Transformation and thermal economy analysis on 1000MW ultra supercritical unit with lowtemperature fuel economizer

Abstract

Abstract:

Taking the 1000MW ultrasupercritical boiler of #1 unit in Laizhou Power Generation Company whose annual average smoke temperature reaches 126℃, management integrating flue and gas emission regulation, as well as lowtemperature economizer at outlet of air preheater are adopted to reduce the boiler exhaust temperature and absorb the boiler heat loss. It expounds the layout and water intake scheme of the lowtemperature economizer of 1000MW ultrasupercritical unit, and analyzes the thermal economy of the lowtemperature economizer by equivalent enthalpy drop method. The results demonstrate that the thermal efficiency of the unit is improved by the lowtemperature economizer. It is of feasible and practical reference value in recovery of exhaust heat.

Key words:

lowtemperature economizer；exhaust temperature, equivalent enthalpy drop method, thermal efficiency, waste heat recovery

MA Ji.

Transformation and thermal economy analysis on 1000MW ultra supercritical unit with lowtemperature fuel economizer

[J]. Huadian Technology, 2018, 40(10): 37-39.

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Transformation and thermal economy analysis on 1000MW ultra supercritical unit with lowtemperature fuel economizer

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