CN220019584U - Multilayer leaching experimental device - Google Patents
Multilayer leaching experimental device Download PDFInfo
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- CN220019584U CN220019584U CN202320999876.6U CN202320999876U CN220019584U CN 220019584 U CN220019584 U CN 220019584U CN 202320999876 U CN202320999876 U CN 202320999876U CN 220019584 U CN220019584 U CN 220019584U
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- 238000002386 leaching Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 238000005070 sampling Methods 0.000 claims abstract description 138
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000011229 interlayer Substances 0.000 claims abstract description 30
- 239000002699 waste material Substances 0.000 claims abstract description 27
- 239000010410 layer Substances 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 17
- 230000004323 axial length Effects 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 9
- 230000002572 peristaltic effect Effects 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 7
- 238000011160 research Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses a multilayer leaching experimental device, which comprises a hollow sampling tube unit, wherein the lower end of the hollow sampling tube unit is provided with a water inlet and a water outlet, and the upper end of the hollow sampling tube unit is provided with a port; the water inlet and outlet is connected with the waste liquid collecting unit or the water storage unit, a rainfall hole is formed in the water storage unit, and the rainfall hole is positioned above the upper port of the sampling tube unit; the side wall of the hollow sampling tube unit is provided with a side wall water outlet, and a sensor is arranged at the side wall water outlet of the hollow sampling tube unit; one side of the hollow sampling tube unit penetrates through the interlayer sampling column, a sampling groove is formed in the interlayer sampling column, and the axial length of the interlayer sampling column is larger than the diameter of the hollow sampling tube unit; the interlayer sampling column is capable of rotating and moving radially along the hollow sampling tube unit. The device disclosed by the utility model can acquire solid or liquid samples between different layers in real time for detection, so that interlayer analysis is realized, and the accuracy of test results is ensured.
Description
Technical Field
The utility model belongs to the technical field of leaching tests, and relates to a multi-layer leaching experimental device.
Background
Leaching is an important cause of pollution of soil, ground surface and groundwater caused by precipitation of various pollution elements in tailings. The research means for simulating precipitation leaching to obtain heavy metal precipitation and pollutant migration law is mainly leaching experiments, and is widely applied to precipitation characteristics and process analysis of various heavy metals of various minerals or soil or precipitation or leaching of certain elements as a typical indoor experimental means. Meanwhile, the research on the change between leaching layers, the change of results of different leaching depths and the like has great significance on practical research. However, no more mature scheme is available on the design of the experimental device for leaching experiments at present. On the leaching device, various rainfall conditions cannot be accurately simulated, the simulation of the rainfall conditions is single, the rainfall intensity is difficult to control and adjust, in the leaching test, the dynamic leaching and the static leaching cannot be tested in the same device, a Darcy experimental device is not added in part, the dynamic leaching test and the static leaching test cannot be realized by one device, the research on solid samples is lacking, the real-time sampling cannot be realized, the sampling process is time-consuming and labor-consuming, the working flow is complex, the simulation condition is rough, the observation result is single, and the experimental requirement is difficult to meet.
In the soil leaching experimental device proposed in 2016, the soil leaching experimental device mainly comprises a water supply device, a leaching device and a leaching collecting device, wherein leaching is realized by a leaching nozzle, most of the types of rainfall devices nowadays are suspension line type, nozzle type, spray type and nozzle type, most of the types of the rainfall devices only consider the influence of the intensity of rain, and important factors such as the distribution condition of the rainfall, the kinetic energy rainfall speed of the rainfall, the size of the raindrops of the rainfall and the like are ignored when the actual rainfall is considered. Experiments requiring simulated rainfall conditions cannot be carried out, and the leaching column is only provided with one water outlet, so that deep analysis of multiple layers of different depths cannot be realized. In addition, the implementation device of the device cannot be automated. The experimental process is relatively complex.
Disclosure of Invention
The utility model aims to solve the problems that an experimental device in the prior art cannot finish real-time different interlayer sampling, the rainfall intensity of rainfall is unstable, the rainfall condition is single, the types of samples are single, and only single experimental requirements can be met, and provides a multilayer leaching experimental device.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
the multi-layer leaching experimental device comprises a hollow sampling tube unit, wherein the lower end of the hollow sampling tube unit is provided with a water inlet and a water outlet, and the upper end of the hollow sampling tube unit is provided with a port;
the water inlet and outlet is connected with a waste liquid collecting unit or a water storage unit, a rainfall hole is formed in the water storage unit, and the rainfall hole is positioned above the upper port of the sampling tube unit;
the side wall of the hollow sampling tube unit is provided with a side wall water outlet, and a sensor is arranged at the side wall water outlet of the hollow sampling tube unit;
one side of the hollow sampling tube unit penetrates through an interlayer sampling column, a sampling groove is formed in the interlayer sampling column, and the axial length of the interlayer sampling column is larger than the diameter of the hollow sampling tube unit; the interlayer sampling column is capable of rotating and moving radially along the hollow sampling tube unit.
The utility model further improves that:
the water storage unit comprises a water tank, a water outlet is formed in the water tank, a rainfall cavity is further formed in the bottom of the rainfall cavity, a rainfall cavity water inlet and a rainfall cavity water outlet are formed in the bottom of the rainfall cavity, the water outlet is communicated with the rainfall cavity water inlet, and the rainfall cavity water outlet is communicated with a water inlet and a water outlet at the lower end of the hollow sampling pipe unit;
a peristaltic pump is arranged at the joint of the water outlet and the water inlet of the rainfall cavity;
the rainfall hole is formed in the bottom of the rainfall cavity;
corresponding communication ports are formed in the side walls, connected with the water tank, of the rainfall cavity, and overflow plates are arranged at the communication ports.
The rainfall holes are uniformly arranged, and the interval between every two adjacent rainfall holes is 3cm.
The lower end of the hollow sampling tube unit is provided with a base, a water inlet and a water outlet are formed in the base, an adjusting valve is arranged at the water inlet and the water outlet, and a water permeable filter screen is arranged on the base;
the water inlet and the water outlet are communicated with a rainfall cavity water outlet or a waste liquid collecting unit.
The upper end of the hollow sampling tube unit is provided with an overflow device, the overflow device is communicated with an overflow tube, and the overflow tube is communicated with a sample barrel.
The side wall water outlets are axially arranged at intervals along the side wall of the hollow sampling tube unit, and a filter screen and an adjusting valve are arranged at each side wall water outlet.
The waste liquid collecting unit comprises a waste liquid barrel and a collector;
the water inlet and outlet are connected with the waste liquid branch pipe and the sampling branch pipe, the waste liquid branch pipe is communicated with the waste liquid barrel, and the sampling branch pipe is communicated with the collector.
The interlayer sampling column comprises a middle sampling section and two entity sections at two ends;
the sampling groove is arranged in the sampling section.
The hollow sampling tube unit comprises a plurality of hollow tubes which are connected in sequence in the axial direction.
And in the hollow pipes which are connected in sequence in the axial direction, a silica gel ring is arranged on the connecting end face of each two adjacent hollow pipes.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model discloses a multilayer leaching experimental device, which comprises a hollow sampling tube unit, wherein a port at the upper end of the hollow sampling tube unit and a water inlet and outlet at the lower end of the hollow sampling tube unit can be connected with a water storage unit, the water inlet and outlet at the lower end of the hollow sampling tube unit can also be communicated with the water storage unit, water can be selectively fed from the upper end or the lower end of the hollow sampling tube according to experimental requirements, various experimental requirements are met, a rainfall hole is formed at the lower end of the water storage unit, the size, the number and the distribution compactness of the rainfall hole can be adjusted, meanwhile, a side wall water outlet is formed on the side wall of the hollow sampling tube, the side wall water outlet can be used for collecting water samples between different layers in real time according to experimental requirements for experimental detection, and simultaneously, one side wall water outlet of the hollow sampling tube unit penetrates through an interlayer sampling column, the interlayer sampling column is rotated, a physical sample is collected through the sampling groove, and then the sample is taken away by outwards pulling the sampling column.
Furthermore, in the utility model, the overflow plate is arranged at the communication port between the water tank and the rainfall cavity, the position of the overflow plate is adjusted according to the test requirement, and then the water level height in the rainfall cavity is adjusted, when the water level in the rainfall cavity exceeds the overflow plate and returns to the water tank, the rainfall is simulated by the rainfall air, the constant water level height of the rainfall is ensured by overflow, the constant rainfall pressure is ensured, and the phenomenon of unstable simulated rainfall intensity caused by the peristaltic pump is overcome.
Furthermore, in the utility model, the upper end of the hollow sampling tube unit is provided with the overflow device, the overflow pipe and the sample receiving barrel, and at the moment, the water of the water storage unit enters the hollow sampling tube through the water inlet and outlet at the bottom, so that the Darcy experiment is convenient to carry out, and the variety of the experiment is increased.
Furthermore, in the utility model, the unit comprises a plurality of hollow tubes which are connected in sequence in the axial direction, and the axial length of the hollow sampling tube can be changed by changing the number of the hollow tubes according to test requirements.
Furthermore, in the utility model, the end parts of every two adjacent hollow pipes are provided with the silica gel ring, so that the tightness of the connection between the hollow pipes is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a block diagram of a water tank according to the present utility model;
FIG. 3 is a schematic view of the hollow sampling tube unit connection of the present utility model;
FIG. 4 is a diagram of the structure of the waste liquid tank and collector of the present utility model.
Wherein: 1-a water tank; 2-overflow plate; 3-rainfall holes; 4-peristaltic pump; 5-a rainfall device bracket; 6-pulleys; 7-hollow tubes; 8-a base; 9-a silica gel ring; 10-adjusting a valve; 11-a water permeable filter screen; 12-overflow means; 13-overflow pipe; 14-a sample receiving barrel; 15-a sensor; a 16-data converter; 17-a computer; 18-an interlayer sampling column; 19-waste liquid branch pipes; 20-sampling branch pipes; 21-a waste liquid barrel; 22-collector; 23-water outlet; 24-a rainfall cavity water inlet; 25-a rainfall cavity water outlet; 26-water inlet and outlet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the embodiment of the utility model discloses a multi-layer leaching experimental device, which comprises a hollow sampling tube unit, wherein the lower end of the hollow sampling tube unit is provided with a water inlet and outlet 26, the upper end of the hollow sampling tube unit is provided with a port, and the port is communicated with a water storage unit; the water inlet and outlet 26 at the lower end of the hollow sampling tube unit is connected with a waste liquid collecting unit or a water storage unit; the side wall of the hollow sampling tube unit is provided with a side wall water outlet, and a sensor 15 is arranged at the side wall water outlet of the hollow sampling tube unit; one side of the hollow sampling tube unit penetrates through the interlayer sampling column 18, a sampling groove is formed in the interlayer sampling column 18, and the axial length of the interlayer sampling column 18 is larger than the diameter of the hollow sampling tube unit; the interlayer sampling post 18 is capable of both circumferential rotation and radial movement along the hollow sampling tube unit.
Referring to fig. 2, in a further embodiment of the present utility model, the water storage unit includes a water tank 1, one side of the water tank 1 is connected with a rainfall cavity, the side walls of the water tank 1 connected with the rainfall cavity are all provided with communication ports, the communication ports are provided with overflow plates 2, and the height of the overflow plates 2 is adjusted, so that the relative height of the communication ports and the water level height in the rainfall cavity can be changed.
The bottom of the water tank is provided with a water outlet 23, the bottom of the rainfall cavity is provided with a rainfall cavity water inlet 24 and a rainfall cavity water outlet 25 at intervals, the water outlet 23 is communicated with the rainfall cavity water inlet 24 through a pipeline, a peristaltic pump 4 is arranged at the pipeline, and the peristaltic pump 4 provides power to introduce water in the water tank 1 into the rainfall cavity; the peristaltic pump 4 continuously carries out the water of pulse type, constant flow to the overflow arrangement, unnecessary water in the overflow arrangement overflows into the water supply tank, realize automatic circulation water supply and water supply sufficiency, a plurality of rainfall holes 3 distributed at intervals are offered at the bottom of the rainfall cavity, when the water in the water tank 1 enters the rainfall cavity for the first time, the rainfall holes 3 can not be opened, when the water level in the rainfall cavity exceeds the overflow plate and returns to the water tank 1, the rainfall holes 3 are opened to start rainfall, a part of water in the rainfall cavity continuously overflows to keep constant liquid level, thereby keeping pressure constant, realizing keeping stable and unchanged at a specific rainfall intensity, keeping the water flow in the water supply steady state, and avoiding the phenomenon that the simulated rainfall intensity is unstable due to the influence of the water adding of the peristaltic pump on the hydrodynamic condition in the rainfall simulator.
Furthermore, in the embodiment of the utility model, needles and plugs with various specifications can be arranged in the rainfall holes 3, so that the experiment requirements can be met, the rainfall holes 3 are uniformly arranged, and the distance between every two adjacent rainfall holes 3 is 3cm.
Referring to fig. 3, further, in the embodiment of the present utility model, a plurality of sidewall water outlets are formed in the sidewall of the hollow sample collection unit at intervals, a sensor 15 and an adjusting valve 10 are disposed at each sidewall water outlet, a water permeable filter screen is further disposed at a port of each sidewall water outlet, the bottom of the hollow sample collection unit is disposed on the base 8 and detachably connected to the base 8, a water inlet and outlet 26 is formed in the center of the base 8, a water permeable filter screen 11 is further disposed at the lower end of the hollow sample collection unit, and the water inlet and outlet 26 is communicated with the rainfall cavity water inlet 24 or with the waste liquid collection unit according to test requirements.
Further, in the embodiment of the present utility model, the sensor 15 includes a sensor temperature, a sensor pH, an Ec sensor, an Eh sensor and a pressure sensor, and the corresponding sensor is installed according to the requirement, and a filter screen is added on the surface of the sensor, so that on one hand, the influence of a leaching sample is avoided, on the other hand, the sensor can be protected to a certain extent, and the service life of the sensor is prolonged. The sensor 15 can be connected with the computer 17 through the data converter 16 according to test requirements, so that automatic data storage and image display of real-time data are realized, and the water outlet channels and the corresponding sensors are arranged at all heights, so that multi-level water outlet can be realized, and multi-layer analysis of seepage under different vertical heights can be realized.
Further, in the embodiment of the utility model, the water tank 1 is placed on the rainfall device support 5, the rainfall device support 5 is a telescopic support, the height of the water tank 1 is convenient to adjust, and the rainfall device support 5 is also connected with the pulley 6, so that the movement of the rainfall device support 5 is convenient.
Further, in the embodiment of the utility model, the hollow sample collecting unit comprises a plurality of hollow tubes 7 which are vertically and sequentially connected, the end surfaces of every two adjacent hollow tubes 7 are connected through bolts, and a silica gel ring 9 is arranged at the connected end surfaces so as to ensure the stability and the tightness of the composite leaching column.
The embodiment of the utility model discloses a hollow sampling tube unit which comprises four hollow circular tubes, wherein two of the four hollow circular tubes are short circular tubes with the length of 30cm, and two hollow circular tubes are long circular tubes with the length of 60 cm. The long leaching column can be assembled through the flange plates, so that the requirement of part of experiments on the long leaching column is met.
Further, in the embodiment of the present utility model, the sample penetrates through the interlayer sampling column 18 on the side wall of the sampling tube unit, the interlayer sampling column 18 includes a middle sampling section and two solid sections at the two ends, the middle sampling end is provided with a sampling slot, the axial length of the interlayer sampling column 18 is far greater than the diameter of the hollow sampling tube unit, the interlayer sampling column 18 can rotate or pull along the side wall of the hollow sampling tube unit, so that the solid sample inside the sampling tube unit can be conveniently obtained through the sampling slot, and the sample is conveniently taken out through the pulling mode, and since the axial length of the interlayer sampling column 18 is far greater than the diameter of the hollow sampling tube unit, the interlayer sampling column 18 can be ensured to always penetrate through the hollow sampling tube unit in the pulling sampling process, the sampler is pulled out, and the solid section can replace the space of the solid sample taken out when the solid sample is sampled, so that the whole structure is not broken, and the relative stability of the structure is ensured.
Referring to fig. 4, in a further embodiment of the present utility model, a waste liquid collecting unit, a waste liquid barrel 21 and a collector 22, a water inlet and outlet 26 at the lower end of the hollow sampling tube unit is connected to a pipeline, two branch pipelines, namely a waste liquid branch pipe 19 and a sampling branch pipe 20, are respectively arranged on the pipeline, the waste liquid branch pipe 19 is communicated with the waste liquid barrel 21, and the sampling branch pipe 20 is communicated with the collector 22.
Further, in the embodiment of the present utility model, when a darcy experiment is required, the upper end of the hollow sampling tube unit is provided with the overflow device 12, the overflow device 12 is connected with the overflow tube 13, the overflow tube 13 is connected with the sample barrel 14, at this time, the water inlet and outlet 26 at the lower end is connected with the water outlet 25 of the rainfall cavity, and the rainfall hole 3 stops closing to stop rainfall.
The embodiment of the utility model discloses two experimental working principles:
when a rainfall leaching experiment is carried out:
a water outlet 23 on the water tank 1 is communicated with a water inlet 24 of a rainfall cavity, a water outlet 25 of the rainfall cavity is closed, a rainfall hole 3 is plugged by a blanking plug, when water in the rainfall cavity exceeds the overflow plate 2 and returns to the water tank 1, the blanking plug is taken away, the rainfall hole 3 begins to rainfall, the rainfall gradually flows into the bottom from the upper end of the hollow sampling tube unit, and the test begins;
in the test, liquid samples or solid samples between different layers are collected through side wall water outlet holes or interlayer sampling columns 18 of the side wall of the hollow sampling tube unit according to requirements, and experimental data between different layers are obtained through a sensor 15;
the waste liquid after the experiment is finished enters the waste liquid barrel 21 and the collector 22 respectively through the water inlet and outlet 26 at the bottom of the hollow sampling tube unit.
When darcy experiments were performed:
the overflow device 12 is arranged at the upper end of the hollow sampling tube unit and is sequentially communicated with the overflow tube 13 and the sample receiving barrel 14;
at the moment, the rainfall hole 3 is plugged by the plugging device, the rainfall hole 3 stops rainfall, the rainfall cavity water outlet 25 is opened, the rainfall cavity water outlet 25 is communicated with the water inlet and outlet 26 by a pipeline, and water in the water tank 1 sequentially passes through the rainfall cavity, the water inlet and outlet 26 and the rainfall cavity water outlet 25 and then enters from the bottom of the hollow sampling tube unit;
when the water level gradually reaches the upper end of the hollow sampling tube unit and enters the overflow device 12, overflowed water enters the sample receiving barrel 14 through the overflow tube 13.
The method for carrying out the dynamic leaching test comprises the following steps:
the experimental samples are naturally dried in the air, and the experimental samples are simply classified according to the size, and large-sized samples are required to be respectively crushed, ground and sieved. The solid sample which is not leached is subjected to relevant detection and analysis (such as XRD detection, XRF detection and the like).
Determining the design rainfall intensity and rainfall distribution condition of leaching simulation according to actual and design requirements, roughly determining the specification of a needle head and whether a stopper is installed or not according to the rainfall intensity, controlling the leaching intensity by adjusting the overflow height in the rainfall simulator, and determining the overflow height. So that the design simulation rain intensity is achieved and the stability is maintained.
The sample is placed in a hollow sampling tube unit and leaching is started.
Note that the changes of the pH value, the oxidation-reduction potential and Ec detected by the sensor 15 are observed, the sampling time is adjusted, the on and off time of the switch of each branch pipe is set according to the planned sampling time, the amount of the leaching solution sample is set in the automatic sampler, the solid sample is taken according to the planned sampling time, and the solid sample after leaching is taken out for relevant detection.
And stopping the test after the leaching sample amount meeting the experimental research requirement is obtained, and then carrying out processing analysis on the related leaching samples and data arrangement and analysis.
The method for carrying out static leaching experiments in the embodiment of the utility model comprises the following steps:
the experimental samples are naturally dried in the air, and simply classified according to the size, and massive samples are respectively crushed, ground and sieved to perform relevant detection and analysis on solid samples which are not leached yet.
Solid samples with different particle sizes are selected according to experimental requirements, a static leaching experiment is carried out by determining the size of the solid-liquid ratio, sampling time is selected according to practical requirements, sampling time and sampling amount of an automatic sampler are set according to the sampling time and sampling amount, and changes of pH, oxidation-reduction potential and Ec of monitoring data are observed in real time.
And stopping the test after the leaching sample amount meeting the experimental research requirement is obtained, and then carrying out treatment analysis on the related water sample.
The method for performing the Darcy seepage experiment comprises the following steps of:
according to the experiment, the isogranule solid samples with different particle diameters are selected for filling, so that in order to reduce the influence of porosity, the sample medium with the solid quality is ensured to be used for filling the same solid height when the sample medium is filled;
after the experimental device is adjusted and corrected, the stoppers are arranged in the rainfall hole 3, the water tank 1 is supplied with water, the water outlet 23 is opened, the water flow valve is adjusted, the water flow flows out at a small speed, and the pressure difference between the inlet and the outlet is at a small value.
When the seepage in the hollow sampling tube unit is stable, the data of the sensor 15 are collected for later experiments.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The multi-layer leaching experimental device is characterized by comprising a hollow sampling tube unit, wherein the lower end of the hollow sampling tube unit is provided with a water inlet and outlet (26), and the upper end of the hollow sampling tube unit is provided with a port;
the water inlet and outlet (26) is connected with a waste liquid collecting unit or a water storage unit, a rainfall hole (3) is formed in the water storage unit, and the rainfall hole (3) is positioned above the upper port of the sampling tube unit;
the side wall of the hollow sampling tube unit is provided with a side wall water outlet, and a sensor (15) is arranged at the side wall water outlet of the hollow sampling tube unit;
one side of the hollow sampling tube unit penetrates through the interlayer sampling column (18), a sampling groove is formed in the interlayer sampling column (18), and the axial length of the interlayer sampling column (18) is larger than the diameter of the hollow sampling tube unit; the interlayer sampling post (18) is capable of both circumferential rotation and radial movement along the hollow sampling tube unit.
2. The multi-layer leaching experimental device according to claim 1, wherein the water storage unit comprises a water tank (1), and a water outlet (23) is formed in the water tank (1);
the device also comprises a rainfall cavity, wherein a rainfall cavity water inlet (24) and a rainfall cavity water outlet (25) are formed in the bottom of the rainfall cavity, the water outlet (23) is communicated with the rainfall cavity water inlet (24), and the rainfall cavity water outlet (25) is communicated with a water inlet and outlet (26) at the lower end of the hollow sampling tube unit;
a peristaltic pump (4) is arranged at the joint of the water outlet (23) and the water inlet (24) of the rainfall cavity;
the rainfall hole (3) is formed in the bottom of the rainfall cavity;
the side walls of the rainfall cavity connected with the water tank (1) are provided with corresponding communication ports, and overflow plates (2) are arranged at the communication ports.
3. A multilayer leaching experimental device according to claim 2, characterized in that the rainfall holes (3) are evenly arranged, the spacing between every two adjacent rainfall holes (3) being 3cm.
4. The multi-layer leaching experimental device according to claim 2, wherein a base (8) is arranged at the lower end of the hollow sampling tube unit, a water inlet and outlet (26) is formed in the base (8), an adjusting valve is arranged at the water inlet and outlet (26), and a water permeable filter screen (11) is arranged on the base (8);
the water inlet and outlet (26) is communicated with a rainfall cavity water outlet (25) or a waste liquid collecting unit.
5. The multi-layer leaching experimental device according to claim 1, wherein an overflow device (12) is arranged at the upper end of the hollow sampling tube unit, the overflow device (12) is communicated with an overflow tube (13), and the overflow tube (13) is communicated with a sampling barrel (14).
6. The multi-layer leaching experimental device according to claim 1, wherein the side wall water outlets are axially arranged at intervals along the side wall of the hollow sampling tube unit, and a filter screen and an adjusting valve (10) are arranged at each side wall water outlet.
7. The multi-layer leaching experimental device according to claim 1, wherein the waste liquid collecting unit comprises a waste liquid barrel (21) and a collector (22);
the water inlet and outlet (26) is connected with the waste liquid branch pipe (19) and the sampling branch pipe (20), the waste liquid branch pipe (19) is communicated with the waste liquid barrel (21), and the sampling branch pipe (20) is communicated with the collector (22).
8. A multilayer leaching experimental device according to claim 1, wherein the interlayer sampling column (18) comprises a middle sampling section and two end solid sections;
the sampling groove is arranged in the sampling section.
9. The multi-layer leaching experimental device according to claim 1, wherein the hollow sampling tube unit comprises a plurality of hollow tubes (7) which are connected in sequence in the axial direction.
10. The multi-layer leaching experimental device according to claim 9, wherein in the plurality of hollow tubes (7) which are connected in sequence in the axial direction, a silica gel ring (9) is arranged on the connecting end face of each two adjacent hollow tubes (7).
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