Improved soil leaching experiment device

Abstract

The utility model relates to an improved soil leaching experiment device. The utility model relates to an improved soil leaching experiment device, which comprises: a transparent leaching pipe, which is provided with scales, and the scales are gradually increased from bottom to top; the sampling tube is obliquely and upwards inserted in the one-third position or the two-thirds position of the scale of the transparent leaching tube; wherein an isolation net is arranged at a pipe opening of the sampling pipe. The sampling tube is obliquely and upwards inserted into the one-third position or the two-thirds position of the scale of the transparent leaching tube, so that the cross section of the sampling tube and the cross section of the transparent leaching tube form a certain included angle (the included angle is also called a sampling angle), the included angle is arranged between 30 degrees and 80 degrees, and in the range of the included angle, the sampling angle is larger than the sampling angle. And the leaching liquid can well infiltrate into the sampling pipe under the action of gravity, so that the leaching liquid leached to the soil layer is effectively intercepted, the situation that the leaching liquid is absorbed by surrounding soil before flowing out or infiltrates around the sampling pipe is avoided, and the situation that the leaching liquid cannot be collected by the sampling pipe is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil leaching experiment, in particular to an improved soil leaching experiment device. BACKGROUND

[0002] After the soil is polluted by heavy metals, the heavy metal pollutants are easy to enter the water body under the action of water force, resulting in surface water pollution, groundwater pollution and other secondary ecological environment problems such as ecological system degradation. Therefore, before carrying out the prevention and treatment of soil heavy metal pollution and soil remediation, the law of migration and transformation of heavy metal pollutants in soil needs to be mastered. Soil leaching experiment is an experiment that uses soil leaching device to study the migration and transformation of water and heavy metal components in soil by simulating the process of rainfall into soil. At the same time, physical, chemical and microbial remediation tests can also be carried out through the soil leaching device to evaluate the effect of remediation technology in treating contaminated soil, provide theoretical basis and technical support for practical application, and also provide important reference for formulating soil remediation scheme.

[0003] When the traditional sampling pipe is used for sampling, the required leaching solution flow rate is relatively small. When the sampling pipe is inserted into the leaching pipe to collect the leachate, the leachate is easy to be absorbed by the surrounding soil or bypass the sampling pipe and infiltrate, so that the sampling pipe cannot collect the leachate. CONTENT OF THE INVENTION

[0004] To solve or partially solve the problems in the related art, the present application provides an improved soil leaching experiment device.

[0005] To achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] An improved soil leaching experiment device, wherein the improved soil leaching experiment device comprises:

[0007] A transparent leaching pipe, which is provided with a scale, and the scale is sequentially increased from bottom to top;

[0008] A sampling pipe, which is inserted into the transparent leaching pipe at one-third or two-thirds of the scale in an upward inclined manner, and the included angle between the sampling pipe and the cross section of the transparent leaching pipe is between 30° and 80°;

[0009] Wherein, the sampling pipe is provided with a isolation net at the pipe opening.

[0010] Optionally, the one-third and two-thirds of the scale of the transparent leaching pipe are provided with sampling ports, and the sampling ports are sealed by a piston.

[0011] Optionally, the outer wall of the sampling pipe is marked with two identification lines of blue and red, and the two identification lines have a spacing therebetween.

[0012] Optionally, the bottom of the transparent leaching pipe is connected with a liquid collecting funnel, a filter layer is arranged at the connection between the sampling pipe and the liquid collecting funnel, a liquid outlet is arranged at the bottom of the liquid collecting funnel, and a leaching liquid collecting bottle is arranged below the liquid outlet.

[0013] Optionally, a leaching solution distributor is arranged at the top of the transparent leaching pipe, and the leaching solution distributor is connected with a leaching solution tank through a silica gel pipe.

[0014] Optionally, a peristaltic pump is arranged between the leaching solution distributor and the leaching solution tank, and the input end and the output end of the peristaltic pump are connected with the silica gel pipe.

[0015] Optionally, the diameter of the filter layer is greater than the outer diameter of the transparent leaching pipe, and the part of the filter layer outside the transparent leaching pipe is connected with a support through a flange.

[0016] The application has the beneficial effects that the sampling pipe is inclined and inserted into the transparent leaching pipe at one third or two thirds of the scale, so that the sampling pipe and the cross section of the transparent leaching pipe form a certain included angle (the included angle is also called a sampling angle), and the included angle is set to be between 30° and 80°. In the range of the included angle, the leaching liquid can well infiltrate into the sampling pipe under the action of gravity, so as to effectively intercept the leaching liquid leached to the soil layer, so as to avoid the situation that the leaching liquid is not yet flowed out but is absorbed by the surrounding soil or infiltrates around the sampling pipe, so as to avoid that the sampling pipe cannot collect the leaching liquid.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and in which the exemplary embodiment of the present application is shown.

[0019] Figure 1 is a structural schematic view of the improved soil leaching experiment device shown in the embodiment of the present application;

[0020] Figure 2 is a structural schematic view of the sampling port shown in the embodiment of the present application;

[0021] Figure 3 is a structural schematic view of the piston shown in the embodiment of the present application;

[0022] Figure 4 is a structural schematic view of the sampling pipe shown in the embodiment of the present application;

[0023] Figure 5is a structural schematic diagram of the sampling tube inserted into the transparent leaching pipe shown in the embodiments of the present application;

[0024] Figure 6 is a top view of the filter layer shown in the embodiments of the present application.

[0025] The reference signs: 1 transparent leaching pipe, 2 liquid inlet, 3 sampling port, 4 liquid collecting funnel, 5 liquid outlet, 6 filter layer, 7 bracket, 8 flange, 9 piston, 10 scale, 11 sampling tube, 12 leaching solution distributor, 13 peristaltic pump, 14 leaching solution tank, 15 silica gel tube, 16 leaching solution collecting bottle, 17 anti-skid rubber ring, 18 identification line, 19 isolation net. DETAILED DESCRIPTION

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0028] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood as the specific circumstances.

[0029] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0030] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0031] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

[0032] The above is only an optional embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0033] In order to make the purposes, technical solutions and beneficial effects of the present application more clear, the preferred embodiments of the present application will be described in detail below with reference to the drawings, so as to facilitate the understanding of the skilled in the art.

[0034] Embodiment one:

[0035] Referring to Figure 1 An improved soil leaching experiment device, the improved soil leaching experiment device comprises:

[0036] A transparent leaching pipe 1 is provided with a scale 10, and the scale 10 is sequentially increased from bottom to top;

[0037] The sampling tube 11 is obliquely inserted into the scale 10 of the transparent leaching pipe 1 at one third or two thirds of the scale 10, and the included angle between the sampling tube 11 and the cross section of the transparent leaching pipe 1 is between 30° and 80°.

[0038] The sampling tube 11 is obliquely inserted into the scale 10 of the transparent leaching pipe 1 at one third or two thirds of the scale 10, and the included angle between the sampling tube 11 and the cross section of the transparent leaching pipe 1 is between 30° and 80°.

[0039] Specifically, the transparent leaching pipe 1 is made of organic glass, with a total length of 1000 mm and an inner diameter of 80 mm. The length is displayed by the scale 10. One end of the sampling tube 11 is a sharp nozzle, and the other end is connected with a silica gel tube. The sharp nozzle end of the sampling tube 11 is obliquely inserted into the scale 10 of the transparent leaching pipe 1 at one third or two thirds of the scale 10, so that the sampling tube 11 and the cross section of the transparent leaching pipe 1 form a certain included angle, and the included angle is between 30° and 80°. The isolation net 19 is fixed at the mouth of the sampling tube 11, which can prevent the soil filler from flowing out with the leachate.

[0040] Before sampling, 5000g of soil is filled into the transparent leaching pipe 1, and the filling height is about 800mm after compaction. The average annual precipitation of a certain place is 1055.9mm, and the evaporation problem is not considered in the test. The leaching amount of a single column is 1318mL / cycle (1 cycle 5d, simulating one quarter of the rainfall). The leaching test is carried out. The dynamic leaching test is dry-wet alternating leaching, the leaching solution is pH 5.0, and 3 repetitions and 1 blank control are set. A total of 3 years of rainfall is simulated, and the dry-wet alternating setting is leaching 1d and stopping 4d, and the cycle is repeated. The transparent leaching pipe 1 is filled and then wetted with deionized water until water drops from the outlet, and then the wetting is stopped. During the test, the leaching solution is added to the top of the transparent leaching pipe 1, and the sampling tube 11 is obliquely inserted into the scale 10 of the transparent leaching pipe 1 at one third (middle layer soil) or two thirds (surface layer soil) of the scale 10 during sampling. During the leaching period, the leachate is taken from the scale 10 at one third or two thirds of the scale 10 every 5d, respectively, for determining the heavy metal concentration of the surface layer and the middle layer soil.

[0041] In this embodiment, the sampling tube 11 is obliquely inserted into the scale 10 of the transparent leaching pipe 1 at one third or two thirds of the scale 10, so that the sampling tube 11 and the cross section of the transparent leaching pipe 1 form a certain included angle (which is also called sampling angle), and the included angle is set to be between 30° and 80°. Within this range of included angle, the leachate can well infiltrate into the sampling tube 11 by gravity, thereby effectively intercepting the leachate leached to this soil layer, so as to avoid the situation that the leachate is absorbed by the surrounding soil or bypasses the sampling tube 11 before flowing out, thereby avoiding that the sampling tube 11 cannot collect the leachate.

[0042] It should be noted that, due to the relatively small flow rate of the leaching solution, if the included angle is too small, the leaching solution may be absorbed by the surrounding soil or bypass the sampling pipe 11 before it flows out, so the included angle cannot be too small. In long-term practice, the operator found that when the included angle is greater than or equal to 30°, the leaching solution collection effect of the sampling pipe 11 is more ideal. In addition, since the sampling pipe 11 cannot be perpendicular to the cross section of the transparent leaching pipe 1, the included angle should be less than 90°, and it is more reasonable to set the included angle between 30° and 80°, which can ensure the collection of the leaching solution within this angle range.

[0043] In this embodiment, the included angle between the sampling pipe 11 and the cross section of the transparent leaching pipe 1 is 30° or 45°, which can achieve better collection effect.

[0044] Embodiment Two:

[0045] Referring to Figures 1 to 3 , based on Embodiment One, optionally, the sampling port 3 is arranged at one-third and two-thirds of the scale 10 of the transparent leaching pipe 1, and the sampling port 3 is sealed by the piston 9.

[0046] Specifically, the sampling port 3 includes a middle layer sampling port and a surface layer sampling port. The sampling port 3 arranged at one-third of the scale 10 of the transparent leaching pipe 1 is the middle layer sampling port, and the sampling port 3 arranged at two-thirds of the scale 10 of the transparent leaching pipe 1 is the surface layer sampling port. When not sampling, the sampling port 3 is sealed by the piston 9 to prevent the leaching solution and soil from flowing out. When sampling, the piston 9 needs to be removed, and after the piston 9 is removed, the middle layer and surface layer soil can be sampled through the sampling port 3, or the sampling pipe 11 matched with the device is inserted to collect the leaching solution sample. The anti-skid rubber ring 17 is arranged at the sampling port 3 to fix the piston 9 and the sampling pipe 11.

[0047] Referring to Figure 4 and Figure 5 , optionally, the outer wall of the sampling pipe 11 is marked with two identification lines 18 of blue and red, and the two identification lines 18 have a spacing therebetween.

[0048] Specifically, the blue identification line is located above the red identification line. When the sampling pipe 11 is inserted into the transparent leaching pipe 1 by upwardly inclining, the blue scale line is aligned with the upper edge of the sampling port anti-skid rubber ring 17, and the red scale line is aligned with the lower edge of the sampling port anti-skid rubber ring 17, which can ensure the sampling angle of the sampling pipe 11. By changing the spacing of the two identification lines 18 of blue and red, the sampling angle of the sampling pipe 11 can be changed.

[0049] Optionally, the bottom of the transparent leaching pipe 1 is connected with a liquid collecting funnel 4, the connection between the sampling pipe 11 and the liquid collecting funnel 4 is provided with a filter layer 6, the bottom of the liquid collecting funnel 4 is provided with a liquid outlet 5, and the leaching solution collecting bottle 16 is arranged below the liquid outlet 5.

[0050] Specifically, the leachate in the deep soil flows into the leachate collection bottle 16 through the outlet 5, is collected by the leachate collection bottle 16 to determine the heavy metal concentration of the deep soil, and the filter layer 6 is used to prevent the soil filler from flowing out with the leachate (the top view of the filter layer 6 is shown in Figure 6 ).

[0051] Referring to Figure 1 Optionally, the top of the transparent leaching pipe 1 is provided with a leaching solution distributor 12, and the upper end of the leaching solution distributor 12 is connected with a leaching solution tank 14 through a silica gel pipe 15.

[0052] Specifically, the leaching solution tank 14 contains heavy metal contaminated leaching solution, and is used to provide the heavy metal contaminated leaching solution. One end of the silica gel pipe 15 is connected with the leaching solution tank 14, and the other end is connected with the upper end of the leaching solution distributor 12. The top of the transparent leaching pipe 1 is the inlet 2, and the leaching solution distributor 12 is located at the inlet 2. The leaching solution in the leaching solution tank 14 is sent to the upper end of the leaching solution distributor 12 through the silica gel pipe 15. The leaching solution distributor 12 is uniformly provided with a plurality of through holes. Through the through holes, the leaching solution is uniformly sprinkled into the soil filled in the transparent leaching pipe 1.

[0053] Optionally, a peristaltic pump 13 is arranged between the leaching solution distributor 12 and the leaching solution tank 14, and the input end and the output end of the peristaltic pump 13 are respectively connected with the silica gel pipe 15.

[0054] Specifically, the peristaltic pump 13 is a liquid conveying device with controllable flow rate. The peristaltic pump 13 is arranged to convey the leaching solution into the transparent leaching pipe 1.

[0055] Optionally, the diameter of the filter layer 6 is greater than the outer diameter of the transparent leaching pipe 1, and the part of the filter layer 6 located outside the transparent leaching pipe 1 is connected with a support 7 through a flange 8.

[0056] Specifically, the support 7 is used to provide a mounting platform for the filter layer 6 and to support the transparent leaching pipe 1.

[0057] In this embodiment, the sampling port 3 is arranged at one third and two thirds of the scale 10 of the transparent leaching pipe 1, and the outlet 5 is arranged at the bottom of the collection funnel 4. The surface layer and the middle layer of the soil can be sampled through the sampling port 3. The leachate at the surface layer, the middle layer and the deep layer can be collected through the outlet 5 and the sampling tube 11 cooperating with the sampling port 3. In this way, the layered sampling of the soil and the layered collection of the leachate are realized.

[0058] The device has simple structure, easy operation and low manufacturing cost. The main body mechanism and accessories of the device can be scaled and manufactured according to the test purpose.

[0059] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the sizes of the drawings are not related to the specific objects, and the sizes of the objects can be changed arbitrarily.

Claims

1. An improved soil leaching experimental apparatus, characterized by, The improved soil leaching experiment device comprises: A transparent leaching pipe (1) is provided with a scale (10) on it, and the scale (10) is sequentially increased from bottom to top; A sampling pipe (11) is obliquely inserted into the scale (10) of the transparent leaching pipe (1) at one-third or two-thirds of the scale (10), and the included angle between the sampling pipe (11) and the cross section of the transparent leaching pipe (1) is between 30°-80°; Wherein, the sampling pipe (11) is provided with an isolation net (19) at the pipe opening.

2. The improved soil leaching experiment apparatus of claim 1, wherein, The scale (10) of the transparent leaching pipe (1) is provided with a sampling port (3) at one-third and two-thirds of the scale (10), and the sampling port (3) is sealed by a piston (9).

3. The improved soil leaching test apparatus of claim 1 or 2, wherein, The outer wall of the sampling pipe (11) is marked with two blue and red identification lines (18), and the two identification lines (18) have a spacing therebetween.

4. The improved soil leaching experimental apparatus according to claim 1 or 2, wherein The bottom of the transparent leaching pipe (1) is connected with a liquid collecting funnel (4), the connecting part of the sampling pipe (11) and the liquid collecting funnel (4) is provided with a filter separation layer (6), the bottom of the liquid collecting funnel (4) is provided with a liquid outlet (5), and the lower part of the liquid outlet (5) is provided with a leaching liquid collecting bottle (16).

5. The improved soil leaching experimental apparatus of claim 4, wherein, The top of the transparent leaching pipe (1) is provided with a leaching solution distributor (12), and the leaching solution distributor (12) is connected with a leaching solution tank (14) through a silica gel pipe (15).

6. The improved soil leaching experimental apparatus of claim 5, wherein, A peristaltic pump (13) is arranged between the leaching solution distributor (12) and the leaching solution tank (14), and the input end and the output end of the peristaltic pump (13) are respectively connected with the silica gel pipe (15).

7. The improved soil leaching experimental apparatus of claim 4, wherein, The diameter of the filter separation layer (6) is greater than the outer diameter of the transparent leaching pipe (1), and the part of the filter separation layer (6) outside the transparent leaching pipe (1) is connected with a support (7) through a flange (8).

Images