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Research Papers: Natural Gas Technology

Wet Gas Separation in Gas-Liquid Cylindrical Cyclone Separator

[+] Author and Article Information
Robiro Molina

 PDVSA, Edificio 1, Gerencia, Campo Rojo, Punta Molina, Monagas, Venezuela

Shoubo Wang, Luis E. Gomez, Ram S. Mohan, Ovadia Shoham

Department of Petroleum Engineering, and Department of Mechanical Engineering, The University of Tulsa, Tulsa, OK 74104

Gene Kouba

 Chevron Energy Technology Company, Houston, TX 77002

J. Energy Resour. Technol 130(4), 042701 (Nov 06, 2008) (13 pages) doi:10.1115/1.3000101 History: Received August 21, 2007; Revised September 19, 2008; Published November 06, 2008

A novel gas-liquid cylindrical cyclone (GLCC© , ©The University of Tulsa, 1994), equipped with an annular film extractor (AFE), for wet gas applications has been developed and studied experimentally and theoretically. Detailed experimental investigation of the modified GLCC has been carried out for low and high pressure conditions. The results show expansion of the operational envelope for liquid carry-over and improved performance of the modified GLCC. For low pressures, the modified GLCC can remove all the liquid from the gas stream, resulting in zero liquid carry-over (separation efficiency=100%). For high pressure conditions, the GLCC with a single AFE has separation efficiency >80% for gas velocity ratio, vsg/vann3. A mechanistic model and an aspect ratio design model for the modified GLCC have been developed, including the analysis of the AFE. The model predictions agree with the experimental data within ±15% for low pressure and ±25% for high pressure conditions.

Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic of GLCC© compact separator

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Figure 2

Schematic of modified low pressure GLCC© test section

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Figure 3

Schematic of AFE

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Figure 4

Inlet section flow pattern map with experimental data range

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Figure 5

Comparison of operational envelope for liquid carry-over (8)

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Figure 6

Liquid extraction percentage for different liquid rates

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Figure 7

Liquid extraction percentage for different liquid loadings

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Figure 8

Photograph of wet gas GLCC for high pressures

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Figure 9

Liquid separation efficiency in a regular GLCC

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Figure 10

Liquid separation efficiency in a modified GLCC with single AFE

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Figure 11

Liquid separation efficiency in a modified GLCC with dual AFEs

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Figure 12

Percent liquid carry-over in a regular GLCC

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Figure 13

Percent liquid carry-over in modified GLCC with single AFE

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Figure 14

Percent liquid carry-over in modified GLCC with dual AFEs

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Figure 15

Schematic of separation analysis

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Figure 16

Droplet size distribution and separation efficiency determination

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Figure 17

Upward liquid flow split comparison for low pressure (vsl=0.15 m/s)

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Figure 18

Upward liquid flow split comparison for high pressure (p=1379 kPa and vsl=0.03 m/s)

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Figure 19

Upward liquid flow split comparison for high pressure (p=3447 kPa and vsl=0.03 m/s)

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Figure 20

Separation efficiency comparison for GLCC with dual AFEs at high pressure: (a) p=1379 kPa, (b) p=3447 kPa, and (c) p=6895 kPa

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Figure 21

Separation efficiency including data and model uncertainties

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