Remote water injection system of liquefied hydrocarbon storage tank

Abstract

The utility model discloses a liquefied hydrocarbon storage tank remote water injection system which comprises a water injection pipeline used for being connected with a liquefied hydrocarbon storage tank and a rapid water injection safety valve connected with the tail end of the water injection pipeline. A one-way valve A, a stop valve A and a pressure transmitter A are assembled on the water injection pipeline and are sequentially arranged along the water flow direction; the rapid water injection safety valve is connected with a fire fighting water supply pipeline through a water receiving pipeline, and a stop valve B and a pressure transmitter B are arranged on the water receiving pipeline and are also sequentially arranged in the water flow direction. In addition, the water injection pipeline is further connected with a standby water pipe, and the standby water pipe is connected with a standby water source through a water injection connector and connected between the one-way valve A and the stop valve A. The standby water pipe is provided with a stop valve and a one-way valve B. The valves are sequentially arranged in the water flow direction. The system adopts highly automatic interlocking control, has the advantages of reasonable structure, simplicity and convenience in operation, safety, reliability, quick response and the like, and can remarkably improve the efficiency and the safety of water injection operation.

Description

Technical Field

[0001] The utility model relates to the technical field of safe storage of liquefied hydrocarbons, in particular to a remote water injection system for a liquefied hydrocarbon storage tank. Background Art

[0002] Water injection is a critical operation in the daily operation of liquefied hydrocarbon storage tanks, especially during water shut-off operations or responding to tank emergencies. Traditional water injection systems often suffer from slow response times, complex operations, poor sealing, and difficulty in remote control. These issues are particularly prominent in emergency situations, potentially leading to escalating accidents or delayed response, with serious impacts on personnel safety, the environment, and the tank itself.

[0003] Existing water injection systems mostly rely on manual operation or simple mechanical controls, making precise remote monitoring and rapid response difficult. Poor sealing during the water injection process can easily lead to leaks, wasting water resources and potentially causing environmental pollution and safety hazards. Furthermore, when a tank leak or other emergency occurs, traditional systems often cannot remotely and quickly shut off drainage and restart water injection to stabilize the tank and prevent further deterioration. Utility Model Content

[0004] In response to the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a remote water injection system for liquefied hydrocarbon storage tanks, which realizes highly automated interlocking control, has the advantages of reasonable structure, simple operation, safety and reliability, and rapid response, and can significantly improve the efficiency and safety of water injection operations in liquefied hydrocarbon storage tanks and other occasions.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a remote water injection system for a liquefied hydrocarbon storage tank, including a water injection pipeline for connecting the liquefied hydrocarbon storage tank and a fast water injection safety valve connected to the end of the water injection pipeline, and also including a one-way valve A, a shut-off valve A, and a pressure transmitter A assembled on the water injection pipeline and arranged in sequence along the direction of water flow.

[0006] The quick water injection safety valve is connected to the fire water supply pipeline through a water inlet pipe, and the water inlet pipe is equipped with a cut-off valve B and a pressure transmitter B arranged in sequence along the water flow direction.

[0007] A spare water pipe is connected to the water injection pipe, and the spare water pipe is connected to the spare water source through the water injection interface. The spare water pipe is connected between the one-way valve A and the cut-off valve A. The spare water pipe is equipped with a cut-off valve and a one-way valve B arranged in sequence along the water flow direction.

[0008] In the above technical solution, in order to ensure the safety of rapid water injection and to achieve rapid connection and separation of the water injection pipe and the water receiving pipe, so as to ensure the rapid operation of the water injection system, the following technical solution is provided.

[0009] The quick water injection safety valve includes a valve body, a valve core, and a pusher. The valve body is equipped with an axial water receiving pipe connected to the water injection pipe. The valve core is slidably installed in the valve body and docked with the axial water receiving pipe. The pusher is fixedly installed in the valve body and dynamically connected to the valve core. The valve core is equipped with a radial water receiving pipe that remains connected to the water receiving pipe.

[0010] In the above technical solution, in order to facilitate accurate understanding of the connection and disconnection posture of the valve core and the axial water connection pipe in the rapid water injection safety valve and to facilitate detection of gas leakage in the liquefied hydrocarbon storage tank, the following technical solution is provided.

[0011] It also includes a dangerous gas detector and a displacement detector, and the dangerous gas detector and the displacement detector are both arranged on the valve body.

[0012] In the above technical solution, in order to facilitate the control of the opening and closing of the shut-off valve A and the shut-off valve B and provide redundancy of the operation mode, the following technical solution is provided.

[0013] The shut-off valve A is equipped with a hand wheel A and a motor A, and the shut-off valve B is equipped with a hand wheel B and a motor B.

[0014] In the above technical solution, in order to achieve remote control and rapid response of the water injection system, the following technical solution is provided.

[0015] It also includes a controller, which maintains signal connection with the pressure transmitter A, motor A, driving part, pressure transmitter B, motor B, hazardous gas detector, and displacement detector through data lines, and the controller is connected to the mobile terminal signal through wireless communication signals.

[0016] Beneficial effects of the utility model:

[0017] The remote water injection system provided by this technical solution implements highly automated interlocking control and boasts a rational structure, simple operation, safety, reliability, and rapid response. It can significantly improve the efficiency and safety of water injection operations in locations such as liquefied hydrocarbon storage tanks, providing strong support for safe production and emergency response in the petrochemical industry. Furthermore, the system complies with the requirements for pipeline interface connection methods and pipe material safety levels in relevant standards such as AQ3059-2023, ensuring system compliance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a structural diagram of the quick water injection safety valve.

[0020] In the figure: 1 liquefied hydrocarbon storage tank, 2 water injection pipeline, 21 check valve A, 22 shut-off valve A, 221 handwheel A, 222 motor A, 23 pressure transmitter A, 3 fast water injection safety valve, 31 valve body, 311 axial water connection pipe, 32 valve core, 321 radial water connection pipe, 33 pusher, 4 water connection pipeline, 41 shut-off valve B, 411 handwheel B, 412 motor B, 42 pressure transmitter B, 5 spare water pipe, 51 water injection interface, 52 shut-off valve, 53 check valve B, 6 fire water supply pipeline, 71 hazardous gas detector, 72 displacement detector, 8 controller, 9 mobile terminal. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-2 A remote water injection system for a liquefied hydrocarbon storage tank 1 includes a water injection pipe 2 for connecting the liquefied hydrocarbon storage tank 1 and a fast water injection safety valve 3 connected to the end of the water injection pipe 2. It also includes a one-way valve A21, a shut-off valve A22, and a pressure transmitter A23 assembled on the water injection pipe 2 and arranged sequentially along the water flow direction.

[0023] The quick water injection safety valve 3 is connected to the fire water supply pipeline 6 through the water receiving pipe 4. The water receiving pipe 4 is equipped with a cut-off valve B41 and a pressure transmitter B42 arranged in sequence along the water flow direction.

[0024] A spare water pipe 5 is connected to the water injection pipe 2, and the spare water pipe 5 is connected to the spare water source through the water injection interface 51. The spare water pipe 5 is connected between the one-way valve A21 and the shut-off valve A22. The spare water pipe 5 is equipped with a shut-off valve 52 and a one-way valve B53 arranged in sequence along the water flow direction.

[0025] When an accident requiring water injection is detected, the quick water injection safety valve 3 starts working to connect the water injection pipe 2 with the water receiving pipe 4. After confirming that the water injection pipe 2 and the water receiving pipe 4 are connected, the shut-off valve B41 is controlled to open. At this time, the pressure transmitter A23 and the pressure transmitter B42 respectively detect the pressure of the liquefied hydrocarbon and the pressure of the fire water. When it is confirmed that the fire water pressure is greater than the liquefied hydrocarbon pressure, the shut-off valve A22 is controlled to open. At this time, the fire water in the fire water supply pipeline can be added to the storage tank through the water receiving pipe 4 and the water injection pipe 2.

[0026] When the water injection needs to be shut off, first close the shut-off valve A22, and after confirming that the shut-off valve A22 is fully closed, close the shut-off valve B41. After confirming that the shut-off valve B41 is fully closed, control the quick water injection safety valve 3 to separate the water injection pipe and the water connection pipe again, and the entire system completes the shutdown process.

[0027] The explosion-proof levels of the electrical instruments and valves mentioned above shall comply with the GB30871 hot work regulations.

[0028] When used in cold regions, the water injection pipe 2, water receiving pipe 4, and spare water pipe 5 must also be insulated and heat-traced. The connection method and safety level of each pipe must comply with standard AQ3059-2023.

[0029] The pressure transmitter A23 and the pressure transmitter B42 have the functions of local data display and remote data transmission. The one-way valve A21 can prevent the fluid in the liquefied hydrocarbon storage tank 1 from flowing back.

[0030] The backup water pipe 5 is designed as a redundant system so that the system can continue to operate normally when the quick water injection safety valve 3 fails unexpectedly. The stop valve 52 on it is manually controlled and normally closed, and the one-way valve B53 can prevent the fluid in the liquefied hydrocarbon storage tank 1 from flowing back into the backup water pipe 5.

[0031] In order to ensure the rapid water injection safety method and to achieve the rapid connection and separation of the water injection pipe 2 and the water receiving pipe 4, so as to ensure the rapid operation of the water injection system, the following technical solutions are provided.

[0032] The quick water injection safety valve 3 includes a valve body 31, a valve core 32, and a push part 33. The valve body 31 is equipped with an axial water receiving pipe 311 connected to the water injection pipe 2. The valve core 32 is slidably installed in the valve body 31 and docked with the axial water receiving pipe 311. The push part 33 is fixedly installed in the valve body 31 and is dynamically connected to the valve core 32. The valve core 32 is equipped with a radial water receiving pipe 321 that remains connected to the water receiving pipe 4.

[0033] The pushing part 33 adopts a hydraulic telescopic cylinder or an electric telescopic cylinder, which can drive the valve core 32 to telescope in the inner cavity of the valve body 31, thereby realizing the sealed docking or separation of the valve core 32 and the axial water connecting pipe 311. The water connecting pipe 4 can adopt a fire water hose and be quickly connected to the radial water connecting pipe 321.

[0034] The axial water connection pipe 311 , the valve core 32 , and the radial water connection pipe 321 enable the water injection pipe and the water connection pipe to be connected, thereby ensuring that the water transported by the fire water supply line 6 is added to the liquefied hydrocarbon storage tank 1 through the water connection pipe 4 and the water injection pipe 2 .

[0035] In order to accurately understand the connection and disconnection postures of the valve core 32 and the axial water receiving pipe 311 in the rapid water injection safety valve 3 and to conveniently detect whether there is gas leakage in the liquefied hydrocarbon storage tank 1, the following technical solution is provided.

[0036] The valve body 31 further includes a dangerous gas detector 71 and a displacement detector 72 , both of which are arranged on the valve body 31 .

[0037] The hazardous gas detector 71 is used to detect the concentration of hazardous gases in the environment surrounding the liquefied hydrocarbon storage tank 1 and to determine whether there is any gas leakage in the liquefied hydrocarbon storage tank 1. The displacement detector 72 is used to detect the advancement and withdrawal of the valve core 32 in the rapid water injection safety valve 3 and generate corresponding feedback signals.

[0038] In order to facilitate the control of the switching of the shut-off valve A22 and the shut-off valve B41 and provide redundancy in the operation mode, the following technical solution is provided.

[0039] The shut-off valve A22 is equipped with a handwheel A221 and a motor A222, and the shut-off valve B41 is equipped with a handwheel B411 and a motor B412.

[0040] Shutoff valve A22 can be driven by handwheel A221 and motor A222 to control its open / close state, while shutoff valve B41 can be driven by handwheel B411 and motor B412 to control its open / close state. Motors A222 and B412 are used to remotely control the open / close positions of shutoff valves A22 and B41. Handwheels A221 and B411 can be used to open and close shutoff valves A22 and B41 on-site, increasing control redundancy and ensuring safe system operation.

[0041] In order to achieve remote control and rapid response of the water injection system, the following technical solutions are provided.

[0042] It also includes a controller 8, which maintains signal connection with the pressure transmitter A23, the motor A222, the push part 33, the pressure transmitter B42, the motor B412, the hazardous gas detector 71, and the displacement detector 72 through a data line. The controller 8 is connected to the mobile terminal 9 through a wireless communication signal.

[0043] The controller 8 can receive data and signal feedback from the pressure transmitter A23, the pressure transmitter B42, the hazardous gas detector 71, and the displacement detector 72, and after analyzing and processing the data and signal feedback, it controls the operating status of the motor A222, the motor B412 and the pushing part 33 to control the connection and separation posture of the quick water injection safety valve 3 and quickly operate the switching status of the shut-off valve A22 and the shut-off valve B41.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A remote water injection system for a liquefied hydrocarbon storage tank (1), characterized by: It comprises a water injection pipe (2) for connecting to a liquefied hydrocarbon storage tank (1) and a quick water injection safety valve (3) connected to the end of the water injection pipe (2), and also comprises a one-way valve A (21), a shut-off valve A (22), and a pressure transmitter A (23) which are assembled on the water injection pipe (2) and arranged in sequence along the water flow direction; The quick water injection safety valve (3) is connected to the fire water supply pipeline (6) through a water connection pipe (4), and the water connection pipe (4) is equipped with a cut-off valve B (41) and a pressure transmitter B (42) arranged in sequence along the water flow direction; The water injection pipe (2) is connected to a backup water pipe (5), the backup water pipe (5) is connected to a backup water source via a water injection interface (51), the backup water pipe (5) is connected between the one-way valve A (21) and the shut-off valve A (22), and the backup water pipe (5) is equipped with a shut-off valve (52) and a one-way valve B (53) arranged in sequence along the water flow direction.

2. A remote water injection system for a liquefied hydrocarbon storage tank (1) according to claim 1, characterized in that: The rapid water injection safety valve (3) comprises a valve body (31), a valve core (32), and a push portion (33); the valve body (31) is equipped with an axial water receiving pipe (311) connected to the water injection pipe (2); the valve core (32) is slidably installed in the valve body (31) and docked with the axial water receiving pipe (311); the push portion (33) is fixedly installed in the valve body (31) and is dynamically connected to the valve core (32); and the valve core (32) is equipped with a radial water receiving pipe (321) that is connected to the water receiving pipe (4).

3. A remote water injection system for a liquefied hydrocarbon storage tank (1) according to claim 2, characterized in that: It also includes a dangerous gas detector (71) and a displacement detector (72), and the dangerous gas detector (71) and the displacement detector (72) are both arranged on the valve body (31).

4. A remote water injection system for a liquefied hydrocarbon storage tank (1) according to claim 3, characterized in that: The shut-off valve A (22) is equipped with a handwheel A (221) and a motor A (222), and the shut-off valve B (41) is equipped with a handwheel B (411) and a motor B (412).

5. A remote water injection system for a liquefied hydrocarbon storage tank (1) according to claim 1, characterized in that: The device further includes a controller (8), wherein the controller (8) maintains signal connections with the pressure transmitter A (23), the motor A (222), the pusher (33), the pressure transmitter B (42), the motor B (412), the dangerous gas detector (71), and the displacement detector (72) via data lines, and the controller (8) is connected to the mobile terminal (9) via wireless communication signals.

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