Abstract
Water treatment is the most important part of any power plant. Water from natural reservoir is fetched into plant and treated to reduce impurity level, before it is used to generate saturated steam. The saturated steam rotates turbine at high speed so that desired amount of electrical energy is generated. In this whole process water purification is very important. Proper water treatment can increase efficiency, reduce fuel consumption, increase life time of control system vessels. There are various water treatment methods and they are mainly divided into two categories • Chemical methods • Non-chemical methods (e.g. UV radiation method and Electrodialysis). Chemical water purification is concerned with a lot of different methods. These methods require special attention because of the use to harmful chemicals. Special equipments are required to handle them and this will increase the cost of power generated per unit. Nowadays, carbon foot print is a big issue for any industry. More use of chemical increase carbon footprint. So, far Electrodialysis is used to regenerate salts and chemical solutions with specific concentration. It is a modern technique which uses DC power and is capable to purify water up to drinking level. Power requirement for this system is very low compared to other chemical treatment systems. It uses almost no chemicals, so it is environmental safe and reduces the carbon footprint of the power plant. Furthermore, capital costs, operating costs, and maintenance costs are lower than chemical treatment systems. These benefits are very realistic for any industry needing purified water supply. So we are going to focus on Electrodialysis to purify boiler feed water in power plant.