Patent · US Expired

Method and device for controlling the temperature at the outlet of a steam superheater

US6311647A · kind A · utility

11Cited by

6References

9Claims

0Family size

Assignee

ALSTOM (Switzerland) Ltd · CH

Inventors

Erhard Liebig · Laufenbürg, DE
Rudolf Herzog · Tobel, CH
Hamid Olia · Bellinzona, CH
Wolf-Stephan Wilke · Konstanz, DE
Georg Ziegler · Winterthur, CH

Key dates

Filing date	Jan 18, 2000
Grant date	Nov 6, 2001
Priority date	—
Expiry date	Jan 18, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF22G5/12
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

After the economizer, an injection water pipe branches off the connecting pipe between economizer and evaporator in order to control the steam temperature. The injection water pipe is provided with a control device for controlling the injection water flow. The injection water flowing through the injection water pipe is injected into the steam coming from the evaporator at a mixing point located before the superheater. In order to control the position of the control device in the injection water pipe, the enthalpy at the superheater outlet is calculated from the parameters pressure and temperature and is compared with a desired enthalpy resulting from the desired parameters.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.