Integrated natural gas purification and dehydration device

Abstract

The application belongs to the technical field of natural gas pretreatment, and particularly relates to an integrated natural gas purification and dehydration device, which comprises a natural gas inlet pipe, a rotating impact dehydration assembly and an adsorption dehydration assembly. The rotating impact dehydration assembly is fixed at the top end of the adsorption dehydration assembly through a plurality of supporting rods, and the natural gas inlet pipe is inserted into the top end of the rotating impact dehydration assembly. The rotating impact dehydration assembly comprises a rotatable dehydration cone cylinder with a large upper part and a small lower part, and realizes circumferential rotation impact dehydration in turn in cooperation with a vertical acceleration nozzle. The adsorption dehydration assembly adopts a distribution head that rotates synchronously with the dehydration cone cylinder, so that the adsorption filter element uniformly adsorbs around the whole circumference. The two-stage rotating structure effectively solves the problems in the offshore natural gas dehydration process, such as wear and scale formation in the fixed impact area, secondary entrainment caused by platform swing, low utilization rate of local saturation of the filter element and the like. The overall structure is compact, no additional booster pump is needed, the swing resistance is high, the operation and maintenance cost is low, and the device better adapts to the harsh working conditions of offshore facilities such as FPSO and semi-submersible platforms.

Description

Technical Field

[0001] This invention belongs to the field of natural gas pretreatment technology, and in particular relates to an integrated natural gas purification and dehydration device. Background Technology

[0002] Natural gas, as a highly efficient and clean fuel and an important chemical raw material, must undergo deep dehydration and purification after extraction to meet the requirements of pipeline transportation, compression, external transmission, and cryogenic treatment. Especially in offshore natural gas extraction, natural gas generally contains a large amount of free water, gaseous water, condensate oil, salt spray, and solid dust. Under high pressure and low temperature conditions, natural gas hydrates are easily formed, causing pipeline blockage. At the same time, the combination of moisture and acidic gases can significantly aggravate the corrosion of equipment and pipelines, seriously affecting production safety.

[0003] Currently, offshore natural gas dehydration mostly employs a combination of traditional baffle impact dehydration and fixed filter adsorption processes. However, this process has the following insurmountable drawbacks in offshore applications:

[0004] 1. The fixed impact position of the baffle plate, long-term scouring by high-speed airflow leads to local wear, perforation, and deformation; at the same time, salt ions, condensate oil and solid dust in offshore natural gas will accumulate in large quantities in the fixed impact area, forming hard salt scale and sludge, blocking the flow channel and changing the flow field, causing the dehydration efficiency to drop by more than 30% after 3 to 6 months of operation.

[0005] 2. The continuous swaying of the offshore platform will cause the liquid film separated on the baffle plate to be re-entrained by the airflow, forming a serious secondary entrainment. The secondary entrainment rate can reach 20% to 30%, which greatly reduces the dehydration effect and may even cause the downstream filter element to clog rapidly.

[0006] 3. The fixed outlet position of the natural gas relative to the adsorption filter element causes the area directly facing the air inlet to quickly become saturated within 1 to 2 months, leaving more than 70% of the filter element area idle. The overall adsorption capacity utilization rate is less than 40%, and at the same time, there is serious local accumulation of oil and salt, and the filter element pressure difference rises rapidly. The replacement cycle is only 3 to 6 months, which greatly increases the offshore operation and maintenance costs and downtime risks. Summary of the Invention

[0007] The purpose of this invention is to address the above-mentioned problems by providing an integrated natural gas purification and dehydration device.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an integrated natural gas gas purification and dehydration device, including a natural gas inlet pipe, and further including a rotary impact dehydration component and an adsorption dehydration component. The rotary impact dehydration component is fixed to the top of the adsorption dehydration component by multiple support rods, and the natural gas inlet pipe is fixedly inserted into the top of the rotary impact dehydration component.

[0009] The rotary impact dehydration assembly includes an installation cylinder, inside which a dehydration cone is rotatably sleeved. The upper inner diameter of the dehydration cone is larger than the lower inner diameter. One end of the natural gas inlet pipe located inside the installation cylinder is fixedly connected to a distribution shell. Multiple acceleration nozzles are uniformly fixedly connected to the side wall of the distribution shell. The spray direction of the acceleration nozzles is perpendicular to the inner wall of the dehydration cone. A motor rotation assembly for driving the dehydration cone to rotate is fixed to the inner wall of the installation cylinder.

[0010] Furthermore, an air outlet is integrally connected to the bottom of the dehydration cone. The lower end of the air outlet penetrates the lower end of the mounting cylinder and extends into the adsorption and dehydration assembly. A water storage ring groove is formed between the top of the air outlet and the bottom of the dehydration cone. Multiple centrifugal drainage holes are opened on the side wall of the dehydration cone corresponding to the water storage ring groove. A drainage ring groove is provided on the outer side of the dehydration cone and the mounting cylinder at the position corresponding to the centrifugal drainage holes. Multiple drainage pipes are connected to the side wall of the mounting cylinder corresponding to the drainage ring groove.

[0011] Furthermore, the inner wall of the dehydration cone is uniformly fixed with multiple partition ribs along the circumference, and the multiple partition ribs divide the interior of the dehydration cone into multiple independent fan-shaped impact chambers.

[0012] Furthermore, the upper outer side of the air outlet is inclined outward, so that the upper opening width of the water storage ring groove is smaller than the lower opening width, forming an inverted trapezoidal cross section.

[0013] Furthermore, the inner diameter of the air outlet gradually decreases from top to bottom, forming a gradually narrowing flow channel, and the necking ratio is 1.2 to 1.5:1.

[0014] Furthermore, the adsorption dehydration assembly includes an adsorption circular cover rotatably sleeved on the outside of the bottom of the air outlet cylinder. An adsorption circular shell is detachably fixed to the lower end of the adsorption circular cover. A cylindrical adsorption filter element is fixed inside the adsorption circular shell. A distribution pipe is fixedly connected to one end of the air outlet cylinder located inside the adsorption circular cover. Multiple distribution heads facing the adsorption filter element are uniformly fixedly connected to the lower surface of the distribution pipe. An exhaust pipe is fixedly connected to the lower end of the adsorption circular shell. A mounting bracket is fixed to the outside of the adsorption circular cover.

[0015] Furthermore, the adsorption filter element is a coalescing-adsorption composite filter element, which includes, from the inside out, a glass fiber coalescing layer, an activated alumina adsorption layer, and a molecular sieve deep adsorption layer.

[0016] Furthermore, the adsorption shell and the adsorption cover are connected by a quick-opening flange, and a sealing gasket is provided at the quick-opening flange.

[0017] Compared with existing technologies, the advantages of this invention are as follows:

[0018] 1. The equipment adopts a rotating dewatering cone with a larger top and a smaller bottom, combined with a vertical acceleration nozzle. The low-speed rotation of the cone causes the entire inner wall to be subjected to airflow impact in turn, resulting in uniform wear and avoiding localized rapid wear and perforation. At the same time, it relies on airflow purging and liquid film flushing to achieve self-cleaning, effectively preventing the accumulation of salt scale and sludge in fixed areas. The dewatering efficiency can be kept stable at over 90% for a long time, effectively extending the service life of the equipment and significantly reducing the frequency of high-altitude maintenance at sea.

[0019] 2. The rotation of the dehydration cone ensures that the liquid film is evenly distributed across the entire cone surface, thin and uniform, and flows smoothly down the cone surface, avoiding the problem of excessively thick liquid film at a single point on the fixed baffle. Combined with the independent fan-shaped impact chambers formed by the vertical partition ribs on the inner wall, the water is locked in its respective chambers, preventing cross-flow when the platform sways. The secondary entrainment rate is reduced from the traditional 20% to 30% to below 5%, making it better suited for offshore swaying conditions.

[0020] 3. The distribution tube drives the distribution head to rotate and move relative to the adsorption filter element during the dehydration and purification process, so that the entire circumference of the adsorption filter element comes into contact with moisture in turn, the adsorption load is evenly distributed, the overall adsorption capacity utilization rate is improved, and gas penetration caused by premature local saturation is avoided. In addition, a fixed thick liquid film cannot be formed on the surface of the adsorption filter element in the rotating state, so there will be no liquid accumulation and secondary entrainment when the offshore platform shakes.

[0021] 4. The gas outlet adopts a tapered structure that is larger at the top and smaller at the bottom. When natural gas flows out, it automatically increases speed and pressure, which can directly overcome the resistance of the adsorption filter element, eliminate the need for a booster pump, reduce the number of moving equipment, reduce the failure rate and energy consumption, and is more suitable for unmanned offshore platforms.

[0022] 5. The rotating impact dehydration component and the adsorption dehydration component are integrated and arranged vertically, resulting in a compact overall structure that saves space and better adapts to the space and load constraints of offshore facilities such as FPSOs and semi-submersible platforms. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the overall three-dimensional structure of the dehydration cone of the present invention;

[0026] Figure 4 This is a three-dimensional cross-sectional view of the dehydration cone of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the installation of the distribution shell and the acceleration nozzle of the present invention;

[0028] Figure 6This is a three-dimensional cross-sectional view of the adsorption and dehydration component of the present invention.

[0029] In the diagram: 1 Natural gas inlet pipe, 2 Rotary impact dehydration assembly, 21 Mounting cylinder, 22 Dehydration cone, 23 Distribution shell, 24 Acceleration nozzle, 25 Motor rotation assembly, 26 Air outlet, 27 Water storage ring groove, 28 Centrifugal drain hole, 29 Drainage ring groove, 210 Drain pipe, 211 Separating rib, 3 Adsorption dehydration assembly, 31 Adsorption round cover, 32 Adsorption round shell, 33 Adsorption filter element, 34 Distribution pipe, 35 Distribution head, 36 Exhaust pipe, 37 Mounting bracket, 4 Support rod. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] like Figures 1-6 As shown, the integrated natural gas purification and dehydration device includes a natural gas inlet pipe 1, a rotary impact dehydration component 2, and an adsorption dehydration component 3. The rotary impact dehydration component 2 is fixed to the top of the adsorption dehydration component 3 by multiple support rods 4 to ensure that the two components are arranged coaxially, and that the airflow is smooth, without deviation or short circuit. The natural gas inlet pipe 1 is fixedly inserted at the center of the top of the rotary impact dehydration component 2 to smoothly introduce the pretreated marine natural gas into the device.

[0032] The rotary impact dehydration assembly 2 includes a mounting cylinder 21, which is a vertical pressure-resistant cylinder made of 316L stainless steel or duplex steel commonly used on offshore platforms. It has the ability to resist salt spray, condensate oil and high pressure corrosion. The dehydration cone 22 is rotatably connected to the inside of the mounting cylinder 21 through two sets of sealed bearings. The dehydration cone 22 adopts an inverted frustum structure with a large inner diameter at the upper end and a small inner diameter at the lower end. The cone wall inclination angle is adapted to the requirements of airflow impact and liquid film guidance, and the cone angle is 60° to 75°.

[0033] The natural gas inlet pipe 1 extends downward into the installation cylinder 21, and its lower end is fixedly connected to the distribution shell 23. The distribution shell 23 is an isobaric distribution chamber, and multiple accelerating nozzles 24 are uniformly fixedly connected to the side wall. The injection direction of all accelerating nozzles 24 is perpendicular to the inner wall of the dehydration cone 22 to ensure that the airflow acts on the cone wall with the maximum inertial impact efficiency. The distance between the nozzle outlet and the inner wall of the dehydration cone 22 is preferably 80 mm, and the injection velocity is controlled at 22 m / s. A motor rotating assembly 25, including a drive motor and a transmission gear set, is fixed on the upper part of the inner wall of the installation cylinder 21 to drive the dehydration cone 22 to rotate at a constant speed of 5 r / min to achieve uniform impact of natural gas in the entire circumference.

[0034] The bottom of the dehydration cone 22 is integrally connected to an air outlet 26. The lower end of the air outlet 26 passes through the lower end of the mounting cylinder 21 and extends into the adsorption and dehydration assembly 3, realizing a direct air passage. The upper outer side of the air outlet 26 is inclined outward at 15°, forming a water storage ring groove 27 with the bottom of the dehydration cone 22. The groove is 30mm deep and the water storage ring groove 27 adopts an inverted trapezoidal cross section. The width of the upper opening is smaller than the width of the lower opening, which can significantly improve the stability of liquid storage under marine swaying conditions and prevent liquid overflow and backflow.

[0035] The dehydration cone 22 has six centrifugal drain holes 28 with a diameter of 10 mm evenly opened on the side wall corresponding to the water storage ring tank 27. An annular drain ring groove 29 is provided on the outer side of the dehydration cone 22 and the mounting cylinder 21 at the position corresponding to the centrifugal drain holes 28. The side wall of the mounting cylinder 21 corresponding to the drain ring groove 29 is connected to six symmetrically arranged drain pipes 210, which are used to stably discharge the separated liquid to the external processing system of the platform.

[0036] The inner wall of the dehydration cone 22 is uniformly fixed with 8 vertically arranged partition ribs 211 along the circumference. The height of the partition ribs 211 is the same as the height of the dehydration cone 22. They run through the entire inner wall of the dehydration cone 22 from top to bottom, dividing the interior of the dehydration cone 22 into 8 independent fan-shaped impact chambers, realizing airflow partitioning and liquid partitioning, and greatly improving the dehydration stability under marine swaying conditions.

[0037] The inner diameter of the gas outlet 26 gradually decreases from top to bottom, forming a narrowing flow channel with a necking ratio of 1.3:1. When natural gas flows through, it automatically increases speed and replenishes pressure, meeting the pressure requirements for subsequent adsorption and dehydration without the need for a booster pump.

[0038] The adsorption dehydration assembly 3 includes an adsorption round cover 31 that is rotatably sleeved on the outside of the bottom of the gas outlet cylinder 26. The lower end of the adsorption round cover 31 is detachably fixed with an adsorption round shell 32 through a quick-opening flange. The quick-opening flange is provided with an oil-resistant and corrosion-resistant nitrile rubber sealing gasket. A cylindrical adsorption filter element 33 is fixed inside the adsorption round shell 32. The adsorption filter element 33 has a three-layer composite structure, consisting of a 10μm glass fiber coalescing layer, an activated alumina adsorption layer, and a 4A molecular sieve deep adsorption layer from the inside out. It can sequentially complete the removal of fine mist droplets, the removal of most gaseous water, and the removal of trace amounts of deep water, so that the dew point of the outlet natural gas is stably up to standard.

[0039] One end of the air outlet 26 located inside the adsorption round cover 31 is fixedly connected to a cross-shaped distribution pipe 34. The lower surface of the distribution pipe 34 is uniformly fixedly connected to 14 distribution heads 35 facing the inner wall of the adsorption filter element 33. The distribution pipe 34 rotates synchronously with the air outlet 26. The lower center of the adsorption round shell 32 is fixedly connected to an exhaust pipe 36. Four mounting brackets 37 are fixedly fixed on the outside of the adsorption round cover 31 for fixing the device on the deck of the offshore platform.

[0040] The operating principle of this invention is described as follows: Marine natural gas, after pretreatment and filtration (removal of solid particles ≥50μm and large free liquid streams), is transported through the natural gas inlet pipe 1 to the distribution shell 23 inside the rotating impact dehydration assembly 2. After being evenly distributed within the distribution shell 23, the airflow is vertically sprayed onto the inner surface of the dehydration cone 22 at an optimal flow rate of 22m / s through multiple accelerating nozzles 24 evenly arranged circumferentially on its sidewall. Free water droplets and condensate oil droplets with a particle size ≥20μm in the high-speed airflow, due to their much greater inertia than gas molecules, cannot flow around the airflow and directly impact the inner wall of the dehydration cone 22, coalescing into continuous streams. The liquid film, under the influence of gravity and the guiding effect of the inclined surface of the cone, flows smoothly downward along the inner wall and flows into the water storage ring groove 27 at the bottom of the dehydration cone 22. During this process, the motor rotating assembly 25 drives the dehydration cone 22 to rotate at a constant speed of 5 r / min, so that the airflow ejected from the acceleration nozzle 24 continuously acts on different circumferential positions of the inner wall of the dehydration cone 22, achieving uniform impact around the entire circumference. This completely avoids local high-speed erosion wear, perforation and deformation in the fixed impact area. At the same time, it achieves self-cleaning by airflow purging and liquid film flushing, preventing the accumulation of salt ions, condensate oil and solid dust in offshore natural gas to form salt scale and sludge in local areas.

[0041] The partition ribs 211 on the inner wall of the dehydration cone 22 divide the interior into multiple independent fan-shaped impact chambers, forcing the airflow to flow along a fixed path in each chamber, preventing cross-flow and short circuits, and locking the separated liquid film in the corresponding chamber. Even if the offshore platform experiences a rolling motion of ±15° or pitching motion of ±8°, the water will not cross-flow and overflow in the cone. The secondary entrainment rate can be controlled below 5%. The water storage ring trough 27 adopts an inverted trapezoidal cross-section design (the width of the upper opening is smaller than the width of the lower opening), which can further stabilize the liquid level in the trough and prevent water from overflowing and being sucked up by the airflow during shaking. The liquid collected in the trough generates centrifugal force as the dehydration cone 22 rotates. It is evenly thrown into the outer fixed drainage ring trough 29 through multiple centrifugal drainage holes 28 corresponding to the side wall of the dehydration cone 22, and finally discharged to the platform's oily wastewater treatment system for subsequent treatment through the drainage pipe 210 connected to the side wall of the installation cylinder 21.

[0042] After being subjected to impact coarse dehydration (removing 80% to 95% of free water), the natural gas flows downward into the outlet cylinder 26, which is integrally connected to the dehydration cone 22. The outlet cylinder 26 adopts a gradually narrowing flow channel structure with a larger upper section and a smaller lower section (neck ratio 1.2 to 1.5:1). During the flow of natural gas, the flow rate is automatically increased and the pressure is increased by 0.05 to 0.1 MPa. This pressure increase is sufficient to overcome the bed resistance of the subsequent adsorption filter element 33, and no additional booster pump is required.

[0043] The pressurized natural gas flows out from the lower end of the outlet cylinder 26 and enters the adsorption chamber 31 inside the adsorption and dehydration assembly 3 below. The distribution pipe 34, which is fixedly connected to the bottom of the outlet cylinder 26, rotates synchronously with the outlet cylinder 26 and the dehydration cone 22. The airflow passes through multiple distribution heads 35 evenly arranged on the lower surface of the distribution pipe 34 and is continuously sprayed onto the inner circumferential surface of the cylindrical adsorption filter element 33 fixed inside the adsorption shell 32. The rotating distribution heads 35 cause the entire inner circumferential surface of the adsorption filter element 33 to come into contact with moisture in turn, and the adsorption load is evenly distributed, avoiding the local rapid saturation and gas penetration problems caused by traditional fixed air intake. The overall adsorption capacity utilization rate is increased to more than 90%. At the same time, a fixed thick liquid film cannot be formed on the surface of the filter element in the rotating state, which further prevents secondary entrainment caused by liquid overflow when the platform shakes.

[0044] Natural gas undergoes deep purification by passing through the three-layer composite structure of the adsorption filter element 33 from the inside out. First, it passes through the glass fiber coalescing layer to remove the 0.1-20μm fine droplets that were not separated in the impact section. Then, it enters the activated alumina adsorption layer to remove most of the gaseous water. Finally, it passes through the molecular sieve deep adsorption layer to remove the remaining trace moisture. After three-stage treatment, the dew point of the natural gas water can be stably reduced to below -40℃, which fully meets the requirements for pipeline transportation, compression and cryogenic treatment. Finally, it is transported to the downstream pipeline or compressor through the exhaust pipe 36 at the center of the lower end of the adsorption shell 32.

[0045] During operation, the pressure difference before and after the adsorption filter element 33 is monitored in real time. When the pressure difference reaches 0.3MPa, it indicates that the filter element is clogged or saturated with adsorption. At this time, the machine is stopped and the quick-opening flange between the adsorption shell 32 and the adsorption cover 31 is opened. The adsorption shell 32 and the pre-installed adsorption filter element 33 can be replaced as a whole without disassembling other parts of the device, which greatly reduces the difficulty of offshore operation and maintenance and downtime. The whole device is fixed on the platform deck by the mounting bracket 37 on the outside of the adsorption cover 31. The rotation impact dehydration component 2 and the adsorption dehydration component 3 are rigidly connected by multiple support rods 4 to ensure structural stability.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. An integrated natural gas purification and dehydration device, comprising a natural gas inlet pipe (1), characterized in that, It also includes a rotary impact dehydration component (2) and an adsorption dehydration component (3). The rotary impact dehydration component (2) is fixed to the top of the adsorption dehydration component (3) by multiple support rods (4). The natural gas inlet pipe (1) is fixedly inserted into the top of the rotary impact dehydration component (2). The rotating impact dehydration assembly (2) includes an installation cylinder (21), in which a dehydration cone (22) is rotatably sleeved. The inner diameter of the upper end of the dehydration cone (22) is larger than that of the lower end. One end of the natural gas inlet pipe (1) located inside the installation cylinder (21) is fixedly connected to a distribution shell (23). Multiple acceleration nozzles (24) are uniformly fixedly connected to the side wall of the distribution shell (23). The spray direction of the acceleration nozzles (24) is perpendicular to the inner wall of the dehydration cone (22). A motor rotating assembly (25) for driving the dehydration cone (22) to rotate is fixed to the inner wall of the installation cylinder (21).

2. The integrated natural gas purification and dehydration device according to claim 1, characterized in that, The bottom of the dehydration cone (22) is integrally connected to an air outlet (26). The lower end of the air outlet (26) passes through the lower end of the mounting cylinder (21) and extends into the adsorption dehydration assembly (3). A water storage ring groove (27) is formed between the top of the air outlet (26) and the bottom of the dehydration cone (22). The side wall of the dehydration cone (22) corresponding to the water storage ring groove (27) is provided with multiple centrifugal drainage holes (28). A drainage ring groove (29) is provided between the outer side of the dehydration cone (22) and the mounting cylinder (21) at the position corresponding to the centrifugal drainage holes (28). The side wall of the mounting cylinder (21) corresponding to the drainage ring groove (29) is connected to multiple drainage pipes (210).

3. The integrated natural gas purification and dehydration device according to claim 2, characterized in that, The inner wall of the dehydration cone (22) is uniformly fixed with a plurality of partition ribs (211) along the circumference, and the plurality of partition ribs (211) divide the interior of the dehydration cone (22) into a plurality of independent fan-shaped impact chambers.

4. The integrated natural gas purification and dehydration device according to claim 2, characterized in that, The upper outer side of the air outlet (26) is inclined outward, so that the upper opening width of the water storage ring groove (27) is smaller than the lower opening width, forming an inverted trapezoidal cross section.

5. The integrated natural gas purification and dehydration device according to claim 2, characterized in that, The inner diameter of the air outlet (26) gradually decreases from top to bottom, forming a gradually narrowing flow channel, and the necking ratio is 1.2 to 1.5:

1.

6. The integrated natural gas purification and dehydration device according to claim 1, characterized in that, The adsorption dehydration assembly (3) includes an adsorption round cover (31) rotatably sleeved on the outside of the bottom of the air outlet cylinder (26). The lower end of the adsorption round cover (31) is detachably fixed with an adsorption round shell (32). A cylindrical adsorption filter element (33) is fixed inside the adsorption round shell (32). One end of the air outlet cylinder (26) located inside the adsorption round cover (31) is fixedly connected to a distribution pipe (34). Multiple distribution heads (35) facing the adsorption filter element (33) are uniformly fixedly connected to the lower surface of the distribution pipe (34). An exhaust pipe (36) is fixedly connected to the lower end of the adsorption round shell (32). An installation bracket (37) is fixedly fixed to the outside of the adsorption round cover (31).

7. The integrated natural gas purification and dehydration device according to claim 6, characterized in that, The adsorption filter element (33) is a coalescing-adsorption composite filter element, which includes, from the inside out, a glass fiber coalescing layer, an activated alumina adsorption layer and a molecular sieve deep adsorption layer.

8. The integrated natural gas purification and dehydration device according to claim 6, characterized in that, The adsorption shell (32) and the adsorption cover (31) are connected by a quick-opening flange, and a sealing gasket is provided at the quick-opening flange.

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