Device and method for preventing reservoir from eutrophication

A technology for eutrophication and reservoirs, applied in chemical instruments and methods, water aeration, water/sludge/sewage treatment, etc., can solve problems such as abnormal reproduction of phytoplankton, eutrophication of reservoirs and lakes, etc. Effects of eutrophication, changing water temperature stratification, and solving the phenomenon of cold water discharge

Pending Publication Date: 2017-08-18
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device and the method make the relatively still water body in the reservoir or the lake generate vertical and lateral circulation flow throu

Method used

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  • Device and method for preventing reservoir from eutrophication
  • Device and method for preventing reservoir from eutrophication
  • Device and method for preventing reservoir from eutrophication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment is a device for preventing eutrophication of reservoirs, such as figure 1 shown. This embodiment includes: an aerator 2 arranged at the bottom of a reservoir forming a temperature stratification 1 , and the aerator is connected to an air compressor 4 arranged on the shore through an air pipeline 3 .

[0048] After the completion of the high dam, the water flow in the reservoir slows down, the renewal period of the reservoir water is lengthened, and the water body is affected by solar radiation and convective mixing and heat transfer, forming a special water temperature structure, see figure 2 . That is, under the action of sunlight and air temperature, the surface of the reservoir water absorbs most of the heat from sunlight short-wave radiation and atmospheric long-wave radiation, and the water temperature rises rapidly to be close to the air temperature. However, the temperature of the deep water in the reservoir rises slowly, and still maintains a...

Embodiment 2

[0055] This embodiment is an improvement of the first embodiment, and is a refinement of the aerator in the first embodiment. The aerator described in this embodiment includes: two hemispherical or two cylindrical opening and closing bodies 201, one side of the opening and closing bodies is provided with a hinge 202 and connected with a base 203, and the base is fixed on The bottom of the reservoir, such as image 3 shown.

[0056] The opening and closing body of the aerator described in this embodiment can be made of materials such as engineering plastics or steel to form a cylinder or sphere with an internal cavity. The contact surfaces of the two parts of the opening and closing body form an opening and closing surface, and a sealing rubber ring is arranged on the opening and closing surface. The shape of the opening and closing surface is the cross-sectional shape of the opening and closing body. When the opening and closing body is spherical, its opening and closing sur...

Embodiment 3

[0063] This embodiment is an improvement of the above embodiment, and is a refinement of the above embodiment regarding the opening and closing body. The cross-sectional shape of the opening and closing body described in this embodiment is circular (such as Figure 4 shown), square (as Figure 5 shown) or rectangular (as Figure 6 one of the shown). A sealing ring 206 and a filter screen 207 are arranged on the opening and closing surfaces of the opening and closing body.

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Abstract

The invention relates to a device and a method for preventing a reservoir from eutrophication. The device comprises an aerator arranged at temperature stratification of the bottom of the reservoir, the aerator is connected with an air compressor arranged on the shore through a gas conveying pipeline. By use of the principle that the gas density is less than the water density and the low temperature water density is greater than the high temperature water density, the relatively static water in the reservoir or a lake produces vertical or transverse circulating flows in the underwater exposure process, thereby changing the temperature stratification status and improving the reservoir environment condition about abnormal propagation of the phytoplankton; and the cold water discharge phenomenon and the reservoir and the lake eutrophication problem caused by the reservoir temperature stratification can be solved at the same time.

Description

technical field [0001] The invention relates to a device and method for preventing eutrophication of a reservoir, an environmental protection device and method for water resource protection, water ecological environment protection and restoration, and a device and method for improving water quality in water areas such as reservoirs or lakes. Background technique [0002] Reservoirs play a very important role in river governance and water resource development and utilization. The long-term retention of water in the reservoir area will cause changes in the physical and chemical properties of the water and the environment, and the water quality will show various phenomena different from those of natural flowing rivers. After the completion of the high dam, the water flow in the reservoir slows down, the renewal period of the reservoir water is lengthened, and the water body is affected by solar radiation and convective mixing and heat transfer, forming a special water temperatu...

Claims

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Application Information

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IPC IPC(8): C02F7/00
CPCC02F7/00C02F2103/007Y02W10/10
Inventor 白音包力皋穆祥鹏刘慧刘爽许凤冉钟慧荣王秀英
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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