Airtight sampling and recovery system for a tank truck of easily vaporized liquid

Abstract

The utility model relates to liquid tank car sampling technical field discloses an easy vaporization liquid tank car closed sampling recovery system, including tank car, the tank car unloading mouth butt joint double -sealed quick -coupling, double -sealed quick -coupling passes through second pipeline connection automation control valve, automation control valve connects nitrogen gas pipeline, fourth pipeline and fifth pipeline respectively, fifth pipeline connects the spherical tank, first check valve, sampling steel bottle, second check valve, flow sensor, content detection sensor, compressor and gas holder are connected in proper order on the fourth pipeline. The utility model discloses through the closed type pipeline design, pressure self -balancing and medium recovery module, realizes safe, the sampling operation of environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of liquid tanker sampling technology, specifically to a closed sampling and recovery system for easily vaporized liquid tankers. Background Technology

[0002] Currently, during the production and transportation processes of petrochemical production facilities, tank trucks transporting liquids or volatile media (such as oil, liquefied gas, and chemicals) require quality testing through sampling ports. Traditional sampling methods have the following problems:

[0003] 1. Medium volatilization: Direct venting during sampling allows harmful gases (such as VOCs) to escape, polluting the environment and endangering the health of operators.

[0004] 2. Residual leakage: Residual liquid drips from the pipeline after sampling, resulting in material waste and contamination.

[0005] 3. Safety hazards: Flammable and explosive media may cause combustion and explosion risks when exposed to air.

[0006] In existing technologies, some solutions use simple sealing caps or drainage tubes, but these cannot completely solve the problems of safe media recovery and automated control. Therefore, there is an urgent need for a high-efficiency, fully enclosed sampling and recovery system. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a closed sampling and recovery system for easily vaporized liquid tank trucks.

[0008] To achieve the above objectives, the technical solution of this utility model is: a closed sampling and recovery system for easily vaporized liquid tank trucks, comprising a tank truck, wherein the unloading port of the tank truck is connected to a double-sealed quick connector, the double-sealed quick connector is connected to an automated control valve via a second pipeline, the automated control valve is connected to a nitrogen pipeline, a fourth pipeline and a fifth pipeline respectively, the fifth pipeline is connected to a spherical tank, and the fourth pipeline is sequentially connected to a first one-way valve, a sampling cylinder, a second one-way valve, a flow sensor, a content detection sensor, a compressor and a gas holder.

[0009] Furthermore, the sampling cylinder is connected to a first quick connector and a second quick connector on its front and rear pipelines, respectively.

[0010] Furthermore, it also includes a third pipeline, on which a second gate valve is provided. One end of the third pipeline is connected to the pipeline between the first check valve and the first quick connector, and the other end is connected to the pipeline between the second quick connector and the second check valve.

[0011] Furthermore, a first gate valve is provided between the content detection sensor and the compressor.

[0012] Furthermore, the gas holder is connected to the boiler combustion system.

[0013] Furthermore, the sampling cylinder is supported by a retractable support frame.

[0014] Furthermore, an automated gate valve is installed on the second pipeline.

[0015] The beneficial effects of this invention are as follows: This invention achieves safe and environmentally friendly sampling operations through a closed pipeline design, pressure self-balancing, and a media recovery module. It solves the problems of media volatilization, leakage, and safety hazards during sampling of easily vaporized liquids in existing technologies. Combined with nitrogen purging, compressor and gas holder delivery and storage, and one-way valve control, the residual media recovery rate is ≥99.9%. Automated operation is achieved through an intelligent control unit, reducing the risk of human error. Attached Figure Description

[0016] Figure 1 This is a system diagram of this utility model.

[0017] In the diagram: 1. Automotive gate valve; 2. Double-seal quick connector; 3. Automated gate valve; 4. Automated control valve; 5. First check valve; 6. First quick connector; 7. Sampling cylinder; 8. Second quick connector; 9. Second check valve; 10. Flow sensor; 11. Content detection sensor; 12. Compressor; 13. Gas holder; 14. Spherical tank; 15. First gate valve; 16. Second gate valve; 17. Telescopic support frame; P1. Nitrogen pipeline; P2. Second pipeline; P3. Third pipeline; P4. Fourth pipeline; P5. Fifth pipeline. Detailed Implementation

[0018] Example:

[0019] like Figure 1 As shown, a closed sampling and recovery system for easily vaporized liquids in a tank truck includes a tank truck. The unloading port of the tank truck is connected to a double-sealed quick connector 2. The double-sealed quick connector 2 is connected to an automated control valve 4 via a second pipeline P2. An automated gate valve 3 is installed on the second pipeline P2. The automated control valve 4 is connected to a nitrogen pipeline P1, a fourth pipeline P4, and a fifth pipeline P5. The fifth pipeline P5 is connected to a spherical tank 14. A first one-way valve 5, a sampling cylinder 7, a second one-way valve 9, a flow sensor 10, a content detection sensor 11, a compressor 12, and a gas holder 13 are sequentially connected to the fourth pipeline P4. The gas holder 13 is connected to a boiler combustion system. A first gate valve 15 is installed between the content detection sensor 11 and the compressor 12. The sampling cylinder 7 is supported by a retractable support frame 17.

[0020] The sampling cylinder 7 is connected to a first quick connector 6 and a second quick connector 8 on its front and rear pipelines, respectively. The sampling and recovery system also includes a third pipeline P3, on which a second gate valve 16 is provided. One end of the third pipeline P3 is connected to the pipeline between the first one-way valve 5 and the first quick connector 6, and the other end is connected to the pipeline between the second quick connector 8 and the second one-way valve 9.

[0021] Workflow:

[0022] (1) System docking: After the tanker arrives, dock the double-sealed quick connector 2, install the sampling cylinder 7 through the first quick connector 6 and the second quick connector 8, open the valves at both ends of the sampling cylinder 7, adjust the telescopic support frame 17 to eliminate the stress of the quick connector, open the vehicle gate valve 1, and personnel maintain a safe distance while waiting.

[0023] (2) Nitrogen purging: Start the automated operation. The automated control valve 4 connects the nitrogen pipeline P1 and the fourth pipeline P4. At this moment, the second gate valve 16 is closed and the first gate valve 15 is open. Nitrogen purges the sampling cylinder 7. When the content detection sensor 11 detects that the oxygen content is 0% and the nitrogen content is 100%, the automated control valve 4 rotates the valve position to connect the second pipeline P2 and the fourth pipeline P4.

[0024] (3) Sampling process: After the automatic control valve 4 connects the second pipeline P2 and the fourth pipeline P4, the automatic gate valve 3 automatically opens, and the automatic control valve 4 connects to the fourth pipeline P4 to start the sampling operation. The gas passes through the sampling cylinder 7 and subsequent pipelines, through the flow sensor 10, the content detection sensor 11, the first gate valve 15, and the compressor 12, and enters the gas holder 13 for storage and automatic recovery. It is then incinerated and utilized by the boiler incineration system. When the flow sensor 10 exceeds the preset threshold of 2L, the automatic gate valve 3 and the first gate valve 15 are automatically closed, and the operator intervenes to close the gate valves at both ends of the sampling cylinder 7. If the oxygen content is detected to be >0.5% or the flow is abnormal, the system automatically triggers the emergency shutdown procedure, immediately closes the automatic gate valve 3, stops sampling, and alarms.

[0025] (4) The system repeats nitrogen purging. After sampling is completed, the automatic gate valve 3 is closed, the valves at both ends of the sampling cylinder 7 are closed, the automatic control valve 4 connects the nitrogen pipeline P1 and the fourth pipeline P4, the second gate valve 16 is opened, and the nitrogen content is detected by the content detection sensor 11 to be 100%. Then the first gate valve 15 and the second gate valve 16 are closed.

[0026] (5) The operator intervenes to disconnect the first quick connector 6 and the second quick connector 8, and removes the sampling cylinder 7 for testing.

[0027] (6) After the sample is tested and found to be qualified, the automatic control valve 4 connects the second pipeline P2 and the fifth pipeline P5, and the automatic gate valve 3 is opened to carry out the unloading operation.

[0028] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

[0029] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A closed sampling and recovery system for easily vaporized liquids in tank trucks, comprising tank trucks, characterized in that: The tank truck unloading port is connected to a double-sealed quick connector (2). The double-sealed quick connector (2) is connected to an automated control valve (4) via a second pipeline (P2). The automated control valve (4) is connected to a nitrogen pipeline (P1), a fourth pipeline (P4), and a fifth pipeline (P5). The fifth pipeline (P5) is connected to a spherical tank (14). The fourth pipeline (P4) is connected in sequence to a first one-way valve (5), a sampling cylinder (7), a second one-way valve (9), a flow sensor (10), a content detection sensor (11), a compressor (12), and a gas holder (13).

2. The closed sampling and recovery system for easily vaporized liquids in tank trucks according to claim 1, characterized in that: The sampling cylinder (7) is connected to a first quick connector (6) and a second quick connector (8) on the front and rear pipelines, respectively.

3. The closed sampling and recovery system for easily vaporized liquids in tank trucks according to claim 2, characterized in that: It also includes a third pipeline (P3), on which a second gate valve (16) is provided. One end of the third pipeline (P3) is connected to the pipeline between the first check valve (5) and the first quick connector (6), and the other end is connected to the pipeline between the second quick connector (8) and the second check valve (9).

4. The closed sampling and recovery system for easily vaporized liquids in tank trucks according to claim 1, characterized in that: A first gate valve (15) is provided between the content detection sensor (11) and the compressor (12).

5. The closed sampling and recovery system for easily vaporized liquids in tank trucks according to claim 1, characterized in that: The gas holder (13) is connected to the boiler combustion system.

6. The closed sampling and recovery system for easily vaporized liquids in tank trucks according to claim 1, characterized in that: The sampling cylinder (7) is supported by a telescopic support frame (17).

7. The closed sampling and recovery system for easily vaporized liquids in tank trucks according to claim 1, characterized in that: An automated gate valve (3) is installed on the second pipeline (P2).

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