A turbine plant provided with a steam bleed and a system for cooling a turbine section arranged downstream of such steam bleed

摘要

A turbine plant (1) is provided with a steam bleed valve (10) regulated to send steam towards a user (6), and with a system (13) for cooling a turbine section (3) arranged downstream of the steam bleed valve (10), in order to avoid excessive heating due to a ventilating effect; such system (13) exploits the heat generated by a closed cooling circuit of auxiliary units (21) to generate cooling steam in a vacuum line (22) upstream of the turbine section (3) to be cooled; such cooling steam is integrated by other cooling steam which is let through a regulation valve (17) arranged in parallel to the steam bleed valve (10).