Research on the Utilization of Exhaust Gas Heat for Boilers

Abstract:

The exhaust heat loss of the power plant boiler can account for more half of the boiler heat loss, exhaust gas temperature is 110~160 °Ccommonly, so the exhaust gas heat can be used to reduce the coal consumption, raise the economic benefits. Before and after the desulfurization tower of a 350 MW unit, there installs two plate heat exchangers, heating condensation water respectively, which can improve the thermal efficiency. With two heat exchangers working under the design conditions, a test was carried out based on a 350 WM unit simulation system in order to test the influence of system for unit operation characteristics. Referring to the data, the investment of the heat exchanger can achieve 2.68 g/kWh coal saving during the non-heating period and 0.2531 g/kWh during the heating period.

• Periodical: Applied Mechanics and Materials (Volume 643)
• Pages: 322-327
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.643.322
• Online since: September 2014
• Authors: Hui Bin Zhang*, Bin Li, Ya Qing Jia
• Keywords: Coal Saving, Exhaust Gas Heat, Plate Heat Exchanger, Simulation System

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