Application of Combustion Air Pre-Heating to 50T/H Water Tube Boilers. A Demonstration at British Sugar PLC. (York).

摘要

Energy savings worth approximately Pound 63,900 have been achieved by British Sugar plc during the four-month sugar beet processing campaign at their York factory. The company decided to improve the efficiency of the boiler plant at York by retrofitting combustion air pre-heating equipment to both boilers. Although both thermal wheel regenerators and plate heat exchangers were technically acceptable for this application, the company selected AREX plate heat exchangers which would allow the existing combustion air fans to be retained. Final monitoring during the 1987/88 campaign showed that the combustion- air pre-heat system increased boiler efficiency by 3.6% compared with a revised design figure of 3.9%. Energy savings of 22,659 GJ worth Pound 63,898 were achieved during the four months of operation, giving a simple payback period of 3.71 years on the installed cost of Pound 236,980.