CN211496998U - Experimental equipment for permeable reactive barrier for treating pollutants in underground water - Google Patents
Experimental equipment for permeable reactive barrier for treating pollutants in underground water Download PDFInfo
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- CN211496998U CN211496998U CN201922178155.5U CN201922178155U CN211496998U CN 211496998 U CN211496998 U CN 211496998U CN 201922178155 U CN201922178155 U CN 201922178155U CN 211496998 U CN211496998 U CN 211496998U
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Abstract
The utility model relates to a handle infiltration reactive barrier experimental facilities of pollutant in groundwater, it includes: the device comprises a sewage container, a sewage injection pump, a reactant container, a reactant injection pump, an overflow groove, a reaction column and a rectifying plate, wherein the head end of the reaction column is provided with a sewage injection port; the tail end of the reaction column is provided with a liquid outlet; seepage media are filled in the reaction column; a reactant injection pipe and a sampling port are sequentially arranged from the sewage injection port to the liquid discharge port; the reactant container is connected with the inside of the reaction column through a reactant injection pump and a reactant injection pipe; the sewage container is connected with the sewage injection port through a sewage injection pump; the overflow launder is connected with the liquid outlet. The utility model discloses can effectively simulate out the dispersion condition of single injection point in flowing liquid, provide important foundation for arranging quantity and the arrangement mode of single injection point source on later stage osmotic reaction wall.
Description
Technical Field
The utility model belongs to the technical field of groundwater pollutant handles, in particular to handle infiltration reactive barrier experimental facilities of groundwater pollutant.
Background
A Permeable Reactive Barrier (PRB) is a treatment system for removing pollutants in an underground water environment with small aquifer thickness and shallow burial depth, is generally in a pollutant transport dispersion area structure in an underground water seepage field, and is filled with a granular medium with functions of adsorption, acid-base neutralization or ion exchange and the like according to chemical components and control requirements of the pollutants so as to absorb or remove general acid-base, heavy metal and trace organic pollutants, and can be used for partitioning a polluted area of the underground water environment, purifying the pollutants transported with the underground water or isolating a pollutant release source.
One treatment mode of the permeable reactive barrier is to inject a chemical drug solvent or a biological bacteria solvent into an aquifer containing pollutants, and the injected chemical drug solvent or biological bacteria solvent can disperse along with the seepage transportation of underground water, so that a reaction zone is formed in an underground water flow field in a pollution dispersion area, the pollutants which are transported along with the seepage transportation of the underground water are directly removed by reaction, and meanwhile, the transportation path of the pollutants is blocked. At present, through a large number of searches, experimental equipment capable of reasonably simulating the dispersion condition of a chemical solvent or a biological bacteria solvent in water is not found, and the simulation of the dispersion condition of the chemical solvent or the biological bacteria solvent in water has important guiding significance for the design of a permeable reactive barrier.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem and provide a handle infiltration reaction wall experimental facilities of groundwater pollutant, it can solve the technical problem that can't rationally simulate out the dispersed condition of chemical solvent or biological fungus solvent in aqueous at present.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a permeable reactive barrier experimental facility for treating pollutants in groundwater, comprising: a sewage container, a sewage injection pump, a reactant container, a reactant injection pump, an overflow groove and a reaction column filled with seepage medium, wherein,
the head end of the reaction column is provided with a sewage injection port; the tail end of the reaction column is provided with a liquid outlet; the interior of the reaction column is filled with seepage medium; a reactant injection pipe and at least two sampling ports are sequentially arranged from the sewage injection port to the liquid discharge port;
the liquid outlet end of the reactant container is connected with the liquid inlet end of the reactant injection pump through a pipeline; the liquid outlet end of the reactant injection pump is connected with the interior of the reaction column through the reactant injection pipe;
the sewage injection pump is arranged in the sewage container, and the sewage container is connected with the sewage injection port through a pipeline;
the overflow groove is connected with the liquid outlet through a pipeline.
The utility model has the advantages that:
(1) the utility model discloses the infiltration reaction wall experimental facilities of pollutant in the processing groundwater is through single injection point injection reactant to the pollutant that flows in the reaction column is handled, need not construct whole infiltration reaction wall, has practiced thrift equipment occupation space, has reduced manufacturing cost;
(2) the utility model discloses the infiltration reaction wall experimental facilities who handles the aquatic pollutant provide important foundation through the quantity of arranging and the arrangement mode of single injection point source on the later stage infiltration reaction wall through the simulation to single injection point.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the reactant injection pipe is of an L-shaped structure formed by connecting a horizontal pipe and a vertical pipe, the horizontal pipe is positioned on the central axis of the reaction column, the liquid outlet end of the horizontal pipe is consistent with the flowing direction of the seepage medium, and the liquid inlet end of the vertical pipe is connected with the liquid outlet end of the reactant injection pump.
The beneficial effect of adopting the further scheme is that: the utility model discloses the violently pipe of reactant injection pipe goes out the liquid end and regards as the release point source, and the reactant that should release the point source and pour into can transport along with the seepage flow medium's in the reaction column liquid and take place radial dispersion and fore-and-aft dispersion to form an axisymmetric transportation dispersion region at the play liquid end of reactant injection pipe, this is unanimous with the dispersion condition of single release point source on the infiltration reaction wall in the reality, thereby helps the user to simulate the dispersion change of reactant in the groundwater flow field.
Further, the distance between the liquid outlet end of the vertical pipe and the sewage injection port along the flowing direction of the seepage medium is 0.25-0.35 m.
The beneficial effect of adopting the further scheme is that: a0.25-0.35 m rectification section is arranged between the liquid outlet end of the reactant injection pipe and the sewage injection port, and is favorable for homogenizing the seepage flow velocity on the overflowing section of the sewage injection port.
Further, the inner diameter of the reaction column is 0.08-0.15m, and the length of the reaction column is 10.5-11.6 m.
The beneficial effect of adopting the further scheme is that: the reasonable inner diameter can provide enough space for the radial dispersion of the reactant in the reaction column to help a user to know the final dispersion condition of the reactant; reasonable length can help the user arrange suitable sample connection quantity to improve the accuracy of experiment.
Further, the reaction column is prepared from at least one of PP material, PC material, PE material and PVC material.
The beneficial effect of adopting the further scheme is that: the PP material, the PC material, the PE material, the PVC material and other materials have good tightness and good wear resistance, are simple and easy to obtain, and contribute to reducing the manufacturing cost.
Further, the seepage medium is sand, gravel or sand-gravel.
The beneficial effect of adopting the further scheme is that: the diffusion environment of the reactant in the liquid can be simulated really by arranging the seepage medium, and the experimental accuracy is improved.
Furthermore, the seepage medium is sand-included gravel, wherein the grain diameter of the gravel is 2mm-4mm, the grain diameter of the sand is 0.25mm-0.5mm, the grading ratio is 9:5, the seepage coefficient K is 76.9m/d, and Pe is 2.68 multiplied by 102.
Furthermore, a valve is arranged on a pipeline between the sewage injection pump and the sewage injection port.
The beneficial effect of adopting the further scheme is that: through setting up the valve and can controlling sewage and get into the reaction column, simple structure, convenient operation.
Furthermore, a flow meter is arranged on a pipeline between the sewage injection pump and the sewage injection port.
The beneficial effect of adopting the further scheme is that: the change of the sewage injection can be monitored through the flow meter, and the control of the sewage injection is enhanced.
Further, the reactant injection pump is a metering pump.
The beneficial effect of adopting the further scheme is that: the injection amount of the reactant can be controlled through the metering pump, and the control of the injection of the reactant is enhanced.
Furthermore, a plurality of brackets for fixedly mounting the reaction column are arranged below the reaction column.
The beneficial effect of adopting the further scheme is that: can provide the support for the reaction column through the support, play the effect of protection reaction column.
Drawings
FIG. 1 is a schematic structural view of the permeable reactive barrier experimental facility for treating pollutants in groundwater according to the present invention,
in the drawings, the components represented by the respective reference numerals are listed below:
2. a sewage container 4, a sewage injection pump 6, a reactant container 8, a reactant injection pump 10, an overflow groove 12, a seepage medium 14, a reaction column 16, a sewage injection port 18, a liquid discharge port 20, a reactant injection pipe 20a, a horizontal pipe 20b, a vertical pipe 22 and a sampling port; 36. a valve; 42. a flow meter; 48. a support;
fig. 2 is the utility model discloses the reactant is in the reaction column continuous constant release transport dispersion schematic diagram, and wherein, the X axle is vertical dispersion direction, and the Y axle is radial dispersion direction, and the O point is the injection point of reactant, and u is the upstream region of O point.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. 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 invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be further described with reference to the accompanying drawings 1-2:
implementation mode one
The present embodiment provides a permeable reactive barrier experimental apparatus for treating pollutants in groundwater, as shown in fig. 1, comprising: the system comprises a sewage container 2, a sewage injection pump 4, a reactant container 6, a reactant injection pump 8, an overflow groove 10 and a reaction column 14 filled with a seepage medium 12, wherein as shown in fig. 1, a sewage injection port 16 is arranged at the head end of the reaction column 14; a liquid outlet 18 is arranged at the tail end of the reaction column 14; the interior of the reaction column 14 is filled with a seepage medium 12; a reactant injection pipe 20 and at least two sampling ports 22 are sequentially arranged from the sewage injection port 16 to the liquid discharge port 18; as shown in fig. 1, the liquid outlet end of the reactant container 6 is connected with the liquid inlet end of the reactant injection pump 8 through a pipeline; the liquid outlet end of the reactant injection pump 8 is connected with the inside of the reaction column 14 through the reactant injection pipe 20; as shown in fig. 1, the sewage injection pump 4 is disposed in the sewage container 2, and the sewage container 2 is connected to the sewage injection port 16 through a pipe; as shown in fig. 1, the overflow trough 10 is connected to the drain 18 by a pipe.
The technical problem that the dispersion condition of a chemical solvent or a biological bacterium solvent in water cannot be reasonably simulated at present can be solved by the implementation mode.
As shown in fig. 2, the pollutants flowing in the reaction column 14 are treated by injecting the reactant through a single injection point, and the whole permeable reaction wall does not need to be constructed, so that the occupied space of the equipment is saved, and the manufacturing cost is reduced; through the simulation of the single injection point, an important basis is provided for the arrangement quantity and the arrangement mode of the single injection point sources on the late-stage infiltration reaction wall.
Further, the reactant injection pipe 20 is an L-shaped structure formed by connecting a horizontal pipe 20a and a vertical pipe 20b, the horizontal pipe 20a is located on the central axis of the reaction column 14, the liquid outlet end of the horizontal pipe 20a is in the same direction as the flow direction of the seepage medium 12, and the liquid inlet end of the vertical pipe 20b is connected with the liquid outlet end of the reactant injection pump 8.
Therefore, the utility model discloses violently pipe 20a of reactant injection pipe goes out the liquid end and regards as the release point source, and the reactant that should release the point source injection can transport and take place radial dispersion and fore-and-aft dispersion along with the seepage flow medium's in the reaction column liquid to form an axisymmetric transportation dispersion region at the play liquid end of reactant injection pipe 20, this is unanimous with the dispersion condition of single release point source on the infiltration reaction wall in the reality, thereby helps the user to simulate the dispersion change of reactant in groundwater flow field.
In order to improve the treatment effect of the reactant, the distance between the outlet end of the vertical pipe 20b and the sewage injection port 16 along the flowing direction of the seepage medium 12 is 0.25-0.35 m.
Thus, a 0.25-0.35m rectifying section is arranged between the liquid outlet end of the reactant injection pipe 20 and the sewage injection port 16, which is helpful for homogenizing the seepage flow velocity on the flow cross section of the sewage injection port 16.
Wherein, the reaction column 14 is prepared by at least one of PP material, PC material, PE material and PVC material. The PP material, the PC material, the PE material, the PVC material and other materials have good tightness and good wear resistance, are simple and easy to obtain, and contribute to reducing the manufacturing cost.
The seepage medium 12 is sand, gravel or sand-gravel, the dispersion environment of a reactant in liquid can be simulated really by arranging the seepage medium 12, and the experimental accuracy is improved, specifically, the seepage medium 12 is the sand-gravel, wherein the particle diameter of the gravel is 2mm-4mm, the particle diameter of the sand is 0.25mm-0.5mm, the grading ratio is 9:5, the seepage coefficient K is 76.9m/d, and the Pe is 2.68 × 102。
In order to improve the accuracy of the experiment, the inner diameter of the reaction column 14 is 0.08-0.15m, and the length of the reaction column 14 is 10.5-11.6 m.
In this way, the reasonable inner diameter can provide enough space for the radial dispersion of the reactant in the reaction column 14 to help the user know the final dispersion of the reactant; a reasonable length can help the user to place the proper number of sampling ports 22, thereby increasing the accuracy of the experiment.
In addition, for convenience of detection and control, the present embodiment may be modified as follows:
a valve 36 is further provided on the pipe between the sewage injection pump 4 and the sewage injection port 16. Therefore, the sewage can be controlled to enter the reaction column 14 by arranging the valve 36, and the device has a simple structure and is convenient to operate.
A flow meter 42 is further provided in the pipe between the sewage injection pump 4 and the sewage injection port 16.
Thus, the flow meter 42 can monitor the change of the sewage injection, and enhance the control of the sewage injection. The reactant injection pump 8 is a metering pump.
In this way, the injection amount of the reactant can be controlled by the metering pump, enhancing the control of the injection of the reactant.
The embodiment provides a permeable reactive barrier experimental facility for treating pollutants in groundwater, and a plurality of brackets 48 for fixedly mounting the reactive column 14 are further arranged below the reactive column 14.
The beneficial effect of adopting the further scheme is that: the support 48 can provide support for the reaction column 14, so that the reaction column 14 is at a certain distance from the ground, and the reaction column 14 is protected.
For a more complete description of the present invention, we also provide a preferred embodiment below:
second embodiment
The present embodiment provides a permeable reactive barrier experimental apparatus for treating pollutants in groundwater, as shown in fig. 1, comprising: the system comprises a sewage container 2, a sewage injection pump 4, a reactant container 6, a reactant injection pump 8, an overflow groove 10 and a reaction column 14 filled with a seepage medium 12, wherein as shown in fig. 1, a sewage injection port 16 is arranged at the head end of the reaction column 14; a liquid outlet 18 is arranged at the tail end of the reaction column 14; the interior of the reaction column 14 is filled with a seepage medium 12; a reactant injection pipe 20 and at least two sampling ports 22 are sequentially arranged from the sewage injection port 16 to the liquid discharge port 18; the reactant injection pipe 20 is an L-shaped structure formed by connecting a horizontal pipe 20a and a vertical pipe 20b, the horizontal pipe 20a is located on the central axis of the reaction column 14, the liquid outlet end of the horizontal pipe 20a is in accordance with the flowing direction of the seepage medium 12, the liquid inlet end of the vertical pipe 20b is connected with the liquid outlet end of the reactant injection pump 8, and the distance between the liquid outlet end of the vertical pipe 20b and the sewage injection port 16 along the flowing direction of the seepage medium 12 is 0.25-0.35 m;
as shown in fig. 1, the liquid outlet end of the reactant container 6 is connected with the liquid inlet end of the reactant injection pump 8 through a pipeline; the liquid outlet end of the reactant injection pump 8 is connected with the inside of the reaction column 14 through the reactant injection pipe 20;
as shown in fig. 1, the sewage injection pump 4 is disposed in the sewage container 2, and the sewage container 2 is connected to the sewage injection port 16 through a pipe;
as shown in fig. 1, the overflow trough 10 is connected with the liquid discharge port 18 through a pipeline;
as shown in fig. 1, a valve 36 and a flow meter 42 are further provided on the pipeline between the sewage injection pump 4 and the sewage injection port 16; a plurality of brackets 48 for fixedly mounting the reaction column 14 are further provided below the reaction column 14.
Wherein the seepage medium 12 is sand-included gravel, the particle size of the gravel is 2mm-4mm, the particle size of the sand is 0.25mm-0.5mm, the grading ratio is 9:5, the seepage coefficient K is 76.9m/d, and Pe is 2.68 × 102。
Wherein the inner diameter of the reaction column 14 is 0.1m, and the length of the reaction column 14 is 11 m.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A permeable reactive barrier experimental facility for treating pollutants in groundwater is characterized by comprising: a sewage container (2), a sewage injection pump (4), a reactant container (6), a reactant injection pump (8), an overflow trough (10) and a reaction column (14) filled with a seepage medium (12) in the column body, wherein,
the head end of the reaction column (14) is provided with a sewage injection port (16); a liquid outlet (18) is arranged at the tail end of the reaction column (14); the inside of the reaction column (14) is filled with a seepage medium (12); a reactant injection pipe (20) and at least two sampling ports (22) are sequentially arranged from the sewage injection port (16) to the liquid discharge port (18);
the liquid outlet end of the reactant container (6) is connected with the liquid inlet end of the reactant injection pump (8) through a pipeline; the liquid outlet end of the reactant injection pump (8) is connected with the interior of the reaction column (14) through the reactant injection pipe (20);
the sewage injection pump (4) is arranged in the sewage container (2), and the sewage container (2) is connected with the sewage injection port (16) through a pipeline;
the overflow groove (10) is connected with the liquid outlet (18) through a pipeline.
2. The permeable reactive barrier experimental facility for treating pollutants in groundwater according to claim 1, wherein the reactant injection pipe (20) is an L-shaped structure formed by connecting a horizontal pipe (20a) and a vertical pipe (20b), the horizontal pipe (20a) is located on a central axis of the reaction column (14), a liquid outlet end of the horizontal pipe (20a) is in accordance with a flowing direction of the seepage medium (12), and a liquid inlet end of the vertical pipe (20b) is connected with a liquid outlet end of the reactant injection pump (8).
3. A permeable reactive barrier experimental apparatus for treating pollutants in groundwater according to claim 2, wherein the distance between the outlet end of the standpipe (20b) and the sewage injection inlet (16) in the flowing direction of the seepage medium (12) is 0.25-0.35 m.
4. A permeable reactive barrier experimental facility for treating pollutants in groundwater according to claim 1, wherein the inner diameter of the reaction column (14) is 0.08-0.15m, and the length of the reaction column (14) is 10.5-11.6 m.
5. A permeable reactive barrier experimental facility for treating pollutants in groundwater according to claim 1, wherein the reactive column (14) is made of at least one material selected from PP material, PC material, PE material and PVC material.
6. A permeable reactive barrier experimental apparatus for treating pollutants in groundwater according to claim 1, wherein the seepage medium (12) is sand, gravel or sand-in-gravel.
7. The permeable reactive barrier experimental facility for treating pollutants in groundwater according to claim 6, wherein the permeable medium (12) is sand-gravel, the diameter of the gravel is 2mm-4mm, the diameter of the sand is 0.25mm-0.5mm, the ratio of the sand to the gravel is 9:5, the permeability coefficient K is 76.9m/d, and Pe is 2.68 × 102。
8. A permeable reactive barrier experimental facility for treating pollutants in groundwater according to any of claims 1 to 7, wherein a valve (36) is further provided on the pipeline between the sewage injection pump (4) and the sewage injection port (16).
9. A permeable reactive barrier experimental facility for treating pollutants in groundwater according to any of claims 1 to 7, wherein a flow meter (42) is further provided on the pipeline between the sewage injection pump (4) and the sewage injection port (16).
10. A permeable reactive barrier experimental facility for treating pollutants in groundwater according to any of claims 1 to 7, wherein a plurality of brackets (48) for fixedly mounting the reactive column (14) are further provided below the reactive column (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922178155.5U CN211496998U (en) | 2019-12-06 | 2019-12-06 | Experimental equipment for permeable reactive barrier for treating pollutants in underground water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922178155.5U CN211496998U (en) | 2019-12-06 | 2019-12-06 | Experimental equipment for permeable reactive barrier for treating pollutants in underground water |
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| CN211496998U true CN211496998U (en) | 2020-09-15 |
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| CN201922178155.5U Active CN211496998U (en) | 2019-12-06 | 2019-12-06 | Experimental equipment for permeable reactive barrier for treating pollutants in underground water |
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