Retrofitting a heating steam extraction facility in a fossil-fired power plant

A fossil fuel and equipment technology, which is applied in the field of supplementary steam extraction equipment for heating in power plants burning fossil fuels, can solve problems such as boiler unbalanced load, unreasonable energy loss, and redundant steam, and achieve the effect of optimizing thermodynamics

Inactive Publication Date: 2013-11-20
SIEMENS AG
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Problems solved by technology

Such as extraction from the reheat pipe of the steam turbine, without other costly measures will lead to unbalanced load of the boiler
Extraction of high-quality steam for CO2 separation plants must also be impossible without additional measures, as this would result in unreasonable energy losses
[0005] Another difficult problem that arises due to supplementary equipment extraction is that the now unnecessary steam is suddenly made superfluous when the extraction is stopped

Method used

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  • Retrofitting a heating steam extraction facility in a fossil-fired power plant
  • Retrofitting a heating steam extraction facility in a fossil-fired power plant

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Embodiment Construction

[0014] figure 2 According to the prior art, it represents a steam turbine installation with a steam output coupling from an overflow pipe. Here, the steam outcoupling is used for distant heating using two heating condensers HZ-K. The connection of the distance heating system to the gas and steam turbine power plant equipment is carried out through the overflow pipe of the steam turbine. There the steam (NAA) is extracted and directed via steam lines from the plant UMC to the district heating building UND. The actual district heating system in the form of 2 x 50% heating condensers is located in the district heating building UND. Single-stage remote heating is implemented according to the required remote heating power. In normal operation, the two heating preheaters together can transfer a maximum of 265MW of thermal energy to the district heating system.

[0015] As an alternative, the district heating system can also be operated with steam from the cold intermediate rehe...

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Abstract

A method for retrofitting an existing steam turbine with a steam extraction facility is provided. The stem turbine has a plurality of pressure stages and is integrated into a fossil-fired steam power plant. A steam extraction line is connected to one pressure stage or between two pressure stages of the steam turbine, and a heating steam turbine is connected into the steam extraction line.

Description

technical field [0001] Existing fossil fuel-burning power plant equipment must adapt to changing demands. Especially in steam power plants or combined gas and steam power plants, adjustments are frequently required, especially after the fact that steam extraction from the steam components of the power plant is realized afterwards. Additional extracted steam may be required as process or heating steam, for internal processes within the power plant process, or to supply other processes outside the original power plant process. The steam extracted from the turbine process is now no longer able to contribute to electricity generation, reducing the amount of remaining steam still available for use in the turbine process. Steam is thus extracted from the steam turbine process, reducing the efficiency of the steam power plant plant. Background technique [0002] In order to be able to achieve a thermodynamically optimal design while steam extraction is being performed, extraction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K7/38F01K7/22F01K17/02F01K23/10
CPCY02E20/16F01K23/10F01K17/02F01K7/22F01K17/00F01K7/38Y02E20/14
Inventor G.斯蒂夫A.皮卡德T.施奈德J-W.温
Owner SIEMENS AG
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