CN215636521U - LNG filling system that no BOG discharged - Google Patents
LNG filling system that no BOG discharged Download PDFInfo
- Publication number
- CN215636521U CN215636521U CN202120574602.3U CN202120574602U CN215636521U CN 215636521 U CN215636521 U CN 215636521U CN 202120574602 U CN202120574602 U CN 202120574602U CN 215636521 U CN215636521 U CN 215636521U
- Authority
- CN
- China
- Prior art keywords
- bog
- lng
- pressure
- detection device
- pipeline
- 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
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses an LNG filling system without BOG discharge, which comprises an LNG storage tank, a BOG compressor, an LNG pump, a BOG buffer tank, a regulating valve, a mixer and an LNG liquid adding machine, wherein an upper outlet of the LNG storage tank is communicated with the BOG buffer tank through the BOG compressor through a first BOG pipeline, the BOG buffer tank is communicated with the mixer through a second BOG pipeline provided with the regulating valve, a lower outlet of the LNG storage tank is communicated with the mixer through the LNG pump through the first LNG pipeline, an outlet of the mixer is communicated with the LNG liquid adding machine through the second LNG pipeline to output LNG, pressure detection devices are arranged behind the BOG compressor and the LNG pump, and a temperature detection device is arranged at an outlet of the mixer. The utility model has simple structure and strong applicability, controls the opening of the regulating valve and the output of the mixer by using temperature and pressure, and ensures that LNG and BOG are fully subjected to heat exchange in the mixer.
Description
Technical Field
The utility model relates to the technical field of LNG (liquefied natural gas) filling systems, in particular to an LNG filling system without BOG (boil off gas) discharge.
Background
LNG is liquid natural gas formed by purifying, condensing and liquefying natural gas, is an important clean energy, is widely applied to the fields of industry, civilian use and the like in recent years, has the advantages of high combustion utilization, less emission pollution, low cost and the like compared with other fuel energy sources, and is used as a high-quality fuel.
The LNG filling station inevitably generates low-temperature gas BOG, wherein the BOG gas is flash steam generated by partial evaporation of LNG in a storage process, namely gaseous natural gas generated by gasification, is a gas with strong greenhouse effect, and if the gas is discharged into the atmosphere, the gas causes serious greenhouse effect and wastes clean energy.
The current BOG gas recovery in LNG gas station includes the following ways:
1. BOG is used as self-gas or is connected into a town gas pipe network after being heated, pressure-regulated (metered) and odorized, and the mode is not suitable for areas where pipe networks are not laid and has certain limitation.
2. BOG is heated, compressed and odorized and stored in a high-pressure gas storage bottle to serve as a CNG gas source, and the BOG is pressurized to 25MPa by the method and needs to be compressed by 2-3 levels, so that the method has high cost.
3. BOG and liquid nitrogen are subjected to heat exchange to realize reliquefaction of BOG gas, the cost of the liquid nitrogen sledge is high in the mode, and more liquid nitrogen can be consumed to cause resource waste.
4. BOG and LNG are mixed and heat exchanged to achieve reliquefaction of BOG gas, and due to the fact that BOG and LNG are mixed and output, complete liquefaction of BOG is guaranteed, multistage circulation processing is needed, the BOG reliquefaction method is complex, and LNG conveying does not have independence.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an LNG filling system without BOG discharge, which is characterized in that BOG and LNG are respectively boosted and output to a mixer through a BOG compressor and an LNG pump, heat exchange is carried out between the BOG and LNG by utilizing cold energy of the LNG, a pressure transmitter and a temperature transmitter are simultaneously arranged to obtain pressure and temperature states of the system, and the pressure of a BOG pipeline and the pressure of an LNG pipeline and the opening of a regulating valve are coordinately controlled according to the pressure and temperature values.
The utility model adopts a technical scheme that: the utility model provides a no LNG filling system that BOG discharged, the system includes LNG storage tank, BOG compressor, LNG pump, BOG buffer tank, governing valve, blender and LNG liquid feeding machine, the LNG storage tank is including establishing first export and the second export at jar body upper and lower both ends, first export is through first BOG pipeline intercommunication the BOG compressor, the second export is through first LNG pipeline intercommunication the LNG pump, the BOG compressor other end is through first BOG pipe connection the BOG buffer tank, the blender pass through second BOG pipeline and first LNG pipeline respectively with BOG buffer tank with the LNG pump is connected, still be equipped with the governing valve on the second BOG pipeline, the other end of blender passes through second LNG pipe connection LNG liquid feeding machine.
Utilize BOG compressor and LNG pump to boost the LNG and BOG in the LNG storage tank and take out, the BOG compressor lets in the BOG buffer tank with the BOG of taking out, through the operating condition of regulation and control BOG compressor, controls the pressure stability of BOG buffer tank, lets in LNG and BOG and carries out heat exchange in the blender again.
Furthermore, the system is also provided with a control cabinet which is connected with the pressure detection device, the temperature detection device, the regulating valve and the BOG compressor through lines.
The control cabinet is used for receiving the detected pressure value and temperature value in real time, controlling the opening of the regulating valve and the working state of the BOG compressor, and facilitating real-time regulation of the pressure detection device to a balance state.
Furthermore, the control cabinet comprises a main control module and a touch display screen.
Furthermore, a liquid level meter or a pressure meter is arranged on the LNG storage tank.
A liquid level meter or a pressure meter is arranged on the LNG storage tank to monitor the distribution condition of the LNG and the BOG in the LNG storage tank.
Further, pressure measurement is pressure transmitter, just pressure measurement is equipped with two and is first pressure measurement and second pressure measurement respectively, first pressure measurement establishes LNG pump output end department, second pressure measurement establishes BOG compressor output end department or on the BOG buffer tank.
Utilize pressure transmitter to change pressure signal into the signal of telecommunication to in will detecting data transmission to the switch board, first pressure detection device is arranged in detecting the pressure value that the LNG pump exported, and second pressure detection device is used for detecting the pressure of BOG compressor output or the pressure of BOG buffer tank.
Further, the temperature detection device is a temperature transmitter and is arranged at the outlet of the mixer.
Utilize temperature transmitter to change temperature signal into the signal of telecommunication to in will detecting data transmission to the switch board, be arranged in detecting the temperature value of blender output end department, adjust and control the aperture of governing valve according to temperature change, change the output of BOG.
The utility model has the beneficial effects that:
1. BOG and LNG in the LNG storage tank are mixed by the mixer, the temperature value and the pressure value monitored by the pressure detection device and the temperature detection device coordinate and control the opening of the regulating valve and the working state of the BOG compressor according to the temperature and pressure changes detected in real time, and further the flow rate of the LNG and the BOG pipeline is controlled to be balanced in pressure and the BOG, so that the BOG and the LNG in the mixer can fully exchange heat.
2. The system has the advantages of simple structure, low cost and strong applicability, the BOG compressor is connected to the upper outlet of the LNG storage tank to output the BOG, the system does not need to depend on a town gas pipe network, the BOG is reasonably recycled, the emission of the BOG is reduced, and the system is more suitable for the LNG gas station.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention.
Reference numerals: the system comprises an LNG storage tank 1, a BOG compressor 2, an LNG pump 3, a BOG buffer tank 4, a regulating valve 5, a mixer 6, an LNG liquid adding machine 7, a temperature detection device 8, a liquid level meter 9 and a pressure detection device 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.
The embodiment of the utility model provides a BOG emission-free LNG filling system, which comprises an LNG storage tank, a BOG compressor, an LNG pump, a BOG buffer tank, a regulating valve, a mixer and an LNG filling machine, wherein the LNG storage tank comprises a first outlet and a second outlet which are arranged at the upper end and the lower end of a tank body, the first outlet is communicated with the BOG compressor through a first BOG pipeline, the second outlet is communicated with the LNG pump through a first LNG pipeline, the other end of the BOG compressor is connected with the BOG buffer tank through the first BOG pipeline, the mixer is respectively connected with the BOG buffer tank and the LNG pump through a second BOG pipeline and the first LNG pipeline, the second BOG pipeline is further provided with the regulating valve, and the other end of the mixer is connected with the LNG filling machine through the second LNG pipeline.
The LNG pump boosts the LNG in the LNG storage tank and then leads the LNG to the liquid phase inlet of the mixer, the BOG compressor boosts the BOG in the LNG storage tank and outputs the BOG to the BOG buffer tank, and finally the LNG and the BOG are led to the mixer, and the LNG liquefies the BOG by utilizing the cold energy of the LNG and raises the temperature of the LNG; in this embodiment, still be equipped with the level gauge on the LNG storage tank, detect the output condition of BOG in the LNG storage tank.
In this embodiment, pressure measurement adopts pressure transmitter, and wherein pressure measurement is equipped with two and includes first pressure measurement and second pressure measurement, is pressure transmitter PT1 and PT2 respectively, and pressure transmitter PT1 sets up LNG pump output end one side for detect the pressure state of LNG pump output, pressure transmitter PT2 sets up one side of BOG compressor output for detect the pressure state after the BOG compressor output.
In this embodiment, the temperature detection device adopts a temperature transmitter, and the temperature transmitter TT1 is arranged at the mixer outlet for detecting the temperature at the mixer outlet.
The system comprises a pressure transmitter PT1, a pressure transmitter PT2 and a temperature transmitter TT1, wherein the pressure transmitter PT1, the pressure transmitter PT2 and the temperature transmitter TT1 transmit detected data to a control cabinet in real time, a touch display screen is arranged outside the control cabinet, the received data detected by the transmitters are output and displayed, the pressure states of a first BOG pipeline and a first LNG pipeline of the system and the temperature state of an output port of a mixer can be monitored in real time, a worker can set temperature parameters through the display screen, the control cabinet is connected with a regulating valve and a BOG compressor through a line, and control signals are sent to the BOG compressor and the regulating valve according to the values of the pressure transmitter PT1 and the pressure transmitter PT2 and the temperature value detected by the temperature transmitter TT1 to control the working state of the BOG and the opening degree of the regulating valve;
through the operating condition of regulation and control BOG compressor, and then the pressure of regulation and control delivery outlet, make pressure transmitter PT1 the same with pressure transmitter PT 2's pressure value, guarantee the output pressure of BOG compressor and the output pressure of LNG pump balanced mutually promptly, the output quantity of BOG in the aperture control BOG buffer tank through the control governing valve, when the temperature that temperature transmitter TT1 detected reached to predetermine the temperature parameter, BOG and LNG that let in the blender can fully carry out the heat exchange, and then the BOG of guaranteeing to input in the blender is totally liquefied.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The utility model provides a no LNG filling system that BOG discharged, its characterized in that, the system includes LNG storage tank, BOG compressor, LNG pump, BOG buffer tank, governing valve, blender and LNG liquid feeding machine, the LNG storage tank is including establishing first export and the second export at jar body upper and lower both ends, first export is through first BOG pipeline intercommunication the BOG compressor, the second export is through first LNG pipeline intercommunication the LNG pump, the BOG compressor other end is through first BOG pipe connection the BOG buffer tank, the blender pass through second BOG pipeline and first LNG pipeline respectively with BOG buffer tank with the LNG pump is connected, still be equipped with the governing valve on the second BOG pipeline, the other end of blender passes through second LNG pipe connection LNG liquid feeding machine.
2. The BOG-emission-free LNG filling system according to claim 1, wherein a control cabinet is provided and is in line connection with the pressure detection device, the temperature detection device, the regulating valve and the BOG compressor.
3. The BOG-emission-free LNG filling system according to claim 2, wherein the control cabinet comprises a main control module and a touch display screen.
4. The BOG-emission-free LNG filling system according to claim 2, wherein a liquid level gauge or a pressure gauge is provided on the LNG storage tank.
5. The BOG-emission-free LNG filling system according to claim 4, wherein the pressure detection device is a pressure transmitter, and the pressure detection device is provided with two first pressure detection devices and two second pressure detection devices, respectively, the first pressure detection device is provided at the output end of the LNG pump, and the second pressure detection device is provided at the output end of the BOG compressor or on the BOG buffer tank.
6. The BOG-emission-free LNG filling system according to claim 5, wherein the temperature detection device is a temperature transmitter disposed at the mixer outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120574602.3U CN215636521U (en) | 2021-03-22 | 2021-03-22 | LNG filling system that no BOG discharged |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120574602.3U CN215636521U (en) | 2021-03-22 | 2021-03-22 | LNG filling system that no BOG discharged |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215636521U true CN215636521U (en) | 2022-01-25 |
Family
ID=79913841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120574602.3U Active CN215636521U (en) | 2021-03-22 | 2021-03-22 | LNG filling system that no BOG discharged |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215636521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941801A (en) * | 2022-05-27 | 2022-08-26 | 国家石油天然气管网集团有限公司 | BOG (boil off gas) emptying control system of LNG (liquefied Natural gas) receiving station |
| CN115493081A (en) * | 2022-09-14 | 2022-12-20 | 重庆燃气集团股份有限公司 | Zero release BOG cyclic recycling utilizes system |
-
2021
- 2021-03-22 CN CN202120574602.3U patent/CN215636521U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941801A (en) * | 2022-05-27 | 2022-08-26 | 国家石油天然气管网集团有限公司 | BOG (boil off gas) emptying control system of LNG (liquefied Natural gas) receiving station |
| CN114941801B (en) * | 2022-05-27 | 2024-05-14 | 国家石油天然气管网集团有限公司 | BOG emptying control system of LNG receiving station |
| CN115493081A (en) * | 2022-09-14 | 2022-12-20 | 重庆燃气集团股份有限公司 | Zero release BOG cyclic recycling utilizes system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN215636521U (en) | LNG filling system that no BOG discharged | |
| CN202082623U (en) | Aftercondenser control system | |
| CN103225740B (en) | A kind of LNG receiving station utilizes the BOG processing system of pressure energy | |
| CN104006289A (en) | Skid-mounting full integration LNG and LCNG remote monitor unattended filling station | |
| CN103225739B (en) | A kind of LNG receiving station boil-off gas energy-efficient treatment system | |
| CN206247018U (en) | LNG gasification air supply system | |
| CN207005713U (en) | Nitrogen feed system | |
| CN108953988A (en) | A kind of vaporization of liquid hydrogen and self-supercharging device | |
| CN2844641Y (en) | Bottle prized LNG gas-supply terminal | |
| CN210601032U (en) | Novel liquefied natural gas unloading system capable of being started quickly | |
| CN203598781U (en) | Centralized preparation and supply system for mixed gas | |
| CN206310233U (en) | Liquefied natural gas storage tank BOG gas cold energy recycle systems | |
| CN204201469U (en) | A kind of poisonous and harmful cryogenic liquide tapping equipment | |
| CN208457567U (en) | The LNG refueling system of low energy consumption with BOG recycling function | |
| CN208901089U (en) | A kind of natural gas pressure regulating metering device | |
| CN210266717U (en) | BOG power generation system of LNG receiving station | |
| CN210511034U (en) | CNG gas storage well CNG recovery system | |
| CN104075107B (en) | A kind of technological process of LNG gasification | |
| CN202419134U (en) | Liquefied natural gas supplying system | |
| CN206449402U (en) | LNG gas stations storage tank voltage-stabilizing system | |
| CN112303496A (en) | Industrial gas safety intelligent gas supply device with filling and metering functions | |
| CN207865023U (en) | A kind of small evaporator station | |
| CN203488983U (en) | System is seen off to internal compression flow oxygenerator pipe network | |
| CN107327357B (en) | Natural gas power ship fuel monitoring system, fuel monitoring control method and device | |
| CN111963738A (en) | Remote pressure monitoring device |
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: No.3, 11th floor, building 6, no.599, shijicheng South Road, Chengdu hi tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 610041 Patentee after: Houpu clean energy (Group) Co.,Ltd. Address before: No.3, 11th floor, building 6, no.599, shijicheng South Road, Chengdu hi tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 610041 Patentee before: Houpu clean energy Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230731 Address after: No. 309, Commercial Building 2, Phase I, Western Agricultural Machinery Exhibition and Sales Center, No. 198, Shimu Road, Shibantan Street, Xindu District, Chengdu, Sichuan 610047 Patentee after: Houpu Clean Energy Group Energy Equipment Co.,Ltd. Address before: No.3, 11th floor, building 6, no.599, shijicheng South Road, Chengdu hi tech Zone, China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 610041 Patentee before: Houpu clean energy (Group) Co.,Ltd. |