Design of MSF type brine circulation system for steam power plant

Abstract

Multi-Stage Flash Desalination type Brine Circulation (MSF-BC) is one of the desalination technology that utilises thermal heat in water treatment systems, which is used as a pre-treatment by purifying seawater into freshwater. In this design, MSF-BC design criteria are discussed that can meet the water needs of the 3 × 315 MW steam power plant generator with a water requirement of 130 m^3/hour. MSF-BC works with the principle of evaporation of seawater, and then the water vapour is condensed and produces distillate products. The design starts by determining the initial parameters of the design that is seawater data. Then do mass and energy balance calculations, heat transfer, and performance parameters using Performance Ratio (PR). The calculation shows that the temperature difference for each stage is 4.50 degree Celcius with a heat transfer area of 5154.2 square meter and the resulting distillate product is 131.42 tons/hour. The specifications of the pipe used are Copper-Nickel 90-10 with an outer diameter of 25.4 mm, pipe length of 2.22 m, and the number of pipes in the heat recovery stage are 2240 pieces with nine stages while in the heat rejection stage as many as 3060 pieces with three stages and performance ratio is 4.4.