CN220540876U - Multifunctional LNG storage and distribution station system - Google Patents

Abstract

The utility model provides a multi-functional LNG stores up proportioning station system, includes LNG tank wagon (1), LNG storage tank (2), NG empty temperature formula gasifier group (5), water bath formula reheat ware (7), NG filter pressure regulating device (9), metering device (10), buffer tank (11), CNG compressor (12), control panel (13), CNG tank group (14), CNG air entrainment machine (15) and pipe network access mouth (18), be equipped with inlet (21), first liquid outlet (22), second liquid outlet (23) and BOG import and export (24) on LNG storage tank (2), LNG tank wagon (1) through the pipeline with inlet (21) intercommunication. The utility model integrates LNG storage, LNG filling and outward transportation, pressurized gasification and outward transportation, CNG automobile gas filling and CNG gas cylinder automobile filling, has multiple functions, can be switched and applied according to actual conditions, and improves the turnover utilization rate of LNG.

Description

Multifunctional LNG storage and distribution station system

Technical Field

The utility model relates to the technical field of fuel gas storage and distribution, in particular to a multifunctional LNG storage and distribution station system.

Background

LNG (Liquefied Natural Gas ), whose main component is methane, is recognized as the cleanest fossil energy source on earth. Colorless, odorless, nontoxic and noncorrosive, and has a volume of about 1/625 of the volume of the same amount of gaseous natural gas, and the mass of liquefied natural gas is only about 45% of the same volume of water. The LNG storage and distribution station is a natural gas station which takes LNG as a gas source and has the functions of storage and transportation and distribution. The existing LNG storage and distribution station functional positioning is usually used for regional safety emergency storage air sources, and can be used for providing seasonal peak shaving gap air sources and regional main pipeline accident supplementing air sources for air supply units and providing emergency supplementing air sources for downstream important users. However, the existing LNG storage and distribution station has too low turnover utilization rate, especially when the seasonal gas consumption is low, the LNG stored in the storage and distribution station is too wasted, when the LNG storage and distribution station is not used for a long time, a large amount of BOG gas is generated in the LNG storage tank, and in order to prevent accidents caused by too high pressure in the LNG storage tank, the generated BOG gas is required to be discharged, so that the gas is wasted.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a multifunctional LNG storage and distribution station system which integrates LNG storage, LNG filling and outward transportation, pressurized gasification outward transportation, CNG automobile gas filling and CNG gas cylinder automobile filling, has multiple functions, can be switched and applied according to actual conditions, and improves the turnover utilization rate of LNG.

The utility model adopts the following technical scheme:

the multifunctional LNG storage and distribution station system comprises an LNG tank car (1) and an LNG storage tank (2), and is characterized by further comprising an NG air temperature type gasifier group (5), a water bath type reheating device (7), an NG filtering pressure regulating device (9), a metering device (10), a buffer tank (11), a CNG compressor (12), a control panel (13), the CNG tank group (14), a CNG air entrainer (15) and a pipe network access port (18), wherein a liquid inlet (21), a first liquid outlet (22), a second liquid outlet (23) and a BOG inlet (24) are formed in the LNG storage tank (2), the LNG tank car (1) is communicated with the liquid inlet (21) through a pipeline, the NG air temperature type gasifier group (5), the water bath type reheating device (7), the NG filtering pressure regulating device (9), the metering device (10) and the pipe network access port (18) are arranged in series, and the inlet of the NG air temperature type gasifier group (5) is connected with the first liquid outlet (22) through a pipeline; the gas outlet of the NG filtering pressure regulating device (9) is divided into two paths, one path is communicated with the metering device (10), and the other path is connected with the buffer tank (11), the CNG compressor (12), the control panel (13), the CNG tank group (14) and the CNG dispenser (15) in series sequentially through pipelines.

Preferably, the outlet of the control panel (13) is communicated with a CNG filling port (16).

Preferably, the system further comprises a pressurizing gasifier (3), wherein the inlet of the pressurizing gasifier is communicated with a second liquid outlet (23) on the LNG storage tank (2), the outlet of the pressurizing gasifier is divided into two paths, one path of pressurizing gasifier is communicated with the LNG tank wagon (1), and the other path of pressurizing gasifier is communicated with the BOG inlet and outlet (24) on the LNG storage tank (2).

Preferably, a BOG inlet and outlet (24) on the LNG storage tank (2) is communicated with an inlet of the BOG air temperature type heater (6), an outlet of the BOG air temperature type heater (6) is divided into two paths, one path is communicated with the BOG filtering pressure regulating device (8), the other path is communicated with the water bath type reheater (7), and an outlet of the BOG filtering pressure regulating device (8) is communicated with the metering device (10).

Preferably, the water bath type reheater (7) is a NG+BOG water bath type heater, and is provided with a NG heating inlet (701), a NG heating outlet (702), a BOG heating inlet (703) and a BOG heating outlet (704), wherein the NG heating inlet (701) is used as a pair of communicating heating NG outlets (702), the BOG heating inlet (703) is used as a pair of communicating heating outlets (704), the NG heating inlet (701) is communicated with the outlet of the NG air temperature type gasifier group (5), the NG heating outlet (702) is communicated with the inlet of the NG filtering pressure regulating device (9), the BOG heating inlet (703) is communicated with the air outlet end of the BOG air temperature type heater (6), and the BOG heating outlet (704) is communicated with the air inlet end of the BOG filtering pressure regulating device (8).

Preferably, a variable-frequency low-temperature pump (4) is arranged on a liquid outlet pipeline of the first liquid outlet (22) on the LNG storage tank (2), a liquid outlet end of the variable-frequency low-temperature pump (4) is divided into two paths, one path is communicated with an inlet of the NG air-temperature gasifier group (5) and used for conveying LNG in the LNG storage tank (2) to the NG air-temperature gasifier group (5) for gasification, and the other path is communicated with the LNG tank wagon (1) and used for filling LNG liquid in the LNG storage tank (2) into the LNG tank wagon (1).

Preferably, the NG air temperature gasifier group (5) comprises a first NG air temperature gasifier (501) and a second NG air temperature gasifier (502) arranged in parallel.

Preferably, the LNG storage tank (2) is one of a primary-secondary tank or a vacuum powder tank.

Preferably, a first self-operated regulating valve (301) is arranged on an outlet pipeline of the supercharged gasifier (3).

Preferably, a second self-operated pressure regulating valve (601) is arranged on an inlet pipeline of the BOG air-temperature type heater (6).

Preferably, the CNG tank group (14) comprises a high-pressure CNG gas tank (1401) and a medium-pressure CNG gas tank

(1402) And a low pressure CNG storage tank (1403).

Preferably, be equipped with CNG inlet port (1301), high pressure air outlet hole (1302), middling pressure venthole (1303), low pressure air outlet hole (1304), first CNG venthole (1305) and second CNG venthole (1306) on control panel (13), CNG inlet port (1301) with the export intercommunication of CNG compressor (12), high pressure air outlet hole (1302) with high pressure CNG gas holder (1401) intercommunication, middling pressure venthole (1303) with middling pressure CNG gas holder (1402) intercommunication, low pressure air outlet hole (1304) with low pressure CNG gas holder (1403) intercommunication, first CNG venthole (1305) with CNG air entrainment machine (15) intercommunication, second CNG venthole (1306) with CNG filling mouth (16) intercommunication.

Preferably, the control panel (13) is also provided with a first filling control valve (a), a second filling control valve (b) and a CNG filling control valve (c);

the first filling control valve (a) is arranged on a pipeline between the CNG inlet hole (1301) and the first CNG outlet hole (1305) and is used for controlling filling of the CNG gas cylinder vehicle; simultaneously, the first filling control valve (a) is respectively communicated with an outlet of the CNG compressor (12) and a CNG filling port (16);

the second filling control valve (b) comprises a high-pressure filling control valve (b 1), a medium-pressure filling control valve (b 2) and a low-pressure filling control valve (b 3) which are arranged in parallel, wherein the high-pressure filling control valve (b 1) is arranged on a pipeline between a CNG air inlet hole (1301) and a high-pressure air outlet hole (1302) and is used for controlling the filling of the high-pressure CNG air storage tank (1401), the medium-pressure filling control valve (b 2) is arranged on a pipeline between the CNG air inlet hole (1301) and a medium-pressure air outlet hole (1303) and is used for controlling the filling of the medium-pressure CNG air storage tank (1402), and the low-pressure filling control valve (b 3) is arranged on a pipeline between the CNG air inlet hole (1301) and the low-pressure air outlet hole (1304) and is used for controlling the filling of the low-pressure CNG air storage tank (1403); simultaneously, the second filling control valve (b) is respectively communicated with an outlet of the CNG compressor (12) and the CNG tank group (14);

the CNG gas filling control valve (c) comprises a high-pressure CNG gas filling control valve (c 1), a medium-pressure CNG gas filling control valve (c 2) and a low-pressure CNG gas filling control valve (c 3) which are arranged in parallel, the high-pressure CNG gas filling control valve (c 1) is arranged on a pipeline between a second CNG gas outlet hole (1306) and a high-pressure gas outlet hole (1302), the medium-pressure CNG gas filling control valve (c 2) is arranged on a pipeline between the second CNG gas outlet hole (1306) and a medium-pressure gas outlet hole (1303), and the low-pressure CNG gas filling control valve (c 3) is arranged on a pipeline between the second CNG gas outlet hole (1306) and the low-pressure gas outlet hole (1304); meanwhile, the CNG filling control valve (c) is respectively communicated with the air inlet end of the CNG filling machine (15) and the CNG tank group (14).

The technical scheme of the utility model has the following advantages:

A. the multifunctional LNG storage and distribution station system integrates LNG storage, LNG filling and outward transportation, pressurized gasification outward transportation, CNG automobile gas filling and CNG gas cylinder automobile filling, has multiple functions, can be switched and applied according to actual conditions, and improves the turnover utilization rate of LNG.

B. According to the scheme, the air temperature type and water bath reheating type gasification is adopted, when the ambient temperature is low in winter, the air temperature type gasifier and the water bath reheating device can be combined for use, the air temperature type gasifier is adopted for LNG gasification, and then the water bath reheating device is used for reheating low-temperature natural gas; when the temperature is higher in summer, the water bath type reheating device can be closed, the efficient air temperature type gasifier is adopted, the environmental heat is effectively utilized for heating, the production requirement can be met, the energy consumption can be reduced, the equipment cost is low, and the operation cost is low.

C. According to the utility model, the control panel is used for controlling the filling process of the CNG automobile and the CNG gas cylinder automobile, and when the CNG automobile is filled with gas, the control panel distributes the gas according to the pressure of the CNG gas dispenser and the pressure of the CNG tank group, so that the system is safer and more efficient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required for the embodiments will be briefly described, and it will be apparent that the drawings in the following description are some embodiments of the present utility model and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

fig. 2 is a schematic diagram of a connection structure between a control panel and a CNG filling port, a CNG tank group and a CNG dispenser in the utility model.

The figures are identified as follows:

1-LNG tank car; 2-LNG storage tank, 21-liquid inlet, 22-first liquid outlet, 23-second liquid outlet and 24-BOG inlet and outlet; 3-pressurizing gasifier, 301-first self-operated regulating valve; 4-a variable frequency cryogenic pump; 5-NG air temperature gasifier group, 501-first NG air temperature gasifier, 502-second NG air temperature gasifier; 6-BOG air-temperature type heater, 601-second self-operated pressure regulating valve; 7-water bath type reheater, 701-NG heating inlet, 702-NG heating outlet, 703-BOG heating inlet and 704-BOG heating outlet; 8-BOG filtering pressure regulating device; 9-NG filtering pressure regulating device; 10-a metering device; 11-a buffer tank; 12-CNG compressor; 13-a control panel, 1301-a CNG air inlet hole, 1302-a high-pressure air outlet hole, 1303-a medium-pressure air outlet hole, 1304-a low-pressure air outlet hole, 1305-a first CNG air outlet hole, 1306-a second CNG air outlet hole; 14-CNG tank group, 1401-CNG gas tank, 1402-medium-pressure CNG gas tank, 1403-low-pressure CNG gas tank; 15-CNG gas dispenser; 16-CNG filling port; 17-an odorizing device; 18-pipe network access;

a-a first filling control valve; b-a second filling control valve, b 1-a high-pressure filling control valve, b 2-a medium-pressure filling control valve, b 3-a low-pressure filling control valve; c-CNG air entrainment control valve, c 1-high pressure CNG air entrainment control valve, c 2-medium pressure CNG air entrainment control valve, c 3-low pressure CNG air entrainment control valve.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the utility model provides a multifunctional LNG storage and distribution station system, which comprises an LNG tank car 1, an LNG storage tank 2, an NG air temperature type gasifier group 5, a water bath type reheating device 7, an NG filtering pressure regulating device 9, a metering device 10, a buffer tank 11, a CNG compressor 12, a control panel 13, a CNG tank group 14, a CNG air entrainer 15 and a pipe network inlet 18, wherein the LNG storage tank 2 is provided with a liquid inlet 21, a first liquid outlet 22, a second liquid outlet 23 and a BOG inlet 24, and the LNG tank car 1 is communicated with the liquid inlet 21 through a pipeline and is used for discharging LNG in the LNG tank car 1 into the LNG storage tank 2. The first liquid outlet 22 is sequentially connected with the NG air temperature type gasifier group 5, the water bath type reheater 7, the NG filtering pressure regulating device 9, the metering device 10 and the pipe network access 18 in series, LNG liquid output by the first liquid outlet 22 in the LNG storage tank 2 is gasified and heated by the NG air temperature type gasifier group 5 and the water bath type reheater 7 to form NG gas, and then the NG gas enters the municipal gas pipe network through the pipe network access 18 after being regulated and metered by the NG filtering pressure regulating device 9 and the metering device 10 for downstream gas users. The gas outlet of the NG filtering and pressure regulating device 9 is divided into two paths, one path is communicated with the metering device 10, the other path is connected with the buffer tank 11, the CNG compressor 12, the control panel 13, the CNG tank group 14 and the CNG dispenser 15 in series sequentially through pipelines, natural gas buffered in the buffer tank 11 after pressure regulation is compressed into CNG through the CNG compressor 12, the control panel 13 controls the logic sequence of CNG dispenser according to pressure, and the CNG dispenser 15 is used for dispensing gas to CNG automobiles.

Further, the system also comprises a CNG filling port 16, wherein the CNG filling port 16 is communicated with an outlet of the control panel 13 for filling CNG gas cylinder vehicles.

Further, the system also comprises a booster gasifier 3. In the LNG vaporization supply workflow, the LNG is required to enter the air supply network after the procedures of pressurization and outflow from the LNG storage tank, vaporization, odorization, and the like. The storage parameters of the LNG storage tank are 0.2MPa and 162 ℃, so that the LNG storage tank needs to be pressurized during operation to maintain the pressure of 0.6MPa, and the output quantity of LNG is ensured; in addition, when the LNG tank car leaks, the tank car needs to be pressurized to about 0.6MPa, and LNG is fed into the LNG tank by discharging the LNG tank car under a pressure difference. All of this can be achieved by the booster gasifier 3. The second liquid outlet 23 on the LNG storage tank 2 is communicated with the inlet of the pressurizing vaporizer 3, and is used for pressurizing and vaporizing the LNG-depleted liquid output through the second liquid outlet 23 into BOG gas. The outlet of the pressurizing gasifier 3 is divided into two paths, one path is communicated with the LNG tank wagon 1, pressurizing unloading is carried out on the LNG tank wagon 1 through BOG gas, the other path is communicated with a BOG inlet and outlet 24 on the LNG storage tank 2, and LNG is conveyed outwards by returning the BOG gas to the gas phase space of the LNG storage tank 2 to raise pressure.

Further, the system further comprises a BOG air temperature type heater 6 and a BOG filtering pressure regulating device 8, wherein a BOG inlet and outlet 24 on the LNG storage tank 2 is sequentially connected with the BOG air temperature type heater 6, the BOG filtering pressure regulating device 8, the metering device 10 and the pipe network access port 18 in series, BOG gas discharged from the LNG storage tank 2 through the BOG inlet and outlet 24 is heated by the BOG air temperature type heater 6, and enters a municipal gas pipe network through the pipe network access port 18 after being subjected to pressure regulation and metering by the BOG filtering pressure regulating device 8 and the metering device 10 for downstream gas users.

The water bath type reheater 7 is a NG+BOG water bath type heater, and is provided with a NG heating inlet 701, a NG heating outlet 702, a BOG heating inlet 703 and a BOG heating outlet 704, wherein the NG heating inlet 701 and the NG heating outlet 702 are used as a pair communicated, the BOG heating inlet 703 and the BOG heating outlet 704 are used as a pair communicated, the outlet of the NG air temperature type gasifier group 5 is communicated with the NG heating inlet 701, the NG heating outlet 702 is communicated with the inlet of the NG filtering pressure regulating device 9, the air outlet end of the BOG air temperature type heater 6 is communicated with the BOG heating inlet 703, and the BOG heating outlet 704 is communicated with the air inlet end of the BOG filtering pressure regulating device 8. Since the temperature of LNG gasified by the air-temperature vaporizer is usually about 10 ℃ lower than the ambient temperature, it is necessary to heat the gas by connecting a water bath type reheater 7 downstream of the NG air-temperature vaporizer group 5 and the BOG air-temperature heater 6.

According to the scheme, the air temperature type and water bath reheating type gasification is adopted, when the ambient temperature is low in winter, LNG gasification is firstly carried out by adopting the NG air temperature type gasifier group 5 in a mode of combining the air temperature type gasifier with the water bath reheating device, and then the low-temperature natural gas is reheated by the water bath reheating device 7; when the temperature is higher in summer, the water bath type reheater 7 can be closed, the efficient NG air temperature type gasifier group 5 is only adopted, the environmental heat is effectively utilized for heating, the production requirement can be met, the energy consumption can be reduced, the equipment cost is low, and the operation cost is low. Of course, in the process flow, a bypass pipeline can be arranged between the air outlet end of the NG air temperature type gasifier group 5 and the air inlet end of the NG filtering pressure regulating device 9, when the air temperature in summer is higher, the water bath type reheater 7 is closed, and the air outlet end of the NG air temperature type gasifier group 5 is directly communicated with the NG filtering pressure regulating device 9 through the bypass pipeline.

The liquid outlet pipeline of the first liquid outlet 22 on the LNG storage tank 2 is provided with a variable-frequency cryopump 4, the liquid outlet end of the variable-frequency cryopump 4 is divided into two paths, one path is communicated with the inlet of the NG air temperature type gasifier group 5 and used for conveying LNG in the LNG storage tank 2 to the NG air temperature type gasifier group 5 for gasification, and the other path is communicated with the LNG tank wagon 1 and used for filling LNG liquid in the LNG storage tank 2 into the LNG tank wagon 1.

The continuous operation time of the air-temperature type gasifier is generally 6 to 8 hours, if the continuous operation time exceeds 8 hours, the air-outlet temperature is reduced, and the gasification efficiency is reduced when the air-temperature type gasifier is used for a long time, so that the NG air-temperature type gasifier group 5 in the utility model comprises a first NG air-temperature type gasifier 501 and a second NG air-temperature type gasifier 502 which are arranged in parallel, and the first NG air-temperature type gasifier 501 and the second NG air-temperature type gasifier 502 are used in a switching way.

The LNG storage tank 2 is one of a primary tank and a secondary tank or a vacuum powder tank, and can be provided with n parallel connection, wherein n is more than or equal to 1.

In order to ensure the stability of the pressure of the BOG output after gasification by the booster gasifier 3 and the pressure of the BOG output from the BOG inlet 24 and the BOG outlet 24 on the LNG storage tank 2, a first self-operated regulating valve 301 is arranged on the outlet pipeline of the booster gasifier 3, and a second self-operated pressure regulating valve 601 is arranged on the inlet pipeline of the BOG air temperature type heater 6, so that the BOG gas can be regulated according to the set pressure.

As shown in fig. 1, the gas outlet end pipeline of the metering device 10 is further provided with an odorizing device 7, and the odorizing device 7 can inject odor into the natural gas in the pipeline to make the natural gas have odor, so that leakage of the natural gas occurs at a terminal or in the conveying process, and the natural gas can be perceived by people at the first time.

As shown in fig. 2, the CNG tank group 14 includes a high-pressure CNG gas tank 1401, a medium-pressure CNG gas tank 1402 and a low-pressure CNG gas tank 1403, where the control panel 13 is provided with a CNG gas inlet 1301, a high-pressure gas outlet 1302, a medium-pressure gas outlet 1303, a low-pressure gas outlet 1304, a first CNG gas outlet 1305 and a second CNG gas outlet 1306, the outlet of the CNG compressor 12 is connected with the CNG gas inlet 1301, the high-pressure gas outlet 1302 is communicated with the high-pressure CNG gas tank 1401, the medium-pressure gas outlet 1303 is communicated with the medium-pressure CNG gas tank 1402, the low-pressure gas outlet 1304 is communicated with the low-pressure CNG gas tank 1403, the first CNG gas outlet 1305 is communicated with the CNG dispenser 15, and the second CNG gas outlet 1306 is communicated with the CNG filling port 16.

The control panel 13 is also provided with a first filling control valve a, a second filling control valve b and a CNG filling control valve c, and the outlet of the CNG compressor 12 is communicated with the CNG filling port 16 and the CNG tank group 14 through the first filling control valve a and the second filling control valve b respectively; the air inlet end of the CNG dispenser 15 is communicated with the CNG tank group 14 through a CNG dispensing control valve c.

Specifically, a first filling control valve a is disposed on a pipeline between the CNG inlet 1301 and the first CNG outlet 1305, for controlling filling of the CNG gas cylinder. The second filling control valve b includes a high-pressure filling control valve b1, a medium-pressure filling control valve b2 and a low-pressure filling control valve b3 which are arranged in parallel, the high-pressure filling control valve b1 is arranged on a pipeline between the CNG air inlet 1301 and the high-pressure air outlet 1302 for controlling the filling of the high-pressure CNG air storage tank 1401, the medium-pressure filling control valve b2 is arranged on a pipeline between the CNG air inlet 1301 and the medium-pressure air outlet 1303 for controlling the filling of the medium-pressure CNG air storage tank 1402, and the low-pressure filling control valve b3 is arranged on a pipeline between the CNG air inlet 1301 and the low-pressure air outlet 1304 for controlling the filling of the low-pressure CNG air storage tank 1403. The CNG filling control valve c comprises a high-pressure CNG filling control valve c1, a medium-pressure CNG filling control valve c2 and a low-pressure CNG filling control valve c3 which are arranged in parallel, the high-pressure CNG filling control valve c1 is arranged on a pipeline between the second CNG outlet hole 1306 and the high-pressure outlet hole 1302, the medium-pressure CNG filling control valve c2 is arranged on a pipeline between the second CNG outlet hole 1306 and the medium-pressure outlet hole 1303, and the low-pressure CNG filling control valve c3 is arranged on a pipeline between the second CNG outlet hole 1306 and the low-pressure outlet hole 1304.

When the compressed natural gas filling device is used, the compressed natural gas filling device is filled with Compressed Natural Gas (CNG) by adding the CNG compressor 12, and is filled with Compressed Natural Gas (CNG) by means of the first filling control valve a on the control panel 13, and is filled with Compressed Natural Gas (CNG) from the high-pressure CNG gas storage tank 1401, the medium-pressure CNG gas storage tank 1402 and the low-pressure CNG gas storage tank 1403 sequentially by the second filling control valve b. The inflation sequence into the CNG tank set 14 is as follows: firstly, a high-pressure filling control valve b1 on a control panel 13 is opened, and CNG is filled into a high-pressure CNG storage tank 1401 through a high-pressure air outlet 1302 on the control panel 13; when the CNG pressure in the high-pressure CNG storage tank 1401 reaches a set value in the inflation process, a medium-pressure filling control valve b2 on the control panel 13 is opened, and CNG is inflated to a medium-pressure CNG storage tank 1402 through a medium-pressure air outlet hole 1303 on the control panel 13; when the CNG pressure in the medium-pressure CNG storage tank 1402 reaches a set value in the inflation process, a low-pressure filling control valve b3 on the control panel 13 is opened, and CNG is inflated to the low-pressure CNG storage tank 1403 through a low-pressure air outlet 1304 on the control panel 13; when the CNG pressure in the low-pressure CNG tank 1403 reaches the set value, the high, medium, and low-pressure filling control valves b on the control panel 13 are simultaneously opened, and simultaneously charge the high-pressure CNG tank 1401, the medium-pressure CNG tank 1402, and the low-pressure CNG tank 1403 until the pressure reaches the set maximum value.

When the CNG automobile is filled with gas, the CNG automobile is communicated to a CNG dispenser 15, CNG pressure in an initial state of the CNG automobile is monitored, the pressure is respectively compared with CNG pressures in a high-pressure CNG storage tank 1401, a medium-pressure CNG storage tank 1402 and a low-pressure CNG storage tank 1403, if the pressure is lower than the pressure in the low-pressure CNG storage tank 1403, a low-pressure CNG filling control valve c3 is opened, the CNG automobile is filled with gas through the CNG dispenser 15, if the pressure is balanced or higher than the pressure in the low-pressure CNG storage tank 1403 and lower than the pressure in the medium-pressure CNG storage tank 1402, a medium-pressure CNG filling control valve c2 is opened, the CNG automobile is filled with gas through the CNG dispenser 15, and if the pressure is balanced or higher than the pressure in the medium-pressure CNG storage tank 1402 and lower than the pressure in the high-pressure CNG storage tank 1401, the high-pressure CNG filling control valve c1 is opened, and the CNG automobile is filled with gas through the CNG dispenser 15. According to the utility model, the control panel is used for controlling the filling process of the CNG automobile and the CNG gas cylinder automobile, and when the CNG automobile is filled with gas, the control panel distributes the gas according to the pressure of the CNG gas dispenser and the pressure of the CNG tank group, so that the system is safer and more efficient.

In the utility model, a BOG filtering pressure regulating device 8, a NG filtering pressure regulating device 9 and a metering device 10 are all integral skid-mounted equipment, wherein the BOG filtering pressure regulating device 8 and the NG filtering pressure regulating device 9 are respectively provided with two paths which are arranged in parallel, one path is provided with one path, each path is provided with a filter and a pressure regulator in series, the filter is arranged in front of the pressure regulator, and the filter and the pressure regulator are used for selecting according to the flow and the pressure of gas in a pipeline; the metering device 10 also adopts two paths which are arranged in parallel, one is provided with one device, each path is provided with a flowmeter, and the selection of the flowmeter is carried out according to the gas flow in the pipeline. In addition, a flowmeter can be arranged on the pipeline between the NG filtering pressure regulating device 9 and the buffer tank 11, and is used for metering the filling of the CNG automobile and the CNG gas cylinder.

The utility model integrates LNG storage, LNG filling and outward transportation, pressurized gasification and outward transportation, CNG automobile gas filling and CNG gas cylinder automobile filling, has multiple functions, can be switched and applied according to actual conditions, and improves the turnover utilization rate of LNG.

The utility model is applicable to the prior art where it is not described.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present utility model.

Claims (13)

1. The multifunctional LNG storage and distribution station system comprises an LNG tank car (1) and an LNG storage tank (2), and is characterized by further comprising an NG air temperature type gasifier group (5), a water bath type reheating device (7), an NG filtering pressure regulating device (9), a metering device (10), a buffer tank (11), a CNG compressor (12), a control panel (13), the CNG tank group (14), a CNG air entrainer (15) and a pipe network access port (18), wherein a liquid inlet (21), a first liquid outlet (22), a second liquid outlet (23) and a BOG inlet (24) are formed in the LNG storage tank (2), the LNG tank car (1) is communicated with the liquid inlet (21) through a pipeline, the NG air temperature type gasifier group (5), the water bath type reheating device (7), the NG filtering pressure regulating device (9), the metering device (10) and the pipe network access port (18) are arranged in series, and the inlet of the NG air temperature type gasifier group (5) is connected with the first liquid outlet (22) through a pipeline; the gas outlet of the NG filtering pressure regulating device (9) is divided into two paths, one path is communicated with the metering device (10), and the other path is connected with the buffer tank (11), the CNG compressor (12), the control panel (13), the CNG tank group (14) and the CNG dispenser (15) in series sequentially through pipelines.

2. A multi-functional LNG storage terminal system according to claim 1, characterized in that the outlet of the control panel (13) communicates with a CNG filling port (16).

3. The multifunctional LNG storage terminal system according to claim 1, further comprising a booster gasifier (3) with an inlet connected to a second liquid outlet (23) on the LNG storage tank (2) and an outlet in two ways, one communicating with the LNG tank car (1) and the other communicating with the BOG inlet (24) on the LNG storage tank (2).

4. The multifunctional LNG storage and distribution station system according to claim 1, wherein a BOG inlet and outlet (24) on the LNG storage tank (2) is communicated with an inlet of a BOG air temperature type heater (6), an outlet of the BOG air temperature type heater (6) is divided into two paths, one path is communicated with a BOG filtering pressure regulating device (8), the other path is communicated with a water bath type reheater (7), and an outlet of the BOG filtering pressure regulating device (8) is communicated with a metering device (10).

5. The multifunctional LNG storage terminal system according to claim 4, wherein the water bath type reheater (7) is a ng+bog water bath type heater, on which a NG heating inlet (701), a NG heating outlet (702), a BOG heating inlet (703) and a BOG heating outlet (704) are provided, the NG heating inlet (701) and the NG heating outlet (702) are used as a pair communicated, the BOG heating inlet (703) and the BOG heating outlet (704) are used as a pair communicated, the NG heating inlet (701) and the outlet of the NG air temperature type gasifier group (5) are communicated, the NG heating outlet (702) and the inlet of the NG filtering pressure regulating device (9) are communicated, the BOG heating inlet (703) and the air outlet end of the BOG air temperature regulating device (6) are communicated, and the BOG heating outlet (704) and the air inlet end of the BOG filtering pressure regulating device (8) are communicated.

6. The multifunctional LNG storage station system according to claim 1, wherein a variable-frequency cryogenic pump (4) is arranged on a liquid outlet pipeline of the first liquid outlet (22) of the LNG storage tank (2), a liquid outlet end of the variable-frequency cryogenic pump (4) is divided into two paths, one path is communicated with an inlet of the NG air temperature gasifier group (5) and used for conveying LNG in the LNG storage tank (2) to the NG air temperature gasifier group (5) for gasification, and the other path is communicated with the LNG tank wagon (1) and used for filling LNG liquid in the LNG storage tank (2) into the LNG tank wagon (1).

7. The multi-function LNG storage terminal system of claim 1, wherein the NG air temperature vaporizer group (5) comprises a first NG air temperature vaporizer (501) and a second NG air temperature vaporizer (502) arranged in parallel.

8. The multi-function LNG storage terminal system according to claim 1, wherein the LNG storage tank (2) is one of a primary and secondary tank or a vacuum powder tank.

9. A multi-functional LNG storage terminal system according to claim 3, characterized in that the outlet line of the booster gasifier (3) is provided with a first self-operated regulator valve (301).

10. The multifunctional LNG storage terminal system according to claim 4, wherein the BOG air temperature heater (6) is provided with a second self-operated pressure regulating valve (601) on its inlet line.

11. The multi-functional LNG storage terminal system of claim 1, wherein the CNG tank group (14) includes a high pressure CNG tank (1401), a medium pressure CNG tank (1402) and a low pressure CNG tank (1403).

12. The multifunctional LNG storage and dispensing station system according to claim 11, wherein the control panel (13) is provided with a CNG inlet (1301), a high pressure outlet (1302), a medium pressure outlet (1303), a low pressure outlet (1304), a first CNG outlet (1305) and a second CNG outlet (1306), the CNG inlet (1301) is communicated with the outlet of the CNG compressor (12), the high pressure outlet (1302) is communicated with the high pressure CNG storage tank (1401), the medium pressure outlet (1303) is communicated with the medium pressure CNG storage tank (1402), the low pressure outlet (1304) is communicated with the low pressure CNG storage tank (1403), the first outlet (1305) is communicated with the dispenser (15), and the second CNG outlet (1306) is communicated with the CNG filling port (16).

13. The multifunctional LNG storage terminal system according to claim 12, wherein the control panel (13) is further provided with a first filling control valve (a), a second filling control valve (b) and a CNG filling control valve (c);

the first filling control valve (a) is arranged on a pipeline between the CNG inlet hole (1301) and the first CNG outlet hole (1305) and is used for controlling filling of the CNG gas cylinder vehicle; simultaneously, the first filling control valve (a) is respectively communicated with an outlet of the CNG compressor (12) and a CNG filling port (16);

the second filling control valve (b) comprises a high-pressure filling control valve (b 1), a medium-pressure filling control valve (b 2) and a low-pressure filling control valve (b 3) which are arranged in parallel, wherein the high-pressure filling control valve (b 1) is arranged on a pipeline between a CNG air inlet hole (1301) and a high-pressure air outlet hole (1302) and is used for controlling the filling of the high-pressure CNG air storage tank (1401), the medium-pressure filling control valve (b 2) is arranged on a pipeline between the CNG air inlet hole (1301) and a medium-pressure air outlet hole (1303) and is used for controlling the filling of the medium-pressure CNG air storage tank (1402), and the low-pressure filling control valve (b 3) is arranged on a pipeline between the CNG air inlet hole (1301) and the low-pressure air outlet hole (1304) and is used for controlling the filling of the low-pressure CNG air storage tank (1403); simultaneously, the second filling control valve (b) is respectively communicated with an outlet of the CNG compressor (12) and the CNG tank group (14);

the CNG gas filling control valve (c) comprises a high-pressure CNG gas filling control valve (c 1), a medium-pressure CNG gas filling control valve (c 2) and a low-pressure CNG gas filling control valve (c 3) which are arranged in parallel, the high-pressure CNG gas filling control valve (c 1) is arranged on a pipeline between a second CNG gas outlet hole (1306) and a high-pressure gas outlet hole (1302), the medium-pressure CNG gas filling control valve (c 2) is arranged on a pipeline between the second CNG gas outlet hole (1306) and a medium-pressure gas outlet hole (1303), and the low-pressure CNG gas filling control valve (c 3) is arranged on a pipeline between the second CNG gas outlet hole (1306) and the low-pressure gas outlet hole (1304); meanwhile, the CNG filling control valve (c) is respectively communicated with the air inlet end of the CNG filling machine (15) and the CNG tank group (14).