Liquid hydrocarbon loading arm residual liquid emptying system

Abstract

The utility model discloses a liquid hydrocarbon loading crane pipe residual liquid emptying system which comprises a liquid phase discharge flare line and a gas phase discharge flare line. The outlet ends of the liquid-phase flare releasing line and the gas-phase flare releasing line are connected with the flare releasing line, and the inlet ends of the liquid-phase flare releasing line and the gas-phase flare releasing line are provided with a liquid-phase flare releasing pipeline quick connector and a gas-phase flare releasing pipeline quick connector respectively; the liquid-phase torch releasing pipeline quick connector and the gas-phase torch releasing pipeline quick connector are respectively connected with a liquid-phase emptying hose with a quick connector and a gas-phase emptying hose with a quick connector; and the other end of the liquid phase emptying hose with the quick joint and the other end of the gas phase emptying hose with the quick joint are respectively connected with a loading arm liquid phase emptying quick joint and a loading arm gas phase emptying quick joint of the loading arm. According to the utility model, the explosion risk caused by volatilization of the liquid hydrocarbon after loading is avoided, residues in the loading arm after loading are emptied as much as possible, the leakage is reduced, and the safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical oil loading, and relates to a residual liquid venting system for a crane pipe of a liquid hydrocarbon loading vehicle. Background Art

[0002] Liquid hydrocarbons refer to hydrocarbon liquids and other similar liquids with a vapor pressure greater than 0.1MPa at 15°C. Liquid hydrocarbons are easily vaporized at room temperature and pressure. Liquid hydrocarbons are released into the air in gaseous form and mix with the air, which can easily cause explosions. Therefore, liquid hydrocarbons are loaded in a closed manner. However, after the loading of liquid hydrocarbons is completed and the tank truck and the crane are disconnected, a small amount of liquid hydrocarbons remain between the liquid phase valve of the tank truck and the liquid phase valve of the loading crane. This part of liquid hydrocarbons is directly exposed to the atmosphere and is easy to evaporate and spread, posing an explosion hazard. In order to avoid the risk of explosion caused by the volatilization of liquid hydrocarbons after loading, it is necessary to solve the problem of venting the residual liquid in the liquid hydrocarbon loading crane. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology, the utility model provides a system for venting residual liquid in the crane pipe of liquid hydrocarbon loading, with the purpose of venting the residue in the crane pipe after loading as much as possible to reduce leakage and improve safety in order to avoid the risk of explosion caused by volatilization of liquid hydrocarbon after loading.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A residual liquid venting system for a crane pipe of a liquid hydrocarbon loading vehicle comprises a liquid phase flare venting line and a gas phase flare venting line; the outlet ends of the liquid phase flare venting line and the gas phase flare venting line are both connected to a flare venting line, and the inlet ends thereof are respectively provided with a liquid phase flare venting pipeline quick connector and a gas phase flare venting pipeline quick connector; the liquid phase flare venting pipeline quick connector and the gas phase flare venting pipeline quick connector are respectively connected to a liquid phase venting hose with a quick connector and a gas phase venting hose with a quick connector; the other ends of the liquid phase venting hose with a quick connector and the gas phase venting hose with a quick connector are respectively connected to the crane pipe liquid phase venting quick connector and the crane pipe gas phase venting quick connector of the crane pipe.

[0006] As a further optimization, the crane pipe liquid phase venting quick connector and the crane pipe gas phase venting quick connector are respectively connected to the ends of the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline; the other ends of the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline are respectively connected to the delivery pipe between the crane pipe liquid phase valve and the crane pipe liquid phase quick connector and the output pipe between the crane pipe gas phase valve and the crane pipe gas phase quick connector, which are respectively used to obtain liquid phase residue and gas phase residue from the ends of the liquid phase and gas phase output of the crane pipe.

[0007] As a further optimization, a liquid phase flare valve and a gas phase flare valve are provided on the liquid phase flare line and the gas phase flare line respectively.

[0008] As a further optimization, the crane pipe liquid phase quick connector and the crane pipe gas phase quick connector are respectively used to connect the tanker liquid phase quick connector and the tanker gas phase quick connector of the liquid hydrocarbon tanker.

[0009] As a further optimization, the liquid phase pipeline input end and the gas phase pipeline input end of the crane pipe are respectively provided with a crane pipe liquid phase port root valve and a crane pipe gas phase port root valve.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) By obtaining the liquid phase residue and the gas phase residue from the end of the liquid phase and gas phase output of the crane pipe, the crane pipe can be completely emptied, the venting effect is good, and less residue is released into the air.

[0012] (2) Both the liquid phase flare line and the gas phase flare line are connected to the crane pipe through a hose, so that when the output end of the crane pipe moves, the liquid phase and gas phase venting pipelines are always connected to the crane pipe, ensuring airtightness, avoiding frequent disassembly and assembly of joints, reducing the possibility of leakage, and improving safety.

[0013] In short, this system avoids the risk of explosion caused by the volatilization of liquid hydrocarbons after loading, vents the residues in the crane pipe after loading as much as possible, reduces leakage and improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system structure of the utility model.

[0015] In the figure: 1. Liquid hydrocarbon loading crane pipe; 2. Root valve of crane pipe liquid phase port; 3. Liquid phase loading line; 4. Root valve of crane pipe gas phase port; 5. Gas phase return line; 6. Crane pipe liquid phase valve; 7. Crane pipe liquid phase quick connector; 8. Crane pipe liquid phase vent valve; 9. Crane pipe liquid phase vent quick connector; 10. Liquid phase vent hose with quick connector; 11. Liquid phase flare torch pipeline quick connector; 12. Liquid phase flare torch line; 13. Liquid phase flare torch valve; 14. Crane pipe gas phase valve; 15. Crane pipe gas phase quick connector ; 16. Crane pipe gas phase vent valve; 17. Crane pipe gas phase vent quick connector; 18. Gas phase vent hose with quick connector; 19. Gas phase flare pipeline quick connector; 20. Gas phase flare line; 21. Gas phase flare valve; 22. Flare vent line; 23. Tank truck liquid phase quick connector; 24. Tank truck liquid phase valve; 25. Tank truck gas phase quick connector; 26. Tank truck gas phase valve; 27. Liquid hydrocarbon tank truck; wherein, the figure mark 100 indicates that the equipment in the box is brought by the crane pipe main body equipment. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings of the present invention. Those skilled in the art should understand that these implementation modes are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0017] Example 1: Please refer to Figure 1 ;

[0018] A residual liquid venting system for a crane pipe of a liquid hydrocarbon loading vehicle comprises a liquid phase flare venting torch line 12 and a gas phase flare venting torch line 20; the outlet ends of the liquid phase flare venting torch line 12 and the gas phase flare venting torch line 20 are both connected to a flare venting line 22, and the inlet ends thereof are respectively provided with a liquid phase flare venting torch pipeline quick connector 11 and a gas phase flare venting torch pipeline quick connector 19; the liquid phase flare venting torch pipeline quick connector 11 and the gas phase flare venting torch pipeline quick connector 19 are respectively connected to a liquid phase venting hose 10 with a quick connector and a gas phase venting hose 18 with a quick connector; the other ends of the liquid phase venting hose 10 with a quick connector and the gas phase venting hose 18 with a quick connector are respectively connected to the crane pipe liquid phase venting quick connector 9 and the crane pipe gas phase venting quick connector 17 of the crane pipe.

[0019] It can be seen that the liquid phase flare line 12 and the gas phase flare line 20 are connected to the venting joint of the crane pipe through a hose, so that when the output end of the crane pipe moves, the liquid phase and gas phase venting pipelines are always connected to the crane pipe, ensuring airtightness, avoiding frequent disassembly and assembly of the joints, reducing the possibility of leakage, and improving safety. The liquid phase flare line 12 and the gas phase flare line 20 are only used after loading is completed to ensure loading safety.

[0020] Among them, the crane pipe liquid phase venting quick connector 9 and the crane pipe gas phase venting quick connector 17 are respectively connected to the ends of the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline; the other ends of the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline are respectively connected to the delivery pipe between the crane pipe liquid phase valve 6 and the crane pipe liquid phase quick connector 7 and the output pipe between the crane pipe gas phase valve 14 and the crane pipe gas phase quick connector 15, which are respectively used to obtain liquid phase residue and gas phase residue from the ends of the liquid phase and gas phase output of the crane pipe.

[0021] It can be seen that the liquid phase flare line 12 and the gas phase flare line 20 obtain the liquid phase residue and the gas phase residue from the ends of the liquid phase and gas phase output of the crane pipe through the hose, and can completely vent the residue in the crane pipe, with a good venting effect.

[0022] Although the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline are respectively provided with a crane pipe liquid phase venting valve 8 and a crane pipe gas phase venting valve 16, in order to further improve safety and facilitate use, a liquid phase flare torch valve 13 and a gas phase flare torch valve 21 are respectively provided on the liquid phase flare torch line 12 and the gas phase flare torch line 20. Only when the crane pipe liquid phase venting valve 8 and the crane pipe gas phase venting valve 16, as well as the liquid phase flare torch valve 13 and the gas phase flare torch valve 21 are all opened, can venting be performed.

[0023] The crane pipe liquid phase quick connector 7 and the crane pipe gas phase quick connector 15 are respectively used to connect the tanker liquid phase quick connector 23 and the tanker gas phase quick connector 25 of the liquid hydrocarbon tanker 27. So that the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline obtain liquid phase residue and gas phase residue from the end of the liquid phase and gas phase output of the crane pipe; the preferred tanker liquid phase quick connector 23 and the tanker gas phase quick connector 25 are respectively provided with a tanker liquid phase valve 24 and a tanker gas phase valve 26 on the pipeline of the tanker liquid hydrocarbon tanker 27; to ensure the loading and unloading safety of the tanker.

[0024] Exemplarily, the liquid phase pipeline input end and the gas phase pipeline input end of the crane pipe are respectively provided with a crane pipe liquid phase port root valve 2 and a crane pipe gas phase port root valve 4, so as to control the delivery of materials to the crane pipe.

[0025] When the present embodiment is used, the preferred use mode is to close the crane pipe liquid phase port root valve 2, crane pipe liquid phase valve 6 and tanker liquid phase valve 24 after loading, close the crane pipe gas phase port root valve 4, crane pipe gas phase valve 14 and tanker gas phase valve 26. At this time, open the crane pipe liquid phase vent valve 8 and liquid phase flare valve 13, open the crane pipe gas phase vent valve 16 and gas phase flare valve 21. The residual liquid of liquid hydrocarbon between the crane pipe liquid phase valve 6 and the tank truck liquid phase valve 24 enters the flare venting line through the liquid phase flare venting pipeline, and the liquid hydrocarbon gas between the crane pipe gas phase valve 14 and the tank truck gas phase valve 26 enters the flare venting line 22 through the gas phase flare venting pipeline, thereby discharging the residual liquid between the crane pipe liquid phase valve 6 and the tank truck liquid phase valve 24 and the residual gas between the crane pipe gas phase valve 14 and the tank truck gas phase valve 26 to the flare venting pipe, avoiding the risk of liquid hydrocarbon residual entering the atmosphere after the crane pipe liquid phase quick connector 7 and the tank truck liquid phase quick connector 23 are disconnected, and the crane pipe gas phase quick connector 15 and the tank truck gas phase quick connector 25 are disconnected, and the risk of liquid hydrocarbon volatilization causing explosion.

[0026] Among them, it is further explained that since the crane tanker connection is a crane universal connection, in order to ensure the rotation of the crane during loading and contraction, a hose is connected behind the crane liquid phase vent valve 8 and the gas phase vent valve, and metal pipes cannot be used for connection. Quick connectors are used on both sides of the hose to facilitate connection with the flare line and the vent valve pipeline. The pressure of the hose must meet the pressure when the liquid hydrocarbon is loaded to prevent excessive pressure when the residual liquid is vented, causing the hose to leak. The liquid phase flare valve and the gas phase flare valve should be shut-off valves as much as possible. Since the residual liquid pressure in the crane is high and the flare vent line 22 pressure is low, the liquid phase flare valve and the gas phase flare valve should be opened slowly, and the valve should be fully opened as the residual liquid pressure in the crane drops.

[0027] The advantages of this embodiment are:

[0028] (1) Liquid phase residue and gas phase residue are obtained from the ends of the liquid phase and gas phase output of the crane pipe, and the residue in the crane pipe can be completely emptied, with good venting effect and less residue released into the air.

[0029] (2) The liquid phase flare line 12 and the gas phase flare line 20 are both connected to the crane pipe through a hose, so that when the output end of the crane pipe moves, the liquid phase and gas phase venting pipelines are always connected to the crane pipe, ensuring airtightness, avoiding frequent disassembly and assembly of joints, reducing the possibility of leakage, and improving safety.

[0030] In short, this system avoids the risk of explosion caused by the volatilization of liquid hydrocarbons after loading, vents the residues in the crane pipe after loading as much as possible, reduces leakage and improves safety.

[0031] The parts not described in detail in this utility model are prior art; for ordinary technicians in this field, the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The scope of this utility model is defined by the attached claims and their equivalents.

Claims

1. A system for venting residual liquid from a crane pipe for loading a liquid hydrocarbon, comprising a liquid phase flaring line (12) and a gas phase flaring line (20); characterized in that: The outlet ends of the liquid phase flare torch line (12) and the gas phase flare torch line (20) are connected to the flare vent line (22), and the inlet ends thereof are respectively provided with a liquid phase flare torch pipeline quick connector (11) and a gas phase flare torch pipeline quick connector (19); the liquid phase flare torch pipeline quick connector (11) and the gas phase flare torch pipeline quick connector (19) are respectively connected to a liquid phase vent hose with a quick connector (10) and a gas phase vent hose with a quick connector (18); the other ends of the liquid phase vent hose with a quick connector (10) and the gas phase vent hose with a quick connector (18) are respectively connected to the crane pipe liquid phase vent quick connector (9) and the crane pipe gas phase vent quick connector (17).

2. A system for venting residual liquid from a crane pipe for loading liquid hydrocarbons according to claim 1, characterized in that: The crane pipe liquid phase venting quick connector (9) and the crane pipe gas phase venting quick connector (17) are respectively connected to the ends of the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline; the other ends of the crane pipe liquid phase venting pipeline and the crane pipe gas phase venting pipeline are respectively connected to the delivery pipe between the crane pipe liquid phase valve (6) and the crane pipe liquid phase quick connector (7) and the output pipe between the crane pipe gas phase valve (14) and the crane pipe gas phase quick connector (15), and are respectively used to obtain liquid phase residue and gas phase residue from the ends of the liquid phase and gas phase output of the crane pipe.

3. A system for venting residual liquid from a crane pipe for loading liquid hydrocarbons according to claim 2, characterized in that: A liquid phase flare valve (13) and a gas phase flare valve (21) are respectively provided on the liquid phase flare line (12) and the gas phase flare line (20).

4. A system for venting residual liquid from a crane pipe for loading liquid hydrocarbons according to claim 3, characterized in that: The crane pipe liquid phase quick connector (7) and the crane pipe gas phase quick connector (15) are respectively used to connect the tanker liquid phase quick connector (23) and the tanker gas phase quick connector (25) of the liquid hydrocarbon tanker (27).

5. A system for venting residual liquid from a crane pipe for loading liquid hydrocarbons according to claim 4, characterized in that: The liquid phase pipeline input end and the gas phase pipeline input end of the crane pipe are respectively provided with a crane pipe liquid phase port root valve (2) and a crane pipe gas phase port root valve (4).

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