Equipment for stripping concentrated methane from low-concentration gas

Abstract

The equipment comprises a fixed bottom plate, a compressor is arranged on the left side of the upper end of the fixed bottom plate, and a heat exchanger is arranged on the right side of the compressor; the adsorption tower is fixedly mounted on the middle side of the upper end of the fixed bottom plate, a limiting structure is fixedly mounted on the outer side of the upper end of the fixed bottom plate, a protective cover is fixedly mounted on the outer side of the upper end of the limiting structure, and the limiting structure comprises a fixed plate, a mounting plate and a fixed rod; and the heat dissipation hole is formed in the upper surface of the protective cover, a heat dissipation structure is arranged in the heat dissipation hole, the heat dissipation structure comprises a filter screen and a cooling fan, and the filter screen is fixedly installed on the upper side of the interior of the heat dissipation hole. According to the equipment for gas stripping of the concentrated methane from the low-concentration gas, the heat dissipation structure is arranged, the adsorption tower can be cooled, so that the cooling effect of the adsorption tower is improved, the limiting structure is arranged, the protective cover can be limited, and therefore the adsorption tower is protected.

Description

Technical Field

[0001] This utility model relates to the field of low-concentration methane extraction technology, specifically to a device for low-concentration methane extraction. Background Technology

[0002] Equipment for extracting concentrated methane from low-concentration methane gas refers to equipment that extracts high-concentration methane from low-concentration methane gas. It mainly uses physical or chemical methods to increase the methane concentration from 1%-30% to a usable level. The core of the equipment uses hydrophobic silica-alumina zeolite molecular sieves and other adsorbents, and separates methane through pressure adsorption-depressurization desorption cycle.

[0003] Based on existing solutions and actual production and processing applications, current equipment for extracting concentrated methane from low-concentration methane using natural gas still has some problems, such as:

[0004] When cooling the adsorption tower in a low-concentration methane stripping equipment, the cooling effect is limited by using a heat exchanger, which affects the service life of the adsorption tower.

[0005] Since the adsorption tower, compressor, and other structures in the low-concentration methane extraction equipment are directly exposed to the air, they are susceptible to impact, which can lead to damage. Therefore, this invention provides a low-concentration methane extraction equipment to solve the aforementioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a device for extracting and concentrating methane from low-concentration methane gas, in order to solve the problems mentioned in the background art. These problems include the limited cooling effect of the adsorption tower when cooled via a heat exchanger, which affects the service life of the adsorption tower; and the fact that the adsorption tower, compressor, and other structures in the low-concentration methane gas extraction and concentration device are directly exposed to the air, leading to impact damage to these structures.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a device for extracting concentrated methane from low-concentration gas, comprising a fixed base plate, a compressor disposed on the upper left side of the base plate, a heat exchanger disposed on the right side of the compressor, and a buffer tank disposed on the right side of the heat exchanger.

[0008] Also includes:

[0009] An adsorption tower is fixedly installed on the upper middle side of a fixed base plate, and a limiting structure is fixedly installed on the upper outer side of the fixed base plate. A protective cover is fixedly installed on the upper outer side of the limiting structure. The limiting structure includes a fixed plate, a mounting plate, and a fixing rod. The fixed plate is installed on the upper outer side of the fixed base plate, and the mounting plate is connected to the upper outer side of the fixed plate. A fixing rod is connected to the lower side of the mounting plate, and the outer side of the mounting plate is connected to the protective cover.

[0010] The heat dissipation holes are located on the upper surface of the protective cover, and a heat dissipation structure is provided inside the heat dissipation holes. The heat dissipation structure includes a filter screen and a cooling fan. The filter screen is fixedly installed on the upper side inside the heat dissipation holes, and a cooling fan is provided on the lower side inside the heat dissipation holes.

[0011] Preferably, the adsorption tower is equipped with an HNA-599 carbon-based molecular sieve.

[0012] Preferably, the protective cover has a mounting hole on the front middle side, and a blocking connecting plate is hinged inside the mounting hole. A mounting connecting plate is installed on the left middle side of the blocking connecting plate, and a limit rod is connected to the left side of the mounting connecting plate.

[0013] Preferably, the cooling fans are evenly distributed on the upper side of the protective cover and play a role in cooling the adsorption tower.

[0014] Preferably, the fixing plate and the mounting plate are connected by a snap-fit ​​mechanism, and the fixing plates are symmetrically distributed about the center line of the fixing base plate.

[0015] Preferably, the mounting plate and the fixing rod are connected by a thread, and the vertical cross-section of the mounting plate is an "L" shaped structure.

[0016] Preferably, the blocking connecting plate and the mounting connecting plate are fixedly connected by welding, and the cross-sectional shape of the mounting connecting plate is an "L" shape.

[0017] Preferably, the mounting connecting plate and the limiting rod are connected by a thread and the mounting connecting plate is blocked.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the equipment for extracting concentrated methane from low-concentration gas is equipped with a heat dissipation structure, which can cool down the adsorption tower, thereby improving the cooling effect of the adsorption tower, and is also equipped with a limiting structure, which can limit the protective cover, thereby protecting the adsorption tower.

[0019] By placing the protective cover on the upper side of the fixed base plate, the protective cover moves the mounting plate downwards, thereby engaging the mounting plate on the upper side of the fixed plate. Rotating the fixing rod causes it to be threaded on the lower outer side of the protective cover, thus moving the fixing rod inwards and threading it on the upper side of the fixed plate. This allows the fixing rod to be threaded on the lower inner side of the fixed plate, facilitating the limiting of the protective cover and thus protecting structures such as adsorption towers.

[0020] The heat exchanger on the right side of the compressor can cool the raw gas entering the adsorption tower, thereby cooling the adsorption tower. Then, by starting the cooling fan, the cooling fan draws outside air into the heat dissipation holes, so that the drawn air acts on the adsorption tower, thereby cooling the adsorption tower and facilitating further cooling of the adsorption tower.

[0021] By rotating the limiting rod, the limiting rod is threaded onto the left side of the mounting plate, causing the limiting rod to move forward. This allows the limiting rod to separate from the left front end of the protective cover. Pulling the blocking connecting plate causes it to rotate forward through the hinge inside the mounting hole, thus separating the blocking connecting plate from the mounting hole. This facilitates maintenance of structures such as the adsorption tower inside the protective cover. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the connection between the fixed base plate and the compressor of this utility model;

[0023] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0024] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B;

[0025] Figure 4 This is a schematic cross-sectional view of the connection between the protective cover and the fixed base plate of this utility model.

[0026] Figure 5 This utility model Figure 4 Enlarged structural diagram at point C;

[0027] Figure 6 This is a schematic diagram of the overall structure of the connection between the fixed base plate and the heat exchanger of this utility model.

[0028] In the diagram: 1. Fixed base plate; 2. Compressor; 3. Heat exchanger; 4. Buffer tank; 5. Adsorption tower; 6. Protective cover; 7. Filter screen; 8. Cooling fan; 9. Fixed plate; 10. Mounting plate; 11. Fixed rod; 12. Heat dissipation hole; 13. Blocking connecting plate; 14. Mounting hole; 15. Mounting connecting plate; 16. Limiting rod. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-6 This utility model provides a technical solution: a device for extracting concentrated methane from low-concentration gas, comprising a fixed base plate 1, a compressor 2, a heat exchanger 3, a buffer tank 4, an adsorption tower 5, a protective cover 6, a filter screen 7, a cooling fan 8, a fixed plate 9, a mounting plate 10, a fixing rod 11, heat dissipation holes 12, a blocking connecting plate 13, mounting holes 14, a mounting connecting plate 15, and a limiting rod 16. In operation, the specific details are as follows... Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, a fixed plate 9 is fixedly installed on the outer side of the upper end of a fixed base plate 1. A mounting plate 10 is movably connected to the upper side of the fixed plate 9. A protective cover 6 is fixedly installed on the outer side of the mounting plate 10. A fixed rod 11 is movably connected to the outer side of the lower end of the protective cover 6. An adsorption tower 5 is fixedly installed on the middle side of the upper end of the fixed base plate 1. The protective cover 6 is placed on the upper side of the fixed base plate 1, so that under the action of gravity, the protective cover 6 drives the mounting plate 10 to move downward. Under the downward movement of the mounting plate 10, the mounting plate 10 is engaged with the upper side of the fixed plate 9. Then, the fixed rod 11 is screwed, so that the fixed rod 11 is threaded on the outer side of the lower end of the protective cover 6. Under the thread action between the fixed rod 11 and the protective cover 6, the fixed rod 11 moves inward. Under the inward movement of the fixed rod 11, the fixed rod 11 is threaded on the upper side of the fixed plate 9. The moving action causes the fixing rod 11 to be threaded on the inner side of the lower end of the mounting plate 10, which facilitates the limiting of the protective cover 6, thereby facilitating the protection of structures such as the buffer tank 4 and the adsorption tower 5. Then, the raw material gas is transported to the inside of the compressor 2 through the air inlet pipe on the upper side of the compressor 2 for pressurization and then to the inside of the heat exchanger 3 for heat exchange. After heat exchange in the heat exchanger 3, the raw material gas enters the inside of the buffer tank 4, and then enters the inside of the adsorption tower 5. The HNA-599 carbon-based molecular sieve installed inside the adsorption tower 5 enriches and captures the methane component inside the raw material gas. The methane gas and other impurities that are not completely adsorbed are sent to the next adsorption tower 5 through the outlet programmable valve on the front side of the upper end of the adsorption tower 5. During the operation, one adsorption tower 5 is always adsorbing, another adsorption tower 5 is desorbing, and the remaining adsorption towers 5 are equalizing and depressurizing or equalizing and increasing pressure.

[0031] Specific examples Figure 1 and Figure 3 As shown, the heat exchanger 3 located to the right of the compressor 2, through the heat exchange holes 12 on the upper surface of the protective cover 6, the filter screen 7 fixedly installed on the upper side of the heat exchange holes 12, and the cooling fan 8 located on the lower side of the heat exchange holes 12, can circulate and exchange heat with the raw material gas entering the adsorption tower 5, thereby cooling the adsorption tower 5. After the cooling fan 8 is started, the cooling fan 8 draws outside air into the heat exchange holes 12, so that the air enters the interior of the protective cover 6 through the heat exchange holes 12 and acts on the outer shell of the adsorption tower 5, thereby cooling the adsorption tower 5. The filter screen 7 fixedly installed on the upper side of the interior of the protective cover 6 can prevent dust from entering the interior of the protective cover 6 with the air, which would have a certain impact on the adsorption tower 5.

[0032] Specific examples Figure 1 , Figure 4 and Figure 5As shown, a mounting hole 14 is opened on the middle side of the front end of the protective cover 6. A blocking connecting plate 13 is hinged inside the mounting hole 14. A mounting connecting plate 15 is fixedly installed on the left side of the front end of the blocking connecting plate 13. A limiting rod 16 is movably connected to the left side of the front end of the mounting connecting plate 15. By manually turning the limiting rod 16 installed on the left side of the front end of the mounting connecting plate 15, the limiting rod 16 is threadedly connected to the left side of the mounting connecting plate 15. Thus, under the action of the thread between the limiting rod 16 and the mounting connecting plate 15, the limiting rod 16 moves forward. Then, under the forward movement of the limiting rod 16, the limiting rod 16 is separated from the left side of the front end of the protective cover 6. Then, the blocking connecting plate 13 is manually pulled, so that under the action of the pulling force, the blocking connecting plate 13 rotates inside the mounting hole 14 through the hinge. Thus, under the action of the rotation of the blocking connecting plate 13, the blocking connecting plate 13 drives the mounting connecting plate 15 to separate on the front side of the protective cover 6. Then, under the action of the rotation of the blocking connecting plate 13, the blocking connecting plate 13 is separated inside the mounting hole 14, which facilitates the maintenance of the internal structure of the protective cover 6.

[0033] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for extracting concentrated methane from low-concentration gas, comprising a fixed base plate (1), a compressor (2) is provided on the left side of the upper end of the base plate (1), a heat exchanger (3) is provided on the right side of the compressor (2), and a buffer tank (4) is provided on the right side of the heat exchanger (3). Its features are, Also includes: The adsorption tower (5) is fixedly installed on the upper middle side of the fixed base plate (1), and a limiting structure is fixedly installed on the upper outer side of the fixed base plate (1). A protective cover (6) is fixedly installed on the upper outer side of the limiting structure. The limiting structure includes a fixing plate (9), an mounting plate (10) and a fixing rod (11). The fixing plate (9) is installed on the upper outer side of the fixed base plate (1), and the mounting plate (10) is connected to the upper outer side of the fixing plate (9). The fixing rod (11) is connected to the lower side of the mounting plate (10), and the outer side of the mounting plate (10) is connected to the protective cover (6). A heat dissipation hole (12) is provided on the upper surface of the protective cover (6), and a heat dissipation structure is provided inside the heat dissipation hole (12). The heat dissipation structure includes a filter screen (7) and a cooling fan (8). The filter screen (7) is fixedly installed on the upper side inside the heat dissipation hole (12), and a cooling fan (8) is provided on the lower side inside the heat dissipation hole (12).

2. The equipment for extracting concentrated methane from low-concentration gas according to claim 1, characterized in that: The adsorption tower (5) is equipped with HNA-599 carbon-based molecular sieve.

3. The equipment for extracting concentrated methane from low-concentration gas according to claim 1, characterized in that: The protective cover (6) has an installation hole (14) on the middle side of the front end, and the interior of the installation hole (14) is connected to a blocking connecting plate (13) via a hinge. The middle side of the left end of the blocking connecting plate (13) is equipped with an installation connecting plate (15), and the left side of the installation connecting plate (15) is connected to a limit rod (16).

4. The equipment for extracting concentrated methane from low-concentration gas according to claim 1, characterized in that: The cooling fans (8) are evenly distributed on the upper side of the protective cover (6) and play a role in cooling the adsorption tower (5).

5. The equipment for extracting concentrated methane from low-concentration gas according to claim 1, characterized in that: The fixing plate (9) and the mounting plate (10) are connected by a snap-fit ​​method, and the fixing plate (9) is symmetrically distributed about the center line of the fixing base plate (1).

6. The apparatus for extracting concentrated methane from low-concentration gas according to claim 5, characterized in that: The mounting plate (10) and the fixing rod (11) are connected by threads, and the vertical cross-section of the mounting plate (10) is an "L" shaped structure.

7. The apparatus for extracting concentrated methane from low-concentration gas according to claim 3, characterized in that: The blocking connecting plate (13) and the mounting connecting plate (15) are fixedly connected by welding, and the cross-sectional shape of the mounting connecting plate (15) is an "L" shaped structure.

8. The apparatus for extracting concentrated methane from low-concentration gas according to claim 7, characterized in that: The mounting connecting plate (15) and the limiting rod (16) are connected by threads and the limiting rod acts as a stop for the blocking connecting plate (13).

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