Treating Pressure Swing Adsorption Process by UOP
Application: Pressure swing adsorption (PSA) process selectively adsorbing impurities from product streams. The impurities are adsorbed in a fixed-bed adsorber at high pressure and desorbed by “swinging” the adsorber from the feed to the tail gas pressure and by using … Continue reading
Oversized Rods
When packing rings have a slightly smaller bore than the piston rod diameter, the segments contact only at one end. The center portion of each ring segment provides a direct gas passage along the rod surface. This condition is permissible … Continue reading
Isooctene/isooctane Process by Refining Hydrocarbon Technologies
Application: New processes, RHT-isooctene and RHT-isooctane, can be used to revamp existing MTBE units to isooctene/isooctane production. Feeds include C4 iso-olefin feed from FCC, steam crackers, thermal crackers or on-purpose iso-butylene from dehydrogenation units. The processes uses a unique configuration … Continue reading
Oxygen Enrichment for FCC Units Process by Linde AG
Application: Increase the throughput capacity by up to 50% and/or conversion in FCC units; process heavier feeds; overcome blower limitations, also temporarily. Description: “Clean fuels” regulations are being implemented. Plus, the demand for transport fuels continually shifts toward more kerosine … Continue reading
Flow Sensors Selection
Like pressure and vacuum sensors, flow sensors are specified by flow range, size, and setpoint variability. They can be ordered with on sensor display options. Flow sensors can be specified for relatively low flow rates for one area of the … Continue reading
Single-Screw Compressors
The single-screw compressor was developed by a French physicist/engineer, Bernard Zimmern18, who began his work on the compressor in the early 1960s. French and U.S. patents were issued in 1964–1965. Initial sales in the U.S. were of machines compressing air, … Continue reading
Amine Guard FS Process by UOP LLC
Remove CO2 and H2S from natural gas; CO2 from ammonia syngas, etc., with a solution containing one of the UCARSOL family of formulated solvents offered by Dow. When desired, H2S can be removed selectively to provide a superior Claus plant … Continue reading
Undersized Rods
Using standard size packing rings with an undersized rod can still result in an effective seal as long as the rod is truly circular and is without taper. However, this generally results in an extended break-in period, with leakage greater … Continue reading
Vessels Safety
The suggestion that any refrigerant-containing component is a vessel is too broad a definition, because ANSI/ASHRAE Standard 15–94 excludes tube-type condensers and evaporators from the category of vessels. However, Section 9.11.1, which does apply to condensers, requires that the component … Continue reading
Dry Gas Seals – Maintenance Considerations
The complexity and sensitivity of dry gas seals generally requires two maintenance provisions that are not typically needed with other compressor seal designs. These include: • Sparing of the complete seal assemblies • Inspection, overhaul and testing by a qualified … Continue reading