A natural gas gathering station dewatering device

Abstract

The utility model relates to a kind of natural gas gathering and transferring station dehydration device, including frame, gas pipe, dehydration tank and replacement mechanism, the frame both sides are inlayed with gas pipe, multiple dehydration tanks are equipped in the frame, the replacement mechanism is installed in frame, for quickly replacing new dehydration tank and two gas pipes connection, with one gas pipe, another gas pipe is communicated with the storage equipment, and dehydration tank and two gas pipes are connected by bolt piece, open hand valve and electric control valve, gas enters dehydration tank and carries out dehydration operation, wherein the surface of dehydration tank is equipped with indicator, new dehydration tank is prompted to replace after reaching threshold, when replacing new dehydration tank, first, old dehydration pipe is separated from two gas pipes, sealing disc is close to two hook claws, and bellows is compressed, wherein the surface of sealing disc two inclined grooves is respectively matched with two hook claws, hook claw one end inclined plane is matched with the inclined plane in inclined groove, and inclined groove extrudes hook claw and rotates in groove body.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas dehydration equipment, specifically a dehydration device for a natural gas gathering and transmission station. Background Technology

[0002] In natural gas gathering and transportation operations, dehydration units are crucial for ensuring that the natural gas water dew point meets standards and preventing pipeline freezing or hydrate formation. Currently, most mainstream natural gas gathering and transportation station dehydration units (such as triethylene glycol dehydration units and molecular sieve dehydration units) adopt a "single-tank or dual-tank alternating operation" structural design. The core issue lies in the dehydration tank replacement process: when the adsorbent (such as molecular sieve) in the dehydration tank fails or the absorbent (such as triethylene glycol) needs to be replaced, the corresponding dehydration unit must be shut down first, the connection between the dehydration tank and the inlet and outlet gas pipes must be disconnected, the old tank must be moved out, the new tank must be hoisted into place, and finally, the pipeline connection and sealing test must be completed again. This replacement process is time-consuming and affects the continuity of gathering and transportation operations, especially at gathering and transportation stations operating under high load.

[0003] For example, the natural gas dehydration device disclosed in the authorized patent document with application number CN202022406379.X dehydrates natural gas by alternately turning on the dehydration units, which facilitates the handling of freezing blockage in the dehydration units caused by natural gas freezing, thereby accelerating the dehydration efficiency and reducing energy consumption. In the above structure, when the adsorbent (such as molecular sieve) in the dehydration tank fails or the absorbent (such as triethylene glycol) needs to be replaced, the replacement process takes a long time. That is, there is the problem mentioned above that the replacement process takes a long time, which affects the continuity of gathering and transportation operations. Therefore, we need to provide a natural gas gathering and transportation station dehydration device. Utility Model Content

[0004] The purpose of this utility model is to provide a dehydration device for a natural gas gathering and transmission station. By setting a replacement mechanism within the frame, the old dehydration tank can be quickly rotated out, and the new dehydration tank can be rotated between two gas pipes. With the two gas pipes and the new dehydration tank sealed together, rapid replacement can be achieved without complex hoisting. The old dehydration tank can be rotated out and the new dehydration tank can be rotated between the two gas pipes simply by the rotation of the ring bracket driven by the support column. Combined with the quick docking structure of the sealing plate and the corrugated pipe, the time for a single replacement is greatly shortened, ensuring the continuity of gathering and transmission operations and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dehydration device for a natural gas gathering and transmission station, comprising:

[0006] The frame includes an air tube, a dehydration tank, and a replacement mechanism. The air tube is embedded in both sides of the frame. Multiple dehydration tanks are provided inside the frame. The replacement mechanism is installed inside the frame and is used to quickly replace the dehydration tank with a new one connected to the two air tubes.

[0007] The replacement mechanism includes a support column and an annular bracket. The support column is rotatably installed inside the frame, and two annular brackets are fixedly installed on the surface of the support column. An installation ring adapted to the annular brackets is fixedly installed on the surface of the dehydration tank.

[0008] Preferably, the annular bracket and the mounting ring are detachably connected by bolts.

[0009] Preferably, a sealing disc is installed on each of the two adjacent sides of the air pipe via a corrugated pipe. The sealing disc is detachably connected to the end plate of the dehydration tank by bolts, and the sealing disc is sealed to the end plate of the dehydration tank.

[0010] Preferably, both sides of the frame are provided with clamping components for auxiliary fixing of the sealing disc. The clamping components include a groove, a spring and a hook. The top and bottom of the air pipe are provided with grooves. The grooves are opened in the frame and hooks are rotatably installed inside. A spring is hinged between the surface of the hook and the inner wall of the groove.

[0011] Preferably, the bottom of the hook claw has a slot, and one side of the hook claw is a bevel.

[0012] Preferably, the top and bottom of the sealing disc are provided with inclined grooves for hook adaptation.

[0013] Preferably, the surface of the trachea is provided with a manual valve and an electrically controlled valve.

[0014] Preferably, a cover is hinged to the top of the frame, and a gas alarm is installed inside the cover.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, by incorporating a replacement mechanism within the frame, allows for the rapid rotation of the old dehydration tank out and the placement of the new dehydration tank between two gas pipes. With the two gas pipes sealingly connected to the new dehydration tank, rapid replacement is achieved without complex hoisting. The old dehydration tank is rotated out and the new tank placed between the two gas pipes simply by the support column driving the ring bracket to rotate. Combined with the quick-connect structure of the sealing disc and corrugated pipe, this significantly reduces the time required for a single replacement, ensuring the continuity of gathering and transportation operations. The multi-tank design, combined with the rotation replacement method, eliminates the need to shut down the entire dehydration unit. The connection of the new tank does not affect natural gas transportation, solving the problem of reduced processing capacity caused by downtime during single or dual-tank alternating operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 This is a three-dimensional bottom view of the structure of this utility model;

[0020] Figure 4 This is a perspective view of the replacement mechanism of this utility model;

[0021] Figure 5 This is a perspective view of the clamping component of this utility model.

[0022] In the diagram: 1. Frame; 2. Gas pipe; 3. Dehydration tank; 4. Replacement mechanism; 41. Support column; 42. Ring bracket; 5. Mounting ring; 6. Sealing disc; 7. Clamping component; 71. Groove; 72. Spring; 73. Hook; 8. Slot; 9. Angled groove; 10. Manual valve; 11. Electric control valve; 12. Cover; 13. Gas alarm; 14. Corrugated pipe. Detailed Implementation

[0023] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a dehydration device for a natural gas gathering and transmission station, comprising:

[0025] The frame 1, air pipes 2, dehydration tanks 3 and replacement mechanism 4 are provided. Air pipes 2 are embedded in both sides of the frame 1. Multiple dehydration tanks 3 are provided inside the frame 1. The replacement mechanism 4 is installed inside the frame 1 and is used to quickly replace the new dehydration tank 3 with the two air pipes 2.

[0026] The replacement mechanism 4 includes a support column 41 and an annular bracket 42. The support column 41 is rotatably installed inside the frame 1. Two annular brackets 42 are fixedly installed on the surface of the support column 41. An installation ring 5 adapted to the annular bracket 42 is fixedly installed on the surface of the dehydration tank 3.

[0027] Specifically, by setting the replacement mechanism 4 inside the frame 1, the old dehydration tank 3 can be quickly rotated out, and the new dehydration tank 3 can be rotated between the two gas pipes 2. As the two gas pipes 2 are sealed and connected to the new dehydration tank 3, rapid replacement can be achieved without complicated hoisting. The old dehydration tank 3 can be rotated out and the new dehydration tank 3 can be rotated between the two gas pipes 2 simply by the support column 41 driving the ring bracket 42 to rotate. Combined with the quick docking structure of the sealing plate 6 and the corrugated pipe 14, the time for a single replacement is greatly shortened, ensuring the continuity of gathering and transportation operations. The design of multiple dehydration tanks 3 combined with the rotation replacement method does not require shutting down the entire dehydration unit. The natural gas transportation is not affected during the docking of the new tank, solving the problem of reduced processing capacity caused by shutdown when a single tank or two tanks are running alternately.

[0028] The annular bracket 42 and the mounting ring 5 are detachably connected by bolts.

[0029] Furthermore, the bolt assembly includes a bolt body and a lock nut. The bolt body passes through the corresponding mounting holes of the annular bracket 42 and the mounting ring 5 in sequence. The lock nut is threadedly connected to the bolt body and fits against the outer wall of the mounting ring 5. The inner wall of the mounting ring 5 is fully welded to the outer wall of the dehydration tank 3, and the outer wall of the mounting ring 5 is provided with a positioning boss that fits against the annular bracket 42. The positioning boss can limit the radial displacement of the dehydration tank 3 on the annular bracket 42, preventing the dehydration tank 3 from shifting during rotation replacement. At the same time, the lock nut can prevent the bolt assembly from loosening during the vibration of the device operation, ensuring the stability of the connection between the dehydration tank 3 and the replacement mechanism 4.

[0030] Both air pipes 2 are fitted with sealing discs 6 on adjacent sides via corrugated pipes 14. The sealing discs 6 are detachably connected to the end plate of the dehydration tank 3 by bolts, and the sealing discs 6 and the end plate of the dehydration tank 3 are sealed together.

[0031] It is worth noting that the bellows 14 is made of stainless steel, and both ends of the bellows 14 are fixed to the end of the air pipe 2 and one side of the sealing plate 6 by welding, respectively. The sealing plate 6 has an annular sealing groove on the side facing the dehydration tank 3, and an oil-resistant rubber sealing gasket is embedded in the sealing groove. The thickness of the sealing gasket is greater than the depth of the sealing groove. When the sealing plate 6 is connected to the end plate of the dehydration tank 3 by bolts, the sealing gasket is squeezed and deformed and fills the gap between the sealing groove and the end plate. Combined with the flexible expansion and contraction characteristics of the bellows 14, it can not only adapt to the slight positional deviation when the dehydration tank 3 rotates and docks, but also improve the sealing performance between the air pipe 2 and the dehydration tank 3, solving the problem that traditional rigid connections are prone to sealing failure due to vibration.

[0032] Both sides of the frame 1 are provided with clamping parts 7 for auxiliary fixing of the sealing plate 6. The clamping parts 7 include a groove 71, a spring 72 and a hook 73. The top and bottom of the air pipe 2 are provided with grooves 71. The grooves 71 are opened inside the frame 1 and the hook 73 is rotatably installed inside. The surface of the hook 73 is hinged to the inner wall of the groove 71 with a spring 72.

[0033] Specifically, the hook 73 is made of high-strength alloy material. The middle part of the hook 73 is rotatably connected to the inner wall of the tank 71 through a pin. The spring 72 is a tension spring. One end of the spring 72 is hinged to the side of the hook 73 away from the slot 8, and the other end is hinged to the side of the inner wall of the tank 71 near the air pipe 2. When the sealing disc 6 moves towards the air pipe 2, the inclined groove 9 of the sealing disc 6 presses against the inclined surface of the hook 73, causing the hook 73 to rotate around the pin and stretch the spring 72 until the slot 8 engages with the inclined groove 9. The rebound force of the spring 72 can make the slot 8 fit tightly against the inner wall of the inclined groove 9, thereby achieving auxiliary fixation of the sealing disc 6. This structure does not require additional power to drive it and can automatically complete the fixation by the movement of the sealing disc 6, solving the problem of difficulty in aligning the new dehydration tank 3 when the sealing disc 6 falls naturally.

[0034] The bottom of the hook 73 is provided with a slot 8, and one side of the hook 73 is set as a slope.

[0035] The inclined surface of the hook 73 is in the same direction as the inclined surface of the inclined groove 9 of the sealing disc 6. The same inclined direction can reduce the resistance when the inclined surface is squeezed, making the sealing disc 6 move more smoothly, while ensuring that the hook 73 can be accurately engaged in the inclined groove 9, thus improving the reliability of the auxiliary fixation.

[0036] The top and bottom of the sealing disc 6 are provided with inclined grooves 9 for the hooks 73 to fit.

[0037] Specifically, the bottom of the inclined groove 9 of the sealing disc 6 is provided with an arc-shaped transition surface, and the end of the hook 73 near the slot 8 is provided with an arc-shaped end that matches the arc-shaped transition surface. When it is necessary to release the hook 73 from fixing the sealing disc 6, press the end of the hook 73 to make the hook 73 rotate, and the arc-shaped end can slide smoothly along the arc-shaped transition surface, avoiding the operation jam caused by the sharp corners between the hook 73 and the inclined groove 9, improving the convenience of disassembling and installing the sealing disc 6, and further shortening the replacement time of the dehydration tank 3.

[0038] The surface of the trachea 2 is equipped with a manual valve 10 and an electric control valve 11;

[0039] Furthermore, the manual valve 10 and the electrically controlled valve 11 are arranged sequentially along the length of the gas pipe 2, with the electrically controlled valve 11 closer to the side of the frame 1. The manual valve 10 adopts a ball valve structure, and the electrically controlled valve 11 adopts a solenoid valve structure. Both are electrically connected to an external PLC controller. When the gas alarm 13 detects that the gas level in the frame 1 exceeds the standard, the PLC controller can automatically control the electrically controlled valve 11 to close, thereby quickly cutting off the gas supply to the gas pipe 2. If the electrically controlled valve 11 fails, the operator can close the gas pipe 2 through the manual valve 10, forming a double gas cut-off guarantee, solving the problem of increased gas leakage risk caused by the failure of a single valve, and improving the operational safety of the device.

[0040] A cover 12 is hinged to the top of the frame 1, and a gas alarm 13 is installed inside the cover 12;

[0041] The cover 12 is made of carbon steel, and the edge of the cover 12 is equipped with a sealing strip that matches the top of the frame 1. The outer side of the cover 12 can be equipped with a handle for easy opening. The gas alarm 13 is fixed to the inside of the cover 12 by a bracket, and the detection probe of the gas alarm 13 faces the internal space of the frame 1. The sealing strip can reduce the interference of the external environment on the gas concentration detection inside the frame 1, ensuring the accuracy of the detection results of the gas alarm 13. The detection probe facing the inside of the frame 1 can quickly detect gas leaks inside the frame 1. With the handle, it is convenient for staff to open the cover 12 for maintenance, improving the convenience and safety of the device operation and maintenance.

[0042] The manual valve 10, the electric control valve 11, the gas alarm 13, and the dehydration tank 3 involved in this application are all implemented using existing mature technologies and are connected to an external PLC controller and power supply. This is a conventional technical means in this field, so their specific circuit connections, control logic, and working processes will not be described in detail.

[0043] This device connects natural gas to one of the gas pipes 2 and the other gas pipe 2 to the receiving device. The dehydration tank 3 is connected to both gas pipes 2 via bolts. Opening the manual valve 10 and the electric control valve 11 allows gas to enter the dehydration tank 3 for dehydration. The dehydration tank 3 has an indicator on its surface; when a threshold is reached, it prompts for replacement. To replace the dehydration tank 3, first separate the old dehydration pipe from the two gas pipes 2. The sealing disc 6 approaches the two hooks 73 and compresses the bellows 14. Two inclined grooves 9 on the surface of the sealing disc 6 are respectively adapted to the two hooks 73. One end of the hook 73's inclined surface adapts to the inclined surface inside the inclined groove 9. The inclined groove 9 compresses the hook 73, causing it to rotate within the groove 71 and deforming the spring 72 until the groove 8 on the surface of the hook 73 engages with the inclined surface of the sealing disc 6. The slot 9 engages to assist in fixing the sealing disc 6, preventing it from drooping and causing inconvenience in installing the new dehydration tank 3. Rotating the support column 41, the new dehydration tank 3 is rotated between the two gas pipes 2. By pressing the ends of the hooks 73 closer together, the hooks 73 are not engaged with the sealing disc 6, allowing the sealing disc 6 to be installed on the end of the new dehydration tank 3. At the same time, the annular bracket 42 and the mounting ring 5 are detachably connected by bolts, facilitating the removal of the old dehydration tank 3. In use, the cover 12 is placed on top of the frame 1. Since the bottom of the frame 1 is hollow, it is convenient to operate the sealing disc 6 without affecting the use of the gas alarm 13. The gas alarm 13 can detect whether the gas level in the frame 1 exceeds the standard. It can be shut off by remotely controlling the gas pipe 2 via the electric valve 11 or manually.

[0044] The dehydration tank 3 is a pressure-resistant cylindrical tank with end plates at both ends equipped with sealing grooves (fitting into the external sealing plate 6). Inside, four functional zones are arranged sequentially along the gas flow direction: the inlet pretreatment zone is adjacent to the gas inlet and has a built-in conical gas distributor to evenly distribute the natural gas entering the tank, preventing uneven adsorption / absorption caused by localized airflow impacting the dehydration core layer. Below the distributor is a metal filter (pore size ≤ 1mm) to intercept residual solid impurities in the natural gas, preventing contamination of the dehydration medium.

[0045] The core dehydration area (functional core) varies in structure depending on the dehydration principle, but all adopt a modular design for quick replacement:

[0046] Molecular sieve adsorption type: Built-in detachable sieve cylinder (closed on all sides, with guide holes with a diameter of <0.3mm at the top and bottom), the sieve cylinder is filled with 13X type molecular sieve (particle size 3-5mm), the side wall of the sieve cylinder is equipped with a buffer sealing ring to fit against the inner wall of the tank, and the bottom is connected to the tank through a spring 72 bracket, which can be used with an external vibrator to improve adsorption efficiency.

[0047] Triethylene glycol absorption type: It adopts a double-layer structure of "spray and packing". The upper layer is an atomizing nozzle sprayer (connected to an external lean liquid pipe), and the lower layer is a stepped packing layer (filled with corrugated ceramic packing and built-in staggered baffles) to ensure that triethylene glycol and natural gas have full countercurrent contact.

[0048] Simple separation type: It has a built-in spiral guide vane and a mesh separating plate, which uses centrifugal force to separate liquid water. An inclined water collection tank is set at the bottom and connected to a drain valve.

[0049] The secondary fine treatment zone is located downstream of the core dehydration zone. The molecular sieve type tank is equipped with a secondary adsorption chamber (with built-in compressed molecular sieve plate) to further capture the trace amounts of water that have not been adsorbed. The absorption type and separation type tanks are equipped with wire mesh demisters (woven stainless steel wire, 50mm thick) to intercept entrained dehydration medium droplets (such as triethylene glycol droplets).

[0050] The outlet buffer zone is located near the gas outlet end and is equipped with a cylindrical flow stabilizing chamber to ensure that the dehydrated natural gas smoothly converges to the outlet, avoiding pressure fluctuations caused by airflow disturbances.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A natural gas gathering station dewatering apparatus, characterized by, include: The frame (1), air pipe (2), dehydration tank (3) and replacement mechanism (4) are provided. Air pipe (2) is embedded in both sides of the frame (1). Multiple dehydration tanks (3) are provided in the frame (1). The replacement mechanism (4) is installed in the frame (1) and is used to quickly replace the new dehydration tank (3) and connect it to the two air pipes (2). The replacement mechanism (4) includes a support column (41) and an annular bracket (42). The support column (41) is rotatably installed inside the frame (1). Two annular brackets (42) are fixedly installed on the surface of the support column (41). An installation ring (5) adapted to the annular bracket (42) is fixedly installed on the surface of the dehydration tank (3).

2. A natural gas gathering station dewatering device according to claim 1, characterized in that: The annular bracket (42) and the mounting ring (5) are detachably connected by bolts.

3. A natural gas gathering station dewatering device according to claim 1, characterized in that: Both of the two air pipes (2) are fitted with sealing discs (6) on adjacent sides via corrugated pipes (14). The sealing discs (6) are detachably connected to the end plate of the dehydration tank (3) by bolts, and the sealing discs (6) are sealed to the end plate of the dehydration tank (3).

4. A natural gas gathering station dewatering device according to claim 3, characterized in that: Both sides of the frame (1) are provided with clamping members (7) to assist in fixing the sealing disc (6). The clamping member (7) includes a groove (71), a spring (72) and a hook (73). The top and bottom of the air pipe (2) are provided with grooves (71). The grooves (71) are opened inside the frame (1) and hooks (73) are rotatably installed inside. The surface of the hook (73) is hinged to the inner wall of the groove (71) with a spring (72).

5. A natural gas gathering station dewatering device according to claim 4, wherein: The bottom of the hook (73) is provided with a slot (8), and one side of the hook (73) is set as an inclined surface.

6. A natural gas gathering and transmission station dehydration device according to claim 5, characterized in that: The sealing disc (6) has inclined grooves (9) at the top and bottom for the hooks (73) to fit.

7. A natural gas gathering station dewatering device according to claim 1, characterized in that: The surface of the trachea (2) is provided with a manual valve (10) and an electric control valve (11).

8. A natural gas gathering station dewatering device according to claim 1, characterized in that: The top of the frame (1) is hinged to a cover (12), and a gas alarm (13) is installed inside the cover (12).

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