Research on Adding Post-unit for Back Pressure Steam Turbine

Abstract

[Introduction] In order to solve the problem of changing the external steam supply of the unit from industrial steam to heating steam , a thermal power plant is taken as an object to carry out technical feasibility study. [Method] Four kinds of schemes including the control valve group, the two-cylinder steam turbine, the post-unit back pressure steam turbine shared by the whole plant, and the steam-driven feed water pump unit with generator were compared and analyzed. [Result] Considering the characteristics of the schemes and project practice, the scheme of post-unit back pressure steam turbine shared by the whole plant is selected. [Conclusion] The scheme is based on the principle of energy level cascade utilization, which is reliable in operation and economical. It also provides a useful reference for the comprehensive steam supply transformation of subsequent units.

Keywords

• back pressure turbine
• heating
• heat supply
• post-unit steam turbine
• technology and economic comparison