Multi-bundle multiphase flow metering separator

Abstract

The utility model relates to natural gas separation technical field, concretely relates to multi -tube bundle multiphase flow metering separator, include: pre -separation cylinder, the outer wall symmetry fixedly connected with connecting pipe of pre -separation cylinder, the outer wall fixedly connected with connecting pipe of pre -separation cylinder as gas import. Form the cyclone through pre -separation cylinder tangential gas, separate gas and liquid in medium in advance, subsequent multi -tube bundle element secondary separation to residual gas -liquid mixture with centrifugal force, double separation mechanism effectively promotes overall separation efficiency and precision, through the combination design of "pre -separation cylinder + multi -tube bundle element + compact liquid accumulation cylinder", make compact structure and adaptation measurement demand, to reduce the equipment volume and floor area, the gas after separation is exhausted through gas export, liquid is exhausted through liquid export, can directly link the flowmeter on pipeline, realize "separation - measurement" integration, solve the problem that traditional equipment structure redundancy, measurement adaptability is poor.

Description

Technical Field

[0001] This utility model relates to the field of natural gas separation technology, specifically to a multi-tube bundle multiphase flow metering separator. Background Technology

[0002] In existing technologies, during the natural gas extraction process, the produced gas is often mixed with liquids such as free water and oil. Before transportation and storage, gas-liquid separation and separate metering are required. Traditionally, gravity separators are used to achieve this separation. This equipment relies on gravity to separate droplets. To ensure the separation effect, a large internal space needs to be reserved, resulting in a large overall volume and a large footprint. This makes it difficult to adapt to space-constrained extraction or transportation scenarios. Furthermore, the structure has not been optimized for subsequent metering needs, which significantly limits its practicality.

[0003] Therefore, this utility model of a multi-tube bundle multiphase flow metering separator has emerged. It initially separates the gas and liquid in the medium through tangential air inlet of the pre-separation cylinder, and completes secondary separation by combining the upper narrow and lower wide liquid accumulation cylinder with multi-tube bundle separation elements. The overall structure is compact, reducing volume and footprint. At the same time, the separated gas and liquid can be directly connected to the flow meter through the corresponding outlet, taking into account both high-efficiency separation and metering functions. It effectively makes up for the shortcomings of traditional gravity separators and meets the urgent needs of the natural gas separation industry for high-efficiency and high-precision functions of natural gas separators. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is a multi-tube bundle multiphase flow metering separator, comprising: a pre-separation cylinder, wherein connecting pipes are symmetrically fixedly connected to the outer wall of the pre-separation cylinder, and the connecting pipes serve as gas inlets. In use, the top-narrow, bottom-wide structure of the liquid collection cylinder fixed to the frame is one of the key design features for achieving efficient gas-liquid separation and smooth discharge. This structure not only meets the process requirements of pre-separation and secondary separation but also accommodates the dual functions of liquid collection and gas discharge, forming a synergy with core components such as the pre-separation cylinder and multi-tube bundle separation elements, providing support for the core objective of "separation + metering". The liquefied natural gas to be processed enters the pre-separation cylinder through the gas inlet, forming a swirling flow and initially separating the gas and liquid in the medium. The separated liquid flows into the liquid collection cylinder through the connecting pipe, while the unseparated gas-liquid mixture enters the multi-tube bundle separation elements. The shape design of the liquid collection cylinder plays a crucial auxiliary role in this process.

[0005] Preferably, a liquid collection cylinder is fixedly connected to the outer wall of the connecting pipe, and a frame is fixedly connected to the outer wall of the liquid collection cylinder. A connecting pipe is fixedly connected to the top outer wall of the liquid collection cylinder as a gas outlet, and a connecting pipe is fixedly connected to the bottom outer wall of the liquid collection cylinder as a liquid outlet. The inner wall of the liquid collection cylinder is provided with a multi-tube bundle separation element. The narrow space at the top of the liquid collection cylinder essentially constitutes a gradually narrowing airflow channel. This channel is adapted to the array distribution of the exhaust pipes and can guide the dispersed airflow discharged from each exhaust pipe to converge upwards along the cylinder wall. In the traditional structure, the dispersed airflow is prone to form disordered vortices in the cylinder, and the vortices will consume the kinetic energy of the gas, further leading to a pressure drop. This gradually narrowing channel avoids this problem, allowing the airflow to converge to the gas outlet at the top of the liquid collection cylinder in a more orderly state, reducing kinetic energy loss and ensuring that the gas can reach the outlet position with a stable pressure.

[0006] Preferably, the multi-tube bundle separation element includes an interceptor plate, which is linearly arrayed along the inner wall of the liquid collection cylinder. An exhaust pipe is fixedly connected to the inner wall of the interceptor plate, and a guide pipe is sleeved on the outside of the exhaust pipe. The wider space at the bottom of the liquid collection cylinder and the narrower space at the top form a clear gas-liquid functional partition, which is specifically used to accommodate the liquid generated during the pre-separation and secondary separation processes. The droplets initially separated by the pre-separation cylinder and the small-diameter droplets separated by the multi-tube bundle separation element are guided along the wall or through the guide pipe into the wider space at the bottom and discharged from the liquid collection cylinder through the liquid outlet. This design not only avoids liquid stagnation but also significantly reduces the interference of liquid splashing on the upper airflow, effectively preventing secondary mixing of gas and liquid, ensuring the purity and flow stability of the medium in the upper gas channel, and providing a guarantee for the continuity of airflow pressure.

[0007] Preferably, the liquid collection cylinder has a shape that is narrower at the top and wider at the bottom. The narrower space at the top of the liquid collection cylinder plays an important role in constraining the gas flow after secondary separation by the multi-tube bundle separation element. When pure natural gas enters the liquid collection cylinder through the array of connecting pipes distributed on the interceptor plate, the narrow space at the top can effectively prevent excessive diffusion during the upward flow of gas. If a structure with equal diameter or wider at the top and narrower at the bottom is used, the gas is prone to diffusion, resulting in dispersed flow velocity and rapid pressure decay. This design, by moderately constraining the airflow, reduces the pressure loss caused by spatial diffusion, indirectly maintaining a relatively stable pressure for the gas, and laying the foundation for overcoming the resistance of the gas outlet pipeline and achieving smooth discharge.

[0008] Preferably, the outer wall of the interceptor plate is fixedly connected to the inner wall of the liquid collection cylinder, and the outer wall of the guide pipe is fixedly connected to the inner wall of the interceptor plate. The narrow space at the top of the liquid collection cylinder essentially forms a gradually narrowing airflow channel. This channel is adapted to the array distribution of the exhaust pipes and can guide the dispersed airflow discharged from each exhaust pipe to converge upwards along the cylinder wall. In the traditional structure, the dispersed airflow is prone to form disordered vortices in the cylinder, and the vortices will consume the kinetic energy of the gas, further leading to a pressure drop. This gradually narrowing channel avoids this problem, allowing the airflow to converge to the gas outlet at the top of the liquid collection cylinder in a more orderly state, reducing kinetic energy loss and ensuring that the gas can reach the outlet position with a stable pressure.

[0009] The beneficial effects of this utility model are as follows: 1. This utility model improves separation efficiency and accuracy by setting a pre-separation cylinder. The pre-separation cylinder forms a swirling flow by tangential air intake, which separates the gas and liquid in the medium in advance, reducing the processing load of the multi-tube bundle separation element. Subsequently, the multi-tube bundle element uses centrifugal force to perform secondary separation of the remaining gas-liquid mixture. Combined with the gas-liquid partition design of the narrow upper and wide lower liquid accumulation cylinder, secondary mixing is avoided. The dual separation mechanism effectively improves the overall separation efficiency and accuracy.

[0010] 2. This utility model adopts a combination design of "pre-separation cylinder + multi-tube bundle element + compact liquid collection cylinder", which makes the structure compact and adaptable to metering requirements. Compared with the problem of traditional gravity separators being large in size and occupying a large area, it reduces the size of the equipment and the floor space. At the same time, the separated gas is discharged through the gas outlet and the liquid is discharged through the liquid outlet, which can be directly connected to the flow meter on the pipeline to realize the integration of "separation-metering" and solve the problems of redundant structure and poor metering adaptability of traditional equipment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the back structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of this utility model; Figure 4 This is a schematic diagram of the structure of the multi-tube bundle separation element of this utility model.

[0012] In the diagram: 1. Pre-separation cylinder; 2. Gas inlet; 3. Liquid collection cylinder; 4. Gas outlet; 5. Liquid outlet; 6. Multi-tube bundle separation element; 7. Connecting pipe; 8. Frame; 60. Interceptor plate; 61. Exhaust pipe; 62. Guide pipe. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0014] Example: Please see Figure 1 - Figure 4 This utility model provides a technical solution: a multi-tube bundle multiphase flow metering separator, including: a pre-separation cylinder 1, with connecting pipes 7 symmetrically fixedly connected to the outer wall of the pre-separation cylinder 1, and the connecting pipes 7 serving as gas inlets 2.

[0015] A liquid collection cylinder 3 is fixedly connected to the outer wall of the connecting pipe 7. A frame 8 is fixedly connected to the outer wall of the liquid collection cylinder 3. A connecting pipe 7 is fixedly connected to the top outer wall of the liquid collection cylinder 3 as a gas outlet 4. A connecting pipe 7 is fixedly connected to the bottom outer wall of the liquid collection cylinder 3 as a liquid outlet 5. A multi-tube bundle separation element 6 is provided on the inner wall of the liquid collection cylinder 3.

[0016] The multi-tube bundle separation element 6 includes an interceptor plate 60, which is arranged in a linear array along the inner wall of the liquid collection cylinder 3. An exhaust pipe 61 is fixedly connected to the inner wall of the interceptor plate 60, and a guide pipe 62 is sleeved on the outside of the exhaust pipe 61.

[0017] The liquid collection cylinder 3 is narrow at the top and wide at the bottom. The outer wall of the interceptor plate 60 is fixedly connected to the inner wall of the liquid collection cylinder 3, and the outer wall of the guide pipe 62 is fixedly connected to the inner wall of the interceptor plate 60.

[0018] Working principle: In operation, the top-narrow, bottom-wide structure of the liquid collection cylinder 3, fixed to the frame 8, is a key design feature for achieving efficient gas-liquid separation and smooth discharge. This structure not only meets the process requirements of pre-separation and secondary separation but also serves the dual functions of liquid collection and gas discharge. It works in synergy with core components such as the pre-separation cylinder 1 and the multi-tube bundle separation element 6 to support the core objective of "separation + metering". The liquefied natural gas to be processed enters the pre-separation cylinder 1 through the gas inlet 2, forming a swirling flow and initially separating the gas and liquid in the medium. The separated liquid flows into the liquid collection cylinder 3 through the connecting pipe 7, while the unseparated gas-liquid mixture enters the multi-tube bundle separation element 6. The shape design of the liquid collection cylinder 3 plays a crucial auxiliary role in this process.

[0019] Meanwhile, the narrow space at the top of the liquid collection cylinder 3 essentially forms a tapered airflow channel. This channel is adapted to the array distribution of the exhaust pipes 61, guiding the dispersed airflow discharged from each exhaust pipe 61 to converge upwards along the cylinder wall. In conventional structures, dispersed airflow tends to form disordered vortices inside the cylinder, which consume gas kinetic energy and further lead to a pressure drop. This tapered channel avoids this problem, allowing the airflow to converge in a more orderly manner to the gas outlet 4 at the top of the liquid collection cylinder 3, reducing kinetic energy loss and ensuring that the gas can reach the outlet position with a stable pressure.

[0020] The wider space at the bottom of the liquid collection cylinder 3, together with the narrower space at the top, forms a clear gas-liquid functional zone, specifically designed to accommodate the liquids generated during the pre-separation and secondary separation processes. The droplets initially separated by the pre-separation cylinder 1 and the small-diameter droplets separated by the multi-tube bundle separation element 6 are guided along the wall or through the guide tube 62 into the wider space at the bottom, and then discharged from the liquid collection cylinder 3 through the liquid outlet 5. This design not only avoids liquid stagnation but also significantly reduces the interference of liquid splashing on the upper airflow, effectively preventing secondary mixing of gas and liquid, ensuring the purity and flow stability of the medium in the upper gas channel, and providing a guarantee for the continuity of airflow pressure.

[0021] The narrow space at the top of the liquid collection cylinder 3 plays an important role in constraining the gas flow after secondary separation by the multi-tube bundle separation element 6. When pure natural gas enters the liquid collection cylinder 3 through the array of connecting pipes 7 on the interceptor plate 60, the narrow space at the top can effectively prevent excessive diffusion during the upward flow of gas. If a structure with equal diameter or wider at the top and narrower at the bottom is adopted, the gas is prone to diffusion, resulting in dispersion of flow velocity and rapid pressure decay. This design, by moderately constraining the airflow, reduces the pressure loss caused by spatial diffusion, indirectly maintaining a relatively stable pressure for the gas, laying the foundation for overcoming the pipeline resistance of the gas outlet 4 and achieving smooth discharge.

[0022] Meanwhile, the narrow space at the top of the liquid collection cylinder 3 essentially forms a gradually narrowing airflow channel. This channel is adapted to the array distribution of the exhaust pipes 61 and can guide the dispersed airflow discharged from each exhaust pipe 61 to converge upwards along the cylinder wall. In the traditional structure, the dispersed airflow is prone to form disordered vortices in the cylinder, and the vortices will consume the kinetic energy of the gas, which will further lead to a pressure drop. This gradually narrowing channel avoids this problem, allowing the airflow to converge to the gas outlet 4 at the top of the liquid collection cylinder 3 in a more orderly state, reducing kinetic energy loss and ensuring that the gas can reach the outlet position with a stable pressure.

[0023] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A multi-tube bundle multiphase flow metering separator, characterized in that, include: A pre-separation cylinder (1) is symmetrically and fixedly connected to a connecting pipe (7) on its outer wall, and the connecting pipe (7) is fixedly connected to the outer wall of the pre-separation cylinder (1) as a gas inlet (2).

2. The multi-tube bundle multiphase flow metering separator according to claim 1, characterized in that: The outer wall of the connecting pipe (7) is fixedly connected to a liquid collection cylinder (3), the outer wall of the liquid collection cylinder (3) is fixedly connected to a frame (8), the top outer wall of the liquid collection cylinder (3) is fixedly connected to a connecting pipe (7) as a gas outlet (4), the bottom outer wall of the liquid collection cylinder (3) is fixedly connected to a connecting pipe (7) as a liquid outlet (5), and the inner wall of the liquid collection cylinder (3) is provided with a multi-tube bundle separation element (6).

3. The multi-tube bundle multiphase flow metering separator according to claim 2, characterized in that: The multi-tube separation element (6) includes an interceptor plate (60), which is arranged in a linear array along the inner wall of the liquid collection cylinder (3). An exhaust pipe (61) is fixedly connected to the inner wall of the interceptor plate (60), and a guide pipe (62) is sleeved on the outside of the exhaust pipe (61).

4. The multi-tube bundle multiphase flow metering separator according to claim 2, characterized in that: The liquid collection cylinder (3) is narrow at the top and wide at the bottom.

5. The multi-tube bundle multiphase flow metering separator according to claim 3, characterized in that: The outer wall of the interceptor plate (60) is fixedly connected to the inner wall of the liquid collection cylinder (3), and the outer wall of the guide pipe (62) is fixedly connected to the inner wall of the interceptor plate (60).

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