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Method for increasing the efficiency of a combined gas/steam power station with integrated gasification combined cycle

A technology for fuel gasification and power plants, applied in steam engine installations, combined combustion mitigation, machines/engines, etc., to achieve the effect of reducing power and efficiency loss

Inactive Publication Date: 2008-10-15
SIEMENS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This saves cooling air resulting in increased efficiency

Method used

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  • Method for increasing the efficiency of a combined gas/steam power station with integrated gasification combined cycle
  • Method for increasing the efficiency of a combined gas/steam power station with integrated gasification combined cycle
  • Method for increasing the efficiency of a combined gas/steam power station with integrated gasification combined cycle

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Embodiment Construction

[0027] The IGCC power plant 10 shown schematically in FIG. 1 essentially consists of a gas turbine 12 and a gas turbine-compressor 14 connected upstream of the gas turbine 12 . Fuel, such as bituminous coal, is gasified in a gasification unit 16 for producing synthesis gas. The oxygen required for the gasification is produced in an air decomposition plant 18 in which oxygen is produced from air by fractional distillation. Air is usually taken from the environment and, by means of a gas turbine-compressor and / or a gas-turbine additional compressor, via compressor 20, fed to the air splitting plant 18 and compressed to the pressure required for fractionation.

[0028] The synthesis gas produced in the gasification unit 16 is cooled in a synthesis gas cooling unit 22 before further processing and then fed into a gas cleaning unit 24 . In the gas cleaning device 24, a filter (not shown) first retains the ash particles and then, if necessary, also removes carbon dioxide. Other ha...

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Abstract

The present invention relates to a method for increasing the efficiency of a combined gas / steam power station (10) with integrated gasification combined cycle. Said power station comprises a gas turbine compressor (14) and an air-separation unit (18) having a defined working pressure. Compressed air is removed from the gas turbine compressor (14) at a pressure level that is adapted to the working pressure of the air-separation unit (18). The removed air is then supplied to the air-separation unit (18) where the air is broken down into its individual constituents, especially oxygen and nitrogen. The nitrogen produced in the air-separation unit (18) is removed from the air-separation unit and at least a part of the removed nitrogen quantity is used as a coolant in the gas / steam power station in order to improve its efficiency.

Description

technical field [0001] The invention relates to a method for increasing the efficiency of a combined gas and steam power plant with an integrated fuel gasifier, which has a gas turbine-compressor and an air splitting plant operating at a defined pressure. Background technique [0002] In the past decade, many power plants based on the combined gas and steam process have been built in the world, and through it, the emission of harmful substances can be significantly reduced. In professional jargon these power plants are called GUD power plants ("combined steam and gas turbine power plants"). [0003] In the basic form of a GUD power plant, the so-called IGCC power plant ("IGCC" refers to the abbreviation "Integrated Gasification Combined Cycle"), the GUD power plant additionally has an integrated fuel gasifier, by means of which liquid or solid fuel, Bituminous coal, for example, is converted in a gasifier to synthesis gas, which is then combusted in a gas turbine. The synt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K23/06
CPCF25J3/04563F25J2245/42Y02E20/16Y02E20/18F25J2210/04F25J2240/82F25J2240/70F25J3/04545F25J3/04618F25J3/04575F25J2260/44F25J3/04606F25J3/04581F01K23/068
Inventor 沃纳·冈斯特埃里克·沃尔夫格哈德·齐默尔曼
Owner SIEMENS AG
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