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Title: Vapor spill pipe monitor

The invention is a method and apparatus for continually monitoring the composition of liquefied natural gas flowing from a spill pipe during a spill test by continually removing a sample of the LNG by means of a probe, gasifying the LNG in the probe, and sending the vaporized LNG to a remote ir gas detector for analysis. The probe comprises three spaced concentric tubes surrounded by a water jacket which communicates with a flow channel defined between the inner and middle, and middle and outer tubes. The inner tube is connected to a pump for providing suction, and the probe is positioned in the LNG flow below the spill pipe with the tip oriented partly downward so that LNG is continuously drawn into the inner tube through a small orifice. The probe is made of a high thermal conductivity metal. Hot water is flowed through the water jacket and through the flow channel between the three tubes to provide the necessary heat transfer to flash vaporize the LNG passing through the inner channel of the probe. The gasified LNG is transported through a connected hose or tubing extending from the probe to a remote ir sensor which measures the gasmore » composition.« less
Authors:
;
Publication Date:
OSTI Identifier:
6884403
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; LIQUEFIED NATURAL GAS; CHEMICAL ANALYSIS; SAMPLING; EVAPORATION; INFRARED SPECTRA; PROBES; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUEL GAS; FUELS; GAS FUELS; GASES; LIQUEFIED GASES; NATURAL GAS; PHASE TRANSFORMATIONS; SPECTRA 032000* -- Natural Gas-- Transport, Handling, & Storage; 033000 -- Natural Gas-- Properties & Composition