Equipment and method for repairing farmland groundwater pollution caused by organochlorine pesticide residues

Abstract

The invention discloses farmland groundwater pollution remediation equipment and method for organochlorine pesticide residues, and belongs to the technical field of polluted water treatment.The farmland groundwater pollution remediation equipment comprises a groundwater well excavated underground a farmland, a first water suction pump is arranged at the bottom of the groundwater well, and the first water suction pump communicates with a temporary storage pool located on the ground of the farmland through a water conveying pipe; a connecting plate is arranged above the temporary storage tank, a stirring motor is arranged on the connecting plate, an output shaft of the stirring motor is in transmission connection with a stirring rod extending into the temporary storage tank, and the connecting plate is provided with flocculant adding equipment; the temporary storage pool is communicated with reverse osmosis equipment through a plurality of oxidation channels and a collecting pipe, the water outlet end of the reverse osmosis equipment is connected with a water storage pool, a second water suction pump is arranged in the water storage pool, and the second water suction pump is connected with a plurality of spray heads through a spray pipe laid above the farmland ground; according to the invention, not only can organic chlorine pesticide residues in underground water be purified, but also organic chlorine residues in soil can be purified.

Description

Technical Field

[0001] The present invention relates to the technical field of contaminated water treatment, and in particular to a device and a method for remediating farmland groundwater contaminated by organochlorine pesticide residues. Background Art

[0002] Organochlorine pesticides are a class of compounds containing organochlorine elements. Due to their stable chemical properties, low volatility and difficulty in degradation, they tend to remain in the environment for a long time and accumulate in the food chain through bioaccumulation, ultimately affecting human health.

[0003] Organochlorine pesticide residues in farmland are carried underground by rainwater and then into groundwater, causing groundwater pollution. Existing methods for purifying groundwater contaminated by organochlorine pesticide residues in farmland include adsorption, oxidation, and reverse osmosis filtration. For organochlorine-contaminated groundwater, existing equipment has poor purification effect through adsorption, high energy consumption through oxidation, and filtration through reverse osmosis membranes, which easily cause membrane blockage, high cost, and unsatisfactory effect. Therefore, a multiple purification method is needed to improve the effect of groundwater purification and reduce the cost of groundwater purification. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a device and method for remediating farmland groundwater pollution caused by organochlorine pesticide residues.

[0005] The technical solution of the present invention is: a device for remediating groundwater pollution in farmland with organochlorine pesticide residues, comprising a groundwater well excavated underground in the farmland, a water pump 1 being provided at the bottom of the groundwater well, the water pump 1 being connected to a temporary storage tank located on the ground of the farmland through a water pipe, a connecting plate being provided above the temporary storage tank, a stirring motor being provided on the connecting plate, a stirring rod extending into the interior of the temporary storage tank being transmission-connected to the output shaft of the stirring motor, and a flocculant adding device being provided on the connecting plate; the temporary storage tank is connected to a reverse osmosis device through a plurality of oxidation channels and a collecting pipe, the water outlet end of the reverse osmosis device is connected to a water reservoir, a water pump 2 is provided in the water reservoir, and the water pump 2 is connected to a plurality of nozzles through a spray pipe laid above the ground of the farmland.

[0006] Furthermore, an electronic scale is connected below the flocculant adding device.

[0007] Note: It is convenient to check the remaining amount of flocculant by electronic scale.

[0008] Furthermore, the flocculant adding equipment includes a flocculant bin, the bottom of which is fixedly connected to the electronic scale via a short rod, the lower end of the flocculant bin is fixedly connected to a feed pipe, a spiral feed rod is rotatably connected to the feed pipe, and the top of the flocculant bin is fixedly connected to a feed motor for driving the spiral feed rod to rotate.

[0009] Description: The unloading motor drives the spiral unloading rod to rotate, realizing the function of automatic unloading.

[0010] Furthermore, the oxidation channel includes a water pump three, which is arranged in a temporary storage tank. A connecting pipe is provided on the water outlet of the water pump three, and the other end of the connecting pipe is fixedly connected to a channel shell. Anode plates and cathode plates are respectively provided on the front and rear inner walls of the channel shell. A battery is provided on the top of the channel shell, and a solar power generation panel for charging the battery is provided on the top of the battery. The positive pole of the battery is electrically connected to the anode plate, and the negative pole of the battery is electrically connected to the cathode plate. The right end of the channel shell is fixedly connected to a sedimentation separation mechanism.

[0011] Description: The electrolytic environment is formed by the anode plate and the cathode plate, and the solar panel provides electricity. The organochlorine pesticide residues are degraded by electrolytic oxidation. The anode plate uses TiO 2 Material, the cathode plate is made of stainless steel.

[0012] Furthermore, the sedimentation and separation mechanism includes a connecting channel, the left end of the connecting channel is fixedly connected to the channel shell, the lower right side of the connecting channel is fixedly connected to a sedimentation tank, the upper right side of the connecting channel is fixedly connected to an inclined channel, and the inclined channel is fixedly connected to the collecting pipe.

[0013] Description: After the sediment in the water passes through the sedimentation tank, it accumulates in the sedimentation tank under the action of gravity, and the supernatant enters the collecting pipe through the inclined channel.

[0014] Furthermore, the reverse osmosis equipment includes a reverse osmosis tank, a liquid inlet is provided on the left side of the reverse osmosis tank, the liquid inlet is fixedly connected to the collecting pipe, a cleaning window is fixedly connected to the right side of the bottom of the reverse osmosis tank, a membrane tube mechanism is provided in the reverse osmosis tank, and the membrane tube mechanism is fixedly connected to the water reservoir through a water outlet pipe.

[0015] Note: Organochlorine pesticide residues in water are further filtered through reverse osmosis equipment.

[0016] Furthermore, the membrane tube mechanism includes a plurality of branch pipes, and the plurality of branch pipes are distributed side by side. The left ends of the plurality of branch pipes are commonly connected to a left connecting water pipe, and the right ends of the plurality of branch pipes are commonly connected to a right connecting water pipe. The right end of the right connecting water pipe is fixedly connected to a main pipe, a water pump four is provided in the middle of the main pipe, the right end of the main pipe is fixedly connected to the water outlet pipe, and a plurality of membrane interfaces are provided at the lower end of the branch pipe, and the lower ends of the plurality of membrane interfaces are all threadedly connected to a reverse osmosis membrane tube.

[0017] Description: The above membrane tube mechanism is cleverly designed to facilitate replacement of reverse osmosis membrane tubes.

[0018] Furthermore, a control device is fixedly connected to the outer wall of the reverse osmosis equipment, and the control device includes a protective shell, a PLC controller located inside the protective shell, and a signal transceiver. The control device is remotely connected to a mobile phone client, and the PLC controller is electrically connected to the signal transceiver. The PLC controller is electrically connected to the water pump 1, water pump 2, flocculant addition equipment, oxidation channel, and reverse osmosis equipment, respectively.

[0019] Note: Use the mobile client to remotely control the operation of pump 1, pump 2, flocculant adding equipment, oxidation channel, and reverse osmosis equipment. You can also use the mobile client to check the remaining amount of flocculant in the flocculant bin and remotely adjust the flocculant feeding speed.

[0020] Furthermore, the present invention also provides a method for remediating farmland groundwater pollution caused by organochlorine pesticide residues, based on the above-mentioned farmland groundwater pollution remediation equipment caused by organochlorine pesticide residues, comprising the following steps: S1, pumping out groundwater through a pump and passing it into a temporary storage tank through a water pipe, adding flocculants into the temporary storage tank through a flocculant adding device, and the groundwater after flocculation treatment enters multiple oxidation channels, and the organochlorine pesticide residues in the groundwater are electrolytically oxidized through the oxidation channels to oxidize and decompose the organochlorine pesticide residues to form inorganic substances; S2. The groundwater after electrolytic oxidation treatment in the oxidation channel enters the collecting pipe, and is passed through the collecting pipe to the reverse osmosis equipment to filter the unoxidized organic chlorine residues. The filtered groundwater is then stored in the reservoir; S3. The water in the reservoir is pumped to the spray pipe through the second pump, and then irrigated to the farmland through the nozzle. The water falling into the farmland carries the organochlorine pesticide residues in the soil into the ground under the action of soil infiltration, and then enters the groundwater well and returns to S1 for circulation treatment.

[0021] The beneficial effects of the present invention are: (1) The present invention extracts groundwater from the surface, flocculates and oxidizes the organochlorine pesticide residues in the groundwater through flocculants and electrolytic oxidation, and finally filters the unclean organochlorine pesticide residues through a reverse osmosis membrane. The oxidative electrolysis uses solar panels to provide electricity, which reduces the cost of electrolytic oxidation of organochlorine pesticide residues. The flocculant has a high removal efficiency and good effect on the organochlorine pesticide residues in groundwater. This treatment method can increase the service life of the reverse osmosis membrane tube in the reverse osmosis equipment, and the combination of multiple methods has a good removal effect on organochlorine pesticide residues.

[0022] (2) The present invention extracts groundwater, purifies it to remove organochlorine pesticide residues, and then stores the groundwater in a reservoir for irrigating farmland. The treated water will carry the organochlorine residues in the soil back into the ground through infiltration. Under the action of osmotic pressure, the water will enter the groundwater well again, forming a cycle. The extraction of groundwater will not cause geological subsidence, thus forming a virtuous cycle of groundwater. Not only can the organochlorine pesticide residues in the groundwater be purified, but also the organochlorine residues in the soil can be purified. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the repair device of the present invention.

[0024] Figure 2 It is a top view of the overall structure of the repair device of the present invention.

[0025] Figure 3 It is a structural schematic diagram of the temporary storage pool of the present invention.

[0026] Figure 4 It is a cross-sectional view of the pipeline shell of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the reverse osmosis equipment of the present invention.

[0028] Figure 6 It is a top view of the membrane tube mechanism of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the control device of the present invention.

[0030] Among them, 1-groundwater well, 2-water pump 1, 3-water pipe, 4-temporary storage tank, 5-oxidation channel, 6-collecting pipe, 7-reverse osmosis equipment, 8-water storage tank, 41-connecting plate, 42-stirring motor, 43-stirring rod, 44-electronic scale, 45-flocculant adding equipment, 451-flocculant warehouse, 452-feeding pipe, 453-screw feeding rod, 454-feeding motor, 455-short rod, 51-water pump 3, 52-connecting pipe, 53-channel shell, 54-anode plate, 55-cathode plate, 56-battery, 57-solar power generation panel, 58-sinking Sedimentation separation mechanism, 581-connecting channel, 582-sedimentation tank, 583-inclined channel, 71-reverse osmosis chamber, 72-liquid inlet, 73-cleaning window, 74-membrane tube mechanism, 75-outlet pipe, 741-branch pipe, 742-left connecting water pipe, 743-right connecting water pipe, 744-main pipeline, 745-water pump four, 746-membrane interface, 747-reverse osmosis membrane tube, 81-water pump two, 82-spraying pipe, 83-sprinkler, 9-control equipment, 91-protective shell, 92-mobile client, 93-PLC controller, 94-signal transceiver. DETAILED DESCRIPTION

[0031] Example 1: Figure 1 , Figure 2 As shown, a farmland groundwater pollution remediation device with organochlorine pesticide residues includes a groundwater well 1 excavated underground in the farmland, a water pump 2 is provided at the bottom of the groundwater well 1, the water pump 2 is connected to a temporary storage tank 4 located on the ground of the farmland through a water pipe 3, a connecting plate 41 is provided above the temporary storage tank 4, a stirring motor 42 is provided on the connecting plate 41, a stirring rod 43 extending into the interior of the temporary storage tank 4 is transmission-connected to the output shaft of the stirring motor 42, and a flocculant adding device 45 is provided on the connecting plate 41; the temporary storage tank 4 is connected to a reverse osmosis device 7 through a plurality of oxidation channels 5 and a collecting pipe 6, the water outlet end of the reverse osmosis device 7 is connected to a water reservoir 8, a water pump 81 is provided in the water reservoir 8, and the water pump 81 is connected to a plurality of nozzles 83 through a spraying pipe 82 laid above the ground of the farmland.

[0032] like Figure 3 As shown, an electronic scale 44 is connected below the flocculant adding device 45 .

[0033] The flocculant adding device 45 includes a flocculant bin 451, the bottom of which is fixedly connected to the electronic scale 44 via a short rod 455, a discharge pipe 452 is fixedly connected to the lower end of the flocculant bin 451, a spiral discharge rod 453 is rotatably connected inside the discharge pipe 452, and a discharge motor 454 is fixedly connected to the top of the flocculant bin 451 for driving the spiral discharge rod 453 to rotate.

[0034] like Figure 4As shown, the oxidation channel 5 includes a water pump 3 51, which is arranged in the temporary storage tank 4. A connecting pipe 52 is provided on the water outlet of the water pump 3 51, and the other end of the connecting pipe 52 is fixedly connected to a channel shell 53. An anode plate 54 and a cathode plate 55 are respectively provided on the front and rear inner walls of the channel shell 53. A battery 56 is provided on the top of the channel shell 53. A solar power generation panel 57 for charging the battery 56 is provided on the top of the battery 56. The positive electrode of the battery 56 is electrically connected to the anode plate 54, and the negative electrode of the battery 56 is electrically connected to the cathode plate 55. The right end of the channel shell 53 is fixedly connected to a sedimentation separation mechanism 58.

[0035] An electrolytic environment is formed by the anode plate 54 and the cathode plate 55, and the solar panel 57 provides electricity to degrade the organochlorine pesticide residues by electrolytic oxidation. The anode plate 54 uses TiO 2 The cathode plate 55 is made of stainless steel.

[0036] The sedimentation separation mechanism 58 includes a connecting channel 581, the left end of which is fixedly connected to the channel shell 53, a sedimentation tank 582 is fixedly connected to the lower right side of the connecting channel 581, an inclined channel 583 is fixedly connected to the upper right side of the connecting channel 581, and the inclined channel 583 is fixedly connected to the collecting pipe 6.

[0037] like Figure 5 As shown, the reverse osmosis equipment 7 includes a reverse osmosis tank 71, a liquid inlet 72 is provided on the left side of the reverse osmosis tank 71, the liquid inlet 72 is fixedly connected to the collecting pipe 6, a cleaning window 73 is fixedly connected to the right side of the bottom of the reverse osmosis tank 71, and a membrane tube mechanism 74 is provided in the reverse osmosis tank 71, and the membrane tube mechanism 74 is fixedly connected to the water reservoir 8 through a water outlet pipe 75.

[0038] like Figure 6 As shown, the membrane tube mechanism 74 includes a plurality of branch pipes 741, and the plurality of branch pipes 741 are arranged side by side. The left ends of the plurality of branch pipes 741 are commonly connected to a left connecting water pipe 742, and the right ends of the plurality of branch pipes 741 are commonly connected to a right connecting water pipe 743. The right end of the right connecting water pipe 743 is fixedly connected to a main pipe 744. A water pump 745 is provided in the middle of the main pipe 744. The right end of the main pipe 744 is fixedly connected to a water outlet pipe 75. A plurality of membrane interfaces 746 are provided at the lower end of the branch pipe 741, and the lower ends of the plurality of membrane interfaces 746 are all threadedly connected to a reverse osmosis membrane tube 747.

[0039] Embodiment 2: This embodiment differs from Embodiment 1 in that Figure 7As shown, the outer wall of the reverse osmosis device 7 is also fixedly connected to a control device 9, which includes a protective shell 91, a PLC controller 93 located inside the protective shell 91, and a signal transceiver 94. The control device 9 is remotely connected to the mobile client 92, the PLC controller 93 is electrically connected to the signal transceiver 94, and the PLC controller 93 is electrically connected to the water pump 1 2, the water pump 2 81, the flocculant adding device 45, the oxidation channel 5, and the reverse osmosis device 7 respectively.

[0040] Specifically, the mobile client 92 is connected to the signal transceiver 94 via wireless signals, and the signal transceiver 94 is electrically connected to the PLC controller 93. The PLC controller 93 controls the start and stop of the water pump 1 2 and the water pump 2 81 as well as the pumping speed. The PLC controller 93 controls the start and stop of the feed motor 454 in the flocculant adding device 45 as well as the feed speed. The PLC controller 93 controls and adjusts the voltage between the anode plate 54 and the cathode plate 55 in the oxidation channel 5. The PLC controller 93 controls the start and stop of the water pump 4 745 in the reverse osmosis device 7 as well as the pumping force.

[0041] Embodiment 3: This embodiment provides a method for remediating farmland groundwater contamination caused by organochlorine pesticide residues, based on a farmland groundwater contamination remediation device caused by organochlorine pesticide residues in the above embodiment 1, comprising the following steps: S1, pumping out groundwater through a pump 2 and passing it into a temporary storage tank 4 through a water pipe 3, adding flocculants into the temporary storage tank 4 through a flocculant adding device 45, and the groundwater after flocculation treatment enters a plurality of oxidation channels 5, and the organochlorine pesticide residues in the groundwater are electrolytically oxidized through the oxidation channels 5, and the organochlorine pesticide residues are oxidized and decomposed to form inorganic substances; S2, the groundwater after electrolytic oxidation treatment through the oxidation channel 5 enters the collecting pipe 6, and is passed through the collecting pipe 6 to the reverse osmosis device 7 to filter the unoxidized organic chlorine residues, and the filtered groundwater is then stored in the reservoir 8; S3, the water in the water reservoir 8 is pumped to the spray pipe 82 through the pump 81, and then irrigated to the farmland through the nozzle 83. The water falling into the farmland carries the organochlorine pesticide residues in the soil into the ground under the action of soil infiltration, and then enters the groundwater well 1 and returns to S1 for circulation treatment.

[0042] Example 4: This example provides a method for remediating groundwater pollution in farmland with organochlorine pesticide residues. It is based on an equipment for remediating groundwater pollution in farmland with organochlorine pesticide residues in the above-mentioned example 2, and differs from example 3 in that: a control signal is sent to a signal transceiver 94 via a mobile client 92, and the signal transceiver 94 transmits the control signal to a PLC controller 93, and the PLC controller controls the operation of water pump 1 2, water pump 2 81, water pump 3 51, and water pump 4 745. The remaining amount of flocculant in the flocculant bin 451 can also be checked via the mobile client 92, and the feeding speed of the flocculant can be adjusted remotely.

[0043] The water pump 1 2, water pump 2 81, stirring motor 42, electronic scale 44 unloading motor 454, water pump 3 51, battery 56, solar panel 57, water pump 4 745, reverse osmosis membrane tube 747, PLC controller 93, and signal transceiver 94 used in the above embodiments are all commercially available products. As long as the functions of the present invention can be achieved, those skilled in the art can choose to use them according to common sense and no special limitation is made here.

[0044] Test example: The equipment for remediating groundwater pollution in farmland with organochlorine pesticide residues in the above-mentioned embodiment 2 is used for remediating groundwater pollution in farmland with organochlorine pesticide residues. The organochlorine pesticide residues in the farmland soil and the organic pesticide residues in the farmland groundwater are detected before the test. Then, the groundwater pollution in the farmland is remediated by the equipment for remediating groundwater pollution in farmland with organochlorine pesticide residues of the present invention for a period of 3 months. The test results are shown in Tables 1 and 2.

[0045] Table 1: Record of remediation effect of organochlorine pesticide residue pollution in farmland groundwater;

[0046] Table 2: Record of remediation effect of organochlorine pesticide residue pollution in farmland soil;

[0047] By comparing Table 1 and Table 2, it can be found that the farmland groundwater pollution remediation equipment with organochlorine pesticide residues of the present invention has a removal rate of 78% for total organochlorine pesticide residues in groundwater, a removal rate of 72% for DDTs in groundwater, a removal rate of 62% for HCHs in groundwater, a removal rate of 78% for total organochlorine pesticide residues in soil, a removal rate of 76% for DDTs in soil, and a removal rate of 76% for HCHs in soil in the treatment of organic pesticide residue pollution remediation in farmland groundwater.

Claims

1. A device for remediating farmland groundwater pollution caused by organochlorine pesticide residues, characterized in that: The invention comprises a groundwater well (1) excavated under a farmland, wherein a water pump (2) is provided at the bottom of the groundwater well (1), wherein the water pump (2) is connected to a temporary storage tank (4) located on the ground of the farmland through a water pipe (3), wherein a connecting plate (41) is provided above the temporary storage tank (4), wherein a stirring motor (42) is provided on the connecting plate (41), wherein an output shaft of the stirring motor (42) is drivingly connected to a stirring rod (43) extending into the interior of the temporary storage tank (4), wherein the connecting plate (41) is provided with a flocculant adding device (45); wherein the temporary storage tank (4) is connected to a reverse osmosis device (7) through a plurality of oxidation channels (5) and a collecting pipe (6), wherein a water outlet of the reverse osmosis device (7) is connected to a water reservoir (8), wherein a water pump (81) is provided in the water reservoir (8), wherein the water pump (81) is connected to a plurality of spray heads (83) through a spray pipe (82) laid above the ground of the farmland.

2. The equipment for remediating farmland groundwater pollution caused by organochlorine pesticide residues as claimed in claim 1, characterized in that: An electronic scale (44) is connected below the flocculant adding device (45).

3. The equipment for remediating farmland groundwater pollution caused by organochlorine pesticide residues as claimed in claim 2, characterized in that: The flocculant adding device (45) comprises a flocculant bin (451), the bottom of the flocculant bin (451) is fixedly connected to the electronic scale (44) via a short rod (455), the lower end of the flocculant bin (451) is fixedly connected to a feeding pipe (452), a spiral feeding rod (453) is rotatably connected inside the feeding pipe (452), and the top of the flocculant bin (451) is fixedly connected to a feeding motor (454) for driving the spiral feeding rod (453) to rotate.

4. The equipment for remediating farmland groundwater pollution caused by organochlorine pesticide residues as claimed in claim 1, characterized in that: The oxidation channel (5) comprises a water pump (51) three, the water pump (51) three being arranged in the temporary storage tank (4), a connecting pipe (52) being arranged on the water outlet of the water pump (51), the other end of the connecting pipe (52) being fixedly connected to a channel shell (53), the inner walls of the front and rear sides of the channel shell (53) being respectively provided with an anode plate (54) and a cathode plate (55), a storage battery (56) being arranged on the top of the storage battery (56), a solar power generation panel (57) for charging the storage battery (56) being arranged on the top of the storage battery (56), the positive electrode of the storage battery (56) being electrically connected to the anode plate (54), the negative electrode of the storage battery (56) being electrically connected to the cathode plate (55), and the right end of the channel shell (53) being fixedly connected to a sedimentation separation mechanism (58).

5. The equipment for remediating farmland groundwater pollution caused by organochlorine pesticide residues as claimed in claim 4, characterized in that: The sedimentation separation mechanism (58) comprises a connecting channel (581), the left end of the connecting channel (581) being fixedly connected to the channel shell (53), the lower right side of the connecting channel (581) being fixedly connected to a sedimentation tank (582), the upper right side of the connecting channel (581) being fixedly connected to an inclined channel (583), and the inclined channel (583) being fixedly connected to the collecting pipe (6).

6. The equipment for remediating farmland groundwater contamination caused by organochlorine pesticide residues as claimed in claim 1, characterized in that: The reverse osmosis device (7) comprises a reverse osmosis chamber (71), a liquid inlet (72) being provided on the left side of the reverse osmosis chamber (71), the liquid inlet (72) being fixedly connected to the collecting pipe (6), a cleaning window (73) being fixedly connected to the right side of the bottom of the reverse osmosis chamber (71), a membrane tube mechanism (74) being provided in the reverse osmosis chamber (71), the membrane tube mechanism (74) being fixedly connected to the water reservoir (8) via a water outlet pipe (75).

7. The equipment for remediating farmland groundwater contamination caused by organochlorine pesticide residues as claimed in claim 6, characterized in that: The membrane tube mechanism (74) comprises a plurality of branch tubes (741), wherein the plurality of branch tubes (741) are arranged side by side, the left ends of the plurality of branch tubes (741) are commonly connected to a left connecting water pipe (742), the right ends of the plurality of branch tubes (741) are commonly connected to a right connecting water pipe (743), the right end of the right connecting water pipe (743) is fixedly connected to a main pipeline (744), a water pump four (745) is provided in the middle of the main pipeline (744), the right end of the main pipeline (744) is fixedly connected to the water outlet pipe (75), the lower end of the branch tube (741) is provided with a plurality of membrane interfaces (746), and the lower ends of the plurality of membrane interfaces (746) are all threadedly connected to a reverse osmosis membrane tube (747).

8. The equipment for remediating farmland groundwater contamination with organochlorine pesticide residues as claimed in claim 1, characterized in that: The outer wall of the reverse osmosis device (7) is also fixedly connected to a control device (9), the control device (9) comprising a protective shell (91), a PLC controller (93) located inside the protective shell (91), and a signal transceiver (94). The control device (9) is remotely connected to a mobile phone client (92), the PLC controller (93) is electrically connected to the signal transceiver (94), and the PLC controller (93) is electrically connected to the water pump 1 (2), the water pump 2 (81), the flocculant addition device (45), the oxidation channel (5), and the reverse osmosis device (7), respectively.

9. A method for remediating farmland groundwater contamination caused by organochlorine pesticide residues, based on the farmland groundwater contamination remediation device caused by organochlorine pesticide residues according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, pumping out groundwater through a water pump (2) and passing the groundwater through a water pipe (3) into a temporary storage tank (4), adding flocculants into the temporary storage tank (4) through a flocculant adding device (45), and the groundwater after flocculation treatment enters a plurality of oxidation channels (5), and the organochlorine pesticide residues in the groundwater are electrolytically oxidized through the oxidation channels (5), thereby oxidizing and decomposing the organochlorine pesticide residues to form inorganic substances; S2, the groundwater after electrolytic oxidation treatment in the oxidation channel (5) enters the collecting pipe (6), and is passed from the collecting pipe (6) to the reverse osmosis device (7) to filter the unoxidized organic chlorine residues, and the filtered groundwater is then stored in the reservoir (8); S3, the water in the water reservoir (8) is pumped to the spray pipe (82) through the second pump (81), and then irrigated to the farmland through the nozzle (83). The water falling into the farmland, under the action of soil infiltration, carries the organochlorine pesticide residues in the soil into the ground, and then enters the groundwater well (1), and returns to S1 for circulation treatment.

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