Steam introduction device in a power plant

US6189871A · kind A · utility

Assignee

• Asea Brown Boveri, S.A. · CH

Inventors

• Rainer Schlageter · Albbruck, DE
• Vaclav Svoboda · Baden, CH

Key dates

• Filing date: Apr 24, 1999
• Grant date: Feb 20, 2001
• Expiry date: Apr 24, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S261/13
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a steam power plant, a bypass line (2), which serves for diverting steam during the startup or rundown of the power plant, is arranged between the boiler and condenser (9). Arranged in the bypass line (2), upstream of the condenser (9), is a steam introduction device (1), in which the steam, before being introduced into the condenser (9), is expanded and cooled. The steam introduction device (1) has a first perforated diaphragm (3), a cooling chamber (4) and a second perforated diaphragm (8). According to the invention, the first perforated diaphragm (3) consists of a single spherical part. By virtue of this shape, the perforated diaphragm (3) possesses favorable mechanical and thermal stability, with the result that it becomes possible to have small wall thicknesses and production by pressing. After pressing, the orifices (12) in the perforated diaphragm are made by once-only drilling and are in each case at an equal distance from the orifices next to them. The perforated diaphragm (3) is distinguished by increased operating reliability and lower fabrication costs.