Steam power plant

Abstract

An inventive steam power plant comprises at least one steam turbine and a steam generator, whereby a combustion chamber, in the direction of the flow of steam, is mounted after a first turbine stage and before a second turbine stage of the steam turbine, and the flow of steam inside a combustion chamber can be heated by mixing it with a hot gas that can be produced inside said combustion chamber.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application is the US National Stage of International Application No. PCT / EP2004 / 008348, filed Jul. 26, 2004 and claims the benefit thereof. The International Application claims the benefits of German Patent application No. 20313279.3 DE filed Aug. 27, 2003, both of the applications are incorporated by reference herein in their entirety.FIELD OF THE INVENTION [0002] The invention relates to a steam power plant with at least one steam turbine and a fired steam generator. BACKGROUND OF THE INVENTION [0003] With known steam power plants operating steam for a steam turbine is generally generated in a fired steam generator, with the energy contained in a hot gas being transferred to one or more heat exchangers, which are supplied with water, such that operating steam can be generated by heating this water, or which are supplied with steam such that superheating of the steam can be achieved by means of a last-mentioned heat exchanger; suc...

AI Technical Summary

Benefits of technology

[0026] The internal additional firing implemented by means of the combustion chamber of a claimed steam power plant can be made available very quickly during operation of the steam turbine. It only requires ignition of the fuel introduced into the combustion chamber; the time required in particular to heat up known heat exchanger surfaces in particular is not required.

[0027] A claimed steam power plant also has the advantage that combustion products and / or waste gas do not necessarily have to be removed from the combustion chamber by means of a separate discharge facility, as they are carried along with the flow of steam and can be extracted at another point in the steam circuit, for example the said condenser. Also a higher steam temperature can be achieved with the invention, without having to change the design of the steam generator.

[0028] A claimed steam power plant can in particular also be used to supply energy in peak load periods or to boost the system frequency of an electrical energy supply network; a claimed steam power plant allows fast output regulation and can be used in a very flexible manner.

Problems solved by technology

Since with the heat exchangers known from the prior art, which are used in steam generators of known steam power facilities, the energy from a hot gas is transferred to the medium to be heated by means of a material of the heat exchanger surface heated by the hot gas, the quantity of energy that can be transferred to the medium to be heated, for example water and / or steam, is limited by the material characteristics of the heat exchanger surface.

With known steam power facilities the permissible steam temperatures are therefore limited, since the heat exchanger surface transferring the thermal energy cannot be heated up to an arbitrary high temperature due to its material characteristics and the thermal load limits associated therewith.

The thermal transfer of hot gas to the medium to be heated is also subject to a delay, essentially due to the time required to heat up the heat exchanger surface.

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