brings great difficulties to the supervision and operation of high-temperature furnace tubes. big difficulty

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  • High temperature furnace pipe residue lifetime estimation method and device
  • High temperature furnace pipe residue lifetime estimation method and device
  • High temperature furnace pipe residue lifetime estimation method and device

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Embodiment

[0025] As shown in Fig. 1, the high-temperature furnace tube residual life evaluation device of the present invention includes: a high-frequency ultrasonic probe 4, a digital ultrasonic flaw detector 5 and a data processing system 6, which are sequentially connected together through communication cables. The high-frequency ultrasonic probe 4 is used to collect the waveform of the inner wall oxide layer 2 and the pure metal layer 7 of the high temperature furnace tube 1. When collecting the waveform of the pure metal layer 7, the outer wall oxide layer 3 should be removed, and the probe is in contact with the pure metal layer 7. The frequency of the high-frequency ultrasonic probe 4 is divided into several types such as a longitudinal wave probe of 15MHz, a longitudinal wave probe of 30MHZ and a transverse wave probe of 20MHz, and a general-purpose digital ultrasonic high-frequency probe can be used. The digital ultrasonic flaw detector 5 is used to receive the collected wavefor...

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Abstract

The invention provides a high-temperature furnace tube remaining life assessment method, including the following steps: (a) according to the propagation velocity of the ultrasound in the oxygen skin, to calculate thickness of the inner wall oxygen skin; (2) according to the propagation velocity of the ultrasonic in the high temperature furnace tube matrix, to calculate the metal layer thickness; (3) establish the relationship database of the high temperature metal inner wall oxygen skin thickness, the running time and the equivalent temperature, to calculate the equivalent temperature when high temperature furnace tube running; (4) calculate the high-temperature furnace tube operation stress, and establish the relationship database of the high temperature furnace tube equivalent temperature, remaining life, and operation stress, and forecast the high temperature furnace tube remaining life. At the same time, it provides a high-temperature furnace tube remaining life assessment device, and the device includes the waveform acquisition device, the waveform display and receiving device, and the data-processing system. The invention can calculate and predict the high temperature furnace tube remaining life, and according to the remaining life, it can replace in advance the high-temperature furnace tube during the life end state.

Description

technical field [0001] The invention relates to a method and device for evaluating and predicting the remaining life of a high-temperature furnace tube in a high-temperature furnace of a boiler, and belongs to the technical field of remaining life evaluation. Background technique [0002] For thermal power plant boilers, the heating surface is a heat transfer component, which is composed of evaporation heating surface, superheating heating surface, water and air preheating heating surface, mainly including economizer, superheater, water wall, reheater and air Preheater. They are all composed of serpentine alloy steel, stainless steel or carbon steel pipes, and the first four pipes are also called "four pipes". Among them, the high-temperature furnace tube mainly refers to the superheater tube and the reheater tube. According to statistics, in my country's 200MW and above large unit boiler accidents, 71.7% are caused by boiler tube bursting, and accidents caused by high-tem...

Claims

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Application Information

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IPC IPC(8): G01M19/00G01B17/02G01M99/00
Inventor 秦应峰高峰孟宏李燕
Owner JINAN FENGCAI ELECTRONICS TECH
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