Relief device of offshore platform

Abstract

The invention relates to a relief device of an offshore platform. The relief device comprises a device body, a splash board, a liquid level switch and a control unit. And an injection pipe penetrates through the top of the device body. The splash-proof plate is arranged in the device body and divides the inner space of the device body into a first cavity and a second cavity. The outlet end of the injection pipe extends into the first cavity and faces the inner side wall of the device body. The bottom of the second cavity is communicated with the bottom of the first cavity, a liquid outlet is formed in the bottom of the second cavity, a liquid discharge valve is arranged at the liquid outlet, and an exhaust port is formed in the top of the second cavity. The liquid level switch is arranged on the device body and used for detecting the liquid level in the device body and sending out a liquid drainage starting signal or a liquid drainage stopping signal. And the control unit is connected with the liquid level switch and the liquid discharge valve and is used for controlling the action of the liquid discharge valve according to the liquid discharge stopping signal or the liquid discharge starting signal. The discharging device can remarkably reduce the phenomena of liquid splashing and back spraying, improves the safety of the liquid discharging process, and is high in automation level, liquid discharging accuracy and reliability.

Description

Technical Field

[0001] This invention relates to the field of marine engineering equipment technology, and in particular to a release device for an offshore platform. Background Technology

[0002] With the widespread application of offshore hydrogen-methanol-ammonia platforms in the energy equipment field, the air compressors, hydrogen compressors, ammonia systems, process pipelines, and related equipment on these platforms continuously generate condensate, oil-water mixtures, and liquids containing impurities during long-term operation. If these liquids are not drained in a timely manner, they can cause internal corrosion and pipeline blockage, and may also trigger false alarms, pressure fluctuations, or even equipment protection activation, adversely affecting the safe operation of the platform. Therefore, in the complex, high-humidity, high-pressure, and high-vibration operating environment at sea, a reliable, highly safe, and easy-to-maintain drainage system is needed to stably release these liquids.

[0003] However, most venting structures commonly used in current engineering projects employ a simple direct-discharge design. When the high-pressure mixture is released at the moment of activation, it easily splashes, contaminating surrounding equipment and potentially causing the spread of condensate containing volatile media, posing a significant flammable gas safety risk. Furthermore, traditional systems generally lack automatic liquid level detection and automatic drainage functions, requiring operators to conduct regular inspections and manually vent, which is not only labor-intensive but also prone to liquid accumulation due to delayed judgment. Summary of the Invention

[0004] One objective of this invention is to address the shortcomings of existing technologies, such as the susceptibility to high-pressure splashing during the discharge process and the reliance on manual operation, by providing a discharge device for offshore platforms. To solve the above-mentioned technical problems, this invention adopts the following technical solution:

[0005] A release device for an offshore platform, comprising: The device body is designed with a hollow internal structure, and an injection tube is inserted through the top of the device body; A splash guard is installed inside the device body. The splash guard divides the internal space of the device body into a first cavity and a second cavity arranged in parallel along the horizontal direction. The outlet end of the injection tube extends into the first cavity and faces the inner wall of the device body. The bottom of the second cavity is connected to the bottom of the first cavity. The bottom of the second cavity is provided with a drain port and a drain valve. The top of the second cavity is provided with an exhaust port. A liquid level switch is installed on the device body. The liquid level switch is used to detect the liquid level in the device body and send a signal to start or stop the liquid discharge. The control unit is connected to the level switch and the drain valve. The control unit is used to control the operation of the drain valve according to the stop drain signal or start drain signal.

[0006] In one embodiment, the injection tube includes a straight section and a curved section. The top end of the straight section passes through the top of the device body, and the bottom end of the straight section extends into the first cavity. One end of the curved section is connected to the straight section, and the other end faces the inner wall of the device body. The tangent direction of the curved section at the port away from the straight section forms an acute angle with the inner wall of the device body.

[0007] In one embodiment, the upper and lower edges of the splash guard are respectively connected and fixed to the top and bottom walls of the inner cavity of the device body; The splash guard has multiple first through holes at its lower edge, and each first through hole connects to the bottom of the first cavity and the bottom of the second cavity respectively; Multiple second through holes are provided on the upper edge of the splash guard, and each second through hole is connected to the top of the first cavity and the top of the second cavity respectively.

[0008] In one embodiment, the venting device of the offshore platform includes a drain pipe, one end of which is connected to a drain outlet, and a drain valve is provided on the drain pipe.

[0009] In one embodiment, the level switch is a multi-point level switch, which is arranged vertically on the side wall of the device body and located in the second cavity. The level switch has a first detection point and a second detection point. The first detection point is located below the second detection point. The first detection point is used to send a stop discharge signal, and the second detection point is used to send a start discharge signal.

[0010] In one embodiment, the level switch is further provided with a third detection point, which is located above the second detection point and is used to issue an over-high alarm signal.

[0011] In one embodiment, the venting device of the offshore platform also includes a gas detection sensor, which is disposed on top of the device body and is used to detect the concentration of combustible gas inside the device body. The device body is equipped with an air inlet for connecting to an inert gas supply device. The control unit is connected to a gas detection sensor and is used to input inert gas into the device body when the combustible gas concentration reaches a set threshold.

[0012] In one embodiment, the venting device of the offshore platform includes an air intake pipe, one end of which is connected to an air inlet and the other end of which is connected to an inert gas supply device. An air intake valve is provided on the air intake pipe and is connected to a control unit.

[0013] In one embodiment, the device body includes a cylindrical body and a top cover, the cylindrical body being a hollow structure with one end open, and the top cover covering the opening of the cylindrical body. The top cover includes a fixed cover plate and a movable cover plate. The fixed cover plate is fixedly installed at the opening of the cylinder corresponding to the first cavity, and the injection pipe passes through the fixed cover plate. The movable cover plate is closable and is arranged at the opening of the cylinder corresponding to the second cavity.

[0014] In one embodiment, the movable cover plate is hinged to the fixed cover plate; The device body also includes a locking element, which is disposed between the movable cover plate and the cylinder. The locking element is used to lock the movable cover plate in the position of closing the opening of the cylinder.

[0015] As can be seen from the above technical solution, the present invention has at least the following advantages and positive effects: In this invention, the discharge device includes a device body, a splash guard, a level switch, and a control unit. The splash guard within the device body divides the interior into a first chamber and a second chamber. The outlet end of the injection pipe extends into the first chamber and faces the inner wall of the device body. Thus, when the discharge fluid enters the device body through the injection pipe, it first impacts the inner wall of the device body and is rapidly diffused, buffered, and settled upon contact, achieving both kinetic energy release and splash prevention—a first layer of splash protection. Simultaneously, due to the blocking effect of the splash guard, it guides the liquid to flow slowly, shielding against droplet splashing—a second layer of splash protection. This significantly reduces liquid splashing and backflow, improving the safety of the discharge process.

[0016] Furthermore, by incorporating a level switch and a control unit, the level switch can detect the liquid level within the device body in real time and send a corresponding signal, enabling the control unit to control the operation of the drain valve accordingly. This achieves the automatic draining function of the venting device, allowing it to complete accurate draining under unattended conditions. This, in turn, improves the automation level of the venting device and enhances its draining accuracy and reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a discharge device for an offshore platform according to an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A schematic diagram of the splash guard in the structure shown.

[0019] The annotations in the attached figures are explained as follows: 10-Phase body; 11-First cavity; 12-Second cavity; 13-Injection pipe; 131-Straight pipe section; 132-Bend pipe section; 14-Drain valve; 15-Drain pipe; 16-Exhaust pipe; 17-Inlet pipe; 18-Cylinder; 19-Top cover; 191-Fixed cover plate; 192-Modible cover plate; 20 - Splash guard; 21 - First through hole; 22 - Second through hole; 30 - Liquid level switch; 31 - First detection point; 32 - Second detection point; 33 - Third detection point; 40 - Control Unit; 50 - Gas detection sensor; 60-Locking component; 61-Screw; 62-Locking nut; 63-Locking seat; 70 - Install the web plate. Detailed Implementation

[0020] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0021] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] During the operation of the process systems on offshore hydrogen, alcohol, and ammonia platforms, air compressors, hydrogen compressors, ammonia systems, process pipelines, and related equipment continuously generate condensate, oil-water mixtures, and liquids containing impurities over long-term operation. If these liquids cannot be drained in a timely manner, they can cause internal equipment corrosion, false sensor alarms, and system pressure fluctuations. Furthermore, liquid accumulation can lead to process failures or safety hazards. Meanwhile, the high volatility, flammability, and corrosiveness of hydrogen, alcohols, and ammonia necessitate that the venting devices on offshore platforms, operating in this high-risk environment, meet multiple requirements, including accurate drainage, splash protection, easy maintainability, and flammable gas protection.

[0024] Based on this, the present invention provides a discharge device for offshore platforms that at least meets the requirements of discharge accuracy, splash prevention safety, visible maintainability, and flammable gas protection. The specific embodiments of the discharge device for offshore platforms of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Please see Figure 1 As shown, the venting device for an offshore platform (hereinafter referred to as the venting device) according to an embodiment of the present invention includes a device body 10, a splash guard 20, a liquid level switch 30, and a control unit 40. The device body 10 is configured as a hollow structure, and an injection pipe 13 passes through the top of the device body 10. The splash guard 20 is disposed inside the device body 10, and the splash guard 20 divides the internal space of the device body 10 into a first cavity 11 and a second cavity 12 arranged side by side in a horizontal direction. The outlet end of the injection pipe 13 extends into the first cavity 11 and faces the inner wall of the device body 10. The bottom of the second cavity 12 communicates with the bottom of the first cavity 11, and the bottom of the second cavity 12 is provided with a drain port, a drain valve 14 is provided at the drain port, and the top of the second cavity 12 is provided with an exhaust port.

[0026] A level switch 30 is mounted on the device body 10. The level switch 30 is used to detect the liquid level inside the device body 10 and send a start drain signal or a stop drain signal. The control unit 40 is connected to the level switch 30 and the drain valve 14. The control unit 40 is used to control the operation of the drain valve 14 according to the stop drain signal or the start drain signal.

[0027] In this invention, the discharge device includes a device body 10, a splash guard 20, a liquid level switch 30, and a control unit 40. The device body 10 is equipped with a splash guard 20, which divides the device body 10 into a first cavity 11 and a second cavity 12. The outlet end of the injection pipe 13 extends into the first cavity 11 and faces the inner wall of the device body 10. Thus, when the discharge fluid enters the device body 10 through the injection pipe 13, the discharge fluid first impacts the inner wall of the device body 10, and upon contact with the wall, it is rapidly diffused, buffered, and settled, achieving both kinetic energy discharge and splash prevention, thus achieving a first layer of splash prevention. Simultaneously, due to the blocking effect of the splash guard 20, it can guide the liquid to slowly fall, shielding the droplets from splashing, achieving a second layer of splash prevention. This significantly reduces liquid splashing and backflow, improving the safety of the discharge process.

[0028] Furthermore, by setting up a level switch 30 and a control unit 40, the level switch 30 can detect the liquid level in the device body 10 in real time and send a corresponding signal, enabling the control unit 40 to control the operation of the drain valve 14 accordingly. This realizes the automatic draining function of the venting device, allowing it to complete accurate draining under unattended conditions, thereby improving the automation level of the venting device and enhancing its draining accuracy and reliability.

[0029] like Figure 1 As shown, the main body 10 of the device is mainly used to receive the gas-liquid mixture with a certain pressure generated by the offshore platform, and to serve as a cavity for gas-liquid separation and sedimentation of the gas-liquid mixture.

[0030] Optionally, the device body 10 is configured as a hollow cavity structure. The device body 10 can be cylindrical or cuboid in shape, depending on the actual requirements.

[0031] See Figure 1 In one embodiment, the device body 10 includes a cylindrical body 18 and a top cover 19. The cylindrical body 18 is a hollow structure with an opening at one end, and the top cover 19 covers the opening of the cylindrical body 18. Optionally, the cylindrical body 18 can be a one-piece structure. Alternatively, the cylindrical body 18 can also be formed by welding a base plate to one end of a tube.

[0032] like Figure 1 As shown, the top cover 19 includes a fixed cover plate 191 and a movable cover plate 192. The fixed cover plate 191 is fixedly installed at the opening of the cylinder 18 corresponding to the first cavity 11. Optionally, the fixed cover plate 191 may be welded to the opening of the cylinder 18. The fixed cover plate 191 can close part of the opening of the cylinder 18. For example, the fixed cover plate 191 can completely cover the top opening of the first cavity 11, thereby preventing the gas-liquid mixture entering the first cavity 11 through the injection pipe 13 from leaking from the top of the first cavity 11.

[0033] like Figure 1 As shown, the movable cover 192 is closable and disposed at the opening of the cylinder 18 and is arranged corresponding to the second cavity 12. The closable cover 192 allows for visual and intuitive inspection of the liquid level, blockage, or scaling of the splash guard 20 within the device body 10 without disassembling the top cover 19 or other components of the device body 10. This improves the maintainability and efficiency of the venting device.

[0034] By incorporating an openable and closable cover 192, maintenance personnel can quickly inspect equipment without interrupting power or operation, effectively reducing downtime and improving maintainability and visibility. This visual inspection capability is particularly important for offshore methanol-ammonia platforms, where space is limited, maintenance is difficult, and continuous operation is required. It enables maintenance personnel to quickly assess the status of the equipment without interrupting power or operation, significantly improving the maintainability and real-time performance of offshore engineering equipment.

[0035] See Figure 1 Optionally, the movable cover 192 is hinged to the fixed cover 191. For example, the movable cover 192 and the fixed cover 191 can be hinged together. This helps maintenance personnel to quickly open the movable cover 192 in confined spaces and high-humidity environments to check the internal condition of the cavity, improving the maintainability and efficiency of the venting device.

[0036] It is understood that in other embodiments, the movable cover plate 192 may also be hinged to the top of the cylinder 18, and the specific configuration may be made according to actual needs.

[0037] See Figure 1 In one embodiment, the device body 10 further includes a locking member 60, which is disposed between the movable cover plate 192 and the cylinder 18. The locking member 60 is used to lock the movable cover plate 192 in the position of closing the opening of the cylinder 18.

[0038] Optionally, the locking element 60 may include a screw 61, a locking nut 62, and a locking seat 63. The locking seat 63 may be fixed to the outer wall of the cylinder 18. The bottom end of the screw 61 is hinged to the locking seat 63, and the locking nut 62 is rotatably mounted on the top end of the screw 61. The outer edge of the movable cover plate 192 may have a notch for the middle part of the screw 61 to pass through. Optionally, the locking nut 62 may be a wing nut.

[0039] When maintenance or confirmation of emission effectiveness is required, the operator can loosen the locking nut 62 and rotate the screw 61 to disengage it from the notch of the movable cover 192. This allows the operator to easily lift the movable cover 192 to observe whether there is residual liquid, dirt, corrosion, or structural blockage inside the device body 10, and also to check whether the splash guard 20 is functioning properly. After inspection, the movable cover 192 is closed, and the screw 61 is rotated to pass through the notch. The locking nut 62 is then tightened to abut against the upper surface of the movable cover 192, thus locking the movable cover 192 in the position of the closed cylinder 18 opening.

[0040] Alternatively, in other embodiments, the locking element 60 may adopt other locking structures, which can be set according to actual needs. For example, the locking element 60 may include a latch and a hook, with the latch disposed on the movable cover plate 192, the bottom end of the hook rotatably connected to the cylinder 18, and the top end of the hook able to hook onto the latch.

[0041] refer to Figure 1 As shown, the device body 10 can be arranged vertically as a whole, with an injection pipe 13 passing through its top. The injection pipe 13 is mainly used to connect to process equipment on the offshore platform, such as air compressors, hydrogen compressors, ammonia systems, and process pipelines, so as to introduce the mixed fluids generated by these process equipment into the device body 10 for venting.

[0042] Optionally, the injection pipe 13 may be inserted through the fixed cover plate 191. The injection pipe 13 may extend vertically. That is, the upper end of the injection pipe 13 is inserted through and fixed to the fixed cover plate 191, and the lower end of the injection pipe 13 extends downward into the first cavity 11. This helps to allow the mixed fluid generated by each process device to enter the device body 10 under the action of gravity.

[0043] like Figure 1 As shown, the outlet end of the injection pipe 13 faces the inner wall of the device body 10. That is, the port of the injection pipe 13 that extends into the first cavity 11 faces the inner wall of the device body 10, so that when the mixed fluid enters through the injection pipe 13, it can be sprayed toward the side wall of the device body 10, and the mixed fluid can diffuse, decelerate and settle along the wall surface. This helps to suppress the dynamic pressure impact of the mixed fluid entering the first cavity 11, reduce liquid splashing and backflow, and improve the safety of the discharge process.

[0044] Optionally, the end of the injection tube 13 extending into the first cavity 11 can be configured as a bend. For example, the injection tube 13 may include a straight section 131 and a bend section 132. The top end of the straight section 131 passes through the top of the device body 10, and the bottom end of the straight section 131 extends into the first cavity 11. One end of the bend section 132 is connected to the straight section 131, and the other end faces the inner wall of the device body 10. The tangent direction of the bend section 132 at the port away from the straight section 131 forms an acute angle with the inner wall of the device body 10.

[0045] In this embodiment, the outlet end of the injection pipe 13 is configured as a bend, with its outlet tangent forming an acute angle with the inner wall of the device body 10. This allows the mixed fluid to enter along the wall at an acute tangential angle. This non-vertical wall injection + wall-attached diffusion method can achieve kinetic energy dispersion the moment the mixed fluid enters, allowing the liquid to slowly fall along the wall. This helps to suppress splashing, droplet escaping, and backflow from the source, reducing the risk of liquid ingress impact and liquid splashing, and improving the safety of the discharge process.

[0046] like Figure 1 As shown, the device body 10 has a splash guard 20 inside, which mainly serves to block splashes. Optionally, the splash guard 20 can be arranged vertically. That is, the upper and lower ends of the splash guard 20 can be perpendicular to the top and bottom walls of the device body 10, respectively. The splash guard 20 can divide the internal space of the device body 10 into two cavities, left and right.

[0047] Among them, such as Figure 2 As shown, the splash guard 20 can be roughly rectangular in shape. The two sides of the splash guard 20 can be respectively attached to the inner sidewall of the device body 10, so that the liquid in the first cavity 11 can only flow from the bottom to the second cavity 12.

[0048] It is understood that in other embodiments, the splash guard 20 can also be inclinedly disposed inside the device body 10, with its upper and lower ends intersecting the top and bottom walls of the device body 10 respectively, thus dividing the internal space of the device body 10 into left and right cavities. The specific arrangement can be made according to actual needs.

[0049] See Figure 1 and Figure 2 The bottom of the second cavity 12 can be connected to the bottom of the first cavity 11 in the following manner: For example, the upper and lower edges of the splash guard 20 are respectively connected and fixed to the top and bottom walls of the inner cavity of the device body 10. A plurality of first through holes 21 are provided at the lower edge of the splash guard 20, each first through hole 21 connecting to the bottom of the first cavity 11 and the bottom of the second cavity 12. Optionally, the first through holes 21 can be configured as open structures penetrating the lower edge of the splash guard 20.

[0050] In this embodiment, by providing multiple first through holes 21, the mixed fluid can flow smoothly into the second cavity 12 when passing through the splash guard 20, thereby achieving slow release and diversion of the liquid, which helps to ensure a stable liquid level in the device body 10.

[0051] It is understood that in other embodiments, the lower edge of the splash guard 20 may be spaced a certain distance from the bottom wall of the device body 10, and this distance may enable communication between the bottom of the first cavity 11 and the bottom of the second cavity 12. The specific configuration can be adjusted according to actual needs.

[0052] like Figure 2 As shown, optionally, a plurality of second through holes 22 are provided at the upper edge of the splash guard 20, and each second through hole 22 is connected to the top of the first cavity 11 and the top of the second cavity 12 respectively. Optionally, the second through holes 22 can be configured as open structures that penetrate the upper edge of the splash guard 20.

[0053] In this embodiment, by providing multiple second through holes 22, the top of the first cavity 11 and the top of the second cavity 12 can be connected, which helps to ensure the gas phase pressure balance inside the device body 10 and helps to maintain the stability of the liquid level inside the device body 10.

[0054] It is understood that in other embodiments, the upper edge of the splash guard 20 may be spaced a certain distance from the top wall of the device body 10, and this distance may enable communication between the top of the first cavity 11 and the top of the second cavity 12. The specific configuration can be adjusted according to actual needs.

[0055] refer to Figure 1 As shown, the bottom of the second cavity 12 is provided with a drain port, and a drain valve 14 is provided at the drain port. Optionally, the discharge device of the offshore platform also includes a drain pipe 15, one end of which is connected to the drain port to receive the mixed liquid that has settled inside the device body 10. It can be understood that the other end of the drain pipe 15 can be connected to a designated discharge area of ​​the platform to guide the settled mixed liquid to the designated discharge area of ​​the platform.

[0056] Optionally, the drain valve 14 can be installed on the drain pipe 15. The drain valve 14 can be a solenoid valve.

[0057] refer to Figure 1 As shown, the top of the second cavity 12 is provided with an exhaust port. Optionally, the device body 10 may be provided with an exhaust pipe 16 at the exhaust port.

[0058] In this embodiment, the exhaust port and exhaust pipe 16 can connect the internal space of the device body 10 and the external environment, and can discharge the gas inside the device body 10, thereby helping to maintain the pressure balance inside the device body 10, avoiding gas resistance during liquid discharge, and thus improving the accuracy of liquid level detection and the response speed of liquid discharge action.

[0059] refer to Figure 1 As shown, the liquid level switch 30 is mainly used to detect the liquid level inside the device body 10 and send relevant signals to realize the automatic liquid discharge and over-limit alarm functions of the discharge device.

[0060] For example, such as Figure 1As shown, the level switch 30 can be a multi-point level switch 30. The level switch 30 can be arranged vertically on the side wall of the device body 10 and located in the second cavity 12. Optionally, the level switch 30 can be arranged on the side wall of the second cavity 12 that is spaced apart from the splash guard 20. Since the level switch 30 is arranged in the second cavity 12, the splash guard 20 can prevent the mixed fluid injected into the device body 10 from directly impacting the level switch 30, thereby helping to ensure the accuracy and reliability of level detection and enabling the level switch 30 to accurately reflect the level for a long time.

[0061] refer to Figure 1 The level switch 30 may have a first detection point 31 and a second detection point 32, with the first detection point 31 located below the second detection point 32. The first detection point 31 is used to send a stop discharge signal, and the second detection point 32 is used to send a start discharge signal.

[0062] like Figure 1 As shown, the first detection point 31 can be arranged at a lower position of the device body 10, such as position A. When the liquid level in the device body 10 drops to position A, the first detection point 31 is triggered and can send a stop drainage signal to the control unit 40. Thus, the control unit 40 can instruct the drainage valve 14 to close according to the stop drainage signal, so that the drainage device stops draining liquid, avoiding air entry or malfunction caused by the drainage device continuing to drain liquid.

[0063] like Figure 1 As shown, the second detection point 32 can be arranged at a higher position on the device body 10, such as position B. When the liquid level in the device body 10 rises to position B, the second detection point 32 is triggered and can send a start-drainage signal to the control unit 40. Thus, the control unit 40 can instruct the drain valve 14 to open according to the start-drainage signal, causing the discharge device to start the drainage action and realize the automatic discharge function of the discharge device.

[0064] See Figure 1 In one embodiment, the liquid level switch 30 may also be provided with a third detection point 33, which is located above the second detection point 32, and the third detection point 33 is used to issue an over-high alarm signal.

[0065] For example, the third detection point 33 can be located at a higher position in the device body 10, such as position C. When the liquid level in the device body 10 continues to rise to position C, the third detection point 33 is triggered and can send an over-high alarm signal to the control unit 40. The control unit 40 can then issue an alarm based on this over-high alarm signal to remind personnel to promptly check the discharge status or potential faults, preventing the continued accumulation of condensate that could lead to device overflow, discharge failure, or other risks.

[0066] In embodiments of the present invention, the liquid level switch 30 is provided with a first detection point 31, a second detection point 32 and a third detection point 33, which can realize a three-stage intelligent control logic of automatic discharge at high liquid level, stop discharge at low liquid level and alarm at high liquid level. This is conducive to realizing the unattended and safe intelligent discharge process of the discharge device, and realizing the liquid level alarm and predictive maintenance functions of the discharge device.

[0067] It is understandable that in other implementations, multiple liquid level switches 30 can also be installed on the device body 10. Each liquid level switch 30 can be used to detect liquid levels at different heights and issue a stop discharge signal, a start discharge signal, or an over-high alarm signal respectively. The specific settings can be configured according to actual needs.

[0068] It is understood that in other implementations, the level switch 30 can also be a non-contact switch, such as an ultrasonic level switch or a photoelectric level switch, which can be installed outside the device body 10 and can detect the liquid level inside the device body 10. The specific configuration can be determined according to actual needs.

[0069] See Figure 1 In some embodiments, the venting device of the offshore platform also includes a gas detection sensor 50, which is disposed on the top of the device body 10 and is used to detect the concentration of combustible gas inside the device body 10.

[0070] Optionally, the gas detection sensor 50 can be mounted on the movable cover plate 192, and its detection probe can extend into the second cavity 12 to detect the concentration of combustible gas inside the device body 10.

[0071] like Figure 1 As shown, the control unit 40 is connected to the gas detection sensor 50 and is used to input inert gas into the device body 10 when the combustible gas concentration reaches a set threshold. For example, the device body 10 may be provided with an air inlet for communication with an inert gas supply device. Optionally, the venting device for the offshore platform also includes an air inlet pipe 17, one end of which is connected to the air inlet, and the other end of which is connected to the inert gas supply device. An air inlet valve may be provided on the air inlet pipe 17, and the air inlet valve is connected to the control unit 40.

[0072] In this embodiment, when the concentration of combustible gas exceeds a set threshold, the gas detection sensor 50 can send a signal to the control unit 40, enabling the control unit 40 to control the opening of the intake valve and allow the inert gas supply device to input inert gas into the device body 10 through the intake pipe 17, so that the combustible gas in the device body 10 is quickly diluted and discharged in a direction through the exhaust pipe 16, thereby reducing the risk of combustible gas accumulation and improving the safety level of the venting device.

[0073] After the combustible gas concentration returns to a safe range, the control unit 40 can control the intake valve to close and stop the input of inert gas into the device body 10, thereby keeping the inert gas supply process controlled, continuous and without human intervention, ensuring that the release device has an adaptive safe inerting capability in the marine hydrogen alcohol ammonia platform environment.

[0074] See Figure 1 In some embodiments, the device body 10 may be provided with a mounting web 70, which can be used to install and fix the device body 10 to an external fixing object. Optionally, the mounting web 70 may be configured as a flange structure.

[0075] Taking the emission conditions of a certain type of air compressor on an offshore hydrogenated ammonia platform as an example, the venting device of the offshore platform in this embodiment of the invention is used as follows: In offshore methanol-ammonia platforms, air compressors and related process equipment continuously generate condensate, oil-water mixtures, and liquids containing impurities during operation. If these accumulated liquids cannot be drained in a timely manner, they can cause internal equipment corrosion and false alarms, and may also lead to abnormal system pressure due to liquid buildup. Therefore, the venting device of this invention can be installed at the air compressor's drain outlet to achieve automatic, safe, and visible discharge of condensate.

[0076] refer to Figure 1 As shown, the device body 10 can be fixed to the air compressor drain port position by mounting the web plate 70, so that the air compressor condensate or gas-liquid mixture enters the device body 10 through the injection pipe 13.

[0077] During venting, the condensate or gas-liquid mixture is tangentially injected into the first cavity 11 through the injection pipe 13. The fluid first impacts the inner wall of the device body 10, and is rapidly diffused, buffered, and settled upon contact with the wall. This suppresses splashing from the fluid source, avoiding the impact and splashing phenomena caused by traditional direct-fall structures, and significantly improving venting safety. Simultaneously, due to the blocking effect of the splash guard 20, it not only further suppresses splashing but also prevents liquid from directly impacting the level switch 30, ensuring the accuracy and reliability of level detection.

[0078] The liquid level switch 30 is fixed to the inner wall of the device body 10 and includes three independent liquid level detection points: a first detection point 31 (position A), a second detection point 32 (position B), and a third detection point 33 (position C). The first detection point 31 is used to confirm the end of drainage and to control the closing of the drainage valve 14. The second detection point 32 is used to trigger automatic drainage and to control the opening of the drainage valve 14. The third detection point 33 is used to send an alarm signal to the control unit 40 to prompt the operator to check the relief device.

[0079] For example, when the discharge begins, liquid gradually accumulates inside the device body 10. When the liquid level inside the device body 10 rises to position B, the level switch 30 sends a start discharge signal to the control unit 40. The control unit 40 then controls the discharge valve 14 to open, and the condensate is discharged through the discharge pipe 15. As the discharge proceeds, the liquid level inside the device body 10 drops to position A. The level switch 30 then sends a stop discharge signal to the control unit 40, which in turn controls the discharge valve 14 to close, completing one discharge cycle. During the discharge process, the vent pipe 16 ensures the smooth discharge of gas from the device body 10, preventing gas resistance from affecting liquid level changes and ensuring stable and reliable discharge operation.

[0080] During the drainage process, if the liquid level continues to rise to position C due to blockage by sediment, obstruction of the drainage path, jamming of the drainage valve 14, or a decrease in the drainage rate, the liquid level switch 30 can activate the control unit 40 to issue an over-high alarm signal. The control unit 40 can issue an audible and visual alarm to remind operators to check or perform emergency drainage in a timely manner to avoid abnormal liquid accumulation posing a safety threat to the platform process system.

[0081] During the use of the venting device, when the gas detection sensor 50 detects that the concentration of combustible gas exceeds a set threshold (e.g., 25% LEL), the control unit 40 will control the inlet valve to open, so as to introduce inert gas into the device body 10 through the inlet pipe 17 to dilute and replace the gas phase area and quickly reduce the concentration of combustible gas. When the concentration of combustible gas returns to a safe range (e.g., below 10% LEL) and remains stable, the control unit 40 can control the inlet valve to close.

[0082] When maintenance or confirmation of drainage effectiveness is required, operators can loosen the locking nut 62 and easily lift the movable cover 192 via the hinge. This allows for observation of the internal components of the device 10 for residual liquid, dirt, corrosion, or structural blockages without disassembling any parts. It also allows for checking the proper functioning of the splash guard 20, vent pipe 16, and other components. This visual inspection method greatly facilitates maintenance work in the limited space of offshore platforms.

[0083] The discharge device for an offshore platform according to this invention includes a splash guard that divides the device body into a first chamber and a second chamber. The outlet end of the injection pipe extends into the first chamber and faces the inner wall of the device body. Thus, when the discharge fluid enters the device body through the injection pipe, the fluid first impacts the inner wall of the device body and is rapidly diffused, buffered, and settled upon contact with the wall, achieving both kinetic energy release and splash prevention, thus achieving a first layer of splash protection. Simultaneously, due to the blocking effect of the splash guard, it guides the liquid to fall slowly, shielding droplets from splashing, achieving a second layer of splash protection. This significantly reduces liquid splashing and backflow, improving the safety of the discharge process.

[0084] Furthermore, by incorporating a level switch and a control unit, the level switch can detect the liquid level within the device body in real time and send a corresponding signal, enabling the control unit to control the operation of the drain valve accordingly. This achieves the automatic draining function of the venting device, allowing it to complete accurate draining under unattended conditions. This, in turn, improves the automation level of the venting device and enhances its draining accuracy and reliability.

[0085] The venting device for offshore platforms in this invention features a level switch with three independent detection points. This three-stage level detection system integrates automatic venting with fault diagnosis, creating a unified level control process. When the level rises to position B, the system automatically initiates venting; when the level drops to position A, it automatically stops, achieving unattended automatic venting. Furthermore, the high-level point at position C is used as a health monitoring signal for the venting path. When the level within the device reaches point C and remains above it for a set time, the control unit determines that the venting path may be blocked, the venting rate is abnormal, or the venting valve's operation is restricted, thus proactively outputting a maintenance warning and enabling predictive maintenance. By integrating automatic level control and blockage diagnosis into a complete process, this invention can achieve automatic venting, proactive identification of venting anomalies, and early fault detection without adding additional sensors, significantly improving the reliability, safety, and maintainability of the venting system.

[0086] The discharge device for offshore platforms in this invention achieves dual protection through a combination of slow-release mechanism on the inner wall of the device and a splash guard, consisting of a first layer of dynamic pressure attenuation and a second layer of droplet shielding. The splash guard employs a partitioned design with upper vent holes and lower drain holes, preventing droplets from directly impacting the level switch while maintaining stable gas-liquid separation, enabling the level switch to accurately reflect the liquid level over a long period. This dual-protection structure maintains detection stability even under high humidity, high salt spray, and high vibration conditions, representing a highly reliable and innovative measurement and control system.

[0087] The venting device for offshore platforms in this embodiment of the invention, by setting up a gas detection sensor and an inert gas inlet pipeline, can automatically perform inerting purging when the concentration of combustible gas inside the device exceeds a threshold, so that the combustible gas can be quickly reduced to a safe range, reducing the risk of dangerous gas accumulation caused by the liquid discharge process, cavity vaporization or equipment leakage, and can significantly improve the intrinsic safety level of offshore hydrogen alcohol and ammonia platforms.

[0088] The venting device for offshore platforms according to this invention features a partially openable top cover, allowing operators to quickly open the movable cover by simply loosening the locking mechanism to inspect for deposits, scale, corrosion, or channel conditions within the device, without disassembling the entire system. This structure is suitable for the confined space environment of offshore platforms, significantly shortening maintenance cycles and improving device availability.

[0089] The offshore platform venting device of this invention, through the unified collaboration of multiple functions such as fluid slow-release design, double-layer anti-splash structure, three-point automatic liquid level drainage logic, combustible gas detection and inerting method, and a visual structure with an openable and closable cover, enables the venting device to maintain stable operation under high pressure, high humidity, high temperature difference, and strong vibration environments. The structural design, control strategy, and safety methods of the venting device form an integrated solution, which can significantly improve the safety, reliability, and automation of liquid discharge from offshore methanol and ammonia platforms, and has significant engineering application value.

[0090] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0091] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A release device for an offshore platform, characterized in that, include: The device body is configured as a hollow structure, and an injection tube is inserted through the top of the device body; A splash guard is disposed within the device body. The splash guard divides the internal space of the device body into a first cavity and a second cavity arranged side by side in a horizontal direction. The outlet end of the injection tube extends into the first cavity and faces the inner wall of the device body. The bottom of the second cavity communicates with the bottom of the first cavity. The bottom of the second cavity is provided with a drain port and a drain valve. The top of the second cavity is provided with an exhaust port. A liquid level switch is installed on the device body. The liquid level switch is used to detect the liquid level in the device body and send a signal to start or stop the liquid discharge. A control unit is connected to the liquid level switch and the drain valve. The control unit is used to control the operation of the drain valve according to the stop drain signal or the start drain signal.

2. The release device for an offshore platform according to claim 1, characterized in that, The injection tube includes a straight section and a curved section. The top end of the straight section passes through the top of the device body, and the bottom end of the straight section extends into the first cavity. One end of the curved section is connected to the straight section, and the other end faces the inner wall of the device body. The tangent direction of the curved section at the port away from the straight section forms an acute angle with the inner wall of the device body.

3. The release device for an offshore platform according to claim 1, characterized in that, The upper and lower edges of the splash guard are respectively connected and fixed to the top and bottom walls of the inner cavity of the device body; The splash guard has a plurality of first through holes at its lower edge, and each first through hole is connected to the bottom of the first cavity and the bottom of the second cavity respectively; The splash guard has multiple second through holes on its upper edge, and each second through hole is connected to the top of the first cavity and the top of the second cavity, respectively.

4. The release device for an offshore platform according to claim 1, characterized in that, It includes a drain pipe, one end of which is connected to the drain port, and a drain valve is provided on the drain pipe.

5. The release device for an offshore platform according to claim 1, characterized in that, The liquid level switch is a multi-point liquid level switch, which is arranged vertically on the side wall of the device body and located in the second cavity; The liquid level switch has a first detection point and a second detection point. The first detection point is located below the second detection point. The first detection point is used to send a stop discharge signal, and the second detection point is used to send a start discharge signal.

6. The release device for an offshore platform according to claim 5, characterized in that, The liquid level switch is also provided with a third detection point, which is located above the second detection point and is used to issue an over-high alarm signal.

7. The release device for an offshore platform according to claim 1, characterized in that, It also includes a gas detection sensor, which is disposed on the top of the device body and is used to detect the concentration of combustible gas inside the device body; The device body is provided with an air inlet, which is used to communicate with an inert gas supply device. The control unit is connected to the gas detection sensor and is used to input inert gas into the device body when the combustible gas concentration reaches a set threshold.

8. The release device for an offshore platform according to claim 7, characterized in that, It includes an air intake pipe, one end of which is connected to the air inlet and the other end of which is connected to the inert gas supply device. An air intake valve is provided on the air intake pipe and the air intake valve is connected to the control unit.

9. The discharge device for an offshore platform according to claim 1, characterized in that, The device body includes a cylindrical body and a top cover. The cylindrical body is a hollow structure with one end open, and the top cover is placed over the opening of the cylindrical body. The top cover includes a fixed cover plate and a movable cover plate. The fixed cover plate is fixedly installed at the opening of the cylinder corresponding to the first cavity. The injection pipe passes through the fixed cover plate. The movable cover plate is openable and closable at the opening of the cylinder and is arranged corresponding to the second cavity.

10. The release device for an offshore platform according to claim 9, characterized in that, The movable cover plate is hinged to the fixed cover plate; The device body also includes a locking member, which is disposed between the movable cover plate and the cylinder, and is used to lock the movable cover plate in a position that closes the opening of the cylinder.

Images