Natural gas dehydration regeneration system and moving device

Abstract

The natural gas dehydration regeneration system comprises a natural gas flow adjusting module, the natural gas flow adjusting module comprises a first gas outlet and a second gas outlet, the first gas outlet is connected to a main path gas pipeline, and the second gas outlet is connected to a regeneration gas pipeline; each adsorption drying tower comprises an upper inlet and outlet pipeline and a lower inlet and outlet pipeline, the upper inlet and outlet pipelines are connected with the main path gas pipeline through first-class program control valves respectively, and the upper inlet and outlet pipelines are connected with the regeneration gas pipeline through second-class program control valves respectively; the lower inlet and outlet pipelines are respectively connected with a natural gas output pipeline through a third-class program control valve; at least two adsorption drying towers in the plurality of adsorption drying towers are in an adsorption state at the same time. According to the utility model, a plurality of adsorption drying towers are simultaneously utilized for adsorption, so that the adsorption efficiency can be effectively improved, the adsorbent filling amount is reduced, and the overall adsorption energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of natural gas dehydration technology, specifically to a natural gas dehydration and regeneration system and a mobile device. Background Technology

[0002] If the natural gas feedstock contains moisture, it will freeze on the surface of the heat exchanger and the working part of the throttling valve in the liquefaction unit, causing blockage. Therefore, free water in the feedstock must be removed before liquefaction to bring its dew point to below -70°C. Natural gas dehydration can be classified into three main categories based on its principle: low-temperature dehydration, solvent absorption, and solid desiccant adsorption dehydration.

[0003] Low-temperature dehydration and solvent absorption methods have relatively low dehydration depths. Solid adsorption methods for natural gas dehydration offer higher dehydration depths. Commonly used solid desiccants include alumina, silica gel, molecular sieves, or a combination of these two adsorbents. Alumina and silica gel have lower dehydration depths than molecular sieves, and it is difficult to reach a dew point below -70°C. Molecular sieves have advantages such as strong adsorption selectivity and high adsorption characteristics under low water vapor partial pressure. Therefore, molecular sieve adsorption dehydration processes are widely used in processes requiring deep dehydration.

[0004] Conventional molecular sieve dehydration processes typically employ 2-tower or 3-tower adsorption processes. With 2-tower adsorption, the heating of the regeneration gas in the two towers is discontinuous. Regardless of whether the heat source is electric or thermal oil, this leads to frequent start-ups and shutdowns of the electric heater and furnace, or significant differences in furnace heat load during heating and deheating, and frequent and unstable load adjustments for the thermal oil furnace. With 3-tower adsorption, the regeneration process is continuous. However, when the dehydration unit has a large throughput or the feed gas has a low moisture content, the traditional 3-tower adsorption dehydration process results in larger equipment selection, more adsorbent loading, and higher investment and regeneration energy consumption. Utility Model Content

[0005] This utility model provides a natural gas dehydration and regeneration system and a mobile device, which aims to solve the problems of high energy consumption and poor dehydration effect of existing natural gas dehydration systems.

[0006] In a first aspect, this utility model provides a natural gas dehydration and regeneration system, comprising:

[0007] A natural gas flow regulation module includes a first gas outlet and a second gas outlet. The first gas outlet is connected to the main gas pipeline, and the second gas outlet is connected to the regenerated gas pipeline. The gas discharged from the first gas outlet is the main gas with a first volume percentage, and the gas discharged from the second gas outlet is the regenerated gas with a second volume percentage. The first volume percentage is greater than the second volume percentage.

[0008] Multiple adsorption drying towers, each of which includes an upper inlet and outlet pipe and a lower inlet and outlet pipe. The upper inlet and outlet pipes are respectively connected to the main gas pipeline through a first type of programmable valve, the upper inlet and outlet pipes are respectively connected to the regenerated gas pipeline through a second type of programmable valve, and the lower inlet and outlet pipes are respectively connected to the natural gas output pipeline through a third type of programmable valve.

[0009] At least two of the adsorption drying towers are simultaneously in an adsorption state.

[0010] In some possible embodiments, the natural gas dehydration and regeneration system further includes: a heat recovery heat exchanger and a regenerated gas heater; the upper inlet and outlet pipes of the plurality of adsorption drying towers are respectively connected to the heat recovery heat exchanger via a fourth type of programmable valve; the lower inlet and outlet pipes of the plurality of adsorption drying towers are respectively connected to the heat recovery heat exchanger via a fifth type of programmable valve; and the lower inlet and outlet pipes of the plurality of adsorption drying towers are respectively connected to the regenerated gas heater via a sixth type of programmable valve; the heat recovery heat exchanger and the regenerated gas heater are connected via programmable valves.

[0011] In some possible embodiments, the regenerated gas heater is heated by heat transfer oil, steam, or electricity.

[0012] In some possible embodiments, the natural gas dehydration and regeneration system further includes a regenerated gas cooler connected to the heat recovery heat exchanger.

[0013] In some possible embodiments, the regenerated gas cooler may be cooled by circulating water, air cooling, or chilled water.

[0014] In some possible embodiments, the natural gas dehydration and regeneration system further includes a regenerated gas separator, the inlet of which is connected to the regenerated gas cooler, the outlet of which is connected to the main gas pipeline, and the drain outlet of which is connected to a drain pipeline.

[0015] In some possible embodiments, the natural gas dehydration and regeneration system further includes a benzene removal tower and a dust filter, wherein the inlet of the benzene removal tower is connected to the natural gas output pipeline, and the outlet of the benzene removal tower is connected to the inlet of the dust filter.

[0016] In some possible embodiments, the plurality of adsorption drying towers are four, including a first adsorption drying tower, a second adsorption drying tower, a third adsorption drying tower and a fourth adsorption drying tower; two of the four adsorption drying towers are in an adsorption state, one adsorption drying tower is in a cold blowing state and one adsorption drying tower is in a hot blowing state.

[0017] In some possible embodiments, a coalescing filter is also included, which is connected to the inlet of the natural gas flow regulating module.

[0018] Secondly, this utility model also provides a mobile device, including the natural gas dehydration and regeneration system as described in any of the preceding claims.

[0019] This utility model provides a natural gas dehydration and regeneration system and mobile device, including a natural gas flow regulation module. The module includes a first outlet and a second outlet. The first outlet is connected to the main gas pipeline, and the second outlet is connected to the regeneration gas pipeline. The gas discharged from the first outlet is the main gas with a first volume percentage, and the gas discharged from the second outlet is the regeneration gas with a second volume percentage, where the first volume percentage is greater than the second volume percentage. Multiple adsorption drying towers are included, each with upper inlet and outlet pipes and lower inlet and outlet pipes. The upper inlet and outlet pipes are connected to the main gas pipeline via first-type programmable valves, and to the regeneration gas pipeline via second-type programmable valves. The lower inlet and outlet pipes are connected to the natural gas output pipeline via third-type programmable valves. At least two of the multiple adsorption drying towers are simultaneously in adsorption mode. This utility model utilizes multiple adsorption drying towers simultaneously for adsorption, which can effectively improve adsorption efficiency, reduce adsorbent loading, and lower overall adsorption energy consumption. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of one embodiment of the natural gas dehydration and regeneration system provided in this utility model. Detailed Implementation

[0022] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are 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. They 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" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0027] Please see Figure 1 This utility model provides a novel natural gas dehydration and regeneration system, mainly comprising the following functional modules: a natural gas flow regulation module 1, which includes a first gas outlet and a second gas outlet. The first gas outlet is connected to the main gas pipeline, and the second gas outlet is connected to the regeneration gas pipeline. The gas discharged from the first gas outlet is the main gas with a first volume percentage, and the gas discharged from the second gas outlet is the regeneration gas with a second volume percentage. The first volume percentage is greater than the second volume percentage. Specifically, in actual natural gas dehydration and regeneration scenarios, dehydrating agents and other materials are typically used to adsorb moisture from the natural gas feedstock to achieve dehydration. The moisture adsorbed in the dehydrating agent usually needs to evaporate to restore its water-absorbing function, allowing for reuse of the dehydrating agent for natural gas dehydration, thus improving the utilization rate of the dehydrating agent and reducing consumption. The water adsorbed in the dehydrating agent can be removed by using undehydrated natural gas feedstock. Therefore, the natural gas feedstock can be divided into two parts: a main gas (larger volume) and a regenerated gas (smaller volume). The main gas enters an adsorption drying tower in an adsorption state for water vapor adsorption, resulting in dried natural gas before being discharged. The regenerated gas undergoes further treatment to remove water vapor from the adsorbent. In some embodiments, the first volume percentage can be 90%-95%, and the second volume percentage can be 5%-10%, with the first volume percentage typically much larger than the second. In one specific embodiment, the natural gas flow regulation module can be a flow regulating valve, which separates the natural gas into main gas and regenerated gas.

[0028] Please continue to refer to this. Figure 1The natural gas dehydration and regeneration system also includes multiple adsorption drying towers. These towers are the main modules for adsorbing and dehydrating natural gas, and can switch between adsorption, hot blowing, and cold blowing states to treat the natural gas differently. The multiple adsorption drying towers provided in this invention have identical structures, each including upper and lower inlet / outlet pipes for injecting or discharging natural gas. Specifically, the upper inlet / outlet pipes of the multiple adsorption drying towers are connected to the main gas pipeline via first-type programmable valves, and the upper inlet / outlet pipes are also connected to the regeneration gas pipeline via second-type programmable valves. The main gas, separated by the natural gas flow regulation module, can be injected into different adsorption drying towers under the control of the first-type programmable valves, and the regeneration gas can also be injected into different adsorption drying towers under the control of the second-type programmable valves. The lower inlet / outlet pipes of the multiple adsorption drying towers are also connected to the natural gas output pipeline via third-type programmable valves, allowing the treated and dried natural gas to be discharged. The natural gas dehydration and regeneration system provided by this utility model includes multiple adsorption drying towers, which are respectively in an adsorption state, a cold blowing state, and a hot blowing state. At least two of the multiple adsorption drying towers are in the adsorption state at the same time. When the volume of the natural gas feed gas is large or the water content is high, the water vapor adsorption effect and adsorption efficiency can be guaranteed, avoiding the need to fill too much adsorbent and build larger adsorption drying towers, thereby reducing costs and overall operating energy consumption.

[0029] The natural gas regeneration system provided by this utility model also includes a heat recovery heat exchanger 6 and a regenerated gas heater 7. The upper inlet and outlet pipes of multiple adsorption drying towers are respectively connected to the heat recovery heat exchanger 6 through a fourth type of programmable valve. The lower inlet and outlet pipes of multiple adsorption drying towers are respectively connected to the heat recovery heat exchanger 6 through a fifth type of programmable valve. The lower inlet and outlet pipes of multiple adsorption drying towers are also respectively connected to the regenerated gas heater 7 through a sixth type of programmable valve. The heat recovery heat exchanger 6 and the regenerated gas heater provided by this utility model are also connected by programmable valves.

[0030] Please continue to refer to this. Figure 1The natural gas dehydration and regeneration system also includes a regeneration gas cooler 8 to cool the regeneration gas at high temperatures, thereby removing the water vapor adsorbed in the regeneration gas. The regeneration gas cooler 8 is connected to the heat recovery heat exchanger 6. The natural gas dehydration and regeneration system also includes a regeneration gas separator 9, whose inlet is connected to the regeneration gas cooler 8 and whose outlet is connected to the main gas pipeline. The regeneration gas separator also includes a drain outlet connected to a drain pipe. The regeneration gas separator is mainly used for gas-liquid separation of the cooled regeneration gas, that is, separating the water from the regeneration gas and discharging the separated water outside the boundary. The remaining undischarged gas is returned to the natural gas flow regulation module through the main gas pipeline, mixed with newly entering natural gas feed gas, and then undergoes the dehydration and regeneration process again.

[0031] The natural gas dehydration and regeneration system provided by this utility model also includes a benzene removal tower 10 and a dust filter 11. The benzene removal tower 10 and the dust filter 11 mainly treat the main pipeline gas. The dehydrated natural gas can be transported to the benzene removal tower 10 through a pipeline. Under the action of the benzene removal tower 10, the benzene in the dehydrated natural gas is removed to less than 0.01 μg / m3. Then, the benzene-removed natural gas is transported to the dust filter 11 for dust removal. Finally, the dried, benzene-removed, and dust-removed natural gas is discharged. Therefore, the inlet of the benzene removal tower needs to be connected to the natural gas output pipeline, and the outlet of the benzene removal tower is connected to the inlet of the dust filter system.

[0032] by Figure 1 Taking the illustrated embodiment as an example, the natural gas dehydration and regeneration system includes four adsorption drying towers: a first adsorption drying tower 2, a second adsorption drying tower 3, a third adsorption drying tower 4, and a fourth adsorption drying tower 5. Each of the four adsorption drying towers includes upper inlet and outlet pipes and lower inlet and outlet pipes. The upper inlet and outlet pipes of the four adsorption drying towers are connected to the main gas pipeline via a first-type programmable valve and to the regeneration gas pipeline via a second-type programmable valve. The lower inlet and outlet pipes of the four adsorption drying towers are connected to the natural gas output pipeline via third-type programmable valves. Each of the four adsorption drying towers is filled with molecular sieves to adsorb water vapor from the natural gas, and each of the four adsorption drying towers can switch between adsorption, cold blowing, and hot blowing states. For example, if the first adsorption drying tower 2 is in adsorption state, the second adsorption drying tower 3 is in adsorption state, the third adsorption drying tower 4 is in cold blowing state, and the fourth adsorption drying tower 5 is in hot blowing state:

[0033] The natural gas dehydration and regeneration system provided by this utility model also includes a coalescing filter, which is connected to the inlet of the natural gas flow regulating module. The external natural gas feedstock first needs to enter the coalescing filter, which can perform initial filtration of the natural gas to remove tiny droplets, that is, remove impurities from the natural gas feedstock, before subsequent drying treatment. The natural gas filtered by the coalescing filter will flow along the pipeline to the flow regulating valve and be divided into two paths to obtain main gas and regeneration gas. The main gas will enter the drying tower from the top of the first adsorption drying tower 2 and the second adsorption drying tower 3 for dehydration and adsorption process. The dehydrated and dried main gas will then be discharged from the first adsorption drying tower 2 and the second adsorption drying tower 3 and transported to the natural gas output pipeline. Then the dried main gas will flow to the benzene removal tower 10 for benzene removal treatment. The benzene-removed main gas will flow to the dust filter 11 for dust removal treatment. Finally, the benzene-removed, dust-removed, and dried main gas will be discharged outside the boundary.

[0034] For the regeneration gas, it enters the third and fourth adsorption drying towers 4 and 5 from the top. For the portion of the regeneration gas entering the third adsorption drying tower 4, the tower is currently in a cold-blowing state. However, since the tower has just transitioned from a hot-blowing state to a cold-blowing state, the overall temperature of the tower is relatively high in the initial stage of cold-blowing. This results in the regeneration gas exiting from the lower inlet and outlet pipes of the tower remaining at a high temperature even during the cold-blowing process. In one specific embodiment, the drying tower can be hot-blown to achieve a gas temperature of 260°C, or cold-blown to achieve a gas temperature of 40°C. During the cold-blowing process, the temperature of the regeneration gas exiting the third adsorption drying tower gradually decreases from 260°C to 40°C. The fourth adsorption drying tower 5 is in a hot blowing state. Similarly, the fourth adsorption drying tower 5 switches from a cold blowing state to a hot blowing state. Therefore, in the initial stage of hot blowing, the temperature of the gas discharged from the fourth adsorption drying tower 5 is relatively low. In a specific embodiment, the temperature of the regenerated gas discharged from the fourth adsorption drying tower 5 gradually increases from 40°C to 260°C.

[0035] Therefore, during the entire process where the third adsorption drying tower 4 is in a cold-blowing state and the fourth adsorption drying tower 5 is in a hot-blowing state, the temperature of the regenerated gas discharged from the third adsorption drying tower gradually decreases, while the temperature of the regenerated gas discharged from the fourth adsorption drying tower 5 gradually increases. During this process, the temperature of the regenerated gas discharged from the third adsorption drying tower 4 may be higher than that of the regenerated gas discharged from the fourth adsorption drying tower 5. At this time, the regenerated gas discharged from the third adsorption drying tower will be sent to the regenerated gas heater 7 for heating. After being heated back to 260°C, it will be sent back to the fourth adsorption drying tower for regeneration. This method of heating the regenerated gas before hot blowing eliminates the need for the regenerated gas to rise from a lower temperature to a higher temperature, resulting in a smaller temperature rise and reduced overall energy consumption. When the temperature of the regenerated gas discharged from the third adsorption drying tower 4 is lower than that of the regenerated gas discharged from the fourth adsorption drying tower 5, the regenerated gas discharged from the third adsorption drying tower 4 is first transferred to the heat recovery heat exchanger 6 to exchange heat with the regenerated gas discharged from the fourth adsorption drying tower 5, thereby increasing the temperature of the gas discharged from the third adsorption drying tower 4. After heat exchange, the regenerated gas discharged from the third adsorption drying tower 4 enters the regenerated gas heater 7 for secondary heating. The heated regenerated gas then enters the fourth adsorption drying tower 5 through the bottom for regeneration. Pre-heating the regenerated gas can increase its temperature to some extent, and then further heating the higher-temperature regenerated gas reduces the temperature rise of the regenerated gas, thus reducing energy consumption. After regeneration is complete, the regenerated gas in the fourth adsorption drying tower is cooled to 40°C by sequentially passing through the heat recovery heat exchanger 6 and the regenerated gas cooler 8. The cooled regenerated gas enters the regenerated gas separator 9 for gas-liquid separation, separating the water and discharging it outside the boundary; the separated regenerated gas returns to the flow regulating valve at the system inlet, merges with the new main gas and enters the first adsorption drying tower 2 and the second adsorption drying tower 3 located on the adsorption turntable for adsorption.

[0036] After an adsorption cycle ends, the different adsorption drying towers switch to different operating states. The first adsorption drying tower, which was originally in the adsorption state, switches to hot blowing mode; the third adsorption drying tower, which was in the cold blowing mode, switches to adsorption mode; and the fourth adsorption drying tower, which was in the hot blowing mode, switches to cold blowing mode. For the natural gas dehydration and regeneration system provided by this invention, regardless of the switching state of the adsorption drying towers, at least two adsorption drying towers must be kept in the adsorption state simultaneously. This allows for the use of multiple adsorption drying towers for drying when the natural gas feedstock has a large volume or high water content, reducing the overall system cost and energy consumption. This invention also provides a mobile device, including the natural gas dehydration and regeneration system as described in the preceding claim, which will not be repeated here.

[0037] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0038] The above provides a detailed description of a natural gas dehydration and regeneration system and mobile device provided by the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this utility model. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A natural gas dehydration and regeneration system, characterized in that, include: A natural gas flow regulation module includes a first gas outlet and a second gas outlet. The first gas outlet is connected to the main gas pipeline, and the second gas outlet is connected to the regenerated gas pipeline. The gas discharged from the first gas outlet is the main gas with a first volume percentage, and the gas discharged from the second gas outlet is the regenerated gas with a second volume percentage. The first volume percentage is greater than the second volume percentage. Multiple adsorption drying towers, each of which includes an upper inlet and outlet pipe and a lower inlet and outlet pipe. The upper inlet and outlet pipes are respectively connected to the main gas pipeline through a first type of programmable valve, the upper inlet and outlet pipes are respectively connected to the regenerated gas pipeline through a second type of programmable valve, and the lower inlet and outlet pipes are respectively connected to the natural gas output pipeline through a third type of programmable valve. At least two of the adsorption drying towers are simultaneously in an adsorption state.

2. The natural gas dehydration and regeneration system according to claim 1, characterized in that, The natural gas dehydration and regeneration system further includes: a heat recovery heat exchanger and a regenerated gas heater. The upper inlet and outlet pipes of the multiple adsorption drying towers are respectively connected to the heat recovery heat exchanger through a fourth type of programmable valve. The lower inlet and outlet pipes of the multiple adsorption drying towers are respectively connected to the heat recovery heat exchanger through a fifth type of programmable valve. The lower inlet and outlet pipes of the multiple adsorption drying towers are respectively connected to the regenerated gas heater through a sixth type of programmable valve. The heat recovery heat exchanger and the regenerated gas heater are connected by programmable valves.

3. The natural gas dehydration and regeneration system according to claim 2, characterized in that, The regenerated gas heater uses heat transfer oil, steam, or electric heating for heating.

4. The natural gas dehydration and regeneration system according to claim 2, characterized in that, The natural gas dehydration and regeneration system also includes a regenerated gas cooler, which is connected to the heat recovery heat exchanger.

5. The natural gas dehydration and regeneration system according to claim 4, characterized in that, The regenerated gas cooler can be cooled by circulating water, air cooling, or chilled water.

6. The natural gas dehydration and regeneration system according to claim 4, characterized in that, The natural gas dehydration and regeneration system also includes a regenerated gas separator, the inlet of which is connected to the regenerated gas cooler, the outlet of which is connected to the main gas pipeline, and the outlet of which is connected to the drainage pipeline.

7. The natural gas dehydration and regeneration system according to claim 2, characterized in that, The natural gas dehydration and regeneration system further includes a benzene removal tower and a dust filter. The inlet of the benzene removal tower is connected to the natural gas output pipeline, and the outlet of the benzene removal tower is connected to the inlet of the dust filter.

8. The natural gas dehydration and regeneration system according to claim 1, characterized in that, The plurality of adsorption drying towers comprises four, including a first adsorption drying tower, a second adsorption drying tower, a third adsorption drying tower, and a fourth adsorption drying tower; two of the four adsorption drying towers are in an adsorption state, one adsorption drying tower is in a cold blowing state, and one adsorption drying tower is in a hot blowing state.

9. The natural gas dehydration and regeneration system according to claim 1, characterized in that, It also includes a coalescing filter, which is connected to the inlet of the natural gas flow regulating module.

10. A mobile device, characterized in that, Including the natural gas dehydration and regeneration system as described in any one of claims 1-9.

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