Coal-liquefaction letdown-valve operating experience at coal-liquefaction pilot plants
This report summarizes all valve operating experiences that can be gathered from public literature of the Fort Lewis and the Wilsonville solvent-refined coal (SRC) pilot plants, as well as the H-Coal and Exxon pilot plants. Monthly, quarterly, and annual reports were reviewed for information concerning the letdown valve experience. Minutes of pilot plants operators' meetings and proceedings of valve symposiums that related to SRC pilot plant letdown valves were studied. A complete listing of the reports studied is available in the references. In addition, engineers at all sites responded to frequent communications to clarify points that were thus gathered. The report discusses the valve and piping configurations and compares similarities and the lessons learned at each of the plants. Key features common to successful letdown valve include: (1) streamlined valve bodies, (2) an expanded volume exit geometry, (3) proper sizing that keeps the valve plug in an opened position, and (4) a long straight or slightly tapered choking section to delay vaporization.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5385136
- Report Number(s):
- CONF-820229-2; ON: DE82017549
- Country of Publication:
- United States
- Language:
- English
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