Modularized underground water treatment equipment

Abstract

The invention relates to the technical field of underground water treatment equipment, and discloses modularized underground water treatment equipment which comprises a waste water collecting pool, a liquid medicine blending bin and a coagulation stirring tank, and a flow mixing pipeline is arranged between the waste water collecting pool and the coagulation stirring tank in a communicating mode. Sewage in the wastewater collection pool and a composite efficient oxidation flocculant in the liquid medicine blending bin are jointly conveyed into the coagulation stirring tank from the mixed flow pipeline through pumping, a stirring mechanism is arranged in the coagulation stirring tank, and a supporting frame is further arranged in the coagulation stirring tank. The stirring mechanism comprises a stirring rod obliquely arranged in the coagulation stirring tank, stirring blades distributed on the periphery of the stirring rod, a limiting ball seat arranged on the stirring rod in a sleeving manner and rotationally arranged on the supporting frame, a first driving part for driving the stirring rod to axially rotate around the coagulation stirring tank, and a second driving part for driving the stirring rod to rotate; and the coagulation stirring tank is also provided with an adjusting piece for adjusting and controlling whether the stirring rod rotates or not. The arsenic removal effect on underground water is improved.

Description

Technical Field

[0001] The present application relates to the technical field of groundwater treatment equipment, and in particular to a modular groundwater treatment equipment. Background Art

[0002] At present, drinking high-arsenic groundwater has caused serious harm to the health of hundreds of millions of people around the world. Long-term drinking of high-arsenic groundwater can lead to high-risk diseases such as skin cancer and lung cancer. As a representative technology for ex situ remediation of groundwater pollution, the extraction-treatment remediation technology is a representative technology for ex situ remediation of groundwater pollution. According to the scope of contaminated groundwater, a certain number of pumping wells are arranged in the contaminated site. The dissolved phase pollutants in the groundwater capture area are extracted to the surface by submersible pumps or vacuum pumps, and the contaminated groundwater is collected in the wastewater collection pool. The groundwater after passing through the underground wastewater treatment equipment is collected in the clean water pool, and the groundwater in the clean water pool is tested and recharged after the water quality meets the standard. Compared with other contaminated groundwater remediation technologies, it has the advantages of simple process, small disturbance to the ground environment, and the ability to flexibly combine multiple remediation technologies. It is a green and environmentally friendly groundwater remediation technology.

[0003] In the existing technology, the purification methods for high-arsenic groundwater using groundwater treatment equipment include coagulation and sedimentation, ion exchange, adsorption, membrane separation, and biological methods. However, the above methods all have their own disadvantages. For example, the coagulation and sedimentation method is prone to produce unstable sludge and is more suitable for ex situ purification; the ion exchange method will produce new waste liquid, the cycle is long, and the presence of organic matter will contaminate the ion resin; the adsorption method requires regeneration and regular replacement of resins, and the operating cost is high; the membrane separation method is prone to embolism, requires regular maintenance, and the later operating cost is very high; the biological method takes a long time.

[0004] Due to technical and economic limitations, the coagulation sedimentation method is currently widely used. However, when using the coagulation sedimentation method, the agent is hydrolyzed after being added to the sewage and produces heterocharged colloids, which come into contact with colloids and suspended matter in the water to form fine flocs. In order to fully encapsulate the arsenic in the underground sewage into the flocs for sedimentation, it is necessary to fully stir it. However, if the stirring force is too strong during the stirring process, the generated flocs will be broken, and the larger the flocs, the easier it is to be broken due to stirring. If the broken flocs do not reach the particle size of natural sedimentation, it is difficult to achieve the sedimentation effect, thereby reducing the effect of subsequent separation. Summary of the invention

[0005] In order to effectively improve the arsenic removal effect on groundwater, the present application provides a modular groundwater treatment device.

[0006] The modular groundwater treatment equipment provided in this application adopts the following technical solution: A modular groundwater treatment device comprises a wastewater collection tank, a coagulation stirring tank is arranged on one side of the wastewater collection tank, a mixed flow pipe is arranged between the wastewater collection tank and the coagulation stirring tank, a liquid medicine preparation tank is arranged above the mixed flow pipe, the sewage in the wastewater collection tank is pumped together with the composite high-efficiency oxidation flocculant in the liquid medicine preparation tank from the mixed flow pipe to the coagulation stirring tank, a stirring mechanism is arranged in the coagulation stirring tank, a support frame is also arranged in the coagulation stirring tank, the stirring mechanism comprises a stirring rod obliquely arranged in the coagulation stirring tank, stirring blades distributed around the stirring rod, a limiting ball seat sleeved on the stirring rod and rotatably arranged on the support frame, a first driving member driving the stirring rod to rotate around the axis of the coagulation stirring tank, and a second driving member driving the stirring rod to rotate, and the coagulation stirring tank is also provided with an adjusting member for regulating whether the stirring rod rotates.

[0007] By adopting the above technical solution, the sewage in the wastewater collection tank and the composite high-efficiency oxidation flocculant in the liquid preparation tank are pumped from the mixed flow pipeline to the coagulation stirring tank, the first driving member drives the stirring rod to rotate around the axis of the coagulation stirring tank, the second driving member drives the stirring rod to rotate, and the stirring blade rotates around the stirring rod accordingly, so as to achieve full mixing of the sewage and the flocculant. The regulating member can control the rotation state of the stirring rod as needed to adjust the stirring strength, ensure the mixing effect and avoid the floccules from breaking.

[0008] Optionally, the first driving member includes a rotating rod coaxially rotatably arranged on the top wall of the coagulation mixing tank, a driving rod connected between the rotating rod and the stirring rod, and a servo motor driving the rotating rod to rotate. The servo motor is located at the top of the coagulation mixing tank, and its output shaft rotatably passes through the top of the coagulation mixing tank and is coaxially fixedly connected to the rotating rod. One end of the driving rod is fixedly arranged at the bottom end of the rotating rod, and the other end of the driving rod is rotatably sleeved on the stirring rod.

[0009] By adopting the above technical solution, the servo motor is started, and the output shaft drives the rotating rod to start to rotate slowly. The rotation of the rotating rod drives the driving rod to make a circular motion with the axial direction of the rotating rod as the center. Since the rotating stirring rod is inserted into the end of the driving rod, the rotation of the driving rod drives the stirring rod to rotate synchronously with the axial direction of the rotating rod as the center. Under the limitation of the support frame and the limiting ball seat, the part of the stirring rod below the limiting ball seat rotates in the opposite direction. The slow rotation of the stirring rod around the axial direction of the coagulation stirring tank further improves the purification effect while avoiding damage to the larger flocs that have been formed in the coagulation stirring tank.

[0010] Optionally, a connecting pipe coaxially sleeved on a rotating rod is fixedly provided on the inner top wall of the coagulation mixing tank, and the rotating rod and the connecting pipe are rotatably matched via a bearing, and the second driving member includes a static gear coaxially sleeved on the connecting pipe and a dynamic gear sleeved on the top end of the stirring rod and meshing with the static gear. When the rotating rod rotates to drive the stirring rod to rotate axially around the coagulation mixing tank, since the dynamic gear is always meshed with the static gear, the stirring rod rotates synchronously, and at this time, a plurality of stirring blades rotate synchronously around the stirring rod.

[0011] By adopting the above technical solution, the stirring rod is driven to rotate around the axis of the coagulation stirring tank, and at the same time, the engagement between the static gear and the moving gear drives the stirring rod to rotate on its own, so that the stirring blade can rotate around the stirring rod. The rotation of the stirring blade is coordinated with the rotation of the stirring rod, which improves the mixing efficiency of the sewage and the composite high-efficiency oxidation flocculant, thereby improving the purification effect of arsenic in the sewage.

[0012] Optionally, a coaxial fixed sleeve on the connecting pipe is provided with a fixed plate, and the fixed plate is located between the inner top wall of the coagulation mixing tank and the static gear. The adjusting part is a plurality of cylinders arranged on the top of the coagulation mixing tank, and the plurality of cylinders are distributed along the circumference of the static gear. Each of the cylinders is vertically arranged, and the piston rods thereof slide together vertically through the top wall of the coagulation mixing tank and the fixed plate, and are connected to the top wall of the static gear. When the piston rods of the plurality of cylinders are in a retracted state, the static gear abuts against the fixed plate. At this time, the static gear is away from the moving gear and does not mesh with the moving gear.

[0013] By adopting the above technical scheme, the telescopic state of the cylinder piston rod is controlled, so as to realize the flexible adjustment of the position of the static gear, and then realize the control of the rotation state of the stirring rod. When the sewage water quality in the coagulation mixing tank gradually tends to be stable, the cylinder piston rod is controlled to shrink, so that the static gear moves away from the moving gear. At this time, the moving gear idles, the stirring rod stops rotating, and only the first driving member is used to drive the stirring rod to rotate slowly around the axis of the coagulation mixing tank. While avoiding damage to the larger flocs that have been formed in the coagulation mixing tank, the purification effect is further improved.

[0014] Optionally, a rubber pad is provided on the side of the fixing plate facing the static gear.

[0015] By adopting the above technical solution and setting the rubber pad, when the cylinder piston rod contracts and drives the static gear to move toward one side of the fixed plate, the rigid friction between the static gear and the fixed plate is converted into flexible friction, thereby reducing the occurrence of wear caused by friction.

[0016] Optionally, the stationary gear and the moving gear are a pair of meshing spur bevel gears, the outer diameter of the gear ring of the stationary gear gradually decreases from top to bottom, and the outer diameter of the gear ring of the moving gear gradually increases from top to bottom.

[0017] By adopting the above technical solution, the setting of the guide inclined surfaces of the static gear and the movable gear makes it easier for the static gear to quickly mesh and dock with the movable gear along the guide surface during the lifting process.

[0018] Optionally, the coagulation mixing tank is also provided with a monitoring component for monitoring the water quality of sewage in the coagulation mixing tank. The monitoring component includes a water quality detector arranged in the coagulation mixing tank and a controller electrically connected to the water quality detector. The controller is used to receive a detection signal from the water quality detector and control the extension and retraction status of several cylinder piston rods according to the detection signal.

[0019] By adopting the above technical solution, the water quality detector can monitor the water quality of sewage in the coagulation mixing tank in real time. When it is detected that the water quality reaches the predetermined standard, the controller controls the cylinder piston rod to extend, so that the static gear and the moving gear are separated, and the stirring rod stops rotating and only rotates around the axis of the tank to reduce the stirring force and avoid excessive stirring. This intelligent control not only improves the treatment efficiency, but also ensures that the treated water quality is stable and meets the standard.

[0020] Optionally, a water suction pipe is provided on the side of the coagulation stirring tank away from the wastewater collection tank, and a separation diaphragm for preventing floccules from entering the water suction pipe is detachably provided on the end of the water suction pipe extending to the coagulation stirring tank.

[0021] By adopting the above technical solution, the function of the separation membrane is to prevent floccules that have not reached the natural sedimentation particle size from entering the pumping pipe, ensuring that the water that finally enters the clean water tank is clean water that has been effectively settled. Through this design, the treatment effect of groundwater is further improved. In addition, the detachable design of the separation membrane also facilitates the maintenance and cleaning of the equipment.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The sewage in the wastewater collection tank and the composite high-efficiency oxidation flocculant in the liquid preparation tank are pumped from the mixed flow pipeline to the coagulation and mixing tank. The first driving member drives the stirring rod to rotate around the axis of the coagulation and mixing tank, and the second driving member drives the stirring rod to rotate, and the stirring blade rotates around the stirring rod accordingly to achieve full mixing of the sewage and the flocculant. The regulating member can control the rotation state of the stirring rod as needed to adjust the stirring intensity, ensuring the mixing effect while avoiding the floccules from breaking; 2. Start the servo motor, and the output shaft drives the rotating rod to start to rotate slowly. The rotation of the rotating rod drives the driving rod to make a circular motion along the axial direction of the rotating rod as the center of the circle. Since the stirring rod is rotated and penetrated on the end of the driving rod, the rotation of the driving rod drives the stirring rod to rotate synchronously with the axial direction of the rotating rod as the center of the circle. Under the limitation of the support frame and the limiting ball seat, the part of the stirring rod below the limiting ball seat rotates in the opposite direction. The stirring rod rotates slowly around the axial direction of the coagulation stirring tank, which avoids damage to the larger flocs that have been formed in the coagulation stirring tank, and further improves the purification effect. 3. The stirring rod is driven to rotate around the axis of the coagulation mixing tank, and at the same time, the engagement between the static gear and the moving gear drives the stirring rod to rotate, so that the stirring blade can rotate around the stirring rod. The rotation of the stirring blade cooperates with the rotation of the stirring rod, which improves the mixing efficiency of the sewage and the composite high-efficiency oxidation flocculant, thereby improving the purification effect of arsenic in the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0024] Figure 2 It is a cross-sectional view showing the internal structure of a concrete mixing tank in an embodiment of the present application.

[0025] Description of reference numerals: 1. Wastewater collection tank; 2. Coagulation mixing tank; 21. Connecting pipe; 22. Fixed plate; 221. Rubber pad; 3. Mixing pipeline; 4. Liquid preparation chamber; 5. Stirring mechanism; 51. Stirring rod; 52. Stirring blade; 53. Limiting ball seat; 54. First driving member; 541. Rotating rod; 542. Driving rod; 543. Servo motor; 55. Second driving member; 551. Static gear; 552. Moving gear; 6. Monitoring component; 61. Water quality detector; 62. Controller; 7. Pumping pipe; 71. Separation diaphragm; 8. Support frame; 9. Adjustment member; 91. Cylinder. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-2 This application is described in further detail.

[0027] The embodiment of the present application discloses a modular groundwater treatment device.

[0028] Reference Figure 1 and Figure 2A modular groundwater treatment device includes a wastewater collection tank 1, a coagulation stirring tank 2 is arranged on one side of the wastewater collection tank 1, a mixed flow pipe 3 is arranged between the wastewater collection tank 1 and the coagulation stirring tank 2, a liquid preparation tank 4 is arranged above the mixed flow pipe 3, a stirring mechanism 5 is arranged in the coagulation stirring tank 2, and a monitoring component 6 for monitoring the water quality of the sewage in the coagulation stirring tank 2 is also arranged in the coagulation stirring tank 2, and a pumping pipe 7 is arranged on the side of the coagulation stirring tank 2 away from the wastewater collection tank 1.

[0029] Reference Figure 1 and Figure 2 During the operation, the sewage in the wastewater collection tank 1 is pumped into the coagulation and mixing tank 2 together with the composite high-efficiency oxidation flocculant in the liquid preparation tank 4. Through the special stirring mechanism 5 and its driving mode, the sewage and the flocculant are fully mixed, so that the arsenic in the sewage is effectively flocculated and settled. The monitoring component 6 monitors the sewage water quality in the coagulation and mixing tank 2. When the water quality meets the standard, the pumping pipe 7 pumps out the purified groundwater in the coagulation and mixing tank 2.

[0030] Reference Figure 2 , a support frame 8 is also fixedly arranged in the coagulation and mixing tank 2. The stirring mechanism 5 includes a stirring rod 51, a stirring blade 52, a limiting ball seat 53, a first driving member 54 and a second driving member 55. The stirring rod 51 is tiltedly arranged in the coagulation and mixing tank 2, and the limiting ball seat 53 is fixedly sleeved on the stirring rod 51, and is located at the center of the support frame 8 and rotatably cooperates with the support frame 8. The stirring blade 52 is perpendicular to the axial direction of the stirring rod 51 and is fixedly arranged on the side wall of the stirring rod 51. In this embodiment, four stirring blades 52 are arranged, and the four stirring blades 52 are all located below the support frame 8 and are evenly distributed around the axial direction of the stirring rod 51.

[0031] Reference Figure 2 The first driving member 54 is used to drive the stirring rod 51 to rotate around the axial direction of the coagulation and mixing tank 2, and includes a rotating rod 541, a driving rod 542 and a servo motor 543. The rotating rod 541 is coaxially rotatably arranged on the top wall of the coagulation and mixing tank 2, one end of the driving rod 542 is fixedly connected to the bottom end of the rotating rod 541, and the other end is rotatably sleeved on the stirring rod 51. The servo motor 543 is fixedly arranged on the top wall of the coagulation and mixing tank 2, and its output shaft is rotatably passed through the tank top of the coagulation and mixing tank 2 and is coaxially fixedly connected to the rotating rod 541.

[0032] Reference Figure 2, a connecting pipe 21 is coaxially sleeved on the rotating rod 541 through a bearing, and the top wall of the connecting pipe 21 is fixedly arranged on the inner top wall of the coagulation mixing tank 2. The second driving member 55 drives the stirring rod 51 to rotate on the basis of the first driving member 54, and includes a static gear 551 and a dynamic gear 552. The static gear 551 is located on the side of the fixed plate 22 away from the inner top wall of the coagulation mixing tank 2, and is coaxially slidably sleeved on the connecting pipe 21. The dynamic gear 552 is rotatably sleeved on the top of the stirring rod 51 and meshed with the static gear 551. In this embodiment, the static gear 551 and the dynamic gear 552 are a pair of meshing straight bevel gears. The outer diameter of the gear ring of the static gear 551 gradually decreases from top to bottom, and the outer diameter of the gear ring of the dynamic gear 552 gradually increases from top to bottom.

[0033] Reference Figure 1 and Figure 2 The connecting pipe 21 is coaxially fixedly sleeved with a fixing plate 22 on the part near the inner top wall of the coagulation mixing tank 2, and a rubber pad 221 is fixedly provided on the side of the fixing plate 22 facing the static gear 551. The coagulation mixing tank 2 is also provided with an adjusting member 9. The adjusting member 9 in this embodiment is four cylinders 91. The four cylinders 91 are distributed along the circumference of the static gear 551. Each cylinder 91 is vertically arranged, and its piston rod slides vertically together through the top wall of the coagulation mixing tank 2, the fixing plate 22 and the rubber pad 221, and is connected to the top wall of the static gear 551. Reference Figure 1 and Figure 2 The monitoring component 6 includes a water quality detector 61 and a controller 62. The water quality detector 61 is fixedly plugged into the side wall of the coagulation mixing tank 2, and its detection probe is located inside the coagulation mixing tank 2 and immersed in the groundwater. The controller 62 is fixedly installed on the side wall of the coagulation mixing tank 2 and is electrically connected to the water quality detector 61.

[0034] Reference Figure 2 In order to effectively prevent larger flocs from entering the water pumping pipe 7 , a separation membrane 71 is detachably installed on the end of the water pumping pipe 7 extending to the coagulation and mixing tank 2 .

[0035] Reference Figure 1 and Figure 2 In this embodiment, all electrical appliances are electrically connected to the controller 62.

[0036] The implementation principle of a modular groundwater treatment device in the embodiment of the present application is as follows: during operation, the sewage in the wastewater collection tank 1 is pumped into the coagulation and mixing tank 2 together with the composite high-efficiency oxidation flocculant in the liquid preparation tank 4; At the initial stage of purification, the servo motor 543 is started, and the output shaft drives the rotating rod 541 to start to rotate slowly. The rotation of the rotating rod 541 drives the driving rod 542 to make a circular motion along the axial direction of the rotating rod 541 as the center of the circle. Since the stirring rod 51 rotates and penetrates the end of the driving rod 542, the rotation of the driving rod 542 drives the stirring rod 51 to synchronously stir and rotate the stirring rod 51 slowly around the axial direction of the coagulation and mixing tank 2. At the same time, the piston rod of the cylinder 91 extends, and the moving gear 552 on the stirring rod 51 is meshed with the static gear 551. When the stirring rod 51 rotates around the axial direction of the coagulation and mixing tank 2, due to the meshing of the moving gear 552 and the static gear 551, the stirring rod 51 rotates by itself, so that the stirring blade 52 can rotate around the stirring rod 51. The rotation of the stirring blade 52 cooperates with the rotation of the stirring rod 51, which improves the mixing efficiency of the sewage and the composite high-efficiency oxidation flocculant, thereby improving the purification effect of arsenic in the sewage; When the sewage quality in the coagulation and mixing tank 2 tends to be stable, or the formed flocs reach a certain size, the controller 62 can intelligently control the extension and contraction state of the piston rod of the cylinder 91 according to the detection signal received from the water quality detector 61, thereby controlling the stirring rod 51 to stop rotating, thereby avoiding damage to the flocs that have been formed; Finally, when the sewage water quality in the coagulation and mixing tank 2 reaches the standard, the controller 62 controls the servo motor 543 to stop working, and starts the pumping pipe 7 to extract clean water from the coagulation and mixing tank 2.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A modular groundwater treatment device, comprising a wastewater collection tank (1), a coagulation and stirring tank (2) is arranged on one side of the wastewater collection tank (1), a mixed flow pipe (3) is arranged between the wastewater collection tank (1) and the coagulation and stirring tank (2), a liquid medicine preparation tank (4) is arranged above the mixed flow pipe (3), the sewage in the wastewater collection tank (1) is pumped together with the composite high-efficiency oxidation flocculant in the liquid medicine preparation tank (4) from the mixed flow pipe (3) to the coagulation and stirring tank (2), characterized in that: The coagulation mixing tank (2) is provided with a stirring mechanism (5), and the coagulation mixing tank (2) is also provided with a support frame (8), the stirring mechanism (5) comprises a stirring rod (51) obliquely arranged in the coagulation mixing tank (2), stirring blades (52) distributed around the stirring rod (51), a limiting ball seat (53) sleeved on the stirring rod (51) and rotatably arranged on the support frame (8), a first driving member (54) driving the stirring rod (51) to rotate around the axis of the coagulation mixing tank (2) and a second driving member (55) driving the stirring rod (51) to rotate, and the coagulation mixing tank (2) is also provided with an adjusting member (9) for controlling whether the stirring rod (51) rotates.

2. A modular groundwater treatment device according to claim 1, characterized in that: The first driving member (54) comprises a rotating rod (541) coaxially rotatably arranged on the inner top wall of the coagulation and mixing tank (2), a driving rod (542) connecting the rotating rod (541) and the stirring rod (51), and a servo motor (543) driving the rotating rod (541) to rotate, wherein the servo motor (543) is located at the top of the coagulation and mixing tank (2), and its output shaft rotatably penetrates the tank top of the coagulation and mixing tank (2) and is coaxially fixedly connected to the rotating rod (541), one end of the driving rod (542) is fixedly arranged at the bottom end of the rotating rod (541), and the other end of the driving rod (542) is rotatably sleeved on the stirring rod (51).

3. A modular groundwater treatment device according to claim 2, characterized in that: A connecting pipe (21) coaxially sleeved on a rotating rod (541) is fixedly provided on the inner top wall of the coagulation mixing tank (2), and the rotating rod (541) and the connecting pipe (21) are rotatably matched via a bearing. The second driving member (55) comprises a static gear (551) coaxially sleeved on the connecting pipe (21) and a dynamic gear (552) sleeved on the top end of the stirring rod (51) and meshed with the static gear (551). When the rotating rod (541) rotates to drive the stirring rod (51) to rotate axially around the coagulation mixing tank (2), since the dynamic gear (552) is always meshed with the static gear (551), the stirring rod (51) rotates synchronously, and at this time, a plurality of the stirring blades (52) rotate synchronously around the stirring rod (51).

4. A modular groundwater treatment device according to claim 3, characterized in that: A fixing plate (22) is coaxially fixedly sleeved on the connecting pipe (21), and the fixing plate (22) is located between the inner top wall of the coagulation mixing tank (2) and the static gear (551). The adjusting member (9) is a plurality of cylinders (91) arranged on the top of the coagulation mixing tank (2), and the plurality of cylinders (91) are distributed along the circumference of the static gear (551). Each of the cylinders (91) is vertically arranged, and its piston rods are vertically slid together to penetrate the top wall of the coagulation mixing tank (2) and the fixing plate (22), and are connected to the top wall of the static gear (551). When the piston rods of the plurality of cylinders (91) are in a retracted state, the static gear (551) contacts the fixing plate (22), and at this time, the static gear (551) is away from the moving gear (552) and does not mesh with the moving gear (552).

5. A modular groundwater treatment device according to claim 4, characterized in that: A rubber pad (221) is provided on one side of the fixing plate (22) facing the static gear (551).

6. A modular groundwater treatment device according to claim 4, characterized in that: The stationary gear (551) and the movable gear (552) are a pair of meshing spur bevel gears, the outer diameter of the gear ring of the stationary gear (551) gradually decreases from top to bottom, and the outer diameter of the gear ring of the movable gear (552) gradually increases from top to bottom.

7. A modular groundwater treatment device according to claim 4, characterized in that: The coagulation mixing tank (2) is also provided with a monitoring component (6) for monitoring the water quality of sewage in the coagulation mixing tank (2). The monitoring component (6) includes a water quality detector (61) arranged in the coagulation mixing tank (2) and a controller (62) electrically connected to the water quality detector (61). The controller (62) is used to receive a detection signal from the water quality detector (61) and control the extension and retraction state of the piston rods of a plurality of cylinders (91) according to the detection signal.

8. A modular groundwater treatment device according to claim 1, characterized in that: A water suction pipe (7) is provided on the side of the coagulation stirring tank (2) away from the wastewater collection tank (1), and a separation membrane (71) for preventing floccules from entering the water suction pipe (7) is detachably provided on the end of the water suction pipe (7) extending to the coagulation stirring tank (2).

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