Spiral separator for efficient separation of shale gas

Abstract

The utility model discloses a spiral separator for efficiently separating shale gas, and relates to the technical field of separation equipment. In order to solve the problems that a traditional separator is often large in size, large in occupied area, high in installation and maintenance cost and limited in capacity of capturing tiny liquid drops and solid-phase particles, and the separation efficiency is greatly influenced by factors such as gas-liquid density difference and flow velocity. According to the technical scheme, the device comprises a cylinder body, an air inlet formed in the upper side part of the cylinder body and an air outlet formed in the top of the cylinder body; a gas rising pipe is coaxially arranged on the side, close to the gas outlet, in the cylinder body, and a liquid blocking pipe is coaxially arranged outside the gas rising pipe; a circular baffle is arranged in the middle of the barrel, and a rotation stopping plate connected to the inner wall of the barrel is arranged below the circular baffle. The device has the beneficial effects of high-efficiency separation, compactness, miniaturization, reduction of liquid film loss, reduction of liquid foam entrainment and the like, and is favorable for improving the economic benefit and the environmental protection performance of the whole gas field development.

Description

Technical Field

[0001] The utility model relates to the technical field of separation equipment, in particular to a spiral separator for efficient separation of shale gas. Background Art

[0002] In recent years, with the growth of energy demand and the advancement of mining technology, the development of unconventional natural gas resources such as shale gas and tight gas has received increasing attention. The output of such gas reservoirs usually contains a high proportion of liquid hydrocarbons, water and solid particles (such as sand and gravel). If they are directly transported to gas gathering stations without effective treatment, it will not only aggravate pipeline erosion and corrosion, reduce transportation efficiency, but also may cause serious damage to subsequent processing facilities and even cause production safety accidents. Therefore, efficient and reliable liquid-gas separation of shale gas / tight gas is crucial.

[0003] Although existing gravity separators can achieve preliminary gas-liquid separation, their ability to capture fine droplets and solid particles is limited, and the separation efficiency is greatly affected by factors such as gas-liquid density difference and flow rate. In addition, traditional separators are often large in size and occupy a large area. For well sites or offshore platforms with limited space, their installation and maintenance costs are high. In response to the above problems, the industry has been exploring new separation technologies with more optimized structures, higher separation efficiency, and smaller footprint. Utility Model Content

[0004] The utility model proposes a spiral separator for efficient separation of shale gas, so as to solve the problems that the existing separator has limited capture capacity for fine droplets and solid particles, and the separation efficiency is greatly affected by factors such as gas-liquid density difference and flow rate.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A spiral separator for efficient separation of shale gas comprises: a cylinder, an air inlet arranged on the upper side of the cylinder, and an air outlet arranged on the top of the cylinder; a riser is coaxially arranged on one side of the cylinder close to the air outlet, and a liquid retaining pipe is coaxially arranged on the outside of the riser; a circular baffle is arranged in the middle of the cylinder, and a rotation-stopping plate connected to the inner wall of the cylinder is arranged below the circular baffle.

[0007] The design of the liquid retaining tube and liquid retaining skirt helps to suppress the creep of the liquid on the cylinder wall, reduce the formation and loss of liquid film, ensure that more liquid and solid particles can gather downward along the cylinder wall, avoid the loss of valuable fluid resources, and also reduce the possibility of entrained droplets in the airflow. The anti-rotation plate prevents the liquid phase from continuing to rotate toward the lower end after separation, avoiding the waste of liquid phase kinetic energy and the possible turbulent flow inside the equipment, ensuring that the liquid and sand can be discharged smoothly from the sewage outlet, maintaining a good separation order and equipment working efficiency. The circular baffle is located above the turning point of the rising airflow, which can further intercept the liquid foam that may be entrained in the process of rising airflow, enhance the separator's ability to capture tiny droplets, and ensure the cleanliness of the output gas.

[0008] Furthermore, the outer wall of the cylinder is provided with liquid level gauge openings below the circular baffle and the anti-rotation plate.

[0009] Furthermore, the liquid level gauge port is provided with a liquid level gauge.

[0010] Furthermore, a liquid blocking skirt is provided at the bottom of the liquid blocking tube.

[0011] Furthermore, a sewage outlet is provided at the bottom of the cylinder.

[0012] Furthermore, an upper head is arranged at the top of the cylinder, and a lower head is arranged at the bottom of the cylinder.

[0013] Furthermore, a plurality of legs are provided at the bottom of the cylinder.

[0014] The utility model has the following beneficial effects:

[0015] The utility model utilizes the centrifugal force generated by the spiral structure to enhance the separation effect of gas and liquid. Compared with the separation relying solely on gravity, it can more effectively separate gas and liquid, improve separation efficiency, and ensure gas purity and safe operation of subsequent processing equipment. Under the premise of maintaining the same processing capacity, the device structure is more compact and the overall size is reduced by adding a spiral separation mechanism. It is conducive to saving space, reducing material costs, and adapting to limited or complex site layout requirements, and is particularly suitable for well sites or gas gathering stations with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 1 to Figure 2The reference numerals shown in the figure represent respectively: 1-cylinder, 11-upper head, 12-lower head, 13-leg, 2-air inlet, 3-air outlet, 4-riser pipe, 5-liquid retaining pipe, 51-liquid retaining skirt, 6-circular baffle, 7-rotation stop plate, 8-liquid level gauge port, 9-drainage port. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solution of the utility model in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the utility model.

[0020] Please refer to Figure 1-2 A spiral separator for efficient separation of shale gas comprises: a cylinder 1, an air inlet 2 opened on the upper side of the cylinder 1 and an air outlet 3 opened on the top of the cylinder 1; a liquid blocking pipe 5 is coaxially arranged on the outside of the riser 4; a circular baffle 6 is arranged in the middle of the cylinder 1, and a rotation-stopping plate 7 connected to the inner wall of the cylinder 1 is arranged below the circular baffle 6.

[0021] The air inlet 2 is located at the upper part of the cylinder 1 and is designed in the form of a tangential inlet, so that shale gas / tight gas enters the cylinder 1 in a spiral shape at high speed, and uses centrifugal force to quickly separate gas and liquid. The inner wall of the cylinder 1 is provided with a spiral guide structure to guide the mixed gas flow to move downward along a spiral trajectory, increase the gas-liquid contact area, and promote droplet aggregation and sand particle sedimentation. A plurality of liquid retaining skirts 51 are provided at the bottom of the liquid retaining tube 5. The liquid retaining tube 5 and the liquid retaining skirt 51 are arranged below the inner wall of the cylinder, and by changing the flow state of the liquid film, the creeping phenomenon of the liquid film caused by airflow disturbance is suppressed, the liquid film loss is reduced, and the liquid phase recovery rate is improved.

[0022] A riser pipe 4 is coaxially provided on one side of the cylinder 1 near the gas outlet 3. The riser pipe 4 and the bottom of the cylinder 1 form a return space, where the airflow reverses upward after spirally moving downward, preventing liquid and sand particles from being brought in, and ensuring pure gas output. The circular baffle 6 is placed below the riser pipe 4 to rectify the rising airflow, reduce the liquid foam carried during the rotation of the airflow, and further improve the separation purity of the gas phase. The anti-rotation plate 7 is installed at the lower part of the cylinder near the sewage outlet 9 to prevent the separated liquid phase from continuing to rotate along the spiral trajectory, ensuring that the liquid-sand mixture is discharged smoothly from the sewage outlet 9.

[0023] The outer wall of the cylinder 1 is provided with a liquid level gauge port 8 below the circular baffle 6 and the anti-rotation plate 7. The liquid level gauge port 8 is equipped with a liquid level gauge to monitor the liquid level in the cylinder 1 in real time, so as to accurately control the working liquid level and ensure the stable separation process. The gas outlet 3 is located at the top of the separator, and the clean gas is discharged from here after rising through the gas riser 4 and transported to the gas collection station for subsequent treatment. The sewage outlet 9 is set at the bottom of the cylinder to discharge the separated liquid sand mixture, which can be connected to the subsequent sewage treatment system or solid-liquid separation equipment.

[0024] An upper head 11 is provided at the top of the cylinder 1, and a lower head 12 is provided at the bottom of the cylinder 1. Three legs 13 are provided at the bottom of the cylinder 1. The upper head 11, the lower head 12 and the legs 13 constitute the sealing structure and support system of the separator to ensure the overall sealing and stability of the equipment.

[0025] When in use, the shale gas / tight gas mixture enters the cylinder 1 tangentially from the air inlet 2. With the help of the centrifugal force generated by the spiral structure, the droplets are quickly separated and deposited downward along the cylinder wall, while the gas phase continues to spiral downward to the riser 4 and then returns to rise. The liquid sand mixture flows to the anti-rotation plate and stops rotating, then slides down along the cylinder wall and is discharged through the drain port 9. The liquid level gauge at the liquid level gauge port 8 monitors the liquid level in the cylinder 1 in real time, so that the operator can adjust the air intake flow or open the drain valve to maintain the optimal working liquid level. Finally, the purified gas is output to the subsequent processing link through the air outlet.

[0026] In summary, the spiral reinforced separator provided in this embodiment solves the problem of efficient separation and miniaturized equipment requirements faced in shale gas / tight gas exploitation through clever structural design and process optimization. All internal components are welded, which enhances the overall rigidity and sealing performance of the equipment and reduces the risk of failure caused by loose or leaking connectors. Welded structures usually have higher pressure and temperature resistance and stronger impact and vibration resistance, thereby improving the long-term stable operation capability of the equipment under harsh working conditions. This embodiment has the advantages of compact structure, significant separation effect, stable operation, and convenient maintenance, and is of great value for improving the economic and environmental benefits of the development of unconventional natural gas resources.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 spiral separator for efficient separation of shale gas, characterized in that: include: A cylinder (1), an air inlet (2) provided on the upper side of the cylinder (1), and an air outlet (3) provided on the top of the cylinder (1); a riser (4) is coaxially provided on one side of the cylinder (1) close to the air outlet (3), and a liquid blocking pipe (5) is coaxially provided on the outside of the riser (4); a circular baffle (6) is provided in the middle of the cylinder (1), and a rotation-stopping plate (7) connected to the inner wall of the cylinder (1) is provided below the circular baffle (6).

2. The spiral separator for efficient separation of shale gas according to claim 1, characterized in that: The outer wall of the cylinder (1) is provided with liquid level gauge openings (8) below the circular baffle (6) and the anti-rotation plate (7).

3. The spiral separator for efficient separation of shale gas according to claim 2, characterized in that: The liquid level gauge port (8) is provided with a liquid level gauge.

4. The spiral separator for efficient separation of shale gas according to claim 1, characterized in that: The bottom of the liquid blocking tube (5) is provided with a liquid blocking skirt (51).

5. The spiral separator for efficient separation of shale gas according to claim 1, characterized in that: A sewage outlet (9) is provided at the bottom of the cylinder (1).

6. The spiral separator for efficient separation of shale gas according to claim 1, characterized in that: An upper sealing head (11) is arranged at the top of the cylinder (1), and a lower sealing head (12) is arranged at the bottom of the cylinder (1).

7. The spiral separator for efficient separation of shale gas according to any one of claims 1 to 6, characterized in that: The bottom of the cylinder (1) is provided with a plurality of supporting legs (13).

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