CN112814078B - Method for cleaning silt in water inlet pool of water transfer pump station - Google Patents
Method for cleaning silt in water inlet pool of water transfer pump station Download PDFInfo
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- CN112814078B CN112814078B CN202110148952.8A CN202110148952A CN112814078B CN 112814078 B CN112814078 B CN 112814078B CN 202110148952 A CN202110148952 A CN 202110148952A CN 112814078 B CN112814078 B CN 112814078B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
- E03B5/02—Use of pumping plants or installations; Layouts thereof arranged in buildings
- E03B5/025—Use of pumping plants or installations; Layouts thereof arranged in buildings with surface tanks
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
- E03F5/108—Cleaning devices providing a flushing surge
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- Health & Medical Sciences (AREA)
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- Hydrology & Water Resources (AREA)
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- Structural Engineering (AREA)
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a sediment cleaning method for a water inlet tank of a water transfer pump station, and S1, a sedimentation tank is arranged on the opposite side of a water inlet of the water inlet tank of the water transfer pump station, and the water inlet tank and the sedimentation tank are separated by a water retaining wall; the sedimentation tank is divided into a sediment deposition area and a water diversion transition area, and the elevation of the bottom plate of the sediment deposition area is lower than that of the water diversion transition area and that of the bottom plate of the water inlet tank; s2, arranging a sand guide groove on the bottom plate of the water inlet pool, wherein the sand guide groove extends from the water inlet of the water inlet pool to the position of a water retaining wall in the sediment deposition area and is communicated with the sediment deposition area through a flow guide hole; s3, arranging a bypass water conduit in the water diversion transition area, wherein the bypass water conduit is communicated with a water pumping pipe of a water delivery pump station through an electric valve; s4, when the water pumping pipe of the water pump station pumps water normally, a water head is formed between the water inlet pool and the sediment deposition area through the combined action of the flow guide hole and the sand guide groove; and S5, regularly adopting a mud pump truck to intensively clean the silt in the silt deposition area. The invention realizes that the silt cleaning water delivery pump station does not stop, and ensures normal water supply.
Description
Technical Field
The invention relates to the field of long-distance water transfer engineering of water delivery channels, in particular to a sediment cleaning method for a water inlet pool of a water delivery pump station.
Background
In the long-distance water transfer engineering of the great river canal, a water transfer pump station is indispensable, and the water transfer pump station provides water supply safety guarantee for the sustainable development of the city economy and the society. The water transfer pump station generally comprises: forebay, maintenance gate, intake pool, water pump house and auxiliary factory building. After the water delivery pump station is put into operation, workers need to enter the water inlet tank regularly to clean deposited silt, and the water pump is required to be stopped to interrupt water supply when the silt is cleaned. At present, the problem that the water delivery pump station staff meets and remains to be solved in the course of the work has:
1. sediment deposited in the water tank after the pump station operates for one year influences the flow state of the water body, and the operation efficiency of the pump station is reduced. Taking a No. 34 water pipeline iron-west pump station of south-to-north water transfer center line matching project as an example, the size of the water inlet pool is 31.9m in length, 6.3m in width and 9.8m in depth, and the depth of silt deposited every year is about 6m, namely two thirds of the net depth of the water inlet pool; the water flows into the intake basin to the water pump inlet tube from the forebay, and the bottom of the water in the intake basin is similar to the sandy beach that rises, and the water overflows effective cross-section less, and the roughness increases.
2. Along with the operation of a pump station, after sediment in the water inlet tank reaches a certain degree, the sediment velocity of the sediment is no longer the same as that of the initial operation of the water inlet tank, the sediment velocity of the sediment is reduced, most of the sediment brought by the water body enters the water pump and is pumped into the water pipeline, and then is deposited into the water pipeline; in addition, the machine-passing silt of the water pump can also accelerate the abrasion of the impeller of the water pump.
3. The silt deposited in the cleaning water inlet tank needs to be cleaned once every year, the water pump is required to stop running and water supply is interrupted when the silt is cleaned, and the annual average cost for cleaning the silt needs more than twenty thousand, so that the operation cost of a pump station is high.
4. Silt deposited in the water inlet tank contains algae organic matters, fermentation is started in 5 months every year, bubbles on the water surface are directly seen to emerge, and the silt is most serious in October and September and pollutes the water quality of a pump station.
The reason for the defects is mainly that the flowing water contains silt and algae bacteria, the overflowing area of the water is increased after the water enters the water inlet pool, the flow speed is reduced, and conditions are created for silt deposition. Carefully observe that the relative sediment from the water inlet maintenance gate to the main overflow area of the water pump is less, the water inlet of the water pump almost forms a funnel shape, and the sediment is pumped away by the water pump. Look up present current design standard, do not have design standard and standard to water transfer pump station intake sump clearance silt specially, also do not have the provision requirement of water transfer pump station intake sump clearance silt in the relevant architectural design standard. Therefore, the method is suitable for the requirement of long-distance water supply engineering construction for cleaning silts deposited in the water inlet tank.
Disclosure of Invention
The invention aims to provide a method for cleaning sediment in a water inlet tank of a water delivery pump station, which realizes the cleaning of sediment deposited without stopping by utilizing the kinetic energy of water entering the water inlet tank and the kinetic energy provided by a water diversion pipe of a water pump.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a method for cleaning silt in a water inlet pool of a water delivery pump station, which comprises the following steps:
s1, arranging a sedimentation tank on the opposite side of the water inlet of the water pump station, so that the water inlet and the sedimentation tank are distributed on the two sides of the water inlet of the water pump station, and the water inlet and the sedimentation tank are separated by a water retaining wall; the sedimentation tank is divided into a sediment deposition area and a water diversion transition area, the sediment deposition area is positioned on one side far away from a water pumping port of the water delivery pump station, and the elevation of a bottom plate of the sediment deposition area is lower than that of the bottom plate of the water diversion transition area and the water inlet tank;
s2, at least three sand guide grooves are arranged on the bottom plate of the water inlet pool, extend from the water inlet of the water inlet pool to the position of the water retaining wall in the sediment deposition area, and are communicated with the sediment deposition area through flow guide holes arranged at corresponding positions on the water retaining wall;
s3, arranging a bypass water conduit in the water diversion transition area, wherein the bypass water conduit is communicated with a water pumping pipe of a water delivery pump station through an electric valve;
s4, when the water pumping pipe of the water delivery pump station normally pumps water, the opening of the electric valve of the bypass water conduit is adjusted, and through the combined action of the diversion hole and the sand guide groove which are arranged on the water retaining wall, a water head is formed in the water inlet pool and the sediment deposition area, so that an effective overflowing channel of the water inlet and the sediment deposition area is formed in the water inlet pool, on one hand, sediment brought by the water inlet of the water inlet pool is pushed into the sand guide groove at the water inlet by using the kinetic energy of the water body, the sediment is kept to move to the sediment deposition area in the sand guide groove, on the other hand, the sand pulling effect of the sediment in the water inlet pool is achieved by using the water head of the sediment deposition area and the water inlet pool, and the sediment in the water inlet pool is conveyed and deposited in the sediment deposition area;
and S5, according to the sediment condition of the sediment in the sediment deposition area, regularly and intensively cleaning the sediment in the sediment deposition area by using a mud pump truck.
Preferably, the bottom plate of the sediment deposition area is a horizontal plane, the bottom plate of the water diversion transition area is an inclined plane which is inclined downwards towards the sediment deposition area, and the gradient is 5-7% so as to be beneficial to keeping sediment in the sediment deposition area; the setting principle of the elevation difference that the elevation of the bottom plate of the sediment deposition area is lower than that of the floor of the diversion transition area is as follows: the capacity of sediment deposition in one week of the water transfer pump station is met.
Preferably, the sand guide groove is an arc-shaped groove, and the flow guide holes formed in the water retaining wall are square flow guide holes.
Preferably, the bottom plate of the water inlet tank is an inclined surface which is inclined downwards towards the sedimentation tank, and the gradient is 2-3%.
The advantages of the invention are embodied in the following aspects:
1. reduce the interior sediment deposit of water transfer pump station intake pond, improve the water flow state in the intake pond, the water overflows effective cross-section and stabilizes, improves water transfer pump station operating efficiency.
2. Reduce the silt of the water pump and the abrasion of the water pump impeller.
3. The working procedure of regularly cleaning the sediment deposited in the water inlet tank of the water transfer pump station is simple, and the mud pump truck is adopted to perform centralized sediment cleaning on the sediment area of the sediment deposition tank, so that the labor force is reduced, and the working efficiency is improved; meanwhile, the water delivery pump station is not stopped, and normal water supply is guaranteed.
4. Sediment deposited in a water inlet tank of the water delivery pump station is cleaned in time, and the pollution of algae organic matters in the deposited sediment to the water quality of the pump station is restrained.
5. The large-area work of cleaning deposited silt in the water inlet pool of the water transfer pump station is avoided, and the operating cost of the pump station is saved; the special cost for cleaning sediment deposition of one existing running water transfer pump station is about 25 ten thousand yuan per year; the preliminary measurement and calculation are carried out, the cost for cleaning the sediment by the pump station is about 1000 yuan per week, the annual cleaning cost is 5 ten thousand yuan per year, and the pump station can be ensured to continuously operate for a long time, so that the water supply reliability and the water supply quality are improved.
Drawings
FIG. 1 is a schematic layout of the water transfer pump station, the water intake pool and the sedimentation pool of the present invention.
Fig. 2 is a sectional view taken along the direction N-N of fig. 1 (rotated by 90 ° clockwise).
Fig. 3 is a sectional view (rotated 90 ° clockwise) from K1 to K1 of fig. 1.
Fig. 4 is a sectional view taken from the direction of K2-K2 of fig. 1 (rotated 90 ° clockwise).
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1-4, the method for cleaning silt in the water inlet pool of the water delivery pump station comprises the following steps:
s1, constructing the water inlet pool 2 and the sedimentation pool 3 at the same time in the construction period of the water transfer pump station 1, so that the water inlet 2.1 and the sedimentation pool 3 of the water inlet pool 2 are distributed on two sides of the water inlet pool of the water transfer pump station 1, thereby being beneficial to cleaning sediment in the water inlet pool 2, and the bottom plate of the water inlet pool 2 is an inclined plane which is inclined downwards towards the sedimentation pool 3, and the gradient is 3%; the water inlet pool 2 and the sedimentation pool 3 are separated by a concrete water retaining wall 4, and the area of the sedimentation pool 3 is 20 percent of that of the water inlet pool 2; the sedimentation tank 3 is divided into a sediment deposition area 3.1 and a water diversion transition area 3.2, and the sediment deposition area 3.1 is positioned on one side of a water pumping port far away from the water delivery pump station 1; the bottom plate of the sediment deposition area 3.1 is a horizontal plane, the bottom plate of the water diversion transition area 3.2 is an inclined plane which is inclined downwards towards the sediment deposition area 3.1, and the gradient is 5% so as to be beneficial to keeping sediment in the sediment deposition area; the bottom plate elevation of sediment deposit district 3.1 is less than the bottom plate elevation of diversion transition district 3.2 and intake pond, and specifically, the difference in elevation design principle that sediment deposit district 3.1 bottom plate elevation is less than diversion transition district 3.2 floor elevation is: the sediment deposition capacity of the water delivery pump station within 1 week is generally 3-5 m;
s2, according to the width of a water inlet 2.1 of a water inlet pool 2, 3-5 sand guide grooves 2.2 with arc-shaped bottom planes are arranged on a bottom plate of the water inlet pool 2, and when the width of the water inlet 2.1 is less than or equal to 3m, 3 sand guide grooves 2.2 with arc-shaped bottom planes are arranged on the bottom plate of the water inlet pool 2; when the width of the water inlet 2.1 is more than 3 meters and less than or equal to 4 meters, 4 sand guide grooves 2.2 with arc-shaped bottom planes are arranged on the bottom plate of the water inlet pool 2; when the width of the water inlet 2.1 is more than 4 meters, 5 sand guide grooves 2.2 with arc-shaped bottom planes are arranged on the bottom plate of the water inlet pool 2. Each sand guide groove 2.2 extends from a water inlet 2.1 of the water inlet pool 2 to a position of a water retaining wall 4 positioned in a sediment deposition area 3.1 and is communicated with the sediment deposition area 3.1 through a square flow guide hole 4.1 arranged at a corresponding position on the water retaining wall 4, and the sum of the flow areas of the square flow guide holes 4.1 is equal to the flow area of a bypass water guide pipe 3.3 arranged in a water guide transition area 3.2; the total width of the sand guide groove 2.2 is selected to meet the requirement of the width range surrounding the water inlet 2.1;
s3, arranging a bypass water conduit 3.3 in the water diversion transition area 3.2, wherein the bypass water conduit 3.3 is communicated with a water pumping pipe 3.5 which is close to the water diversion transition area 3.2 in the water delivery pump station 1 through an electric valve 3.4;
s4, when a water pumping pipe of the water delivery pump station 1 normally pumps water, the opening of an electric valve 3.4 of a bypass water conduit 3.3 is adjusted, and through the combined action of a square diversion 4.1 and a sand guide groove 2.2 arranged on a water retaining wall 4, a water head is formed between a water inlet pool 2 and a sediment deposition area 3.1, so that an effective overflowing channel between the water inlet 2.1 and the sediment deposition area 3.1 is formed in the water inlet pool 2; on one hand, silt brought by the water body at the water inlet 2.1 of the water inlet pool is pushed into the sand guide groove 2.2 at the water inlet 2.1 by utilizing the kinetic energy of the water body, so that the silt is kept to move to a silt deposition area 3.1 in the sand guide groove 2.2, on the other hand, the effect of pulling the silt in the water inlet pool 2 is achieved by utilizing the water level difference between the silt deposition area 3.1 and the water inlet pool 2, and the silt in the water inlet pool 2 is conveyed and deposited in the silt deposition area 3.1;
and S5, according to the sediment condition of the sediment in the sediment deposition area 3.1, regularly and intensively cleaning the sediment in the sediment deposition area 3.1 by using a mud pump truck.
Claims (4)
1. A method for cleaning silt in a water inlet pool of a water delivery pump station is characterized by comprising the following steps: the method comprises the following steps:
s1, arranging a sedimentation tank on the opposite side of the water inlet of the water pump station, so that the water inlet and the sedimentation tank are distributed on the two sides of the water inlet of the water pump station, and the water inlet and the sedimentation tank are separated by a water retaining wall; the sedimentation tank is divided into a sediment deposition area and a water diversion transition area, the sediment deposition area is positioned on one side far away from a water pumping port of the water delivery pump station, and the elevation of a bottom plate of the sediment deposition area is lower than that of the bottom plate of the water diversion transition area and that of a bottom plate of the water inlet tank;
s2, at least three sand guide grooves are arranged on the bottom plate of the water inlet pool, extend from the water inlet of the water inlet pool to the position of the water retaining wall in the sediment deposition area, and are communicated with the sediment deposition area through flow guide holes arranged at corresponding positions on the water retaining wall;
s3, arranging a bypass water conduit in the water diversion transition area, wherein the bypass water conduit is communicated with a water pumping pipe of a water delivery pump station through an electric valve;
s4, when the water pumping pipe of the water delivery pump station normally pumps water, the opening of the electric valve of the bypass water conduit is adjusted, and through the combined action of the diversion hole and the sand guide groove which are arranged on the water retaining wall, a water head is formed in the water inlet pool and the sediment deposition area, so that an effective overflow channel from the water inlet to the sediment deposition area is formed in the water inlet pool, on one hand, sediment brought by the water inlet of the water inlet pool is pushed into the sand guide groove at the water inlet by using the kinetic energy of the water body, the sediment is kept to move to the sediment deposition area in the sand guide groove, on the other hand, the sand pulling effect on the sediment in the water inlet pool is achieved by using the water head between the sediment deposition area and the water inlet pool, and the sediment in the water inlet pool is conveyed and deposited in the sediment deposition area;
and S5, according to the sediment situation of the sediment in the sediment deposition area, regularly and intensively cleaning the sediment in the sediment deposition area by using a mud pump truck.
2. The method for cleaning silt in the water inlet tank of the water delivery pump station as claimed in claim 1, wherein the method comprises the following steps: the bottom plate of the sediment deposition area is a horizontal plane, the bottom plate of the water diversion transition area is an inclined plane which is inclined downwards towards the sediment deposition area, and the gradient is 5-7% so as to be beneficial to keeping sediment in the sediment deposition area; the setting principle of the elevation difference that the elevation of the bottom plate of the sediment deposition area is lower than that of the bottom plate of the diversion transition area is as follows: the capacity of sediment deposition in one week of the water transfer pump station is met.
3. The method for cleaning silt in the water inlet pool of the water delivery pump station as claimed in claim 1 or 2, wherein the method comprises the following steps: the sand guide groove is an arc-shaped groove, and the flow guide holes formed in the water retaining wall are square flow guide holes.
4. The method for cleaning silt in the water inlet pool of the water delivery pump station as claimed in claim 1 or 2, wherein the method comprises the following steps: the bottom plate of the water inlet pool is an inclined plane which is inclined downwards towards the sedimentation pool, and the gradient is 2-3%.
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| CN202110148952.8A CN112814078B (en) | 2021-02-03 | 2021-02-03 | Method for cleaning silt in water inlet pool of water transfer pump station |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1046557A (en) * | 1996-07-31 | 1998-02-17 | Hazama Gumi Ltd | Water-intake structure |
| CN101187206A (en) * | 2007-12-25 | 2008-05-28 | 中国水电顾问集团中南勘测设计研究院 | Hydropowerstation water inlet sand-discharging facility |
| CN106522153A (en) * | 2016-12-20 | 2017-03-22 | 河南省水利勘测设计研究有限公司 | Energy-gathering rotary accelerating silt removal method for long-distance standard-section artesian ditch |
| CN106869245A (en) * | 2017-02-27 | 2017-06-20 | 四川大学 | Suitable for Mountain Area high water level change fully-loaded stream can submerged lift pumping station |
| CN108625430A (en) * | 2018-05-16 | 2018-10-09 | 华北水利水电大学 | The Yellow River lift pumping station sand flushing system |
| CN110409389A (en) * | 2019-08-13 | 2019-11-05 | 中国电建集团北京勘测设计研究院有限公司 | A kind of simultaneous collection sand flushing system of multichannel water intaking |
| CN210645245U (en) * | 2019-06-03 | 2020-06-02 | 中国葛洲坝集团勘测设计有限公司 | Flushable sand settling system |
-
2021
- 2021-02-03 CN CN202110148952.8A patent/CN112814078B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1046557A (en) * | 1996-07-31 | 1998-02-17 | Hazama Gumi Ltd | Water-intake structure |
| CN101187206A (en) * | 2007-12-25 | 2008-05-28 | 中国水电顾问集团中南勘测设计研究院 | Hydropowerstation water inlet sand-discharging facility |
| CN106522153A (en) * | 2016-12-20 | 2017-03-22 | 河南省水利勘测设计研究有限公司 | Energy-gathering rotary accelerating silt removal method for long-distance standard-section artesian ditch |
| CN106869245A (en) * | 2017-02-27 | 2017-06-20 | 四川大学 | Suitable for Mountain Area high water level change fully-loaded stream can submerged lift pumping station |
| CN108625430A (en) * | 2018-05-16 | 2018-10-09 | 华北水利水电大学 | The Yellow River lift pumping station sand flushing system |
| CN210645245U (en) * | 2019-06-03 | 2020-06-02 | 中国葛洲坝集团勘测设计有限公司 | Flushable sand settling system |
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Non-Patent Citations (1)
| Title |
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| 泵站圆形进水池进水流态及水泵性能研究;冯建刚等;《排灌机械》;20031130(第05期);第8-10页 * |
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