CN110626485A - Inerting system and method for methanol cabin cabinet of ship - Google Patents
Inerting system and method for methanol cabin cabinet of ship Download PDFInfo
- Publication number
- CN110626485A CN110626485A CN201911006191.1A CN201911006191A CN110626485A CN 110626485 A CN110626485 A CN 110626485A CN 201911006191 A CN201911006191 A CN 201911006191A CN 110626485 A CN110626485 A CN 110626485A
- Authority
- CN
- China
- Prior art keywords
- methanol
- oxygen concentration
- cabin
- valve
- concentration sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 270
- 238000000034 method Methods 0.000 title claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000001301 oxygen Substances 0.000 claims abstract description 74
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 74
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000006837 decompression Effects 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
- 238000005086 pumping Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 108010066057 cabin-1 Proteins 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000012423 maintenance 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
Abstract
The invention aims to provide a safe and reliable inerting system and method for a methanol cabin cabinet of a ship, which are simple to operate and manage. The inerting system comprises an input module, a methanol cabin and an output module which are sequentially connected, and further comprises nitrogen supply equipment, a pressure reduction check valve, an electromagnetic valve and a stop check valve which are sequentially connected, wherein the output end of the stop check valve is communicated with the methanol cabin, a first oxygen concentration sensor electrically connected with the electromagnetic valve is arranged in the methanol cabin, when the oxygen concentration in the methanol cabin is greater than a preset value, the electromagnetic valve is started by the aid of an electric signal fed back by the first oxygen concentration sensor, and a pressure vacuum valve is arranged on the methanol cabin. 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 an inerting system and method for a methanol cabin cabinet of a ship.
Background
On ships for transporting methanol or ships using methanol as a fuel for marine engines, due to the characteristics of low flash point, flammability, explosiveness and the like of methanol, a full safety precaution work must be done to prevent a tank containing methanol from exploding after entering air reaches a flammable concentration, and therefore, a methanol fuel tank needs to be inerted to prevent an increase in oxygen concentration from reaching a flammable interval.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for inerting a methanol tank cabinet of a ship, which are safe, reliable and simple to operate and manage.
The technical scheme adopted by the invention is as follows: the inerting system comprises an input module, a methanol cabin and an output module which are sequentially connected, and further comprises nitrogen supply equipment, a pressure reduction check valve, an electromagnetic valve and a stop check valve which are sequentially connected, wherein the output end of the stop check valve is communicated with the methanol cabin, a first oxygen concentration sensor electrically connected with the electromagnetic valve is arranged in the methanol cabin, when the oxygen concentration in the methanol cabin is greater than a preset value, the electromagnetic valve is started by the aid of an electric signal fed back by the first oxygen concentration sensor, and a pressure vacuum valve is arranged on the methanol cabin.
According to the scheme, when the pressure in the methanol cabin is reduced, the pressure vacuum valve can suck air to balance the pressure in the cabin, and the nitrogen supply device is arranged to provide inert gas to prevent the oxygen concentration from reaching the flammable 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 fill inert gas into the methanol cabin, balance the pressure in the methanol cabin and perform inerting. Automatic inerting is realized, manual operation is reduced, management is simpler, and meanwhile, safety and reliability can be still guaranteed when people are unattended through automatic detection.
Preferably, the nitrogen supply device is a nitrogen generator or a nitrogen cylinder.
According to the scheme, the nitrogen making machine is suitable for inerting the methanol tank of a large ship, and the nitrogen cylinder is suitable for being used by a small ship.
According to a preferable 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 acousto-optic alarm is arranged outside the methanol cabin, the second oxygen concentration sensor is electrically connected with the acousto-optic alarm, the ship methanol cabin cabinet inerting system further comprises a remote control stop valve, the output end of the nitrogen supply device 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 second quick connectors matched with the first quick connectors.
According to the scheme, the alarm when the oxygen concentration is too high is realized by arranging the second oxygen concentration sensor, the situation that the oxygen concentration in the methanol cabin is too high due to the fact that the first oxygen concentration sensor fails to start the electromagnetic valve is prevented from occurring, meanwhile, the remote control stop valve and the supply hose are arranged to realize manual nitrogen filling to reduce the oxygen concentration in the tank, and the safety of the inerting system is improved. Meanwhile, the manual nitrogen flushing is also applied to the initial use of the tank body, filling, cabin sweeping and pipeline inerting.
Further preferred scheme is, the input module includes the filling head, the filling head passes through the input pipeline with the methyl alcohol cabin communicates, the second quick-operation joint sets up between filling head and the methyl alcohol cabin.
According to the scheme, the second quick coupling is arranged at the input module to realize manual nitrogen charging inerting, and meanwhile, when the box body is used for the first time, filling, sweeping and pipeline inerting are carried out, the manual nitrogen charging is carried out to reduce the oxygen concentration in the pipeline system.
Preferably, 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 arranged in 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.
Preferably, the output speed of the gas when the pressure vacuum valve is opened is 30 m/s.
According to the scheme, the gas sprayed at high speed can prevent flame from entering the methanol cabin.
Preferably, the vacuum end of the pressure vacuum valve is provided with a stainless steel fireproof net.
According to the scheme, the stainless steel fireproof net is arranged to prevent flame from entering the methanol cabin along with the air suction action of the pressure vacuum valve.
The inerting method comprises the following steps:
A. the pressure vacuum valve can suck outside air in the process of pumping the methanol out of the methanol cabin, the decompression check valve and the stop check valve are opened in advance, when the first oxygen concentration sensor 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, 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. when the oxygen concentration is lower than 8%, the electromagnetic valve is closed to stop nitrogen charging;
C. when the second oxygen concentration sensor detects the inside oxygen concentration in methyl alcohol cabin is more than or equal to 10%, second oxygen concentration sensor feedback signal of telecommunication gives the acousto-optic siren makes it send out the police dispatch newspaper, first oxygen concentration sensor this moment or the malfunctioning unable start-up of third oxygen concentration sensor the solenoid valve will by the manual work first quick-operation joint is connected to input module on the quick-operation joint of second, through opening the remote control stop valve makes to follow enter in the input module the methyl alcohol cabin, reduces on the same way the oxygen concentration in the methyl alcohol cabin to overhaul by the staff.
According to the scheme, the oxygen in the methanol cabin is ensured to be kept in a low-concentration state through the method, and the safety of the fuel is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in fig. 1, in this embodiment, the inerting system of the methanol tank of the ship comprises an input module, a methanol tank 1 and an output module which are connected in sequence, the inerting system of the methanol tank of the ship 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 connected in sequence, an output end of the stop check valve 5 is communicated with the methanol tank 1, a first oxygen concentration sensor 6 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 electromagnetic valve 4 is started by the feedback of an electric signal of the first oxygen concentration sensor 6, and a pressure vacuum valve 7 is arranged on the methanol tank 1.
In the present embodiment, the nitrogen gas supply apparatus 2 is a nitrogen generator or a nitrogen gas 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 and visual alarm 9 is disposed outside the methanol tank 1, the second oxygen concentration sensor 8 is electrically connected to the audible and visual alarm 9, the ship methanol tank inerting system further includes a remote control stop valve 10, an output end of the nitrogen supply device 2 is communicated with the remote control stop valve 10, an output end of the remote control stop valve 10 is connected to a supply hose 11, an output end of the supply hose 11 is provided with a first quick coupling 12, and the input module and the output module are both provided with a second quick coupling 13 adapted to the first quick coupling 12.
In this embodiment, the input module comprises an injection head 14, the injection head 14 is communicated with the methanol tank 1 through an input pipeline, and the second quick coupling 13 is arranged between the injection head 14 and the methanol tank 1.
In this embodiment, the output module includes an output supply valve 15 and an output pipeline disposed on the methanol tank 1, the second quick connector 13 is disposed on the output pipeline, and a third oxygen concentration sensor is further disposed inside the output pipeline.
In this embodiment, the output speed of the gas when the pressure vacuum valve 7 is opened is 30 m/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 in outside air in the process of pumping out methanol from the methanol cabin 1, the decompression 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 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 sound-light alarm 9 to make the sound-light alarm 9 give an alarm, at the moment, the first oxygen concentration sensor 6 or the third oxygen concentration sensor fails to start the electromagnetic valve 4, the first quick coupling 12 is connected to the input module on the second quick coupling 13 by the manual work, the remote control stop valve 10 is opened to enable the methanol cabin 1 to enter from the input module, the oxygen concentration in the methanol cabin 1 is reduced by the same principle, the maintenance is carried out by a worker, and the remote control stop valve 10 is closed when the sound-light alarm 9 stops the alarm.
Claims (8)
1. The utility model provides a boats and ships methyl alcohol cabin cabinet inerting system, includes input module, methyl alcohol cabin (1) and the output module who connects gradually, its characterized in that: the inerting system for the ship methanol cabin cabinet further comprises a nitrogen supply device (2), a decompression check valve (3), an electromagnetic valve (4) and a stop check valve (5), wherein the nitrogen supply device, the decompression check valve (3), the electromagnetic valve (4) and the stop check valve (5) are sequentially connected, an output end of the stop check valve (5) is communicated with the methanol cabin (1), a first oxygen concentration sensor (6) electrically connected with the electromagnetic valve (4) is arranged in the methanol cabin (1), when the oxygen concentration in the methanol cabin (1) is greater than a preset value, the electromagnetic valve (4) is started by feeding back an electric signal from the first oxygen concentration sensor (6), and a pressure vacuum valve (7) is arranged on the methanol cabin (1).
2. The inerting system for methanol tanks of ships according to claim 1, characterized in that: the nitrogen supply equipment (2) is a nitrogen making machine or a nitrogen bottle.
3. The inerting system for methanol tanks of ships according to claim 1, characterized in that: a second oxygen concentration sensor (8) is also arranged in the methanol cabin (1), the preset value of the second oxygen concentration sensor (8) is higher than that of the first oxygen concentration sensor (6), an acousto-optic alarm (9) is arranged outside the methanol cabin (1), the second oxygen concentration sensor (8) is electrically connected with the acousto-optic alarm (9), the inerting system for the methanol tank cabinet of the ship further comprises a remote control stop valve (10), the output end of the nitrogen supply device (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 both provided with second quick connectors (13) matched with the first quick connectors (12).
4. The inerting system for methanol tanks of ships according to claim 3, characterized in that: 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 joint (13) is arranged between the injection head (14) and the methanol cabin (1).
5. The inerting system for methanol tanks of ships according to claim 4, characterized in that: the output module comprises an output supply valve (15) and an output pipeline, the output supply valve is 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 inside the output pipeline.
6. The inerting system for methanol tanks of ships according to claim 1, characterized in that: the output speed of the gas is 30m/s when the pressure vacuum valve (7) is opened.
7. The inerting system for methanol tanks of ships according to claim 1, characterized in that: and a stainless steel fireproof net is arranged at the vacuum end of the pressure vacuum valve (7).
8. An inerting method for an inerting system of a methanol tank cabinet of a ship based on claim 5 is characterized by comprising the following steps:
A. the pressure vacuum valve (7) can suck external air in the process of pumping out methanol from the methanol cabin (1), the decompression 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 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 second oxygen concentration sensor (8) detect when methanol cabin (1) inside oxygen concentration is greater than or equal to 10%, second oxygen concentration sensor (8) feedback signal of telecommunication give acousto-optic siren (9) make it send out the police dispatch newspaper, this moment first oxygen concentration sensor (6) or the malfunctioning unable start-up of third oxygen concentration sensor solenoid valve (4), will by the manual work first quick-operation joint (12) are connected to input module on second quick-operation joint (13), through opening remote control stop valve (10) make follow enter in the input module methanol cabin (1), reduce in the same reason oxygen concentration in methanol cabin (1) to overhaul by the staff.
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 true CN110626485A (en) | 2019-12-31 |
| CN110626485B CN110626485B (en) | 2024-01-09 |
Family
ID=68977127
Family Applications (1)
| 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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2021078194A1 (en) * | 2019-10-22 | 2021-04-29 | 江龙船艇科技股份有限公司 | Inerting system and method for methanol tank of ship |
| CN113264152A (en) * | 2021-06-22 | 2021-08-17 | 广船国际有限公司 | Pipeline arrangement device, ship and pipeline control method |
| CN113291446A (en) * | 2021-06-29 | 2021-08-24 | 广船国际有限公司 | Supply system of methanol dual-fuel ship daily cabinet and use method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021078194A1 (en) * | 2019-10-22 | 2021-04-29 | 江龙船艇科技股份有限公司 | Inerting system and method for methanol tank of ship |
| 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 |
| CN113264152A (en) * | 2021-06-22 | 2021-08-17 | 广船国际有限公司 | Pipeline arrangement device, ship and pipeline control method |
| CN113291446A (en) * | 2021-06-29 | 2021-08-24 | 广船国际有限公司 | Supply system of methanol dual-fuel ship daily cabinet and use method thereof |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110626485B (en) | 2024-01-09 |
| WO2021078194A1 (en) | 2021-04-29 |
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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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