Natural gas recovery device

Abstract

The utility model is suitable for the field of natural gas purification and recovery equipment, and provides a natural gas recovery device which comprises an outer shell and a heating bin in the outer shell, and a gap is formed between the heating bin and the outer shell; wherein a plurality of filtering devices are arranged, and each filtering device comprises two separation blades and molecular sieve filler between the two separation blades; a heating cavity is formed in the heating bin; an air inlet penetrating out of the outer shell and an exhaust port communicated with the interior of the outer shell are formed in the top of the heating bin and are communicated through a plurality of parallel heat conduction pipes in the heating cavity; a liquid inlet and a liquid outlet are formed in the heating bin; a plurality of groups of air outlets are formed in the outer shell. Therefore, the natural gas can be fully heated, and the heating adsorption efficiency of water vapor is improved. Meanwhile, workers can flexibly adjust the number of the passing filtering devices according to the flowing speed and the heating efficiency of the natural gas, quantitative distribution of the adsorbent is achieved, and resource waste caused by insufficient or excessive adsorbent is avoided.

Description

Technical Field

[0001] This utility model applies to the field of natural gas purification and recovery equipment, and provides a natural gas recovery device. Background Technology

[0002] Natural gas plays a vital role in modern energy. Natural gas recovery typically requires a series of purification processes to remove impurities and moisture, resulting in purified natural gas. For efficient natural gas recovery, the purification process is crucial, especially the removal of moisture, to ensure the stability of natural gas quality and the safety of its subsequent applications.

[0003] Currently, one of the commonly used purification methods in natural gas recovery systems is thermal adsorption of moisture. The principle is that during the purification process, the natural gas is heated, causing the moisture in it to evaporate fully and be adsorbed by an adsorption medium (such as a molecular sieve). This method utilizes heating to evaporate the moisture in the natural gas into gaseous water vapor, which is then removed from the gas stream by an adsorbent, thus achieving the drying and purification of the natural gas. Thermal adsorption of moisture technology can remove moisture and improve the quality of natural gas, and it is currently the most widely used natural gas purification and recovery method.

[0004] However, current natural gas recovery devices still have certain efficiency issues in heating and adsorbing moisture. Existing natural gas purification and recovery equipment is prone to uneven heating of natural gas, resulting in low water vapor adsorption efficiency. At the same time, the adsorbent cannot be quantitatively distributed according to the natural gas transportation and heating efficiency, leading to problems such as insufficient adsorbent to adapt to the natural gas flow rate or excessive adsorbent, resulting in resource waste. Summary of the Invention

[0005] To address the aforementioned deficiencies, the present invention aims to provide a natural gas recovery device to solve the problems mentioned in the background art. The device includes an outer shell with an internal cavity, a vertically arranged heating chamber installed within the outer shell, and a gap between the outer wall of the heating chamber and the inner wall of the outer shell. Several layers of filtration devices are installed within the gap, each filtration device including two baffles and molecular sieve packing located between the baffles. A heating chamber is located inside the heating chamber. The top of the heating chamber has an air inlet extending through the outer shell and an exhaust outlet communicating with the internal cavity of the outer shell. The air inlet and exhaust outlet are connected by several sets of parallel heat-conducting pipes located inside the heating chamber. The heating chamber has a liquid inlet and an outlet communicating with the heating chamber. The outer shell has several sets of air outlets communicating with the internal cavity of the outer shell.

[0006] Furthermore, the filter device has three sets of upper, middle, and lower outlets inside the outer casing; the air outlet has four sets on the outer casing, namely a first air outlet located at the top of the upper filter device, a second air outlet located between the upper and middle filter devices, a third air outlet located between the middle and lower filter devices, and a fourth air outlet located at the bottom of the lower filter device; the first, second, third, and fourth air outlets are all connected to external recycling equipment through valves and corresponding pipes.

[0007] Furthermore, the heating chamber includes an upper heater cover and a lower heater cover installed at its upper and lower ends; the air inlet and the exhaust outlet are both installed on the upper heater cover, the upper heater cover has a partition inside that can separate the air passages of the air inlet and the exhaust outlet, and the lower heater cover has an inner cavity that communicates with the heat conduction pipe.

[0008] Furthermore, the baffle includes two baffle frames and a perforated plate located between the two baffle frames.

[0009] Furthermore, the baffle frame includes an inner ring plate and an outer ring plate connected to the outside by a plurality of connecting parts.

[0010] Furthermore, a support platform for supporting the heating chamber is fixedly connected to the inner bottom of the outer shell.

[0011] Furthermore, an inspection port is provided on the top of the outer casing.

[0012] This invention utilizes a design with multiple parallel heat pipes inside the heating chamber to increase the heat transfer area, ensuring the natural gas is fully heated and avoiding uneven heating, thus improving the heating and adsorption efficiency of water vapor. Simultaneously, the multiple gas outlets and valves allow operators to flexibly adjust the number of filtration devices the natural gas passes through based on the flow rate and heating efficiency, achieving quantitative distribution of the adsorbent and preventing resource waste caused by insufficient or excessive adsorbent. Furthermore, the adjustable multi-stage filtration and customizable structural design ensure the equipment's versatility and promising future applications. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the device structure;

[0014] Figure 2 This is a top view of the device structure;

[0015] Figure 3 for Figure 2 AA-direction cross section;

[0016] Figure 4 This is an exploded view of the top structure of the heating chamber;

[0017] Figure 5 This is an exploded view of the bottom structure of the heating chamber;

[0018] Figure 6 This is an exploded view of the baffle structure;

[0019] In the diagram: 1-Outer shell; 101-Inspection port; 102-Support platform; 11-Air inlet; 121-First air outlet; 122-Second air outlet; 123-Third air outlet; 124-Fourth air outlet; 2-Heating chamber; 201-Heat pipe; 202-Heating cavity; 21-Liquid inlet; 22-Liquid outlet; 23-Heater upper chamber cover; 231-Baffle; 232-Exhaust port; 24-Heater lower chamber cover; 3-Filter device; 30-Baffle frame; 301-Inner ring plate; 302-Outer ring plate; 303-Connecting part; 304-Perforated plate; 31-Upper baffle; 32-Lower baffle; 33-Molecular sieve packing. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0024] See Figure 1-6 The purpose of this utility model is to provide a natural gas recovery device, including a cylindrical outer shell 1 with an internal cavity. A heating chamber 2, capable of heating natural gas, is vertically installed in the center of the cavity. A gap exists between the outer wall of the heating chamber 2 and the inner wall of the outer shell 1. A heating cavity 202 is located inside the heating chamber 2. The top of the heating chamber 2 has an air inlet 11 extending through the outer shell 1 and an exhaust port 232 communicating with the internal cavity of the outer shell 1. The air inlet 11 and the exhaust port 232 are connected by several sets of parallel heat-conducting pipes 201 located inside the heating cavity 202. The heating chamber 2 also has a liquid inlet 21 and a liquid outlet 22 communicating with the heating cavity 202. The outer shell 1 also has several sets of air outlets communicating with the internal cavity of the outer shell 1.

[0025] Specifically, there is a height difference between the inlet 21 and the outlet 22. The inlet 21 and the outlet 22 are connected to an external heating device and a power device, which can pump heated liquid (or heated gas) through the heating chamber 202, and transfer the heat to the natural gas through the heat pipe 201 to heat the natural gas.

[0026] Several layers of filtration devices 3 are provided between the heating chamber 2 and the outer shell 1. The filtration device 3 includes two baffles and molecular sieve packing 33 located between the baffles. Specifically, the baffles include an upper baffle 31 and a lower baffle 32. That is, the filtration device 3 includes an upper baffle 31, a lower baffle 32 and molecular sieve packing 33 between them, which form a ring structure between the heating chamber 2 and the outer shell 1.

[0027] Specifically, the upper baffle 31 and the lower baffle 32 have the same structure and both serve to block the molecular sieve packing 33. Both the upper baffle 31 and the lower baffle 32 are fixedly connected to the outer shell 1 and the heating chamber 2 via flange structures. Operators can replace the molecular sieve packing 33 between the two by disassembling the upper baffle 31.

[0028] Meanwhile, multiple sets of filter devices 3 are provided between the heating chamber 2 and the outer shell 1. Operators can combine two or more adjacent sets of filter devices 3 according to actual needs to increase the amount of molecular sieve packing 33. Specifically, see attached... Figure 3 As shown, the lower baffle 32 of the upper filter device 3 in the two adjacent filter devices 3 can be removed, and the upper baffle 31 of the lower filter device 3 can be removed. Molecular sieve filler 33 is then filled between the remaining upper baffle 31 and lower baffle 32, so that the device can contain more molecular sieve filler 33, thereby achieving a better adsorption and purification effect.

[0029] Therefore, the natural gas flow path inside this device is as follows: inlet 11, heat conduction pipe 201 inside heating chamber 2, exhaust port 232, one or more sets of filter devices 3, and outlet.

[0030] The purification and recovery process of natural gas in this scheme is as follows: First, natural gas is transported to the inlet 11 via an external conveying device, and then enters the heating chamber 2. The heating chamber has multiple parallel heat-conducting pipes 201, which are used to divert the natural gas. The heat-conducting pipes 201 have good thermal conductivity, which can increase the heat transfer efficiency between the natural gas and the heat transfer medium inside the heating chamber 202. After the natural gas is fully heated, it is discharged from the heating chamber 2 through the exhaust port 232. At this time, it enters the cavity of the outer shell 1 and passes through multiple sets of filter devices 3 in sequence. The water vapor in the natural gas is removed by molecular sieve filtration. Finally, it is discharged from the outlet corresponding to the filter device 3 at the bottom, providing pure natural gas that can be directly recovered, facilitating subsequent operations such as cooling, compression, and storage in subsequent devices.

[0031] Preferably, the filter device 3 has three sets of outlets (upper, middle, and lower) inside the outer casing 1; simultaneously, four sets of outlets are provided on the outer casing 1: a first outlet 121 located at the top of the upper filter device 3, a second outlet 122 located between the upper and middle filter devices 3, a third outlet 123 located between the middle and lower filter devices 3, and a fourth outlet 124 located at the bottom of the lower filter device 3. The first outlet 121, second outlet 122, third outlet 123, and fourth outlet 124 are all connected to external recovery equipment via valves and corresponding pipes. Operators can control the flow of natural gas through multiple filter devices 3 by controlling the flow of different outlets, thus controlling the purification effect. This avoids the problem of excessive adsorbent use and resource waste.

[0032] Preferably, the heating chamber 2 includes an upper heater cover 23 and a lower heater cover 24 installed at its upper and lower ends. The air inlet 11 and the exhaust outlet 232 are both installed on the upper heater cover 23. The upper heater cover 23 has a partition 231 inside that separates the air passages of the air inlet 11 and the exhaust outlet 232. The lower heater cover 24 has an inner cavity communicating with the heat-conducting pipe 201. Thus, natural gas can flow through the air inlet 11, the heat-conducting pipe 201 communicating with the air inlet 11, the lower heater cover 24, the heat-conducting pipe 201 communicating with the exhaust outlet 232, and the exhaust outlet 232, thereby ensuring that the natural gas is fully heated.

[0033] Preferably, the baffle includes two baffle frames 30 and a perforated plate 304 located between the two baffle frames 30. The perforated plate 304 has micropores that allow natural gas to pass through and block the molecular sieve packing 33. The baffle frames 30 are detachably connected to the outer shell 1 and the heating chamber 2 by bolts.

[0034] Preferably, the baffle frame 30 includes an inner ring plate 301 and an outer ring plate 302 connected to the outside by a plurality of connecting portions 303. The inner ring plate 301 is sleeved on the outside of the heating chamber 2, and the connecting portions 303 are evenly arranged around the outer ring side of the inner ring plate 301. The inner ring plate 301, the connecting portions 303, and the outer ring plate 302 are integrally connected. The cooperation of the inner ring plate 301, the connecting portions 303, and the outer ring plate 302 can provide good support for the molecular sieve packing 33.

[0035] Preferably, a support platform 102 for supporting the heating chamber 2 is fixedly connected to the inner bottom of the outer shell 1. The support platform 102 can be detachably connected to the heating chamber 2 by bolts, which makes the assembly of the equipment easier.

[0036] Preferably, the top of the housing 1 is provided with an inspection port 101. The inspection port 101 provides visibility into the interior of the equipment, facilitating maintenance, inspection, and improving equipment safety.

[0037] In summary, during actual use, the operator first delivers natural gas to the inlet 11 via an external conveying device. The natural gas enters the heating chamber 2 from the inlet 11 and then flows through multiple parallel heat-conducting pipes 201 inside the heating chamber 2. The heat-conducting pipes 201 have excellent thermal conductivity; the heated liquid (or gas) is pumped into the heating chamber 202 through the liquid inlet 21 and circulates within the chamber, transferring heat to the natural gas through the heat-conducting pipes 201, ensuring the natural gas is fully heated. The heated natural gas exits the heating chamber 2 from the exhaust port 232 and passes sequentially through multiple sets of filter devices 3. The molecular sieve packing 33 in the filter devices 3 effectively removes water vapor from the natural gas, thereby purifying the natural gas and ensuring its purity meets recovery standards. The purified natural gas is finally discharged from the exhaust port corresponding to the bottom of the lowest filter device 3 currently in use.

[0038] The operator can control the connection between multiple gas outlets in this device, thereby controlling the natural gas to pass through several filtration devices 3 for purification. Specifically, the first gas outlet 121, the second gas outlet 122, the third gas outlet 123, and the fourth gas outlet 124 are all connected to external recovery equipment via valves and pipes. The operator can control the connection of different gas outlets as needed, flexibly adjusting the number of filtration devices the natural gas passes through, thus achieving precise control of the purification effect, avoiding excessive use of adsorbent, and conserving resources. The baffle frame 30 is detachably connected to the outer shell 1 and the heating chamber 2 via bolts, allowing for customized expansion of the number of molecular sieve packing materials 33 used, while also facilitating maintenance and replacement of the molecular sieve packing materials 33.

[0039] Therefore, the device, through the design of multiple parallel heat-conducting pipes 201 inside the heating chamber 2, increases the heat transfer area, ensuring that the natural gas is fully heated, avoiding uneven heating, and improving the heating and adsorption efficiency of water vapor. Simultaneously, the multiple gas outlets and valves allow operators to flexibly adjust the number of filters 3 passing through the natural gas according to the flow rate and heating efficiency, achieving quantitative distribution of the adsorbent and avoiding resource waste caused by insufficient or excessive adsorbent. Furthermore, the adjustable multi-stage filtration and customizable structural design ensure the equipment's versatility and promising application prospects.

[0040] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A natural gas recovery apparatus, characterized by, The device includes an outer shell (1) with an internal cavity, a vertically arranged heating chamber (2) installed inside the outer shell (1), and a gap between the outer wall of the heating chamber (2) and the inner wall of the outer shell (1); a number of filter devices (3) are installed in the gap, and the filter devices (3) include two baffles and molecular sieve packing (33) located between the baffles. The heating chamber (2) is provided with a heating cavity (202) inside; the top of the heating chamber (2) is provided with an air inlet (11) that extends out of the outer shell (1) and an exhaust port (232) that connects to the internal cavity of the outer shell (1). The air inlet (11) and the exhaust port (232) are connected by several sets of parallel heat-conducting pipes (201) provided inside the heating cavity (202); the heating chamber (2) is provided with a liquid inlet (21) and a liquid outlet (22) that connect to the heating cavity (202); the outer shell (1) is provided with several sets of air outlets that connect to the internal cavity of the outer shell (1).

2. The natural gas recovery apparatus of claim 1, wherein, The filter device (3) has three sets of upper, middle and lower sets inside the outer shell (1); the air outlet has four sets on the outer shell (1), namely the first air outlet (121) located at the top of the filter device (3) at the top, the second air outlet (122) located between the upper and middle filter devices (3), the third air outlet (123) located between the middle and lower filter devices (3), and the fourth air outlet (124) located at the bottom of the lower filter device (3); the first air outlet (121), the second air outlet (122), the third air outlet (123) and the fourth air outlet (124) are all connected to external recycling equipment through valves and corresponding pipes.

3. The natural gas recovery apparatus of claim 1, wherein, The heating chamber (2) includes an upper heater cover (23) and a lower heater cover (24) installed at its upper and lower ends; the air inlet (11) and the exhaust outlet (232) are both installed on the upper heater cover (23), the upper heater cover (23) is provided with a partition (231) that can separate the air passages of the air inlet (11) and the exhaust outlet (232), and the lower heater cover (24) is provided with an inner cavity that communicates with the heat conduction pipe (201).

4. The natural gas recovery apparatus of claim 1, wherein, The baffle includes two baffle frames (30) and a perforated plate (304) located between the two baffle frames (30).

5. The natural gas recovery apparatus of claim 4, wherein, The baffle frame (30) includes an inner ring plate (301) and an outer ring plate (302) connected to the outside by a plurality of connecting parts (303).

6. The natural gas recovery apparatus of claim 1, wherein, The inner bottom of the outer shell (1) is fixedly connected to a support platform (102) for supporting the heating chamber (2).

7. The natural gas recovery apparatus of claim 1, wherein, The top of the outer casing (1) is provided with an inspection port (101).

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