Molecular sieve dehydrating tower device for coal bed gas liquefaction

Abstract

The invention discloses a molecular sieve dehydration tower device for coal bed gas liquefaction, and particularly relates to the technical field of molecular sieve dehydration, the molecular sieve dehydration tower device comprises a dehydration tank, a molecular sieve pore plate, a main pipe, a plurality of branch pipes and a spacing cover, the molecular sieve pore plate for adsorption dehydration is mounted in the dehydration tank; the main pipe is arranged below the molecular sieve pore plate, and the outer wall of the main pipe is fixedly communicated with a plurality of branch pipes; the spacing cover is arranged outside the main pipe and close to the top end of the main pipe. Multi-stage shunting interval protection is achieved through the main protection piece, the auxiliary protection piece and the top protection piece, a multi-stage shunting and buffering protection mechanism is automatically started, high-pressure and high-speed airflow is effectively prevented from directly impacting the molecular sieve pore plate, deformation or pulverization of the molecular sieve pore plate due to impact is prevented, the durability of molecular sieve adsorption dehydration is greatly improved, and the service life of the molecular sieve is prolonged. Therefore, the problem that self-protection treatment on the molecular sieve is difficult to realize, so that the adsorption durability of the molecular sieve is relatively poor is solved.

Description

Technical Field

[0001] This invention relates to the field of molecular sieve dehydration technology, and more specifically, to a molecular sieve dehydration tower device for coalbed methane liquefaction. Background Technology

[0002] The molecular sieve dehydration tower device for coalbed methane liquefaction is one of the core equipment in coalbed methane liquefaction. Its main function is to remove moisture from coalbed methane through the adsorption of molecular sieves, thereby achieving gas-liquid separation and ensuring the stability of the liquefaction process and product quality.

[0003] Among the existing publicly available documents, patent publication number CN116371133A discloses a three-tower dehydration and regeneration device for molecular sieves in natural gas ethane recovery. This technology determines the switching of molecular sieve towers based on step sequence values, performs tower switching operations, repeats the next switching cycle, or triggers an alarm and interrupts the process. This invention meets measurement requirements in terms of accuracy and can achieve deep dehydration of ethane based on adsorption effects without human intervention. However, this technology still has the following problems.

[0004] When molecular sieve adsorption is used for dehydration in coalbed methane liquefaction, there are obvious problems. When the pressure and flow rate of the coalbed methane liquefaction increases, directly opening the high-pressure coalbed methane liquefaction body will cause the moist water inside the coalbed methane liquefaction body to directly impact the molecular sieve adsorption surface. This will cause deformation of the adsorption surface and premature pulverization and damage of the molecular sieve due to the impact. It is difficult to automatically adjust and process the coalbed methane liquefaction body according to actual use needs, and it is difficult to achieve self-protection of the molecular sieve, resulting in poor durability of molecular sieve adsorption. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solution: a molecular sieve dehydration tower device for coalbed methane liquefaction, comprising a dehydration tank, wherein a molecular sieve perforated plate for adsorption and dehydration is installed inside the dehydration tank; The main tube is located below the molecular sieve pore plate, and multiple branch tubes are fixedly connected to the outer wall of the main tube; A spacer cover is installed outside the main tube and near its top. A sealing ring is provided below the spacer cover, and a main protective component is provided on the outer wall of the spacer cover. A secondary protective component is installed on the outer wall of the sealing ring, and the secondary protective component is provided with a slanted shroud. A top protective component is installed on the top of the outer wall of the secondary protective component, and a V-shaped plate and a sealing plate are installed on the top protective component; The testing component is installed at the bottom of the main pipe; When the pressure of the coalbed methane liquefaction material detected by the detection device exceeds the set pressure value, the main protection device drives the sealing ring and the spacer to move down synchronously to divert and protect the overpressure coalbed methane liquefaction material inside the main pipe. At the same time, the sealing ring drives the secondary protective component to move, which in turn drives the inclined diaphragm to divert and protect the overpressure coalbed gas liquefaction inside the branch pipe. At the same time, the auxiliary protective component drives the top protective component to operate, and the top protective component drives the V-shaped plate to provide diversion interval protection for the top of the branch pipe, and drives the baffle plate to provide diversion interval protection for the top of the main pipe.

[0006] In a preferred embodiment, a gap is provided between the inner wall of the spacer and the outer wall of the main pipe, and a gap is provided between the inner wall of the inclined spacer and the outer wall of the branch pipe.

[0007] In a preferred embodiment, the main protective component includes: Multiple support bars are fixedly connected to the outer wall of the spacer cover. The support bars are fixedly connected to the sealing ring. Guide rings are fixed on both the upper and lower surfaces of the spacer cover, and the length of the spacer cover is greater than the length of the sealing ring. Multiple pressure distribution holes are all located on the inner wall of the main pipe; An explosion-proof electric cylinder is installed between two branch pipes. The outer wall of the explosion-proof electric cylinder is fixedly connected to the main pipe. A movable block is fixedly connected to the retracted end of the explosion-proof electric cylinder, and the movable block is fixedly connected to the sealing ring.

[0008] In a preferred embodiment, the two guide rings are symmetrically arranged about the spacer cover, and the inner wall diameter of the spacer cover is larger than the inner wall diameter of the sealing ring.

[0009] In a preferred embodiment, the secondary protective element includes: An oblique strip is fixedly connected to the outer wall of the sealing ring, and a pressure groove frame is fixed at the bottom end of the oblique strip; A sliding shaft slides against the inner wall of a pressure groove frame, and the pressure groove frame is used to press the sliding shaft. A sealing sleeve is fixedly installed at one end of the sliding shaft. The sealing sleeve is slidably connected to the branch pipe. Multiple linkage bars are fixed on the outer wall of the sealing sleeve above the sliding shaft. The inclined diaphragm is fixedly connected to the linkage bars. Multiple side-drain holes are all located on the inner wall of the branch pipe.

[0010] In a preferred embodiment, the pressure groove frame and the sealing sleeve are slidably connected, and both the inclined diaphragm and the sealing sleeve are inclined.

[0011] In a preferred embodiment, the inner wall diameter of the inclined diaphragm is larger than the inner wall diameter of the sealing sleeve.

[0012] In a preferred embodiment, the top protective member includes; The bottom end of the traction rope is fixed to the top of the outer wall of the sliding shaft, and the top of the traction rope is provided with a pull shaft. Both the traction rope and the V-shaped plate are fixedly connected to the pull shaft. A socket block is fixed to the upper surface of a V-shaped plate. The inner wall of the socket block is provided with a protruding rod, which is fixedly connected to the dehydration tank. The protruding rod is used to guide the sliding of the socket block. An arc-shaped strip is installed on the upper surface of the sealing plate, wherein both the V-shaped plate and the sealing plate are fixedly connected to the arc-shaped strip, and the upper surfaces of the V-shaped plate and the upper surfaces of the sealing plate are arranged parallel to each other. An elastic rope is located on one side of the protruding rod. The dehydration tank and the V-shaped plate are both fixedly connected to the elastic rope, which is used to provide elasticity to the V-shaped plate.

[0013] In a preferred embodiment, a guide sleeve is slidably connected to the outer wall of the traction rope, and a support rod is fixed to one side of the guide sleeve, the support rod being fixedly connected to the dehydration tank.

[0014] In a preferred embodiment, the detection element includes: An electric valve is connected to the bottom of the main pipe. One end of the electric valve is threaded to an inlet pipe. A pressure sensor is inserted into the outer wall of the inlet pipe. A controller is provided on the outer wall of the dehydration tank. The electric valve and the pressure sensor are electrically connected to the controller. The explosion-proof electric cylinder is electrically connected to the controller. An air outlet pipe is connected to the outer wall of the dehydration tank near its top.

[0015] The technical effects and advantages of the present invention.

[0016] This invention utilizes the synergistic effect of the main protective component, the secondary protective component, and the top protective component to automatically activate a multi-stage diversion and buffer protection mechanism when overpressure of coalbed methane liquefaction is detected. This effectively prevents high-pressure and high-speed airflow from directly impacting the molecular sieve plate, preventing it from deforming or pulverizing due to the impact. This achieves self-protection of the molecular sieve plate, thereby significantly extending the service life of the molecular sieve for adsorption and dehydration.

[0017] This invention combines diversion buffering with edge area protection. When overpressure occurs, the secondary protective component drives the inclined septum to move downward and opens the drain hole on the side of the pipe, converting the vertically upward impacting airflow into a horizontally dispersed airflow, which is buffered within the inclined septum, especially protecting the edge area of ​​the molecular sieve plate and preventing the surrounding molecular sieve from being damaged prematurely due to local impact.

[0018] 3. The present invention uses the V-shaped plate and sealing plate set at the top to work together with the main and secondary protective components to form a three-dimensional buffer network from the center to the edge and from the side to the top. This ensures that the overpressure humid airflow is fully dispersed and slowed down before contacting the molecular sieve adsorption, thereby achieving all-round automatic protection of the molecular sieve pore plate and improving the adaptability and reliability of the system under high pressure and unstable working conditions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the molecular sieve dehydration tower device for coalbed methane liquefaction according to the present invention.

[0020] Figure 2 This is a schematic diagram of the vertical cross-section of the molecular sieve dehydration tower device for coalbed methane liquefaction according to the present invention.

[0021] Figure 3 This is a partial structural diagram of the vertical cross-section of the spacer cover and sealing ring of the present invention.

[0022] Figure 4 This is a partial structural diagram of the vertical cross-section at the connection between the explosion-proof electric cylinder and the moving block of the present invention.

[0023] Figure 5 This is a schematic diagram of a partial section of the structure at the connection between the oblique strip and the sealing ring of the present invention.

[0024] Figure 6 This is a partial structural diagram of the vertical cross-section at the connection between the main pipe and the branch pipe of the present invention.

[0025] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0026] Figure 8 This is a partial structural diagram of the vertical cross-section at the connection between the sliding shaft and the traction rope of the present invention.

[0027] Figure 9 This is a partial structural diagram of the connection between the traction rope and the pull shaft of the present invention, viewed from below.

[0028] The attached diagram is labeled as follows: 1. Dehydration tank; 2. Molecular sieve perforated plate; 3. Main pipe; 4. Branch pipe; 5. Spacer cover; 6. Inclined diaphragm cover; 7. V-shaped plate; 8. Sealing plate; 9. Sealing ring; 10. Explosion-proof electric cylinder; 11. Moving block; 12. Support bar; 13. Guide ring; 14. Pressure dividing hole; 15. Inclined bar; 16. Pressure groove frame; 17. Sliding shaft; 18. Sealing sleeve; 19. Linkage bar; 20. Side drain hole; 21. Traction rope; 22. Pull shaft; 23. Sleeve block; 24. Protruding rod; 25. Arc-shaped bar; 26. Elastic rope; 27. Guide sleeve; 28. Support rod; 29. ​​Electric valve; 30. Inlet pipe; 31. Pressure sensor; 32. Controller; 33. Outlet pipe. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0031] In this embodiment, as Figure 1 - Figure 3 The illustrated molecular sieve dehydration tower device for coalbed methane liquefaction includes a dehydration tank 1, with a molecular sieve perforated plate 2 for adsorption and dehydration installed inside the dehydration tank 1; a main pipe 3, located below the molecular sieve perforated plate 2, with multiple branch pipes 4 fixedly connected to the outer wall of the main pipe 3; a spacer cover 5, located outside the main pipe 3 near its top, with a sealing ring 9 below the spacer cover 5 and a main protective component on the outer wall of the spacer cover 5; a secondary protective component, installed on the outer wall of the sealing ring 9, with an inclined diaphragm 6 on the secondary protective component; a top protective component, installed at the top of the outer wall of the secondary protective component, with a V-shaped plate 7 and a sealing baffle 8 installed on the top protective component; and a detection component, installed at the bottom end of the main pipe 3. A gap is provided between the inner wall of the spacer cover 5 and the outer wall of the main pipe 3, and a gap is provided between the inner wall of the inclined diaphragm 6 and the outer wall of the branch pipes 4.

[0032] The operating principle of this embodiment is as follows: when the pressure of the coalbed methane liquefied gas exceeds a set pressure value, the main protective component drives the sealing ring 9 and the spacer 5 to move down synchronously, providing diversion and isolation protection for the overpressured coalbed methane liquefied gas inside the main pipe 3. At the same time, the sealing ring 9 drives the auxiliary protective component, which in turn drives the inclined spacer 6 to provide diversion and isolation protection for the overpressured coalbed methane liquefied gas inside the branch pipe 4. Simultaneously, the auxiliary protective component drives the top protective component, which in turn drives the V-shaped plate 7 to provide diversion and isolation protection for the top of the branch pipe 4, and drives the baffle plate 8 to provide diversion and isolation protection for the top of the main pipe 3. In this way, when the main pipe 3 and multiple branch pipes 4 transport overpressured coalbed methane liquefied gas into the dehydration tank 1, they can provide large-area simultaneous diversion and isolation protection at different positions below the molecular sieve perforated plate 2. According to actual usage requirements, the overpressured coalbed methane liquefied gas is automatically adjusted and treated to avoid direct diversion and impact damage to the molecular sieve perforated plate 2, thus achieving self-protection of the molecular sieve perforated plate 2 and significantly improving the durability of molecular sieve adsorption. Example

[0033] In this embodiment, as Figure 3 - Figure 7 As shown, the main protective component includes: multiple support bars 12, all fixedly connected to the outer wall of the spacer 5, with the support bars 12 fixedly connected to the sealing ring 9; guide rings 13 fixed to both the upper and lower surfaces of the spacer 5, and the length of the spacer 5 being greater than the length of the sealing ring 9; multiple pressure-distributing holes 14, all opened on the inner wall of the main pipe 3; and an explosion-proof electric cylinder 10, installed between two of the branch pipes 4, with the outer wall of the explosion-proof electric cylinder 10 fixedly connected to the main pipe 3, and a moving block 11 fixedly connected to the retracted end of the explosion-proof electric cylinder 10, with the moving block 11 fixedly connected to the sealing ring 9. The two guide rings 13 are symmetrically arranged about the spacer 5, and the inner diameter of the spacer 5 is greater than the inner diameter of the sealing ring 9.

[0034] The operating principle of this embodiment is as follows: when the pressure of the coalbed methane liquefaction exceeds the set pressure value, the explosion-proof electric cylinder 10 is activated by the controller 32. The retracting end of the explosion-proof electric cylinder 10 drives the moving block 11 to move downward. The moving block 11 drives the sealing ring 9 to move downward, opening multiple pressure-distributing holes 14. At the same time, the sealing ring 9 drives multiple support bars 12 to move downward. The support bars 12 drive the spacer cover 5 to move downward. The spacer cover 5 drives the two guide rings 13 to move downward synchronously. The spacer cover 5 begins to move outward from the pressure-distributing holes 14, so that the spacer cover 5 is located outside the pressure-distributing holes 14, and there is a gap between the inner wall of the spacer cover 5 and the outer wall of the main pipe 3. When the overpressure coalbed methane liquefaction inside the main pipe 3 begins to dissipate from the inside of the main pipe 3... The gas flows into multiple pressure-distributing holes 14, where it disperses pressure outwards. These holes impact the liquefied coalbed methane against the inner walls of the spacer 5 and guide ring 13, providing buffering protection and preventing direct impact on the middle of the lower surface adsorption surface of the molecular sieve plate 2. Simultaneously, the impact disperses the liquefied coalbed methane, allowing it to flow upwards into the molecular sieve plate 2 for contact adsorption of water, thus achieving dehydration. This diversion and spacing protection of the liquefied coalbed methane inside the pipe 4 prevents deformation of the lower surface adsorption surface of the molecular sieve plate 2, avoids premature pulverization and damage of the molecular sieve due to impact, and makes the molecular sieve plate 2 more durable. Example

[0035] In this embodiment, as Figure 4 - Figure 7 As shown, the secondary protective components include: a diagonal strip 15, fixedly connected to the outer wall of the sealing ring 9, with a pressure groove frame 16 fixed to the bottom end of the diagonal strip 15; a sliding shaft 17, sliding on the inner wall of the pressure groove frame 16, with the pressure groove frame 16 used to compress the sliding shaft 17; a sealing sleeve 18, fixedly installed at one end of the sliding shaft 17, slidably connected to the branch pipe 4, with multiple linkage strips 19 fixed to the outer wall of the sealing sleeve 18 and above the sliding shaft 17, and the diagonal diaphragm 6 fixedly connected to the linkage strips 19; and multiple side drainage holes 20, all opened on the inner wall of the branch pipe 4. The pressure groove frame 16 is slidably connected to the sealing sleeve 18, and both the diagonal diaphragm 6 and the sealing sleeve 18 are inclined. The inner diameter of the diagonal diaphragm 6 is larger than the inner diameter of the sealing sleeve 18.

[0036] The operating principle of this embodiment is as follows: When the sealing ring 9 moves downward, it drives multiple inclined strips 15 to move downward simultaneously. These inclined strips 15 then cause multiple pressure groove frames 16 to move downward simultaneously. The pressure groove frames 16 begin to press against the sliding shaft 17, which slides along the inner wall of the pressure groove frame 16. Simultaneously, the sliding shaft 17 drives the sealing sleeve 18 to tilt downward along the outer wall of the branch pipe 4, thus opening multiple side drainage holes 20. At the same time, the sealing sleeve 18 drives the linkage strip 19 to tilt downward, and the linkage strip 19 causes the inclined partition 6 to tilt downward, positioning it outside the side drainage holes 20. There is a gap between the inner wall of pipe 6 and the outer wall of pipe 4. When the overpressure coalbed methane liquefaction is generated, it will flow into multiple pipes 4 through the inside of the main pipe 3. After passing through multiple side outlet holes 20 inside the pipe 4, it will be sprayed into the inner wall of the inclined diaphragm 6 for interval buffer protection. This achieves the diversion and interval protection of the overpressure coalbed methane liquefaction inside the pipe 4, avoiding direct impact of the overpressure coalbed methane liquefaction on the lower edge of the molecular sieve plate 2. This avoids deformation of the adsorption surface of the molecular sieve plate 2 and prevents the molecular sieve from being prematurely pulverized and damaged due to impact, making the molecular sieve plate 2 more durable. Example

[0037] In this embodiment, as Figure 8 - Figure 9 As shown, the top protective component includes: a traction rope 21 with its bottom end fixed to the top of the outer wall of the sliding shaft 17, a pull shaft 22 provided at the top of the traction rope 21, and the traction rope 21 and the V-shaped plate 7 both being fixedly connected to the pull shaft 22; a sleeve block 23 fixed to the upper surface of the V-shaped plate 7, with a protruding rod 24 on the inner wall of the sleeve block 23, the protruding rod 24 being fixedly connected to the dehydration tank 1, and the protruding rod 24 being used to guide the sliding of the sleeve block 23; an arc-shaped strip 25 installed on the upper surface of the sealing plate 8, with one of the V-shaped plates 7 and the sealing plate 8 both being fixedly connected to the arc-shaped strip 25, and the upper surface of the V-shaped plate 7 being parallel to the upper surface of the sealing plate 8; and an elastic rope 26 located on one side of the protruding rod 24, with the dehydration tank 1 and the V-shaped plate 7 both being fixedly connected to the elastic rope 26, and the elastic rope 26 being used to provide elasticity to the V-shaped plate 7. The outer wall of the traction rope 21 is slidably connected to a guide sleeve 27, and a support rod 28 is fixed on one side of the guide sleeve 27. The support rod 28 is fixedly connected to the dehydration tank 1.

[0038] The operating principle of this embodiment is as follows: when the sliding shaft 17 tilts downward, it causes the bottom end of the traction rope 21 to move downward. Simultaneously, the traction rope 21 moves along the inner wall of the guide sleeve 27. At the same time, the dehydration tank 1 supports the support rod 28, which provides stable support to the guide sleeve 27. The traction rope 21 then pulls the pull shaft 22 towards the center point of the main pipe 3. The pull shaft 22 moves the V-shaped plate 7 towards the center point of the main pipe 3. The V-shaped plate 7 moves the connecting block 23 towards the center point of the main pipe 3. The connecting block 23 moves stably along the outer wall of the protruding rod 24. Simultaneously, the V-shaped plate 7 stretches one end of the elastic rope 26, which continuously provides tension to the V-shaped plate 7. Thus, the V-shaped plate 7 begins to move to the top interval area of ​​the branch pipe 4. Simultaneously, one of the V-shaped plates 7 will cause the inclined strip 15 to move to the right, and the inclined strip 15 will cause the sealing plate 8 to move to the right. The sealing plate 8 is located at the top of the main pipe 3. In this way, the overpressure coalbed methane liquefied gas inside the main pipe 3 will begin to be sprayed into the inner wall of the sealing plate 8. At the same time, the overpressure coalbed methane liquefied gas inside the branch pipe 4 will be sprayed into the V-shaped space on the inner wall of the V-shaped plate 7. This provides diversion and interval protection for the top of the branch pipe 4, and diversion and interval protection for the top of the main pipe 3 through the sealing plate 8. This prevents the branch pipe 4 and the main pipe 3 from directly spraying the overpressure coalbed methane liquefied gas from the top and damaging the molecular sieve plate 2, prevents the lower surface adsorption surface of the molecular sieve plate 2 from deforming and being damaged, and prevents the lower surface adsorption surface of the molecular sieve plate 2 from prematurely pulverizing, thereby improving the durability of the molecular sieve plate 2. Example

[0039] In this embodiment, as Figure 1 As shown, the detection components include: an electric valve 29, which is connected to the bottom end of the main pipe 3; an inlet pipe 30 is threaded to one end of the electric valve 29; a pressure sensor 31 is inserted into the outer wall of the inlet pipe 30; a controller 32 is provided on the outer wall of the dehydration tank 1; the electric valve 29 and the pressure sensor 31 are both electrically connected to the controller 32; the explosion-proof electric cylinder 10 is electrically connected to the controller 32; and an air outlet pipe 33 is connected to the outer wall of the dehydration tank 1 near its top.

[0040] The operating principle of this embodiment is as follows: When overpressure is detected, one end of the inlet pipe 30 is first connected to the coalbed methane liquefaction pressurization and delivery pipeline, and the outlet pipe 33 is connected to the output pipeline. The pressure sensor 31 can sense the pressure of the coalbed methane liquefied material inside the inlet pipe 30. When the pressure of the coalbed methane liquefied material exceeds the pressure value set by the controller 32, the controller 32 can immediately activate the explosion-proof electric cylinder 10. The retracting end of the explosion-proof electric cylinder 10 drives the moving block 11 to move downward, immediately performing self-protection processing. Later, the controller 32 opens the electric valve 29 to transport the overpressured coalbed methane liquefied material inside the inlet pipe 30 to the main pipe 3, and from the main pipe 3 it enters into multiple branch pipes 4, thus achieving diversion and interval protection for the overpressured coalbed methane liquefied material inside the main pipe 3 and branch pipes 4. After protection processing, the overpressured coalbed methane liquefied material can be dehydrated by flow adsorption through the molecular sieve perforated plate 2.

[0041] During normal pressure detection, the pressure sensor 31 can sense the pressure of the coalbed methane liquefied gas entering the pipe 30. When the pressure of the coalbed methane liquefied gas does not exceed the pressure value set by the controller 32, the controller 32 does not need to start the explosion-proof electric cylinder 10. In this way, the controller 32 opens the electric valve 29 to transport the atmospheric pressure coalbed methane liquefied gas entering the pipe 30 to the main pipe 3. At the same time, the sealing ring 9 seals the pressure distribution hole 14, and the gas is discharged directly from the top of the main pipe 3 into the lower surface of the molecular sieve plate 2 for direct and rapid contact adsorption and dehydration. Meanwhile, the main pipe 3 transports the atmospheric pressure coalbed methane liquefied gas to multiple branch pipes 4. Since the sealing sleeve 18 seals the multiple side discharge holes 20, the gas is discharged directly from the top of the branch pipe 4 into the lower surface of the molecular sieve plate 2 for direct and rapid contact adsorption and dehydration. In this way, the atmospheric pressure coalbed methane liquefied gas can quickly contact the lower surface of the molecular sieve plate 2, and the dehydrated atmospheric pressure coalbed methane liquefied gas is discharged along the gas outlet pipe 33.

[0042] The above description is merely 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. A molecular sieve dehydration tower device for coalbed methane liquefaction, comprising a dehydration tank (1), characterized in that: The dehydration tank (1) is equipped with a molecular sieve plate (2) for adsorption and dehydration. The main pipe (3) is located below the molecular sieve plate (2), and the outer wall of the main pipe (3) is fixedly connected with multiple branch pipes (4). A spacer cover (5) is provided outside the main tube (3) and near its top. A sealing ring (9) is provided below the spacer cover (5), and a main protective component is provided on the outer wall of the spacer cover (5). A secondary protective component is installed on the outer wall of the sealing ring (9), and the secondary protective component is provided with a slanted diaphragm (6). A top protective component is installed on the top of the outer wall of the sub-protective component, and a V-shaped plate (7) and a sealing plate (8) are installed on the top protective component. The testing component is installed at the bottom of the main pipe (3); When the pressure of the coalbed methane liquefaction exceeds the set pressure value by the detection device, the sealing ring (9) and the spacer (5) are driven to move down synchronously by the main protection device to divert and protect the overpressure coalbed methane liquefaction inside the main pipe (3). At the same time, the sealing ring (9) drives the auxiliary protective component to move, so that the auxiliary protective component drives the inclined diaphragm (6) to divert and protect the overpressure coalbed gas liquefaction inside the branch pipe (4); At the same time, the auxiliary protection component drives the top protection component to operate, and the top protection component drives the V-shaped plate (7) to perform diversion interval protection on the top of the branch pipe (4), and drives the sealing plate (8) to perform diversion interval protection on the top of the main pipe (3).

2. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 1, characterized in that: The inner wall of the partition cover (5) is provided with a gap between the inner wall of the main pipe (3) and the outer wall of the oblique partition cover (6) is provided with a gap between the inner wall of the oblique partition cover (6) and the outer wall of the branch pipe (4).

3. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 2, characterized in that: The main protective component includes: Multiple support bars (12) are fixedly connected to the outer wall of the spacer cover (5). The support bars (12) are fixedly connected to the sealing ring (9). Guide rings (13) are fixed on the upper and lower surfaces of the spacer cover (5). The length of the spacer cover (5) is greater than the length of the sealing ring (9). Multiple pressure distribution holes (14) are all opened on the inner wall of the main pipe (3); An explosion-proof electric cylinder (10) is installed between two branch pipes (4). The outer wall of the explosion-proof electric cylinder (10) is fixedly connected to the main pipe (3). A moving block (11) is fixedly connected to the retracted end of the explosion-proof electric cylinder (10), and the moving block (11) is fixedly connected to the sealing ring (9).

4. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 3, characterized in that: The two guide rings (13) are symmetrically arranged about the spacer cover (5), and the inner wall diameter of the spacer cover (5) is greater than the inner wall diameter of the sealing ring (9).

5. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 4, characterized in that: The secondary protective component includes: An oblique strip (15) is fixedly connected to the outer wall of the sealing ring (9), and a pressure groove frame (16) is fixed at the bottom end of the oblique strip (15). The sliding shaft (17) slides on the inner wall of the pressure groove frame (16), and the pressure groove frame (16) is used to press the sliding shaft (17). A sealing sleeve (18) is fixedly installed at one end of a sliding shaft (17). The sealing sleeve (18) is slidably connected to the branch pipe (4). Multiple linkage bars (19) are fixed on the outer wall of the sealing sleeve (18) and above the sliding shaft (17). The inclined diaphragm (6) is fixedly connected to the linkage bars (19). Multiple side holes (20) are opened on the inner wall of the branch pipe (4).

6. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 5, characterized in that: The pressure groove frame (16) and the sealing sleeve (18) are slidably connected, and both the inclined diaphragm (6) and the sealing sleeve (18) are inclined.

7. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 6, characterized in that: The inner diameter of the oblique diaphragm (6) is larger than the inner diameter of the sealing sleeve (18).

8. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 7, characterized in that: The top protective component includes: The bottom end of the traction rope (21) is fixed to the top of the outer wall of the sliding shaft (17). The top end of the traction rope (21) is provided with a pull shaft (22). The traction rope (21) and the V-shaped plate (7) are both fixedly connected to the pull shaft (22). A socket block (23) is fixed to the upper surface of a V-shaped plate (7). The inner wall of the socket block (23) is provided with a protruding rod (24). The protruding rod (24) is fixedly connected to the dehydration tank (1). The protruding rod (24) is used to guide the socket block (23) to slide. An arc-shaped strip (25) is installed on the upper surface of the sealing plate (8), wherein one of the V-shaped plates (7) and the sealing plate (8) are fixedly connected to the arc-shaped strip (25), and the upper surface of the V-shaped plate (7) and the upper surface of the sealing plate (8) are arranged parallel to each other. Elastic rope (26) is located on one side of the protruding rod (24). The dehydration tank (1) and the V-shaped plate (7) are both fixedly connected to the elastic rope (26). The elastic rope (26) is used to provide elasticity to the V-shaped plate (7).

9. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 8, characterized in that: The outer wall of the traction rope (21) is slidably connected to a guide sleeve (27), and a support rod (28) is fixed on one side of the guide sleeve (27). The support rod (28) is fixedly connected to the dehydration tank (1).

10. The molecular sieve dehydration tower device for coalbed methane liquefaction according to claim 9, characterized in that: The detection component includes: An electric valve (29) is connected to the bottom of the main pipe (3). One end of the electric valve (29) is threadedly connected to an inlet pipe (30). A pressure sensor (31) is inserted into the outer wall of the inlet pipe (30). A controller (32) is provided on the outer wall of the dehydration tank (1). The electric valve (29) and the pressure sensor (31) are both electrically connected to the controller (32). The explosion-proof electric cylinder (10) is electrically connected to the controller (32). An air outlet pipe (33) is connected to the outer wall of the dehydration tank (1) near its top.

Images