Chemical cleaning of ultra-supercritical unit with ammoniated EDTA;

Discussion and research on design goals of 1000 MW ultra-supercritical unit;

Comprehensive prevention of steam oxidation and solid particle erosion for the ultra-supercritical unit;

Intensity analysis of reheat steam pipeline hot pushed elbow for ultra supercritical units;

The design characters of steam and water system in 2×1 000 MW ultra supercritical unit were analyzed.

Steel P122 for1 000 MW ultra supercritical unit main steam pipe is of poor weldabilify and easy of crack.

USC units require higher water quality to boiler make-up water.

The paper describes USC unit thermal construction characters of Guodian Beilun power plant project,phaseⅢ,including divided area and system management,construction demonstration process card,secondary design,cleaned installation and HT HP component installation,which can be a reference for thermal-control construction management.

Application of foundation fieldbus control technology in 1000 MW ultra-supercritical units;

Research on the domestic P92 steel pipe-fittings for ultra-supercritical units;

The milling system of the 1000MW ultra-supercritical units in Zouxian electric power plant carried big grains since the unit synchronized, the carbon content in slag was comparatively high which influenced the unit s economy.

This paper briefs the functions and types of steam turbine bypass of ultra-supercritical pressure generating unit and conducts the comparisons of steam turbine bypass system set-up schemes of Huaneng Yuhuan power plant’s 4×1000 MW ultra-supercritical pressure units and Huadian International Zouxian power plant’s phase IV project 2×1000 MW ultra-supercritical pressnre units.

The 1 000 MW extra-supercritical units in China are mainly Shanghai Turbine Manufactured-Siemens,Dongfang Turbine Manufactured-Hitachi and Harbin Turbine Manufactured-Toshiba models.