LNG (Liquefied Natural Gas) decarbonization, regeneration, condensation and separation integrated device

Abstract

The utility model discloses an LNG (Liquefied Natural Gas) decarburization, regeneration, condensation and separation integrated device which comprises an upper decarburization tower body and a lower decarburization tower body, under the interaction of the upper decarburization tower body, the lower decarburization tower body, the gas injection mechanism, the circulating decarburization mechanism and the reinforcing mechanism, the upper decarburization tower body and the lower decarburization tower body are detachably connected, maintenance and overhaul are facilitated, an annular ventilation cavity in the gas injection mechanism is matched with a nozzle, natural gas is evenly distributed in the tower body, the gas-liquid contact area is remarkably enlarged, and the gas-liquid separation effect is improved. The circulating decarburization mechanism utilizes a circulating pump body to drive a decarburization solvent to circulate, and uniform spraying is performed through a zigzag pipeline and a spray head, so that gas-liquid reverse sufficient contact is realized, the continuous and stable decarburization process is guaranteed, a decarburization net is enhanced, the gas-liquid mass transfer effect is further optimized, the decarburization efficiency is effectively improved through the overall integrated design, and the technological process is simplified; the energy consumption and the maintenance cost are reduced, and the high efficiency and the stability of LNG production are guaranteed.

Description

An integrated LNG decarbonization, regeneration, condensation, and separation device Technical Field

[0001] This utility model relates to the field of natural gas liquefaction technology, and in particular to an integrated device for LNG decarbonization, regeneration, condensation and separation. Background Technology

[0002] In the LNG (liquefied natural gas) processing sector, decarbonization is a crucial step in removing acidic impurities such as carbon dioxide from natural gas, directly impacting LNG product quality and subsequent storage and transportation safety. The solvents used in the decarbonization process need to be regenerated to restore their absorption capacity, while the condensate generated during regeneration must be effectively separated to achieve solvent recycling and impurity removal.

[0003] In LNG decarbonization, the decarbonization tower is the core component of the gas-liquid reaction, and its structural design directly affects the contact efficiency between natural gas and decarbonization solvent. Traditional decarbonization towers generally adopt a single-cavity structure, with the gas inlet usually located at a single position at the bottom or side of the tower. This leads to the formation of local eddies or laminar flow phenomena due to abrupt changes in the flow channel after natural gas enters the tower. This uneven gas distribution prevents the decarbonization solvent from fully mixing with the natural gas. At the same time, the natural gas in the high-speed flow zone has a short residence time, and carbon dioxide is discharged from the tower before being fully absorbed. Meanwhile, the solvent in the low-speed zone is in contact with low-concentration gas for a long time, resulting in the solvent's absorption capacity not being fully utilized, forming "ineffective contact," which seriously affects the stability and economy of the decarbonization process. Therefore, we propose an integrated LNG decarbonization, regeneration, condensation, and separation device to solve the above problems. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings in the above-mentioned background technology and to propose an integrated LNG decarbonization, regeneration, condensation and separation device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated LNG decarbonization, regeneration, condensation, and separation device includes an upper decarbonization tower and a lower decarbonization tower. The upper and lower decarbonization towers are detachably connected by multiple sets of bolts. An air jet mechanism is provided on the outer wall of both the upper and lower decarbonization towers.

[0007] The jetting mechanism includes multiple annular ventilation chambers opened inside the upper decarbonization tower body and the lower decarbonization tower body. Natural gas inlet pipes are fixedly installed on the outer walls of both the upper and lower decarbonization tower bodies. The natural gas inlet pipes and the annular ventilation chambers are fixedly connected by connecting joints. Multiple nozzles communicating with the annular ventilation chambers are fixedly installed on the inner walls of both the upper and lower decarbonization tower bodies.

[0008] The top of the upper decarbonization tower and the bottom of the lower decarbonization tower are connected by a circulating decarbonization mechanism;

[0009] The circulating decarbonization mechanism includes a folded inlet pipe fixedly installed at the top of the upper decarbonization tower body, a folded outlet pipe fixedly installed at the bottom of the lower decarbonization tower body, the folded inlet pipe and the folded outlet pipe being fixedly connected by a connecting pipe, and a circulating pump body connected to the folded outlet pipe being fixedly installed at the bottom of the lower decarbonization tower body.

[0010] Preferably, a regeneration unit and a condensation separation component are fixedly installed on the folded liquid outlet pipe, and a drain pipe is fixedly installed at the bottom of the condensation separation component.

[0011] Preferably, a connecting plate is fixedly installed at the end of the folded liquid inlet pipe extending into the upper decarbonization tower body, and multiple nozzles are fixedly installed at the bottom of the connecting plate.

[0012] Preferably, the plurality of nozzles are arranged in a ring array on the inner sidewall of the upper decarbonization tower or the inner sidewall of the lower decarbonization tower.

[0013] Preferably, a three-way valve is fixedly installed on the outer wall of the folded inlet pipe, and a replenishment pipe is fixedly installed on the top valve port of the three-way valve.

[0014] Preferably, a reinforcing mechanism is provided on the inner sidewall of both the upper and lower decarbonization tower bodies. The reinforcing mechanism includes multiple mounting ring blocks fixedly installed on the inner sidewall of the upper and lower decarbonization tower bodies, and a reinforcing decarbonization mesh is fixedly installed at the bottom of the mounting ring blocks.

[0015] Preferably, the mounting ring block and the reinforcing decarburization mesh are detachably connected by multiple connecting bolts.

[0016] Preferably, the distance between two adjacent reinforcing decarburization nets is the same.

[0017] The beneficial effects of this utility model are as follows:

[0018] Through the interaction of the upper decarbonization tower, lower decarbonization tower, jetting mechanism, circulating decarbonization mechanism, and reinforcing mechanism, the upper and lower decarbonization towers are detachably connected for easy maintenance and repair. The annular ventilation chamber in the jetting mechanism works with the nozzle to ensure that natural gas is evenly distributed within the tower, significantly increasing the gas-liquid contact area and improving decarbonization reaction efficiency. The circulating decarbonization mechanism uses a circulating pump to drive the decarbonization solvent circulation, which is then evenly sprayed through a zigzag pipeline and nozzles to achieve full gas-liquid counter-current contact, ensuring continuous and stable decarbonization process. The reinforcing decarbonization mesh further optimizes the gas-liquid mass transfer effect. The overall integrated design effectively improves decarbonization efficiency, simplifies the process flow, reduces energy consumption and maintenance costs, and ensures the high efficiency and stability of LNG production. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of an integrated LNG decarbonization, regeneration, condensation and separation device proposed in this utility model;

[0020] Figure 2 is a bottom view of the upper decarbonization tower in an integrated LNG decarbonization, regeneration, condensation and separation device proposed in this utility model.

[0021] Figure 3 is a schematic diagram showing the distribution of multiple nozzles in the lower decarbonization tower of an integrated LNG decarbonization, regeneration, condensation and separation device proposed in this utility model.

[0022] In the diagram: 1. Upper decarbonization tower body; 2. Lower decarbonization tower body; 3. Bolt pair; 4. Annular ventilation chamber; 5. Natural gas inlet pipe; 6. Connecting joint; 7. Nozzle; 8. Bending inlet pipe; 9. Bending outlet pipe; 10. Connecting pipe; 11. Circulating pump body; 12. Regeneration unit; 13. Condensation separation component; 14. Drain pipe; 15. Connecting plate; 16. Nozzle; 17. Three-way valve; 18. Make-up pipe; 19. Mounting ring block; 20. Reinforcing decarbonization mesh. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Referring to Figures 1-3, an integrated LNG decarbonization, regeneration, condensation, and separation device includes an upper decarbonization tower 1 and a lower decarbonization tower 2. The upper decarbonization tower 1 and the lower decarbonization tower 2 are detachably connected by multiple sets of bolt pairs 3. An air jetting mechanism is provided on the outer wall of both the upper decarbonization tower 1 and the lower decarbonization tower 2. The air jetting mechanism includes multiple annular ventilation chambers 4 opened inside the upper decarbonization tower 1 and the lower decarbonization tower 2. Natural gas inlet pipes 5 are fixedly installed on the outer wall of both the upper decarbonization tower 1 and the lower decarbonization tower 2. The natural gas inlet pipes 5 and the annular ventilation chambers 4 are fixedly connected by connecting joints 6. Multiple nozzles 7 communicating with the annular ventilation chambers 4 are fixedly installed on the inner wall of both the upper decarbonization tower 1 and the lower decarbonization tower 2.

[0025] To further explain, the upper decarbonization tower body 1 and the lower decarbonization tower body 2 are detachably connected by bolt pairs 3, which facilitates the installation, disassembly and maintenance of the equipment.

[0026] To further explain, the arrangement of the annular ventilation chamber 4, natural gas inlet pipe 5, connecting joint 6, and nozzle 7 in the jetting mechanism allows natural gas to be evenly injected into the interior of the upper decarbonization tower 1 and the lower decarbonization tower 2, ensuring full contact with the decarbonization medium and improving decarbonization efficiency.

[0027] As shown in Figure 1, the top of the upper decarbonization tower 1 and the bottom of the lower decarbonization tower 2 are connected by a circulating decarbonization mechanism. The circulating decarbonization mechanism includes a folded inlet pipe 8 fixedly installed at the top of the upper decarbonization tower 1, a folded outlet pipe 9 fixedly installed at the bottom of the lower decarbonization tower 2, and the folded inlet pipe 8 and the folded outlet pipe 9 are fixedly connected by a connecting pipe 10. A circulating pump body 11 connected to the folded outlet pipe 9 is fixedly installed at the bottom of the lower decarbonization tower 2.

[0028] To further explain, the circulating decarbonization mechanism utilizes the circulating pump body 11, the folded inlet pipe 8, the folded outlet pipe 9, and the connecting pipe 10 to achieve the recycling of the decarbonization medium and ensure the continuity of the decarbonization process.

[0029] As shown in Figure 1, a regeneration unit 12 and a condensation separation component 13 are fixedly installed on the folded liquid outlet pipe 9, and a drain pipe 14 is fixedly installed at the bottom of the condensation separation component 13.

[0030] To further explain, the regeneration unit 12 and the condensation separation component 13 can regenerate and condense the decarbonized medium, effectively recycle the medium and separate impurities, reduce production costs and reduce resource waste, and the drain pipe 14 facilitates the discharge of the separated liquid.

[0031] As shown in Figure 1, a connecting plate 15 is fixedly installed at the end of the folded liquid inlet pipe 8 that extends into the upper decarbonization tower body 1, and multiple nozzles 16 are fixedly installed at the bottom of the connecting plate 15.

[0032] To further explain, nozzle 16 can evenly spray the decarbonization medium into the upper decarbonization tower 1, increasing the contact area between the medium and natural gas and improving the decarbonization effect.

[0033] As shown in Figures 1 and 3, multiple nozzles 7 are arranged in a ring array on the inner wall of the upper decarbonization tower 1 or the inner wall of the lower decarbonization tower 2.

[0034] To further explain, this design allows natural gas to be distributed more evenly within the upper decarbonization tower 1 and the lower decarbonization tower 2, ensuring comprehensive and full contact with the decarbonization medium, thereby further improving decarbonization efficiency and effectiveness.

[0035] As shown in Figure 1, a three-way valve 17 is fixedly installed on the outer wall of the folded inlet pipe 8, and a replenishment pipe 18 is fixedly installed on the top valve port of the three-way valve 17.

[0036] To further explain, this design allows for timely replenishment of the decarbonization medium when it is insufficient, ensuring the continuous and stable operation of the decarbonization process and preventing the decarbonization effect from being affected by the lack of medium.

[0037] As shown in Figures 1 and 2, a reinforcing mechanism is provided on the inner sidewall of both the upper decarbonization tower body 1 and the lower decarbonization tower body 2. The reinforcing mechanism includes multiple mounting ring blocks 19 fixedly installed on the inner sidewall of the upper decarbonization tower body 1 and the lower decarbonization tower body 2. A reinforcing decarbonization mesh 20 is fixedly installed at the bottom of the mounting ring block 19.

[0038] To further explain, the reinforced structure can increase the contact area between the decarbonization medium and natural gas, while also supporting and strengthening the inner wall of the tower, improving the structural strength of the tower, and ensuring the stability of equipment operation; the reinforced decarbonization mesh 20 can also guide the natural gas to a certain extent, optimizing the decarbonization process.

[0039] As shown in Figure 1, the mounting ring block 19 and the reinforcing decarburized mesh 20 are detachably connected by multiple connecting bolts.

[0040] To further explain, this design facilitates the installation, disassembly, and replacement of the enhanced decarbonization mesh 20, making equipment maintenance and repair easier and extending the equipment's service life.

[0041] As shown in Figure 1, the distance between two adjacent reinforcing decarburization meshes 20 is the same.

[0042] To further explain, this design makes the decarbonization process more uniform and stable, ensuring that the decarbonization effect of natural gas is consistent in all areas of the upper decarbonization tower 1 and the lower decarbonization tower 2, thereby improving the overall decarbonization quality and efficiency.

[0043] The functional principle of this utility model can be explained through the following operation methods:

[0044] Operating the circulating decarbonization process: Start the circulating pump 11 at the bottom of the lower decarbonization tower 2. The decarbonized medium (such as amine solutions including monoethanolamine MEA, diethanolamine DEA, methyldiethanolamine MDEA, etc.) is transported to the connecting pipe 10 through the folded liquid outlet pipe 9, and then returned to the upper decarbonization tower 1 through the folded liquid inlet pipe 8. The connecting plate 15 and the nozzle 16 at the end of the folded liquid inlet pipe 8 spray the medium evenly into the upper decarbonization tower 1, forming gas-liquid countercurrent contact, and realizing the decarbonization treatment of natural gas.

[0045] Start the jetting mechanism: Open the natural gas inlet pipe 5 valve on the outer wall of the upper decarbonization tower 1 and the lower decarbonization tower 2. Natural gas enters the annular ventilation chamber 4 through the connecting joint 6 and is evenly sprayed into the interior of the upper decarbonization tower 1 and the lower decarbonization tower 2 through multiple nozzles 7 on the inner wall. The nozzles 7 are distributed in a ring array to ensure that the natural gas forms a uniform airflow in the upper decarbonization tower 1 and the lower decarbonization tower 2 and makes full contact with the decarbonization medium.

[0046] Processing regeneration and condensation separation: After decarbonization, the medium enters the folded outlet pipe 9 through the circulating pump body 11. When it flows through the regeneration unit 12, the medium is regenerated to restore its decarbonization capacity. Then it enters the condensation separation component 13 to separate the medium from impurities. The separated liquid is discharged through the bottom drain pipe 14. The regenerated medium continues to participate in the circulation.

[0047] Replenishing decarbonization medium: When the decarbonization medium is insufficient, fresh medium is replenished into the system through the three-way valve 17 on the outer wall of the folded inlet pipe 8 via the replenishment pipe 18 to ensure the continuous and stable decarbonization process.

[0048] Equipment maintenance: If the reinforced decarbonization screen 20 needs to be repaired or replaced, loosen the connecting bolts between the mounting ring block 19 and the reinforced decarbonization screen 20, remove the old screen and install the new screen. When the equipment is shut down, close the natural gas inlet pipe 5 valve and the circulating pump body 11, and regularly check the tightness of the bolt pair 3 connection to ensure that the upper decarbonization tower body 1 and the lower decarbonization tower body 2 are reliably sealed.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated LNG decarbonization, regeneration, condensation, and separation device, comprising an upper decarbonization tower (1) and a lower decarbonization tower (2), characterized in that, The upper decarbonization tower (1) and the lower decarbonization tower (2) are detachably connected by multiple sets of bolt pairs (3). An air jetting mechanism is provided on the outer walls of both the upper decarbonization tower (1) and the lower decarbonization tower (2). The air jetting mechanism includes multiple annular ventilation chambers (4) located inside the upper decarbonization tower (1) and the lower decarbonization tower (2). A natural gas inlet pipe (5) is fixedly installed on the outer walls of both the upper decarbonization tower (1) and the lower decarbonization tower (2). The natural gas inlet pipe (5) and the annular ventilation chamber (4) are fixedly connected by a connecting joint (6). The upper decarbonization tower (1) and the lower decarbonization tower... (2) Multiple nozzles (7) connected to the annular ventilation chamber (4) are fixedly installed on the inner wall; the top of the upper decarbonization tower (1) and the bottom of the lower decarbonization tower (2) are connected by a circulating decarbonization mechanism; the circulating decarbonization mechanism includes a folded liquid inlet pipe (8) fixedly installed on the top of the upper decarbonization tower (1), a folded liquid outlet pipe (9) fixedly installed on the bottom of the lower decarbonization tower (2), the folded liquid inlet pipe (8) and the folded liquid outlet pipe (9) are fixedly connected by a connecting pipe (10), and a circulating pump body (11) connected to the folded liquid outlet pipe (9) is fixedly installed at the bottom of the lower decarbonization tower (2).

2. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 1, characterized in that, A regeneration unit (12) and a condensation separation component (13) are fixedly installed on the folded liquid outlet pipe (9), and a drain pipe (14) is fixedly installed at the bottom of the condensation separation component (13).

3. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 1, characterized in that, The end of the folded liquid inlet pipe (8) extending into the upper decarbonization tower body (1) is fixedly installed with a connecting plate (15), and multiple nozzles (16) are fixedly installed at the bottom of the connecting plate (15).

4. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 1, characterized in that, Multiple nozzles (7) are arranged in a ring array on the inner wall of the upper decarbonization tower (1) or the inner wall of the lower decarbonization tower (2).

5. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 1, characterized in that, A three-way valve (17) is fixedly installed on the outer wall of the folded inlet pipe (8), and a replenishment pipe (18) is fixedly installed on the top valve port of the three-way valve (17).

6. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 1, characterized in that, The upper decarbonization tower (1) and the lower decarbonization tower (2) are both provided with a reinforcing mechanism. The reinforcing mechanism includes multiple mounting ring blocks (19) fixedly installed on the inner walls of the upper decarbonization tower (1) and the lower decarbonization tower (2). A reinforcing decarbonization mesh (20) is fixedly installed at the bottom of the mounting ring block (19).

7. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 6, characterized in that, The mounting ring block (19) and the reinforcing decarburized mesh (20) are detachably connected by multiple connecting bolts.

8. The LNG decarbonization, regeneration, condensation, and separation integrated device according to claim 6, characterized in that, The distance between any two adjacent reinforced decarburization nets (20) is the same.

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