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ENERGY-SAVING EFFECT OF ADDITIONALLY INSTALLED LOW-PRESSURE ECONOMIZER IN THERMODYNAMIC SYSTEM OF THERMAL POWER PLANT

Yuetao Shi

Abstract

Additionally installing low-pressure economizer in the thermodynamic system of thermal power plants is one of the effective measures to lower the temperature of exhaust flue gas for energy-saving. The energy-saving principle and calculation of low-pressure economizer in thermodynamic system of a home-made 200 MW unit, as well as main characteristics of its operation, and its superiority in aspects of energy-saving and emission-reducing, have been presented. Results of practical calculation show that the additionally installed low-pressure economizer can reduce the temperature of exhaust flue gas by 28℃, saving standard coal by 3.05 g/(kW·h), having comparatively good energy-saving effect.

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Key concepts: Economizer, Flue gas, Thermal power station, Power station, Exhaust gas, Thermodynamic system, Thermal efficiency, Thermal