System for repairing polluted underground water through combination of circulating well and injection well

Abstract

The utility model discloses a circulating well and injection well combined polluted underground water remediation system which comprises a circulating well and a plurality of injection wells arranged around the circulating well, the circulating well is connected with an underground water filtering device through a water suction pump, an outlet of the underground water filtering device is connected with a water outlet pipe, and the water outlet pipe is provided with an ozone inlet and a hydrogen peroxide adding port. The other end of the water outlet pipe is connected with a first distributive pipe and a second distributive pipe, the first distributive pipe and the second distributive pipe are provided with pipeline flow mixers, the other ends of the first distributive pipe and the second distributive pipe are connected with a first preparation tank and a second preparation tank respectively, and the first preparation tank and the second preparation tank are used for preparing different repairing agents. The first preparation tank and the second preparation tank are respectively connected with the circulating well and the plurality of injection wells. The underground water in the circulating well can be extracted, different repairing agents are prepared after filtering and primary treatment, circulation of the underground water is achieved through the multiple screen pipe sections of the circulating well and the multi-stage injection well, and the repairing effect is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of groundwater remediation, especially to a system for remediation of contaminated groundwater by combination of a circulation well and an injection well. BACKGROUND

[0002] At present, the rapid development of economy and society also brings more and more environmental problems, and the soil and groundwater pollution problem is particularly serious. The remediation methods of organic contaminated sites and groundwater mainly include in-situ remediation and ex-situ remediation, and the in-situ remediation has small environmental disturbance and low cost, and has more obvious advantages. The traditional in-situ remediation technology of groundwater usually adopts single biological remediation or chemical remediation, wherein the chemical remediation uses a large amount of remediation agents, which is easy to cause secondary pollution, and the biological remediation has a long remediation period and poor remediation effect. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the utility model is to provide a system for remediation of contaminated groundwater by combination of a circulation well and an injection well, aiming at solving the technical problems of large amount of remediation agents, easy to cause secondary pollution, long remediation period and poor remediation effect in the prior art by using single biological remediation or chemical remediation.

[0004] The technical scheme of the utility model is: a system for remediation of contaminated groundwater by combination of a circulation well and an injection well, comprising a circulation well, a plurality of injection wells arranged around the circulation well, a groundwater filter device connected to the circulation well through a water pump, an outlet of the groundwater filter device connected to a water outlet pipe, an ozone inlet and a hydrogen peroxide adding port provided on the water outlet pipe, the other end of the water outlet pipe connected to a first water distribution pipe and a second water distribution pipe respectively, a pipeline flow mixer provided on the first water distribution pipe and the second water distribution pipe respectively, the other end of the first water distribution pipe and the second water distribution pipe respectively connected to a first preparation tank and a second preparation tank, the first preparation tank and the second preparation tank used for preparing different remediation agents, the first preparation tank and the second preparation tank connected to the circulation well and the plurality of injection wells respectively.

[0005] Further, the water pump is connected with a water pumping pipe, and the water pumping pipe extends to the bottom of the circulation well.

[0006] Further, the groundwater filter device comprises a device body, a water outlet and a water inlet provided at the upper and lower ends of the device body respectively, and a coarse filter screen, a lower gravel layer, a middle gravel layer and an upper gravel layer provided in the device body from bottom to top, and the particle sizes of the three gravel layers gradually decrease from bottom to top.

[0007] Further, the groundwater filter device is detachably connected with the water pump and the water outlet pipe.

[0008] Furthermore, the pipe mixer of this utility model includes an inlet module, an intermediate module, and an outlet module connected in sequence. The inlet module and the outlet module are respectively provided with spiral blades distributed spirally along the pipe wall. The intermediate module has multiple corrugated plates arranged vertically along the water flow direction. The corrugated plates are fixedly connected to the pipe wall of the intermediate module.

[0009] Furthermore, in this utility model, a sealing ring is provided between two adjacent modules of the pipe mixer, and the two adjacent modules of the pipe mixer are connected by a flange or clamp.

[0010] Furthermore, in this utility model, the inner diameter of the water inlet module gradually decreases from its outlet to its inlet, while the inner diameter of the water outlet module gradually increases from its inlet to its outlet.

[0011] Furthermore, in this utility model, the first preparation tank is connected to a first medicine tank, and the first preparation tank is also connected to a first main outlet pipe, which is connected to the circulation well and the multiple injection wells respectively through multiple first distribution pipes; the second preparation tank is connected to a second medicine tank, and the second preparation tank is also connected to a second main outlet pipe, which is connected to the circulation well and the multiple injection wells respectively through multiple second distribution pipes.

[0012] Furthermore, the circulation well and the injection well in this invention are respectively provided with at least two and at least three screen pipe sections.

[0013] Compared with the prior art, this utility model has the following advantages: The remediation system of this utility model can extract groundwater from the circulation well, filter it, and then use it to prepare remediation agents. The filtered groundwater is first treated by adding ozone and hydrogen peroxide to remove organic pollutants from the water body, and then fully mixed using a pipe mixer to improve the pollutant removal capacity. The treated groundwater is then diverted to prepare different remediation agents. During the remediation process, the required remediation agents can be selected and injected into the circulation well and multi-stage injection well respectively. The circulation of groundwater is achieved by using the multi-screen pipe sections of the circulation well and multi-stage injection well, thereby greatly improving the remediation effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the system of this utility model;

[0015] Figure 2 This is a schematic diagram of the specific structure of the groundwater filtration device described in this utility model;

[0016] Figure 3 This is a schematic diagram of the specific structure of the pipe mixer described in this utility model.

[0017] Wherein: 1, circulating well; 2, injection well; 3, water pump; 3a, pumping pipe; 4, groundwater filter device; 401, device body; 401a, water inlet; 401b, water outlet; 402, coarse filter screen; 403, lower sand layer; 404, middle sand layer; 405, upper sand layer; 5, water outlet pipe; 6, ozone inlet; 7, hydrogen peroxide adding port; 8, first water distribution pipe; 9, second water distribution pipe; 10, pipeline flow mixer; 1001, water inlet end module; 1002, intermediate module; 1003, water outlet end module; 1004, spiral blade; 1005, corrugated plate; 11, first preparation tank; 12, second preparation tank; 13, first medicament tank; 14, first total liquid outlet pipe; 15, first liquid distribution pipe; 16, second medicament tank; 17, second total liquid outlet pipe; 18, second liquid distribution pipe; 19, screen pipe section. DETAILED DESCRIPTION

[0018] The specific embodiments of the system for repairing contaminated groundwater by combining a circulating well and an injection well according to the present application will be described in detail below with reference to the accompanying drawings.

[0019] Embodiment:

[0020] The specific embodiments of the system for repairing contaminated groundwater by combining a circulating well and an injection well according to the present application will be described in detail below with reference to the accompanying drawings. Figure 1 It mainly comprises a circulating well 1 and a plurality of injection wells 2 arranged around the circulating well 1. In this embodiment, the injection wells 2 are two, but the number is not limited to two and can be greater than two according to actual conditions.

[0021] The circulating well 1 is connected with a groundwater filter device 4 through a water pump 3, and the water pump 3 is connected with a pumping pipe 3a which extends to the bottom of the circulating well 1.

[0022] According to the above Figure 2 The groundwater filter device 4 comprises a device body 401, and the upper and lower ends of the device body 401 are respectively provided with a water outlet 401b and a water inlet 401a, and the water inlet 401a is connected with the water pump 3. The device body 401 is sequentially provided with a coarse filter screen 402, a lower sand layer 403, a middle sand layer 404 and an upper sand layer 405 from bottom to top, and the particle sizes of the three layers of sand gradually decrease from bottom to top. The coarse filter screen 402 is used for removing large-particle impurities, and the three layers of sand are used for removing suspended solids, colloidal particles and part of microorganisms.

[0023] The water outlet 401b of the groundwater filter device 4 is connected with a water outlet pipe 5, and the water outlet pipe 5 is provided with an ozone inlet 6 and a hydrogen peroxide adding port 7. The filtered groundwater is output through the water outlet pipe 5, and ozone and hydrogen peroxide are added into the water through the ozone inlet 6 and the hydrogen peroxide adding port 7 respectively. Hydroxyl radicals can be generated by combining hydrogen peroxide and ozone, and the organic pollutants in the water body can be oxidized and degraded by using the hydroxyl radicals, so that the organic pollutants in the water body can be effectively removed.

[0024] In this embodiment, the groundwater filtering device 4 is detachably connected with the water pump 3 and the water outlet pipe 5, which is convenient for replacement after long-term use and ensures the filtering effect.

[0025] The other end of the water outlet pipe 5 is respectively connected with the first branch pipe 8 and the second branch pipe 9, and the first branch pipe 8 and the second branch pipe 9 are respectively provided with a pipeline mixing device 10. Figure 3 The pipeline mixing device 10 comprises a water inlet end module 1001, an intermediate module 1002 and a water outlet end module 1003 connected in sequence, and the water inlet end module 1001 and the water outlet end module 1003 are respectively provided with helical blades 1004 distributed in a helical shape along the pipe wall. The intermediate module 1002 is provided with a plurality of corrugated plates 1005 arranged in the water flow direction and fixedly connected with the pipe wall of the intermediate module 1002. The water in the water outlet pipe 5 flows into the first branch pipe 8 and the second branch pipe 9, and is mixed by the pipeline mixing device 10. The water enters the water inlet end module 1001, flows out of the water outlet end module 1003 after passing through the intermediate module 1002, and the helical blades 1004 can make the water body produce rotational motion and increase the turbulent flow, and the corrugated plates 1005 can divide and recombine the water body to enhance the mixing effect.

[0026] A sealing ring is arranged between the adjacent two modules of the pipeline mixing device 10 to avoid leakage. The adjacent two modules of the pipeline mixing device 10 are connected through flanges or clamps, which is convenient for disassembly and maintenance.

[0027] The inner diameter of the water inlet end module 1001 gradually decreases in the direction from the outlet to the inlet, and the inner diameter of the water outlet end module 1003 gradually increases in the direction from the inlet to the outlet, which can enhance the mixing effect.

[0028] The other end of the first branch pipe 8 and the second branch pipe 9 is respectively connected with a first preparation tank 11 and a second preparation tank 12, and the first preparation tank 11 and the second preparation tank 12 are used for preparing different remediation agents. The first preparation tank 11 is connected with a first agent tank 13, and the first preparation tank 11 is also connected with a first total liquid outlet pipe 14, and the first total liquid outlet pipe 14 is connected with the circulation well 1 and a plurality of injection wells 2 through a plurality of first branch liquid pipes 15. The second preparation tank 12 is connected with a second agent tank 16, and the second preparation tank 12 is also connected with a second total liquid outlet pipe 17, and the second total liquid outlet pipe 17 is connected with the circulation well 1 and a plurality of injection wells 2 through a plurality of second branch liquid pipes 18.

[0029] In addition, two screen pipe sections 19 are arranged on the circulation well 1, and the two screen pipe sections 19 are respectively located at the upper part and the lower part of the circulation well 1. Three screen pipe sections 19 are arranged on the injection well 2, and the three screen pipe sections 19 are used for realizing the dosing of the groundwater and forming a three-dimensional circulation for the groundwater remediation.

[0030] In the repair, the required repair reagent can be selected, the corresponding repair reagent is injected into the circulating well 1 and the multi-stage injection well 2 respectively by using the first preparation tank 11 or the second preparation tank 12, and the circulation of underground water is realized by using the multi-screen pipe sections of the circulating well 1 and the multi-stage injection well 2, so that the repair effect is greatly improved.

[0031] Of course, the above-mentioned embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any modification made according to the spirit and essence of the main technical scheme of the present application should be covered within the protection scope of the present application.

Claims

1. A system for remediating contaminated groundwater using a combination of circulating wells and injection wells, characterized in that: The application relates to a groundwater remediation system, which comprises a circulating well (1), a plurality of injection wells (2) arranged around the circulating well (1), a groundwater filtering device (4) connected with the circulating well (1) through a water pumping device (3), an outlet of the groundwater filtering device (4) connected with a water outlet pipe (5), an ozone inlet (6) and a hydrogen peroxide adding port (7) arranged on the water outlet pipe (5), the other end of the water outlet pipe (5) connected with a first water distribution pipe (8) and a second water distribution pipe (9) respectively, a pipeline flow mixer (10) arranged on the first water distribution pipe (8) and the second water distribution pipe (9) respectively, the other end of the first water distribution pipe (8) and the second water distribution pipe (9) connected with a first preparation tank (11) and a second preparation tank (12) respectively, the first preparation tank (11) and the second preparation tank (12) used for preparing different remediation agents, and the first preparation tank (11) and the second preparation tank (12) connected with the circulating well (1) and the plurality of injection wells (2) respectively.

2. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 1, wherein: The water pumping device (3) is connected with a water pumping pipe (3a) which extends to the bottom of the circulating well (1).

3. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 1, wherein: The groundwater filtering device (4) comprises a device body (401), the upper and lower ends of the device body (401) are respectively provided with a water outlet (401b) and a water inlet (401a), and the device body (401) is sequentially provided, from bottom to top, with a coarse filter screen (402), a lower sand layer (403), a middle sand layer (404) and an upper sand layer (405), the particle sizes of the three sand layers gradually decrease from bottom to top.

4. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 1, wherein: The groundwater filtering device (4) is detachably connected with the water pumping device (3) and the water outlet pipe (5).

5. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 1, wherein: The pipeline flow mixer (10) comprises a water inlet end module (1001), an intermediate module (1002) and a water outlet end module (1003) which are sequentially connected, the water inlet end module (1001) and the water outlet end module (1003) are respectively provided with helical blades (1004) which are helically arranged along the pipe wall, the intermediate module (1002) is provided with a plurality of corrugated plates (1005) which are arranged along the water flow direction and are arranged in an upper and lower manner, and the corrugated plates (1005) are fixedly connected with the pipe wall of the intermediate module (1002).

6. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 5, wherein: Sealing rings are arranged between adjacent two modules of the pipeline flow mixer (10), and the adjacent two modules of the pipeline flow mixer (10) are connected through flanges or clamps.

7. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 5, wherein: The inner diameter of the water inlet end module (1001) gradually decreases in the direction from the outlet to the inlet, and the inner diameter of the water outlet end module (1003) gradually increases in the direction from the inlet to the outlet.

8. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 1, wherein: The first preparation tank (11) is connected with a first medicament tank (13), and is also connected with a first total liquid outlet pipe (14) which is connected with the circulation well (1) and the injection wells (2) through a plurality of first branch liquid pipes (15); the second preparation tank (12) is connected with a second medicament tank (16), and is also connected with a second total liquid outlet pipe (17) which is connected with the circulation well (1) and the injection wells (2) through a plurality of second branch liquid pipes (18).

9. The system for remediating contaminated ground water using a combination of a cycle well and an injection well according to claim 1, wherein: At least two and at least three screen pipe sections (19) are respectively arranged on the circulation well (1) and the injection wells (2).

Images