A Study of heat recovery of flue gas systems and improvement of boiler efficiency

The objective of this study is to assess the different modules and systems to recover waste heat energy and to extend the life span of a steam boiler and increase the efficiency of a Bosch boiler at Avipro Ltd. This study is based on a choice of modules to accomplish the objective: Economiser, Condensate Service Module, Water Service Module, Water Treatment Module, Water Analyser, Feed Water Pre Heater, Oil Supply Module, Boiler Control and Oil Circulation Module. The project analyses each module mentioned, its purpose, advantages, cost, and payback. The study showed flue gas losses are reduced by 6% when the flue gas temperature is reduced from 260 °C to 120 °C. The estimated efficiency of the boiler using the mentioned modules is about 93.1% instead of 79.1%.