Steam power plant with steam turbine unit and process steam consumer, and method for operating a steam power plant with steam turbine unit and process steam consumer

Abstract

A steam power plant having at least one steam turbine unit and a process steam consumer is provided. The process steam consumer includes a heat exchanger. The steam turbine unit is connected to a heat exchanger by means of a extraction steam line, and a desuperheater is connected in the primary side of the extraction steam line, so that process steam extracted through the extraction steam line of the turbine system may be conditioned by the desuperheater to the process conditions of the process steam consumer, and the heat energy removed in the desuperheater can be fed back into the steam power plant system.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the US National Stage of International Application No. PCT / EP2010 / 058517, filed Jun. 17, 2010 and claims the benefit thereof. The International Application claims the benefits of European Patent Office application No. 09165561. EP filed Jul. 15, 2009. All of the applications are incorporated by reference herein in their entirety.FIELD OF INVENTION[0002]The invention refers to a steam power plant with steam turbine unit and process steam consumer, especially a separator for carbon dioxide as the process steam consumer. The invention also refers to a method for operating a steam power plant with a steam turbine unit and a process steam consumer.BACKGROUND OF INVENTION[0003]Steam power plants (SPP) for generating electric power essentially comprise a steam turbine unit and a fired boiler, or, in the configuration as a gas and steam turbine power plant (CCPP), comprise a gas turbine unit with downstream heat recovery steam...

AI Technical Summary

Benefits of technology

"The invention proposes a steam power plant with a steam turbine unit and process steam consumer, where the steam from the turbine unit is used in a more efficient manner. This is achieved by using a desuperheater to condition the process steam for the consumer, which allows for better use of the energy from the steam. The invention also reduces the amount of steam needed for preheating a condensate, resulting in cost savings. Additionally, the invention simplifies the process integration and reduces the number of interfacing points. Overall, the invention improves the efficiency and economics of the steam power plant."

Problems solved by technology

At this pressure level, the steam in modern power plants with reheating and high steam temperatures, however, is more highly superheated.

The energy of such highly superheated steam can be used only unsatisfactorily during normal heat transfer in heat exchangers.

For the desorption process, no advantages emerge as a result.

In particular, the energy which lies in the superheating of the steam not being optimally utilized is disadvantageous to this known method.

Also, the extraction of condensate from the water-steam cycle of the power plant for injecting into the highly superheated steam as cooling medium is costly.

Flow losses, which arise because of high-quality process steam, for example highly superheated steam, being extracted from the steam turbine unit, are a general disadvantage to steam power plants with process steam consumers which are known from the prior art, although slightly superheated steam is sufficient for the process steam consumers.

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