Inerting and pipeline purging system for methanol cabin of methanol-powered ship

Abstract

The utility model relates to an inerting and pipeline purging system for a methanol cabin of a methanol-powered ship, which comprises a gas source and a nitrogen header pipe, the gas source is communicated with the nitrogen header pipe, the nitrogen header pipe is communicated with a first stop valve, the first stop valve is communicated with a first pressure reducing valve, a first safety valve is arranged at an outlet of the first pressure reducing valve, and a second safety valve is arranged at an outlet of the first pressure reducing valve. The nitrogen header pipe is provided with a first pressure transmitter and an oxygen detector, the nitrogen header pipe is communicated with a first nitrogen branch pipe, the first nitrogen branch pipe is communicated with a second stop valve, the second stop valve is communicated with a second pressure reducing valve, an outlet of the second pressure reducing valve is provided with a second safety valve, the second safety valve is communicated with a first DBB valve, and the second DBB valve is communicated with a second pressure reducing valve. And the first DBB valve is communicated with the first electromagnetic valve. The utility model not only solves the problems of complicated operation, easy error and unsafe system configuration of the current system, but also reduces the energy consumption and environmental pollution, and improves the safety and operation efficiency of the system.

Description

Technical Field

[0001] The utility model relates to the technical field of clean energy for ships, in particular to an inerting and pipeline purging system for a methanol tank of a methanol-powered ship. Background Art

[0002] With the improvement of environmental awareness and the development of new energy technologies, methanol has been widely used as a clean alternative fuel in the shipping field. However, the flammable and explosive properties of methanol make methanol-powered ships have great safety risks during operation. Especially in the inerting of methanol tanks and the purging of pipelines, how to effectively perform inerting and purging operations to prevent methanol leakage and accumulation has become a technical problem that needs to be solved urgently.

[0003] At present, the inerting and pipeline purging of methanol tanks on the market have the following main shortcomings: first, they mainly rely on the operation of manual valves to open and close, which makes the operation inconvenient and error-prone for on-site workers; second, the operation is complicated and the maintenance cost is high. Utility Model Content

[0004] In view of the above problems, the present invention provides an inerting and pipeline purging system for the methanol tank of a methanol-powered ship, which not only solves the problems of cumbersome operation, easy error and unsafe system configuration of the current system, but also reduces energy consumption and environmental pollution, and improves the safety and operating efficiency of the system.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is as follows:

[0006] An inerting and pipeline purging system for a methanol tank of a methanol-powered ship comprises an air source and a nitrogen main pipe, wherein the air source is communicated with the nitrogen main pipe, the nitrogen main pipe is communicated with a first stop valve, the first stop valve is communicated with a first pressure reducing valve, a first safety valve is arranged at the outlet of the first pressure reducing valve, a first pressure transmitter and an oxygen detector are arranged on the nitrogen main pipe, the nitrogen main pipe is communicated with a first nitrogen branch pipe, the first nitrogen branch pipe is communicated with a second stop valve, the second stop valve is communicated with a second pressure reducing valve, a second safety valve is arranged at the outlet of the second pressure reducing valve, the second safety valve is communicated with a first DBB valve, the first DBB valve is communicated with a first solenoid valve, the first solenoid valve is communicated with a first stop check valve, the first stop check valve is connected to a methanol tank inerting interface, the first DBB valve is communicated with a second solenoid valve, the second solenoid valve is communicated with a second stop check valve, and the second stop check valve is connected to an inerting interface of a methanol collection cabinet.

[0007] Preferably, the nitrogen main pipe is connected to the second nitrogen branch pipe, the second nitrogen branch pipe is connected to the third stop valve, the third stop valve is connected to the third pressure reducing valve, a third safety valve is provided at the outlet of the third pressure reducing valve, the third safety valve is connected to the second DBB valve, the second DBB valve is connected to the third solenoid valve, the third solenoid valve is connected to the third stop check valve, and the third stop check valve is connected to the purge interface of the first methanol supply unit.

[0008] Preferably, the second DBB valve is communicated with a fourth solenoid valve, the fourth solenoid valve is communicated with a fourth stop check valve, and the fourth stop check valve is connected to a purge interface of a second methanol supply unit.

[0009] Preferably, the second DBB valve is communicated with the fifth solenoid valve, the fifth solenoid valve is communicated with the fifth stop check valve, and the fifth stop check valve is connected to the purge interface of the third methanol supply unit.

[0010] Preferably, the second DBB valve is communicated with the sixth solenoid valve, the sixth solenoid valve is communicated with the sixth stop check valve, and the sixth stop check valve is connected to the nitrogen sealing port of the first double-walled pipe.

[0011] Preferably, the second DBB valve is communicated with the seventh solenoid valve, the seventh solenoid valve is communicated with the seventh stop check valve, and the seventh stop check valve is connected to the nitrogen sealing port of the second double-walled pipe.

[0012] Preferably, a third pressure transmitter is provided between the third pressure reducing valve and the third safety valve.

[0013] Preferably, a second pressure transmitter is provided between the second pressure reducing valve and the second safety valve.

[0014] Preferably, the second DBB valve is connected to the nitrogen purge interface of the filling station.

[0015] The utility model has the following positive effects:

[0016] 1. The utility model uses a DBB valve (double-off and double-blow valve) to effectively shut off the pipeline and drain the methanol that is easily accumulated in the pipeline section to avoid the subsequent methanol gasification causing the pipeline pressure to rise. A solenoid valve is used at the end of the cabin inerting or pipeline purging, which is associated with the control system and is convenient and easy to operate. A safety valve is configured after the pressure reducing valve. If the pressure reducing valve is damaged, the safety valve will trip to discharge the overpressure gas after the pressure reducing valve to avoid causing safety hazards. An oxygen detector is arranged in the nitrogen main pipe and is connected to the control system. When the oxygen concentration exceeds the standard (higher than 5%), an alarm is issued to facilitate timely detection of methanol leakage or pipeline damage. A first pressure transmitter is arranged in the nitrogen main pipe to facilitate detection of the pressure value after each section of the pressure reducing valve.

[0017] 2. The utility model optimizes the existing technology, realizes the safe inerting of the methanol tank and the efficient purging of the pipeline, effectively avoids the safety risks caused by methanol leakage and accumulation, and has a simple process and is easy to operate, which reduces energy consumption and environmental pollution and improves the safety and operating efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Explanation of the numbers in the figure: 1-gas source, 2-first stop valve, 3-nitrogen main pipe, 4-first pressure reducing valve, 5-second pressure reducing valve, 6-third pressure reducing valve, 7-first pressure transmitter, 8-second pressure transmitter, 9-third pressure transmitter, 10-oxygen detector, 11-first DBB valve, 12-second DBB valve, 13-second stop valve, 14-third stop valve, 15-first solenoid valve, 16-second solenoid valve, 17-third solenoid valve, 18-fourth solenoid valve, 19-fifth solenoid valve, 20-sixth solenoid valve, 21-seventh solenoid valve, 22-first stop check valve, 23-second stop check valve , 24-the third stop check valve, 25-the fourth stop check valve, 26-the fifth stop check valve, 27-the sixth stop check valve, 28-the seventh stop check valve, 29-methanol tank inerting interface, 30-methanol collection cabinet inerting interface, 31-the first methanol supply unit purge interface, 32-the second methanol supply unit purge interface, 33-the third methanol supply unit purge interface, 34-the first double-wall pipe nitrogen sealing port, 35-the second double-wall pipe nitrogen sealing port, 36-filling station nitrogen purge interface, 37-the first safety valve, 38-the second safety valve, 39-the third safety valve, 40-the first nitrogen branch pipe, 41-the second nitrogen branch pipe. DETAILED DESCRIPTION

[0020] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0021] Example: Figure 1As shown, an inerting and pipeline purging system for a methanol tank of a methanol-powered ship comprises an air source 1 and a nitrogen main pipe 3, wherein the air source 1 is in communication with the nitrogen main pipe 3, the nitrogen main pipe 3 is in communication with a first stop valve 2, the first stop valve 2 is in communication with a first pressure reducing valve 4, a first safety valve 37 is provided at the outlet of the first pressure reducing valve 4, a first pressure transmitter 7 and an oxygen detector 10 are provided on the nitrogen main pipe 3, the nitrogen main pipe 3 is in communication with a first nitrogen branch pipe 40, the first nitrogen branch pipe 40 is in communication with a second stop valve 13, the second stop valve 13 is in communication with The second pressure reducing valve 5 is connected, and a second safety valve 38 is provided at the outlet of the second pressure reducing valve 5. The second safety valve 38 is connected to the first DBB valve 11, the first DBB valve 11 is connected to the first solenoid valve 15, the first solenoid valve 15 is connected to the first stop check valve 22, the first stop check valve 22 is connected to the methanol tank inerting interface 29, the first DBB valve 11 is connected to the second solenoid valve 16, the second solenoid valve 16 is connected to the second stop check valve 23, and the second stop check valve 23 is connected to the methanol collection cabinet inerting interface 30.

[0022] In this embodiment, the nitrogen main pipe 3 is connected to the second nitrogen branch pipe 41, the second nitrogen branch pipe 41 is connected to the third stop valve 14, the third stop valve 14 is connected to the third pressure reducing valve 6, and a third safety valve 39 is provided at the outlet of the third pressure reducing valve 6, the third safety valve 39 is connected to the second DBB valve 12, the second DBB valve 12 is connected to the third solenoid valve 17, the third solenoid valve 17 is connected to the third stop check valve 24, and the third stop check valve 24 is connected to the first methanol supply unit purge interface 31.

[0023] In this embodiment, the second DBB valve 12 is communicated with the fourth solenoid valve 18 , the fourth solenoid valve 18 is communicated with the fourth stop check valve 25 , and the fourth stop check valve 25 is connected to the second methanol supply unit purge interface 32 .

[0024] In this embodiment, the second DBB valve 12 is communicated with the fifth solenoid valve 19 , the fifth solenoid valve 19 is communicated with the fifth stop check valve 26 , and the fifth stop check valve 26 is connected to the third methanol supply unit purge interface 33 .

[0025] In this embodiment, the second DBB valve 12 is communicated with the sixth solenoid valve 20 , the sixth solenoid valve 20 is communicated with the sixth stop check valve 27 , and the sixth stop check valve 27 is connected to the first double-walled pipe nitrogen sealing port 34 .

[0026] In this embodiment, the second DBB valve 12 is communicated with the seventh solenoid valve 21 , the seventh solenoid valve 21 is communicated with the seventh stop check valve 28 , and the seventh stop check valve 28 is connected to the second double-walled pipe nitrogen sealing port 35 .

[0027] In this embodiment, a third pressure transmitter 9 is provided between the third pressure reducing valve 6 and the third safety valve 39 .

[0028] In this embodiment, a second pressure transmitter 8 is provided between the second pressure reducing valve 5 and the second safety valve 38 .

[0029] In this embodiment, the second DBB valve 12 is connected to the nitrogen purge interface 36 of the filling station.

[0030] In this embodiment, whether the gas source is a nitrogen cylinder group or a nitrogen generating device, it can be applied to this system, and it is only necessary to reasonably increase the number of pressure reducing valves 3. A safety valve is configured after the pressure reducing valve. If the pressure reducing valve is damaged, the safety valve will trip and discharge the overpressure gas after the pressure reducing valve to avoid safety hazards.

[0031] DBB valves (double-blocking and double-blowout valves) are used in the pipeline to effectively shut off the pipeline and drain the methanol that is easily accumulated in the pipeline section.

[0032] When cabin inerting is required, operate the DBB valve (double-off and double-blow valve) to the open position; when the cabin inerting is completed or maintenance is required, operate the DBB valve (double-off and double-blow valve) to the release position to discharge the methanol that is easily accumulated in the pipeline to avoid the subsequent methanol gasification causing the pipeline pressure to increase.

[0033] When pipeline purging is required, operate the DBB valve (double-off and double-blow valve) to the open position; when pipeline purging is completed or maintenance is required, operate the DBB valve (double-off and double-blow valve) to the release position to discharge methanol that is easily accumulated in the pipeline to avoid subsequent methanol gasification causing an increase in pipeline pressure.

[0034] In this embodiment, the nitrogen from the nitrogen cylinder group or nitrogen generator is reduced to 1MPa after flowing through the first pressure reducing valve and is divided into two routes. One route is reduced to 15-20KPa for inerting the methanol tank and the methanol collection cabinet; the other route is reduced to 0.6-0.8 MPa and goes to the nitrogen purge port of the methanol supply unit, the double-wall pipe nitrogen sealing interface, the nitrogen purge interface of the filling station, etc. This effectively solves the problem of different requirements for nitrogen pressure for cabin inerting or pipeline inerting on board.

[0035] When inerting or purging is required, the DBB valve (double-off and double-blow valve) is in the open position. After the inerting or purging of the methanol tank and methanol collection is completed, the DBB valve (double-off and double-blow valve) is in the release position to release the methanol gas that is easily accumulated in the pipeline, effectively avoiding the risk of subsequent pipeline pressure increase.

[0036] The working principle of the utility model is as follows: the nitrogen from the nitrogen cylinder group or the nitrogen generating device is reduced to 1MPa after flowing through the stop valve and the first pressure reducing valve; a safety valve, a pressure sensor and an oxygen detector are arranged at the outlet of the pressure reducing valve, and the nitrogen is divided into two routes, namely the first nitrogen branch pipe and the second nitrogen branch pipe.

[0037] The first nitrogen branch pipe is used for cabin inerting: through the second stop valve, the outlet is connected to the second pressure reducing valve, and the pressure is reduced to 15-20KPa. The outlet of the second pressure reducing valve is connected to the second pressure transmitter, the safety valve, and the second DBB valve through a pipeline, and then divided into two routes, one of which is used for the inerting of the methanol tank through the solenoid valve and the stop check valve; the other is used for the inerting of the methanol collection cabinet through the solenoid valve and the stop check valve.

[0038] The second nitrogen branch pipe is used for pipeline purging: through the third stop valve, the outlet is connected to the third pressure reducing valve, and the pressure is reduced to 0.6-0.8 MPa. The outlet of the third pressure reducing valve is connected to the third pressure transmitter, the safety valve, and the second DBB valve through a pipeline, and then divided into 3 branches, which go to the nitrogen purge port of the methanol supply unit, the double-wall pipe nitrogen sealing interface, the nitrogen purge interface of the filling station, etc.

[0039] In summary, the utility model not only solves the problems of the current system being complicated to operate, prone to errors, and having an insecure system configuration, but also reduces energy consumption and environmental pollution, and improves the safety and operating efficiency of the system.

[0040] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An inerting and pipeline purging system for a methanol tank of a methanol-powered ship, comprising an air source (1) and a nitrogen main pipe (3), wherein the air source (1) is connected to the nitrogen main pipe (3), and is characterized in that: The nitrogen main pipe (3) is in communication with the first stop valve (2), the first stop valve (2) is in communication with the first pressure reducing valve (4), a first safety valve (37) is provided at the outlet of the first pressure reducing valve (4), a first pressure transmitter (7) and an oxygen detector (10) are provided on the nitrogen main pipe (3), the nitrogen main pipe (3) is in communication with the first nitrogen branch pipe (40), the first nitrogen branch pipe (40) is in communication with the second stop valve (13), the second stop valve (13) is in communication with the second pressure reducing valve (5), a second safety valve (37) is provided at the outlet of the second pressure reducing valve (5), The second safety valve (38) is connected to the first DBB valve (11), the first DBB valve (11) is connected to the first solenoid valve (15), the first solenoid valve (15) is connected to the first stop check valve (22), the first stop check valve (22) is connected to the methanol tank inerting interface (29), the first DBB valve (11) is connected to the second solenoid valve (16), the second solenoid valve (16) is connected to the second stop check valve (23), and the second stop check valve (23) is connected to the methanol collection cabinet inerting interface (30).

2. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 1 is characterized in that: The nitrogen main pipe (3) is in communication with the second nitrogen branch pipe (41), the second nitrogen branch pipe (41) is in communication with the third stop valve (14), the third stop valve (14) is in communication with the third pressure reducing valve (6), a third safety valve (39) is provided at the outlet of the third pressure reducing valve (6), the third safety valve (39) is in communication with the second DBB valve (12), the second DBB valve (12) is in communication with the third solenoid valve (17), the third solenoid valve (17) is in communication with the third stop check valve (24), and the third stop check valve (24) is connected to the first methanol supply unit purge interface (31).

3. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 2 is characterized in that: The second DBB valve (12) is in communication with a fourth solenoid valve (18), the fourth solenoid valve (18) is in communication with a fourth stop check valve (25), and the fourth stop check valve (25) is connected to a second methanol supply unit purge interface (32).

4. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 2, characterized in that: The second DBB valve (12) is in communication with a fifth solenoid valve (19), the fifth solenoid valve (19) is in communication with a fifth stop check valve (26), and the fifth stop check valve (26) is connected to a third methanol supply unit purge interface (33).

5. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 2, characterized in that: The second DBB valve (12) is in communication with a sixth solenoid valve (20), the sixth solenoid valve (20) is in communication with a sixth stop check valve (27), and the sixth stop check valve (27) is connected to the first double-walled pipe nitrogen sealing port (34).

6. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 2, characterized in that: The second DBB valve (12) is in communication with a seventh solenoid valve (21), the seventh solenoid valve (21) is in communication with a seventh stop check valve (28), and the seventh stop check valve (28) is connected to a second double-walled pipe nitrogen sealing port (35).

7. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 2, characterized in that: A third pressure transmitter is provided between the third pressure reducing valve (6) and the third safety valve (39).

8. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 1, characterized in that: A second pressure transmitter (8) is provided between the second pressure reducing valve (5) and the second safety valve (38).

9. The inerting and pipeline purging system for the methanol tank of a methanol-powered ship according to claim 2, characterized in that: The second DBB valve (12) is connected to the nitrogen purge interface (36) of the filling station.

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