CN205278760U - Filling system of LNG accepting station - Google Patents

Abstract

The utility model relates to a filling system of LNG accepting station, it includes that LNG storage tank, LNG low -lift pump, low temperature pipeline, filling machine, LNG flow control valve, cold insulation circulating line, LNG return flow control valve, BOG pipeline and LNG tank wagon loading house steward, be provided with the LNG low -lift pump in the LNG storage tank, the filling unit is connected through the low temperature pipeline to the export of LNG low -lift pump, the filling unit is become by a plurality of filling mechanisms, and each annotates quick -witted coordination on the low temperature pipeline, and the low temperature pipeline of filling unit is terminal to be connected with cold insulation circulating line one end, and the cold insulation circulating line other end is connected with the LNG storage tank, and the fuel jar is connected with the filling machine in the automobile, respectively annotate quick -witted exit end through BOG small transfer line parallel connection on the BOG pipeline, BOG pipeline exit end connection BOG recovery system fails the system outside perhaps, the LNG storage tank is through BOG pipeline lug connection BOG recovery system or the outer system that fails, the export of LNG low -lift pump is through the total union coupling LNG tank wagon of LNG tank wagon loading, the utility model discloses a to filling of air entrainment vehicle and the filling of LNG tank wagon.

Description

A kind of LNG receiving station adds injection system

Technical field

The utility model relates to a kind of LNG and adds injection system, particularly adds injection system about a kind of LNG receiving station used in energy field.

Background technology

At present, China's natural gas market is fast-developing, and the ratio of Sweet natural gas shared by power supply increases sharply, and the contradiction of natural gas supply deficiency is more and more obvious. LNG (natural gas liquids) output just grows at top speed with the speed of annual about 12%, becomes and increases one of the swiftest and the most violent energy industry, and LNG receiving station has also started construction upsurge.

Outer defeated and outer defeated two kinds of the LNG tank car of the processing mode gasification of the LNG of general LNG receiving station. Gasification outer defeated be delivered to the LNG in storage tank after the BOG (boil-off gas) that condenser obtains with flash distillation mixes by low-pressure pump in tank to enter high-pressure pump defeated house steward outward, afterwards by the gasifier such as ORV (open-shelf gasifier), SCV (submerged combustion gasifier), IFV (intermediate medium gasifier) by high pressure LNG gasification, after reaching outer gas transmission body pressure requirements, directly deliver to gas line network. Defeated outside LNG tank car is, by low-pressure pump in tank, LNG is delivered to the outer defeated house steward of tank car, returns gas arm by LNG filling arm and BOG and is connected with LNG tank car, and the volume of LNG tank car storage tank is about 52.6-56m³, when current each receiving station requires that LNG tank car enters the station, the pressure of storage tank is generally 0.15-0.35MPa, and the BOG simultaneously not accepting tank car returns gas.

The outer transmission method of above-mentioned two kinds of traditional LNG does not have to consider to realize in receiving station to the technical process annotated using LNG as the engineering truck of fuel in the district of port or neighboring area. In sum, conventional art causes on the one hand the limited situation of the utilization of low-pressure stage LNG in receiving station station, LNG fuel vehicle in following port district and LNG tank car also get more and more in addition, original technique does not consider the actual demand that LNG annotates directly to automobile as fuel to have technical limitation.

Summary of the invention

For the problems referred to above, the purpose of this utility model is to provide a kind of LNG receiving station and adds injection system, and it effectively make use of LNG, it is achieved that the filling of aerating vehicle and LNG tank car is filling.

For achieving the above object, the utility model takes following technical scheme: a kind of LNG receiving station adds injection system, it is characterised in that: it comprises LNG storage tank, LNG low-pressure pump, cryogenic piping, filling unit, LNG stream adjustable valve, protects SAPMAC method pipeline, LNG return flow variable valve and LNG tank car entrucking house steward; Being provided with described LNG low-pressure pump in described LNG storage tank, the outlet of described LNG low-pressure pump connects described filling unit through described cryogenic piping; Described filling unit is made up of some charging machines, each described charging machine is connected on described cryogenic piping side by side, the described cryogenic piping connected between described LNG low-pressure pump and described filling unit is provided with described LNG stream adjustable valve, the described cryogenic piping end of described filling unit is connected with described guarantor's SAPMAC method pipeline one end, described guarantor's SAPMAC method pipeline the other end is connected with described LNG storage tank, is provided with described LNG return flow variable valve on described guarantor's SAPMAC method pipeline; In automobile, tanks is connected with described charging machine, and described LNG storage tank directly connects BOG recovery system or outer communication system through described BOG pipeline; The outlet of described LNG low-pressure pump connects LNG tank car through described LNG tank car entrucking house steward.

Preferably, the exit end of each described charging machine is connected in parallel on described BOG pipeline through BOG small transfer line, and described BOG pipe outlet connects described BOG recovery system or outer communication system;

Preferably, the described BOG pipeline between each described BOG small transfer line meet and described BOG recovery system or outer communication system is also disposed with BOG surge tank and BOG return flow variable valve, bottom described BOG surge tank, is provided with liquid collecting tank.

Preferably, described cryogenic piping between described LNG low-pressure pump and described filling unit is provided with thermometer and tensimeter.

Preferably, described BOG pipeline between described BOG return flow variable valve and described BOG recovery system or outer communication system is provided with thermometer and tensimeter.

Preferably, the entrance end of charging machine described in each in described filling unit and exit end are all provided with valve.

The utility model is owing to taking above technical scheme, and it has the following advantages: 1, the utility model utilizes the low pressure LNG pump in 30,000 sides/160,000 sides/220,000 side's storage tanks to realize the process that the filling of aerating vehicle and LNG tank car is filling. 2, the utility model both maximum degree make use of the energy of low pressure LNG, open again the new approaches that LNG receives outer defeated utilization. 3, the utility model decreases the associated cost building separately LNG filling station, accelerates the application of clean energy simultaneously.

Accompanying drawing explanation

Fig. 1 is the process flow diagram that the utility model LNG receiving station adds injection system.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in detail.

As shown in Figure 1, the utility model provides a kind of LNG receiving station to add injection system, and it comprises LNG storage tank 1, LNG low-pressure pump 2, cryogenic piping 3, charging machine 4, LNG stream adjustable valve 5, protects SAPMAC method pipeline 6, LNG return flow variable valve 7, BOG pipeline 8, BOG surge tank 9, BOG return flow variable valve 10, liquid collecting tank 11 and LNG tank car entrucking house steward 12. LNG low-pressure pump 2 it is provided with in LNG storage tank 1, LNG low-pressure pump 2 exports and connects filling unit through cryogenic piping 3, filling unit is made up of some charging machines 4, each charging machine 4 is connected on cryogenic piping 3 side by side, the cryogenic piping 3 connected between LNG low-pressure pump 2 and filling unit is provided with LNG stream adjustable valve 5, cryogenic piping 3 end of filling unit is connected with guarantor SAPMAC method pipeline 6 one end, protect SAPMAC method pipeline 6 the other end to be connected with LNG storage tank 1, guarantor's SAPMAC method pipeline 6 is provided with LNG return flow variable valve 7, is automobile filling LNG by each charging machine 4, the BOG gas of High Temperature High Pressure in tanks in automobile, under pressure difference, BOG gas flows in charging machine 4, the exit end of each charging machine 4 is connected in parallel on BOG pipeline 8 through BOG small transfer line, BOG pipeline 8 exit end connects BOG recovery system or outer communication system, BOG pipeline 8 between each BOG small transfer line meet and BOG recovery system or outer communication system is also disposed with and bottom BOG surge tank 9 and BOG return flow variable valve 10, BOG surge tank 9, is provided with liquid collecting tank 11. LNG storage tank 1 directly connects BOG recovery system or outer communication system through BOG pipeline 8, LNG low-pressure pump 2 exports and connects LNG tank car through LNG tank car entrucking house steward 12. when LNG tank car is filling, the LNG pumped by LNG low-pressure pump 2 is filling directly to LNG tank car through low LNG tank car entrucking house steward 12. during automobile filling LNG, automobile has in tanks the BOG gas of High Temperature High Pressure, under pressure difference, BOG gas is introduced in charging machine 4, BOG pipeline 8 is entered through BOG small transfer line from charging machine 4 exit end, the pressure of BOG gas is reduced through BOG surge tank 9, liquid collecting tank 11 collects the liquid in BOG surge tank 9, BOG return flow variable valve 10 regulates flow and the pressure of BOG gas, pressure in automotive fuel tank is higher, a large amount of high pressure-temperature BOG gas will return in receiving station's BOG treatment system, BOG returning air-flow journey is set up BOG surge tank 9 and liquid collecting tank 11, avoid the BOG of high pressure-temperature to the impact of original pipeline and full factory low pressure BOG system, BOG gas is transported to BOG recovery system or outer communication system by BOG pipeline 8 by the BOG gas in charging machine 4, as the 0.4-0.5MPaG lower than the pressure in charging machine 4 of the equilibrium pressure in tanks in automobile, start to be annotated by automobile LNG, the LNG pumped by LNG low-pressure pump 2 through cryogenic piping 3 under LNG stream adjustable valve 5 acts on, enter in charging machine 4, charging machine 4 carries out to automobile filling LNG, the LNG not annotated, under LNG return flow variable valve 7 regulates, returns in storage tank 1 by protecting SAPMAC method pipeline 6, completes the filling to automobile.

In above-described embodiment, the cryogenic piping 3 between LNG low-pressure pump 2 and filling unit is provided with thermometer 13 and tensimeter 14, for temperature and the pressure of LNG in Real-Time Monitoring cryogenic piping 3.

In the various embodiments described above, the BOG pipeline 8 between BOG return flow variable valve 10 and BOG recovery system or outer communication system is provided with thermometer 13 and tensimeter 14, the temperature of BOG gas and pressure in Real-Time Monitoring BOG pipeline 8.

In the various embodiments described above, the entrance end of each charging machine 4 and exit end in filling unit are all provided with valve 15, for connection and the disconnection of each charging machine 4 and cryogenic piping 3, in order to avoid fault occurs charging machine 4, cause LNG to leak.

In the various embodiments described above, BOG recovery system or outer communication system are the BOG gas reclaimed in automobile in tanks and storage tank 1, have the effect balancing whole filling system pressure simultaneously.

The utility model adds injection system based on above-mentioned, also provides a kind of to the charging method of LNG tank car and automobile, and its step is as follows:

1) LNG tank car entrucking house steward 12 is directly connected with LNG tank car, regulates LNG stream adjustable valve 5, the LNG in LNG storage tank 1 is pumped by LNG low-pressure pump 2, filling directly to LNG tank car through LNG tank car entrucking house steward 12;

2) tanks in automobile is connected with arbitrary charging machine 4, has the BOG gas of High Temperature High Pressure in automobile in tanks, and in automobile, the BOG gas in tanks enters in corresponding charging machine 4;

3) the BOG gas in charging machine 4 enters in BOG small transfer line through the exit end of charging machine 4, and BOG gas flows into BOG pipeline 8 by BOG small transfer line, through BOG surge tank 9 and BOG return flow variable valve 10 in BOG pipeline 8;

4) after BOG return flow variable valve 10 regulates, BOG gas enters BOG recovery system or outer communication system, and the LNG that the LNG low-pressure pump 2 in storage tank 1 pumps enters in filling unit through low pressure pipeline 3;

5) LNG in charging machine 4 is under the common adjustment of LNG stream adjustable valve 5 and LNG return flow variable valve 7, it is achieved charging machine 4 is to automobile filling, and by protecting, SAPMAC method pipeline 6 returns in storage tank 1 LNG simultaneously not annotated, and completes to annotate LNG to automobile.

The various embodiments described above are only for illustration of the utility model; structure, the size of each parts, position is set and shape all can change to some extent; on the basis of technical solutions of the utility model; all improvement of being carried out by indivedual parts according to the utility model principle and equivalents, all should not get rid of outside protection domain of the present utility model.

Claims (6)

1. a LNG receiving station adds injection system, it is characterised in that: it comprises LNG storage tank, LNG low-pressure pump, cryogenic piping, filling unit, LNG stream adjustable valve, protects SAPMAC method pipeline, LNG return flow variable valve and LNG tank car entrucking house steward; Being provided with described LNG low-pressure pump in described LNG storage tank, the outlet of described LNG low-pressure pump connects described filling unit through described cryogenic piping; Described filling unit is made up of some charging machines, each described charging machine is connected on described cryogenic piping side by side, the described cryogenic piping connected between described LNG low-pressure pump and described filling unit is provided with described LNG stream adjustable valve, the described cryogenic piping end of described filling unit is connected with described guarantor's SAPMAC method pipeline one end, described guarantor's SAPMAC method pipeline the other end is connected with described LNG storage tank, is provided with described LNG return flow variable valve on described guarantor's SAPMAC method pipeline; In automobile, tanks is connected with described charging machine, and described LNG storage tank directly connects BOG recovery system or outer communication system through BOG pipeline; The outlet of described LNG low-pressure pump connects LNG tank car through described LNG tank car entrucking house steward.

2. a kind of LNG receiving station as claimed in claim 1 adds injection system, it is characterised in that: the exit end of each described charging machine is connected in parallel on described BOG pipeline through BOG small transfer line, and described BOG pipe outlet connects described BOG recovery system or outer communication system.

3. a kind of LNG receiving station as claimed in claim 2 adds injection system, it is characterized in that: the described BOG pipeline between each described BOG small transfer line meet and described BOG recovery system or outer communication system is also disposed with BOG surge tank and BOG return flow variable valve, bottom described BOG surge tank, is provided with liquid collecting tank.

4. a kind of LNG receiving station as described in item as arbitrary in claim 1-3 adds injection system, it is characterised in that: the described cryogenic piping between described LNG low-pressure pump and described filling unit is provided with thermometer and tensimeter.

5. a kind of LNG receiving station as described in item as arbitrary in claim 1-3 adds injection system, it is characterised in that: the described BOG pipeline between described BOG return flow variable valve and described BOG recovery system or outer communication system is provided with thermometer and tensimeter.

6. a kind of LNG receiving station as described in item as arbitrary in claim 1-3 adds injection system, it is characterised in that: entrance end and the exit end of charging machine described in each in described filling unit are all provided with valve.