Application:
Liquid product vapour pressure and composition control.
Location:
Northeast, British Columbia
Objective:
- Control bottom product vapour pressure and key component content to allow tank storage.
- Maximize liquid product recovery.
- Conserve operation uptime with major backup components.
- Vapour recovery and overhead gas compression.
Design Challenges:
- Effectively handle slugs, water, and other contaminants from upstream process equipment.
- Provide compression for both site storage tank vapours and overhead residue gas to recycle into main plant gas stream.
- Sparing capacity for major components subject to fouling.
Compass Solution:
- Feed drum with slug capacity and mechanical separation features to remove sediment and water.
- Split feed and tray count to optimize liquid products with capital cost.
- Compact and flexible compressors to gather vapours from tank storage and combine them with residue gas from tower. Each service individually controlled.
- Rotary vane compressor to effectively deal with gas at dew point.
Major Equipment Specifications
Vessels/ Towers
- 54” OD x 30 ft S/S 3 phase, Feed Drum
- 36” OD x 60 ft S/S Stabilizer Tower with 20 valve trays
- 24” OD x 5 ft S/S two compartment vessel for stage 1 and 2 compressor scrubber.
Exchangers
- Dual 5.80 MM Btu/hr ‘BKU’ Tower Reboiler
- Dual 5.4 MM Btu/hr 10” OD x 40 ft ‘NEN’
- Feed / Bottoms Exchanger
Compressors
- Vapour Recovery Stage – RoFlo 8D driven by a 50 HP @ 1200 RPM TEFC motor
- Combined VRU/Overhead Gas Stage – RoFlo 17HP driven by a 250 HP @ 900 RPM TEFC motor.
Product Cooler / Compressor Cooler
AXH 156ZF aerial cooler for stabilized product cooling and compressor cooling.
Other Features
REMvue 500 panel for compressor controls.
Compass Model No: LCS-7000-5.7 STABILIZER WITH EM50-VR8D/EM250-VR17HP