Multi-channel distributed filler reactor for in-situ remediation of contaminated site

Abstract

The utility model discloses a multi-channel distributed filler reactor for in-situ remediation of a polluted site, which comprises an upstream face shell, and one side of the upstream face shell is connected with a gravel water guide door; the water outlet surface shell is arranged outside the other side of the upstream surface shell in parallel; the permeable filler plates are detachably connected between the upstream face shell and the water outlet face shell; wherein the upstream face shell is provided with an inlet and forms a water inlet flow guide channel, the water outlet face shell is provided with an outlet and forms a water outlet flow guide channel, and any adjacent water inlet flow guide channel and water outlet flow guide channel are communicated through a permeable filler plate. The underground water pollution remediation reactor has the advantages that the reactor can be applied to underground water pollution remediation, underground water is guided to form an inverted-Y-shaped flow line through the flow guide channels, pollutants can be in full contact with active medium filler through the permeable filler plates which are arranged between the channels in a staggered mode, and the mass transfer efficiency is improved; and meanwhile, the detachable filler plate is convenient to replace in time when the active medium fails.

Description

TECHNICAL FIELD

[0001] The utility model relates to in situ remediation reactor technical field, concretely relates to a kind of for the multi-channel distributed packing reactor of contaminated site in situ remediation. BACKGROUND

[0002] At present, soil and groundwater pollution problems are increasingly serious, pollutants are not easy to diffuse and dilute in soil, and are easy to accumulate beyond standard, and groundwater pollution presents the characteristics of many points, wide range and complexity, which poses a serious threat to human health and ecological environment. As an efficient and environmentally friendly treatment method, in-situ remediation technology can directly treat the pollution site without damaging the original ecology of the site, effectively controlling the risk of secondary pollution. In-situ remediation not only effectively removes or immobilizes pollutants in soil and groundwater, but also reduces energy consumption and waste generation, significantly reduces carbon emissions during the remediation process, promotes resource conservation and recycling, and is highly consistent with the "double carbon" strategy. Therefore, in-situ remediation technology is a powerful weapon to solve current soil and groundwater pollution problems, and is also an important way to promote green and low-carbon development.

[0003] In-situ remediation technology is represented by permeable reactive barrier (PRB), which mainly fills reaction media into underground walls, so that the pollution plume passes through the reaction media, and the pollutants are converted into another form acceptable to the environment, thereby making the pollutant concentration meet the relevant water environmental quality standards. However, the existing PRB adopts a single channel mode with whole packing in the reaction zone, and the thick packing layer weakens the liquid-solid reaction between the contaminated groundwater and the active reaction medium packing, limiting the actual engineering application effect. At the same time, the one-time whole packing method also makes it difficult to replace the packing due to the fixed structure once the packing is saturated or fails, which is not only high in cost but also difficult in technology. This not only limits the long-term use effect of PRB, but also may cause the pollution problem to persist due to the inability to adjust the remediation strategy in time. UTILITY MODEL CONTENT

[0004] The utility model aims at the deficiencies of the prior art, and provides a multi-channel distributed packing reactor for in-situ remediation of contaminated sites, which guides the pollutants in groundwater to fully contact with active media through separate flow guide channels, and the detachable packing plate design facilitates timely replacement of active media when they fail, achieving improved mass transfer efficiency while ensuring long-term operation of the device.

[0005] The utility model is achieved by the following technical solutions:

[0006] A multi-channel distributed packing reactor for in-situ remediation of contaminated sites is arranged on one side of a gravel water guide door between a pair of water-sealing funnel walls, wherein the reactor comprises:

[0007] a water-facing shell connected to the gravel water gate on one side;

[0008] a water-outgoing shell arranged in parallel to the other side of the water-facing shell; and

[0009] a plurality of permeable filler plates detachably connected between the water-facing shell and the water-outgoing shell; wherein

[0010] the water-facing shell is provided with an inlet and forms a water-incoming flow channel at a position between every two adjacent permeable filler plates, the water-outgoing shell is provided with an outlet and forms a water-outgoing flow channel at a position between every two adjacent permeable filler plates between every two adjacent water-incoming flow channels, the water-incoming flow channels and the water-outgoing flow channels are staggered, and any adjacent water-incoming flow channel and water-outgoing flow channel are connected via the permeable filler plates.

[0011] Optionally, the permeable filler plate comprises:

[0012] a pair of porous wall plates connected in parallel between the water-facing shell and the water-outgoing shell;

[0013] an internal active medium filler filled in a filling space formed by a pair of the porous wall plates, the water-facing shell and the water-outgoing shell.

[0014] Optionally, the two ends of the permeable filler plate are detachably connected to the water-facing shell and the water-outgoing shell by buckles.

[0015] Optionally, the water-incoming flow channel is open at an upstream end facing the groundwater and sealed at the other end.

[0016] Optionally, the water-outgoing flow channel is open at a downstream end facing the groundwater and sealed at the other end.

[0017] Optionally, the groundwater flow line is inverted Y-shaped inside the reactor.

[0018] Optionally, each of the pair of water-sealing funnel walls comprises a horizontal wall and an inclined wall, and the gravel water gate is connected between the pair of horizontal walls and located at the intersection of the inclined wall and the horizontal wall.

[0019] Optionally, the pair of inclined walls are trumpet-shaped, gradually increasing in size from the side close to the pair of horizontal walls to the side away from the pair of horizontal walls.

[0020] Optionally, the gravel water gate, the water-facing shell, the water-outgoing shell and the pair of horizontal walls are arranged vertically, and the permeable filler plate is arranged in parallel to the pair of horizontal walls.

[0021] Optionally, the plurality of permeable filler plates are evenly distributed between the water-facing shell and the water-outlet shell.

[0022] The reactor has the advantages that:

[0023] The reactor can be applied to groundwater pollution remediation, and the groundwater is guided to form a reverse Y-shaped flow line through the flow guide channels, the pollutants flow through the permeable filler plates arranged staggeredly between the channels, the pollutants can be fully contacted with the active medium filler, the mass transfer efficiency is improved, and the detachable filler plates facilitate timely replacement when the active medium is invalid. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Fig. 1 is a structural schematic view of the reactor of the present application;

[0025] Figure 2 Fig. 2 is a structural schematic view of the permeable filler plate of the present application;

[0026] Figure 3 Fig. 3 is a structural schematic view of the filler reactor without filling the internal active medium filler in the present application;

[0027] Figure 4 Fig. 4 is a structural schematic view of the filler reactor filled with the internal active medium filler in the present application. DETAILED DESCRIPTION

[0028] In the figure, the respective marks are as follows: 1, contaminated groundwater, 2, water-sealing funnel wall, 3, gravel water guide door, 4, reactor, 5, pollution-reduced groundwater, 6, water-inlet flow guide channel, 7, water-outlet flow guide channel, 8, water-facing shell, 9, water-outlet shell, 10, permeable filler plate, 11, internal active medium, 12, buckle, 13, inlet, 14, outlet, 21, horizontal wall, 22, inclined wall, 101, porous wall plate, 102, internal active medium filler.

[0029] Embodiment: Please refer to Figure 1 and Figure 2As shown, a multi-channel distributed filler reactor for in-situ remediation of contaminated sites is shown in an embodiment, which is arranged at one side of a gravel water gate 3 between a pair of cut-off walls 2, wherein the reactor 4 comprises a water-facing shell 8, which is connected to the gravel water gate 3 at one side; a water-outgoing shell 9, which is arranged outside the other side of the water-facing shell 8; and a plurality of permeable filler plates 10, which are detachably connected between the water-facing shell 8 and the water-outgoing shell 9; wherein the water-facing shell 8 is provided with an inlet 13 and forms a water-incoming guide channel 6 at a position between every two adjacent permeable filler plates 10, the water-outgoing shell 9 is provided with an outlet 14 and forms a water-outgoing guide channel 7 at a position between every two adjacent permeable filler plates 10 between every two adjacent water-incoming guide channels 6, the water-incoming guide channels 6 and the water-outgoing guide channels 7 are staggered arranged, and any adjacent water-incoming guide channel 6 and water-outgoing guide channel 7 are communicated via the permeable filler plate 10.

[0030] In this embodiment, as shown in Figure 3 , 4 , the permeable filler plate 10 comprises a pair of porous wall plates 101, which are connected in parallel between the water-facing shell 8 and the water-outgoing shell 9; and an internal active medium filler 102, which is filled in a filling space formed by the pair of porous wall plates 101, the water-facing shell 8 and the water-outgoing shell 9.

[0031] In this embodiment, the two ends of the permeable filler plate 10 are detachably connected with the water-facing shell 8 and the water-outgoing shell 9 via buckles 12.

[0032] In this embodiment, the water-incoming guide channel 6 is open at an end facing the upstream of the groundwater and is sealed at the other end.

[0033] In this embodiment, the water-outgoing guide channel 7 is open at an end facing the downstream of the groundwater and is sealed at the other end.

[0034] In this embodiment, as shown in Figure 3 , the groundwater flow lines are in inverted Y shape inside the reactor 4.

[0035] In this embodiment, the pair of cut-off walls 2 each comprises a horizontal wall 21 and an inclined wall 22, and the gravel water gate 3 is connected between the pair of horizontal walls 21 and is located at the intersection of the inclined wall 22 and the horizontal wall 21.

[0036] In this embodiment, the pair of inclined walls 22 are in the shape of a horn gradually increasing from the side close to the pair of horizontal walls 21 to the side away from the pair of horizontal walls 21.

[0037] In this embodiment, the gravel water gate 3, the water-facing shell 8, the water-outgoing shell 9 are arranged perpendicularly to the pair of horizontal walls 21, and the permeable filler plate 10 is arranged in parallel to the pair of horizontal walls 21.

[0038] In the embodiment, the plurality of permeable filler plates 10 are evenly distributed between the water-facing shell 8 and the water-outlet shell 9.

[0039] The characteristics and functions of the present application will be further understood through the following description.

[0040] The multi-channel distributed filler reactor of the embodiment, as shown in the figure, comprises a shell (i.e., the water-facing shell 8 and the water-outlet shell 9) with longitudinal slots opened on the side, the longitudinal slots correspond to the groundwater inlet / outlet flow guide channels 6 / 7 one by one, the groundwater inlet / outlet flow guide channels 6 / 7 are staggered and separated by the permeable filler plates 10; the wall surface of the permeable filler plate 10 is of porous material and filled with granular active reaction medium 11 inside. The lateral slotted surface of the reactor should be perpendicular to the groundwater flow direction. Figure 3

[0041] The permeable filler plate 10 is installed in the reactor in the form of a buckle 12, and a single filler plate can be integrally removed for replacement of the internal reaction medium. The width ratio of the flow guide channel 6 / 7 to the permeable filler plate 10 is 1:1~1:3, which should be selected according to the characteristics of the reaction medium and the degree of pollution.

[0042] The particle size of the reaction medium 11 should be greater than 2mm to ensure that the porosity and permeability coefficient of the overall reactor are greater than that of the aquifer medium. The reaction medium can be selected according to the site pollution characteristics, including but not limited to zero-valent metal, activated carbon, biochar, oxygen-releasing compound, microorganism, zeolite, etc.

[0043] The multi-channel distributed filler reactor 4 of the embodiment is installed after the gravel water guide gate 3, and there are two inclined water-sealed funnel walls 2 on both sides of the water guide gate, which are steel sheet piles or mud walls, and the depth should be inserted into the water-sealed layer. The funnel wall guides the contaminated groundwater 1 to collect and then pass through the gravel water guide gate to filter large particle substances before entering the multi-channel distributed filler reactor, and uses the active medium to remove pollutants.

[0044] The reactor of the embodiment as a whole comprises a groundwater inlet flow guide channel 6, a groundwater outlet flow guide channel 7, and a permeable filler plate 10 separating the two. The permeable filler plate 10 is fixed in the shell by a buckle 12. After the contaminated groundwater flows into the inlet flow guide channel 6 through the narrow slot 13 on the water-facing shell 8, it penetrates into the permeable filler plate 10 through the porous wall plate on the side, reacts with the internal active medium 11, and the reduced amount of contaminated groundwater after the reaction is discharged into the adjacent outlet flow guide channel 7 and then into the external underground environment.

[0045] ​The permeable filler plate 10 is composed of a porous wall plate 101 and an internal active medium filler 102, and the filler plate is distributed with an inlet water guide channel 6 and an outlet water guide channel 7 on both sides, the inlet water guide channel 6 is opened at one end facing the upstream of the groundwater and is sealed at the other end; the outlet water guide channel 7 is opened at one end facing the downstream of the groundwater and is sealed at the other end. The groundwater flow line is in inverted Y shape in the reactor.

[0046] The working principle of the reactor of the embodiment is as follows:

[0047] Referring to FIGS. 1, 2 and 3, Figure 1 and Figure 2 As shown, the contaminated groundwater 1 is converged by the inclined wall 22 to the horizontal wall 21, and enters the reactor 4 through the gravel water guide door 3, then enters the inlet water guide channel 6 through the inlet 13, and flows to the outlet water guide channel 7 through the permeable filler plate 10 to the right or to the left, and finally the groundwater 5 with reduced pollution flows to the outside from the outlet 14.

[0048] In summary, the reactor can be applied to groundwater pollution remediation, the groundwater is guided to form an inverted Y-shaped flow line through the guide channel, the pollutants flow through the permeable filler plate arranged staggered between the channels, so that the pollutants can be fully contacted with the active medium filler, and the mass transfer efficiency is improved; and the detachable filler plate design facilitates timely replacement when the active medium is invalid.

[0049] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model, and for those skilled in the art, it should be realized that the solutions obtained by equivalent replacement and obvious changes of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. A multi-channel distributed packing reactor for in-situ remediation of contaminated sites, arranged on one side of a gravel water gate located between a pair of water cutoff funnel walls, characterized in that, The reactor comprises: a water-facing shell connected to the gravel water gate on one side; a water-outflowing shell arranged in parallel to the other side of the water-facing shell; and a plurality of permeable filler plates detachably connected between the water-facing shell and the water-outflowing shell; wherein the water-facing shell is provided with an inlet and forms a water-inflowing guide channel at a position between every two adjacent permeable filler plates, the water-outflowing shell is provided with an outlet and forms a water-outflowing guide channel at a position between every two adjacent permeable filler plates between every two adjacent water-inflowing guide channels, the water-inflowing guide channels and the water-outflowing guide channels are staggered, and any adjacent water-inflowing guide channel and water-outflowing guide channel are connected via the permeable filler plate.

2. The multi-channel distributed packing reactor for in-situ remediation of contaminated sites according to claim 1, characterized in that, The permeable filler plate comprises: a pair of porous wall plates connected in parallel between the water-facing shell and the water-outflowing shell; an internal active medium filler filled in a filling space formed by the pair of porous wall plates, the water-facing shell and the water-outflowing shell.

3. The multi-channel distributed packing reactor for in-situ remediation of contaminated sites according to claim 2, characterized in that, The two ends of the permeable filler plate are detachably connected to the water-facing shell and the water-outflowing shell by buckles.

4. The multi-channel distributed packing reactor for in-situ remediation of contaminated sites according to claim 3, characterized in that, The water-inflowing guide channel is open at an upstream end facing the groundwater and sealed at the other end.

5. The multi-channel distributed packing reactor for in-situ remediation of contaminated sites according to claim 4, characterized in that, The water-outflowing guide channel is open at a downstream end facing the groundwater and sealed at the other end.

6. The multi-channel distributed packing reactor for in-situ remediation of contaminated sites according to claim 5, characterized in that, The groundwater flow line is in the shape of an inverted Y inside the reactor.

7. The multi-channel distributed packing reactor for in situ remediation of contaminated sites according to claim 6, characterized in that, The pair of water-sealing funnel walls each comprises a horizontal wall and an inclined wall, and the gravel water gate is connected between the pair of horizontal walls at the intersection of the inclined wall and the horizontal wall.

8. The multi-channel distributed packing reactor for in situ remediation of contaminated sites according to claim 7, characterized in that, The pair of inclined walls are in the shape of a horn gradually increasing from the side close to the pair of horizontal walls to the side away from the pair of horizontal walls.

9. The multi-channel distributed packing reactor for in situ remediation of contaminated sites according to claim 8, characterized in that, The gravel water gate, the water-facing shell, the water-outflowing shell and the pair of horizontal walls are arranged perpendicularly, and the permeable filler plate is arranged in parallel to the pair of horizontal walls.

10. The multi-channel distributed packing reactor for in-situ remediation of contaminated sites according to claim 9, characterized in that, The plurality of permeable filler plates are evenly distributed and connected between the water-facing shell and the water-outflowing shell.

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