CN105089022A - Sediment disposal method for water inlets of power station - Google Patents
Sediment disposal method for water inlets of power station Download PDFInfo
- Publication number
- CN105089022A CN105089022A CN201410190501.0A CN201410190501A CN105089022A CN 105089022 A CN105089022 A CN 105089022A CN 201410190501 A CN201410190501 A CN 201410190501A CN 105089022 A CN105089022 A CN 105089022A
- Authority
- CN
- China
- Prior art keywords
- sediment
- gallery
- desilting tunnel
- power station
- desilting
- 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
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a sediment disposal method for water inlets of a power station, belonging to the field of hydraulic engineering. The sediment disposal method is characterized in that a sediment barrier is laid at the front edge of the water inlet of the power station along the whole line; a sediment transporting gallery is laid in front of the sediment barrier along the whole line and is connected with a sediment disposal hole of a dam foundation; a horizontal seam sediment disposal opening is formed in the top of the sediment transporting gallery; the width of the horizontal seam sediment disposal opening is gradually narrowed from the upstream; a cross section of the sediment transporting gallery is gradually increased from the upstream; the sediment barrier is matched with the width-variable seam type sediment transporting gallery for use to play a role of a sediment trapping trough; a strip-shaped flushing funnel can be formed in front of the sediment barrier, so that the sediment disposal effect of cleaning the sediment in front of the water inlet of the power station is really realized.
Description
Technical field:
The present invention relates to a kind of intake of hydropower station and get rid of coarse sediment technology, particularly relate to the technology that the not wide narrow slit type flush gallery that broadens of a kind of employing carries out sand discharge, belong to hydraulic engineering field, IPC international Patent classificating number is E02B9/00, E02B9/04, E02B1/00.
Background technology:
On heavily silt-carrying river, sand erosion is very serious to the destruction that the hydraulic turbine causes.For high water head hinge, arranging bottom hole for sand flushing or flood and sand discharging hole is reduce the effective measures that rough sand crosses machine.Bottom hole for sand flushing is generally arranged in the bottom of powerplant intakes, utilizes flood discharge to form erosion funnel before powerplant intakes, reduces rough sand and crosses machine.For low water head river channel hinge, it is more difficult that bottom hole for sand flushing is arranged in powerplant intakes bottom, is arranged in powerplant intakes both sides, and erosion funnel scope is less, is difficult to reach desirable sand-flash effect.The type powerplant intakes leading edge is generally long in addition, and single sand discharge hole cannot realize its object at all, arranges multiple sand discharge hole be difficult to again arrange along water inlet leading edge.Gallery top on power station unit inducer base plate, eight Pan Xia power stations arranges wide gap sand discharge, and operation result shows, mouth door flow velocity is little, draws husky hole conveyance capacity little, draws husky scope little, and easily produce silting in gallery.
Summary of the invention:
It is difficult to arrange for low water head river channel hinge powerplant intakes desilting works, and be difficult to reach the problems such as desirable sand-flash effect, inventor, through Theoretical Design and a large amount of hydraulic model tests, devises a kind of employing narrow slit type flush gallery that broadens and carries out the method for sand discharge.Technical scheme of the present invention is as follows:
A sand discharge method for powerplant intakes, comprises building and lays and the method for operation:
(1) building is laid: arrange dam foundation desilting tunnel on the right side of described powerplant intakes, described dam foundation desilting tunnel is provided with desilting tunnel access door and desilting tunnel service gate; One sediment trapping bank is laid completely in the leading edge of described powerplant intakes, gallery for sediment transport is laid before described sediment trapping bank, described gallery for sediment transport is connected with described dam foundation desilting tunnel, horizontal joint sediment ejection opening is provided with at described gallery for sediment transport top, the width of described horizontal joint sediment ejection opening narrows gradually from upstream, and the cross section of described gallery for sediment transport increases gradually from upstream;
(2) method of operation: non-flood period and power station error-free running period, described desilting tunnel service gate is in closed condition, when silt height before described sediment trapping bank is close to sediment trapping bank height, open described desilting tunnel service gate, carry out sand discharge, when formed before described sediment trapping bank complete draw hourglass bucket time, close described desilting tunnel service gate; When flood in flood season, described desilting tunnel service gate is held open.
Sand discharge method of the present invention, has following several inventive points:
(1) sediment trapping bank and gallery for sediment transport with the use of, serve the effect cutting husky groove, prevent rough sand from entering powerplant intakes;
(2) the narrow slit type gallery for sediment transport that broadens is adopted first, namely the horizontal joint sediment ejection opening at gallery for sediment transport top narrows from the width gradually from upstream, and gallery for sediment transport increases gradually from upstream, both work in coordination, the erosion funnel of a strip can be formed, the sand-flash effect of " clear in front of the door " before really reaching powerplant intakes before sediment trapping bank.
(3) existing gallery for sediment transport and sediment ejection opening are arranged on the slope section of powerplant intakes, near the entrance in power station, although flow velocity is large herein, scouring force is strong, but increase suddenly because current enter slope section flow velocity, be unfavorable for the precipitation of coarse sediment, and close to entrance, cause a large amount of coarse sediment to enter power station.Sediment trapping bank of the present invention and gallery for sediment transport, be preferably arranged on the end of the flat slope section of powerplant intakes, namely water inlet is about to from flat slope section the position becoming slope section, is conducive to the sediment of coarse sediment, discharge.
Sand discharge method of the present invention, principle is simple, and easy construction, water consumption is little, and can prevent power station from running rear silt for a long time and enter unit runner, sand-flash effect is remarkable.
Accompanying drawing illustrates:
The sand discharge building layout plan that Fig. 1, sand discharge method of the present invention adopt
The skiagraph of the narrow slit type flush gallery that broadens that Fig. 2, the present invention adopt
The sectional drawing of the narrow slit type flush gallery that broadens that Fig. 3, the present invention adopt
In figure, 1 is powerplant intakes, and 2 is sediment trapping bank, 3 galleries for sediment transport, and 4 is horizontal joint sediment ejection opening, and 5 is dam foundation desilting tunnel, 6, desilting tunnel access door, and 7 is desilting tunnel service gate.
Detailed description of the invention:
Below in conjunction with embodiment and accompanying drawing 1-3, the invention will be further described:
The sand discharge method of powerplant intakes of the present invention, comprises building and lays and the method for operation:
(1) building is laid: arrange dam foundation desilting tunnel 5 on the right side of described powerplant intakes 1, described dam foundation desilting tunnel 5 is provided with desilting tunnel access door 6 and desilting tunnel service gate 7.Lay one sediment trapping bank 2 completely in the leading edge of described powerplant intakes 1, before described sediment trapping bank 2, lay gallery for sediment transport 3.Described gallery for sediment transport 3 is connected with described dam foundation desilting tunnel 5, and be provided with horizontal joint sediment ejection opening 4 at described gallery for sediment transport 3 top, the width of described horizontal joint sediment ejection opening 4 narrows gradually from upstream, and the cross section of described gallery for sediment transport 3 increases gradually from upstream.Sediment trapping bank 2 and gallery for sediment transport 3 should be arranged in the flat slope section of powerplant intakes as far as possible, the end of preferred flat slope section, and flow condition herein, is conducive to the alluvial of coarse sediment, are also conducive to the sand surfing of horizontal joint sediment ejection opening.Due to the horizontal joint sediment ejection opening 4 at gallery for sediment transport 3 top, banded water outlet flow forms the eddy current of structure disturbance in flush gallery, greatly strengthen the sediment carrying capacity of current, make alluvial at the silt rapid deflation of flush gallery and perimeter zone, thus form the erosion funnel of a strip at powerplant intakes forward position sediment trapping bank, to guarantee that silt cannot enter unit runner.Wherein, the size of gallery for sediment transport 3 and horizontal joint sediment ejection opening 4 can in conjunction with power station total size, and the incoming water and sediment in river, is determined by conventional design, calculating means.
(2) method of operation: non-flood period and power station error-free running period, described desilting tunnel service gate 7 is in closed condition, when silt height before described sediment trapping bank 2 is close to sediment trapping bank 2 height, open described desilting tunnel service gate 7, carry out sand discharge, when formed before described sediment trapping bank 2 complete draw hourglass bucket time, close described desilting tunnel service gate 7; When flood in flood season, described desilting tunnel service gate 7 is held open, and reduces rough sand and enters unit runner.
In the present invention, the upstream of described gallery for sediment transport 3 and horizontal joint sediment ejection opening 4, refers to the left side of powerplant intakes 1; The downstream of gallery for sediment transport 3 and horizontal joint sediment ejection opening 4, refers to the right side of powerplant intakes 1.
The invention solves low water head river channel hinge sand discharge building difficult arrangement, layout is conveniently difficult to reach the problems such as desirable sand-flash effect, and principle is simple, water consumption is little, practical, river channel hinge power station is built in the river compared with high concentration of sediment to having in river course water there is higher practical value.
Claims (1)
1. a sand discharge method for powerplant intakes, comprises building and lays and the method for operation:
(1) building is laid: arrange dam foundation desilting tunnel on the right side of described powerplant intakes, described dam foundation desilting tunnel is provided with desilting tunnel access door and desilting tunnel service gate; One sediment trapping bank is laid completely in the leading edge of described powerplant intakes, gallery for sediment transport is laid before described sediment trapping bank, described gallery for sediment transport is connected with described dam foundation desilting tunnel, horizontal joint sediment ejection opening is provided with at described gallery for sediment transport top, the width of described horizontal joint sediment ejection opening narrows gradually from upstream, and the cross section of described gallery for sediment transport increases gradually from upstream;
(2) method of operation: non-flood period and power station error-free running period, described desilting tunnel service gate is in closed condition, when silt height before described sediment trapping bank is close to sediment trapping bank height, open described desilting tunnel service gate, carry out sand discharge, when formed before described sediment trapping bank complete draw hourglass bucket time, close described desilting tunnel service gate; When flood in flood season, described desilting tunnel service gate is held open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190501.0A CN105089022A (en) | 2014-05-07 | 2014-05-07 | Sediment disposal method for water inlets of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410190501.0A CN105089022A (en) | 2014-05-07 | 2014-05-07 | Sediment disposal method for water inlets of power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105089022A true CN105089022A (en) | 2015-11-25 |
Family
ID=54570282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410190501.0A Pending CN105089022A (en) | 2014-05-07 | 2014-05-07 | Sediment disposal method for water inlets of power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105089022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017184005A1 (en) | 2016-04-21 | 2017-10-26 | Tesla Tomislav | Vacuuming sediment from river reservoirs |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004308377A (en) * | 2003-04-10 | 2004-11-04 | Tom Jacobsen | Method and apparatus for removing sediment near intake of water pipe |
| CN201713794U (en) * | 2010-06-22 | 2011-01-19 | 中国水电顾问集团北京勘测设计研究院 | Desilting facility |
| CN102304912A (en) * | 2011-07-21 | 2012-01-04 | 中国水电顾问集团华东勘测设计研究院 | Sink-type top inflow sand flushing gallery structure |
| CN103882839A (en) * | 2014-02-27 | 2014-06-25 | 黄河水利委员会黄河水利科学研究院 | Sediment releasing system for water intake of low-head river channel pivotal power station |
| CN103882838A (en) * | 2014-02-27 | 2014-06-25 | 黄河水利委员会黄河水利科学研究院 | Sediment releasing method for water intake of low-head river channel pivotal power station |
| CN203701055U (en) * | 2014-02-27 | 2014-07-09 | 黄河水利委员会黄河水利科学研究院 | Variable width seam type sand conveying device |
| CN203904944U (en) * | 2014-04-24 | 2014-10-29 | 天津虹炎科技有限公司 | Desilting system at water inlets of power station |
| CN203904946U (en) * | 2014-04-24 | 2014-10-29 | 天津虹炎科技有限公司 | Sediment transport device |
-
2014
- 2014-05-07 CN CN201410190501.0A patent/CN105089022A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004308377A (en) * | 2003-04-10 | 2004-11-04 | Tom Jacobsen | Method and apparatus for removing sediment near intake of water pipe |
| CN201713794U (en) * | 2010-06-22 | 2011-01-19 | 中国水电顾问集团北京勘测设计研究院 | Desilting facility |
| CN102304912A (en) * | 2011-07-21 | 2012-01-04 | 中国水电顾问集团华东勘测设计研究院 | Sink-type top inflow sand flushing gallery structure |
| CN103882839A (en) * | 2014-02-27 | 2014-06-25 | 黄河水利委员会黄河水利科学研究院 | Sediment releasing system for water intake of low-head river channel pivotal power station |
| CN103882838A (en) * | 2014-02-27 | 2014-06-25 | 黄河水利委员会黄河水利科学研究院 | Sediment releasing method for water intake of low-head river channel pivotal power station |
| CN203701055U (en) * | 2014-02-27 | 2014-07-09 | 黄河水利委员会黄河水利科学研究院 | Variable width seam type sand conveying device |
| CN203904944U (en) * | 2014-04-24 | 2014-10-29 | 天津虹炎科技有限公司 | Desilting system at water inlets of power station |
| CN203904946U (en) * | 2014-04-24 | 2014-10-29 | 天津虹炎科技有限公司 | Sediment transport device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017184005A1 (en) | 2016-04-21 | 2017-10-26 | Tesla Tomislav | Vacuuming sediment from river reservoirs |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103882838B (en) | A kind of sand discharge method of low water head river channel hinge powerplant intakes | |
| CN103882839B (en) | A kind of sand flushing system of low water head river channel hinge powerplant intakes | |
| CN204112294U (en) | Dual channel formula flow velocity controlled ecological fish pass | |
| WO2014201742A1 (en) | Debris flow drainage trough planning and designing method and application thereof | |
| CN112281770B (en) | Flood discharge structure adopting bottom hole and surface hole combined flood discharge and energy dissipation | |
| CN103410130A (en) | Multi-purpose tunnel arrangement structure | |
| CN203904944U (en) | Desilting system at water inlets of power station | |
| CN107203674A (en) | Tidal reach tributary inlet door water diversion project fluidised form ameliorative way | |
| CN203701055U (en) | Variable width seam type sand conveying device | |
| CN203904946U (en) | Sediment transport device | |
| CN201915369U (en) | Vehicle sheet water flow control and energy dissipation structure for high overfall dam | |
| CN203021973U (en) | Sand intercepting groove | |
| CN206706699U (en) | Ramp type sand surfing structure | |
| CN204753696U (en) | Water intaking structure for mountain channel | |
| CN204825802U (en) | Compound line type overflow weir | |
| CN105781856A (en) | Up-and-down river channel water energy power station | |
| CN106869090B (en) | Dreg-blocking board sub-assembly and diversion tunnel debris retaining Slagoff method | |
| CN105089022A (en) | Sediment disposal method for water inlets of power station | |
| CN105089021A (en) | Sediment disposal system for water inlets of power station | |
| CN106013009B (en) | A kind of more counter-slope formula stiling basins | |
| CN205712294U (en) | A kind of oil field river water system | |
| CN202017192U (en) | Flow regulating structure of water outlet channel bend | |
| CN105089025A (en) | Sediment transport device | |
| CN208151985U (en) | Sluice " L " type trash rack pier and its " zigzag " arragement construction | |
| CN104099908B (en) | Gravity type sand obstructing and guiding structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |