Method for using waste heat by separately fetching water from power station condenser

A technology of condenser and power station, applied in the field of machinery, can solve problems such as the inability to start an absorption heat pump device, and achieve the effects of meeting the water temperature requirements of the heating network, the device being simple and easy to operate, and improving the economy.

Active Publication Date: 2014-02-12
肖弘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this waste heat utilization technology is that, in the low temperature of winter, in order to meet the water temperature requirements of the heating network, the steam turbine must be operated in a reduced vacuum to increase the cooling water outlet temperature of the condenser, otherwise the absorption heat pump device cannot be started

Method used

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  • Method for using waste heat by separately fetching water from power station condenser
  • Method for using waste heat by separately fetching water from power station condenser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] like figure 1 As shown, for the double-flow condenser, there are front and rear water chambers at the front and rear ends of the condenser shell. The front water chamber is the cooling water inlet and outlet water chamber, which is connected to the front tube plate by bolts , the rear water chamber is the cooling water return water chamber, which is welded with the rear end tube plate, and the front and rear end tube plates are connected with the condenser shell as a whole. Divide the tube bundle in the first process into two high-heat areas 1, and the rest as low-heat areas 2. The high-heat area 1 and the low-heat area 2 are separated by a partition plate 5 in the water chamber; similarly, the second process tube bundle is also divided into Two high heat zones 3 and one low heat zone 4, the high heat zone 3 and the low heat zone 4 are separated by a partition plate 5 in the water chamber, and both tube bundle zones have their own corresponding inlet and outlet water ch...

Embodiment 2

[0019] figure 2 Indicates a tube bundle module on one side of the condenser centerline, and an even number of such tube bundle modules are often symmetrically arranged in the lower shell of the condenser. like figure 2 As shown, for the double-flow condenser, there are front and rear water chambers at the front and rear ends of the condenser shell. The front water chamber is the cooling water inlet and outlet water chamber, which is connected to the front tube plate by bolts , the rear water chamber is the cooling water return water chamber, which is welded with the rear end tube plate, and the front and rear end tube plates are connected with the condenser shell as a whole. Divide the most upstream independent tube bundle of the steam flowing on the shell side of the condenser into a high-heat zone 7, and the rest of the tube bundles as a low-heat zone 6. The water chambers of the high-heat zone 7 and the low-heat zone 6 are independent of each other. Import and export wa...

Embodiment 3

[0021] The specific embodiment can also be a combination of the above scheme 1 and scheme 2. that is figure 2 In addition to the already divided high heat area 7, the original low heat area 6 is divided into similar figure 1 High heat zones 1, 3 and low heat zones 2, 4 are shown in .

[0022] When the condenser of the power station is in operation, the steam entering the condenser from the exhaust port of the steam turbine flows into the tube bundle area along the steam channel around the tube bundle area for condensation and heat exchange, and the remaining uncondensed steam-gas mixture flows into the air cooling area for final condensation and then from The suction port is pumped, thereby establishing and maintaining the vacuum of the steam turbine. When the steam on the shell side of the condenser condenses and releases heat in the high heat area and low heat area, it transfers heat to the heat pump return water and main cooling water on the tube side. The return water ...

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Abstract

The invention discloses a method for using waste heat by separately fetching water from a power station condenser. The method comprises the following steps of 1, dividing a tube bundle area of the power station condenser into a high-heat area with relatively high heat load and a low-heat area with relatively low heat load; 2, respectively arranging a water-inlet chamber and a water-outlet chamber on each of the high-heat area and the low-heat area on the water side of the condenser; 3, introducing low-temperature cooling water led from the corresponding water-outlet chamber of the low-heat area of the condenser to a cooling tower or another cooling water source to reduce temperature, returning the cooling water to the corresponding water-inlet chamber of the low-heat area of the condenser to absorb heat and increase the temperature, and circulating the steps in such a way; introducing high-temperature cooling water from the water-outlet chamber of the high-heat area of the condenser, after the high-temperature cooling water is conveyed to the evaporator of a heat pump device to release heat, returning the water to the corresponding water-outlet chamber of the high-heat area of the condenser to absorb heat and increase the temperature, and circulating the steps in such a way.

Description

technical field [0001] The invention relates to a method for utilizing exhaust heat of a steam turbine, in particular to a method for structural arrangement of a condenser in a power station, and belongs to the field of mechanical technology. Background technique [0002] In modern steam power plants, more than 50% of the heat energy released by fuel combustion is lost to the environment through the circulating cooling water of the condenser. In order to recycle the low-temperature waste heat of this part of the condenser, there is currently a way to extract the waste heat of the cooling water of the condenser by installing an absorption heat pump device. Circulating water enters the water main pipe, and the heating steam source of the absorption heat pump comes from the extraction steam of the steam turbine. The power plant heat pump device can be used for regional heating in winter in the north, heating condensed water, seawater desalination and industrial production. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K17/06
Inventor 汪国山吕亚飞
Owner 肖弘
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