Shale gas exploitation desanding device

Abstract

The utility model discloses a desanding device for shale gas exploitation, which relates to the field of shale gas exploitation and comprises a storage tank, a gas inlet pipe and a discharge pipe are arranged at the bottom end of the storage tank, a gas delivery pipe is arranged on one side of the top end of the storage tank, and a connecting plate is fixed in the storage tank. A rotating shaft is rotationally connected between the top end of the connecting plate and the top end of the interior of the storage tank, and in the actual operation of the shale gas storage device, a shale gas mixture can be conveyed into the storage tank from the bottom end of the storage tank through a suction device; the sand body and the liquid in the shale gas mixture fall to the bottom end of the interior of the storage tank through self gravity separation, the shale gas is light in mass and can rise so as to be separated, the shale gas can be discharged through the gas conveying pipe, and specifically, the gas conveying pipe can be connected with a sucking pump, and the gas is discharged through the sucking pump.

Description

Technical Field

[0001] The utility model relates to the field of shale gas exploitation, in particular to a shale gas exploitation sand removal device. Background Art

[0002] Shale gas refers to natural gas stored in shale layers. There are a large number of solid particles such as rock cuttings, sand and gravel in shale gas wells. These solid particles are carried out of the wellhead by the high-speed flow of natural gas and enter the natural gas gathering and transportation pipeline, causing high-speed erosion to the gathering and transportation equipment. Therefore, a sand removal device is needed to filter and clean the sand.

[0003] The current sand removal method used by shale gas sand removal devices is to introduce shale gas into a sand removal box with a filter plate, and the filter plate separates the sand in the shale gas from the shale gas; the sand is retained on the filter plate. When there is too much sand on the filter plate, it is necessary to stop the shale gas delivery and then clean the sand on the filter plate, which results in low sand removal efficiency.

[0004] Therefore, it is necessary to propose a shale gas mining and sand removal device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a shale gas mining and sand removal device to solve the problem that the current shale gas sand removal device adopts a sand removal method of introducing shale gas into a sand removal box with a filter plate, and the filter plate separates the sand body in the shale gas from the shale gas; the sand body is retained on the filter plate. When there are too many sand bodies on the filter plate, it is necessary to stop the shale gas delivery and then clean the sand body on the filter plate, which leads to a low sand removal efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shale gas mining and sand removal device, comprising a storage tank, wherein an air inlet pipe and a discharge pipe are arranged at the bottom end of the storage tank, an air supply pipe is arranged on one side of the top of the storage tank, a connecting plate is fixed inside the storage tank, a rotating shaft is rotatably connected between the top of the connecting plate and the top of the inside of the storage tank, a spiral sheet is fixed on the outside of the rotating shaft, a plurality of air holes are opened at the top of the connecting plate, the plurality of air holes simultaneously penetrate the bottom of the connecting plate, and filter screens are arranged inside the plurality of air holes.

[0007] Preferably, the bottom end of the rotating shaft extends out of the connecting plate, and the bottom of the extending end is fixedly connected to the connecting shaft, and a plurality of sweeping plates are fixed to the bottom end of the outer side of the connecting shaft.

[0008] Preferably, the air inlet pipe, the discharge pipe and the air supply pipe are all connected to the interior of the storage tank, and control valves are provided at the connections between the air inlet pipe, the discharge pipe, the air supply pipe and the storage tank.

[0009] Preferably, a plurality of fixing columns are fixed to the outer side of the storage tank, and one end of the plurality of fixing columns away from the storage tank is fixedly connected to a support plate.

[0010] Preferably, the plurality of sweeping plates match the arc surface of the bottom end of the storage tank, and a gap is left between the sweeping plates and the bottom end of the storage tank.

[0011] Preferably, the outer side of the spiral blade is attached to the inner wall of the storage tank, and a water absorbing layer is provided on the surface of the spiral blade.

[0012] Preferably, the connecting plate is fixed to the middle end inside the storage tank.

[0013] Technical effects and advantages of the utility model:

[0014] 1. In the actual operation of the utility model, the shale gas mixture can be transported from the bottom of the storage tank to the inside of the storage tank through the suction device. The sand and liquid in the shale gas mixture are separated by their own gravity and fall to the bottom of the storage tank, while the shale gas is lighter and will rise, thereby being separated. The shale gas can be discharged through the gas pipeline. Specifically, a vacuum pump can be connected to the gas pipeline to discharge the gas using the vacuum pump.

[0015] 2. In the actual operation of the utility model, after the shale gas mixture is transported from the bottom of the storage tank into the storage tank, the impact force generated by the gas can hit the spiral blade, thereby driving the spiral blade to rotate, converting the impact force of the gas into the rotational force of the spiral blade, playing a buffering role. At the same time, the rotation of the spiral blade can drive the sweeping plate to rotate, and the sand and liquid stored at the bottom of the storage tank can be swept to avoid adhesion to the inner wall of the storage tank, which is convenient for discharging waste and can discharge more sand and liquid waste at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the shale gas mining and sand removal device of the utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the storage tank of the utility model.

[0018] In the figure: 1. air inlet pipe; 2. discharge pipe; 3. control valve; 4. storage tank; 5. support plate; 6. fixed column; 7. air hole; 8. rotating shaft; 9. spiral blade; 10. air pipe; 11. connecting shaft; 12. sweeping plate; 13. connecting plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clarify the technical solutions in the embodiments of the utility model; it is completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in 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.

[0020] The utility model provides Figure 1 - Figure 2 A shale gas extraction and sand removal device shown includes a storage tank 4, an air inlet pipe 1 and a discharge pipe 2 are provided at the bottom end of the storage tank 4, and an air supply pipe 10 is provided on one side of the top of the storage tank 4. The air inlet pipe 1, the discharge pipe 2 and the air supply pipe 10 are all connected to the interior of the storage tank 4, and a control valve 3 is provided at the connection between the air inlet pipe 1, the discharge pipe 2, the air supply pipe 10 and the storage tank 4.

[0021] In the actual operation of the present invention, the shale gas mixture can be transported from the bottom end of the storage tank 4 to the interior of the storage tank 4 through a suction device, and the sand and liquid in the shale gas mixture are separated by their own gravity and fall to the bottom end of the interior of the storage tank 4, while the shale gas is lighter in weight and will rise, thereby being separated. The shale gas can be discharged through the gas pipe 10. Specifically, a vacuum pump can be connected to the gas pipe 10 to discharge the gas using the vacuum pump.

[0022] A connecting plate 13 is fixed inside the storage tank 4, a rotating shaft 8 is rotatably connected between the top of the connecting plate 13 and the top of the storage tank 4, a spiral sheet 9 is fixed outside the rotating shaft 8, a plurality of air holes 7 are opened at the top of the connecting plate 13, and the plurality of air holes 7 simultaneously penetrate the bottom of the connecting plate 13, and a filter screen is arranged inside the plurality of air holes 7. The filter screen can intercept impurities and ensure the passage of gas.

[0023] The bottom end of the rotating shaft 8 extends out of the connecting plate 13, and the bottom of the extending end is fixedly connected to the connecting shaft 11, and a plurality of sweeping plates 12 are fixed to the bottom end outside the connecting shaft 11, and the plurality of sweeping plates 12 match the arc surface of the bottom end of the storage tank 4, and a gap is left between the sweeping plates 12 and the bottom end of the storage tank 4.

[0024] In the actual operation of the present invention, after the shale gas mixture is transported from the bottom end of the storage tank 4 into the interior of the storage tank 4, the impact force generated by the gas can hit the spiral blade 9, thereby pushing the spiral blade 9 to rotate, and converting the impact force of the gas into the rotational force of the spiral blade 9, which plays a buffering role. At the same time, the rotation of the spiral blade 9 can drive the sweeping plate 12 to rotate, and the sand and liquid stored at the bottom of the storage tank 4 can be swept to avoid adhesion to the inner wall of the storage tank 4, thereby facilitating the discharge of waste.

[0025] The outer side of the spiral blade 9 is attached to the inner wall of the storage tank 4, and a water absorption layer is provided on the surface of the spiral blade 9. The spiral blade 9 can increase the moving path of the gas discharge, and the water absorption layer can absorb the liquid in the gas to ensure the purity of the discharged gas.

[0026] A plurality of fixing columns 6 are fixed to the outside of the storage tank 4 , and a support plate 5 is fixedly connected to one end of the fixing columns 6 away from the storage tank 4 . The connecting plate 13 is fixed to the middle end of the storage tank 4 , and the support plate 5 can support the storage tank 4 .

Claims

1. A shale gas mining and sand removal device, comprising a storage tank (4), characterized in that: An air inlet pipe (1) and a discharge pipe (2) are arranged at the bottom end of the storage tank (4), an air delivery pipe (10) is arranged on one side of the top end of the storage tank (4), a connecting plate (13) is fixed inside the storage tank (4), a rotating shaft (8) is rotatably connected between the top end of the connecting plate (13) and the top end of the storage tank (4), a spiral sheet (9) is fixed on the outside of the rotating shaft (8), a plurality of air holes (7) are opened at the top end of the connecting plate (13), the plurality of air holes (7) simultaneously penetrate the bottom end of the connecting plate (13), and a filter screen is arranged inside each of the plurality of air holes (7).

2. A shale gas mining and sand removal device according to claim 1, characterized in that: The bottom end of the rotating shaft (8) extends out of the connecting plate (13), and the bottom of the extending end is fixedly connected to the connecting shaft (11), and a plurality of sweeping plates (12) are fixed to the bottom end outside the connecting shaft (11).

3. A shale gas mining and sand removal device according to claim 2, characterized in that: The air inlet pipe (1), the discharge pipe (2) and the air delivery pipe (10) are all connected to the interior of the storage tank (4), and control valves (3) are provided at the connection points between the air inlet pipe (1), the discharge pipe (2), the air delivery pipe (10) and the storage tank (4).

4. A shale gas mining and sand removal device according to claim 1, characterized in that: A plurality of fixing columns (6) are fixed to the outside of the storage tank (4), and one end of the plurality of fixing columns (6) away from the storage tank (4) is fixedly connected to a support plate (5).

5. The shale gas mining and sand removal device according to claim 2, characterized in that: The plurality of sweeping plates (12) match the arc surface of the bottom end of the storage tank (4), and a gap is left between the sweeping plates (12) and the bottom end of the storage tank (4).

6. The shale gas mining and sand removal device according to claim 1, characterized in that: The outer side of the spiral sheet (9) is attached to the inner wall of the storage tank (4), and a water absorption layer is provided on the surface of the spiral sheet (9).

7. The shale gas mining and sand removal device according to claim 1, characterized in that: The connecting plate (13) is fixed to the middle end inside the storage tank (4).

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