Technical solutions for a modernized TPE-216M boiler in a highly efficient unit

Abstract

A design is presented for a modernized lignite-fired TPE-216M boiler for a highly efficient 225-MW powergenerating unit, which can be installed at the Kharanorskaya state area power plant (Station No. 3). The boiler has a guaranteed gross efficiency of 92.5%, and satisfies modern ecological requirements: NO x concentration of less then 300 mg/m 3 in the flue gases, owing to the high gross efficiency of the unit, which is no less than 40%, NO x emissions computed per 1 kW · h are reduced additionally by 10%, and the same applies to CO 2 emissions. The temperature of the steam is raised from 545 to 565°C. A low-pressure water economizer, which is included in the heat diagram of the unit, is installed to lower the temperature of the exiting gases.Note. The averaged and degraded compositions are given in the numerator and denominator, respectively.