CN216113361U - Self-pressurization gas supply system for ship - Google Patents
Self-pressurization gas supply system for ship Download PDFInfo
- Publication number
- CN216113361U CN216113361U CN202122512131.6U CN202122512131U CN216113361U CN 216113361 U CN216113361 U CN 216113361U CN 202122512131 U CN202122512131 U CN 202122512131U CN 216113361 U CN216113361 U CN 216113361U
- Authority
- CN
- China
- Prior art keywords
- natural gas
- tank
- gas
- self
- gas fuel
- 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.)
- Active
Links
Images
Abstract
The application provides a boats and ships are with self-pressurization gas supply system includes: a gas tank that receives a supply of natural gas fuel from the outside; a heat exchanger for heating the liquefied natural gas fuel drawn out from the gas tank and selectively returning the heated and vaporized natural gas fuel to the gas tank; a buffer tank selectively receiving vaporized natural gas fuel exiting the heat exchanger; a flash vapor supply pipe for selectively leading the flash vapor in the gas storage tank to the heat exchanger, wherein the heat exchanger leads the heated flash vapor to the buffer tank; wherein the buffer tank guides the vaporized natural gas fuel and/or flash steam in the buffer tank to the power generation unit.
Description
Technical Field
The application relates to the technical field of ships, in particular to a self-pressurization gas supply system for ships.
Background
In order to reduce the pollution of ship exhaust gas to the environment and atmosphere, different ship exhaust regulations are successively set by international organization and countries all over the world, and in the face of increasingly severe environmental requirements, the use of novel fuels represented by Liquid Natural Gas (LNG) is an important trend of ship power development in recent years, and as a key system necessary for an LNG power ship, continuous optimization of a natural gas supply system also draws more and more attention.
The existing low-pressure self-pressurization gas supply system for the ship generally has the following problems:
how to reasonably utilize flash vapor (BOG): in order to achieve the gas supply pressure of the host, the pressure set value in the LNG storage tank is high, which leads to the fact that the volatilization amount of BOG in the storage tank is large, at present, the BOG is processed mainly by adopting a mode of exhausting atmosphere or increasing BOG heater and then consuming by an engine, which leads to energy waste or increases BOG processing cost, and how to reasonably utilize the BOG to lead the LNG gas supply system to stably operate is of great importance under the condition of not increasing cost.
SUMMERY OF THE UTILITY MODEL
The application provides a self-pressurization gas supply system for ships to solve the technical problem that the ship gas supply system in the prior art cannot reasonably utilize flash steam.
The application provides a boats and ships are with self-pressurization gas supply system, it includes: a gas tank that receives a supply of natural gas fuel from the outside; a heat exchanger for heating the liquefied natural gas fuel drawn out from the gas tank and selectively returning the heated and vaporized natural gas fuel to the gas tank; a buffer tank selectively receiving vaporized natural gas fuel exiting the heat exchanger; a flash vapor supply pipe for selectively leading the flash vapor in the gas storage tank to the heat exchanger, wherein the heat exchanger leads the heated flash vapor to the buffer tank; wherein the buffer tank guides the vaporized natural gas fuel and/or flash steam in the buffer tank to the power generation unit.
Optionally, in some embodiments of the present application, a first heat exchange assembly and a second heat exchange assembly are disposed inside the heat exchanger, the first heat exchange assembly is configured to selectively introduce the natural gas fuel back to the gas storage tank, and the second heat exchange assembly is configured to selectively introduce the natural gas fuel to the buffer tank.
Optionally, in some embodiments of the present application, the self-pressurization gas supply system for a ship further includes a filling station, which supplies natural gas fuel to the gas storage tank, and selectively diverts the natural gas fuel to the heat exchanger, and the heat exchanger diverts the heated natural gas fuel to the buffer tank.
Optionally, in some embodiments of the present application, the self-pressurizing gas supply system for a ship further includes a first natural gas transportation pipe, which selectively diverts natural gas fuel from a filling station to the second heat exchange assembly; a second natural gas transport pipe that selectively diverts natural gas fuel at a bottom of a gas storage tank to the first heat exchange assembly; a third natural gas transportation pipeline that selectively diverts natural gas fuel at a bottom of the gas storage tank to the second heat exchange assembly.
Optionally, in some embodiments of the present application, the self-pressurization gas supply system for a ship further includes a control system, and the flash gas supply pipe, the filling station, the first natural gas transportation pipe, the second natural gas transportation pipe, and the third natural gas transportation pipe are controlled to be opened and closed by the control valve.
Optionally, in some embodiments of the present application, the control valve is divided into an on-off valve and an adjustable valve, the on-off valve is disposed in the filling station, and the adjustable valve is disposed in the flash gas supply pipe, the first natural gas delivery pipe, the second natural gas delivery pipe, and the third natural gas delivery pipe.
Optionally, in some embodiments of the present application, the control system monitors and records a pressure value of the inner cavity of the air storage tank.
Optionally, in some embodiments of the present application, the heat exchanger is heated by a water glycol system that utilizes a water glycol mixture as a heating medium.
Optionally, in some embodiments of the present application, the gas tank is a double-layer vacuum gas tank.
The self-pressurization gas supply system for the ship has the advantages that the central heat exchanger is adopted, the pressurization of the gas storage tank, the gas supply of the power source and the recycling treatment of flash evaporation gas can be met, the number of the heat exchangers is reduced, the occupied space of equipment is reduced, the system is simplified, and the equipment cost is reduced. The flash steam in the gas storage tank is guided to the heat exchanger through the flash steam supply pipe, so that the flash steam can be effectively utilized as energy, the resource waste is avoided, and the energy conversion rate is also improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a self-pressurizing air supply system for a marine vessel provided herein;
the numbers in the figures are as follows:
a gas storage tank 1; a heat exchanger 2;
a filling station 3; a control system 4;
a heating system 5; a buffer tank 6;
a power generation unit 7; a first natural gas delivery pipe 31;
a flash gas supply pipe 11; a second natural gas delivery pipe 12.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the utility model, are given by way of illustration and explanation only, and are not intended to limit the scope of the utility model. In the present application, unless otherwise specified, the use of directional terms such as "upper", "lower", "left" and "right" generally refer to upper, lower, left and right in the actual use or operation of the device, and specifically to the orientation of the drawing figures.
The present application provides a self-supercharging air supply system for a ship, which will be described in detail below.
Referring to fig. 1, fig. 1 is a schematic view of a self-pressurization air supply system for a ship according to the present application. In this application, the marine self-pressurization gas supply system of this application includes gas holder 1, heat exchanger 2, filling station 3, control system 4, heating system 5, buffer tank 6 and power generation unit 7.
Gas holder 1 is the double-deck vacuum gas holder of C type, and gas holder 1 includes inner tank and outer jar, the inner tank is used for receiving and stores microthermal liquefied natural gas, outer jar is used for isolated heat, the inner tank with evacuation and packing heat-insulating material between the outer jar to avoid external heat transfer to the inner tank in, guarantee the low temperature storage performance of inner tank.
The gas storage tank 1 in the present application is selectively communicated with the heat exchanger 2 and the filling station 3 through various pipes, thereby forming a filling passage, a pressurizing passage, a gas supply passage and a flash vapor (BOG) processing passage.
Specifically, in this embodiment, the filling station 3 includes two filling ports, each of which has a valve V1 and a valve V2, and the filling ports are communicated with the inside of the gas storage tank 1, wherein the filling port at which the valve V1 is located is inserted into the upper space and the lower space of the gas storage tank 1 through an upper filling pipe and a lower filling pipe, and the upper filling pipe and the lower filling pipe are respectively provided with the valves V3 and V4 for controlling the communication and the blocking of the upper filling pipe and the lower filling pipe. The filling port where the valve V2 is located is connected with the top of the gas storage tank 1 through a gas return pipeline, a valve V5 is arranged in the gas return pipeline, and the gas return pipeline is used for ensuring that the internal pressure and the external pressure of the gas storage tank 1 are kept consistent in the filling process so as to facilitate the filling of natural gas fuel.
Particularly, the filling port where the valve V1 is located is also communicated with the heat exchanger 2 through the first natural gas conveying pipe 31, so that the natural gas fuel of the filling station 3 can be directly conveyed into the heat exchanger 2, the adjustable valve V6 is arranged in the first natural gas conveying pipe 31, the adjustable valve V6 can adjust the capacity of the natural gas fuel passing through the inside of the first natural gas conveying pipe 31, the natural gas fuel is directly supplied to the power generation unit 7 after being heated and vaporized through the heat exchanger 2, an external power supply system is not required to be called, the filling process is simplified, and the operation cost is reduced.
The bottom of the gas storage tank 1 is provided with a second natural gas conveying pipe 12, the second natural gas conveying pipe 12 is communicated into the heat exchanger 2 through two independent pipelines, the heat exchanger 2 is internally provided with a first heat exchange assembly 21 and a second heat exchange assembly 22 which are independent of each other, a valve V8 is arranged in the second natural gas conveying pipe 12 and used for controlling the opening and closing of the second natural gas conveying pipe 12, the pipeline of the second natural gas conveying pipe 12 communicated with the first heat exchange assembly 21 is provided with an adjustable valve V9 used for adjusting the capacity of natural gas fuel entering the first heat exchange assembly 21, the top of the first heat exchange assembly 21 and the top of the gas storage tank 1 are communicated through a pipeline, a valve V10 is arranged in the pipeline and used for communicating or cutting off the first heat exchange assembly 21 and the gas storage tank 1, after the valve V10 is opened, the first heat exchange assembly 21 heats the natural gas fuel pumped out from the gas storage tank 1 and then leads back to the gas storage tank 1 through the pipeline, to increase the internal pressurization of the gas storage tank 1 so that the natural gas fuel inside is maintained in a saturated liquid state. An adjustable valve V11 is arranged on a pipeline of the second natural gas conveying pipe 12 communicated with the second heat exchange assembly 22 and used for adjusting the capacity of natural gas fuel entering the second heat exchange assembly 22, after the adjustable valve V11 is opened, the second heat exchange assembly 22 heats and vaporizes the natural gas fuel pumped out from the gas storage tank 1, the heated vaporized natural gas is guided to the buffer tank 6, and then the vaporized natural gas fuel in the buffer tank 6 is guided to the power generation unit 7 to be driven by the power generation unit 7.
In this embodiment, the heat exchanger 2 is heated by an external heating system 5, specifically, the heating system 5 uses a water-ethylene glycol mixture as a heating medium to heat the natural gas fuel or the flash steam passing through the heat exchanger 2, and in other preferred embodiments of the present application, other substances may also be used as the heating medium.
In order to systematically detect the air pressure value in the air storage tank 1 and control the opening and closing of each valve, in the embodiment, the centralized control system 4 is adopted for controlling, the control system 4 monitors the operation process of the whole system, and the actuators such as a control valve, a cut-off valve and the like are used for regulating and controlling the parameters such as the temperature, the pressure and the like of natural gas and cutting off the natural gas in an emergency manner, so that the normal work of the self-pressurization air supply system for the ship is ensured. In this embodiment, a first air pressure threshold value and a second air pressure threshold value are input in advance in a program of the control system 4, wherein the first air pressure threshold value is 6-8 bar, which is a pressure value required by the power generation unit 7, and the second air pressure threshold value is 9-9.5 bar, when the control system 4 monitors that the air pressure in the air storage tank 1 is lower than the first air pressure threshold value, the heat exchanger 2 heats the liquid natural gas fuel pumped from the air storage tank 1 and introduces the heated and vaporized natural gas fuel back to the air storage tank 1, and the natural gas fuel in the air storage tank 1 is kept in a saturated liquid state by continuously increasing the air pressure value in the air storage tank 1.
When the air pressure in the air storage tank 1 is between the first air pressure threshold value and the second air pressure threshold value, the heat exchanger 2 heats the liquefied natural gas fuel pumped from the air storage tank 1 and guides the heated and vaporized natural gas fuel to the buffer tank 6 for the power generation unit 7 to use.
When the air pressure in the air storage tank 1 is higher than the second air pressure threshold value, the flash evaporation gas supply pipe 11 guides the flash evaporation gas in the air storage tank 1 to the heat exchanger 2, and the heat exchanger 2 guides the heated flash evaporation gas to the buffer tank 6 for the power generation unit 7 to use.
In order to better illustrate the present invention, this embodiment further provides a working method of the self-pressurization air supply system for a ship, including the following steps:
pre-gas supply step: and closing the valve V8 of the second natural gas conveying pipe, and closing the valves V9 and V10. Opening a valve V1 at a filling port of a filling station 3, opening a valve V6 of a first natural gas conveying pipe 31, guiding natural gas fuel conveyed by the filling station 3 to a second heat exchange part 21 of a heat exchanger 2 through the first natural gas conveying pipe 31, heating the natural gas fuel by the heat exchanger 1, then vaporizing the natural gas fuel, and then introducing the vaporized natural gas fuel into a buffer tank 6, wherein the buffer tank 6 guides the vaporized natural gas fuel in the buffer tank to a power generation unit 7, so that the normal operation of the ship is ensured, extra shore power connection is not needed, and the operation cost of the ship is reduced.
Filling: continuing to open the valve V2, the valve V3, the valve V4 and the valve V5 at the filling port of the filling station 3, so that natural gas fuel is supplied to the gas storage tank 1 through the filling station 3, closing the valve V3, the valve V4 and the valve V5 after filling is completed, closing the valves V1 and V2 at the filling port of the filling station 3 and closing the valve V6 of the first natural gas delivery pipe 31 when the system to be controlled monitors that the gas pressure value in the gas storage tank is greater than the gas pressure value required by the power generation unit 7, namely greater than a first gas pressure threshold value, and performing a gas supply step.
And a gas supply step, namely opening a valve V8 of a second natural gas conveying pipe 12 at the bottom of the gas storage tank 1, and opening and adjusting a valve V9 and a valve V10 when the pressure value of an inner cavity of the gas storage tank is lower than a first air pressure threshold value, so that the natural gas fuel pumped out from the bottom of the gas storage tank 1 is heated and vaporized through a first heat exchange part 21 and then is guided back to the gas storage tank 1, thereby continuously increasing the air pressure value in the gas storage tank 1 and keeping the natural gas fuel in the gas storage tank 1 in a saturated liquid state. When the control system 4 monitors that the pressure value of the inner cavity of the gas storage tank 1 is between the first gas pressure threshold value and the second gas pressure threshold value, the valve V11 is opened and the opening degree is adjusted, so that part of the natural gas fuel pumped out of the gas storage tank 1 is guided back to the gas storage tank 1 after being heated and vaporized through the first heat exchange component 21, the other part of the natural gas fuel is guided to the buffer tank 6 after being heated and vaporized, at the moment, the ship normally works, and when the pressure value of the inner cavity of the gas storage tank 1 is higher than the second gas pressure threshold value, the flash evaporation gas treatment step is carried out.
Flash steam treatment: closing the valve V9 and the valve V10 to stop introducing the natural gas fuel back to the gas storage tank 1, opening the valve V7 of the flash gas supply pipe 11, introducing the flash gas in the gas storage tank into the second heat exchange part 21 through the flash gas supply pipe 11, heating the flash gas by the second heat exchange part 21, introducing the heated and vaporized flash gas into the buffer tank 1, and closing the flash gas supply pipe and repeating the gas supply step when the pressure value of the inner cavity of the gas storage tank is lower than the second air pressure threshold value. In this embodiment, the flash steam gas supply pipe 11 is adopted to convey the flash steam gas to the second heat exchange part 21, so that the direct emission of the flash steam gas to the atmosphere is avoided to cause environmental pollution, and meanwhile, a flash steam gas heater is not required to be additionally arranged, so that the energy is saved, and the flash steam gas treatment cost is also reduced.
The self-pressurization gas supply system for the ship has the advantages that the central heat exchanger is adopted, the pressurization of the gas storage tank, the gas supply of the power source and the recycling treatment of flash evaporation gas can be met, the number of the heat exchangers is reduced, the occupied space of equipment is reduced, the system is simplified, the equipment cost is reduced, and meanwhile, the energy conversion rate is improved. The working method of the self-pressurization gas supply system for the ship monitors the internal air pressure value of the gas storage tank through the control system, and controls the opening and closing of the pipeline valves according to the difference of the internal air pressure value, so that the self-pressurization gas supply system for the ship is switched among a pre-gas supply mode, a filling mode, a gas supply mode and a flash evaporation gas treatment mode, wherein a power source is directly supplied with gas through a filling station in the pre-gas supply mode and the filling mode, an external power supply is not needed in the filling mode process, and the running cost of the ship is reduced.
The self-pressurization gas supply system for the ship provided by the application is described in detail above, and the principle and the implementation mode of the application are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A self-pressurizing air supply system for a marine vessel, comprising:
a gas tank that receives a supply of natural gas fuel from the outside;
a heat exchanger for heating the liquefied natural gas fuel drawn out from the gas tank and selectively returning the heated and vaporized natural gas fuel to the gas tank;
a buffer tank selectively receiving vaporized natural gas fuel exiting the heat exchanger;
a flash vapor supply pipe for selectively leading the flash vapor in the gas storage tank to the heat exchanger, wherein the heat exchanger leads the heated flash vapor to the buffer tank;
wherein the buffer tank guides the vaporized natural gas fuel and/or flash steam in the buffer tank to the power generation unit.
2. The self-pressurization air supply system for a ship according to claim 1,
the heat exchanger is internally provided with a first heat exchange assembly and a second heat exchange assembly, the first heat exchange assembly is used for selectively guiding the natural gas fuel back to the gas storage tank, and the second heat exchange assembly is used for selectively guiding the natural gas fuel to the buffer tank.
3. The self-pressurizing air supply system for a marine vessel according to claim 1, further comprising a filling station that supplies natural gas fuel to the storage tank, that selectively diverts natural gas fuel to the heat exchanger, and that diverts heated natural gas fuel to the buffer tank.
4. The self-pressurizing gas supply system for a marine vessel according to claim 2, further comprising a first natural gas transportation pipe that selectively diverts natural gas fuel from a filling station to the second heat exchange assembly.
5. The self-pressurizing air supply system for a marine vessel according to claim 2, further comprising
A second natural gas transport pipe that selectively diverts natural gas fuel at a bottom of a gas storage tank to the first heat exchange assembly;
a third natural gas transportation pipeline that selectively diverts natural gas fuel at a bottom of the gas storage tank to the second heat exchange assembly.
6. The self-pressurization gas supply system for the ship according to claim 1, further comprising a control system for controlling the opening and closing of the flash gas supply pipe, the filling station, the first natural gas delivery pipe, the second natural gas delivery pipe and the third natural gas delivery pipe through control valves.
7. The self-pressurization air supply system for a ship according to claim 6,
the control valve is divided into a switching valve and an adjustable valve, the switching valve is arranged in the filling station, and the adjustable valve is arranged in the flash gas supply pipe, the first natural gas conveying pipe, the second natural gas conveying pipe and the third natural gas conveying pipe.
8. The self-pressurizing air supply system for a marine vessel according to claim 6, wherein the control system monitors and records a pressure value of an inner cavity of the air storage tank.
9. The self-pressurizing air supply system for a marine vessel according to claim 1, wherein the heat exchanger is heated by a water glycol system that utilizes a water glycol mixture as a heating medium.
10. The self-pressurizing air supply system for a marine vessel according to claim 1, wherein the air tank is a double-deck vacuum air tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122512131.6U CN216113361U (en) | 2021-10-19 | 2021-10-19 | Self-pressurization gas supply system for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122512131.6U CN216113361U (en) | 2021-10-19 | 2021-10-19 | Self-pressurization gas supply system for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216113361U true CN216113361U (en) | 2022-03-22 |
Family
ID=80694088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122512131.6U Active CN216113361U (en) | 2021-10-19 | 2021-10-19 | Self-pressurization gas supply system for ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216113361U (en) |
-
2021
- 2021-10-19 CN CN202122512131.6U patent/CN216113361U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102438790B1 (en) | Bunkering vessel | |
| CN108386716A (en) | A kind of the hydrogen evaporation gas recycling system and technique of liquid hydrogen hydrogenation stations | |
| CN104791602B (en) | The LNG gaseous fuels air supply method and device that BOG is preferentially utilized | |
| CN107524911B (en) | The liquid oxygen of underwater operation platform fills and recovery system | |
| CN212456267U (en) | LNG filling online saturation adjusting mechanism | |
| CN204060975U (en) | A kind of high voltage/low voltage fuel gas supply system of Ship Power Equipment | |
| CN110748439B (en) | Low-pressure gas supply system capable of efficiently utilizing cold energy of LNG (liquefied natural gas) fuel | |
| KR101149507B1 (en) | Apparatus for treating boil-off gas | |
| CN216113361U (en) | Self-pressurization gas supply system for ship | |
| CN104165266B (en) | A kind of pressure reduction formula liquefied natural gas filling station adds injection system and method thereof | |
| CN110159920A (en) | LNG air supply system peculiar to vessel | |
| CN113983354A (en) | Self-pressurization gas supply system for ship and working method thereof | |
| CN112594545A (en) | LNG fuel gas supply system for container ship | |
| CN208846079U (en) | A kind of hydrogen evaporation steam reclamation system of liquid hydrogen hydrogenation stations | |
| CN217382515U (en) | Liquid hydrogen ship hydrogen supply system with vapor recovery function | |
| CN103382930B (en) | System utilizing normal temperature compressor to process low temperature gas | |
| CN215929209U (en) | Saving type liquid nitrogen storage tank | |
| CN212298527U (en) | Boil-off gas recovery system of hydrogenation station | |
| CN210179314U (en) | Marine LNG gas supply system | |
| CN210128240U (en) | LNG filling online saturation adjusting device | |
| CN115126627B (en) | Marine liquid ammonia fuel storage and supply system and application method | |
| KR102521169B1 (en) | Offshore HVAC Refrigerant Circulation System using Regas Energy of Liquefied Gas From FSPP | |
| CN113639192B (en) | System for realizing LNG (liquefied Natural gas) online saturation adjustment by using BOG (boil off gas) and control method | |
| CN207471116U (en) | A kind of differential LNG filling stations loading system | |
| CN217273516U (en) | Full-automatic hydrogen replacement device of generating set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: The 711 Research Institute of China Shipbuilding Corp. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: Shanghai Marine Diesel Engine Research Institute |