CN111609313A - Gas double-wall pipe drainage system - Google Patents
Gas double-wall pipe drainage system Download PDFInfo
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- CN111609313A CN111609313A CN202010303976.1A CN202010303976A CN111609313A CN 111609313 A CN111609313 A CN 111609313A CN 202010303976 A CN202010303976 A CN 202010303976A CN 111609313 A CN111609313 A CN 111609313A
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- pipe
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- tank
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a gas double-wall pipe drainage system, which comprises a gas double-wall pipe, a discharge pipe and a discharge tank, wherein the gas double-wall pipe comprises an outer pipe and an inner pipe; a discharge pipe is connected to the lowest point of each bent pipe body of the outer pipe; and the connecting pipe sections of the outer pipe and each discharge pipe are provided with combustible gas detection devices; the water outlet of the discharge pipe is connected with the water inlet of the discharge tank; a first stop valve for controlling the opening or closing of the water inlet of the discharge tank is arranged at the water inlet of the discharge tank in a matched manner; the bottom of the discharge tank is provided with a discharge port, and the discharge port is provided with a second stop valve used for controlling the discharge port to be opened or closed in a matching manner. The gas double-wall pipe drainage system can solve the technical problems that condensed water is directly discharged to an engine room in the prior art, and when the inner pipe and the outer pipe of the double-wall pipe are damaged, gas can be possibly discharged to the engine room, so that fire hazards are caused.
Description
Technical Field
The invention relates to the technical field of drainage systems, in particular to a gas double-wall pipe drainage system.
Background
The dual-fuel container ship usually selects fuel oil and fuel gas as fuel of a host machine, a main generator set and a boiler. International regulations on the construction and equipment of bulk transport liquefied gas vessels (IGC CODE) stipulate that when gas is used as fuel, the area inside the cabin requires the use of double-walled pipes as transfer lines, otherwise the cabin is defined as a hazardous area.
The double-wall pipe is provided with an inner pipe layer and an outer pipe layer, the medium of the inner pipe is fuel gas, and the temperature of the fuel gas entering the engine room is about 0 ℃. The outer tube medium is for coming from the outside air of boats and ships, and the outer union coupling air exhauster is in order to continuously take away the air of outer tube through the air exhauster to make double-walled pipe outer tube have certain negative pressure, fresh air is constantly inhaled from the outside, thereby drives outer tube air and continuously circulates. When gas leaks from the inner pipe to the outer pipe, it is carried out of the cabin by the continuously circulating air.
Because the air on the sea contains a large amount of water vapor, after the air enters the outer pipe of the double-wall pipe, the air is cooled by the low-temperature fuel gas in the inner pipe, and most of the water vapor is cooled into condensed water. If the condensed water is not discharged in time, the condensed water can be blocked in the pipeline, so that fresh air can not enter the double-wall pipe; however, if this condensate is discharged directly into the nacelle, there is a risk that, if there is a break between the inner and outer tubes of the double-walled tube, gas will be discharged into the nacelle, thereby causing a fire.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a gas double-walled pipe drainage system, which can solve the technical problems in the prior art that condensed water is directly discharged to a cabin, and when there is a damage between an inner pipe and an outer pipe of a double-walled pipe, gas may be discharged to the cabin, thereby causing a fire hazard.
In order to achieve the above object, the present invention provides a gas double-walled pipe drainage system, comprising:
the gas double-wall pipe comprises an outer pipe and an inner pipe, and the gas inlet of the inner pipe is connected with a gas inlet; a discharge pipe is connected to the lowest point of each bent pipe body of the outer pipe; and the connecting pipe sections of the outer pipe and each discharge pipe are provided with combustible gas detection devices;
the water outlet of the discharge pipe is connected with the water inlet of the discharge tank;
the water inlet of the discharge tank is provided with a first stop valve in a matching manner for controlling the opening or closing of the water inlet of the discharge tank; the bottom of the discharge tank is provided with a discharge port, and the discharge port is matched with a second stop valve used for controlling the opening or closing of the discharge port.
Further, a liquid level switch is arranged on the discharge tank, and the distance between the liquid level switch and the bottom of the discharge tank is larger than the distance between the liquid level switch and the top of the discharge tank.
Further, the ratio of the height of the liquid level switch from the bottom of the discharge tank to the height of the liquid level switch from the top of the discharge tank is 9: 1.
Further, the top of the discharge tank is provided with a vent hole, and the vent hole is provided with a third stop valve for controlling the vent hole to be opened or closed in a matched manner.
Further, the tank body of the discharge tank is made of seamless steel pipes, a flange assembly is welded at the upper end of the discharge tank, and a water inlet of the discharge tank is arranged on the flange assembly.
Further, the number of the discharge tanks is the same as that of the discharge pipes, and the water outlet of one discharge pipe is connected to the water inlet of one discharge tank.
Further, the number of the discharge tanks is one, and the water outlet of each discharge pipe is connected to the water inlet of the discharge tank.
Compared with the prior art, the gas double-wall pipe drainage system provided by the invention has the following technical effects:
the gas double-wall pipe comprises an outer pipe and an inner pipe, and a gas inlet of the inner pipe is connected with a gas inlet; a discharge pipe is connected to the lowest point of each bent pipe body of the outer pipe; the water outlet of the discharge pipe is connected with the water inlet of the discharge tank; a first stop valve for controlling the opening or closing of the water inlet of the discharge tank is arranged at the water inlet of the discharge tank in a matched manner; therefore, the first stop valve can be controlled to be kept in an open state, so that the condensed water in the outer pipe can be directly discharged into the discharge tank, and the condensed water is prevented from blocking the outer pipe.
Meanwhile, combustible gas detection devices are arranged on the connecting pipe sections of the outer pipe and the discharge pipes; a discharge port is formed in the bottom of the discharge tank, and a second stop valve used for controlling the opening or closing of the discharge port is arranged at the discharge port in a matched mode; therefore, before the second stop valve is opened to discharge the condensed water in the discharge tank to a cabin sewage well, whether the combustible gas detection device triggers an alarm reaction is firstly confirmed, if the alarm reaction occurs, the air inlet of the inner pipe is firstly closed, meanwhile, an exhaust fan connected with the outer pipe is controlled to extract the gas in the outer pipe, and then the gas double-wall pipe is detected and maintained until the combustible gas detection device does not trigger the alarm reaction any more; if the alarm reaction does not occur, the first stop valve is closed to cut off the passage between the discharge tank and the gas double-wall pipe, and then the second stop valve is opened to discharge the condensed water to a cabin sewage well; thereby at the tank sluicing in-process of releasing, can effectively avoid the gas to get into the cabin inside, the risk that greatly reduced conflagration took place.
Drawings
FIG. 1 is a schematic structural diagram of a gas double-walled pipe drainage system according to a first embodiment of the present invention;
FIG. 2 is a first schematic structural diagram of a discharge tank of the gas double-walled pipe drainage system according to the present invention;
FIG. 3 is a second structural diagram of a discharge tank of the gas double-walled pipe drainage system according to the present invention;
FIG. 4 is a third schematic structural view of a discharge tank of the gas double-walled pipe drainage system according to the present invention;
fig. 5 is a schematic structural view of a gas double-walled pipe drainage system according to a second embodiment of the present invention.
The gas-liquid separator comprises a gas double-wall pipe 1, a gas double-wall pipe 11, an outer pipe 12, an inner pipe 2, a discharge pipe 3, a discharge tank 31, a water inlet 32, a first stop valve 33, a discharge opening 34, a second stop valve 35, a liquid level switch mounting opening 36, a ventilation opening 37, a third stop valve 4, a combustible gas detection device 5, a flange assembly 6, a liquid level switch 7, a main engine gas valve group 8, a dual-fuel main engine 9 and an exhaust fan.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1 to 4, a water drainage system of a gas double-wall pipe 1 according to an embodiment of the present invention includes a gas double-wall pipe 1, a main engine gas valve bank 7 and a dual-fuel main engine 8 are sequentially disposed from an upstream to a downstream direction of the gas double-wall pipe 1, and an air outlet of the main engine gas valve bank 7 and an air outlet of the dual-fuel main engine 8 are both connected to an exhaust fan 9 through a ventilation pipe; the gas double-wall pipe 1 comprises an outer pipe 11 and an inner pipe 12, and a gas inlet of the inner pipe 12 is connected with a gas inlet; a discharge pipe 2 is connected to the lowest point of each bent pipe body of the outer pipe 11; and the connecting pipe section of the outer pipe 11 and each discharge pipe 2 is provided with a combustible gas detection device 4;
the water outlet of the discharge pipe 2 is connected with the water inlet 31 of the discharge tank 3;
the water inlet 31 of the discharge tank 3 is provided with a first stop valve 32 for controlling the opening or closing of the water inlet 31 of the discharge tank 3; a discharge port 33 is arranged at the bottom of the discharge tank 3, and a second stop valve 34 for controlling the opening or closing of the discharge port 33 is arranged at the discharge port 33 in a matching manner;
the gas double-wall pipe 1 comprises an outer pipe 11 and an inner pipe 12, and a gas inlet of the inner pipe 12 is connected with a gas inlet; a discharge pipe 2 is connected to the lowest point of each bent pipe body of the outer pipe 11; the water outlet of the discharge pipe 2 is connected with the water inlet 31 of the discharge tank 3; a first stop valve 32 for controlling the opening or closing of the water inlet 31 of the discharge tank 3 is arranged at the water inlet 31 of the discharge tank 3 in a matching manner; in this way, the first cut-off valve 32 can be controlled to be kept in an open state, so that the condensed water in the outer pipe 11 can be directly discharged into the drain tank 3, and the condensed water can be prevented from clogging the outer pipe 11.
Meanwhile, the combustible gas detection device 4 is arranged on the connecting pipe section of the outer pipe 11 and each discharge pipe 2; a discharge port 33 is arranged at the bottom of the discharge tank 3, and a second stop valve 34 for controlling the opening or closing of the discharge port 33 is arranged at the discharge port 33 in a matching manner; in this way, before the second stop valve 34 is opened to discharge the condensed water in the discharge tank 3 to the cabin sump, it is first determined whether the combustible gas detection device 4 triggers an alarm reaction, if the alarm reaction occurs, the air inlet of the inner tube 12 is closed, and meanwhile, the exhaust fan 9 connected with the outer tube 11 is controlled to extract the gas in the outer tube 11, and then the gas double-wall tube 1 is detected and maintained until the combustible gas detection device 4 does not trigger the alarm reaction any more; if no alarm reaction occurs, the first stop valve 32 is closed to cut off the passage between the discharge tank 3 and the gas double-wall pipe 1, and then the second stop valve 34 is opened to discharge the condensed water to the cabin sewage well; thereby at the 3 sluices in-process of the jar of releasing, can effectively avoid the gas to get into the cabin inside, the risk that greatly reduced conflagration took place.
In the embodiment of the present invention, the inner diameter of the discharge pipe 2 is smaller than the inner diameter of the outer pipe 11 of the gas double-walled pipe 1, so as to avoid damaging the air circulation route of the outer pipe 11 of the gas double-walled pipe 1. The combustible gas detection device 4 is used for detecting the occurrence of gas leakage of the gas double-wall pipe 1.
Further, referring to fig. 1 to 4, as a specific embodiment of the gas double-walled pipe 1 drainage system provided by the present invention, a liquid level switch mounting port 35 is disposed on a side wall of the discharge tank 3, a liquid level switch 6 is mounted on the liquid level switch mounting port 35, and a height of the liquid level switch 6 from a bottom of the discharge tank 3 is greater than a height of the liquid level switch 6 from a top of the discharge tank 3. Therefore, the amount of the condensed water in the discharge tank 3 can be monitored through the liquid level switch 6, and when the condensed water in the discharge tank 3 is accumulated to trigger the liquid level switch 6 to send a high-level alarm, the condensed water in the discharge tank 3 can be discharged to a cabin sewer well by closing the first stop valve 32 and simultaneously opening the second stop valve 34.
Further, referring to fig. 1 to 3, as an embodiment of the gas double-wall pipe 1 drainage system provided by the present invention, a ratio of a height of the liquid level switch 6 from a bottom of the drain tank 3 to a height of the liquid level switch 6 from a top of the drain tank 3 is 9: 1.
It should be noted that the setting position of the liquid level switch 6 can be adjusted according to actual use requirements, and is not specifically limited herein.
In order to facilitate the drainage of the drainage port 33 and reduce the operation time of crew, further, referring to fig. 2 to 4, as a specific embodiment of the drainage system of the gas double-walled pipe 1 provided by the present invention, a vent port 36 is disposed at the top of the drainage tank 3, and a third stop valve 37 for controlling the opening or closing of the vent port 36 is disposed at the vent port 36. The third stop valve 37 is normally closed, and only when the second stop valve 34 is open, the third stop valve 37 is simultaneously opened to assist in the drainage. After the condensed water in the drain tank 3 is drained, the second stop valve 34 and the third stop valve 37 are closed at the same time, and then the first stop valve 32 is opened, so that the newly generated condensed water of the gas double-wall pipe 1 can be continuously drained into the drain tank 3.
Further, referring to fig. 1 to 3, as a specific embodiment of the gas double-walled pipe 1 drainage system provided by the present invention, the discharge tank 3 includes a tank body made of seamless steel pipe, and the tank body can be fixed on a bulkhead or a column by using a pipe clamp, so as to save occupied space; the flange assembly 5 comprises a first flange and a blind flange, and is convenient to disassemble and inspect, the lower end of the discharge tank 3 is welded with a sealing plate, the upper end of the discharge tank is welded with a flange, the flange and the blind flange are tightly locked and sealed by bolts, and the bolts can be unscrewed when the disassembly and inspection are needed. The water inlet 31 of the discharge tank 3 is arranged on the blind flange.
Further, referring to fig. 1, as a specific embodiment of the gas double-walled pipe 1 drainage system provided by the present invention, the number of the discharge tanks 3 is the same as the number of the discharge pipes 2, and the water outlet of one discharge pipe 2 is connected to the water inlet 31 of one discharge tank 3.
Example two
As shown in fig. 5, the drainage system of the gas double-wall pipe 1 provided in the present embodiment is different from the first embodiment in that: the number of the discharge tanks 3 is one, and the water outlet of each discharge pipe 2 is connected to the water inlet 31 of the discharge tank 3.
In summary, the drainage system of the gas double-wall pipe 1 of the present invention can keep the open state by controlling the first stop valve 32, so that the condensed water in the outer pipe 11 can be directly discharged into the discharge tank 3, and the condensed water can avoid blocking the outer pipe 11; in addition, before the second stop valve 34 is opened to discharge the condensed water in the discharge tank 3 to the cabin sump well, it is firstly determined whether the combustible gas detection device 4 triggers an alarm reaction, if the alarm reaction occurs, the air inlet of the inner pipe 12 is firstly closed, meanwhile, the exhaust fan 9 connected with the outer pipe 11 is controlled to extract the gas in the outer pipe 11, and then the gas double-wall pipe 1 is detected and maintained until the combustible gas detection device 4 does not trigger the alarm reaction any more; if no alarm reaction occurs, the first stop valve 32 is closed to cut off the passage between the discharge tank 3 and the gas double-wall pipe 1, and then the second stop valve 34 is opened to discharge the condensed water to the cabin sewage well; thereby at the 3 sluices in-process of the jar of releasing, can effectively avoid the gas to get into the cabin inside, the risk that greatly reduced conflagration took place.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. A gas double-walled pipe drainage system, comprising:
the gas double-wall pipe comprises an outer pipe and an inner pipe, and the gas inlet of the inner pipe is connected with a gas inlet; a discharge pipe is connected to the lowest point of each bent pipe body of the outer pipe; and the connecting pipe sections of the outer pipe and each discharge pipe are provided with combustible gas detection devices;
the water outlet of the discharge pipe is connected with the water inlet of the discharge tank;
the water inlet of the discharge tank is provided with a first stop valve in a matching manner for controlling the opening or closing of the water inlet of the discharge tank; the bottom of the discharge tank is provided with a discharge port, and the discharge port is matched with a second stop valve used for controlling the opening or closing of the discharge port.
2. The gas fired double walled pipe drainage system of claim 1, wherein a level switch is provided on the drain tank, the level switch being at a greater height from the bottom of the drain tank than the level switch is at the top of the drain tank.
3. The gas fired double walled pipe drainage system of claim 2, wherein a ratio of a height of the liquid level switch from a bottom of the blowdown tank to a height of the liquid level switch from a top of the blowdown tank is 9: 1.
4. The gas double-wall pipe drainage system according to claim 1, wherein a vent hole is formed in the top of the discharge tank, and a third stop valve for controlling the opening or closing of the vent hole is arranged at the vent hole in a matching manner.
5. The gas double-walled pipe drainage system of claim 1, wherein the tank body of the discharge tank is made of seamless steel pipe, a flange assembly is welded at the upper end of the discharge tank, and a water inlet of the discharge tank is arranged on the flange assembly.
6. A gas-fired double walled pipe drainage system as claimed in any one of claims 1 to 5, wherein the number of said discharge tanks corresponds to the number of said discharge pipes, the water outlet of one of said discharge pipes being connected to the water inlet of one of said discharge tanks.
7. A gas-fired double walled pipe drainage system as claimed in any one of claims 1 to 5, wherein the number of the drain tanks is one, and the water outlet of each of the drain pipes is connected to the water inlet of the drain tank.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303976.1A CN111609313A (en) | 2020-04-17 | 2020-04-17 | Gas double-wall pipe drainage system |
| PCT/CN2020/140262 WO2021208504A1 (en) | 2020-04-17 | 2020-12-28 | Fuel gas double-wall pipe drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303976.1A CN111609313A (en) | 2020-04-17 | 2020-04-17 | Gas double-wall pipe drainage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111609313A true CN111609313A (en) | 2020-09-01 |
Family
ID=72199631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010303976.1A Pending CN111609313A (en) | 2020-04-17 | 2020-04-17 | Gas double-wall pipe drainage system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111609313A (en) |
| WO (1) | WO2021208504A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005548A (en) * | 2019-05-28 | 2019-07-12 | 淄柴动力有限公司 | Dual fuel engine gas rail peculiar to vessel |
| CN113357549A (en) * | 2021-06-02 | 2021-09-07 | 江南造船(集团)有限责任公司 | Method for detecting leakage of double-wall pipe in engine room |
| WO2021208504A1 (en) * | 2020-04-17 | 2021-10-21 | 中船黄埔文冲船舶有限公司 | Fuel gas double-wall pipe drainage system |
| CN114576044A (en) * | 2021-11-18 | 2022-06-03 | 上海江南长兴造船有限责任公司 | Gas supply system of dual-fuel generator and ship comprising same |
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| CN110005548A (en) * | 2019-05-28 | 2019-07-12 | 淄柴动力有限公司 | Dual fuel engine gas rail peculiar to vessel |
| CN110005548B (en) * | 2019-05-28 | 2024-07-02 | 淄柴动力有限公司 | Marine dual-fuel engine gas rail |
| WO2021208504A1 (en) * | 2020-04-17 | 2021-10-21 | 中船黄埔文冲船舶有限公司 | Fuel gas double-wall pipe drainage system |
| CN113357549A (en) * | 2021-06-02 | 2021-09-07 | 江南造船(集团)有限责任公司 | Method for detecting leakage of double-wall pipe in engine room |
| CN114576044A (en) * | 2021-11-18 | 2022-06-03 | 上海江南长兴造船有限责任公司 | Gas supply system of dual-fuel generator and ship comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021208504A1 (en) | 2021-10-21 |
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Application publication date: 20200901 |