| 摘要 |
Disclosed is a built-in steam reheater of a multi-stage impulse steam turbine, comprising one or several steam reheaters (3) arranged between the steam turbine stages, wherein a steam lead-in port (4.1) of the steam reheater is connected, by a steam guide pipe (4), to a steam lead-out port (4.2) at the front side of the preceding one or more stages; and the steam reheater further comprises an upper semicircular reheater and a lower semicircular reheater in communication with each other via upper and lower headers (3.13, 3.14, 3.24, 3.23), and is provided, on a connection surface of the upper and lower headers, with several orifices (13) which are arranged oppositely up and down and through which steam and condensed water pass. The steam reheater with an up-and-down split structure makes full use of the space in the steam turbine cylinder and uses the extracted steam of the preceding stage as the heat source of reheater, so as to increase the operational capability of the reheater and improve the performance of the saturated steam turbine. |
