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Process Modeling of Liquid-Ring Compressor for Flare Gas Recovery

Mesbah, Mohammad | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46810 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Rashtchian, Davood
  7. Abstract:
  8. The main application of flares is to protect facilities, staff, and surrounding area. Nevertheless, the flares flue gas contains environmental hazardous compounds like nitrogen oxides, sulfur oxides, and greenhouse gases like carbon dioxide and carbon monoxide. These compounds may spread in environment with unburned hydrocarbons. Due to the contamination risk and energy loss in flaring system, optimization and system enhancement is of vital importance. Flare gas recovery unit consist of equipment like multi-phase separator, Liquid Seal Drum, and compressor. The compressor is the most important part of this unit. Due to the process requirements and the probability of two-phase feed entering to the compressor, in most units liquid-ring compressor is used. The gas-liquid two phase flow in this compressor is very complex and in unsteady state. In this project, the sweetening of carbon dioxide in liquid-ring compressor has been studied with the use of ANSYS FLUENT software. The Eulerian- Eulerian multiphase model, turbulent Realizable κ-ε model and sliding mesh have been used for simulating this compressor in unsteady state condition. The sliding grid interfaces are provided at the interface between rotor and gas inlet/outlet. The results showed 63% sweetening of carbon dioxide. The simulation results can be playing an important role in the optimum design of liquid ring compressor
  9. Keywords:
  10. Numerical Simulation ; Gas Sweetening ; Flare Gases Recovery ; Gas-Liquid Two Phase Flow ; Liquid-Ring Compressor

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