Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting microcrack of high temperature furnace inner wall of furnace and device therefor

A micro-crack, high-temperature furnace technology, applied in measuring devices, using sonic/ultrasonic/infrasonic waves to analyze solids, instruments, etc., can solve the problem of inability to effectively detect micro-cracks on the inner wall of high-temperature furnace tubes, and achieve convenient measurement, accurate measurement results, The effect of simple device structure

Inactive Publication Date: 2007-08-15
SHANDONG ELECTRIC POWER RES INST
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the micro-cracks on the inner wall of the high-temperature furnace tube cannot be effectively detected at present, and provide a method and device for detecting micro-cracks on the inner wall of the high-temperature furnace tube of the boiler. It can not only effectively detect the micro-cracks, but also has a structure Simple, easy to use and other advantages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for detecting microcrack of high temperature furnace inner wall of furnace and device therefor
  • Method for detecting microcrack of high temperature furnace inner wall of furnace and device therefor
  • Method for detecting microcrack of high temperature furnace inner wall of furnace and device therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0040] A power plant has a 130t / h boiler. During the four years of operation, the high-temperature superheater tube is 12CrlMoV, with a specification of φ42×3.5. The tube burst occurred four times. In order to analyze the cause of the tube burst, the device of the present invention was used to measure its Oxidation corrosion and cracks on the inner wall of the high temperature superheater tube. There are 60 rows of this superheater, and a total of 200 points were detected. Two suspicious waveforms were detected in the area where the tube burst in the past, while the waveforms of other tubes were basically the same. The waveforms are exemplified below. Figure 5 is the waveform without oxidation cracks, and Figure 6 is the waveform with oxidation microcracks.

[0041] Through this inspection, two pieces of foreign matter were found in the header box higher than the entrance with the OLYMPUS video endoscope (the size of the foreign matter is 40mm×60mm, while the height of the tub...

Embodiment example 2

[0043] The material of the water wall of a thermal power plant is 20g steel, the specification is φ65×5. Leakage occurs during operation for 80,000 hours. The explosion is located in the water wall tube facing the fire surface in the form of a window and cracks longitudinally along the tube with a maximum longitudinal opening of 52.36 as shown in the figure below. mm, the maximum lateral opening is 45.52mm. There is no obvious plastic deformation in the pipe section near the burst, and the edge of the burst is rough, showing a brittle fracture morphology. Through metallographic analysis and macroscopic analysis, it was confirmed that the tube explosion was caused by hydrogen embrittlement. Because the occurrence of hydrogen embrittlement has the characteristics of large area and abruptness, conventional inspection is relatively difficult, but the invention can quickly inspect the conditions of other pipes.

[0044]In order to check the conditions of other pipes, a large-scale...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention discloses one method and device to test furnace high temperature inner wall crack, which comprises the following steps: a, firstly selecting multiple test points in tube outer wall for purification process; b, collecting tube inner wall micro crack point by point; c, sending the collected wave shape into display device and to process device; d, data process device uses software to compute out tube inner wall crack thickness.

Description

technical field [0001] The invention relates to a non-destructive testing technology for pipes, in particular to a method and device for detecting microcracks on the inner wall of a high-temperature furnace tube of a boiler, so as to detect the microcracks generated on the inner wall of the high-temperature furnace tube in the high-temperature furnace of the boiler during operation. 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, high-temperature furnace tubes mainly refer to superheater tubes and reheater tubes. According to statistics, in the boiler accide...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N29/07G01B17/02
Inventor 张都清张广成王德洲
Owner SHANDONG ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com