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Steam turbine condenser water-supplementing and deoxidizing system

A technology of condenser and steam turbine is applied in the field of steam turbine to achieve the effects of reliable operation, simple operation and simple structure

Active Publication Date: 2013-01-30
FULL DIMENSION POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a steam turbine condenser water replenishment and oxygen removal system to solve the problem of existing large steam turbines with large flow water replenishment and oxygen removal

Method used

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  • Steam turbine condenser water-supplementing and deoxidizing system
  • Steam turbine condenser water-supplementing and deoxidizing system
  • Steam turbine condenser water-supplementing and deoxidizing system

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Embodiment

[0042]It is used for replenishing water and deoxidizing the condenser of a 300MW steam turbine. The design pressure of the condenser is 4.9kpa, and the design pressure inside the deaeration device 11 is 15kpa. 12. There are 240 small holes of φ10 on the water spray header 12. The heating steam is extracted from the 6-section steam extraction pipe of the steam turbine body. The steam enters the steam header 13 through the steam pipe 2. There are 120 φ10 holes on the steam header 13. The extraction pressure of this section is 0.173MPa, which can prevent the 0.1MPa make-up water from being sucked into the turbine and causing accidents. The replenishing water at 20 degrees is sprayed into the water replenishing and deoxygenating device 11 with a design pressure of 15kpa and an outer diameter of φ924x12 through the small hole of φ10, and it is fully diffused, and the heat released by the heating steam is fully absorbed in the space with a jet length of about 500mm , is heated to 36...

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Abstract

The invention discloses a steam turbine condenser water-supplementing and deoxidizing system and relates to a steam turbine technology. The steam turbine condenser water-supplementing and deoxidizing system comprises a water-supplementing pipeline, a steam pipeline, a water outlet pipeline, a water-supplementing and deoxidizing device, a water sealing device, a restriction orifice and the like; water supplemented to the system is heated by steam from steam extraction of a steam turbine body; the temperature of the heated supplemented water is 3-3.5 degrees higher than the saturation temperature of a condenser under an operating pressure, thereby providing a flash evaporation effect; and after the hot water enters a hot well of the condenser, part of steam is extracted out through flash evaporation, and oxygen dissolved in the water can escape together with the steam, thereby achieving the purpose of deoxidizing. Both the water supplementing quantity and the steam extraction quantity of the system are regulated through a flow regulating valve, and the flow regulating valve is controlled by a distributed control system (DCS). According to the system disclosed by the invention, the condenser itself does not need to be reconstructed, the structure is simple, and the operation is reliable.

Description

technical field [0001] The invention relates to the technical field of steam turbines, and relates to a water replenishment and oxygen removal system for a steam turbine condenser. Background technique [0002] At present, many pure condensing units have been modified for heating and extraction, which brings about the problem of water replenishment and deoxygenation. Common condenser water replenishment and deoxygenation can be achieved by spraying nozzles at the throat or adding bubbling deoxygenation inside the hot well. device way. According to the HEI standard, the flow of cold water directly entering the condenser cannot exceed 5% of the exhaust steam volume, otherwise the deoxygenation effect cannot be guaranteed, so the atomization of the throat nozzle cannot meet the requirements of large water replenishment and deoxygenation. The method of adding a bubbling deaerator inside the hot well needs to add a deaerator in the condenser hot well, introduce heating steam, he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28B9/04F28B9/10
Inventor 陈春峰王德权刘亚奇孟伟徐克鹏李宝清
Owner FULL DIMENSION POWER TECH
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