Abstract:

Abstract:Some problems exist in the operation of the No.1 ultra supercritical boiler of Huadian Laizhou Power Generation Company Limited, such as the large deviation of oxygen on the both sides of boiler,the higher attemperating water volume of reheater,the overtemperature of superheater tube wall and the high temperature corrosion of heating surface,etc.In order to solve these problems,an oxygen optimization and adjustment test of the boiler was conducted.In this paper,a boiler oxygen uniformity adjustment test and variable oxygen volume tests under 950MW and 800MW conditions were conducted,and the optimum operation oxygen volume and critical value of oxygen under different conditions were obtained.After the optimization,the mass fraction of carbon in fly ash and the volume fraction of CO are effectively
reduced,the problems of overtemperature of superheater tube wall and high temperature corrosion of heating surface are alleviated, which greatly improve the efficiency of the boiler.

Key words: Keywords:ultra supercritical boiler oxygen volume, uniformity, variable oxygen volume, adjustment test