Filtration equipment development for coal liquids. Final report

Technical Report · Wed Nov 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6356689· OSTI ID:6356689

Smith, G. R.S.

Low filtration rates, high filter aid consumption, high maintenance, and poor reliability have all, at one time or another, characterized past attempts to filter liquefied coal. This has been true for both the leaf and drum types of precoat filters. These problems have been due to equipment design and operational procedures and leave room, therefore, for substantially higher rates and better mechanical reliability. To improve the filtration operation, an innovative 50 Square Foot Rotary Pressure Precoat Filter incorporating many new design features was designed and built. The filter has been installed at the Solvent Refined Coal (SRC) Pilot Plant in Fort Lewis, Washington. The filter has operated at design conditions while meeting the product specifications. Several bugs still exist in the machine. However, there is no recognized mechanical problem without a practical solution. Long-term test runs with definitive data acquisition have not yet been accomplished. However, during approximately three to four months of operation, the operators and maintenance men at PAMCO have learned to operate the machine and have eliminated many of the bugs inherent in a new machine. The experience to date has indicated that the filter can operate and can be expected to be an improvement over existing commercially available rotary precoat equipment. It remains to be evaluated whether these improvements justify filtration as a solid--liquid separator for SRC-I over other potential processes. It is recommended that the filter be further tested at Tacoma to obtain definitive data for use in this evaluation.

• Research Organization: Johns-Manville Sales Corp., Denver, CO (USA)
• OSTI ID: 6356689
• Report Number(s): EPRI-AF-852
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
COAL LIQUEFACTION
COAL LIQUIDS
DESIGN
FILTERS
FILTRATION
LIQUEFACTION
MINERALS
OPERATION
RECOMMENDATIONS
REMOVAL
SEPARATION PROCESSES
SOLIDS
SRC PROCESS
THERMOCHEMICAL PROCESSES