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Method for regulating a short-term power increase of a steam tubine

A technology of steam turbine and power, which is applied in the steam generation method using heat carrier, steam engine device, steam superheating, etc., which can solve the problems of low degree of throttling and efficiency loss, and achieve the effect of strong regulator response

Active Publication Date: 2013-05-08
SIEMENS ENERGY GLOBAL GMBH CO & KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] But permanently throttling the turbine valve to provide reserve always results in a loss of efficiency, so throttling should be kept as low as absolutely necessary for economical operation.

Method used

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  • Method for regulating a short-term power increase of a steam tubine
  • Method for regulating a short-term power increase of a steam tubine

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Embodiment Construction

[0033] exist figure 1 The high-pressure part of the waste heat steam generator 1 is schematically illustrated in . Of course, the invention can also be used in other pressure stages for regulating intermediate superheating. figure 1 A part of the flow path 2 of the flow medium M is schematically illustrated. Of the heating surfaces of the economizer, evaporator and superheater which are usually arranged in the high-pressure part of the waste heat steam generator 1 , only the last superheater heating surface 4 is shown in the figure. The spatial arrangement of the individual superheater heating surfaces 4 in the hot gas channel is not shown and can vary. The illustrated superheater heating surfaces 4 may respectively represent a plurality of series-connected heating surfaces, but are not shown differently for the sake of clarity.

[0034] The flow medium M enters into figure 1 The part shown in is previously conveyed by the feed pump at a corresponding pressure into the hig...

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Abstract

A method for regulating a short-term power increase of a steam turbine with an upstream waste-heat steam generator is provided. The steam turbine has a number of economizer, evaporator and super heater heating surfaces forming a flow path for a flow medium. The flow medium is tapped off from the flow path in a pressure stage and is injected into the flow path on the flow-medium side between two super heater heating surfaces of the respective pressure stage. Amount of flow medium injected is regulated with a characteristic value which is a discrepancy between the outlet temperature of the final super heater heating surface and a predetermined temperature nominal value. The temperature nominal value is reduced and the characteristic value is temporarily increased more than in proportion to the discrepancy for a time period of the reduction for achieving a short-term power increase of the steam turbine.

Description

technical field [0001] The invention relates to a method for regulating the short-term power increase of a steam turbine with a upstream waste heat steam generator with a plurality of economizers forming a flow path and heated by a flow medium flowing through it. surface, evaporator heating surface and superheater heating surface, wherein in the pressure stages the flow medium branches off from the flow path and is sprayed into the flow path between the two superheater heating surfaces of the respective pressure stage with respect to the flow medium, In this case, the first characteristic value characterizing the deviation of the outlet temperature of the flow medium at the last superheater heating surface from a predetermined temperature target value for the flow medium serves as a control variable for the quantity of flow medium injected. Background technique [0002] A waste heat steam generator is a heat exchanger that recovers heat from a hot gas stream. Waste heat ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K23/10F22G5/12F01K13/02F22B1/18
CPCF22G5/12Y02E20/16F01K23/10F22B1/18F01K13/02Y02P80/15
Inventor J.布鲁克纳F.托马斯
Owner SIEMENS ENERGY GLOBAL GMBH CO & KG
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