CN110902851A - Ecological reoxygenation device for small and medium-sized river channels - Google Patents
Ecological reoxygenation device for small and medium-sized river channels Download PDFInfo
- Publication number
- CN110902851A CN110902851A CN201911044392.0A CN201911044392A CN110902851A CN 110902851 A CN110902851 A CN 110902851A CN 201911044392 A CN201911044392 A CN 201911044392A CN 110902851 A CN110902851 A CN 110902851A
- Authority
- CN
- China
- Prior art keywords
- separation
- water
- piers
- small
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention discloses an ecological reoxygenation device for a small and medium-sized river channel, which comprises a low water head gravity dam arranged on the river channel, wherein at least two separation piers are sequentially arranged on the low water head gravity dam, and a wedge-shaped block flip bucket with a 30-degree flip angle is arranged between the downstream tail end of the low water head gravity dam and the separation piers. According to the ecological reoxygenation device for the small and medium river channels, the separation piers have the functions of preventing the separation piers from being submerged by water level and increasing water flow disturbance besides the function of restricting narrow water flow, on the vertical plane, the width between the separation piers is increased along with the increase of elevation, namely the separation piers are prevented from being submerged by water level, the formed shot flow is prevented from being continuous in the transverse direction, and the separation cavity is connected with the external air, so that the reoxygenation effect is poor; on a horizontal plane, the width of the water passing section between the separation piers is gradually reduced along the longitudinal direction of the river channel to the downstream so as to increase the vertical disturbance of water flow, so that the gathering flow is scattered, the contact surface with air is increased, and the reoxygenation effect is improved.
Description
Technical Field
The invention relates to an ecological reoxygenation device for small and medium-sized riverways, belonging to the field of ecological water engineering.
Background
River pollution is one of the current increasingly concerned environmental problems, at present, seven rivers and river basins in China are polluted in different degrees, most of the rivers in main cities in China are polluted in different degrees, and how to solve the problem of black and odorous rivers in cities as soon as possible is a urgent task for urban environment work.
The dissolved oxygen is an important index for reflecting the pollution state of the water body, and the concentration of the dissolved oxygen in the polluted water body also reflects the strength of the self-purification capacity of the water body to a certain extent. Dissolved oxygen is one of the main factors for keeping ecological balance of water bodies in rivers and lakes. For urban river and lake water bodies seriously polluted, if the reoxygenation capacity of the urban river and lake water bodies can be recovered, the ecological system can be improved, and the self-purification capacity can be recovered. The existing reoxygenation technology based on input power can solve the problem of reoxygenation of the river channel to a certain extent, but because the cost of energy storage equipment and energy transmission equipment is higher and needs to be maintained by special personnel, the problems of higher acquisition cost, higher operation cost, poorer integration with the local environment and the like exist when the river channel is used in a remote polluted place.
CN201711111312, a river channel stepped zero-power reoxygenation system, does not consider the effect of water flow aeration, mainly considers the aeration process and effect after the formed water curtain falls down, and has poor implementation effect.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the ecological reoxygenation device for the medium and small river channels, which can supplement oxygen to the medium and small river channels in real time, and is economical, simple and convenient to operate.
The technical scheme is as follows: in order to solve the technical problem, the ecological reoxygenation device for the small and medium river channels comprises a low water head gravity dam arranged on the river channel, wherein at least two separation piers are sequentially arranged on the low water head gravity dam, and a wedge-shaped block flip bucket with a 30-degree spraying angle is arranged between the downstream tail end of the low water head gravity dam and the separation piers.
Preferably, the downstream surface of the separation pier and the downstream surface of the low water head gravity dam are on the same vertical plane, on the horizontal plane, the width of the water passing section between the separation piers is gradually reduced along the longitudinal direction of the river channel to the downstream, and on the vertical plane, the width between the separation piers is increased along with the increase of the elevation.
Preferably, the separation pier is provided with an air supply channel leading to the tail part from the top.
Preferably, the width of the widest part of the split pier is H, and the width between two adjacent split piers is H, wherein H is H.
In the invention, in order to improve reoxygenation effect, three key measures and corresponding means are added, namely ① separation pier, the separation pier has the functions of restraining narrow water flow, preventing water level from submerging the separation pier and increasing water flow disturbance, and the specific design in the application is that the preferable conditions are that the downstream surface of the separation pier and the downstream surface of the low-water-head gravity dam are on the same vertical plane, on the horizontal plane, the width of the water cross section between the separation piers is gradually reduced along the longitudinal direction of the river channel and the downstream direction, and on the vertical plane, the width of the water cross section between the separation piers is increased along the longitudinal direction of the river channel, so that the separation piers are prevented from submerging by the water level, the formed jet flow is prevented from being continuous in the transverse direction, the separation cavity is connected with external air, so that reoxygenation effect is poor, on effect is caused by the gradual reduction of the width of the water cross section between the separation piers along the longitudinal direction of the river channel on the vertical plane, so that the jet flow is dispersed, the contact surface with the air, the air entrainment flow is increased, the air injection channel is fully contacted with the air injection, so that the air injection channel is increased, the air injection channel is increased, the air injection channel, the aeration effect is increased, and the aeration effect is increased, so that the aeration effect is increased, and.
Has the advantages that: the ecological reoxygenation device for the small and medium-sized river channels has a simple structure, is convenient to maintain, can be arranged in a stepped manner, can be combined with the local environment to form a river channel diversion landscape, and has a certain popularization value; the separation piers have the functions of preventing water level from submerging the separation piers and increasing water flow disturbance besides the function of restricting narrow water flow, and on the vertical plane, the width between the separation piers is increased along with the increase of elevation, namely the separation piers are prevented from submerging by the water level, so that the formed jet flow is prevented from being continuous in the transverse direction, the connection between the isolated cavity and the external air is prevented, and the reoxygenation effect is poor; on a horizontal plane, the width of the water passing section between the separation piers is gradually reduced along the longitudinal direction of the river channel to the downstream so as to increase the vertical disturbance of water flow, so that the gathering flow is scattered, the contact surface with air is increased, and the reoxygenation effect is improved.
Drawings
FIG. 1 is a three-dimensional schematic diagram of an ecological reoxygenation engineering facility.
Fig. 2 is a sectional view of the flip bucket.
Fig. 3 is a three-dimensional schematic view of a separation pier.
FIG. 4 is a three-dimensional view of the gas supply channel
FIG. 5 is a schematic longitudinal sectional view of a jet stream.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The ecological reoxygenation device for the medium and small river channels comprises a low water head gravity dam 2 arranged on the river channel, wherein at least two separation piers 4 are sequentially arranged on the low water head gravity dam 2, the height of each separation pier 4 is designed to be 20cm, the width of the widest part of each separation pier 4 is H, the width between every two adjacent separation piers 4 is H, the H is H, a wedge flip bucket 3 with a flip angle of 30 degrees is arranged between the downstream end of the low water head gravity dam 2 and the separation piers 4, preferably, the flip bucket 3 is a right-angled triangle wedge block, the height of the low water head gravity dam 2 is smaller than 1m, and cobblestones are paved on the surfaces of the dam and the separation piers 4.
In the invention, the downstream surface of the separation pier 4 and the downstream surface of the low water head gravity dam 2 are on the same vertical plane, on the horizontal plane, the width of the water passing section between the separation piers 4 is gradually reduced along the longitudinal direction of the river channel to the downstream, and on the vertical plane, the width between the separation piers 4 is increased along with the increase of the elevation. The width between the separation piers 4 increases along with the increase of the elevation, which is beneficial to the drainage of water flow with larger flow. The width between the separation piers 4 is gradually reduced along the longitudinal direction of the river channel to the downstream, which is beneficial to increasing the vertical turbulence of the water body and increasing the longitudinal thickness of the jet water flow.
In the invention, the separation pier 4 is provided with the air supply channel 5 leading to the tail part from the top part of the separation pier 4, and the air supply channel 5 is connected with the external atmosphere and the bottom cavity of the incident flow, so that sufficient air is contained in the bottom cavity of the incident flow.
A working principle of ecological reoxygenation engineering measures based on river landscape comprises the following steps: a low dam and a separation pier 4 are arranged on the river channel, incoming flow is narrowed after passing through the separation pier 4, and the incoming flow is ejected by a flip bucket 3 and flows into the downstream river channel. The low-head gravity dam 2 is arranged to raise the water level, the separation piers 4 narrow the river course, the flow velocity of water flow passing through the separation piers 4 is increased, the width of the water passing section between the separation piers is gradually reduced (laterally contracted) towards the downstream along the longitudinal direction of the river course, and the water flow is influenced by shock waves generated by the action of the water flow and the side walls of the separation piers in the flowing process, so that the particle of the water is strongly turbulent in the vertical direction, on one hand, the scattering range of the jet flow formed by the flip bucket is larger, the contact area with air is increased, and the amount of air capable of being entrained by the water flow is increased (as shown in figure 5, and the label 9 is a jet flow water tongue formed without lateral contraction); moreover, the coverage of the jet flow in the longitudinal direction of the river channel is increased, water molecules which can be separated from the free surface 7 and are generated by the impact of the jet flow and the water flow of the river channel are increased, and the amount of the water molecules 6 which fall into the river channel and carry air is increased. In order to guarantee the duration of sufficient aeration of water flow and air, a flip bucket 3 is arranged at the tail end of the separation pier, the water flow after the narrow bundle of the separation pier forms a flip flow under the action of the flip bucket, a flip flow water tongue 10 is arranged in a cavity 8, in order to guarantee that the lower edge 12 of the flip flow water tongue is sufficiently mixed with enough air in the cavity 8 (the water flow is mixed with air to generate negative pressure), an air supplementing channel 5 is arranged and connected with the cavity and the outside, air flowing from the outside to the cavity is formed through the air supplementing channel under the action of the normal outside air pressure and the negative pressure difference of the cavity, air is supplied to the cavity 8 from a channel outlet 13, and the air in the cavity 8 is guaranteed to be sufficient (as shown in figure 5).
Under the normal condition, the inflow flow change is less in the middle-size and small-size river course, and when the inflow flow increased, prevented that rivers from submerging the tonifying qi passageway entry, on the vertical plane, the width increased along with the elevation increase between the design separation mound, promptly: along with the increase of the high-rise, the area of the water passing section on the unit height is increased, and the flow of water passing on the water passing section on the unit height is increased.
On the river channel, a plurality of river ecological reoxygenation facilities disclosed by the patent can be arranged in a cascade manner and are used in combination with the communication engineering of the river channel, so that the dissolved oxygen in the water flow of the river channel can be increased, the ecological system of the river channel can be perfected, and the self-purification capacity of the river channel can be recovered; meanwhile, a 'waterfall' phenomenon is generated in the river channel, which is beneficial to the development of local diversified river channel landscape.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides a middle-size and small-size river course ecological reoxygenation device which characterized in that: the low-water-head gravity dam comprises a low-water-head gravity dam arranged on a river channel, wherein at least two separation piers are sequentially arranged on the low-water-head gravity dam, and a wedge-shaped block flip bucket with a 30-degree flip angle is arranged between the downstream end of the low-water-head gravity dam and the separation piers.
2. The ecological reoxygenation device for the small and medium-sized river channels of claim 1, which is characterized in that: the downstream surface of the separation pier and the downstream surface of the low-water-head gravity dam are on the same vertical plane, on the horizontal plane, the width of the water passing section between the separation piers is gradually reduced along the longitudinal direction of the river channel to the downstream, and on the vertical plane, the width between the separation piers is increased along with the increase of the elevation.
3. The ecological reoxygenation device for the small and medium-sized river channels of claim 1, which is characterized in that: and the separation pier is provided with an air supply channel leading to the tail part from the top.
4. The ecological reoxygenation device for the small and medium-sized river channels of claim 1, which is characterized in that: the width of the widest part of each separation pier is H, the width between every two adjacent separation piers is H, and H = H.
5. The ecological reoxygenation device for the small and medium-sized river channels of claim 1, which is characterized in that: the flip bucket is in a right-angled triangle wedge-shaped block shape.
6. The ecological reoxygenation device for the small and medium-sized river channels of claim 1, which is characterized in that: the height of the low water head gravity dam is less than 1m, and cobblestones are paved on the surfaces of the dam and the separation pier.
7. The ecological reoxygenation device for the small and medium-sized river channels of claim 1, which is characterized in that: the separation pier is 20cm in height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044392.0A CN110902851A (en) | 2019-10-30 | 2019-10-30 | Ecological reoxygenation device for small and medium-sized river channels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044392.0A CN110902851A (en) | 2019-10-30 | 2019-10-30 | Ecological reoxygenation device for small and medium-sized river channels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110902851A true CN110902851A (en) | 2020-03-24 |
Family
ID=69814737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911044392.0A Pending CN110902851A (en) | 2019-10-30 | 2019-10-30 | Ecological reoxygenation device for small and medium-sized river channels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110902851A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2006511A6 (en) * | 1986-06-19 | 1989-05-01 | En France | Method and device for improving the reoxygenation of water in line with barrages |
| KR20070068992A (en) * | 2005-12-27 | 2007-07-02 | 한국건설기술연구원 | Apparatus for opening and closing the entrance of river filteration system |
| CN202610773U (en) * | 2012-04-13 | 2012-12-19 | 中国水利水电科学研究院 | Energy dissipater for side wall aerator and outlet submersible pick flow ridge of inclined shaft type flood discharging tunnel |
| CN204000751U (en) * | 2014-07-30 | 2014-12-10 | 河北工程大学 | A kind of from the gravity-type oxygen-doped dam body that sluices |
| CN204753513U (en) * | 2015-05-11 | 2015-11-11 | 浙江水利水电学院 | Dam with from energy dissipation function |
| EP2954118A1 (en) * | 2013-02-08 | 2015-12-16 | Presidenza Consiglio Ministri - Dipartimento | Conveyor suitable for lifting floating waste or other waste just under the water surface |
| CN107673464A (en) * | 2017-11-13 | 2018-02-09 | 重庆大学 | A kind of power reoxygenation system of river course staged zero |
| CN108442340A (en) * | 2018-02-09 | 2018-08-24 | 杨凌职业技术学院 | A kind of three-dimensional whole-section aeration bank |
-
2019
- 2019-10-30 CN CN201911044392.0A patent/CN110902851A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2006511A6 (en) * | 1986-06-19 | 1989-05-01 | En France | Method and device for improving the reoxygenation of water in line with barrages |
| KR20070068992A (en) * | 2005-12-27 | 2007-07-02 | 한국건설기술연구원 | Apparatus for opening and closing the entrance of river filteration system |
| CN202610773U (en) * | 2012-04-13 | 2012-12-19 | 中国水利水电科学研究院 | Energy dissipater for side wall aerator and outlet submersible pick flow ridge of inclined shaft type flood discharging tunnel |
| EP2954118A1 (en) * | 2013-02-08 | 2015-12-16 | Presidenza Consiglio Ministri - Dipartimento | Conveyor suitable for lifting floating waste or other waste just under the water surface |
| CN204000751U (en) * | 2014-07-30 | 2014-12-10 | 河北工程大学 | A kind of from the gravity-type oxygen-doped dam body that sluices |
| CN204753513U (en) * | 2015-05-11 | 2015-11-11 | 浙江水利水电学院 | Dam with from energy dissipation function |
| CN107673464A (en) * | 2017-11-13 | 2018-02-09 | 重庆大学 | A kind of power reoxygenation system of river course staged zero |
| CN108442340A (en) * | 2018-02-09 | 2018-08-24 | 杨凌职业技术学院 | A kind of three-dimensional whole-section aeration bank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203559454U (en) | Stratified water taking device for dam water inlet | |
| CN113981917B (en) | Overflow structure of hydropower station | |
| CN104452693B (en) | Fishway inlet adaptable to water level change and designing method thereof | |
| CN110306495B (en) | Hydraulic guiding type urban river garbage collection device and collection method thereof | |
| CN108731893B (en) | Omnidirectional current-making pipeline system of underwater vibrating table | |
| CN110902851A (en) | Ecological reoxygenation device for small and medium-sized river channels | |
| CN111350171A (en) | Low-head dam fishway with high silt content and large fluctuation of water head | |
| CN103614986B (en) | It a kind of is applicable to the pressure free current inlet method that Tailings Dam drains off floodwaters | |
| CN113684791B (en) | Arc-shaped waterscape dam based on vortex floating guide and design method thereof | |
| CN207646698U (en) | Training for sediment structure with suspended sediment collecting function | |
| CN212294570U (en) | Energy dissipation pool with inverted triangular wedge tail pier | |
| CN212896232U (en) | Reduce pond structure that disappears of bottom plate pulsating pressure | |
| CN109083107B (en) | Aeration facility for forming aeration cavity by utilizing water flow centripetal force inertia turbulence | |
| CN203977377U (en) | Sediment trapping training for sediment structure | |
| CN207862874U (en) | Hydraulic automatism subtracts silt system before a kind of overflow dam | |
| CN209429072U (en) | Fish pass inlet device and the fish pass makeup of the imports | |
| CN209011283U (en) | A kind of sponge novel urban rainwater separate system | |
| CN110055925B (en) | Water storage and sand discharge separation system for large and medium reservoir in flood season of sandy river | |
| CN203514274U (en) | Crashing type combined underflow energy dissipater structure | |
| CN208151985U (en) | Sluice " L " type trash rack pier and its " zigzag " arragement construction | |
| CN108149644B (en) | Hydraulic automatic silt-reducing system in front of rolling dam and construction method | |
| CN203821345U (en) | Three-side inflowing flush gallery structure | |
| CN202323893U (en) | Hydroelectric power station capable of being built densely | |
| CN112813918A (en) | A silt is led and is removed structure for water conservancy facility | |
| CN212103957U (en) | Low-head dam fishway with high silt content and large fluctuation of water head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200324 |