Pretreatment device for natural gas liquefaction

Abstract

The utility model discloses a pretreatment device for natural gas liquefaction, and particularly relates to the technical field of natural gas liquefaction, the pretreatment device comprises a treatment tank, one side of the treatment tank is connected with a tank door through a hinge, a fixed disc is arranged in the treatment tank, and a filtering mechanism is arranged in the fixed disc; wherein the filtering mechanism comprises a mounting groove formed in the surface of the fixed disc, an arc-shaped filtering plate is arranged in the mounting groove, a placement groove is formed in the surface of the arc-shaped filtering plate, an adsorption ball is arranged in the placement groove, clamping columns are arranged on the two sides of the arc-shaped filtering plate, and clamping sleeves movably sleeve the clamping columns; wherein a spring is arranged on one side of the clamping sleeve. According to the device, acid gas in natural gas can be physically adsorbed, generated sulfur oxide is removed, so that the removal effect is achieved, and the filtering effect is improved through multi-layer filtering.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas liquefaction, and more specifically, to a pretreatment device for natural gas liquefaction. Background Art

[0002] Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere. The definition of "natural gas" that people have long used is a narrow definition from the perspective of energy, which refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally stored in the strata.

[0003] Before existing natural gas is put into use, it often needs to be pressurized in liquid storage tanks to liquefy the natural gas, thereby increasing the storage capacity of natural gas. In addition, natural gas carries a large amount of dust and oil smoke after being collected, and its cleanliness is extremely low.

[0004] After searching, a Chinese patent with publication number CN214612334U discloses a pretreatment device for natural gas liquefaction. The structure is convenient for users to disassemble and install the filter screen through the matching design of the filter screen and the retaining rings 1 and 2, thereby facilitating the cleaning and replacement of the filter screen. The operation is simple and easy to use, which reduces the work difficulty of the staff. The design of the filter screen cools the natural gas. During cooling, the natural gas effectively slows down the flow speed through the baffle.

[0005] However, when this structure is actually used, the natural gas is filtered through the filter, but the filtering effect is single, and only the dust impurities in the natural gas are filtered. The natural gas contains a large amount of impurities and sulfur oxides, and direct discharge will pollute the environment. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides a pretreatment device for natural gas liquefaction to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A pretreatment device for natural gas liquefaction, comprising a treatment tank, one side of the treatment tank is connected to a tank door via a hinge, a fixed disk is arranged inside the treatment tank, and a filtering mechanism is arranged inside the fixed disk;

[0009] The filtering mechanism includes a mounting groove provided on the surface of the fixed disk, an arc-shaped filter plate is arranged inside the mounting groove, a placement groove is provided on the surface of the arc-shaped filter plate, an adsorption ball is arranged inside the placement groove, clamping columns are arranged on both sides of the arc-shaped filter plate, a clamping sleeve is movably sleeved on the clamping column, a spring is arranged on one side of the clamping sleeve, a fixing column is arranged on one side of the spring, and the top of the arc-shaped filter plate is connected to a cover net via a hinge.

[0010] By adopting the above technical solution: in order to physically adsorb the acid gas in the natural gas, the generated sulfur oxides are removed to achieve the removal effect.

[0011] As a further description of the above technical solution: a first filter disc is arranged inside the processing tank, a first filter plate is arranged at the bottom of the first filter disc, coarse filter cotton is arranged on the top of the first filter plate, a second filter disc is arranged on the top of the first filter disc, a second filter plate is arranged at the bottom of the second filter disc, and fine filter cotton is arranged on the top of the second filter plate.

[0012] By adopting the above technical solution: for preliminary filtration, solid particles, dust, fine particles and impurities in natural gas are filtered.

[0013] As a further description of the above technical solution: a first inclined plate is arranged on the top of the second filter disc, a second inclined plate is arranged on the top of the first inclined plate, a sealing ring is arranged on one side of the tank door, a handle is arranged on the other side of the tank door, a discharge pipe is arranged on the top of the processing tank, a sealing cover is arranged on the top of the discharge pipe, and an inlet pipe is arranged at the bottom of the processing tank.

[0014] By adopting the above technical solution, it is convenient to disassemble and replace the filter mechanism, and the practicality is also enhanced.

[0015] Technical effects and advantages of the utility model:

[0016] 1. By setting up the filtering mechanism, compared with the prior art, the design of the first inclined plate and the second inclined plate can guide the flow of natural gas, so that the natural gas flows upward through the arc filter plate. The arc filter plate with a mesh structure can further filter the natural gas. At the same time, the adsorption balls inside the arc filter plate are made of activated carbon material. The solid adsorbent activated carbon is used to physically adsorb the acid gas to achieve the removal effect, thereby further ensuring the cleanliness of the natural gas. In addition, by pulling the ferrule on both sides of the arc filter plate, the ferrule is separated from the column, and the arc filter plate can be removed. Then, the cover net can be opened to clean or replace the adsorption balls inside. The operation is simple and convenient.

[0017] 2. By setting coarse filter cotton, fine filter cotton, the first inclined plate and the second inclined plate, compared with the prior art, the natural gas contacts the coarse filter cotton inside the first filter plate to remove solid particles and dust in the natural gas, and then is filtered through the fine filter cotton on the surface of the second filter plate to further remove fine particles and impurities, ensuring that the gas cleanliness meets the pretreatment requirements, and then performs preliminary filtration, and is convenient for disassembly and replacement. At the same time, the design of the first inclined plate and the second inclined plate can slow down the flow speed of the natural gas in the processing tank, thereby increasing the contact time between the filter mechanism and the natural gas, and then improving the filtering effect of the natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the filter mechanism structure of the utility model.

[0020] Figure 3 For the utility model Figure 2 Enlarged structural diagram at A in the middle.

[0021] Figure 4 This is a schematic diagram of the internal structure of the processing tank of the utility model.

[0022] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the utility model.

[0023] The accompanying drawings are marked as follows: 1. treatment tank; 2. tank door; 3. fixed plate; 4. arc filter plate; 5. adsorption ball; 6. clamping column; 7. clamping sleeve; 8. spring; 9. fixed column; 10. cover net; 11. first filter disc; 12. first filter plate; 13. coarse filter cotton; 14. second filter disc; 15. second filter plate; 16. fine filter cotton; 17. first inclined plate; 18. second inclined plate; 19. sealing ring; 20. handle; 21. discharge pipe; 22. sealing cover; 23. feed pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. 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.

[0025] The embodiments of this application disclose Figure 1-5A pretreatment device for natural gas liquefaction shown in the figure comprises a treatment tank 1, one side of the treatment tank 1 is connected to a tank door 2 via a hinge, a fixed plate 3 is arranged inside the treatment tank 1, and a filtering mechanism is arranged inside the fixed plate 3;

[0026] The filtering mechanism includes a mounting groove opened on the surface of the fixed plate 3, an arc-shaped filter plate 4 is arranged inside the mounting groove, a placement groove is opened on the surface of the arc-shaped filter plate 4, an adsorption ball 5 is arranged inside the placement groove, a clamping column 6 is arranged on both sides of the arc-shaped filter plate 4, a clamping sleeve 7 is movably sleeved on the clamping column 6, a spring 8 is arranged on one side of the clamping sleeve 7, a fixing column 9 is arranged on one side of the spring 8, the top of the arc-shaped filter plate 4 is connected to a cover net 10 through a hinge, and the adsorption ball 5 inside the arc-shaped filter plate 4 is made of activated carbon material. The solid adsorbent activated carbon is used to physically adsorb the acidic gas to achieve the removal effect, thereby further ensuring the cleanliness of the natural gas. Finally, the natural gas is discharged from the discharge pipe 21 by opening the sealing cover 22, and the ferrule 7 is pulled to both sides of the arc filter plate 4. The ferrule 7 squeezes the spring 8 to deform, thereby driving the ferrule 7 to separate from the column 6, and then the arc filter plate 4 is pulled upward to separate the arc filter plate 4 from the fixed disk 3. After removing the arc filter plate 4, the cover net 10 can be opened to clean or replace the internal adsorption balls 5.

[0027] Reference Figure 2-3 As shown, a first filter disc 11 is arranged inside the processing tank 1, a first filter plate 12 is arranged at the bottom of the first filter disc 11, a coarse filter cotton 13 is arranged on the top of the first filter plate 12, a second filter disc 14 is arranged on the top of the first filter disc 11, a second filter plate 15 is arranged at the bottom of the second filter disc 14, and a fine filter cotton 16 is arranged on the top of the second filter plate 15. Natural gas flows from bottom to top in the processing tank 1, so that it first contacts with the coarse filter cotton 13 inside the first filter disc 11, thereby filtering larger dust and impurities on the surface of the natural gas, removing solid particles and dust in the natural gas, and then filtering through the fine filter cotton 16 on the surface of the second filter plate 15, further removing fine particles and impurities, ensuring that the gas cleanliness meets the pretreatment requirements, and then performing preliminary filtration. The staff can pull the handle 20 to open the tank door 2, and then remove the coarse filter cotton 13 on the first filter plate 12 for cleaning and replacement, and can also remove the fine filter cotton 16 on the second filter plate 15 for cleaning and replacement.

[0028] Reference Figure 3-5As shown, a first inclined plate 17 is provided on the top of the second filter disc 14, a second inclined plate 18 is provided on the top of the first inclined plate 17, a sealing ring 19 is provided on one side of the tank door 2, a handle 20 is provided on the other side of the tank door 2, a discharge pipe 21 is provided on the top of the processing tank 1, a sealing cover 22 is provided on the top of the discharge pipe 21, and an inlet pipe 23 is provided at the bottom of the processing tank 1. The design of the first inclined plate 17 and the second inclined plate 18 can guide the flow of natural gas, so that the natural gas flows upward through the arc filter plate 4, and the arc filter plate 4 with a mesh structure can further filter the natural gas. At the same time, the design of the first inclined plate 17 and the second inclined plate 18 can slow down the flow speed of the natural gas in the processing tank 1, thereby increasing the contact time between the filtering mechanism and the natural gas, and then improving the filtering effect of the natural gas.

[0029] Working principle of the utility model: When the utility model is used, in the natural gas pretreatment process, the natural gas to be treated is connected to the feed pipe 23 through the external natural gas inlet pipe, and the natural gas is transported to the treatment tank 1, so that the natural gas flows from bottom to top in the treatment tank 1, so as to first contact with the coarse filter cotton 13 inside the first filter plate 11, so as to filter the larger dust and impurities on the surface of the natural gas, remove the solid particles and dust in the natural gas, and then filter through the fine filter cotton 16 on the surface of the second filter plate 15, further remove fine particles and impurities, ensure that the gas cleanliness meets the pretreatment requirements, and then perform preliminary filtration;

[0030] Then the natural gas continues to flow upward. The design of the first inclined plate 17 and the second inclined plate 18 can guide the flow of the natural gas, so that the natural gas flows upward through the arc filter plate 4. The arc filter plate 4 with a mesh structure can further filter the natural gas. At the same time, the design of the first inclined plate 17 and the second inclined plate 18 can slow down the flow speed of the natural gas in the processing tank 1, thereby increasing the contact time between the filtering mechanism and the natural gas, and then improving the filtering effect of the natural gas. At the same time, the adsorption ball 5 inside the arc filter plate 4 is made of activated carbon material, and the solid adsorbent activated carbon is used to physically adsorb the acid gas to achieve a removal effect, thereby further ensuring the cleanliness of the natural gas. Finally, the natural gas is discharged from the discharge pipe 21 by opening the sealing cover 22;

[0031] Secondly, when not in use, the staff can pull the handle 20 to open the tank door 2, and then remove the coarse filter cotton 13 on the first filter plate 12 for cleaning and replacement, or remove the fine filter cotton 16 on the second filter plate 15 for cleaning and replacement, and then pull the clamping sleeve 7 to both sides of the arc filter plate 4, the clamping sleeve 7 squeezes the spring 8 to deform, thereby driving the clamping sleeve 7 to separate from the clamping column 6, and then pull the arc filter plate 4 upward to separate the arc filter plate 4 from the fixed plate 3. After removing the arc filter plate 4, open the cover net 10 to clean or replace the internal adsorption ball 5.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pretreatment device for natural gas liquefaction, comprising a treatment tank (1), characterized in that: One side of the processing tank (1) is connected to a tank door (2) via a hinge, a fixed disk (3) is arranged inside the processing tank (1), and a filtering mechanism is arranged inside the fixed disk (3); The filtering mechanism comprises a mounting groove provided on the surface of a fixed plate (3), an arc-shaped filter plate (4) being arranged inside the mounting groove, a placement groove being provided on the surface of the arc-shaped filter plate (4), an adsorption ball (5) being arranged inside the placement groove, clamping columns (6) being arranged on both sides of the arc-shaped filter plate (4), a clamping sleeve (7) being movably sleeved on the clamping column (6), a spring (8) being arranged on one side of the clamping sleeve (7), a fixing column (9) being arranged on one side of the spring (8), and the top of the arc-shaped filter plate (4) being connected to a cover net (10) via a hinge.

2. The pretreatment device for natural gas liquefaction according to claim 1, characterized in that: A first filter disc (11) is arranged inside the treatment tank (1), a first filter plate (12) is arranged at the bottom of the first filter disc (11), and a coarse filter cotton (13) is arranged at the top of the first filter plate (12).

3. The pretreatment device for natural gas liquefaction according to claim 2, characterized in that: A second filter disc (14) is arranged on the top of the first filter disc (11), a second filter plate (15) is arranged on the bottom of the second filter disc (14), and a fine filter cotton (16) is arranged on the top of the second filter plate (15).

4. The pretreatment device for natural gas liquefaction according to claim 3, characterized in that: A first inclined plate (17) is arranged on the top of the second filter disc (14), and a second inclined plate (18) is arranged on the top of the first inclined plate (17).

5. The pretreatment device for natural gas liquefaction according to claim 1, characterized in that: A sealing ring (19) is provided on one side of the tank door (2), and a handle (20) is provided on the other side of the tank door (2).

6. The pretreatment device for natural gas liquefaction according to claim 1, characterized in that: A discharge pipe (21) is arranged at the top of the processing tank (1), a sealing cover (22) is arranged at the top of the discharge pipe (21), and an inlet pipe (23) is arranged at the bottom of the processing tank (1).

Images