IDE Technologies

Design challenges and operational experience of a mega med Seawater Desalination Plant in Tianjin

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Abstract
This article is a continuation of the article 'Sliding Pressure Turbine Integrated with Seawater Desalination Facility (MED)' [1] presented at the IDA 2011 World Congress. The previous article described a unique MED-TVC plant design that is able to integrate with a sliding pressure turbine to supply motive steam to a thermal desalination process. This turbine is part of the Tianjin Beijing power station, located in the south Hangu District along the Bohai Sea. The Tianjin power plant is a highly efficient, large-scale engineering system, comprising power generation, seawater desalination and salt production from brine. It is managed as an integrative system and is a representative project of a circulating economy model in China, with the subentry of power, seawater desalination and in the future, salt production from brine, which are interdependent upon one another.

To support this type of optimal power generation cycle along with a highly efficient desalination process, the Tianjin MED-TVC operates under varying working conditions. This is possible due to its robust design, and highly flexible operation to achieve optimum electricity and water production. The MED-TVC facility includes eight desalination units, each with a capacity of 25,000 m3/day, totaling a plant capacity of 200,000 m3/day.

This article presents operational experience gained from this project, while focusing on:

  • The integration between the power plant and the MED desalination plant
  • Main design parameters of both phases of the desalination plant for enabling operational flexibility
  • Actual performance data of the desalination plant

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