Multilayer composite adsorption device for natural gas dehydration

Abstract

The utility model discloses a multilayer composite adsorption device for natural gas dehydration relates to natural gas dehydration technical field, including the air inlet pipe, the air inlet pipe one side is provided with the air outlet pipe, is provided with two processing assemblies between the air inlet pipe and air outlet pipe, the air inlet pipe and air outlet pipe are all three -way pipeline and two ends are fixedly connected with the air inlet end and the air outlet end of adjacent processing assembly respectively. The utility model discloses the processing assembly of setting, through the collocation of two processing assemblies, can guarantee that another processing assembly can be cleaned and replaced in the non -stop, thereby guaranteeing that the natural gas dehydration process can be carried out continuously and uninterruptedly, and simultaneously through the dehydration assembly of setting, adopt the collaborative working mechanism of step -by -step filtration, and the device is superior to traditional scheme in dehydration depth, operating stability and economy through the layered design of dehydration assembly.

Description

Technical Field

[0001] This utility model relates to the field of natural gas dehydration technology, specifically to a multilayer composite adsorption device for natural gas dehydration. Background Technology

[0002] Currently, natural gas dehydration is a key step in the natural gas pretreatment process, directly affecting pipeline transportation safety and subsequent processing efficiency. The adsorption dehydration devices widely used in industry still have the following significant technical defects in actual operation. Although there have been improved schemes using double-layer adsorbents in recent years, the lack of a staged flow channel design still makes it impossible to solve the efficiency and energy consumption problems simultaneously.

[0003] The problems include: 1. Existing adsorption towers mostly adopt a simple straight-through structure, which easily forms a "channeling effect" after natural gas enters from the top, such as uneven flow field: computational fluid dynamics simulation shows that the airflow velocity deviation in traditional towers can reach ±25%, causing premature penetration of the adsorbent in local areas, as well as large fluctuations in dehydration rate, with the outlet water dew point fluctuating by more than 15%, which seriously affects the operation of downstream equipment; 2. Single-layer adsorption structure has low efficiency. Traditional dehydration towers mostly use a single adsorbent, which has a limited adsorption capacity. Under the condition of high water content in natural gas, the single-layer adsorbent needs to be switched and regenerated every 8-12 hours due to the rapid saturation rate.

[0004] Based on this, a multilayer composite adsorption device for natural gas dehydration is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a multilayer composite adsorption device for natural gas dehydration, so as to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-layer composite adsorption device for natural gas dehydration includes an inlet pipe, an outlet pipe on one side of the inlet pipe, and two processing components between the inlet pipe and the outlet pipe.

[0008] Both the inlet pipe and the outlet pipe are tee pipes and their two ends are fixedly connected to the inlet and outlet ends of the adjacent processing components, respectively.

[0009] The processing component includes an adsorption tube, an air inlet end of which is fixedly connected to a solenoid valve, an air outlet end of which is fixedly connected to a check valve, a dehydration component in the middle of the adsorption tube, and a mixing component between the solenoid valve and the dehydration component.

[0010] Both the inlet pipe and the outlet pipe are equipped with a connecting flange at the other end, and are connected to external equipment through the connecting flange.

[0011] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0012] In one alternative: the dehydration assembly includes an adsorption box, a sealing door is hinged to one side of the adsorption box, a sealing silicone is provided on one side of the sealing door, and three sliding grooves are arrayed inside the adsorption box, with an adsorption plate slidably disposed inside each sliding groove.

[0013] In one alternative: the inner sides of the three adsorption plates are sequentially provided with a coarse dehydration layer, a fine dehydration layer and a protective layer, and the interlayer spacing ratio between each adsorption plate is 1:1.5:0.5.

[0014] In one alternative embodiment: the mixing component includes a fixed rod, which is fixedly connected to the inside of the adsorption tube, and a rotating rod is rotatably connected to the middle of the fixed rod, with a plurality of curved stirring blades arranged in an array on the rotating rod.

[0015] In one alternative: all the curved stirring blades are evenly distributed along the longitudinal direction of the rotating rod, and adjacent curved stirring blades are arranged at a 30° angle interval.

[0016] In one alternative embodiment: the coarse dehydration layer is an activated alumina layer, wherein the activated alumina particle size is 3-5 mm and the bulk density is 0.7 g / cm³. 3 .

[0017] In one alternative embodiment: the precision dehydration layer is a 4A molecular sieve, wherein the 4A molecular particle size is 1.5-2 mm and the bulk density is 0.6 g / cm³. 3 .

[0018] In one alternative: the protective layer is a silicone layer with a particle size of 2-3 mm.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention, through the arrangement of two processing components, allows for the cleaning and replacement of the other component without shutting down the system, thus ensuring continuous and uninterrupted natural gas dehydration. Furthermore, the dehydration components employ a staged filtration mechanism, and the layered design of the dehydration components significantly outperforms traditional solutions in terms of dehydration depth, operational stability, and economy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the processing component structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the hybrid component structure of this utility model.

[0024] Figure 4 This is a schematic diagram of the dehydration component structure of this utility model.

[0025] Figure reference numerals: 1. Inlet pipe; 2. Outlet pipe; 3. Connecting flange; 4. Adsorption pipe; 5. Adsorption box; 6. Sealing door; 7. Solenoid valve; 8. Check valve; 9. Fixed rod; 10. Rotating rod; 11. Curved stirring blade; 12. Slide groove; 13. Adsorption plate; 14. Coarse dehydration layer; 15. Precision dehydration layer; 16. Protective layer; 17. Sealing silicone. Detailed Implementation

[0026] 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 and embodiments.

[0027] In one embodiment, such as Figures 1-4 As shown, a multi-layer composite adsorption device for natural gas dehydration includes an inlet pipe 1, an outlet pipe 2 on one side of the inlet pipe 1, and two processing components between the inlet pipe 1 and the outlet pipe 2.

[0028] Both the air inlet pipe 1 and the air outlet pipe 2 are three-way pipes, and their two ends are fixedly connected to the air inlet and air outlet of the adjacent processing components, respectively.

[0029] The processing component includes an adsorption tube 4, an air inlet end of which is fixedly connected to a solenoid valve 7, an air outlet end of which is fixedly connected to a check valve 8, a dehydration component in the middle of the adsorption tube 4, and a mixing component between the solenoid valve 7 and the dehydration component.

[0030] The other end of the air inlet pipe 1 and the air outlet pipe 2 are each provided with a connecting flange 3 and are connected to external equipment through the connecting flange 3.

[0031] In this embodiment, natural gas is allowed to enter the adsorption tube 4 on one side by opening the solenoid valve 7. When the natural gas enters the adsorption tube 4, it is then evenly dispersed by the mixing component and then processed by the dehydration component. Finally, it is sent out through the gas outlet pipe 2. After the dehydration component on one side is saturated, the other processing component is switched to be used by switching the two solenoid valves 7 between closing and opening. At this time, the saturated processing component can be replaced.

[0032] In one embodiment, such as Figure 4As shown, the dehydration assembly includes an adsorption box 5, a sealing door 6 is hinged to one side of the adsorption box 5, and a sealing silicone 17 is provided on one side of the sealing door 6. Three sliding grooves 12 are arrayed inside the adsorption box 5, and an adsorption plate 13 is slidably arranged inside each sliding groove 12. After the natural gas is dispersed, it is evenly distributed inside the adsorption tube 4, and then the adsorption plate 13 begins to dehydrate it.

[0033] In one embodiment, such as Figure 4 As shown, the inner sides of the three adsorption plates 13 are sequentially provided with a coarse dehydration layer 14, a fine dehydration layer 15 and a protective layer 16, and the interlayer spacing ratio between each adsorption plate 13 is 1:1.5:0.5, which can optimize the airflow resistance distribution.

[0034] In one embodiment, such as Figure 3 As shown, the mixing component includes a fixed rod 9, which is fixedly connected to the inside of the adsorption tube 4. A rotating rod 10 is rotatably connected to the middle of the fixed rod 9. Several curved stirring blades 11 are arranged in an array on the rotating rod 10. When natural gas enters the adsorption tube 4, the natural gas will directly impact the curved stirring blades 11, and then the natural gas will be evenly dispersed to various parts of the adsorption tube 4.

[0035] In one embodiment, such as Figure 3 As shown, all the curved stirring blades 11 are evenly distributed along the longitudinal direction of the rotating rod 10, and adjacent curved stirring blades 11 are arranged at a 30° angle interval to improve the mixing efficiency and dispersion efficiency of natural gas, thereby improving the adsorption efficiency of natural gas.

[0036] In one embodiment, such as Figure 4 As shown, the coarse dehydration layer 14 is an activated alumina layer, wherein the activated alumina particle size is 3-5 mm and the bulk density is 0.7 g / cm³. 3 When processing natural gas with high water content, it preferentially adsorbs about 70%-80% of liquid water and large molecular water vapor.

[0037] In one embodiment, such as Figure 4 As shown, the precision dehydration layer 15 is a 4A molecular sieve, wherein the 4A molecular particle size is 1.5-2 mm and the bulk density is 0.6 g / cm³. 3 This will lower the natural gas water dew point to below -60°C, meeting the standards for long-distance pipelines.

[0038] In one embodiment, such as Figure 4 As shown, the protective layer 16 is a silica gel layer with a particle size of 2-3 mm, used to absorb residual trace amounts of moisture.

[0039] The above embodiments disclose a multi-layer composite adsorption device for natural gas dehydration. Natural gas is introduced into the adsorption tube 4 on one side by opening the solenoid valve 7. Upon entering the adsorption tube 4, the natural gas directly impacts the curved stirring blades 11, which then evenly disperse the natural gas throughout the adsorption tube 4. After being dispersed and evenly distributed within the adsorption tube 4, the natural gas is then dehydrated by the adsorption plate 13. The coarse dehydration layer 14 is an activated alumina layer with a particle size of 3-5 mm and a bulk density of 0.7 g / cm³. 3 When processing natural gas with high water content, it preferentially adsorbs approximately 70%-80% of liquid water and large water vapor molecules. The precision dehydration layer 15 is made of 4A molecular sieve, with 4A molecular particles having a diameter of 1.5-2 mm and a bulk density of 0.6 g / cm³. 3 The natural gas water dew point is reduced to below -60℃ to meet the standards for long-distance pipelines. The protective layer 16 is a silica gel layer with a particle size of 2-3mm, which is used to adsorb residual trace moisture. It is then sent out through the gas outlet pipe 2. After the treatment component on one side is dehydrated and saturated, the other treatment component is switched to use by switching the two solenoid valves 7 to close and open. At this time, the saturated treatment component can be replaced.

[0040] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multilayer composite adsorption device for natural gas dehydration, comprising an inlet pipe (1), an outlet pipe (2) provided on one side of the inlet pipe (1), and two processing components provided between the inlet pipe (1) and the outlet pipe (2); The air inlet pipe (1) and the air outlet pipe (2) are both three-way pipes and their two ends are fixedly connected to the air inlet and air outlet of the adjacent processing components, respectively. Its features are, The processing component includes an adsorption tube (4), an air inlet end of the adsorption tube (4) is fixedly connected to a solenoid valve (7), an air outlet end of the adsorption tube (4) is fixedly connected to a check valve (8), a dehydration component is provided in the middle of the adsorption tube (4), and a mixing component is provided between the solenoid valve (7) and the dehydration component. Both the inlet pipe (1) and the outlet pipe (2) are provided with a connecting flange (3) at the other end and are connected to external equipment through the connecting flange (3).

2. The multilayer composite adsorption device for natural gas dehydration according to claim 1, characterized in that, The dehydration assembly includes an adsorption box (5), a sealing door (6) is hinged to one side of the adsorption box (5), a sealing silicone (17) is provided on one side of the sealing door (6), and three sliding grooves (12) are arrayed on the inner side of the adsorption box (5), and an adsorption plate (13) is slidably provided on the inner side of each sliding groove (12).

3. The multilayer composite adsorption device for natural gas dehydration according to claim 2, characterized in that, The inner sides of the three adsorption plates (13) are provided with a coarse dehydration layer (14), a fine dehydration layer (15) and a protective layer (16) in sequence, and the interlayer spacing ratio between each adsorption plate (13) is 1:1.5:0.

5.

4. The multilayer composite adsorption device for natural gas dehydration according to claim 1, characterized in that, The mixing component includes a fixed rod (9), which is fixedly connected to the inner side of the adsorption tube (4). A rotating rod (10) is rotatably connected to the middle of the fixed rod (9), and a number of curved stirring blades (11) are arranged in an array on the rotating rod (10).

5. The multilayer composite adsorption device for natural gas dehydration according to claim 4, characterized in that, All the curved stirring blades (11) are evenly distributed along the longitudinal direction of the rotating rod (10), and adjacent curved stirring blades (11) are arranged at a 30° angle interval.

6. The multilayer composite adsorption device for natural gas dehydration according to claim 3, characterized in that, The coarse dehydration layer (14) is an activated alumina layer, wherein the activated alumina particle size is 3-5 mm and the bulk density is 0.7 g / cm³. 3 .

7. The multilayer composite adsorption device for natural gas dehydration according to claim 3, characterized in that, The precision dehydration layer (15) is a 4A molecular sieve, wherein the 4A molecular particle size is 1.5-2 mm and the bulk density is 0.6 g / cm³. 3 .

8. The multilayer composite adsorption device for natural gas dehydration according to claim 3, characterized in that, The protective layer (16) is a silicone layer with a particle size of 2-3 mm.

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