Shale gas exploitation oil-based sludge treatment device

Abstract

The utility model discloses a shale gas exploitation oil-based sludge treatment device which comprises a treatment tank, a top motor is installed in the center of the top face of the treatment tank, a sealing ring is attached to the inner wall of an adding cylinder, a dispersing filter screen is fixedly installed at the bottom end of the adding cylinder, and an adjusting sleeve is installed on the other side of the top face of the treatment tank in a penetrating mode through a bearing seat. A suction pipe penetrates through the center of the adjusting sleeve, a water spraying pipe penetrates through the top of one side of the treatment tank, a sludge pipe is installed at the bottom end of the treatment tank, the tail end of the sludge pipe is connected with the top of one end of the airing groove, and an observation window is installed on the vertical wall of the treatment tank. According to the shale gas exploitation oil-based sludge treatment device, a novel structural design is adopted, oil-based sludge is fully dispersed in flocculation liquid medicine, the mixed precipitation effect of the flocculation liquid medicine is guaranteed, toxic chemical substances such as polycyclic aromatic hydrocarbon and benzene in the sludge are separated out and layered with water, and separation and extraction are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-based sludge disposal devices, in particular to an oil-based sludge disposal device for shale gas extraction. Background Technique

[0002] Shale gas extraction generally uses hydraulic fracturing technology, also known as "hydraulic fracture" technology. In this process, in order to fracture the shale layer and release natural gas, special oil-based fracturing fluids are required. When these oil-based fracturing fluids are mixed with the soil in the shale layer, an oily sludge is formed, namely oil-based cuttings or oil-based sludge. These sludges contain toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene, as well as harmful substances such as heavy metals, posing a potential threat to the environment and human health.

[0003] In the existing oil-based sludge disposal device for shale gas extraction, such as the Chinese utility model patent with the publication number CN216445228U named an oil-based sludge disposal device for shale gas extraction, it includes a mixing tank and a drying tank. A motor is fixedly connected to the left side of the mixing tank. The power output end of the motor is fixedly connected to a transmission rod. A spiral blade is fixedly connected to the surface of the transmission rod. A communicating pipe is opened on the right side of the spiral blade. A valve a is installed in the middle section of the communicating pipe. A filter plate is fixedly connected below the spiral blade. Exhaust holes are evenly arranged on the upper surface of the drying tank. A plurality of hot air blowers are installed on the inner side wall of the drying tank. A receiving plate is movably connected to the right side wall of the drying tank. A handle is fixedly connected to the right side of the receiving plate. In this patent solution, only simple hot air drying of the sludge is carried out and flocculants are used for adsorption precipitation. When processing, the sludge is not fully dispersed, the medicament cannot be fully mixed with the impurities in the sludge, and the toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene contained in the sludge cannot be fully separated and stratified, resulting in a poor overall treatment effect. Therefore, it is necessary to design an oil-based sludge disposal device for shale gas extraction to address the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an oil-based sludge disposal device for shale gas extraction, so as to solve the problems raised in the above background technique that when the existing device is processing, the sludge is not fully dispersed, the medicament cannot be fully mixed with the impurities in the sludge, the toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene contained in the sludge cannot be fully separated and stratified, and the overall treatment effect is poor.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A device for disposing oil-based sludge in shale gas extraction, comprising a treatment tank. A top motor is installed at the center of the top surface of the treatment tank. A middle dispersion fan blade is installed on the output shaft at the bottom of the top motor. An adding cylinder is installed in a hole opened on one side of the top surface of the treatment tank. A blocking plate is fixed on the outer wall of the adding cylinder. An adding window is opened at the top of one side of the adding cylinder. A hydraulic rod is fixedly penetrated through the top end of the adding cylinder. A pushing plate is fixedly installed at the bottom end of the hydraulic rod. A sealing ring is installed on the side surface of the pushing plate. The sealing ring is attached to the inner wall of the adding cylinder. A dispersion filter screen is fixedly installed at the bottom end of the adding cylinder. An adjusting sleeve is penetrated and installed through a bearing seat on the other side of the top surface of the treatment tank. A suction pipe is penetrated and installed through the center of the adjusting sleeve. A water spraying pipe is penetrated and installed at the top of one side of the treatment tank. A sludge pipe is installed at the bottom end of the treatment tank. The end of the sludge pipe is connected to the top of one end of a drying trough. An observation window is installed on the vertical wall of the treatment tank.

[0006] Preferably, bottom motors are symmetrically installed on both sides at the bottom end of the treatment tank. The end of the output shaft of the bottom motor is fixedly installed with a bottom dispersion fan blade. The diameter of the bottom dispersion fan blade is not less than the radius of the middle dispersion fan blade.

[0007] Preferably, the length of the hydraulic rod is not less than 3 / 4 of the length of the adding cylinder. The adding cylinder is threadedly connected to a hole opened on one side of the top surface of the treatment tank.

[0008] Preferably, the adjusting sleeve and the suction pipe are threadedly connected. A stabilizing block is fixed on one side of one end of the adjusting sleeve. The end of the stabilizing block is attached to the inner wall of a track groove. The track groove is opened on one side of the inner wall of the treatment tank.

[0009] Preferably, the end of the stabilizing block is slidably connected to the track groove. The length of the track groove is not less than half of the overall height of the treatment tank.

[0010] Preferably, the water spraying pipe is inclined. The center of the water spraying pipe and the center of the adding cylinder are in the same vertical plane. The end of the water spraying pipe is located below the adding cylinder.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The device for disposing oil-based sludge in shale gas extraction adopts a novel structural design, fully disperses the oil-based sludge in the flocculating liquid medicine, not only ensures the mixing and precipitation effect of the flocculating liquid medicine, but also separates toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene contained in the sludge, separates them from water, and is convenient for separation and extraction.

[0012] 1. The hydraulic rod drives the pusher plate to move vertically to extrude the oil-based sludge through the dispersion filter screen, which can not only intercept the solid impurities contained, but also disperse the sludge. At the same time, it cooperates with the high-speed liquid medicine water flow sprayed by the water spray pipe to disperse the oil-based sludge again, ensuring that the polycyclic aromatic hydrocarbons, benzene and other toxic chemical substances contained in the oil-based sludge can be separated. Moreover, the addition cylinder can be conveniently disassembled and cleaned;

[0013] 2. The middle dispersion fan blade and the bottom dispersion fan blade fully stir the liquid medicine and the sludge to ensure the precipitation effect of the flocculating agent. At the same time, the oil-based sludge is dispersed again in the water, facilitating the separation of polycyclic aromatic hydrocarbons, benzene and other toxic chemical substances contained in the oil-based sludge. And the bottom height of the suction pipe can be conveniently adjusted by rotation, facilitating the complete extraction of polycyclic aromatic hydrocarbons, benzene and other toxic chemical substances and water after precipitation layering. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view structural schematic diagram of the present utility model;

[0015] Figure 2 is a front view sectional structural schematic diagram of the treatment tank of the present utility model;

[0016] Figure 3 is a front view sectional structural schematic diagram of the addition cylinder of the present utility model;

[0017] Figure 4 is a bottom view sectional structural schematic diagram of the stabilizing block and the track groove of the present utility model.

[0018] In the figure: 1, treatment tank; 2, top motor; 3, middle dispersion fan blade; 4, addition cylinder; 5, baffle plate; 6, addition window; 7, hydraulic rod; 8, pusher plate; 9, sealing ring; 10, dispersion filter screen; 11, adjusting sleeve; 12, suction pipe; 13, stabilizing block; 14, track groove; 15, water spray pipe; 16, bottom motor; 17, bottom dispersion fan blade; 18, sludge pipe; 19, drying tank; 20, observation window. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-4, the present utility model provides a technical solution: a device for disposing oil-based sludge in shale gas exploitation, which includes a treatment tank 1, a top motor 2, a middle dispersion fan blade 3, an addition cylinder 4, a baffle plate 5, an addition window 6, a hydraulic rod 7, a pushing plate 8, a sealing ring 9, a dispersion filter screen 10, an adjusting sleeve 11, a suction pipe 12, a stabilizing block 13, a track groove 14, a water spray pipe 15, a bottom motor 16, a bottom dispersion fan blade 17, a sludge pipe 18, a drying trough 19 and an observation window 20. A top motor 2 is installed at the center of the top surface of the treatment tank 1. A middle dispersion fan blade 3 is installed on the output shaft at the bottom of the top motor 2. An addition cylinder 4 is installed in the hole opened on one side of the top surface of the treatment tank 1. A baffle plate 5 is fixed on the outer wall of the addition cylinder 4. An addition window 6 is opened at the top of one side of the addition cylinder 4. A hydraulic rod 7 is fixedly installed through the top end of the addition cylinder 4. A pushing plate 8 is fixedly installed at the bottom end of the hydraulic rod 7. A sealing ring 9 is installed on the side surface of the pushing plate 8, and the sealing ring 9 is attached to the inner wall of the addition cylinder 4. A dispersion filter screen 10 is fixedly installed at the bottom end of the addition cylinder 4. An adjusting sleeve 11 is installed through the other side of the top surface of the treatment tank 1 through a bearing seat. A suction pipe 12 is installed through the center of the adjusting sleeve 11. A water spray pipe 15 is installed through the top of one side of the treatment tank 1. A sludge pipe 18 is installed at the bottom end of the treatment tank 1, and the end of the sludge pipe 18 is connected to the top of one end of the drying trough 19. An observation window 20 is installed on the vertical wall of the treatment tank 1.

[0021] In this example, bottom motors 16 are symmetrically installed on both sides at the bottom end of the treatment tank 1. The end of the output shaft of the bottom motor 16 is fixedly installed with a bottom dispersion fan blade 17. The diameter of the bottom dispersion fan blade 17 is not less than the radius of the middle dispersion fan blade 3. The above structural design ensures that the middle dispersion fan blade 3 and the bottom dispersion fan blade 17 can fully disperse the sludge in water, make the sludge fully mixed with the medicament, and ensure the separation of toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene.

[0022] The length of the hydraulic rod 7 is not less than 3 / 4 of the length of the addition cylinder 4. The addition cylinder 4 and the hole opened on one side of the top surface of the treatment tank 1 are in threaded connection. The above structural design ensures that the hydraulic rod 7 can stably push the pushing plate 8 downward, push the sludge downward through the dispersion filter screen 10, and the addition cylinder 4 can be conveniently disassembled to clean the solid impurities intercepted on the inner part and the bottom dispersion filter screen 10.

[0023] The adjusting sleeve 11 and the suction pipe 12 are in threaded connection. A stabilizing block 13 is fixed on one side of one end of the adjusting sleeve 11. The end of the stabilizing block 13 is attached to the inner wall of the track groove 14. The track groove 14 is opened on one side of the inner wall of the treatment tank 1. The above structural design enables the adjusting sleeve 11 to drive the suction pipe 12 with the stabilizing block 13 to move stably in a straight line along the track groove 14 when rotating by using the threaded connection relationship.

[0024] The end of the stabilizing block 13 is slidably connected to the track groove 14, and the length of the track groove 14 is not less than half of the overall height of the treatment tank 1. The above structural design ensures that the suction pipe 12 can only move linearly, and the height of the bottom end of the suction pipe 12 can be adjusted conveniently within a large range, facilitating the independent suction of layered water and toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene.

[0025] The water spray pipe 15 is inclined, the center of the water spray pipe 15 and the center of the addition cylinder 4 are in the same vertical plane, and the end of the water spray pipe 15 is located below the addition cylinder 4. The above structural design can use high-speed water flow to disperse the falling sludge and improve the dispersion effect of the sludge.

[0026] Working principle: When using this device, first add the sludge to be treated into the addition cylinder 4 through the Figure 3 adding window 6, start the hydraulic rod 7 to extend and push the pushing disk 8 downward, extrude the sludge to fall through the dispersion filter screen 10, and the sludge is dispersed when passing through the dispersion filter screen 10, while the solid impurities are intercepted by the dispersion filter screen 10;

[0027] Subsequently, through the Figure 2 water pump connected to the water spray pipe 15, spray the water mixed with the flocculant at high speed, and the water flow impacts the sludge falling from the dispersion filter screen 10 to disperse the sludge. Continuously perform the above steps until it is observed through the observation window 20 that the liquid level in the treatment tank 1 is higher than the Figure 2 topmost dispersion fan blade 3 in the

[0028] Stop adding sludge and introducing the medicated water, start the top motor 2 and the bottom motor 16, use the water flow to disperse the sludge again, and make the sludge fully mixed with the medicament. The flocculant combines with the impurities to form flocs, and the toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene that cannot react in the sludge are separated from the sludge during the dispersion process. Then close the top motor 2 and the bottom motor 16 for static precipitation. The sludge and the flocculated impurities form a precipitate at the bottom end of the treatment tank 1, the middle layer is water, and the top layer is toxic chemical substances such as polycyclic aromatic hydrocarbons and benzene with a density less than that of water;

[0029] Rotate the adjusting sleeve 11, and the adjusting sleeve 11 drives the suction pipe 12 with the stabilizing block 13 to slide vertically upward along the track groove 14 by means of the threaded connection. Observe through the observation window 20 until the bottom end of the suction pipe 12 is located at the bottom of the topmost layer of polycyclic aromatic hydrocarbons, benzene and other toxic chemical substances. Stop rotating the adjusting sleeve 11, and fix the position of the suction pipe 12 by means of thread self-locking. Start the suction pump connected to the suction pipe 12 to completely extract the layer of polycyclic aromatic hydrocarbons, benzene and other toxic chemical substances. Then rotate the adjusting sleeve 11 in the reverse direction to lower the suction pipe 12 until the bottom end of the suction pipe 12 is located at the bottom of the water layer, and extract and collect the water for treatment. Finally, open the sludge pipe 18 to discharge the bottom sediment into the sludge pipe 18 for drying and dehydration. This is the working principle of the shale gas extraction oil-based sludge disposal device.Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A shale gas production oil-based sludge treatment device, comprising a treatment tank (1), characterized in that: A top motor (2) is installed at the center of the top surface of the processing tank (1), and a central dispersing fan blade (3) is installed on the bottom output shaft of the top motor (2). An addition cylinder (4) is installed in a hole opened on one side of the top surface of the processing tank (1), and a blocking plate (5) is fixed on the outer wall of the addition cylinder (4). An addition window (6) is opened on the top of one side of the addition cylinder (4), and a hydraulic rod (7) is fixedly passed through the top of the addition cylinder (4). A push plate (8) is fixedly installed at the bottom end of the hydraulic rod (7), and a sealing ring (9) is installed on the side of the push plate (8). The sealing ring (9) 9) is fitted with the inner wall of the adding cylinder (4), a dispersion filter (10) is fixedly installed at the bottom end of the adding cylinder (4), an adjusting sleeve (11) is installed through the bearing seat on the other side of the top surface of the processing tank (1), a suction pipe (12) is installed through the center of the adjusting sleeve (11), a water spray pipe (15) is installed through the top of one side of the processing tank (1), a sludge pipe (18) is installed at the bottom end of the processing tank (1), the end of the sludge pipe (18) is connected to the top of one end of the drying trough (19), and an observation window (20) is installed on the vertical wall of the processing tank (1).

2. The shale gas production oil-based sludge disposal device according to claim 1, characterized in that: Bottom motors (16) are symmetrically mounted on both sides of the bottom end of the processing tank (1), and bottom dispersing blades (17) are fixedly mounted on the end of the output shaft of the bottom motor (16), wherein the diameter of the bottom dispersing blades (17) is not less than the radius of the middle dispersing blades (3).

3. The shale gas production oil-based sludge disposal device according to claim 1, characterized in that: The length of the hydraulic rod (7) is not less than 3 / 4 of the length of the adding cylinder (4), and the adding cylinder (4) is threadedly connected to a hole opened on one side of the top surface of the processing tank (1).

4. The shale gas production oil-based sludge disposal device according to claim 1, characterized in that: The adjusting sleeve (11) is threadedly connected to the suction pipe (12); a stabilizing block (13) is fixed to one side of one end of the adjusting sleeve (11); the end of the stabilizing block (13) is in contact with the inner wall of a track groove (14); and the track groove (14) is provided on one side of the inner wall of the processing tank (1).

5. The shale gas production oil-based sludge disposal device according to claim 4, characterized in that: The end of the stabilizing block (13) is slidably connected to the track groove (14), and the length of the track groove (14) is not less than half the overall height of the processing tank (1).

6. The shale gas production oil-based sludge disposal device according to claim 1, characterized in that: The water spray pipe (15) is arranged obliquely, the center of the water spray pipe (15) and the center of the adding cylinder (4) are located on the same vertical plane, and the end of the water spray pipe (15) is located below the adding cylinder (4).

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