LNG (Liquefied Natural Gas) gas-liquid separator

Abstract

The utility model belongs to the technical field of gas-liquid separators, and discloses an LNG gas-liquid separator which comprises a tank body, a gas inlet pipe is fixedly connected to the side face of the tank body, a liquid discharge pipe is fixed to the bottom end of the tank body, a gas outlet connector is connected to the top end of the tank body, and a partition plate of a conical structure is fixedly connected to the middle of the interior of the tank body. The inner part of the tank body is divided into two cavities; air flow can move spirally through the spiral guide blades and the guide plates, centrifugal force is gradually increased in the spiral movement process, the gas-liquid separation efficiency is improved, residual liquid drops are further blocked and separated through the baffle plates, carrying of gas to liquid is effectively reduced, and the gas-liquid separation efficiency is improved. And small liquid drops in mist-containing airflow are promoted to be coalesced into large liquid drops by utilizing ultrasonic waves through the ultrasonic generator, so that mist particles can be conveniently coalesced and dropped under the action of the spiral structure and the baffle plate, and the gas-liquid separation performance is improved.

Description

Technical Field

[0001] This utility model belongs to the field of gas-liquid separator technology, specifically an LNG gas-liquid separator. Background Technology

[0002] The core technology for coal-to-natural-gas conversion is methanation, which first requires gas-liquid separation of the purified gas from the desulfurization process to ensure the subsequent methanation reaction. Currently used gas-liquid separators typically use a baffle plate to separate the gas. Utilizing the inertia of mist particles in the moving airflow, the flow direction of the mist-containing gas is suddenly changed. The mist particles, under the influence of inertia, deviate from the flow direction and collide with the baffle plate, thus being separated. However, with this separation method, the separated liquid is easily carried away by the subsequent gas, resulting in poor gas-liquid separation and affecting the subsequent methanation reaction.

[0003] Therefore, an LNG gas-liquid separator is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides an LNG gas-liquid separator. Through the synergistic effect of a centrifugal structure and corrugated baffles, it effectively reduces gas carryover to liquid, improves natural gas gas-liquid separation efficiency, lowers equipment maintenance costs, and ensures the stable operation of subsequent natural gas processing technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an LNG gas-liquid separator, comprising a tank, an inlet pipe fixedly connected to the side of the tank, a drain pipe fixedly connected to the bottom of the tank, an outlet port connected to the top of the tank, a conical partition fixedly connected to the middle of the tank interior, dividing the tank interior into two chambers, an exhaust pipe fixedly connected to the bottom surface of the partition, and the top of the exhaust pipe extending to the upper side of the partition for connecting the upper and lower chambers of the partition, and a spiral guide vane fixedly connected to the outer wall of the exhaust vane, wherein the axial diameter of the spiral guide vane gradually decreases from top to bottom.

[0006] Preferably, a guide plate is fixedly connected to the bottom surface of the partition, and the inner end of the air inlet pipe penetrates the surface of the tank and extends to the inner side of the guide plate.

[0007] Preferably, the top of the exhaust pipe is fixedly connected to a plurality of baffles arranged in a ring array, and a baffle plate is provided on the upper side of the exhaust pipe, and the baffle plate is fixedly connected to the top of the baffle plate.

[0008] Preferably, the partition has a conical structure.

[0009] Preferably, a guide pipe is fixedly connected to one side of the partition surface.

[0010] Preferably, the baffle plate is wave-shaped.

[0011] Preferably, ultrasonic generators are symmetrically installed inside the tank on one side near the baffle plate.

[0012] Preferably, a wire mesh demister is installed on the top side of the tank near the air outlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model enables the airflow to move in a spiral motion through spiral guide vanes and guide plates. During the spiral motion, the centrifugal force gradually increases, improving the gas-liquid separation efficiency. The baffle plate further blocks and separates the remaining droplets, effectively reducing the amount of liquid carried by the gas. The ultrasonic generator uses ultrasonic waves to promote the coalescence of small droplets in the misty airflow into large droplets, which facilitates the droplets to fall under the action of the spiral structure and baffle plate, thus improving the gas-liquid separation performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the tank body in this utility model;

[0017] Figure 3 This is a schematic diagram of the flow guide tube and baffle in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the baffle and the liquid baffle in this utility model.

[0019] In the diagram: 1. Tank body; 2. Air inlet pipe; 3. Liquid outlet pipe; 4. Air outlet port; 5. Baffle plate; 6. Guide plate; 7. Exhaust pipe; 8. Spiral guide vane; 9. Ultrasonic generator; 10. Wire mesh demister; 11. Guide pipe; 12. Baffle plate; 13. Liquid baffle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 4As shown, this utility model provides an LNG gas-liquid separator, including a tank 1. An inlet pipe 2 is fixedly connected to the side of the tank 1, a drain pipe 3 is fixedly connected to the bottom of the tank 1, and an outlet port 4 is connected to the top of the tank 1. A conical partition 5 is fixedly connected to the middle of the interior of the tank 1, dividing the interior of the tank 1 into two chambers. An exhaust pipe 7 is fixedly connected to the bottom surface of the partition 5, and the top of the exhaust pipe 7 extends to the upper side of the partition 5 to connect the upper and lower chambers of the partition 5. Spiral guide vanes 8 are fixedly connected to the outer wall of the exhaust pipe 7. The shaft diameter of the spiral guide vane 8 gradually decreases from top to bottom. When the device is in use, natural gas containing liquid is introduced into the tank 1 through the air inlet pipe 2. Under the guidance of the spiral guide vane 8, the liquid undergoes a spiral downward centrifugal motion along the outer surface of the exhaust pipe 7. Under the action of centrifugal force, the denser liquid is thrown towards the inner wall of the tank 1, forming a liquid film and flowing downward along the inner wall, effectively separating small-diameter liquid droplets, reducing the gas carrying liquid, and improving the gas-liquid separation efficiency of natural gas. Then, the separated gas flow is transported through the exhaust pipe 7 and discharged through the gas outlet port 4.

[0022] like Figures 1 to 4 As shown, a guide plate 6 is fixedly connected to the bottom surface of the partition 5, and the inner end of the air inlet pipe 2 penetrates the surface of the tank 1 and extends to the inner side of the guide plate 6. The guide plate 6 cooperates with the spiral guide vane 8 to form a spiral cavity, so that the natural gas can better form a spiral airflow when it passes through.

[0023] The top of the exhaust pipe 7 is fixedly connected to several sets of baffles 12 arranged in a ring. A baffle plate 13 is provided on the upper side of the exhaust pipe 7 and is fixedly connected to the top of the baffle plate 12. The baffle plate 5 has a conical structure and a guide pipe 11 is fixedly connected to one side of the surface of the baffle plate 5. The baffle plate 12 has a wave shape. After the airflow passes through the exhaust pipe 7, it enters one side of the baffle plate 12. The mist particles in the airflow will collide with the arc surface of the baffle plate 12 and be separated. The curved structure of the baffle plate 12 can more effectively change the airflow direction, increase the contact area between the mist particles and the baffle plate 12, enhance the separation effect of the mist particles, and reduce the gas flow resistance. The separated mist droplets will fall on the surface of the baffle plate 5 under the action of gravity and be transported through the guide pipe 11, so as to facilitate the discharge of liquid through the drain pipe 3.

[0024] An ultrasonic generator 9 is symmetrically installed inside the tank 1 on one side near the baffle plate 12. During the gas-liquid separation process, the ultrasonic generator 9 applies ultrasonic waves to the mist-containing airflow, causing the mist particles to coalesce and easily form larger droplets. This makes it easier for the droplets to be thrown towards the inner wall of the tank 1 under centrifugal force when passing through the spiral guide vane 8, further improving the gas-liquid separation efficiency.

[0025] A wire mesh demister 10 is installed on the top side of the tank 1 near the gas outlet 4. After the natural gas is processed by the spiral guide vanes 8 and the baffle 12, it is discharged through the gas outlet 4. During this process, the capillary action and interception effect of the wire mesh on the wire mesh demister 10 are used to capture the fine mist particles that the baffle 12 fails to completely separate, thereby further reducing the liquid content in the gas.

[0026] Working principle and process: In operation, natural gas containing liquid is introduced into tank 1 through inlet pipe 2. The natural gas is guided by spiral guide vanes 8 and guide plates 6 to form a spiral airflow. The high-speed rotating natural gas generates centrifugal force, and the mist particles are thrown against the inner wall of tank 1 under this force, flowing down the wall to achieve separation. This reduces the amount of liquid carried by the gas and improves the gas-liquid separation efficiency. The separated airflow is then conveyed to one side of baffle plate 12 through exhaust pipe 7. The mist particles in the airflow collide with the curved surface of baffle plate 12 and are separated. The structure can more effectively change the airflow direction, increase the contact area between the mist particles and the baffle plate 12, and enhance the separation effect of the mist particles. At the same time, the ultrasonic generator 9 is activated, and the ultrasonic waves act on the mist-containing airflow, causing the mist particles to coalesce and not be easily carried away by the airflow. The separated mist droplets will fall on the surface of the baffle plate 5 under the action of gravity and be transported to the bottom of the tank 1 through the guide pipe 11, so that the liquid inside the tank 1 can be discharged through the drain pipe 3. Through the capillary action and interception effect of the wire mesh demister 10, the fine mist particles that the baffle plate 12 failed to completely separate are captured, further reducing the liquid content in the gas.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An LNG gas-liquid separator, comprising a tank, characterized in that: An air inlet pipe is fixedly connected to the side of the tank, a drain pipe is fixedly connected to the bottom of the tank, and an air outlet is connected to the top of the tank. A conical partition is fixedly connected to the middle of the inside of the tank, dividing the inside of the tank into two chambers. An exhaust pipe is fixedly connected to the bottom surface of the partition, and the top of the exhaust pipe extends to the upper side of the partition to connect the upper and lower chambers of the partition. A spiral guide vane is fixedly connected to the outer wall of the exhaust pipe, and the axial diameter of the spiral guide vane gradually decreases from top to bottom.

2. An LNG gas-liquid separator according to claim 1, characterized in that: A guide plate is fixedly connected to the bottom surface of the partition, and the inner end of the air inlet pipe penetrates the surface of the tank and extends to the inner side of the guide plate.

3. An LNG gas-liquid separator according to claim 1, characterized in that: The top of the exhaust pipe is fixedly connected to several sets of baffles arranged in a ring array, and a liquid baffle is provided on the upper side of the exhaust pipe, and the liquid baffle is fixedly connected to the top of the baffle.

4. An LNG gas-liquid separator according to claim 3, characterized in that: The partition has a conical structure.

5. An LNG gas-liquid separator according to claim 4, characterized in that: A flow guide pipe is fixedly connected to one side of the partition surface.

6. An LNG gas-liquid separator according to claim 5, characterized in that: The baffle plate is wave-shaped.

7. An LNG gas-liquid separator according to claim 3, characterized in that: An ultrasonic generator is symmetrically installed inside the tank on one side near the baffle plate.

8. An LNG gas-liquid separator according to claim 1, characterized in that: A wire mesh demister is installed on the top side of the tank near the air outlet.

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