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Condensing separator - a new device and gas preparation system

UDK: 622.276.8.05 : 665.62
DOI: 10.24887/0028-2448-2019-12-77-81
Key words: separator, gas, preparation technology, separation, processes and systems for gas preparation, vapor condensation from a gas stream, hydrophilic surface, super-hydrophobic surface, separation packing, structured surface, test of separation devices
Authors: A.I. Vlasov (Gazpromneft NTC LLC, RF, Saint-Petersburg), A.V. Mikhailov (Slavneft-Megionneftegas JSC, RF, Megion), V.D. Fedorenko (Gazprom Neft PJSC, RF, Saint-Petersburg), A.A. Novikov (Gubkin University, RF, Moscow), M.V. Gorbachevskii (Gubkin University, RF, Moscow), D.S. Kopitsyn (Gubkin University, RF, Moscow), V.A. Vinokurov (Gubkin University, RF, Moscow), M.I. Farahov (EPC Ingehim LLC, RF, Kazan), M.M. Farahov (EPC Ingehim LLC, RF, Kazan)

The efficiency of the separation process during field processing largely determines the quality of gas and oil, affecting their subsequent transportation, use, and consumption. Separation devices make a significant contribution to separation efficiency. The current level of technological development and accumulated knowledge in the field of materials science allow us to create a design of space-separated separation devices with the inclusion of super-hydrophobic and hydrophilic (biphilic) materials with a given geometric configuration on their surface, thereby changing the wetting parameters and gas-dynamic characteristics of separation elements. Hydrophobic and super-hydrophobic materials have a number of unique functional properties - water resistance, corrosion resistance, biofouling and inorganic pollution, which is why they are of interest for a wide range of technical applications. Super-hydrophobic coatings significantly change the modes of heat transfer and mass transfer, making them promising for industrial applications to improve the thermodynamics, gas dynamics and energy efficiency of various gas preparation processes. The most reliable and scalable method for creating super-hydrophobic surfaces is surface treatment with self-assembly of structures with a “hierarchical roughness” on it. In this work, a method for producing separation devices with a biphilic surface is investigated. In the course of the work, several combinations of mesh packings with various surface types were tested. The tests were carried out on a bench separation unit in a vertical gas stream. During the study, the change in the separation coefficient was studied. Compared to separation using only a mesh packing, when using two separation elements, the separation coefficient initially exceeds 90%. The best combination was a combination of a hydrophobic heat exchanger and a biphilic mesh packing. Based on the data obtained, a promising pilot industrial product, a “condensing separator,” was sketched.

References

1. Shirtcliffe N.J., McHale G., Newton M.I., Learning from superhydrophobic plants: The use of hydrophilic areas on superhydrophobic surfaces for droplet control, Langmuir, 2009, V. 25, no. 24, pp. 14121–14128.

2. Feng L., Zhang Z., Mai Z. et al., Super-hydrophobic and super-oleophilic coating mesh film for the separation of oil and water, Angewandte Chemie International Edition, 2004, V. 43, no. 15, pp. 2012–2014.

3. He M., Wang J., Li H., Song Y., Super-hydrophobic surfaces to condensed micro-droplets at temperatures below the freezing point retard ice/frost formation, Soft Matter, 2011, V. 7, no. 8, pp. 3993-4000.

4. Zhang P.A., Lv F.Y.Y., Review of the recent advances in superhydrophobic surfaces and the emerging energy-related applications, Energy, 2015, V. 82, pp. 1068–1087.

5. Jhee S., Lee K.-S., Kim W.-S., Effect of surface treatments on the frosting/defrosting behavior of a fin-tube heat exchanger, International Journal of Refrigeration, 2002, V. 25, no. 8, pp. 1047–1053.

6. Chen C.-H., Cai Q., Tsai C. et al., Dropwise condensation on superhydrophobic surfaces with two-tier roughness, Applied Physics Letters, 2007, V. 90, no. 17, pp. 173108.

7. Boreyko J.B., Chen C.-H., Self-propelled dropwise condensate on superhydrophobic surfaces, Physical Review Letters, 2009, V. 103, no. 18, pp. 184501.

8. Narhe R.D., Beysens D.A., Water condensation on a super-hydrophobic spike surface, Europhysics Letters (EPL), 2006, V. 75, no. 1, pp. 98–104.

9. Wu Y., Zhang C., Analysis of anti-condensation mechanism on superhydrophobic anodic aluminum oxide surface, Applied Thermal Engineering, 2013, V. 58, no. 1–2, pp. 664–669.

10. Liang C., Wang F., Lü Y. et al., Experimental study of the effects of fin surface characteristics on defrosting behavior, Applied Thermal Engineering, 2015, V. 75, pp. 86–92.

11. Sommers A.D., Yu R., Okamoto N.C., Upadhyayula K., Condensate drainage performance of a plain fin-and-tube heat exchanger constructed from anisotropic micro-grooved fins, International Journal of Refrigeration, 2012, V. 35, no. 6, pp. 1766–1778.

The efficiency of the separation process during field processing largely determines the quality of gas and oil, affecting their subsequent transportation, use, and consumption. Separation devices make a significant contribution to separation efficiency. The current level of technological development and accumulated knowledge in the field of materials science allow us to create a design of space-separated separation devices with the inclusion of super-hydrophobic and hydrophilic (biphilic) materials with a given geometric configuration on their surface, thereby changing the wetting parameters and gas-dynamic characteristics of separation elements. Hydrophobic and super-hydrophobic materials have a number of unique functional properties - water resistance, corrosion resistance, biofouling and inorganic pollution, which is why they are of interest for a wide range of technical applications. Super-hydrophobic coatings significantly change the modes of heat transfer and mass transfer, making them promising for industrial applications to improve the thermodynamics, gas dynamics and energy efficiency of various gas preparation processes. The most reliable and scalable method for creating super-hydrophobic surfaces is surface treatment with self-assembly of structures with a “hierarchical roughness” on it. In this work, a method for producing separation devices with a biphilic surface is investigated. In the course of the work, several combinations of mesh packings with various surface types were tested. The tests were carried out on a bench separation unit in a vertical gas stream. During the study, the change in the separation coefficient was studied. Compared to separation using only a mesh packing, when using two separation elements, the separation coefficient initially exceeds 90%. The best combination was a combination of a hydrophobic heat exchanger and a biphilic mesh packing. Based on the data obtained, a promising pilot industrial product, a “condensing separator,” was sketched.

References

1. Shirtcliffe N.J., McHale G., Newton M.I., Learning from superhydrophobic plants: The use of hydrophilic areas on superhydrophobic surfaces for droplet control, Langmuir, 2009, V. 25, no. 24, pp. 14121–14128.

2. Feng L., Zhang Z., Mai Z. et al., Super-hydrophobic and super-oleophilic coating mesh film for the separation of oil and water, Angewandte Chemie International Edition, 2004, V. 43, no. 15, pp. 2012–2014.

3. He M., Wang J., Li H., Song Y., Super-hydrophobic surfaces to condensed micro-droplets at temperatures below the freezing point retard ice/frost formation, Soft Matter, 2011, V. 7, no. 8, pp. 3993-4000.

4. Zhang P.A., Lv F.Y.Y., Review of the recent advances in superhydrophobic surfaces and the emerging energy-related applications, Energy, 2015, V. 82, pp. 1068–1087.

5. Jhee S., Lee K.-S., Kim W.-S., Effect of surface treatments on the frosting/defrosting behavior of a fin-tube heat exchanger, International Journal of Refrigeration, 2002, V. 25, no. 8, pp. 1047–1053.

6. Chen C.-H., Cai Q., Tsai C. et al., Dropwise condensation on superhydrophobic surfaces with two-tier roughness, Applied Physics Letters, 2007, V. 90, no. 17, pp. 173108.

7. Boreyko J.B., Chen C.-H., Self-propelled dropwise condensate on superhydrophobic surfaces, Physical Review Letters, 2009, V. 103, no. 18, pp. 184501.

8. Narhe R.D., Beysens D.A., Water condensation on a super-hydrophobic spike surface, Europhysics Letters (EPL), 2006, V. 75, no. 1, pp. 98–104.

9. Wu Y., Zhang C., Analysis of anti-condensation mechanism on superhydrophobic anodic aluminum oxide surface, Applied Thermal Engineering, 2013, V. 58, no. 1–2, pp. 664–669.

10. Liang C., Wang F., Lü Y. et al., Experimental study of the effects of fin surface characteristics on defrosting behavior, Applied Thermal Engineering, 2015, V. 75, pp. 86–92.

11. Sommers A.D., Yu R., Okamoto N.C., Upadhyayula K., Condensate drainage performance of a plain fin-and-tube heat exchanger constructed from anisotropic micro-grooved fins, International Journal of Refrigeration, 2012, V. 35, no. 6, pp. 1766–1778.



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