Self-cleaning shale gas flowback sewage filtering device

Abstract

The utility model relates to the technical field of shale gas flowback sewage filtering, and discloses a self-cleaning shale gas flowback sewage filtering device which comprises a bottom plate, the output end of a first motor is fixedly connected with a first rotating shaft, and the interiors of two fixing grooves are slidably connected with a first filtering plate and a second filtering plate respectively. Second spherical protrusions are fixedly connected to one side of the first filter plate and one side of the second filter plate, first spherical protrusions are fixedly connected to two positions of the outer side of a first rotating shaft, stirring blades are fixedly connected to the outer side of a second rotating shaft, a feeding port is fixedly connected to one side of a first box body, and a reaction tank is fixedly connected to the middle of a fixing plate. According to the sewage treatment device, large sand and stones in returned sewage are filtered out through the first filter plate, small sand and stones and sludge are filtered out through the second filter plate, the first rotating shaft is driven by the first driving motor to rotate, so that the first spherical bulge and the second spherical bulge extrude each other, the first filter plate and the second filter plate shake left and right, filter holes are prevented from being blocked, and the filtering effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shale gas return sewage filtering, in particular to a self-cleaning shale gas return sewage filtering device. Background Art

[0002] Shale gas is a natural gas, mainly composed of methane, which exists in underground shale rock formations. Shale gas flowback refers to the wastewater that flows back to the surface after the natural gas is released through hydraulic fracturing during shale gas extraction. The treatment and disposal of flowback wastewater is an important environmental protection and environmental management issue in shale gas extraction.

[0003] After searching the Chinese patent document with the announcement number CN207237451U, a self-cleaning shale gas return sewage filtering device is provided, which includes a sewage pipe and a filter screen. The filter screen is arranged in the sewage pipe. A slag discharge pipe and a flushing pipe are connected and arranged on the sewage pipe on the filter screen and downstream respectively. The flushing pipe is provided with a water supply device. Valves are arranged on the slag discharge pipe and the flushing pipe, and valves are also arranged on the sewage pipe upstream of the slag discharge pipe and the sewage pipe downstream of the flushing pipe. The problem of the existing equipment's filter screen being difficult to clean, the filtered residue being difficult to clean out of the sewage pipe, and the sewage pipe being easy to be blocked is solved.

[0004] However, in this patent, there is a large amount of sand and silt in the return sewage, and the filtering effect is not good if it is filtered only by the filter net. In addition, there are a large number of impurities such as chemicals added during the hydraulic fracturing process and dissolved substances in natural gas in the return sewage. If they are not removed, the filtered water will not meet the emission standards. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a self-cleaning shale gas return sewage filtration device, which aims to improve the problem in the prior art that the filtration effect of the filter net alone is poor and other impurities are not removed and the filtered water does not meet the discharge standards.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a self-cleaning shale gas return sewage filtering device, comprising a bottom plate, the top surface of the bottom plate is fixedly connected to a box body 1 and a pumping assembly, the top surface of the box body 1 is fixedly connected to a box body 2, the top surface of the box body 2 is fixedly connected to a motor 1, the output end of the motor 1 is fixedly connected to a rotating shaft 1, the rotating shaft 1 is rotatably connected to one side of the interior of the box body 2, one side of the inner wall of the box body 2 is fixedly connected to fixed grooves on the upper and lower sides, a plurality of springs are arranged inside the fixed grooves, and the interiors of the two fixed grooves are respectively slidably connected to Filter plate 1 and filter plate 2, one side of each of the filter plate 1 and the filter plate 2 is fixedly connected with spherical protrusion 2, two outer sides of the rotating shaft 1 are fixedly connected with spherical protrusion 1, one outer side of the box body 1 is fixedly connected with a support plate, the top surface of the support plate is fixedly connected with motor 2, the output end of the motor 2 is fixedly connected with rotating shaft 2, the outer side of the rotating shaft 2 is fixedly connected with a stirring blade, one side of the box body 1 is fixedly connected with a feed port, the interior of the box body 1 is fixedly connected with a fixing plate, the middle part of the fixing plate is fixedly connected with a reaction tank, and the bottom of the reaction tank is fixedly connected with a drain pipe.

[0007] As a further description of the above technical solution:

[0008] The pumping assembly comprises a water pump, a connecting pipe and a water suction pipe. The ground of the water pump is fixedly connected to the top surface of the bottom plate, and the two sides of the water pump are respectively fixedly connected to one end of the connecting pipe and the water suction pipe.

[0009] As a further description of the above technical solution:

[0010] The other end of the connecting pipe is fixedly connected to one side of the top of the second box body, and the other end of the water suction pipe faces the ground.

[0011] As a further description of the above technical solution:

[0012] One end of the plurality of springs in the two fixing grooves is respectively close to one side of the first filter plate and the second filter plate.

[0013] As a further description of the above technical solution:

[0014] The inner wall of the second box body is fixedly connected with three sealing plates, and the top surface and the bottom surface of the first filter plate and the second filter plate slide between two adjacent sealing plates respectively.

[0015] As a further description of the above technical solution:

[0016] The plurality of spherical protrusions 1 at two locations outside the rotating shaft 1 are in an annular array, and the spherical protrusions 1 and spherical protrusions 2 are arranged alternately.

[0017] As a further description of the above technical solution:

[0018] The end of the feed port is located above the stirring blade, the fixing plate is located below the stirring blade, and the drainage pipe runs through the bottom and bottom plate of the box body.

[0019] As a further description of the above technical solution:

[0020] The middle part of the drainage pipe is fixedly connected with multiple filters, and the four corners of the bottom surface of the bottom plate are fixedly connected with support columns.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the return sewage is pumped into the interior of the box body 2 through the pumping assembly, so that the filter plate 1 filters out larger sand and gravel, and the filter plate 2 filters out smaller sand and gravel and sludge. The driving motor 1 drives the rotating shaft 1 to rotate, so that the spherical protrusion 1 and the spherical protrusion 2 are squeezed against each other, and then the filter plate 1 and the filter plate 2 shake left and right to prevent the filter holes from being blocked, thereby improving the filtering effect and removing large particles of impurities in the return sewage.

[0023] 2. In the utility model, the filtered return sewage without large particles of impurities enters the interior of the box body one, and the reactants are added through the feed port, so that the reactants and the chemicals and dissolved substances in the sewage fall into the reaction tank. During the process, the driving motor two drives the rotating shaft two to rotate, and the rotating shaft two drives the stirring blade to rotate, which accelerates the reaction efficiency. After sufficient reaction in the reaction tank, it is discharged from the drain pipe after passing through multiple filters. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural schematic diagram of a self-cleaning shale gas return sewage filtering device proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of a box of a self-cleaning shale gas return sewage filtering device proposed by the utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of a box body 2 of a self-cleaning shale gas return sewage filtering device proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the reaction tank portion of a self-cleaning shale gas return wastewater filtering device proposed in the utility model.

[0028] Legend:

[0029] 1. Bottom plate; 2. Box body 1; 3. Box body 2; 4. Water pump; 5. Connecting pipe; 6. Motor 1; 7. Rotating shaft 1; 8. Spherical protrusion 1; 9. Fixing groove; 10. Spring; 11. Filter plate 1; 12. Filter plate 2; 13. Spherical protrusion 2; 14. Feed inlet; 15. Support plate; 16. Motor 2; 17. Rotating shaft 2; 18. Stirring blade; 19. Fixing plate; 20. Reaction tank; 21. Drain pipe; 22. Multiple filters; 23. Suction pipe; 24. Support column; 25. Sealing plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the specification of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1-3The utility model provides an embodiment: a self-cleaning shale gas return sewage filtering device, comprising a bottom plate 1, a box body 2 and a pumping assembly are fixedly connected to the top surface of the bottom plate 1, a box body 2 3 is fixedly connected to the top surface of the box body 2, and the return sewage is sucked into and injected into the interior of the box body 2 3 by driving the pumping assembly. A motor 16 is fixedly connected to the top surface of the box body 2 3, a rotating shaft 17 is fixedly connected to the output end of the motor 16, and the rotating shaft 7 is rotatably connected to one side of the interior of the box body 2 3, and a fixed groove 9 is fixedly connected to the upper and lower sides of one side of the inner wall of the box body 2 3, and a plurality of springs 10 are arranged inside the fixed groove 9, and a filter plate 11 and a filter plate 2 12 are slidably connected to the interior of the two fixed grooves 9, respectively, and a spherical protrusion 2 13 is fixedly connected to one side of the filter plate 11 and the filter plate 2 12, and a spherical protrusion 8 is fixedly connected to the two outer sides of the rotating shaft 7 by driving the motor 16, so that It drives the rotating shaft 7 to rotate, thereby driving the two protrusions 1 at the outer side of the rotating shaft 7 to rotate, so that the spherical protrusion 18 and the spherical protrusion 2 13 squeeze each other, and a part of the filter plate 11 and the filter plate 2 12 slide in the groove of the fixed groove 9 and squeeze the spring 10, and the spring 10 rebounds to restore it, and then the filter plate 11 and the filter plate 2 12 shake left and right. The filter plate 11 is arranged above the filter plate 2 12 and thus the filter plate 11 has a larger filter hole than the filter plate 2 12. Larger sand and gravel are filtered out through the filter plate 11, and smaller sand and gravel and sludge are filtered out through the filter plate 2 12. A support plate 15 is fixedly connected to one side of the outer side of the box body 2, and a motor 2 16 is fixedly connected to the top surface of the support plate 15. The support plate 15 serves to fix the motor 2 16 to the outside of the box body 2. A rotating shaft 2 17 is fixedly connected to the output end of the motor 2 16, and a stirring blade 18 is fixedly connected to the outer side of the rotating shaft 2 17. A feed port 14 is fixedly connected to one side of the box body 2, and a fixed plate 19 is fixedly connected to the inside of the box body 2. A reaction tank 20 is fixedly connected to the middle of the fixed plate 19, and a drain pipe 21 is fixedly connected to the bottom of the reaction tank 20. Reactants are added through the feed port 14, so that the reactants and chemicals and dissolved substances in the sewage fall into the reaction tank 20. During the process, the motor 2 16 is driven to drive the rotating shaft 2 17 to rotate, so that the rotating shaft 17 drives the stirring blade 18 to rotate, and the stirring blade 18 makes the sewage and the reactants fully mixed and reacted, thereby accelerating the reaction efficiency.

[0032] Reference Figure 1 The pumping assembly includes a water pump 4, a connecting pipe 5 and a water suction pipe 23. The ground of the water pump 4 is fixedly connected to the top surface of the bottom plate 1, and the two sides of the water pump 4 are respectively fixedly connected to the connecting pipe 5 and one end of the water suction pipe 23. The other end of the connecting pipe 5 is fixedly connected to one side of the top of the box body 23, and the other end of the water suction pipe 23 faces the ground. The water suction pipe 23 is inserted into the equipment storing the backflow sewage or connected to the relevant pipeline, so that when the water pump 4 is driven, the backflow sewage is sucked into the inside of the connecting pipe 5 and then flows into the corresponding part.

[0033] Reference Figure 2 , one end of the multiple springs 10 in the two fixing grooves 9 is respectively close to one side of the filter plate 11 and the filter plate 2 12. Three sealing plates 25 are fixedly connected to the inner wall of the box body 2 3, and the top and bottom surfaces of the filter plates 11 and 12 slide between two adjacent sealing plates 25. The multiple spherical protrusions 18 at two locations outside the rotating shaft 17 are in an annular array, and the spherical protrusions 18 and the spherical protrusions 2 13 are arranged alternately. Through the multiple spherical protrusions 8 in an annular array, when the rotating shaft 7 rotates, the spherical protrusion 8 squeezes the spherical protrusion 2 13, thereby driving one side of the filter plate 11 and the filter plate 2 12 to slide in the two fixed grooves 9 respectively, thereby squeezing the spring 10, and the spring 10 rebounds to restore it, and then the filter plate 11 and the filter plate 2 12 shake left and right, and the other side of the filter plate 11 and the filter plate 2 12 slides between two adjacent sealing plates 25. The sealing plate 25 limits the position of the filter plate 11 and the filter plate 2 12, and also prevents sewage from flowing to other places.

[0034] Reference Figure 1 , Figure 3 and Figure 4 The end of the feed port 14 is located above the stirring blade 18, and the reactants fed from the feed port 14 will fall from above and mix with the sewage. The fixed plate 19 is located below the stirring blade 18, so that the mixture after stirring and accelerating the reaction falls into the reaction tank 20 for further reaction. The drain pipe 21 runs through the bottom of the box body 2 and the bottom plate 1 for discharge. The middle of the drain pipe 21 is fixedly connected with a multiple filter 22, and the four corners of the bottom surface of the bottom plate 1 are fixedly connected with support columns 24. The function of the support column 24 is to fix the entire device. The reacted mixture is filtered through the multiple filters 22, so that clean water is discharged from the drain pipe 21.

[0035] Working principle: When in use, by driving the water pump 4, the suction pipe 23 sucks the return sewage, and then injects it into the box body 2 3 through the connecting pipe 5, and falls from the top of the box body 2 3. The filter plate 11 is arranged above the filter plate 2 12 and the filter plate 11 has a larger filter hole than the filter plate 2 12. The larger sand and gravel are filtered out by the filter plate 11, and the smaller sand and gravel and sludge are filtered out by the filter plate 2 12. When the filtration amount reaches a certain level, the filter hole may be blocked. By driving the motor 1 6, the rotating shaft 1 7 is driven to rotate, so that The two protrusions at the outer side of the rotating shaft 7 are driven to rotate, so that the spherical protrusion 18 and the spherical protrusion 2 13 are squeezed against each other, and a part of the filter plate 11 and the filter plate 2 12 slide in the groove of the fixed groove 9 and squeeze the spring 10, and the spring 10 rebounds to restore it, and then the filter plate 11 and the filter plate 2 12 shake left and right. The sealing plate 25 limits the position of the filter plate 11 and the filter plate 2 12, and also prevents the sewage from flowing to other places. By shaking left and right, the filter holes are prevented from being blocked, the filtering effect is improved, and the large particles of impurities in the returned sewage are removed. The filtered return sewage without large particles of impurities enters the interior of the box 2, and the reactants are added through the feed port 14, so that the reactants and the chemicals and dissolved substances in the sewage fall into the reaction tank 20. During the process, the motor 2 16 is driven to drive the shaft 2 17 to rotate, and the shaft 2 17 drives the stirring blade 18 to rotate. The stirring blade 18 makes the sewage and the reactants fully mixed and reacted, thereby accelerating the reaction efficiency. After sufficient reaction in the reaction tank 20, it is filtered through the multiple filters 22 in the middle of the drain pipe 21, and then the clean water is discharged from the drain pipe 21. The drain pipe 21 can also be connected to a storage device for collection.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-cleaning shale gas flowback sewage filtering device, comprising a bottom plate (1), characterized in that: The top surface of the bottom plate (1) is fixedly connected to a box body (2) and a pumping assembly, the top surface of the box body (2) is fixedly connected to a box body (3), the top surface of the box body (3) is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to a rotating shaft (7), the rotating shaft (7) is rotatably connected to one side of the interior of the box body (3), one side of the inner wall of the box body (3) is fixedly connected to a fixing groove (9) at the top and bottom, a plurality of springs (10) are arranged inside the fixing groove (9), the insides of the two fixing grooves (9) are respectively slidably connected to a filter plate (11) and a filter plate (12), and one side of the filter plate (11) and the filter plate (12) are fixedly connected to a ball The invention relates to a housing body 1 (2) and a housing body 1 (2). The housing body 1 (2) is provided with a spherical protrusion 1 (13), two places on the outer side of the rotating shaft 1 (7) are fixedly connected with spherical protrusions 1 (8), one side of the outer side of the housing body 1 (2) is fixedly connected with a support plate (15), the top surface of the support plate (15) is fixedly connected with a motor 2 (16), the output end of the motor 2 (16) is fixedly connected with a rotating shaft 2 (17), the outer side of the rotating shaft 2 (17) is fixedly connected with a stirring blade (18), one side of the housing body 1 (2) is fixedly connected with a feed port (14), the interior of the housing body 1 (2) is fixedly connected with a fixing plate (19), the middle part of the fixing plate (19) is fixedly connected with a reaction tank (20), and the bottom of the reaction tank (20) is fixedly connected with a drain pipe (21).

2. A self-cleaning shale gas return wastewater filtering device according to claim 1, characterized in that: The water pumping assembly comprises a water pump (4), a connecting pipe (5) and a water suction pipe (23); the ground surface of the water pump (4) is fixedly connected to the top surface of the base plate (1); and the two sides of the water pump (4) are respectively fixedly connected to one end of the connecting pipe (5) and the water suction pipe (23).

3. A self-cleaning shale gas return wastewater filtering device according to claim 2, characterized in that: The other end of the connecting pipe (5) is fixedly connected to one side of the top of the second box body (3), and the other end of the water suction pipe (23) faces the ground.

4. A self-cleaning shale gas return wastewater filtering device according to claim 1, characterized in that: One end of a plurality of springs (10) inside the two fixing grooves (9) is respectively close to one side of the filter plate 1 (11) and the filter plate 2 (12).

5. The self-cleaning shale gas return wastewater filtering device according to claim 1, characterized in that: The inner wall of the second box body (3) is fixedly connected with three sealing plates (25), and the top surface and bottom surface of the first filter plate (11) and the second filter plate (12) slide between two adjacent sealing plates (25) respectively.

6. The self-cleaning shale gas return wastewater filtering device according to claim 1, characterized in that: The multiple spherical protrusions (8) at two locations outside the rotating shaft (7) are arranged in a ring array, and the spherical protrusions (8) and the spherical protrusions (13) are arranged alternately.

7. The self-cleaning shale gas return sewage filtering device according to claim 1, characterized in that: The end of the feed port (14) is located above the stirring blade (18), the fixing plate (19) is located below the stirring blade (18), and the drainage pipe (21) passes through the bottom of the box body (2) and the bottom plate (1).

8. The self-cleaning shale gas return wastewater filtering device according to claim 1, characterized in that: A multiple filter (22) is fixedly connected to the middle of the drainage pipe (21), and support columns (24) are fixedly connected to the four corners of the bottom surface of the bottom plate (1).

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