H-Coal Pilot Plant: letdown-valve experience through Coal Run No. 7 in the H-Coal Pilot Plant, E-3. [Runs 1 thru 7]
This report covers the development of the various letdown valves used for the two-stage high pressure and temperature coal slurry letdown system as used at the H-Coal Pilot Plant. The period covered in this report was from the prestart-up oil circulation through Coal Runs No. 1 - No. 7. The valves covered are the Willis, which was used exclusively from Coal Runs No. 1 - No. 5, the Cameron and the Kieley and Mueller. The LV-202B Kieley and Mueller and LV-204B Cameron valves again showed little valve wear during short Coal Run No. 7, which demonstrates that the full potential of these valve designs has not been achieved yet. The problem with the Kieley and Mueller plug freezing will be looked at further, with addition of grease ports and a possible new designed plug shaft and stem guide being made for the valve. The Willis valves developed the same body leaks around the bonnet areas that occurred during Coal Run No. 6. This will be looked at before Coal Run No. 8, but no further trim development is planned. To summarize the progress of the LV-202 and LV-204 valves, the Willis was developed to last about 100 hours, which is the expected life for this valve design in our coal liquefaction process; whereas, the Cameron and Kieley and Mueller valves have lasted for days with good results. The Cameron and Kieley and Mueller valves still have not reached their full potential in plant operation, and, along with the new Masoneilan Sasol, Masoneilan Prototype, Hammel Dahl and Paul valves, future progress in Coal Run No. 8 for the high pressure and temperature letdown valves is anticipated.
- Research Organization:
- Ashland Synthetic Fuels, Inc., KY (USA)
- DOE Contract Number:
- AC05-76ET10143
- OSTI ID:
- 6040671
- Report Number(s):
- DOE/ET/10143-14; ON: DE83012530
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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