Laser ultrasonic furnace tube coke monitor. Quarterly technical progress report No. 2 for reporting period August 1, 1998--November 1, 1998

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This report summarizes the technical progress achieved during the first quarter of the ERIP project entitled, ``Laser Ultrasonic Furnace Tube Coke Monitor.`` The focus of work during this reporting period was the testing of a novel device for introducing a broad bandwidth ultrasonic pulse at the surface of a simulated furnace tube. The device employs a sacrificial stand-off composed of a fusible alloy that conforms to hot furnace tube surface upon contact. Conventional high-temperature couplants have a maximum operating temperature of about 550{degrees}C, which limits their use for contact against ethylene cracker furnace tube surfaces that typically operate at about ... continued below

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8 p.

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Creator: Unknown. November 10, 1998.

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Description

This report summarizes the technical progress achieved during the first quarter of the ERIP project entitled, ``Laser Ultrasonic Furnace Tube Coke Monitor.`` The focus of work during this reporting period was the testing of a novel device for introducing a broad bandwidth ultrasonic pulse at the surface of a simulated furnace tube. The device employs a sacrificial stand-off composed of a fusible alloy that conforms to hot furnace tube surface upon contact. Conventional high-temperature couplants have a maximum operating temperature of about 550{degrees}C, which limits their use for contact against ethylene cracker furnace tube surfaces that typically operate at about 1000{degrees}C. In the absence of a couplant, insufficient ultrasonic energy can be transmitted from the transducer to the tube surface. By using a fusible alloy, the device efficiently couples the transducer to the hot furnace tube surface, even for rough and convex tube surfaces operating at temperatures of 1800{degrees}F and above. Initial tests confirmed the ability to resolve pulse echoes in a simulated furnace tube using a 5 MHz piezoelectric transducer with a fusible stand-off.

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8 p.

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OSTI as DE99000710

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  • Other Information: PBD: 10 Nov 1998

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  • Other: DE99000710
  • Report No.: DOE/GO/10302--T2
  • Grant Number: FG36-98GO10302
  • DOI: 10.2172/670178 | External Link
  • Office of Scientific & Technical Information Report Number: 670178
  • Archival Resource Key: ark:/67531/metadc704890

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  • November 10, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 17, 2015, 6:05 p.m.

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Laser ultrasonic furnace tube coke monitor. Quarterly technical progress report No. 2 for reporting period August 1, 1998--November 1, 1998, report, November 10, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc704890/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.