CN219606738U

CN219606738U - LNG filling line

Info

Publication number: CN219606738U
Application number: CN202223570808.2U
Authority: CN
Inventors: 张虎林; 富九译; 李刚; 武拯; 鲍晓波; 吴鹏; 张永祥; 马杰
Original assignee: Inner Mongolia Wanrui Natural Gas Co ltd
Current assignee: Inner Mongolia Wanrui Natural Gas Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-08-29
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses an LNG filling line, which comprises an LNG filling assembly, wherein the LNG filling assembly comprises an LNG storage tank, a base, an LNG loading sled and a sled liquid-phase tube; the recovery pipeline mechanism comprises a nitrogen tank, an electromagnetic valve, a gas pipe, a liquid phase recovery pipe, a pressure regulating valve and an electric three-way valve; the LNG storage tank is fixedly connected to one side of the upper surface of the base. According to the utility model, nitrogen stored in the nitrogen tank is led out into the gas transmission pipe through the electromagnetic valve, then the nitrogen is led into the liquid phase pipe of the skid-mounted liquid phase pipe through the gas transmission pipe for pressurizing and cooling treatment in the liquid phase pipe of the skid-mounted liquid phase pipe and the LNG truck-mounted skid, then the liquid phase recovery pipe is opened through the electric three-way valve, and then the residual LNG in the liquid phase pipe of the skid-mounted liquid phase pipe and the LNG truck-mounted skid is led back into the LNG storage tank through the liquid phase recovery pipe under the action of pressure so as to recycle the residual LNG, thereby improving the utilization rate of resources and avoiding a large amount of waste.

Description

LNG filling line

Technical field:

the utility model relates to a filling pipeline, in particular to an LNG filling pipeline, and belongs to the technical field of liquefied natural gas production.

The background technology is as follows:

the main component of the liquefied natural gas is methane, which is recognized as the cleanest fossil energy source on the earth, the volume of the liquefied natural gas is about 1/625 of the volume of the same amount of gaseous natural gas, the mass of the liquefied natural gas is only about 45% of the volume of water, the natural gas produced by a gas field is purified, the liquefied natural gas is transported by a liquefied natural gas ship after being liquefied at a series of ultralow temperatures, the pollution to the air is very small after the liquefied natural gas is combusted, and the heat emitted is large, so the liquefied natural gas is a cleaner energy source, the LNG filling is one of the end procedures of the liquefied natural gas production, and the produced liquefied natural gas is filled into a storage device by mainly using a loading sled so as to transport the liquefied natural gas;

traditional LNG filling pipeline utilizes the loading sled to carry out the back of filling operation, can remaining partial LNG in the loading sled liquid phase pipeline, and this partial LNG can only release to torch department through the bleeder pipe and discharge, can't retrieve it and recycle, and for this reason, proposes an LNG filling pipeline.

The utility model comprises the following steps:

the present utility model is directed to an LNG filling line to solve one of the problems set forth in the background art.

The utility model is implemented by the following technical scheme: an LNG filling line comprising

The LNG filling assembly comprises an LNG storage tank, a base, an LNG truck sled and a sled liquid tube;

the recovery pipeline mechanism comprises a nitrogen tank, an electromagnetic valve, a gas pipe, a liquid phase recovery pipe, a pressure regulating valve and an electric three-way valve;

LNG storage tank fixed connection in upper surface one side of base, LNG loading sled fixed connection in the upper surface opposite side of base, loading sled liquid phase pipe communicate in the air inlet of LNG loading sled, the nitrogen gas jar install in the base upper surface is close to one side of LNG storage tank, the solenoid valve install in the gas vent of nitrogen gas jar, the gas-supply pipe communicate in the one end that the nitrogen gas jar was kept away from to the solenoid valve, electronic three-way valve communicate in the bottom of LNG loading sled, liquid phase recovery pipe communicate in the one end that electronic three-way valve is close to the gas-supply pipe, the air-vent valve install in the lateral wall of liquid phase recovery pipe.

As a further preferred aspect of the present utility model: one end of the air pipe, which is far away from the electromagnetic valve, is communicated with a one-way valve, and one end of the one-way valve, which is far away from the air pipe, is communicated with the outer side wall of the skid-mounted liquid phase pipe.

As a further preferred aspect of the present utility model: one end of the liquid phase recovery pipe, which is far away from the electric three-way valve, is communicated with the inside of the LNG storage tank, and one end of the electric three-way valve, which is far away from the liquid phase recovery pipe, is communicated with a discharge pipe.

As a further preferred aspect of the present utility model: the low-temperature immersed pump is installed at the bottom of the inner side wall of the LNG storage tank, and one end of the skid-mounted liquid phase pipe is communicated with a water outlet of the low-temperature immersed pump.

As a further preferred aspect of the present utility model: the intelligent LNG storage tank is characterized in that an electric cabinet is arranged in the middle of the outer side wall of the LNG storage tank, and a touch screen is arranged on one side, away from the LNG storage tank, of the electric cabinet.

As a further preferred aspect of the present utility model: the PLC controller is installed at the inside wall top of electric cabinet, the relay is evenly installed to the inside wall bottom of electric cabinet.

As a further preferred aspect of the present utility model: and a pressure release valve is arranged at the top of the outer side wall of the LNG storage tank.

As a further preferred aspect of the present utility model: the signal output end of the touch screen is electrically connected to the signal input end of the PLC controller through a wire, the electrical output end of the PLC controller is electrically connected to the electrical input end of the relay through a wire, and the electrical output end of the relay is electrically connected to the electrical input ends of the electromagnetic valve and the electric three-way valve through a wire.

The utility model has the advantages that: according to the utility model, nitrogen stored in the nitrogen tank is led out into the gas transmission pipe through the electromagnetic valve, then the nitrogen is led into the liquid phase pipe of the skid-mounted liquid phase pipe through the gas transmission pipe for pressurizing and cooling treatment in the liquid phase pipe of the skid-mounted liquid phase pipe and the LNG truck-mounted skid, then the liquid phase recovery pipe is opened through the electric three-way valve, and then the residual LNG in the liquid phase pipe of the skid-mounted liquid phase pipe and the LNG truck-mounted skid is led back into the LNG storage tank through the liquid phase recovery pipe under the action of pressure so as to recycle the residual LNG, thereby improving the utilization rate of resources and avoiding a large amount of waste.

Description of the drawings:

in order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic diagram of the axial side structure of the LNG tank of the present utility model;

fig. 4 is a schematic cross-sectional view of the electric cabinet of the present utility model.

In the figure: 1. an LNG filling assembly; 2. a recovery pipeline mechanism; 101. an LNG storage tank; 102. a base; 103. LNG loading pry; 104. a liquid phase tube is arranged; 201. a nitrogen tank; 202. an electromagnetic valve; 203. a gas pipe; 204. a liquid phase recovery pipe; 205. a pressure regulating valve; 206. an electric three-way valve; 41. a bleed tube; 42. a pressure release valve; 43. a one-way valve; 44. an electric control box; 45. a touch screen; 46. a PLC controller; 47. a relay; 48. low temperature immersed pump.

The specific embodiment is as follows:

the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

Examples

Referring to fig. 1-4, the present utility model provides a technical solution: an LNG filling line comprising

The LNG filling assembly 1, the LNG filling assembly 1 comprises an LNG storage tank 101, a base 102, an LNG truck sled 103 and a sled liquid tube 104;

a recovery line mechanism 2, the recovery line mechanism 2 comprising a nitrogen tank 201, a solenoid valve 202, a gas pipe 203, a liquid phase recovery pipe 204, a pressure regulating valve 205 and an electric three-way valve 206;

LNG storage tank 101 fixed connection is in upper surface one side of base 102, LNG loading sled 103 fixed connection is in the upper surface opposite side of base 102, loading sled liquid phase pipe 104 communicates in the air inlet of LNG loading sled 103, nitrogen tank 201 installs in the one side that the base 102 upper surface is close to LNG storage tank 101, solenoid valve 202 installs in the gas vent of nitrogen tank 201, gas-supply pipe 203 communicates in solenoid valve 202 and keeps away from the one end of nitrogen tank 201, electronic three-way valve 206 communicates in the bottom of LNG loading sled 103, liquid phase recovery pipe 204 communicates in the one end that electronic three-way valve 206 is close to gas-supply pipe 203, air-vent valve 205 installs in the lateral wall of liquid phase recovery pipe 204.

In this embodiment, specific: one end of the air pipe 203, which is far away from the electromagnetic valve 202, is communicated with a one-way valve 43, and one end of the one-way valve 43, which is far away from the air pipe 203, is communicated with the outer side wall of the prying liquid phase pipe 104; reverse flow of the liquid-phase LNG in the pick-up liquid-phase pipe 104 is prevented by the check valve 43.

In this embodiment, specific: one end of the liquid phase recovery pipe 204, which is far away from the electric three-way valve 206, is communicated with the inside of the LNG storage tank 101, and one end of the electric three-way valve 206, which is far away from the liquid phase recovery pipe 204, is communicated with the discharge pipe 41; the residual gas in the LNG carrier skid 103 and the skid liquid phase pipe 104 is discharged to the flare through the bleed pipe 41.

In this embodiment, specific: the low-temperature immersed pump 48 is arranged at the bottom of the inner side wall of the LNG storage tank 101, and one end of the skid-mounted liquid pipe 104 is communicated with a water outlet of the low-temperature immersed pump 48; LNG stored in LNG storage tank 101 is discharged into LNG loading skid 103 by cryogenic immersed pump 48 using skid liquid pipe 104.

In this embodiment, specific: the top of the outer side wall of the LNG storage tank 101 is provided with a pressure relief valve 42; the LNG tank 101 is depressurized by the pressure relief valve 42.

In this embodiment, specific: an electric cabinet 44 is arranged in the middle of the outer side wall of the LNG storage tank 101, a touch screen 45 is arranged on one side, far away from the LNG storage tank 101, of the electric cabinet 44, a PLC (programmable logic controller) 46 is arranged on the top of the inner side wall of the electric cabinet 44, a relay 47 is uniformly arranged at the bottom of the inner side wall of the electric cabinet 44, the signal output end of the touch screen 45 is electrically connected to the signal input end of the PLC 46 through a wire, the electrical output end of the PLC 46 is electrically connected to the electrical input end of the relay 47 through a wire, and the electrical output end of the relay 47 is electrically connected to the electrical input ends of the electromagnetic valve 202 and the electric three-way valve 206 through a wire; the PLC controller 46 receives data of the touch screen 45, and the electromagnetic valve 202 and the electric three-way valve 206 are controlled to be opened and closed through the relay 47.

In this embodiment, specific: the model of the touch screen 45 is AML500J01Z-00; the model of the PLC controller 46 is DF-96D.

Principle of operation or principle of structure: when in use, the LNG stored in the LNG storage tank 101 is discharged into the LNG loading sled 103 through the low-temperature immersed pump 48 by utilizing the loading sled liquid phase pipe 104, so that the LNG loading sled 103 is used for loading, after the loading operation is completed, a control instruction is input into the PLC controller 46 through the touch screen 45, then the PLC controller 46 sequentially starts the operation of the electromagnetic valve 202 and the electric three-way valve 206 according to the instruction by utilizing the relay 47, the working electromagnetic valve 202 opens the vent of the nitrogen tank 201, nitrogen stored in the nitrogen tank 201 is discharged into the loading sled liquid phase pipe 104 through the gas transmission pipe 203, the liquid phase LNG in the loading sled liquid phase pipe 104 is prevented from flowing reversely through the arranged one-way valve 43, so that the pressurizing and cooling treatment is carried out on the LNG remained in the loading sled 104 and the LNG loading sled 103, then one end of the liquid phase recovery pipe 204 is opened through the working electric three-way valve 206, then through liquid phase recovery pipe 204 under the effect of pressure, with the liquid phase LNG of dress sled liquid phase pipe 104 and LNG loading sled 103 interior residual is led back to the inside of LNG storage tank 101, so that retrieve the recycle to remaining LNG, the utilization ratio of resource has been improved, avoid causing a large amount of waste, carry out the decompression protection in for liquid phase recovery pipe 204 through the air-vent valve 205 that sets up, protect for LNG storage tank 101 decompression through the relief valve 42 that sets up, avoid causing the incident because of the pressure is too high, after the recovery of remaining liquid phase LNG in dress sled liquid phase pipe 104 and the LNG loading sled 103 is accomplished, will utilize relay 47 to close solenoid valve 202 through PLC controller 46, and start electronic three-way valve 206 opens bleeder 41, then discharge the gas discharge torch department of the interior residual of LNG loading sled 103 and dress sled liquid phase pipe 104 through bleeder 41, and then whole filling operation has been accomplished.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. An LNG fill line comprising

The LNG filling assembly (1), the LNG filling assembly (1) comprises an LNG storage tank (101), a base (102), an LNG truck pick (103) and a pick-up liquid phase pipe (104);

a recovery line mechanism (2), wherein the recovery line mechanism (2) comprises a nitrogen tank (201), an electromagnetic valve (202), a gas pipe (203), a liquid phase recovery pipe (204), a pressure regulating valve (205) and an electric three-way valve (206);

LNG storage tank (101) fixed connection in upper surface one side of base (102), LNG loading sled (103) fixed connection in the upper surface opposite side of base (102), dress sled liquid phase pipe (104) communicate in the air inlet of LNG loading sled (103), nitrogen gas jar (201) install in one side that base (102) upper surface is close to LNG storage tank (101), solenoid valve (202) install in the gas vent of nitrogen gas jar (201), gas pipe (203) communicate in one end that nitrogen gas jar (201) was kept away from to solenoid valve (202), electronic three-way valve (206) communicate in the bottom of LNG loading sled (103), liquid phase recovery pipe (204) communicate in one end that electronic three-way valve (206) is close to gas pipe (203), air-vent valve (205) install in the lateral wall of liquid phase recovery pipe (204).

2. The LNG fill line of claim 1, wherein: one end of the air pipe (203) far away from the electromagnetic valve (202) is communicated with a one-way valve (43), and one end of the one-way valve (43) far away from the air pipe (203) is communicated with the outer side wall of the prying liquid phase pipe (104).

3. The LNG fill line of claim 1, wherein: one end of the liquid phase recovery pipe (204) far away from the electric three-way valve (206) is communicated with the inside of the LNG storage tank (101), and one end of the electric three-way valve (206) far away from the liquid phase recovery pipe (204) is communicated with a discharge pipe (41).

4. The LNG fill line of claim 1, wherein: the low-temperature immersed pump (48) is installed at the bottom of the inner side wall of the LNG storage tank (101), and one end of the skid-mounted liquid phase pipe (104) is communicated with a water outlet of the low-temperature immersed pump (48).

5. The LNG fill line of claim 1, wherein: the LNG storage tank (101) lateral wall mid-mounting has electric cabinet (44), touch screen (45) are installed to one side that LNG storage tank (101) was kept away from to electric cabinet (44).

6. The LNG fill line of claim 5, wherein: the PLC controller (46) is installed at the inside wall top of electric cabinet (44), relay (47) are evenly installed to inside wall bottom of electric cabinet (44).

7. The LNG fill line of claim 1, wherein: and a pressure relief valve (42) is arranged at the top of the outer side wall of the LNG storage tank (101).

8. The LNG fill line of claim 6, wherein: the signal output end of the touch screen (45) is electrically connected to the signal input end of the PLC (46) through a wire, the electrical output end of the PLC (46) is electrically connected to the electrical input end of the relay (47) through a wire, and the electrical output end of the relay (47) is electrically connected to the electrical input ends of the electromagnetic valve (202) and the electric three-way valve (206) through a wire.