CN211849316U - Ecological flow facility of formula power station behind dam of compromise benefit and monitoring demand - Google Patents
Ecological flow facility of formula power station behind dam of compromise benefit and monitoring demand Download PDFInfo
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- CN211849316U CN211849316U CN202020024294.2U CN202020024294U CN211849316U CN 211849316 U CN211849316 U CN 211849316U CN 202020024294 U CN202020024294 U CN 202020024294U CN 211849316 U CN211849316 U CN 211849316U
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to a hydropower station. The purpose is to provide a post-dam hydropower station ecological flow discharge facility which has the advantages of less investment, strong adaptability and convenient operation. The technical scheme is as follows: the utility model provides a compromise benefit and monitor demand's ecological flow of formula power station facility of releasing behind dam which characterized in that: the facility comprises a regulation pool, a discharge device, a monitoring device and a sand blocking bank, wherein the regulation pool is arranged at the downstream of the hydropower station and is formed by a secondary weir dam, the discharge device is arranged on the secondary weir dam, the monitoring device is arranged in the discharge device, and the sand blocking bank is arranged at the front part of the discharge device.
Description
Technical Field
The utility model relates to a power station specifically relates to a compromise benefit and monitor demand's ecological flow facility of releasing of formula power station behind dam.
Background
The construction of the dam of the hydraulic and hydroelectric engineering changes the natural runoff characteristics of the river channel; the ecological flow is the minimum requirement for guaranteeing the water consumption of the downstream ecological environment, and is an important measure for guaranteeing the downstream ecological environment.
The small hydropower stations are also called rural hydropower stations, the power generation benefit of the small hydropower stations is obviously influenced by rainfall and upstream water inflow, the annual power generation time of most of the hydropower stations is only 4-8 months, and most of the power station owners run during peak power and stop generating at valley power in order to improve the power generation benefit. According to the latest small hydropower clearing and reforming requirement, the power station needs to continuously discharge ecological flow according to a verified ecological flow value, and for planning a newly-built hydropower station, the ecological flow can be discharged in the modes of presetting an ecological flow hole, setting an ecological unit, ecological scheduling and the like according to different water conservancy and hydropower engineering characteristics. Most power stations transform emptying holes, sand discharge gates and the like (or siphon pipes and the like are additionally arranged) under the condition of insufficient water or low benefit of the built power stations, and directly discharge water from the reservoir to a downstream river channel; although the discharge flow is small, the discharge flow does not pass through a power station, water waste is caused to the power station, benefits are reduced, the overall benefits of a project are damaged to a certain extent, the enthusiasm of an owner is not high, the schemes are artificially controlled, the supervision of an environmental protection department is not convenient, and the implementation difficulty is large. If the southern river adopts 10% of the annual average flow of the river channel as the ecological flow estimation, the power generation benefit of the power station is reduced by 5-10%; therefore, a new measure is needed to satisfy the requirement of ecological flow discharge without affecting the efficiency of the power station.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the above-mentioned background art, provide a formula hydropower station ecological flow facility of releasing behind dam, this facility should have the investment less, adapt to by force, convenient operation.
The technical scheme of the utility model is that:
the utility model provides a compromise benefit and monitor demand's ecological flow of formula power station facility of releasing behind dam which characterized in that: the facility comprises a regulation pool, a discharge device, a monitoring device and a sand blocking bank, wherein the regulation pool is arranged at the downstream of the hydropower station and is formed by a secondary weir dam, the discharge device is arranged on the secondary weir dam, the monitoring device is arranged in the discharge device, and the sand blocking bank is arranged at the front part of the discharge device.
And a water discharge gate is arranged on the secondary barrage.
The discharge device and the sand blocking ridge are arranged close to the river bank.
The utility model has the advantages that:
the utility model can effectively utilize the part of water quantity accumulated by the power generation station during peak power period and discharge the water quantity during valley power period, thereby avoiding generating water waste and reducing power station benefit phenomenon caused by directly discharging ecological flow from the reservoir while meeting the requirement of ecological flow real-time online monitoring; and has the advantages of less investment, strong adaptability and convenient operation.
Drawings
Fig. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a partially enlarged view of fig. 1.
Fig. 4 is a partially enlarged view of fig. 2.
Detailed Description
The present invention is further described in the following by the embodiments, which are only used for the clearer and more complete description of the present invention, but it should not be understood as the limitation of the protection scope of the present invention, and other examples of the non-essential improvement and adjustment made by the person skilled in the art according to the above contents belong to the protection scope of the present invention.
The upstream of the existing barrage 2 is a reservoir area 1, and a hydropower station 3 is arranged on the barrage.
As shown in fig. 1, a compromise benefit and monitoring demand's ecological flow facility of post-dam power station, includes second grade weir 5, and the second grade weir sets up in the barrage low reaches, is as regulation pond 3 between barrage and the second grade weir, is equipped with sluicing gate 6 and discharge apparatus on the second grade weir, still is equipped with monitoring devices on the discharge apparatus, is equipped with sediment trapping bank 8 between barrage and the second grade weir, and the sediment trapping bank is located the front portion of discharge apparatus and surrounds discharge apparatus's water inlet, and discharge apparatus and sediment trapping bank are close to the bank setting. The drainage device comprises a drainage pipe and a valve (in a conventional structure; omitted in the figure) arranged on the drainage pipe. The monitoring device is a flowmeter.
The utility model discloses a build small-scale regulation pond in the river course of power station low reaches (adjust for the day to be main), combine together the ecological flow real-time supervision of power station and regulation pond, the stagnant certain water yield before the electricity generation period or the outage, then directly adopt the regulation pond water yield to carry out the ecological flow of short period to discharge during the non-operation period, under the power station benefit prerequisite of not losing basically, ensure ecological flow and discharge. During the electricity generation, the overflow of second grade weir dam is let out down, forms the view surface of water, and when not generating electricity, the regulation pond water yield is let out through the ecological flow of bleeder mechanism for a short time period, avoids blocking the upper water body of dam and is let out down and lose the power station benefit.
The height of a water inlet of a discharge pipe of the discharge device is measured according to the overflow capacity of the storage tank at the lowest water level, the sediment accumulation of the water inlet can be avoided by the sediment trapping bank, and the position of the sediment trapping bank is preferably the deep groove side of the river channel. The area of the storage pond and the elevation of the secondary weir dam are measured and calculated according to the water quantity (12 hours of valley electricity) required by daily regulation of the ecological flow approved by the hydropower station, the elevation of the secondary weir dam is based on the criterion that the tail water level of the hydropower station is not obviously increased, and the tail water level during power generation can be reduced by the sluice gate.
In dispatching operation, the generating current amount can be switched to be ecological flow during the operation period of the hydropower station, the ecological flow during the outage period of the hydropower station is reported by taking the real-time monitoring value of the monitoring device as ecological flow data, and when the upstream water amount is smaller than the ecological flow, the bleeding device is controlled to adjust in real time.
The regulation and storage pool can be additionally opened outside a river channel, water is stored before the hydropower station is shut down, and ecological flow is discharged after the hydropower station is shut down. If the hydropower station has a certain distance from the barrage, the water surface of the regulation and storage pool can be gradually formed by adopting a mode of constructing a secondary barrage in a grading manner, and the water body required by ecological flow is stored.
The utility model discloses a mounted position and second grade weir dam elevation of second grade weir dam are calculated and are adopted following method:
if the average flow of the river is 2m for many years3The river width is 30m, and the ecological flow of the hydropower station is generally 10 percent of the annual average flow of the river, namely 0.2m3The valley power time is 12 hours, and the water storage capacity is 8640m3. In order to avoid the influence on river flood discharge, the height of a common barrage is considered to be 1.0m, and then a secondary barrage can be arranged at the position 288m downstream of a power station by calculation, and the water quantity of the secondary barrage meets the night discharge requirement.
The utility model discloses a dispatch operation adopts following method:
when the hydropower station operates, a sluice gate of the secondary weir dam is opened, and an online ecological flow monitoring system (an external control system) is connected to the power generation flow of the hydropower station; before the electricity generation is finished, the discharge device is opened, the online ecological flow monitoring system is connected into the monitoring device, the water discharge gate is closed, and the water level of the storage tank is raised to overflow.
If the longitudinal drop of a river channel at the outlet section of the hydropower station tail canal is large, and the influence of obvious flooding on the hydropower station tail water is not generated, a water discharge gate is not needed, the water directly overflows through a secondary weir dam during power generation, and the water is discharged through a discharge device during the non-power generation.
Claims (3)
1. The utility model provides a compromise benefit and monitor demand's ecological flow of formula power station facility of releasing behind dam which characterized in that: the facility comprises a regulation pool (3) which is arranged at the downstream of a hydropower station (2) and is formed by a secondary barrage (5), a discharge device (7) arranged on the secondary barrage, a monitoring device (9) arranged in the discharge device and a sand blocking bank (8) arranged at the front part of the discharge device.
2. The post-dam power station ecological flow discharge facility with both benefits and monitoring requirements according to claim 1, characterized in that: and a water discharge gate (6) is arranged on the secondary barrage.
3. The post-dam power station ecological flow discharge facility with both benefits and monitoring requirements according to claim 2, characterized in that: the discharge device and the sand blocking ridge are arranged close to the river bank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020024294.2U CN211849316U (en) | 2020-01-07 | 2020-01-07 | Ecological flow facility of formula power station behind dam of compromise benefit and monitoring demand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020024294.2U CN211849316U (en) | 2020-01-07 | 2020-01-07 | Ecological flow facility of formula power station behind dam of compromise benefit and monitoring demand |
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| CN211849316U true CN211849316U (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020024294.2U Active CN211849316U (en) | 2020-01-07 | 2020-01-07 | Ecological flow facility of formula power station behind dam of compromise benefit and monitoring demand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114594803A (en) * | 2022-02-16 | 2022-06-07 | 广东省水利水电科学研究院 | Ecological flow discharge and monitoring equipment for small hydropower station and control method thereof |
-
2020
- 2020-01-07 CN CN202020024294.2U patent/CN211849316U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114594803A (en) * | 2022-02-16 | 2022-06-07 | 广东省水利水电科学研究院 | Ecological flow discharge and monitoring equipment for small hydropower station and control method thereof |
| CN114594803B (en) * | 2022-02-16 | 2022-10-04 | 广东省水利水电科学研究院 | Ecological flow of little power station is released, monitoring facilities |
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