CN110626485B - Inerting method of ship methanol tank inerting system - Google Patents
Inerting method of ship methanol tank inerting system Download PDFInfo
- Publication number
- CN110626485B CN110626485B CN201911006191.1A CN201911006191A CN110626485B CN 110626485 B CN110626485 B CN 110626485B CN 201911006191 A CN201911006191 A CN 201911006191A CN 110626485 B CN110626485 B CN 110626485B
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- Prior art keywords
- oxygen concentration
- methanol
- valve
- methanol tank
- concentration sensor
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 276
- 238000000034 method Methods 0.000 title claims abstract description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000001301 oxygen Substances 0.000 claims abstract description 79
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 79
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 108010066057 cabin-1 Proteins 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention aims to provide a safe and reliable ship methanol tank inerting system and method with simple operation and management. The marine methanol tank inerting system comprises an input module, a methanol tank and an output module which are sequentially connected, wherein the marine methanol tank inerting system further comprises nitrogen supply equipment, a pressure reducing check valve, an electromagnetic valve and a stop check valve which are sequentially connected, the output end of the stop check valve is communicated with the methanol tank, a first oxygen concentration sensor which is electrically connected with the electromagnetic valve is arranged in the methanol tank, when the oxygen concentration in the methanol tank is larger than a preset value, the first oxygen concentration sensor feeds back an electric signal to enable the electromagnetic valve to be started, and a pressure vacuum valve is arranged on the methanol tank. The invention is applied to the technical field of inerting systems.
Description
Technical Field
The invention is applied to the technical field of inerting systems, and particularly relates to a ship methanol tank inerting system and a ship methanol tank inerting method.
Background
On a ship for transporting methanol or a ship using methanol as a fuel of a marine engine, because of the characteristics of low flash point, inflammability, explosiveness and the like of methanol, a great amount of safety precaution work must be done to prevent the tank containing methanol from exploding after entering air to reach the inflammable concentration, so that the methanol fuel tank needs to be inerted to prevent the increase of the oxygen concentration from reaching the inflammable explosion region.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a safe and reliable ship methanol tank inerting system and method with simple operation and management.
The technical scheme adopted by the invention is as follows: the marine methanol tank inerting system comprises an input module, a methanol tank and an output module which are sequentially connected, wherein the marine methanol tank inerting system further comprises nitrogen supply equipment, a pressure reducing check valve, an electromagnetic valve and a stop check valve which are sequentially connected, the output end of the stop check valve is communicated with the methanol tank, a first oxygen concentration sensor which is electrically connected with the electromagnetic valve is arranged in the methanol tank, when the oxygen concentration in the methanol tank is larger than a preset value, the first oxygen concentration sensor feeds back an electric signal to enable the electromagnetic valve to be started, and a pressure vacuum valve is arranged on the methanol tank.
As can be seen from the above, the pressure vacuum valve sucks the pressure in the air balance chamber when the pressure in the methanol chamber is reduced, and the nitrogen supply device is provided to supply inert gas to prevent the oxygen concentration from reaching the flammability limit. The first oxygen concentration sensor is arranged in the methanol cabin to detect the oxygen concentration, and when the concentration reaches a preset value, the electromagnetic valve is started to charge inert gas into the methanol cabin, so that the pressure in the methanol cabin is balanced and inertization is carried out. The automatic inerting is realized, manual operation is reduced, management is simpler, and meanwhile, safety and reliability can be ensured when no person is on duty through automatic detection.
In a preferred embodiment, the nitrogen supply device is a nitrogen generator or a nitrogen cylinder.
According to the scheme, the nitrogen making machine is suitable for inerting a methanol cabin of a large-sized ship, and the nitrogen cylinder is suitable for a small-sized ship.
In one preferred scheme, a second oxygen concentration sensor is further arranged in the methanol cabin, the preset value of the second oxygen concentration sensor is higher than that of the first oxygen concentration sensor, an audible and visual alarm is arranged outside the methanol cabin, the second oxygen concentration sensor is electrically connected with the audible and visual alarm, the ship methanol cabin cabinet inerting system further comprises a remote control stop valve, the output end of the nitrogen gas supply equipment is communicated with the remote control stop valve, the output end of the remote control stop valve is connected with a supply hose, the output end of the supply hose is provided with a first quick connector, and the input module and the output module are both provided with a second quick connector which is matched with the first quick connector.
According to the scheme, the alarm when the concentration of oxygen is too high is realized by setting the second oxygen concentration sensor, the condition that the concentration of oxygen in the methanol cabin is too high due to the fact that the electromagnetic valve cannot be started when the first oxygen concentration sensor fails is prevented, meanwhile, the remote control stop valve and the supply hose are set, the concentration of oxygen in the tank is reduced by manually charging nitrogen, and the safety of an inerting system is improved. Meanwhile, the manual nitrogen flushing is also applied to the primary use of the box body, filling, cabin sweeping and pipeline inerting.
Further preferably, the input module comprises an injection head, the injection head is communicated with the methanol cabin through an input pipeline, and the second quick connector is arranged between the injection head and the methanol cabin.
According to the scheme, the second quick connector is arranged at the input module to realize manual nitrogen charging inerting, and meanwhile, the oxygen concentration in the pipeline system is reduced through manual nitrogen charging when the tank body, the filling, the scavenging bin and the pipeline inerting are used for the first time.
In one preferred scheme, the output module comprises an output supply valve and an output pipeline which are arranged on the methanol cabin, the second quick connector is arranged on the output pipeline, and a third oxygen concentration sensor is further arranged inside the output pipeline.
According to the scheme, the third oxygen concentration sensor is arranged in the output pipeline to detect the oxygen concentration in the output methanol, and when the oxygen concentration reaches a preset value, an electric signal is fed back to the electromagnetic valve to charge nitrogen.
In a preferred embodiment, the output speed of the gas when the pressure vacuum valve is opened is 30m/s.
As can be seen from the above, the high velocity of the ejected gas prevents the flame from entering the methanol chamber.
In a preferred scheme, a stainless steel fireproof net is arranged at the vacuum end of the pressure vacuum valve.
According to the scheme, the stainless steel fireproof net is arranged to prevent flame from entering the methanol cabin along with the suction action of the pressure vacuum valve.
The inerting method comprises the following steps:
A. the pressure vacuum valve sucks external air in the process of extracting the methanol from the methanol cabin, the pressure reducing check valve and the stop check valve are opened in advance, an electric signal is fed back to the electromagnetic valve when the first oxygen concentration sensor or the third oxygen concentration sensor detects that the oxygen concentration is more than or equal to 8%, the electromagnetic valve is opened to enable nitrogen to be filled into the methanol cabin, air is sprayed out of the pressure vacuum valve, and the oxygen concentration in the methanol cabin is reduced;
B. closing the electromagnetic valve to stop nitrogen charging when the oxygen concentration is lower than 8%;
C. when the second oxygen concentration sensor detects that the oxygen concentration in the methanol cabin is greater than or equal to 10%, the second oxygen concentration sensor feeds back an electric signal to the audible and visual alarm to enable the audible and visual alarm to give an alarm, at the moment, the first oxygen concentration sensor or the third oxygen concentration sensor fails and cannot start the electromagnetic valve, the first quick connector is connected to the second quick connector of the input module manually, the remote control stop valve is opened to enable the oxygen concentration in the methanol cabin to enter the methanol cabin, and accordingly the oxygen concentration in the methanol cabin is reduced and overhauled by staff.
According to the scheme, the method ensures that the oxygen in the methanol cabin is kept in a low concentration state, and ensures the safety of fuel.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Description of the embodiments
As shown in fig. 1, in this embodiment, the present invention includes an input module, a methanol tank 1, and an output module that are sequentially connected, the marine methanol tank inerting system further includes a nitrogen gas supply device 2, a pressure reducing check valve 3, an electromagnetic valve 4, and a stop check valve 5 that are sequentially connected, an output end of the stop check valve 5 is communicated with the methanol tank 1, a first oxygen concentration sensor 6 that is electrically connected with the electromagnetic valve 4 is disposed in the methanol tank 1, and when the oxygen concentration in the methanol tank 1 is greater than a preset value, the first oxygen concentration sensor 6 feeds back an electrical signal to start the electromagnetic valve 4, and a pressure vacuum valve 7 is disposed on the methanol tank 1.
In this embodiment, the nitrogen gas supply apparatus 2 is a nitrogen generator or a nitrogen cylinder.
In this embodiment, a second oxygen concentration sensor 8 is further disposed in the methanol tank 1, a preset value of the second oxygen concentration sensor 8 is higher than that of the first oxygen concentration sensor 6, an audible-visual annunciator 9 is disposed outside the methanol tank 1, the second oxygen concentration sensor 8 is electrically connected with the audible-visual annunciator 9, the ship methanol tank inerting system further includes a remote control stop valve 10, an output end of the nitrogen gas supply device 2 is communicated with the remote control stop valve 10, an output end of the remote control stop valve 10 is connected with a supply hose 11, a first quick connector 12 is disposed at an output end of the supply hose 11, and a second quick connector 13 adapted to the first quick connector 12 is disposed on the input module and the output module.
In this embodiment, the input module comprises an injection head 14, the injection head 14 communicates with the methanol compartment 1 through an input pipe, and the second quick connector 13 is disposed between the injection head 14 and the methanol compartment 1.
In this embodiment, the output module includes an output supply valve 15 and an output pipe that are disposed on the methanol tank 1, the second quick connector 13 is disposed on the output pipe, and a third oxygen concentration sensor is further disposed inside the output pipe.
In this embodiment, the output speed of the gas when the pressure vacuum valve 7 is opened is 30m/s.
In this embodiment, the vacuum end of the pressure vacuum valve 7 is provided with a stainless steel fireproof net.
The inerting method comprises the following steps:
A. the pressure vacuum valve 7 sucks outside air in the process of extracting the methanol from the methanol tank 1, the pressure reducing check valve 3 and the stop check valve 5 are opened in advance, when the first oxygen concentration sensor 6 or the third oxygen concentration sensor detects that the oxygen concentration is more than or equal to 8%, an electric signal is fed back to the electromagnetic valve 4, the electromagnetic valve 4 is opened to enable nitrogen to be filled into the methanol tank 1, air is sprayed out from the pressure vacuum valve 7, and the oxygen concentration in the methanol tank 1 is reduced;
B. closing the electromagnetic valve 4 to stop nitrogen charging when the oxygen concentration is lower than 8%;
C. when the second oxygen concentration sensor 8 detects that the oxygen concentration in the methanol cabin 1 is greater than or equal to 10%, the second oxygen concentration sensor 8 feeds back an electric signal to the audible and visual alarm 9 to enable the audible and visual alarm 9 to give an alarm, at the moment, the electromagnetic valve 4 cannot be started when the first oxygen concentration sensor 6 or the third oxygen concentration sensor fails, the first quick connector 12 is connected to the second quick connector 13 of the input module manually, the remote control stop valve 10 is opened to enable the oxygen concentration in the methanol cabin 1 to enter from the input module, the oxygen concentration in the methanol cabin 1 is reduced by opening the remote control stop valve 10, and the operator overhauls the oxygen concentration, and when the audible and visual alarm 9 stops alarming, the remote control stop valve 10 is closed.
Claims (4)
1. An inerting method of a ship methanol tank inerting system, the ship methanol tank inerting system comprises an input module, a methanol tank (1) and an output module which are connected in sequence, and is characterized in that: the ship methanol tank inerting system further comprises a nitrogen supply device (2), a pressure reducing check valve (3), an electromagnetic valve (4) and a stop check valve (5) which are sequentially connected, wherein the output end of the stop check valve (5) is communicated with the methanol tank (1), a first oxygen concentration sensor (6) which is electrically connected with the electromagnetic valve (4) is arranged in the methanol tank (1), when the oxygen concentration in the methanol tank (1) is greater than a preset value, the first oxygen concentration sensor (6) feeds back an electric signal to enable the electromagnetic valve (4) to be started, and a pressure vacuum valve (7) is arranged on the methanol tank (1); the methanol tank (1) is internally provided with a second oxygen concentration sensor (8), the preset value of the second oxygen concentration sensor (8) is higher than that of the first oxygen concentration sensor (6), the outside of the methanol tank (1) is provided with an audible-visual annunciator (9), the second oxygen concentration sensor (8) is electrically connected with the audible-visual annunciator (9), the ship methanol tank inerting system further comprises a remote control stop valve (10), the output end of the nitrogen gas supply equipment (2) is communicated with the remote control stop valve (10), the output end of the remote control stop valve (10) is connected with a supply hose (11), the output end of the supply hose (11) is provided with a first quick connector (12), and the input module and the output module are provided with a second quick connector (13) which is matched with the first quick connector (12); the input module comprises an injection head (14), the injection head (14) is communicated with the methanol cabin (1) through an input pipeline, and the second quick connector (13) is arranged between the injection head (14) and the methanol cabin (1); the output module comprises an output supply valve (15) and an output pipeline which are arranged on the methanol cabin (1), the second quick connector (13) is arranged on the output pipeline, and a third oxygen concentration sensor is further arranged in the output pipeline;
the inerting method comprises the following steps:
A. in the process of extracting the methanol from the methanol cabin (1), the pressure vacuum valve (7) can suck external air, the pressure reducing check valve (3) and the stop check valve (5) are opened in advance, when the first oxygen concentration sensor (6) or the third oxygen concentration sensor detects that the oxygen concentration is greater than or equal to 8%, an electric signal is fed back to the electromagnetic valve (4), the electromagnetic valve (4) is opened to enable nitrogen to be filled into the methanol cabin (1), air is sprayed out from the pressure vacuum valve (7), and the oxygen concentration in the methanol cabin (1) is reduced;
B. when the oxygen concentration is lower than 8%, the electromagnetic valve (4) is closed to stop nitrogen charging;
C. when the second oxygen concentration sensor (8) detects that the oxygen concentration in the methanol cabin (1) is more than or equal to 10%, the second oxygen concentration sensor (8) feeds back an electric signal to the audible and visual alarm (9) to enable the audible and visual alarm to give an alarm, at the moment, the first oxygen concentration sensor (6) or the third oxygen concentration sensor cannot be started to the electromagnetic valve (4), the first quick connector (12) is connected to the second quick connector (13) of the input module manually, the remote control stop valve (10) is opened to enable the oxygen to enter the methanol cabin (1) from the input module, the oxygen concentration in the methanol cabin (1) is reduced in a similar way, and the operator overhauls the oxygen concentration.
2. A method for inerting a methanol tank inerting system of a marine vessel according to claim 1, wherein: the nitrogen supply device (2) is a nitrogen generator or a nitrogen cylinder.
3. A method for inerting a methanol tank inerting system of a marine vessel according to claim 1, wherein: the output speed of the gas is 30m/s when the pressure vacuum valve (7) is opened.
4. A method for inerting a methanol tank inerting system of a marine vessel according to claim 1, wherein: the vacuum end of the pressure vacuum valve (7) is provided with a stainless steel fireproof net.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911006191.1A CN110626485B (en) | 2019-10-22 | 2019-10-22 | Inerting method of ship methanol tank inerting system |
| PCT/CN2020/122838 WO2021078194A1 (en) | 2019-10-22 | 2020-10-22 | Inerting system and method for methanol tank of ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911006191.1A CN110626485B (en) | 2019-10-22 | 2019-10-22 | Inerting method of ship methanol tank inerting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110626485A CN110626485A (en) | 2019-12-31 |
| CN110626485B true CN110626485B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911006191.1A Active CN110626485B (en) | 2019-10-22 | 2019-10-22 | Inerting method of ship methanol tank inerting system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110626485B (en) |
| WO (1) | WO2021078194A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110626485B (en) * | 2019-10-22 | 2024-01-09 | 江龙船艇科技股份有限公司 | Inerting method of ship methanol tank inerting system |
| CN111746724A (en) * | 2020-06-29 | 2020-10-09 | 沪东中华造船(集团)有限公司 | Method for replacing nitrogen and dry air in isolation empty cabin of cargo hold of chemical ship |
| CN113264152B (en) * | 2021-06-22 | 2023-02-07 | 广船国际有限公司 | Pipeline arrangement device, ship and pipeline control method |
| CN113291446B (en) * | 2021-06-29 | 2022-04-19 | 广船国际有限公司 | Supply system of methanol dual-fuel ship daily cabinet and use method thereof |
| CN114889796B (en) * | 2022-05-13 | 2024-03-19 | 友联船厂（蛇口）有限公司 | Inerting control system and method for fuel pipeline |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2021078194A1 (en) | 2021-04-29 |
| CN110626485A (en) | 2019-12-31 |
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Address after: 528462 Guangdong Province, Zhongshan city of God Bay Road No. 1 Makino Jianglong boat Technology Park Applicant after: JIANGLONG SHIPBUILDING Co.,Ltd. Address before: 528462 Guangdong Province, Zhongshan city of God bay No. 1 Lu Makino Jianglong boat Technology Park Applicant before: JIANGLONG SHIPBUILDING Co.,Ltd. |
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