Development and Commercialization of Two 5 Million Btu/hr Pulse CombustionCommercial/Industrial Steam Boilers with Modulating Capabilities. Annual Report, October 1990-September 1991

摘要

The report represents the 4th year accomplishments of the expanded project. Aprototype 2,500,000 Btu/hr boiler module was designed, built and tested. Initial stability problems were analyzed and overcome. Efficiency in boiling water at atmospheric pressure was 2% below the targeted level of 86% at 1,250,000 Btu/hr input and 5% below at 2,500,000 Btu/hr input. NOx emissions were reduced by flue-gas recirculation to 31 and 24 ppm at the lower and higher input rates, respectively. The system's capability to modulate input rates without interruption of operation is maintained. It is anticipated that an increase of efficiency will be obtained.