Design of a MSF Desalination Plant to be Supplied by a New Specific 42 MW Power Plant Located in Iran

Authors: Rouzbeh Shafaghat, Hoda Shafaghat, Fatemeh Ghanbari, Pouya Sirous Rezaei, Rohollah Espanani

Abstract:

Nowadays, desalination of salt water is considered an important industrial process. In many parts of the world, particularly in the gulf countries, the multi-stage flash (MSF) water desalination has an essential contribution in the production of fresh water. In this study, a simple mathematical model is defined to design a MSF desalination system and the feasibility of using the MSF desalination process in proximity of a 42 MW power plant is investigated. This power plant can just provide 10 ton/h superheated steam from low pressure (LP) section of heat recovery steam generator (HRSG) for thermal desalting system. The designed MSF system with gained output ratio (GOR) of 10.3 has 24 flashing stages and can produce 2480 ton/d of fresh water. The expected performance characteristics of the designed MSF desalination plant are determined. In addition, the effect of motive water pressure on the amount of non-condensable gases removed by water jet vacuum pumps is investigated.

Keywords: Design, dual-purpose power plant, mathematical model, MSF desalination.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1071586

References:

[1] A. Gambier, M. Fertig and E. Badreddin, "Hybrid modeling for supervisory control purposes for the brine heater of a multi stage flash desalination plant," Proceedings of the American Control Conference Anchorage, 2002, pp. 5060-5065.
[2] N. Wade and K. Callister on, "Desalination: the state of the art," Meeting of the Institutions South Eastern Branch, 1996, pp. 87-97.
[3] K. A. Al-Shayji, "Modeling, simulation, and optimization of large-scale commercial desalination plants," Dissertation of Doctor of Philosophy, 1998.
[4] E. A. Hawaidi and I. M. Mujtaba, "Sensitivity of brine heater fouling on optimization of operation parameters of MSF desalination process using PROMS," 20th European Symposium on Computer Aided Process Engineering- ESCAPE20, 2010.
[5] H. I. El-Dessouky, H. Shaban and H. Al-Ramadan, "Steady state analysis of multi stage flash desalination process," Desalination, vol. 103, pp. 271-287, 1995.
[6] U. J. H. Gibbons, "Using desalination technologies for water treatment," Recommended by U.S. Congress, Office of Technology Assessment, OTA-BP-O-46 (Washington, DC: U.S. Government Printing Office), 1988.
[7] A. M. Helal, "Uprating of Umm Al Nar East 4-6 MSF desalination plant," Desalination, vol. 159, pp. 43-60, 2003.
[8] M. R. S. Okelah and I. A. Tag, "Performance evaluation of a MSF desalination plant in Qatar," Engineering Journal of Qatar University, vol. 5, pp. 249-263, 1992.
[9] N. M. Wade, (2001) "Distillation plant development and cost update," Desalination, vol. 136, pp. 3-12, 2001.
[10] H. El-Dessouky,H. Ettouney, F. Al-Juwayhel and H. Al-Fulaij, "Analysis of multistage flash desalination flashing chambers," Chemical Engineering Research and Design, vol. 82(A8), pp. 967-978, 2004.
[11] O. A. Hamed, K. Ba-Mardouf, H. Al-Washmi, K. Al-Shail, H. Abdullah and A. Al-Wadie, "Assessment of the major design features of SWCC MSF desalination plants," 4th SWCC Acquired Experience Conference, 2004.