CN206224474U - Power plant's open diversion canal water conservancy diversion heat-proof device - Google Patents
Power plant's open diversion canal water conservancy diversion heat-proof device Download PDFInfo
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- CN206224474U CN206224474U CN201620923721.4U CN201620923721U CN206224474U CN 206224474 U CN206224474 U CN 206224474U CN 201620923721 U CN201620923721 U CN 201620923721U CN 206224474 U CN206224474 U CN 206224474U
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Abstract
The utility model discloses a kind of power plant's open diversion canal water conservancy diversion heat-proof device, including folded plate type deflector and plate deflector, folded plate type deflector includes the first hang plate and the first flat board, first hang plate one end is arranged on open channel porch, the other end is connected with the first flat board, and the first hang plate and the first flat board side are each attached on the side wall of open diversion canal；Plate deflector is arranged on open channel outlet and water inlet rectification box junction, including the second flat board, and the side of the second flat board is fixed on the side wall of open diversion canal.The utility model can effectively reduce the temperature rise that solar radiation in open diversion canal course of conveying brings on water body to be influenceed, and reduces power plant cooling water water intaking temperature, the efficiency of generating set is improved, with economic benefit and application and popularization value very high.
Description
Technical field
The utility model is related to power plant's direct-flow water supply system research field, more particularly to a kind of power plant's open diversion canal water conservancy diversion every
Thermal.
Background technology
Fire, the main of nuclear power plant are main steam turbine condenser and subsidiary engine cooling water with water, and it is complete that its water consumption accounts for power plant
More than the 90% of station-service water.This water consumption is very big, such as one condenser and subsidiary engine of the conventional fired power generating unit of 1000MW
Cooling water inflow about 25~30m3/s.If 4 units are installed by power plant, the water withdrawal from water source is up to 100~120m3/s；One
The turbine condenser and subsidiary engine cooling water of the CPR1000 nuclear power generating sets of 1000MW, the water consumption about 50 of nuclear island essential service water
~60m3/s.If 4 homotype units are installed by nuclear power plant, total water withdrawal will be up to 200~240m3/s.Meet so substantial amounts of taking
Water consumption, the water that must have abundance as the surface water body at water source is available for taking, and water quality and water temperature must also are fulfilled for using water
It is required that.
The construction experiences of current thermal power plant show, if power plant is located near the surface water bodies such as river, river, lake, sea, have preferably
Take, the surface water of drainage condition and abundance is available for taking, the water quality of water body, water temperature are satisfied by during with water requirement, using once
The direct-flow water supply system of boosting is both economical, and water flows back to natural water body again through power plant after, flows back to the water water removal of natural water body
Outside temperature rise, do not polluted by other.
Direct-flow water supply system is the condenser type of cooling generally used in border on the sea power plant, using the electricity of direct-flow water supply system
Factory, when the range of stage at water source is small, water level is with plant area absolute altitude when differing less, and water is generally guided to plant area using open diversion canal,
Every correspondence position of unit sets pump works and is supplied water to every machine respectively before main building.Open diversion canal scheme is hindered with its waterpower
The advantage that power is small, initial cost is saved, operating cost is low, has obtained application widely in border on the sea power plant.Such open diversion canal
Cemented rock or placed rockfill structure are generally used, slope coefficient m uses 1.0~1.5, and base slope takes certain slope or using flat
Slope.
Its water supply flow is generally：Intake (box culvert) → open diversion canal → water inlet rectification box → forebay → circulation
Pump house → circulating water pressure main pipe → condenser → siphonic water-collecting well → recirculated water drainage channel → surface water channel and discharge outlet.
To get the low-temperature cooling water of marine site deep layer, water intaking form is drawn generally by the way of box culvert down-the-hole takes deeply
Water open channel needs to extend to marine site remote position, and it is left that the length according to engineering experience open diversion canal is usually 1000m~2000m
It is right.In subtropical zone, summer temperature on average is higher, and the temperature rise using Three-dimensional Hydrodynamic simulation softward to open channel carries out three
Dimensional Simulation of Air Motion, it is possible to find under solar radiation, water temperature is presented obvious lamination to open channel, surface temperature is higher and bottom
Layer temperature is relatively low, and the water at low temperature that diversion box culvert is got will carry out blending with high-temperature water in flow process, cause bottom circulating water
Temperature rise, if directly cooled down using the water in open diversion canal, it will influence power plant cooling water water temperature, eventually affects generating
The efficiency of unit.
With the data instance of certain million fired power generating unit field data of having gone into operation in Guangdong Province, to Three-dimensional simulation software
In heat transfer model parameter be corrected after, counted for the annual recirculated water temperature rise month by month of each engineering of the South China coastal
Calculate, draw water at low temperature by after solar radiation, each moon water temperature temperature rise value of open diversion canal end water circulating pump import is at 0.10 DEG C
~0.50 DEG C or so.The water temperature that cooling water causes in open diversion canal after solar radiation is raised, and will directly influence generator
The design power of group, by taking the supporting open diversion canal of the thermal power generation unit of 4 1000MW ultra supercriticals as an example, the temperature rise will be led
The operation back pressure increase about 0.03~0.13kPa (being varied from according to each month temperature difference) of Turbo-generator Set is caused, so that
Exerting oneself for generating set will reduce about 0.02%~0.08%, i.e., actual year generated output reduces by 4,400,000~35,200,000 kW.h,
If by the unit price consideration of 0.62 yuan/kW.h of rate for incorporation into the power network, if using the sun in open diversion canal scheme consideration cooling water course of conveying
Radiation-induced water temperature is raised, and about 283~21,820,000 yuan of economic benefit will be lost every year.
Therefore, how research ensures that the cooling water that open diversion canal is quoted will not be influenceed by solar radiation, further improves
The generated output in power plant, with important Research Significance.
Utility model content
The purpose of this utility model is the shortcoming and deficiency for overcoming prior art, there is provided a kind of power plant's open diversion canal water conservancy diversion
Heat-proof device, the device is bright to diversion to reduce solar radiation by being respectively provided with before and after open diversion canal a water conservancy diversion thermal insulation board
The influence of water temperature in canal, avoids cooling water from heating up as far as possible.
The purpose of this utility model is realized by following technical scheme：Power plant's open diversion canal water conservancy diversion heat-proof device, including
Folded plate type deflector and plate deflector, the folded plate type deflector include the first hang plate and the first flat board, and first inclines
Plate one end is arranged on open channel porch, and the other end is connected with the first flat board, and first hang plate and the first flat board side are solid
It is scheduled on the side wall of open diversion canal；The plate deflector is arranged on open channel outlet and water inlet rectification box junction, including
Second flat board, the side of the second flat board is fixed on the side wall of open diversion canal.
Preferably, the angle of inclination β of first hang plate≤(180- α)+arctan (i), wherein α represents open diversion canal
Base slope turning angle, i represents open diversion canal hydraulic slope, and unit is h/m.
Preferably, the height H2 of the first flat board upper surface≤97%* open diversion canals design low tide highly.By Numerical-Mode
Intend, highly can at utmost avoid the water at low temperature that diversion box culvert is got to be mixed in flow process with high-temperature water using this
Mix.
Preferably, the second flat board edge flows to length E≤rectification box overall width+2.0m.
Preferably, top mark+1.0m high in the height H≤rectification box of the second flat board upper surface.
Specifically, the width of the second flat board=open channel bottom width+(deflector absolute altitude-open channel bottom absolute altitude) × tan- 1(θ), its
Middle θ is angle between deflector and open channel mask.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, the utility model is provided with folded plate type deflector in the porch of open diversion canal, so that open channel porch open channel
Top layer and the layering of bottom fluidised form are obvious, and top layer water delivery flow velocity is small, and bottom water flow velocity is big, forms " undercurrent " fluidised form, and table is reduced as far as possible
Layer carries out blending with bottom water in flow process.
2nd, the utility model is exported in open channel and is provided with plate deflector with water inlet rectification box junction, so as to ensure
Circulating pump room water inlet rectification box can get bottom water, it is to avoid get top layer high-temperature water, therefore can ensure power plant cooling water water
Temperature is not influenceed by solar radiation, improves the efficiency of generating set.
3rd, each key design parameter of folded plate type deflector and plate deflector passes through three-dimensional in the utility model
Fluid calculation software is modeled, and is then obtained by numerical simulation, can obtain corresponding parameter based on different structures, calculates
Accurately, it is easy to promote.
4th, compared to traditional open diversion canal system, the utility model is by setting power plant's heat-insulated dress of open diversion canal water conservancy diversion
Put, can effectively reduce the temperature rise that solar radiation in open diversion canal course of conveying brings on water body influences, and calculates the final electricity of display
Factory's cooling water water intaking temperature reduces about 0.08 DEG C~0.30 DEG C (month by month), so as to reduce the operation back of the body of Turbo-generator Set
Pressure, increased the year generated output of generating set, with the open diversion canal that the thermal power generation unit of 4 1000MW ultra supercriticals is supporting
As a example by, the initial outlay of water conservancy diversion thermal insulation board is about 2,000,000 yuan, and the economic benefit brought every year is about 6,000,000 yuan, economic benefit
Highly significant.
Brief description of the drawings
The overall structure diagram of Tu1Shi the present embodiment power plant open diversion canal water conservancy diversion heat-proof device.
Fig. 2 is the overlooking the structure diagram of the present embodiment folded plate type air deflector.
Fig. 3 is A-A cross-section structure principle schematics in Fig. 2.
Fig. 4 (a) is the overlooking the structure diagram of the plate air deflector of the present embodiment.
Fig. 4 (b) is C-C cross-section structure principle schematics in Fig. 4 (a).
Specific embodiment
The utility model is described in further detail with reference to embodiment and accompanying drawing, but implementation of the present utility model
Mode not limited to this.
Embodiment 1
The present embodiment is by obtaining the design parameter of current open diversion canal, including base slope turning angle, design low tide are high
Degree, open diversion canal transverse parameters, open diversion canal hydraulic slope；Obtain the design parameter of current rectification box, including width, interior top
Absolute altitude；Obtain current waters parameter, the solar radiation temperature rise value in such as unit length waters；Using hydrodynamics software through excessive
The optimization of amount calculates the concrete structure for proposing power plant's open diversion canal water conservancy diversion heat-proof device described in the present embodiment.The present embodiment water conservancy diversion
Thermal insulation board is intake by being arranged on the folded plate type deflector of open channel entrance (after diversion box culvert variable slope segment) and being arranged on circulating pump room
Rectification box upper limb, the plate deflector in open channel exit are combined.Below in conjunction with the accompanying drawings, two structures are carried out specifically
Explanation.
Referring to Fig. 2, Fig. 3, the present embodiment folded plate type deflector includes the first hang plate and the first flat board, the first hang plate one
End is arranged on open channel porch, and the other end is connected with the first flat board, and first hang plate and the first flat board side are each attached to
On the side wall of open diversion canal.
A, B, C, α, β, H1, H2 are the main technologic parameters of water conservancy diversion thermal insulation board in figure.Each key parameter basis for selecting：
1st, the height H2 of the first flat board upper surface≤97%* open diversion canals design low tide highly.
2nd, the angle of inclination β of the first hang plate≤(180- α)+arctan (i), wherein α represent that open diversion canal base slope is transferred
Angle, i represents open diversion canal hydraulic slope, and unit is h/m.
3rd, the length A of the width C of the first hang plate and the first flat board, the length B of the first hang plate and the first flat board, three
By the open channel fluidised form three dimensional fluid mechanics optimization method based on CFD software or the open channel temperature rise based on DHI MIKE3 softwares
Field Three-dimensional Numerical Simulation Method optimization is calculated and determined.
4th, structural mechanics calculating method of the thickness of the first hang plate and the first flat board based on ANSYS FLUENT softwares is obtained.
Referring to Fig. 4 (a), Fig. 4 (b), the plate deflector of the present embodiment includes the second flat board, and the side of the second flat board is fixed
On the side wall of open diversion canal.
E, H, F are the main technologic parameters of water conservancy diversion thermal insulation board in figure.Each key parameter basis for selecting：
1st, the second flat board edge flows to length E≤rectification box overall width+2.0m.
2nd, top mark+1.0m high in the height H≤rectification box of the second flat board upper surface.
3rd, the width (namely flowing vertically to width) of the second flat board determines according to open diversion canal cross section characteristic.It is specific to calculate
Method is：The width of the second flat board=open channel bottom width+(deflector absolute altitude-open channel bottom absolute altitude) × tan- 1(θ), wherein θ are to lead
Angle between stream plate and open channel mask.
After folded plate type deflector and plate deflector is set, open channel top layer and the layering of bottom fluidised form are obvious, and top layer is defeated
Water flow velocity is small, and bottom water flow velocity is big, forms " undercurrent " fluidised form.After open channel forms undercurrent, 80% comes from bottom water at low temperature with undercurrent
Form is conveyed, and only 20% bottom water at low temperature is conveyed with top layer.
Above-described embodiment is the utility model preferably implementation method, but implementation method of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from the change made under Spirit Essence of the present utility model and principle, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, be included within protection domain of the present utility model.
Claims (6)
1. power plant's open diversion canal water conservancy diversion heat-proof device, it is characterised in that described including folded plate type deflector and plate deflector
Folded plate type deflector includes the first hang plate and the first flat board, and first hang plate one end is arranged on open channel porch, the other end with
First flat board is connected, and first hang plate and the first flat board side are each attached on the side wall of open diversion canal；It is described plate
Deflector is arranged on open channel outlet and water inlet rectification box junction, including the second flat board, and the side of the second flat board is fixed on draws
On the side wall of water open channel.
2. power plant's open diversion canal water conservancy diversion heat-proof device according to claim 1, it is characterised in that first hang plate
Angle of inclination β≤(180- α)+arctan (i), wherein α represent open diversion canal base slope turning angle, and i represents open diversion canal waterpower
Gradient, unit is h/m.
3. power plant's open diversion canal water conservancy diversion heat-proof device according to claim 1, it is characterised in that the first flat board upper surface
Height H2≤97%* open diversion canals design low tide is highly.
4. power plant's open diversion canal water conservancy diversion heat-proof device according to claim 1, it is characterised in that second flat board is along stream
To length E≤rectification box overall width+2.0m.
5. power plant's open diversion canal water conservancy diversion heat-proof device according to claim 1, it is characterised in that the second flat board upper table
Top mark+1.0m high in the height H≤rectification box in face.
6. power plant's open diversion canal water conservancy diversion heat-proof device according to claim 1, it is characterised in that the width of the second flat board=
Open channel bottom width+(deflector absolute altitude-open channel bottom absolute altitude) × tan- 1(θ), wherein θ are angle between deflector and open channel mask.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923721.4U CN206224474U (en) | 2016-08-23 | 2016-08-23 | Power plant's open diversion canal water conservancy diversion heat-proof device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923721.4U CN206224474U (en) | 2016-08-23 | 2016-08-23 | Power plant's open diversion canal water conservancy diversion heat-proof device |
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| CN206224474U true CN206224474U (en) | 2017-06-06 |
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| CN201620923721.4U Active CN206224474U (en) | 2016-08-23 | 2016-08-23 | Power plant's open diversion canal water conservancy diversion heat-proof device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227980A (en) * | 2016-08-23 | 2016-12-14 | 中国能源建设集团广东省电力设计研究院有限公司 | Power plant's open diversion canal water conservancy diversion heat ray filter and method for designing thereof |
-
2016
- 2016-08-23 CN CN201620923721.4U patent/CN206224474U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227980A (en) * | 2016-08-23 | 2016-12-14 | 中国能源建设集团广东省电力设计研究院有限公司 | Power plant's open diversion canal water conservancy diversion heat ray filter and method for designing thereof |
| CN106227980B (en) * | 2016-08-23 | 2023-06-23 | 中国能源建设集团广东省电力设计研究院有限公司 | Diversion and heat insulation device for diversion open channel of power plant and design method thereof |
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