Underground water remediation device and method

Abstract

The invention discloses an underground water remediation device and method, and belongs to the technical field of underground water purification, the underground water remediation device comprises a deep well and a plurality of seepage wells circularly distributed on the periphery of the deep well, a first water suction pump is arranged in the deep well, a water outlet pipe is communicated with the upper portion of the first water suction pump, and the tail end of the water outlet pipe is communicated with a reservoir; the drainage end of the reservoir is communicated with a settling tank, the tail end of the settling tank is communicated with a resin filtering device, the drainage end of the resin filtering device is communicated with a reverse osmosis device through a communicating pipe, and the drainage end of the reverse osmosis device is drained into the seepage well through a drainage pipe. The repair device and method can effectively improve the filtration efficiency of the reverse osmosis membrane, improve the purification effect of the reverse osmosis membrane on underground water, avoid scaling and pollution on the surface of the reverse osmosis membrane, and prolong the service life of the reverse osmosis membrane.

Description

Technical Field

[0001] This invention relates to the field of groundwater purification technology, specifically to a groundwater remediation device and method. Background Technology

[0002] Groundwater pollution refers to the phenomenon where harmful substances seep into aquifers due to human activities or natural processes, damaging water quality and threatening the ecosystem and drinking water safety. Major sources of pollution include industrial leaks (heavy metals, organic solvents), agricultural seepage (nitrates, pesticides), domestic sewage discharge (pathogens, COD), and geological leaching (arsenic, fluoride). Pollutants spread with groundwater flow and are influenced by hydrogeological and physicochemical properties; for example, chlorinated hydrocarbons, due to their high density, agglomerate into difficult-to-treat DNAPL layers. Groundwater pollution is highly concealed, has a long remediation period, and can cause health risks such as cancer and poisoning. Comprehensive treatment is required through monitoring and early warning, source control, and in-situ remediation (such as biological treatment and reactive barriers) or ex-situ technologies (reverse osmosis, ion exchange).

[0003] Reverse osmosis membranes have a deep and broad-spectrum purification capability for purifying groundwater. They can simultaneously and efficiently remove heavy metals, organic pollutants, pathogenic microorganisms, nitrates, and fluorides, and produce water that stably meets drinking water standards. However, if groundwater is directly filtered through reverse osmosis membranes, the surface of the reverse osmosis membrane tubes is prone to scaling and organic contamination, resulting in poor filtration performance, low filtration efficiency, and short lifespan of the reverse osmosis membrane. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a groundwater remediation device and method.

[0005] The technical solution of the present invention is: a groundwater remediation device and method, comprising a deep well and a plurality of seepage wells arranged in a circular pattern around the deep well. A pump is installed in the deep well, and a water outlet pipe is connected above the pump. The end of the water outlet pipe is connected to a water storage tank. The drainage end of the water storage tank is connected to a settling tank. The end of the settling tank is connected to a resin filter. The drainage end of the resin filter is connected to a reverse osmosis device through a connecting pipe. The drainage end of the reverse osmosis device is discharged into the seepage well through a drainage pipe.

[0006] Furthermore, the inner wall and bottom of the seepage well are provided with multiple seepage holes, each seepage hole is provided with a seepage pipe, and the seepage pipe is provided with several water seepage holes.

[0007] Explanation: The seepage area and seepage efficiency of the seepage well are increased by using seepage pipes.

[0008] Furthermore, the settling tank includes a tank body, a plurality of settling pipes are provided below the tank body, a control valve is provided at the lower end of the settling pipes, two surface flow purification structures are provided on the tank body between two settling pipes, and an aeration mechanism is provided between the two surface flow purification structures.

[0009] Explanation: Suspended solids in groundwater are collected through sedimentation pipes, and then the organic matter in the groundwater is oxidized and degraded by an aeration device. The surface flow purification structure removes nitrogen and phosphorus from the polluted groundwater and utilizes microorganisms to decompose the organic matter.

[0010] Furthermore, the surface flow purification structure includes a soil layer laid at the bottom of the tank, a quartz sand layer above the soil layer, a gravel layer above the quartz sand layer, a vegetation layer above the gravel layer, baffles fixed to the tank on both sides of the soil layer, quartz sand layer, gravel layer, and vegetation layer, and an overflow hole above the baffles.

[0011] Explanation: The soil layer provides nutrients for plant growth, the quartz sand layer simulates a moist riverbed, and the gravel layer covers the quartz sand layer to prevent the quartz sand from migrating with the water flow.

[0012] Furthermore, the aeration mechanism includes two rotating seats respectively located on the front and rear side walls of the tank, and a rotating shaft is rotatably connected between the two rotating seats. A waterwheel for aeration is provided on the rotating shaft.

[0013] Explanation: Aeration water trucks increase the oxygen content in water, thereby enhancing the degradation efficiency of organic matter in wastewater.

[0014] Furthermore, the bottom of the water storage tank is provided with a microporous aeration pipe, and the air inlet end of the microporous aeration pipe is connected to an ozone generator through an air supply pipe.

[0015] Explanation: Ozone is introduced through microporous aeration pipes to enhance the oxidation capacity of groundwater, thereby improving the efficiency of organic matter degradation.

[0016] Furthermore, the resin filtration device includes a filter shell, the top of which is connected to the end of the settling tank, and a second water pump is provided at the bottom of the filter shell. The outlet of the second water pump is connected to the connecting pipe. The filter shell is provided with three filter screens, and a sodium ion exchange resin particle layer, a chelating resin particle layer, and an anti-fouling resin particle layer are respectively placed on the three filter screens.

[0017] Explanation: Removing Ca from water through ion exchange. 2+ and Mg 2+This prevents scaling on the reverse osmosis membrane. The chelating resin particles remove heavy metal ions from wastewater by forming stable coordination bonds with metal ions through functional groups. The antifouling resin particles capture organic molecules through van der Waals forces, and are particularly efficient at adsorbing lipophilic macromolecules.

[0018] Furthermore, the reverse osmosis device includes a permeation chamber, the top of which is connected to the end of the connecting pipe. Multiple reverse osmosis membrane tubes are inserted and connected to the top of the reverse osmosis chamber. The top of the reverse osmosis membrane tubes is threadedly connected to the top of the reverse osmosis chamber. A branch pipe is connected to the top of the reverse osmosis membrane tubes. The end of the branch pipe is connected to a main pipe. The end of the main pipe is connected to a water suction pump. The outlet of the water suction pump is connected to a drainage chamber. One side of the drainage chamber is connected to the inlet of multiple drainage pipes.

[0019] Explanation: The groundwater is further purified through a reverse osmosis membrane. The outlet is connected to a drainage chamber, and the water in the drainage chamber is then diverted to multiple seepage wells through a drainage pipe.

[0020] Furthermore, a groundwater remediation method, based on the aforementioned groundwater remediation device, is characterized by comprising the following steps:

[0021] S1. The deep well water is pumped out to the outlet pipe by the water pump and discharged into the water storage tank through the water pump. The water in the water storage tank flows into the settling tank, where impurities and suspended solids are separated by gravity.

[0022] S2. After treatment in the settling tank, the water is discharged into the resin filtration device. Under the influence of gravity, the groundwater flows in from above and out from below the resin filtration device, removing calcium from the groundwater through three different types of resin particles. 2+ / Mg 2+ Heavy metal ions and organic matter;

[0023] S3. The groundwater treated by the resin filtration device is discharged into the reverse osmosis device through the connecting pipe. The reverse osmosis device filters the groundwater, and the filtered groundwater is discharged into the seepage well through the drainage pipe so that the treated groundwater can seep back into the ground.

[0024] The beneficial effects of this invention are:

[0025] This invention extracts groundwater from deep wells to the surface, then treats it. The invention uses a settling tank to settle suspended solids in the groundwater, a surface flow purification structure and an aeration mechanism to oxidize and degrade organic matter, and finally a reverse osmosis membrane for final purification. The repair device and method of this invention can effectively improve the filtration efficiency of the reverse osmosis membrane, enhance its purification effect on groundwater, prevent scaling and contamination on the membrane surface, and extend the membrane's service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3 This is a schematic diagram of the settling tank of the present invention.

[0029] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0030] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0031] Figure 6 This is a schematic diagram of the structure of the resin filtration device of the present invention.

[0032] Figure 7 This is a schematic diagram of the reverse osmosis device of the present invention.

[0033] Among them, 1-deep water well, 2-seepage well, 3-pump 1, 4-storage tank, 5-sedimentation tank, 6-resin filter device, 7-connecting pipe, 8-reverse osmosis device, 9-drainage pipe, 21-seepage hole, 22-seepage pipe, 23-seepage hole, 51-tank body, 52-sedimentation pipe, 53-control valve, 54-surface flow purification structure, 55-aeration mechanism, 541-soil layer, 542-quartz sand layer, 543-gravel layer, 544-vegetation layer, 5 45-Baffle, 546-Overflow hole, 551-Rotating seat, 552-Rotating shaft, 553-Water-cart, 41-Microporous aeration pipe, 42-Ozone generator, 61-Filter shell, 62-Water pump II, 63-Filter screen, 64-Sodium ion exchange resin particle layer, 65-Chlorinated resin particle layer, 66-Antifouling resin particle layer, 81-Permeation chamber, 82-Reverse osmosis membrane tube, 83-Branch pipe, 84-Main pipe, 85-Suction pump, 86-Drainage chamber. Detailed Implementation

[0034] Example 1:

[0035] like Figure 1As shown, a groundwater remediation device and method includes a deep well 1 and a plurality of circular seepage wells 2 distributed around the deep well 1. A pump 3 is installed in the deep well 1. A water outlet pipe 31 is connected above the pump 3. The end of the water outlet pipe 31 is connected to a water storage tank 4. The drainage end of the water storage tank 4 is connected to a settling tank 5. The end of the settling tank 5 is connected to a resin filter device 6. The drainage end of the resin filter device 6 is connected to a reverse osmosis device 8 through a connecting pipe 7. The drainage end of the reverse osmosis device 8 is discharged into the seepage well 2 through a drainage pipe 9.

[0036] like Figure 3 As shown, the settling tank 5 includes a tank body 51, with multiple settling pipes 52 below the tank body 51. A control valve 53 is provided at the lower end of each settling pipe 52. Two surface flow purification structures 54 are provided on the tank body 51 between two settling pipes 52, and an aeration mechanism 55 is provided between the two surface flow purification structures 54.

[0037] Suspended solids in the groundwater are collected through the settling pipe 52, and then the organic matter in the groundwater is oxidized and degraded by the aeration device 55. The polluted groundwater is denitrified and phosphorus removed by the surface flow purification structure 54, and the organic matter is decomposed by microorganisms.

[0038] like Figure 4 As shown, the surface flow purification structure 54 includes a soil layer 541 laid at the bottom of the tank 51, a quartz sand layer 542 above the soil layer 541, a gravel layer 543 above the quartz sand layer 542, a vegetation layer 544 above the gravel layer 543, and baffles 545 fixed to the tank 51 on both sides of the soil layer 541, quartz sand layer 542, gravel layer 543, and vegetation layer 544. An overflow hole 546 is provided above the baffles 545.

[0039] Soil layer 541 provides nutrients for plant growth, quartz sand layer 542 simulates a wet riverbed, and gravel layer 543 covers quartz sand layer 542 to prevent quartz sand from migrating with the water flow.

[0040] like Figure 5 As shown, the aeration mechanism 55 includes two rotating seats 551 respectively located on the front and rear side walls of the tank 51. A rotating shaft 552 is rotatably connected between the two rotating seats 551, and a waterwheel 553 for aeration is provided on the rotating shaft 552.

[0041] The 553 aeration water truck increases the oxygen content in the water, thereby enhancing the degradation efficiency of organic matter in wastewater.

[0042] like Figure 6As shown, the resin filtration device 6 includes a filter shell 61. The top of the filter shell 61 is connected to the end of the settling tank 5. A second water pump 62 is provided at the bottom of the filter shell 61. The outlet of the second water pump 62 is connected to the connecting pipe 7. Three filter screens 63 are provided inside the filter shell 61. A sodium-type ion resin particle layer 64, a chelating resin particle layer 65, and an anti-fouling resin particle layer 66 are respectively placed on the three filter screens 63.

[0043] Removing Ca from water through ion exchange 2+ and Mg 2+ This prevents scaling on the reverse osmosis membrane. The chelating resin particles remove heavy metal ions from wastewater by forming stable coordination bonds with metal ions through functional groups. The antifouling resin particles capture organic molecules through van der Waals forces, and are particularly efficient at adsorbing lipophilic macromolecules.

[0044] like Figure 7 As shown, the reverse osmosis device 8 includes a reverse osmosis chamber 81. The top of the reverse osmosis chamber 81 is connected to the end of the connecting pipe 7. Multiple reverse osmosis membrane tubes 82 are inserted and connected to the top of the reverse osmosis chamber 81. The top of the reverse osmosis membrane tubes 82 is threadedly connected to the top of the reverse osmosis chamber 81. The top of the reverse osmosis membrane tubes 82 is connected to a branch pipe 83. The end of the branch pipe 83 is connected to a main pipe 84. The end of the main pipe 84 is connected to a water suction pump 85. The outlet of the water suction pump 85 is connected to a drain chamber 86. One side of the drain chamber 86 is connected to the inlet of multiple drain pipes 9.

[0045] The groundwater is further purified by reverse osmosis membrane, and the outlet is connected to the drainage chamber 86. The water in the drainage chamber 86 is then diverted to multiple seepage wells 2 through the drainage pipe 9.

[0046] Example 2:

[0047] The difference between this embodiment and embodiment 1 is that, in this embodiment, as Figure 2 As shown, the inner wall and bottom of the seepage well 2 are provided with multiple seepage holes 21, and seepage pipes 22 are provided inside the seepage holes 21. Several seepage holes 23 are provided on the seepage pipes 22.

[0048] Compared to Example 1, this embodiment expands the seepage area and seepage efficiency of the seepage well 2 by using the seepage pipe 22.

[0049] Example 3:

[0050] The difference between this embodiment and embodiment 2 is that, in this embodiment, the bottom of the water storage tank 4 is provided with a microporous aeration pipe 41, and the air inlet end of the microporous aeration pipe 41 is connected to an ozone generator 42 through an air supply pipe.

[0051] Compared to Example 2, in this embodiment, ozone is introduced through the microporous aeration pipe 41 to enhance the oxidation capacity of groundwater, thereby improving the efficiency of organic matter degradation.

[0052] Example 4:

[0053] This embodiment provides a groundwater remediation method based on a groundwater remediation device in Embodiment 3 above, including the following steps:

[0054] S1. Groundwater from a deep well is pumped out to an outlet pipe 31 by a pumping pump 3 and discharged into a reservoir 4 through the pumping pipe. The water in the reservoir 4 flows into a settling tank 5, where impurities and suspended solids are separated by gravity. Ozone is introduced into the reservoir 4 through a microporous aeration pipe 41 to improve the oxidation efficiency of organic matter in the groundwater. The length of the settling tank 5 can be determined according to the severity of the groundwater pollution. Suspended solids in the groundwater enter the settling pipe 52 under the action of gravity. The surface flow purification structure 54 simulates a surface flow wetland environment to effectively remove organic matter, nitrogen, and phosphorus from the groundwater.

[0055] S2. After treatment in settling tank 5, the water is discharged into resin filtration device 6. Under the influence of gravity, the groundwater flows in from above and out from below the resin filtration device 6, removing Ca from the groundwater through three different types of resin particles. 2+ / Mg 2+ Heavy metal ions and organic matter; removal of calcium from water through ion exchange process. 2+ and Mg 2+ This prevents scaling on the reverse osmosis membrane. The chelating resin particles remove heavy metal ions from the wastewater by forming stable coordination bonds with metal ions through functional groups. The antifouling resin particles capture organic molecules through van der Waals forces, thereby improving the purification efficiency of the subsequent reverse osmosis membrane.

[0056] S3. The groundwater treated by the resin filtration device 6 is discharged into the reverse osmosis device 8 through the connecting pipe 7. The groundwater is filtered through the reverse osmosis membrane tube 82 of the reverse osmosis device 8. The filtered groundwater is discharged into the seepage well 2 through the drainage pipe 9 so that the treated groundwater can seep back into the ground.

[0057] The water pump 3, ozone generator 42, reverse osmosis membrane tube 82, water pump 62, and suction pump 85 used in the above embodiments are all commercially available products. As long as they can achieve the function of the present invention, they are acceptable. Those skilled in the art can choose to use them based on common sense, and no special limitations are made here.

Claims

1. A groundwater remediation device, characterized in that, The device includes a deep well (1) and multiple circular seepage wells (2) distributed around the deep well (1). A water pump (3) is installed in the deep well (1). A water outlet pipe (31) is connected above the water pump (3). A water storage tank (4) is connected to the end of the water outlet pipe (31). A settling tank (5) is connected to the drain end of the water storage tank (4). A resin filter device (6) is connected to the end of the settling tank (5). A reverse osmosis device (8) is connected to the drain end of the resin filter device (6) through a connecting pipe (7). The drain end of the reverse osmosis device (8) is discharged into the seepage well (2) through a drain pipe (9).

2. The groundwater remediation device as described in claim 1, characterized in that, The inner wall and bottom of the seepage well (2) are provided with a plurality of seepage holes (21), and a seepage pipe (22) is provided in the seepage hole (21), and a plurality of seepage holes (23) are provided on the seepage pipe (22).

3. The groundwater remediation device as described in claim 1, characterized in that, The settling tank (5) includes a tank body (51), and a plurality of settling pipes (52) are provided below the tank body (51). A control valve (53) is provided at the lower end of the settling pipes (52). Two surface flow purification structures (54) are provided on the tank body (51) between two settling pipes (52), and an aeration mechanism (55) is provided between the two surface flow purification structures (54).

4. The groundwater remediation device as described in claim 3, characterized in that, The surface flow purification structure (54) includes a soil layer (541) laid at the bottom of the tank (51), a quartz sand layer (542) above the soil layer (541), a gravel layer (543) above the quartz sand layer (542), a vegetation layer (544) above the gravel layer (543), and baffles (545) fixed to the tank (51) on both sides of the soil layer (541), quartz sand layer (542), gravel layer (543), and vegetation layer (544), and an overflow hole (546) above the baffles (545).

5. A groundwater remediation device as described in claim 3, characterized in that, The aeration mechanism (55) includes two rotating seats (551) respectively located on the front and rear side walls of the tank (51), and a rotating shaft (552) is rotatably connected between the two rotating seats (551). A waterwheel (553) for aeration is provided on the rotating shaft (552).

6. The groundwater remediation device as described in claim 1, characterized in that, The bottom of the water storage tank (4) is provided with a microporous aeration pipe (41), and the air inlet end of the microporous aeration pipe (41) is connected to an ozone generator (42) through an air supply pipe.

7. The groundwater remediation device as described in claim 1, characterized in that, The resin filtration device (6) includes a filter shell (61), the top of which is connected to the end of the settling tank (5), and a second water pump (62) is provided at the bottom of the filter shell (61). The outlet of the second water pump (62) is connected to the connecting pipe (7). Three filter screens (63) are provided inside the filter shell (61), and sodium ion exchange resin particle layer (64), chelating resin particle layer (65), and anti-fouling resin particle layer (66) are respectively placed on the three filter screens (63).

8. The groundwater remediation device as described in claim 1, characterized in that, The reverse osmosis device (8) includes a permeation chamber (81), the top of which is connected to the end of the connecting pipe (7). Multiple reverse osmosis membrane tubes (82) are inserted and connected to the top of the reverse osmosis chamber (81). The top of the reverse osmosis membrane tubes (82) is threadedly connected to the top of the reverse osmosis chamber (81). A branch pipe (83) is connected to the top of the reverse osmosis membrane tubes (82). A main pipe (84) is connected to the end of the branch pipe (83). A water pump (85) is connected to the end of the main pipe (84). A drain chamber (86) is connected to the outlet of the water pump (85). One side of the drain chamber (86) is connected to the inlet of multiple drain pipes (9).

9. A groundwater remediation method, based on the groundwater remediation device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. The underground deep well water is pumped out to the outlet pipe (31) by the water pump (3) and discharged into the water storage tank (4) through the water pump pipe. The water in the water storage tank (4) flows into the settling tank (5). Impurities and suspended matter are separated in the settling tank (5) under the action of gravity. S2. After treatment in the settling tank (5), the water is discharged into the resin filter device (6). Under the action of gravity, the groundwater flows in from the top of the resin filter device (6) and is discharged from the bottom of the resin filter device (6). Ca in the groundwater is removed by three different resin particles. 2+ / Mg 2+ Heavy metal ions and organic matter; S3. The groundwater treated by the resin filtration device (6) is discharged into the reverse osmosis device (8) through the connecting pipe (7). The groundwater is filtered by the reverse osmosis device (8). The filtered groundwater is discharged into the seepage well (2) through the drainage pipe (9) so that the treated groundwater can seep back into the ground.

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