22-10-2014, 02:05 PM
Abstracts: Steam generators are widely used in industries for several purposes like power production, processing, heating etc. In industry steam generators are the Major fuel consumers. In a normal steam generator about 4% of hot water is wasted as Blow down. Due to this, a large amount of heat energy is wasted. This project aims to bring a heat recovery system to prevent heat losses, so that a large savings can be made. So in this a heat recovery system was designed to minimize the losses. Excellent heat transfer is desired in boiler operation. By maintaining clean heat transfer surfaces energy savings will occur. The operating costs are made smaller by reducing the amount of oil or coil that must be burned to heat the boiler water into steam. The fouling of boiler heat transfer surfaces can be minimized by ensuring proper boiler chemistry is maintained. Specifically be reducing the impurity levels that are suspended in boiler water. Removal of these impurities has been a problem ever since boilers started to operate. Draining then adding new water to the boiler has been the most used method to reduce these levels. These operations are known commonly in the boiler operation field as boiler blow down. Boiler blow down is necessary to reduce maintenance costs but still requires additional money to heat the incoming replacement water. Using some of the heat from this blow down waste water would save the boiler operating company money. In addition to using some of the heat from blow down water additional savings may be proven if a portion of the blow down water could be treated and returned for re-use in the boiler.