Permeable reactive barrier and underground water circulation well coupling repair system

Abstract

The utility model provides a permeable reactive barrier and underground water circulation well coupling repairing system which comprises a waterproof curtain wall, a funnel guide door type permeable reactive barrier, an underground water circulation well set and a monitoring well set. The waterproof curtain wall is vertically buried and encloses the polluted groundwater area in three directions to form an enclosure area, and an opening faces the flowing direction of groundwater; a funnel guide door type permeable reactive barrier is arranged on one side, perpendicular to the flowing direction of underground water, of the waterproof curtain wall; the groundwater circulating well group comprises a plurality of groundwater circulating wells which are vertically buried in the enclosing area, and the plurality of groundwater circulating wells are distributed at intervals in the direction vertical to the flowing direction of groundwater; the monitoring well group comprises a first monitoring well and a second monitoring well which are arranged on the inner side and the outer side of the funnel guide door type permeable reactive barrier. The permeable reactive barrier and groundwater circulation well coupling repairing system can improve repairing efficiency and repairing effect of polluted groundwater.

Description

Technical Field

[0001] The utility model belongs to the technical field of groundwater pollution restoration, in particular to a permeable reaction wall and groundwater circulation well coupling restoration system. Background Art

[0002] Permeable reaction wall technology is a groundwater in-situ remediation technology that builds a permeable reaction wall filled with reaction media in the underground aquifer. When groundwater flows through the reaction wall, pollutants undergo a series of physical, chemical, and biological degradation reactions with the reaction wall, converting the pollutants in the groundwater into an environmentally acceptable form, thereby achieving the removal of pollutants. However, permeable reaction wall technology is a passive remediation technology with a long remediation cycle and limited effect. It needs to be combined with other remediation technologies to improve remediation efficiency and remediation effect.

[0003] Circulation well technology has the characteristics of small disturbance to the formation structure and simple operation, and has been widely used. It mainly drives the flow of groundwater in the aquifer through the special structure of the well pipe and the aeration / injection effect, so that a three-dimensional water flow circulation is formed in the space around the circulation well. The groundwater aquifer is continuously disturbed through the three-dimensional water flow circulation, thereby achieving the removal of volatile and semi-volatile organic pollutants in the underground aquifer. Utility Model Content

[0004] In view of this, in order to solve the above-mentioned technical problems, the utility model proposes a permeable reaction wall and groundwater circulation well coupling repair system, which combines the permeable reaction wall repair technology with the groundwater circulation well repair technology, thereby minimizing the disturbance to the stratum structure while improving the repair efficiency and repair effect of contaminated groundwater.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A permeable reaction wall and groundwater circulation well coupling repair system, comprising:

[0007] A water-blocking curtain wall is vertically buried to enclose the polluted groundwater area in three directions to form a containment area, with the opening facing the direction of groundwater flow;

[0008] A funnel-guided gate type permeable reaction wall, wherein the funnel-guided gate type permeable reaction wall is provided on one side of the waterproof curtain wall perpendicular to the groundwater flow direction;

[0009] A groundwater circulation well group, the groundwater circulation well group comprising a plurality of groundwater circulation wells vertically buried in the containment area, the plurality of groundwater circulation wells being spaced apart and distributed along a direction vertical to the groundwater flow;

[0010] A monitoring well group, the monitoring well group includes a monitoring well 1 arranged in the containment area and located between the groundwater circulation well group and the funnel-guided gate type permeable reaction wall, and a monitoring well 2 located outside the funnel-guided gate type permeable reaction wall.

[0011] The waterproof curtain wall blocks the polluted area to prevent the spread of the polluted area. The polluted groundwater is controlled in the control area of ​​the groundwater circulation well group. Under the action of multiple groundwater circulation wells, multiple three-dimensional circulation flow fields are formed, which increases the disturbance of water and removes volatile and semi-volatile organic pollutants. The groundwater treated by the groundwater circulation well group flows to the inner area of ​​the waterproof curtain wall and is repaired after being treated again by the funnel-guided permeable reaction wall. The groundwater before and after the funnel-guided permeable reaction wall is monitored by the monitoring well group.

[0012] Furthermore, the spacing between adjacent groundwater circulation wells is based on the contact of the outer edges of the vertical sections of circulating water flow formed by the two.

[0013] On the inner side of the water-facing end of the waterproof curtain wall, multiple groundwater circulation wells are set up to prevent polluted water from leaking out.

[0014] Furthermore, the funnel-guided permeable reaction wall includes a funnel-type water-blocking wall connected to the water-blocking curtain wall and a permeable wall filled with a reaction medium layer arranged on the funnel-type water-blocking wall for treating contaminated groundwater.

[0015] Furthermore, the groundwater circulation well includes a well body, a transverse partition separating the inner cavity of the well body, a circulating water pump, a suction pipe, and a water outlet pipe; the transverse partition separates the well body into an upper screen section and a lower screen section, and both the upper screen section and the lower screen section are provided with water permeable holes; the lower end of the suction pipe passes through the transverse partition and extends into the lower screen section, and the lower end of the water outlet pipe extends into the upper screen section, the water inlet of the circulating water pump is connected to the suction pipe, and the water outlet of the circulating water pump is connected to the water outlet pipe.

[0016] The pumping pipe, circulating water pump and outlet pipe can realize that the groundwater in the lower screen section is pumped out and then injected into the upper screen section. The groundwater entering the upper screen section then flows out from the water permeable holes of the upper screen section and is then pumped into the lower screen section by the pumping pipe, forming a circulating groundwater flow field.

[0017] Furthermore, the groundwater circulation well also includes a dosing unit, which includes a medicine box and a medicine pump connected to the medicine box; a mixing box is provided at a position of the water outlet pipe outside the well body, and the outlet of the medicine pump is connected to the mixing box.

[0018] The dosing unit is connected to the water outlet pipe, and the agent is sent into the mixing box to mix with the pumped groundwater. The agent is then sent into the circulation well along with the water flow and enters the circulating water flow, which is conducive to the full contact and mixing of the agent and the pollutants. The agent then flows out from the permeable holes in the upper screen section and diffuses into the aquifer, so that the agent is fully utilized.

[0019] Furthermore, it also includes a plurality of permeable reaction wall modules, and the plurality of permeable reaction wall modules are arranged one by one with the plurality of groundwater circulation wells along the arrangement direction of the groundwater circulation well group.

[0020] Furthermore, the vertical section of circulating water formed by the groundwater circulation well flows through the adjacent permeable reaction wall modules.

[0021] The water flow in the vertical direction formed by the groundwater circulation well can pass through the permeable reaction wall module, so that the groundwater to be repaired can flow from the well body into the permeable reaction wall under the driving action of the circulation well, so that the groundwater circulation well and the permeable reaction wall module can simultaneously and collaboratively treat the contaminated groundwater, thereby improving the pollutant removal effect and efficiency. The treated groundwater flows through the funnel-guided permeable reaction wall again for secondary treatment.

[0022] Compared with the prior art, the permeable reaction wall and groundwater circulation well coupling repair system described in the utility model has the following advantages:

[0023] (1) The structure design of the coupling repair system of the permeable reaction wall and the groundwater circulation well described in the utility model is reasonable. Both belong to the treatment means with little disturbance to the stratum structure. The polluted water area is enclosed by the waterproof curtain wall, and the polluted groundwater is controlled in the groundwater circulation well group area. Under the action of multiple groundwater circulation wells, multiple three-dimensional circulation flow fields are formed, which increases the disturbance to the water, and volatile and semi-volatile organic pollutants are removed. After being treated again by the funnel-guided permeable reaction wall, the polluted groundwater is repaired, thereby improving the repair efficiency and repair effect of the polluted groundwater;

[0024] (2) The permeable reaction wall and groundwater circulation well coupled repair system described in the utility model combines the groundwater circulation well technology with the permeable reaction wall technology, and utilizes the three-dimensional circulating flow field formed by the groundwater circulation well to increase the disturbance of the water flow, improve the contact efficiency between the polluted water body and the permeable reaction wall module, and improve the repair efficiency of the permeable reaction wall module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the structure in the horizontal direction of the permeable reaction wall and groundwater circulation well coupling repair system described in Example 1 of the utility model;

[0027] Figure 2 It is a schematic diagram of the structure in the vertical direction of the permeable reaction wall and groundwater circulation well coupling repair system described in Example 1 of the utility model;

[0028] Figure 3 It is a schematic diagram of the structure in the horizontal direction of the permeable reaction wall and groundwater circulation well coupling repair system described in Example 2 of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure in the vertical direction of the permeable reaction wall and groundwater circulation well coupling repair system described in Example 2 of the utility model.

[0030] Description of reference numerals:

[0031] 1-waterproof curtain wall, 2-funnel-guided permeable reaction wall, 3-enclosure area, 4-funnel-type water-proof wall, 5-permeable wall, 6-groundwater circulation well, 7-well body, 8-diaphragm, 9-circulating water pump, 10-water suction pipe, 11-water outlet pipe, 12-upper screen section, 13-lower screen section, 14-water permeable hole, 15-medicine box, 16-medicine pump, 17-mixing box, 18-monitoring well 1, 19-monitoring well 2, 20-permeable reaction wall module. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] Example 1

[0037] like Figure 1 and 2 As shown, a permeable reaction wall and groundwater circulation well coupling repair system includes a water-proof curtain wall 1, a funnel-guided permeable reaction wall 2, a groundwater circulation well group, and a monitoring well group;

[0038] The waterproof curtain wall 1 is vertically buried, enclosing the contaminated groundwater area in three directions to form a containment area 3, with the opening facing the groundwater flow direction; a funnel-guided permeable reaction wall 2 is arranged on one side of the waterproof curtain wall 1 perpendicular to the groundwater flow direction; the funnel-guided permeable reaction wall 2 includes 4 connected to the waterproof curtain wall 1 and a permeable wall 5 filled with a reaction medium layer for treating contaminated groundwater arranged on the funnel-type waterproof curtain wall 4;

[0039] The groundwater circulation well group includes a plurality of groundwater circulation wells 6 vertically buried in the containment area 3, and the plurality of groundwater circulation wells 6 are spaced apart along the vertical groundwater flow direction, and the spacing between adjacent groundwater circulation wells 6 is based on the outer edges of the vertical sections of the circulating water flow formed by the two being in contact; the groundwater circulation well 6 includes a well body 7, a diaphragm 8 separating the inner cavity of the well body 7, a circulating water pump 9, a water pumping pipe 10, a water outlet pipe 11, and a dosing unit; the diaphragm 8 separates the well body 7 into an upper screen section 12 and a lower screen section 13, and the upper screen section 14 is provided with a plurality of groundwater circulation wells 6, wherein ... The sieve section 12 and the lower sieve section 13 are both provided with water permeable holes 14; the lower end of the water pump 10 passes through the diaphragm 8 and extends into the lower sieve section 13, the lower end of the water outlet pipe 11 extends into the upper sieve section 12, the water inlet of the circulating water pump 9 is connected to the water pump 10, and the water outlet of the circulating water pump 9 is connected to the water outlet pipe 11; the drug delivery unit includes a medicine box 15 and a medicine pump 16 connected to the medicine box 15; a mixing box 17 is provided at a position of the water outlet pipe 11 located outside the well body 7, and the outlet of the medicine pump 16 is connected to the mixing box 17;

[0040] The monitoring well group includes a monitoring well 18 which is arranged in the containment area 3 and located between the groundwater circulation well group and the funnel-guided gate type permeable reaction wall 2 , and a monitoring well 19 which is located outside the funnel-guided gate type permeable reaction wall 2 .

[0041] The pollution plume flows to the containment area 3 surrounded by the waterproof curtain wall 1, and under the action of multiple groundwater circulation wells 6, multiple three-dimensional circulation flow fields are formed, which increases the disturbance to the water and removes volatile and semi-volatile organic pollutants. The groundwater treated by the groundwater circulation well group flows to the inner area of ​​the waterproof curtain wall 1, and flows out after being treated again by the funnel-guided permeable reaction wall 2. The monitoring well group monitors the water quality of the groundwater before and after flowing through the funnel-guided permeable reaction wall 2.

[0042] Example 2

[0043] like Figure 3 and 4 As shown, on the basis of Example 1, the difference from Example 1 is that it includes multiple permeable reaction wall modules 20, and the multiple permeable reaction wall modules 20 are arranged one by one with multiple groundwater circulation wells 6 along the arrangement direction of the groundwater circulation well group; the vertical section of circulating water formed by the groundwater circulation well 6 flows through the adjacent permeable reaction wall modules 20.

[0044] The three-dimensional circulating flow field formed by the groundwater circulation well 6 increases the disturbance of the water flow. At the same time, the water flow in the vertical direction can flow through the permeable reaction wall module 20, increasing the multi-directional contact between the polluted water body and the permeable reaction wall module 20, improving the contact efficiency, and realizing the coordinated treatment of contaminated groundwater by the groundwater circulation well 6 and the permeable reaction wall module 20, thereby improving the pollutant removal effect and efficiency. The treated groundwater flows through the funnel-guided permeable reaction wall 2 again for secondary treatment.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A permeable reaction wall and groundwater circulation well coupling repair system, characterized in that: include: A water-blocking curtain wall is vertically buried to enclose the polluted groundwater area in three directions to form a containment area, with the opening facing the direction of groundwater flow; A funnel-guided gate type permeable reaction wall, wherein the funnel-guided gate type permeable reaction wall is provided on one side of the water-blocking curtain wall perpendicular to the groundwater flow direction; A groundwater circulation well group, the groundwater circulation well group comprising a plurality of groundwater circulation wells vertically buried in the containment area, the plurality of groundwater circulation wells being spaced apart and distributed along a direction vertical to the groundwater flow; A monitoring well group, the monitoring well group includes a monitoring well 1 arranged in the containment area and located between the groundwater circulation well group and the funnel-guided gate type permeable reaction wall, and a monitoring well 2 located outside the funnel-guided gate type permeable reaction wall.

2. The permeable reaction wall and groundwater circulation well coupling repair system according to claim 1 is characterized in that: The spacing between adjacent groundwater circulation wells is based on the contact of the outer edges of the vertical sections of circulating water flow formed by the two.

3. The permeable reaction wall and groundwater circulation well coupling repair system according to claim 1 is characterized in that: The funnel-guided permeable reaction wall comprises a funnel-type water-blocking wall connected to a water-blocking curtain wall and a permeable wall filled with a reaction medium layer and arranged on the funnel-type water-blocking wall for treating contaminated groundwater.

4. The permeable reaction wall and groundwater circulation well coupling repair system according to claim 1 is characterized in that: The groundwater circulation well includes a well body, a transverse partition separating the inner cavity of the well body, a circulating water pump, a suction pipe, and a water outlet pipe; the transverse partition separates the well body into an upper screen section and a lower screen section, and both the upper screen section and the lower screen section are provided with water permeable holes; the lower end of the suction pipe passes through the transverse partition and extends into the lower screen section, and the lower end of the water outlet pipe extends into the upper screen section, the water inlet of the circulating water pump is connected to the suction pipe, and the water outlet of the circulating water pump is connected to the water outlet pipe.

5. The permeable reaction wall and groundwater circulation well coupled repair system according to claim 4 is characterized in that: The groundwater circulation well also includes a dosing unit, which includes a medicine box and a medicine pump connected to the medicine box; a mixing box is provided at a position of the water outlet pipe located outside the well body, and the outlet of the medicine pump is connected to the mixing box.

6. The permeable reaction wall and groundwater circulation well coupled repair system according to any one of claims 1 to 5, characterized in that: It also includes a plurality of permeable reaction wall modules, which are arranged one by one with intervals from the plurality of groundwater circulation wells along the arrangement direction of the groundwater circulation well group.

7. The permeable reaction wall and groundwater circulation well coupled repair system according to claim 6 is characterized in that: The vertical section of circulating water formed by the groundwater circulation well flows through the adjacent permeable reaction wall modules.

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