Device and method for improving large reservoir stratified low-temperature water

Abstract

The invention discloses a device and a method for improving large reservoir stratified low-temperature water, aims to improve the problem of low temperature of discharged low-temperature water of an established hydropower station, and provides a device for improving the large reservoir stratified low-temperature water. The device comprises a water temperature control curtain which is arranged in a reservoir and mainly comprises a water retaining net, wherein the vertically arranged water temperature control curtain is arranged 600-1,500 m in front of a reservoir dam and is perpendicular to the extension direction of a water intake for discharge in front of the dam; the top of the water temperature control curtain is positioned below a reservoir thermocline, and the bottom of the water temperature control curtain is fixedly arranged at the bottom of the reservoir, so that the surface water and the thermocline water of the reservoir enter the water intake through the top end of the water temperature control curtain; the low-temperature water at the bottom of the reservoir is retained at the water intake by the water temperature control curtain. The temperature of the discharged water of the established power station can be effectively raised by 3-5 DEG C on the premise that the operation situation of the power station is not affected.

Description

technical field [0001] The invention relates to a device and method for increasing stratified low-temperature water in a large reservoir, and belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] High dams and large reservoirs, especially some deep reservoirs with good regulation performance, have large storage capacity and slow flow velocity. At the turn of spring and summer, the vertical temperature of the water body is clearly stratified, and the temperature of the water body in the deep water layer is low, and is less affected by temperature changes. , causing the water temperature of the reservoir to be discharged lower than that of the natural river, which will have adverse effects on downstream crops and fish. With the development of society and economy in our country, more and more attention has been paid to ecological and environmental issues. In order to avoid the adverse effects of low-temperature water disch...

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Problems solved by technology

[0004] In order to solve the limitations of the above-mentioned existing low-temperature water treatment methods for hydropower stations, the present invention aims to provide a device and method for improving stratified low-temperature water in large reservoirs. The device and method do not affect the operation status of the power station. , which can effectively increase the discharge water temperature of the built power station to 3°C-5°C

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