An apparatus for air stripping of groundwater contamination

Abstract

The application discloses a kind of air stripping devices for groundwater pollution remediation, it relates to air stripping field, including fixed seat, installation platform and air stripping pipe are fixed on the fixed seat, air stripping generating mechanism and filter are fixed on the air stripping pipe.This method is used in the process of groundwater extraction by air stripping device, and the air stripping generating mechanism can automatically clean the algae and larger sand and stone on the filter, so that the air stripping device can work continuously for a long time, effectively improve the overall working efficiency of the air stripping device.

Description

Technical Field

[0001] This invention relates to the field of air extraction, specifically an air extraction device for groundwater pollution remediation. Background Technology

[0002] Currently, when remediating groundwater pollution, groundwater needs to be extracted into designated sewage treatment equipment. However, groundwater contains a large amount of sand and gravel. If electric motors are used directly for groundwater extraction, the motors need to work continuously at high power. In addition, a large number of motors are required, resulting in high energy consumption and inconvenient installation. Once sand and gravel block the pipes, the subsequent maintenance costs such as pipe dredging are also high.

[0003] To address the above problems, this invention provides an air-lift device for groundwater pollution remediation, thereby solving the aforementioned issues. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: an air-lift device for groundwater pollution remediation, comprising:

[0005] A fixed base, on which an installation platform and an air lifting pipe are respectively fixed;

[0006] The pump body and the drain outlet are both fixed on the mounting platform, and one end of the air lifting pipe is connected to the drain outlet;

[0007] An air-lift generating mechanism is fixed at the other end of the air-lift pipe, and the pump body is connected to the air-lift generating mechanism via an air supply pipe; and

[0008] The filter is fixed to the air-lift generating mechanism.

[0009] Further, preferably, the airlift pipe has a slide rail fixed at one end near the airlift generating mechanism, and a rack is slidably disposed within the slide rail, the rack engaging with the airlift generating mechanism.

[0010] A telescopic sealing strip is fixed between the rack and the inner wall of the air lifting pipe.

[0011] Furthermore, preferably, the filter housing is fixed to the air-lift generating mechanism, and a filter screen is fixed to the side of the housing away from the air supply pipe.

[0012] Furthermore, preferably, the air supply pipe has a jet head rotatably mounted at one end within the air lifting generating mechanism, the jet head is fixed with a gear two, and the jet head rotates at an angle of 145° relative to the vertical direction, and after rotation, the angle between the jet head 71 and the filter screen is 45°.

[0013] Further, preferably, the gas-lift generating mechanism includes:

[0014] The housing is fixed to the air lifting pipe, and a crossbeam is fixed at the connection between the housing and the air lifting pipe. A gear is rotatably mounted on the crossbeam, and the gear meshes with the rack.

[0015] A differential pressure detection mechanism is slidably mounted on the housing, and rack two and rack three are respectively fixed at both ends of the differential pressure detection mechanism. Rack two meshes with gear two, and rack three meshes with gear one; and

[0016] The telescopic sealing strip three has one end fixed to the housing and the other end fixed to the rack three.

[0017] Further, preferably, the differential pressure detection mechanism includes:

[0018] A sliding plate is slidably mounted on the housing, and a telescopic sealing strip is fixed between the sliding plate and the housing; and

[0019] Two limiting components are arranged symmetrically and fixed to the housing, and control the movement of the slide plate.

[0020] Further, preferably, the limiting component includes:

[0021] A compartment body, fixed to the shell, has a rotating rod rotatably mounted inside the compartment body, and a torsion spring is provided at the point of rotation. One end of the rotating rod can limit the movement of the sliding plate; and

[0022] The limiting mechanism is fixed inside the chamber and is also fixed to the rotating rod.

[0023] Further, preferably, the limiting mechanism includes:

[0024] A limiting chamber is fixed inside the chamber, and a limiting arc, a limiting slide, and a slide rail are fixed inside the limiting chamber.

[0025] A connecting rod, fixed to the rotating rod, with a slide rail three provided inside the connecting rod, and one end of a compression spring fixed inside the slide rail three; and

[0026] A ball bearing is slidably disposed within the slide rail three and contacts the other end of the compression spring, and the ball bearing is initially located at the connection between the slide rail two and the limiting slide.

[0027] Compared with the prior art, the present invention provides an air-lift device for groundwater pollution remediation, which has the following beneficial effects:

[0028] In this invention, when the filter is clogged, the change in the internal and external pressure difference of the airlift generating mechanism will seal the airlift pipe and cause the jet nozzle to rotate, which helps the jet head to more efficiently clean algae and larger sand and gravel adhering to the filter screen, thereby improving cleaning efficiency and cleaning effect.

[0029] After the filter is cleaned, the pressure difference between the inside and outside of the air-lift generating mechanism will open the air-lift pipe and return the jet nozzle to its initial state, allowing the air-lift device to continue to work normally and effectively improving the overall working efficiency of the air-lift device. Attached Figure Description

[0030] Figure 1 A schematic diagram of an air-lift device for groundwater pollution remediation;

[0031] Figure 2 A cross-sectional view of the airlift pipe of an airlift device for groundwater pollution remediation;

[0032] Figure 3 This is a structural diagram of the air-lift generation mechanism of an air-lift device for groundwater pollution remediation.

[0033] Figure 4 This is a structural diagram of a differential pressure detection mechanism for an airlift device used in groundwater pollution remediation.

[0034] Figure 5 This is a structural diagram of a limiting component of an airlift device for groundwater pollution remediation.

[0035] Figure 6 This is a structural diagram of the limiting mechanism of an air-lift device used for groundwater pollution remediation.

[0036] In the diagram: 1. Fixed base; 2. Mounting platform; 3. Air lifting pipe; 31. Slide rail one; 32. Rack one; 33. Telescopic sealing strip one; 4. Pump body; 5. Drain outlet; 6. Air lifting generating mechanism; 61. Housing; 62. Differential pressure detection mechanism; 621. Slide plate; 622. Telescopic sealing strip two; 625. Telescopic sealing strip three; 63. Rack two; 65. Crossbeam; 66. Gear one; 69. Rack three; 7. Air supply pipe; 71. Jet nozzle; 72. Gear two; 8. Filter; 81. Fixed housing; 82. Filter screen; 9. Limiting component; 91. Chamber; 92. Rotating rod; 93. Limiting mechanism; 931. Limiting chamber; 932. Limiting arc; 933. Limiting slide; 934. Slide rail two; 935. Connecting rod; 936. Compression spring; 937. Ball bearing. Detailed Implementation

[0037] Reference Figures 1-6 This invention provides a technical solution: an air-lift device for groundwater pollution remediation, comprising:

[0038] A fixed base 1, on which an mounting platform 2 and an air lifting pipe 3 are respectively fixed;

[0039] The pump body 4 and the drain outlet 5 are both fixed on the mounting platform 2, and one end of the air lifting pipe 3 is connected to the drain outlet 5;

[0040] An air-lift generating mechanism 6 is fixed at the other end of the air-lift pipe 3, and the pump body 4 is connected to the air-lift generating mechanism 6 via an air supply pipe 7; and

[0041] The filter 8 is fixed on the air-lift generating mechanism 6.

[0042] In a preferred embodiment, the airlift pipe 3 has a slide rail 31 fixed at one end near the airlift generating mechanism 6, and a rack 32 is slidably disposed within the slide rail 31, the rack 32 engaging with the airlift generating mechanism 6.

[0043] The telescopic sealing strip 33 is fixed between the rack 32 and the inner wall of the air lifting pipe 3.

[0044] It should be noted that when there is a significant change in the pressure difference between the inside and outside of the detection tube of the airlift generating mechanism 6, i.e., when the filter 8 is blocked by mud and sand, the airlift generating mechanism 6 will cause the rack 32 to move to the right. This causes the telescopic sealing strip 33 to cooperate with the airlift generating mechanism 6 to seal the connection between the airlift pipe 3 and the airlift generating mechanism 6, creating an independent space between the airlift generating mechanism 6 and the filter 8. This helps to improve the cleaning of the filter 8 and effectively prevents large sand and algae in the groundwater from blocking the filter 8, thereby affecting the normal use of the device.

[0045] In a preferred embodiment, the fixed housing 81 of the filter 8 is fixed on the air-lift generating mechanism 6, and a filter screen 82 is fixed on the side of the fixed housing 81 away from the air supply pipe 7.

[0046] In a preferred embodiment, a jet head 71 is rotatably mounted on one end of the air supply pipe 7 within the air lifting generating mechanism 6. A gear 72 is fixed on the jet head 71, and the jet head 71 rotates at an angle of 145° relative to the vertical direction. After rotation, the angle between the jet head 71 and the filter screen 82 is 45°.

[0047] It should be noted that when the pressure difference between the inside and outside of the airlift generating mechanism 6 is large, i.e., the filter screen 82 is blocked by mud and sand, the airlift generating mechanism 6 will cause gear 2 72 to rotate, i.e., the jet head 71 will rotate at a 145° angle. After the jet head 71 rotates, it will form a 45° angle with the filter screen 82. This allows the gas inside the jet head 71 to drive the water flow and wash the filter screen 82 at a 45° angle. At the same time, because the airlift generating mechanism 6 and the filter 8 form an independent space, when the gas inside the jet head 71 is continuously ejected, the pressure inside the space will be greater than the external pressure, which will further improve the cleaning effect on the sand and algae adhering to the filter screen 82. After cleaning the filter screen 82, the airlift generating mechanism 6 will return to its initial state, thus opening the airlift pipe 3 and restoring the airlift device to normal operation, effectively improving the overall working efficiency of the airlift device.

[0048] In a preferred embodiment, the gas-lift generating mechanism 6 includes:

[0049] The housing 61 is fixed to the air lifting pipe 3, and a crossbeam 65 is fixed at the connection between the housing 61 and the air lifting pipe 3. A gear 66 is rotatably provided on the crossbeam 65, and the gear 66 meshes with the rack 32.

[0050] A differential pressure detection mechanism 62 is slidably mounted on the housing 61, and racks 63 and 69 are respectively fixed at both ends of the differential pressure detection mechanism 62. Rack 63 meshes with gear 72, and rack 69 meshes with gear 66.

[0051] The telescopic sealing strip 625 is fixed at one end to the housing 61 and at the other end to the rack 69.

[0052] It should be noted that when the filter 82 becomes clogged, it will cause a significant change in the pressure difference between the inside and outside of the housing 61, causing the pressure difference detection mechanism 62 to slide into the housing 61. During the sliding of the pressure difference detection mechanism 62, rack two 63 and rack three 69 will slide. The sliding of rack two 63 will cause gear two 72 to rotate, thus causing the jet head 71 to rotate. The sliding of rack three 69 will cause the telescopic sealing strip three 625 to slide into the housing 61. At the same time, the sliding of rack three 69 will cause sliding gear one 66 to rotate. During operation, rack 32 will slide, and the sliding of rack 32 will cause telescopic sealing strip 33 to slide into housing 61. That is, when filter screen 82 is completely blocked, telescopic sealing strip 33 and telescopic sealing strip 625, together with rack 32 and rack 69, seal the connection between air lifting mechanism 6 and air lifting pipe 3, so that air lifting mechanism 6 and filter 8 form a relatively sealed space, which is conducive to the jet head 71 to more efficiently clean algae and larger sand and gravel adhering to filter screen 82, thereby improving cleaning efficiency and cleaning effect.

[0053] In a preferred embodiment, the differential pressure detection mechanism 62 includes:

[0054] A sliding plate 621 is slidably mounted on the housing 61, and a telescopic sealing strip 622 is fixed between the sliding plate 621 and the housing 61; and

[0055] Two limiting components 9 are arranged and symmetrically fixed to the housing 61, and control the movement of the slide plate 621.

[0056] It should be noted that when filter 82 becomes clogged, the pressure difference between the inside and outside of housing 61 will increase, causing slide plate 621 to tend to slide into housing 61. At this time, due to the restriction component 9, slide plate 621 cannot slide into housing 61. As the filtration effect of filter 82 gradually weakens due to clogging, the squeezing force of slide plate 621 on restriction component 9 will continue to increase. When the filtration effect of filter 82 can no longer meet the normal operating requirements of the device, the squeezing force of slide plate 621 on restriction component 9 will cause slide plate 621 to break free from restriction component 9. The limit is set so that the slide plate 621 slides to the critical position. When the slide plate 621 slides, the air lift generating mechanism 6, together with the air lift pipe 3, seals its connection. At the same time, the jet head 71 rotates to clean the filter screen 82. After the filter screen 82 is cleaned, when the pressure difference between the inside and outside of the housing 61 returns to the initial state, the pressure difference will cause the slide plate 621 to return to the initial state. After the slide plate 621 returns to the initial state, the jet head 71 and the air lift pipe 3 will return to the initial state, so that the device continues to work normally and effectively improves the overall working efficiency of the air lift device.

[0057] It should be noted that the installation of the telescopic sealing strip 622 effectively prevents groundwater from entering the housing 61 from the connection between the housing 61 and the sliding plate 621, and prevents groundwater pollutants from jamming the sliding plate 621 and causing it to malfunction.

[0058] In a preferred embodiment, the limiting component 9 includes:

[0059] A compartment 91 is fixed to the housing 61. A rotating rod 92 is rotatably mounted inside the compartment 91, and a torsion spring is provided at the point of rotation. One end of the rotating rod 92 can limit the movement of the sliding plate 621.

[0060] The limiting mechanism 93 is fixed inside the chamber 91 and is fixed to the rotating rod 92.

[0061] It needs to be explained that when the slide plate 621 slides into the housing 61, it will cause the rotating rod 92 to rotate clockwise. Because there is a limiting mechanism 93, the rotation trend of the rotating rod 92 will be limited. That is, when the filtration efficiency of the filter screen 82 does not meet the normal operation, when the pressure difference inside the slide plate 621 increases to the sliding critical point, the rotating rod 92 will disengage from the limiting mechanism 93 and rotate clockwise, causing the slide plate 621 to disengage from the limiting of the rotating rod 92 and slide into the housing 61 until it slides to the critical point. This allows the jet head 71 to rinse the filter screen 82 at a 45° angle when cleaning the filter screen 82, improving the cleaning effect and efficiency of the filter screen 82.

[0062] It should be noted that after the filter 82 is cleaned, the pressure difference between the inside and outside of the housing 61 will be restored, which will push the slide plate 621 to slide out of the housing 61. At this time, the limiting mechanism 93 will not be able to limit the counterclockwise rotation of the rotating rod 92, thus allowing the slide plate 621 to return to its initial state.

[0063] In a preferred embodiment, the limiting mechanism 93 includes:

[0064] The limiting chamber 931 is fixed inside the chamber body 91, and the limiting arc 932, the limiting slide 933 and the slide rail 934 are fixed inside the limiting chamber 931.

[0065] A connecting rod 935 is fixed to the rotating rod 92, and a slide rail three is provided inside the connecting rod 935. One end of a compression spring 936 is fixed inside the slide rail three; and

[0066] The ball bearing 937 is slidably disposed within the slide rail three and contacts the other end of the compression spring 936. The ball bearing 937 is initially located at the connection between the slide rail two 934 and the limiting slide 933.

[0067] It needs to be explained that when the pressure difference between the inside and outside of the slide plate 621 increases to the critical point, that is, the clockwise rotation torque of the rotating rod 92, under the action of the limiting arc 932, will cause the ball 937 to slide down and compress the compression spring 936, thereby causing the ball 937 to enter the limiting slide 933, so that the rotating rod 92 can get rid of the limitation arc 932 and rotate clockwise under the action of the slide plate 621 until the slide plate 621 disengages from the rotating rod 92, so that the slide plate 621 can slide directly to the critical point. Thus, when cleaning the filter screen 82, the jet head 71 can rinse the filter screen 82 at a 45° angle, improving the cleaning effect and efficiency of the filter screen 82.

[0068] In practice, the pump body 4 is started, so that compressed gas is sprayed from the nozzle 71 from bottom to top through the air-lift generating mechanism 6 to extract groundwater. When impurities in the groundwater clog the filter 8, the air-lift generating mechanism 6 will rotate the nozzle 71 by 145°, so that the nozzle 71 washes the algae and larger sand on the filter screen 82 at a 45° angle, improving the cleaning effect and efficiency of the filter screen 82. After cleaning the filter screen 82, it returns to the initial working state, effectively improving the overall working efficiency of the air-lift device.

[0069] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An apparatus for groundwater remediation by air stripping, characterized by: The utility model relates to a kind of air-lift pumping device, including: Fixed seat (1), installation platform (2) and air-lift tube (3) are respectively fixed on the fixed seat (1); Pump body (4), drain (5) are all fixed on the installation platform (2), and one end of the air-lift tube (3) is connected with the drain (5); Air-lift generating mechanism (6) is fixed at the other end of the air-lift tube (3), and the pump body (4) is connected with the air-lift generating mechanism (6) by gas pipe (7); Filter (8) is fixed at the lower end of the air-lift generating mechanism (6); The air-lift tube (3) is fixed with slide rail one (31) at one end close to the air-lift generating mechanism (6), rack one (32) is slidably arranged in the slide rail one (31), the rack one (32) can be engaged with the air-lift generating mechanism (6), and the rack one (32) is fixed with telescopic sealing belt one (33) between the inner wall of the air-lift tube (3); The fixed shell (81) of the filter (8) is fixed on the air-lift generating mechanism (6), and filter screen (82) is fixed on the side of the fixed shell (81) away from the gas pipe (7); The gas pipe (7) is rotatably installed with jet head (71) at one end in the air-lift generating mechanism (6), and gear two (72) is fixed on the jet head (71); The air-lift generating mechanism (6) includes: Housing (61) is fixed at the lower end of the air-lift tube (3), and crossbeam (65) is fixed at the connection of the housing (61) and the air-lift tube (3), gear one (66) is rotatably arranged on the crossbeam (65), and the gear one (66) is engaged with the rack one (32); Pressure difference detection mechanism (62) is slidably arranged on the housing (61), and rack two (63) and rack three (69) are respectively fixed at two ends of the pressure difference detection mechanism (62), the rack two (63) is engaged with the gear two (72), and the rack three (69) is engaged with the gear one (66); Telescopic sealing belt three (625) is fixed at one end of the housing (61), and the other end is fixed on the rack three (69); The pressure difference detection mechanism (62) includes: Slide plate (621) is slidably arranged on the housing (61), and telescopic sealing belt two (622) is fixed between the slide plate (621) and the housing (61); Limiting assembly (9) is arranged as two, symmetrically fixed on the housing (61), and the movement of the slide plate (621) is controlled; When the clogging filtering effect of the filter screen (82) gradually weakens, the extrusion force of the sliding plate (621) on the limiting assembly (9) will continue to increase, and when the filtering effect of the filter screen (82) cannot meet the normal working requirements of the device, the extrusion force of the sliding plate (621) on the limiting assembly (9) will make the sliding plate (621) get rid of the limitation of the limiting assembly (9), so that the sliding plate (621) slides to the critical position. When the sliding plate (621) slides, the air stripping generating mechanism (6) cooperates with the air stripping pipe (3) to close the connection thereof, and at the same time, the air jet head (71) is rotated to clean the filter screen (82).

2. The apparatus of claim 1, wherein: The air jet head (71) can rotate by an angle of 145° relative to the vertical direction, and the included angle between the air jet head (71) and the filter screen (82) after rotation is 45°.

3. The apparatus of claim 1, wherein: The limiting assembly (9) comprises: a warehouse body (91) fixed on the shell (61), a rotating rod (92) rotatably installed in the warehouse body (91), and a torsional spring arranged at the rotating position of the rotating rod (92), one end of the rotating rod (92) being capable of position-limiting control on the sliding plate (621); a limiting mechanism (93) fixed in the warehouse body (91) and fixed with the rotating rod (92).

4. The apparatus of claim 3, wherein: The limiting mechanism (93) comprises: a limiting warehouse (931) fixed in the warehouse body (91), and a limiting arc (932), a limiting slide (933) and a sliding rail two (934) fixed in the limiting warehouse (931); a connecting rod (935) fixed on the rotating rod (92), a sliding rail three being formed in the connecting rod (935), and one end of a compression spring (936) being fixed in the sliding rail three; a ball (937) slidably arranged in the sliding rail three and contacting the other end of the compression spring (936), and the ball (937) being initially located at the connecting position of the sliding rail two (934) and the limiting slide (933).

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