CN106644384A - Conveying experiment system with circulating water trough-experiment soil cup over-scale coupling for pollutant between overlaying water and bed - Google Patents
Conveying experiment system with circulating water trough-experiment soil cup over-scale coupling for pollutant between overlaying water and bed Download PDFInfo
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- CN106644384A CN106644384A CN201611235649.7A CN201611235649A CN106644384A CN 106644384 A CN106644384 A CN 106644384A CN 201611235649 A CN201611235649 A CN 201611235649A CN 106644384 A CN106644384 A CN 106644384A
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- water
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
The invention discloses a conveying experiment system with circulating water trough-experiment soil cup over-scale coupling for pollutant between overlaying water and bed. The conveying experiment system comprises the circulating water trough which is internally provided a bed-overlaying water exchange area. The bed surface of the circulating water trough at bottom of the bed is provided with a soil outlet opening which is connected with a soil cup. The opening part of the soil cup is level with the bed surface of the circulating water trough. The bed and the overlaying water are communicated with the soil cup. Static experiment equipment is coupled with a circulating water trough system. A water power condition which is similar with surface water and overlaying water is supplied. Furthermore the conveying experiment system has advantages of realizing convenient control for bed parameters, reducing sand for a bed experiment, and improving economical efficiency and feasibility of the experiment.
Description
Technical field
The present invention relates to Pollutant Transportation experimental system between a kind of bed material, more particularly to a kind of circulating water chennel-experiment soil cup
Pollutant Transportation experimental system between the overlying water-bed material of trans-scale coupling.
Background technology
Surface water eutrophication problem is the main ecological nuclear sterile barley of Present Global, the main lake such as Chinese Taihu Lake, Dian Chi
There is eutrophication problem in pool majority.Endogenous pollution serves decisive role, European substantial amounts of lake treatment table in eutrophy
It is bright, even if under the conditions of external source is all cut off, endogenous pollution also can still be present.Different researchers propose a large amount of measures and administer endogenous
Pollution, but not yet obtain satisfied effect.The seriousness of endogenous pollution so that can current problem be no longer " administer ", but
It is changed into the problem of " when " or " what degree " under the conditions of cut-out external source.In this problem is answered, bed material and overlying water bed
Face flux and bed material contaminant transportation law study have decisive significance.
Experimental study is the main path for solving bed material-overlying water system interface Pollutant Transportation, and main method can be divided into
Static test and dynamic test.
Prior art one：
Though static experiment claims " static state ", water body is not at inactive state, often keeps under the effect such as stirring and concussion
Silt suspended state.Experiment is mainly used in studying the Adsorption and desorption characteristics after silt suspends, such as different factor (particle diameter, temperature, acid
Degree) impact to adsorption-desorption.Also there is experiment to study bed material characteristic, such as describe specific section bed material adsorption-desorption special
Property；The rate of adsorption and equilibrium adsorption concentration of comparative analysis difference section silt；The different factors of research are special to bed material adsorption-desorption
The Influencing Mechanism of property.But, defect of the static experiment in river bed material characteristic research has long been recognized, and such as Huang Suiliang points out quiet
State experimental technique " give no thought to the hydraulic characteristic(s) of natural river, this for natural river hydraulics vary, no
Can not say it is one big not enough ".
The shortcoming of prior art one：
During static experiment application of result, there is problems with, first, the approximate constant and nothing of solution in container in static experiment
Method considers different silt differences, commonly uses adsorption isotherm correspondence its equilibrium condition, and actually natural bed material species flux itself
It is the product under non-equilibrium condition, is a non-constant, non-homogeneous process；Secondly, static experiment changes completely the water of silt
Husky dynamic characteristics, it is impossible to ensure the controllability of the experiment parameters such as flow velocity, pollutant levels.As simultaneously Huang is simply stirred
Mix experiment and improved turbulent flow simulation cup carried out adsorption and desorption experiment, as a result find adsorption equilibrium time be respectively 2h and
20min, demonstrates again that the hydro-sediment dynamics of stirring test are entirely different with the hydro-sediment dynamics of surface water.
Prior art two：
The dynamic water experiment of circulating water chennel can realize experimental section hydro-sediment dynamics and upstream to flow the controllability of flow and sediment, tail water
Flow through water pump and be delivered to tank upstream again, recycle.Increase equipment outside experimental section, to control the husky concentration of water and chemical bar
Part.The sediment dynamics such as the water system of circulating water chennel, tail-gate control control relative maturity.Bed material-overlying water pollutant is handed over
In changing research, bed material is approximately full of whole river course, and base this simulation bed material transport process bed surface-overlying water pollutant is exchanged.
The shortcoming of prior art two：
But, there are the following problems for existing method：
1) whole river course is full of bed material, and bed material has moving movement and Scour and Accretion under flow action.Bed morphology makes
Obtain top layer silt to change, it is impossible to study the exchange process of vertical different depth silt and overlying water.
2) pollutant exchanges related to silt physical characteristic and chemical characteristic in overlying water-bed material, and process of the test often needs
Control silt physical characteristic (such as particle diameter) and chemisorptive properties (such as top layer exchangeable species), river course test need to adopt natural river
Sand, if whole river course is measured very greatly, such as 10m length, 0.3m width as bed material test block with husky, bed material thickness is 0.15m, then
Once experiment needs husky amount 0.45m3.And silt cannot be reused after adsorption-desorption test.Test silt needs to take from river
Sand, experimental scale is excessive, high cost, and testing expenses or work measuring angle all can be difficult to meet.
If 3) riverbed can only be done every time into the silt sample of one group of specific physicochemical properties as one entirety.
The content of the invention
It is an object of the invention to provide a kind of convenient control bed material parameter, economic, feasible circulating water chennel-experiment soil cup
Pollutant Transportation experimental system between the overlying water-bed material of trans-scale coupling.
The purpose of the present invention is achieved through the following technical solutions：
Pollutant Transportation experiment system between the overlying water-bed material of the circulating water chennel of the present invention-experiment soil cup trans-scale coupling
System, including circulating water chennel, are provided with bed material-overlying water pollutant exchange area, in the recirculated water of bed material bottom in the circulating water chennel
Native cup interface is reserved on the bed surface of groove and connects native cup, the native rim of a cup portion flushes with the bed surface of the circulating water chennel, bed material and
Overlying water is connected with the native cup.
As seen from the above technical solution provided by the invention, circulating water chennel provided in an embodiment of the present invention-experiment soil
Pollutant Transportation experimental system between the overlying water-bed material of cup trans-scale coupling, coupling static test equipment and circulating water chennel system
System, there is provided the similar hydrodynamic condition of surface water overlying water, while convenient control bed material parameter, reduces bed material test sand, increases
Plus the economical and feasibility of test.
Description of the drawings
Fig. 1 is the side structure schematic diagram of experimental trough system in the embodiment of the present invention.
Fig. 2 is the planar structure schematic diagram of experimental trough system in the embodiment of the present invention.
Fig. 3 is that (for square, the right can be direct on the left side for the native cup interface of bed material-overlying water interface area in the embodiment of the present invention
Place beaker) arrangement schematic diagram.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on this
Inventive embodiment, the every other enforcement that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
Pollutant Transportation experiment system between the overlying water-bed material of the circulating water chennel of the present invention-experiment soil cup trans-scale coupling
Unite, its preferably specific embodiment is：
Including circulating water chennel, bed material-overlying water pollutant exchange area is provided with the circulating water chennel, in bed material bottom
Native cup interface is reserved on the bed surface of circulating water chennel and connects native cup, the native rim of a cup portion flushes with the bed surface of the circulating water chennel,
Bed material and overlying water are connected with the native cup.
The cross section of the native cup is circular or square.
The circulating water chennel is connected with pump pond, upper storage reservoir, regulating reservoir and two and supplies water vat, the pump pond to be connected with regulating reservoir,
Main pump is provided between the pump pond and the water inlet of circulating water chennel stem, between described two confession water vats and regulating reservoir moisturizing is provided with
Pump, the delivery port of the circulating water chennel afterbody is connected with two for water vat；
The main pump and small pump are respectively equipped with flowmeter, and the water inlet position of the circulating water chennel is provided with ball current stabilization
Device, the delivery port of the circulating water chennel afterbody is provided with water-level regulator.
The circulating water chennel provides natural river similar hydrodynamic condition, and the native cup then provides similar in the confined space
Natural bed material condition, the simulation natural river bed surface flux and vertical Pollutant Transportation rule of bed material realizes static beaker examination
Test the joint advantage with circulating water chennel.
Pollutant Transportation experiment system between the overlying water-bed material of the circulating water chennel of the present invention-experiment soil cup trans-scale coupling
System, in solving prior art, static test small scale, it is only necessary to complete in a beaker, but cannot simulate on river and swim
Hydrodynamic condition；And circulating water chennel is sufficiently large, the testing expenses too too small problem of big, test efficiency.
Pollutant Transportation experiment system between the overlying water-bed material of the circulating water chennel of the present invention-experiment soil cup trans-scale coupling
System, coupling static test equipment and circulating water chennel system, there is provided the similar hydrodynamic condition of surface water overlying water, while convenient control
Bed material parameter processed, reduces bed material test sand, increases the economical and feasibility of test.
1) it is hydrodynamic similitude and Controllability firstly the need of what is solved.Hydrodynamics control is mainly water supply flow
Stable, fluid stable, tail water lever control, stream gradient control.
2) next to that reducing the uncertain influence factor of bed material test, reduce bed material top layer silt moving movement, level and
It is vertical without sediment bypassing, to study vertical defeated shifting of the pollutant in bed material.
3) bed surface top layer provides test interface in the present invention, and bottom can connect the native cup of bed material test, and native cup is flushed with bed surface,
And ensure to be connected with overlying water.Different soil cups can fill different qualities silt, and overlying water-bed material flux is only carried out in native cup
It is vertical with pollutant to transport experimental study.Not only meet the similitude of overlying water current, and experiment is reduced into big static examination with husky
That what is tested uses husky magnitude.
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing.
Specific embodiment：
Experimental trough system place laboratory arranges bench for chemistry experiment and experiments supporting instrument simultaneously.Experimental trough system sets
Meter is as shown in Figure 1 and Figure 2.Recirculated water flute length L=12.00m, wide B=0.30m, supertronic scope 0～1.5%.Maximum water depth 0.15m
(breadth depth ratio 2), Peak Flow Rate 1.00m.Flow velocity is 0.40m/s during maximum water depth；Depth of water 0.06m during Peak Flow Rate.
Dynamical system is intended increasing regulating reservoir and small pump.Supplied water to regulating reservoir for water vat rotation from two from small pump, protected
Hold regulation pool water level it is constant, main pump supplies water from pump pond to tank；Flowmeter is provided between double pump, by testing pump uninterrupted；
Tank entrance location sets up ball flow straightener, it is ensured that tank fluidised form is stablized；Tank afterbody delivery port is provided with water-level regulator, can
To adjust water level.Tail water is flowed back into and supplies water vat.By for the alternative water-supply of water vat 1 and 2.
As shown in figure 3, bed material-overlying water test interface area provides bed material test interface, and (left side is square, and the right can be direct
Place beaker), bed surface bottom provides square test soil cup.Native cup top and bed surface level, when water body flows through bed surface, native cup bed material
Can exchange with overlying water.By regulating and controlling flow rate of water flow, water level, become soil removal and replacement cup silt physical and chemical condition, the different bars of research
Exchange rule of the pollutant between bed material-overlying water under part.Native cup depth is 15～25cm effects.
The beneficial effect that technical solution of the present invention is brought：
With after the soil cup coupling of parallel lateral spacing, tank is to provide river course similar flow condition to circulating water chennel, lateral spacing soil cup mould
Bed material pollutant is vertical under plan river bed material, and then the different bed material structures of research, different flow conditions transports and bed surface flux.Examination
Only need for sand to fill with lateral spacing soil cup when testing.
1st, lateral spacing soil cup reduces the vertical transport and bed material erosion and deposition of bed material, reduces vertical transport presence one and does not know
Factor, can preferably reflect that bed surface vertical flux and pollutant are transported in the vertical of bed material；
2nd, testing expenses are reduced.The experiment husky amount of husky amount and common beaker, greatly reduces and is measured with husky, and reduction is tested into
This, increased the realizability of model；
3rd, test efficiency is improved, reduces workload.In tank floating water running, multigroup parallel soil can be simultaneously placed
Cup, tests heterogeneity (such as different-grain diameter or composition) silt, and carries out parallel test, improves test efficiency, drops
Low experiment work amount.
Above-mentioned bed material soil cup is designed as square, but it is also possible to is substituted using circular or other shapes soil cup, simply needs water
Troughstand face provides corresponding interface, makes different shape contain sandy soil cup surface and flushes with tank bed surface, vertical connects and bottom is not leaked
Water.
The present invention key technology be：
The use in conjunction of circulating water chennel and test bed sandy soil cup, in bed material bottom native cup interface is reserved.Native rim of a cup portion and water
Troughstand face flushes, and overlying water is connected with native cup.Tank can provide natural river similar hydrodynamic condition, and native cup is then limited
Space provides similar natural bed material condition, simulation natural river bed surface flux and the vertical Pollutant Transportation rule of bed material.Realize
The joint advantage of dynamic test and circulating water chennel.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (4)
1. Pollutant Transportation experimental system between a kind of overlying water-bed material of circulating water chennel-experiment soil cup trans-scale coupling, it is special
Levy and be, including circulating water chennel, bed material-overlying water pollutant exchange area is provided with the circulating water chennel, in following for bed material bottom
Native cup interface is reserved on the bed surface of ring tank and connects native cup, the native rim of a cup portion flushes with the bed surface of the circulating water chennel, bed
Husky and overlying water is connected with the native cup.
2. pollutant is defeated between the overlying water-bed material of circulating water chennel according to claim 1-experiment soil cup trans-scale coupling
Fortune experimental system, it is characterised in that the cross section of the native cup is circular or square.
3. pollutant is defeated between the overlying water-bed material of circulating water chennel according to claim 1-experiment soil cup trans-scale coupling
Fortune experimental system, it is characterised in that the circulating water chennel is connected with pump pond, upper storage reservoir, regulating reservoir and two and supplies water vat, the pump pond
It is connected with regulating reservoir, main pump, described two confession water vats and regulation is provided between the pump pond and the water inlet of circulating water chennel stem
Small pump is provided between pond, the delivery port of the circulating water chennel afterbody is connected with two for water vat；
The main pump and small pump are respectively equipped with flowmeter, and the water inlet position of the circulating water chennel is provided with ball flow straightener, institute
The delivery port for stating circulating water chennel afterbody is provided with water-level regulator.
4. dirty between the overlying water-bed material of the circulating water chennel according to claim 1,2 or 3-experiment soil cup trans-scale coupling
Dye thing transports experimental system, it is characterised in that the circulating water chennel provides natural river similar hydrodynamic condition, the native cup
Then provide similar natural bed material condition, simulation natural river bed surface flux and the vertical Pollutant Transportation rule of bed material in the confined space
Rule, realizes the joint advantage of dynamic test and circulating water chennel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611235649.7A CN106644384B (en) | 2016-12-28 | 2016-12-28 | Cross-scale coupling type overlying water-bed sand pollutant transport experiment system with circulating water tank and experimental soil cup |
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|---|---|---|---|
| CN201611235649.7A CN106644384B (en) | 2016-12-28 | 2016-12-28 | Cross-scale coupling type overlying water-bed sand pollutant transport experiment system with circulating water tank and experimental soil cup |
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| CN106644384B CN106644384B (en) | 2023-10-10 |
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| CN108572056A (en) * | 2018-06-28 | 2018-09-25 | 天津大学 | One kind is for the husky mutually feedback experimental monitoring system and method for complex condition river and lake water |
| CN108982595A (en) * | 2018-05-03 | 2018-12-11 | 河海大学 | Simulate field high density pollution object undercurrent exchange in-situ test device and test method |
| CN109827874A (en) * | 2019-01-23 | 2019-05-31 | 河海大学 | A kind of defeated shifting experimental provision of water sand interface pollution object and its implementation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108053736A (en) * | 2017-11-15 | 2018-05-18 | 浙江海洋大学 | A kind of marine structure Research on hydrodynamic experimental provision |
| CN108982595A (en) * | 2018-05-03 | 2018-12-11 | 河海大学 | Simulate field high density pollution object undercurrent exchange in-situ test device and test method |
| CN108572056A (en) * | 2018-06-28 | 2018-09-25 | 天津大学 | One kind is for the husky mutually feedback experimental monitoring system and method for complex condition river and lake water |
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| CN109827874A (en) * | 2019-01-23 | 2019-05-31 | 河海大学 | A kind of defeated shifting experimental provision of water sand interface pollution object and its implementation method |
| CN109827874B (en) * | 2019-01-23 | 2021-07-09 | 河海大学 | Water-sand interface pollutant transport experimental device and implementation method thereof |
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