Patent ID: 6813888
Filing Date: 2004-11-09
Classification: F22D

Abstract:
An integration construction between a steam boiler and a steam turbine provided with a combustion chamber, comprising:a connector structured and arranged to conduct steam from the steam boiler(10) to the steam turbine (11) for rotating an electric generator (G) generating electricity, a vaporizer (190) located in the steam boiler (10), said vaporizer (190) is structured and arranged to vaporize a supply water being circulated through the steam boiler (10) and superheated in a superheater (120), an economizer (20) acting as a heat exchanger, in which heat is transferred from the flue gases of the boiler into the supply water, and the supply water is conducted into the boiler through the economizer (20), wherein the economizer (20) is provided with at least two sections, comprising at least one first economizer section (20a1) and at least one second economizer section (20a2), which are in series, wherein the supply water being preheated with bled steams of the steam turbine is conducted in the steam boiler (10) further to the vaporizer (190) and the superheater (120) and therethrough, in the form of steam, to the steam turbine (11), another connector (19) leading to the economizer sections (20a1, 20a2) comprises a first branch point (D1) to a by-pass connector (21) of supply water, so that the at least one first economizer section (20a1) is by-passable, at least concerning part of the supply water flow, and wherein the by-pass connector (21) is connected to a preheater (14) of supply water and that from the preheater (14) a connector (21â€²) leads through a second branch point (D2) to the another connector (19) between the economizer sections (20a1 and 20a2) and that bled steam is conducted to the preheater (14) of supply water from the steam turbine (11).