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Method for operating a power plant

A technology of power equipment and equipment, which is applied in the direction of mechanical equipment, engine starting, engine components, etc., and can solve problems such as energy consumption and time consumption

Inactive Publication Date: 2014-12-10
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, these known operating methods are still time and energy consuming

Method used

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  • Method for operating a power plant
  • Method for operating a power plant
  • Method for operating a power plant

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Embodiment Construction

[0054] figure 1 A simplified schematic diagram of a steam power plant that may be used to practice the method of operation of the present invention is shown. figure 1 The steam power plant includes steam turbines 17, 18, 19, steam generator 16, steam / water cycle 20 and generator 15 driven by steam turbines 17, 18, 19.

[0055] The hot combustion gases of the fossil fuel flow through the steam generator 16 and deliver energy for the generation of steam. The steam drives steam turbines comprising a high pressure steam turbine 17 , an intermediate pressure steam turbine 18 and a low pressure steam turbine 19 .

[0056] The steam leaving the low-pressure steam turbine 19 is condensed into water in a water-cooled condenser 21 and then sent back to the steam generator 16 by means of a feedwater pump 26 as a feedwater pump. The condenser 21 is part of a cooling water circuit 23 including a cooling water pump 22 . The condenser 21 and other heat loss components may have insulation ...

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Abstract

The invention relates to a method for operating a steam power plant, particularly a combined cycle power plant (10), which comprises a steam / water cycle (20) with a heat recovery steam generator (16), a water-cooled condenser (21), a feedwater pump (26) and a steam turbine (17,18,19), whereby a cooling water pump (22) is provided for pumping cooling water through said water-cooled condenser (21), and evacuating means (25) are connected to said water-cooled condenser (21) for evacuating at least said water-cooled condenser (21) The inventive operating method is related to a shut down and start-up of said power plant (10) after said shut down and comprises the steps of: a) shut down of the steam turbine (17,18,19); b) restoration of a good vacuum within the condenser (21) by using said evacuating means (25); c) stopping said cooling water pump (22) of said water-cooled condenser (21) and said evacuating means (25), and filling up at least said condenser (21) with steam up to slightly above atmospheric pressure; d) controlling the pressure with a flow of said cooling water; e) after a certain shut-down period starting the cooling water pump (22) just before start-up of the plant (10); f) starting the plant (10).

Description

technical field [0001] The present invention relates to the technology of steam power plant or combined cycle power plant. It relates to a method for operating a steam power plant or a combined cycle power plant according to the preambles of claims 1 and 2 . Background technique [0002] As explained in the document US 5,095,706, combined cycle power plants have been highly valued as power generation systems ensuring two excellent properties, namely, facilities that can achieve load variation and high thermal efficiency. In order to increase the level of superior performance as described above, research and development work has been carried out in order to improve the methods of operating power plants and equipment and appliances associated with the aforementioned methods. A recent notable activity regarding the method of operating power plants is the conversion of base load operation to daily start-stop operation (hereinafter simply referred to as DSS operation). [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K9/02
CPCF01K9/023Y02E20/16F01K9/003F01K13/02F01K23/10F01D19/00F01D21/00
Inventor W.F.D.莫尔H.奧里亚M.A.卡里洛鲁比奧J.雷恩哈德
Owner GENERAL ELECTRIC TECH GMBH