Liquid-phase material recovery device for inlet pipe of compressor

Abstract

The utility model belongs to the technical field of recovery devices, and particularly relates to a compressor inlet pipe liquid phase material recovery device which comprises a compressor and a material storage tank, the compressor is provided with an inlet pipe and an outlet pipe, the material storage tank is provided with a feeding pipe and a discharging pipe, the discharging pipe is connected with the inlet pipe, the feeding pipe is provided with a feeding valve, and the outlet pipe is provided with an outlet valve. The system is characterized in that a liquid separation tank is arranged on one side of the compressor, an air inlet pipe is arranged on the liquid separation tank and connected with a discharging pipe, an air inlet valve is arranged on the air inlet pipe, an air outlet pipe is arranged on the liquid separation tank and connected with an inlet pipe, an air outlet valve is arranged on the air outlet pipe, a liquid outlet pipe is arranged at the bottom of the liquid separation tank, a liquid outlet valve is arranged on the liquid outlet pipe, and the liquid outlet pipe is connected with an unloading liquid phase main pipeline. A nitrogen input pipe is arranged at the top of the liquid separation tank, and a nitrogen valve is arranged on the nitrogen input pipe. Compared with the prior art, the recovery device effectively solves the problem that liquid-phase materials enter the air cylinder in the unloading process of the compressor, and the running safety and stability of the compressor are remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of recovery devices, and particularly relates to a liquid-phase material recovery device for an inlet pipe of a compressor. Background Art

[0002] As an important raw material in the chemical industry, the safe and efficient transportation and storage of liquid hydrocarbons are crucial for the normal operation of chemical enterprises. The transportation of liquid hydrocarbon tank trucks is one of the main ways of transporting liquid hydrocarbon materials, and its unloading operation is an indispensable part of the management of liquid hydrocarbon materials. During the unloading process, using a compressor to pressurize the tank truck for unloading is a common operation method, which can effectively improve the unloading efficiency and ensure that the liquid hydrocarbon materials can be smoothly and quickly transferred to the storage facilities.

[0003] However, in the compressor unloading operation, ensuring that no liquid-phase material enters the compressor cylinder is the key to ensuring its safe operation. Once the liquid-phase material enters the compressor cylinder, it will cause serious damage to key components such as the crankshaft and connecting rod, and may even lead to serious production safety accidents. Especially in low-temperature weather conditions such as winter, this problem is more prominent. Due to the small production scale or discontinuous unloading operation, the compressor may be in a shutdown state for a long time, and the gas-phase material in the inlet pipeline is prone to liquefaction under the long-term static and low-temperature environment, forming liquid-phase material. If these liquefied liquid-phase materials are not properly handled during the startup and operation of the compressor, they will pose a serious threat to the safe operation of the compressor.

[0004] At present, the liquid hydrocarbon compressors on the market generally lack an effective treatment mechanism for liquid-phase materials in their design. The liquid-phase storage tank carried by their gas-phase inlets has a small volume, and even some compressors do not have a liquid-phase material collection and storage function at all. This design deficiency results in the compressor being unable to effectively handle the generation and accumulation of liquid-phase materials during the liquid hydrocarbon unloading operation, thus unable to meet the usage requirements in the actual production process. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the utility model provides a liquid-phase material recovery device for an inlet pipe of a compressor to solve the above problems.

[0006] A liquid-phase material recovery device for the inlet pipe of a compressor of the present utility model includes a compressor and a material storage tank. The compressor is provided with an inlet pipe and an outlet pipe, and the material storage tank is provided with a feed pipe and a discharge pipe. The discharge pipe is connected to the inlet pipe. The feed pipe is provided with a feed valve, and the outlet pipe is provided with an outlet valve. A liquid separation tank is arranged on one side of the compressor. The liquid separation tank is provided with an inlet gas pipe connected to the discharge pipe, and an inlet gas valve is arranged on the inlet gas pipe. The liquid separation tank is provided with an outlet gas pipe connected to the inlet pipe, and an outlet gas valve is arranged on the outlet gas pipe. A liquid discharge pipe is arranged at the bottom of the liquid separation tank, and a liquid discharge valve is arranged on the liquid discharge pipe. The liquid discharge pipe is connected to the total liquid pipeline for unloading the vehicle. A nitrogen input pipe is arranged at the top of the liquid separation tank, and a nitrogen valve is arranged on the nitrogen input pipe.

[0007] Further, a pump pipe is connected in parallel to the liquid discharge pipe. A liquid-phase pump is arranged on the pump pipe, and pump discharge valves are arranged at both ends of the pump pipe. A gas discharge valve is arranged on the liquid discharge pipe between the two ends of the pump pipe.

[0008] Further, a boundary valve is arranged on the discharge pipe, and an inlet main valve is arranged on the inlet pipe.

[0009] Further, the inlet gas pipe, the outlet gas pipe, the nitrogen input pipe, and the pump pipe are all 304 stainless steel pipes.

[0010] Further, the installation distance between the liquid separation tank and the compressor does not exceed 2 m.

[0011] Further, a liquid level gauge and a pressure gauge are arranged on the liquid separation tank.

[0012] Further, a nitrogen seal is arranged on the liquid separation tank. The liquid level gauge is a remote liquid level gauge, and the pressure gauge is a remote pressure gauge.

[0013] Compared with the prior art, the recovery device effectively solves the problem that liquid-phase materials enter the cylinder during the vehicle unloading process of the compressor, and significantly improves the safety and stability of the compressor operation. Through the design of the liquid separation tank, liquid-phase materials can be collected and stored, avoiding the risk of damage to the compressor. At the same time, it meets the vehicle unloading operation requirements of chemical enterprises of different scales, providing a strong guarantee for the safe and efficient transportation and storage of liquid hydrocarbons. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] In the figure: 1. Compressor; 2. Material storage tank; 3. Inlet pipe; 4. Outlet pipe; 5. Feed pipe; 6. Discharge pipe; 7. Feed valve; 8. Outlet valve; 9. Liquid separation tank; 10. Inlet gas pipe; 11. Inlet gas valve; 12. Outlet gas pipe; 13. Outlet gas valve; 14. Liquid discharge pipe; 15. Liquid discharge valve; 16. Total liquid pipeline for unloading truck; 17. Nitrogen input pipe; 18. Nitrogen valve; 19. Pump pipe; 20. Liquid pump; 21. Pump discharge valve; 22. Gas discharge valve; 23. Boundary valve; 24. Inlet main valve; 25. Liquid level gauge; 26. Material tank truck. Specific embodiments

[0016] For a better understanding of the present utility model, the following will Figure 1 be used to explain in detail the embodiments of the present utility model.

[0017] It should be noted that the directions of "front, rear, left, right, up, and down" described in the text are all based on Figure 1 the "front, rear, left, right, up, and down" directions in

[0018] Referring to Figure 1 , a liquid-phase material recovery device for the inlet pipe 3 of a compressor 1 of the present utility model mainly consists of a compressor 1, a material storage tank 2, and a liquid separation tank 9. The compressor 1 is provided with an inlet pipe 3 and an outlet pipe 4 for receiving and outputting materials; the material storage tank 2 is provided with a feed pipe 5 and a discharge pipe 6, where the feed pipe 5 controls the entry of materials into the material storage tank 2, and the discharge pipe 6 conveys the materials to the compressor 1. The main feature of this device is that a liquid separation tank 9 is arranged on one side of the compressor 1 for recovering the liquid-phase materials before they enter the compressor 1. The liquid separation tank 9 is connected to the discharge pipe 6 of the material storage tank 2 through an inlet gas pipe 10, and an inlet gas valve 11 is installed on the inlet gas pipe 10 to control the material flow rate entering the liquid separation tank 9. The top of the liquid separation tank 9 is provided with an outlet gas pipe 12, which is connected to the inlet pipe 3 of the compressor 1 through an outlet gas valve 13 to ensure that the gas-phase materials can smoothly enter the compressor 1. The bottom of the liquid separation tank 9 is provided with a liquid discharge pipe 14, and a liquid discharge valve 15 is installed on the liquid discharge pipe 14 to control the discharge of the liquid-phase materials. The liquid discharge pipe 14 is connected to the total liquid pipeline 16 for unloading the truck to convey the liquid-phase materials to the designated storage or treatment equipment.

[0019] To ensure the stable discharge of the liquid-phase materials, a pump pipe 19 is connected in parallel to the liquid discharge pipe 14. A liquid pump 20 is arranged on the pump pipe 19, and pump discharge valves 21 are arranged at both ends of the pump pipe 19. A gas discharge valve 22 is arranged on the liquid discharge pipe 14 between the two ends of the pump pipe 19. Through the above structure, this recovery device can provide two discharge methods to ensure the stable discharge of the liquid-phase materials and at the same time ensure the safe operation of the compressor 1.

[0020] The first discharging method is to inject nitrogen into the liquid separation tank 9 through a nitrogen pipe, and use the pressurization of nitrogen to discharge the liquid-phase material from the liquid outlet pipe 14. In this mode, the gas discharge valve 22 is opened, and at the same time the two pump discharge valves 21 are closed, and the liquid-phase pump 20 does not operate. This method is applicable to the situation where the liquid-phase material is less or rapid discharge is required.

[0021] The second discharging method is to discharge liquid from the pump pipe 19 by operating the liquid-phase pump 20. In this mode, the gas discharge valve 22 is closed, the two pump discharge valves 21 are opened, and the liquid-phase pump 20 starts to operate. Through the action of the liquid-phase pump 20, the liquid-phase material can be discharged more quickly. This method is applicable to the situation where the liquid-phase material is more or continuous discharge is required.

[0022] The design of the two discharging methods ensures the stable discharge of the liquid-phase material. And when a problem occurs in one discharging method, it can be quickly switched to the other discharging method, thus avoiding potential damage to the compressor 1 caused by unstable discharge.

[0023] An inlet valve 7 is provided on the inlet pipe 5 of the material storage tank 2 to control the material flow rate output from the material tank truck 26 to the storage tank. An outlet valve 8 is provided on the outlet pipe 4 of the compressor 1 to control the material flow rate output to the material tank truck 26. In addition, considering that there may be multiple pipelines for the material storage tank 2 and its outlet pipe 6 in the plant area, and the liquid separation tank 9 can recover the liquid-phase materials from more than one pipeline; a boundary valve 23 is provided on the outlet pipe 6 to control the flow rate of the material from the material storage tank 2 into the liquid separation tank 9, and the flow rate control of a single pipeline is achieved through the boundary valve 23; an inlet main valve 24 is provided on the inlet pipe 3 to control the total material flow rate entering the compressor 1.

[0024] In order to ensure the corrosion resistance and low-temperature performance of the pipeline, the inlet pipe 10, the outlet pipe 12, the nitrogen input pipe 17 and the pump pipe 19 are all made of 304 stainless steel pipes.

[0025] In order to ensure the safe distance between the compressor 1 and the liquid separation tank 9, the set distance between the two does not exceed 2m. This can reduce the pipeline length, shorten the residence time of the material in the pipeline, and thus reduce the possibility of the formation of liquid-phase materials.

[0026] Considering the problem that some unloading materials (such as butadiene) have the property of self-polymerization, a liquid level gauge 25 and a pressure gauge are installed on the liquid separation tank 9 to monitor the liquid level and pressure in the liquid separation tank 9 in real time. Both the liquid level gauge 25 and the pressure gauge adopt a remote transmission design so as to transmit the monitoring data to the central control system to realize remote monitoring and automatic control. At the same time, in order to further improve safety, a nitrogen seal is also provided on the liquid separation tank 9 to prevent air from entering the inside of the liquid separation tank 9.

[0027] The usage method and principle of the present utility model:

[0028] When using this device, first, the liquid hydrocarbon material is transported into the storage tank through the feed pipe 5 of the material storage tank 2. Then, the boundary valve 23 and the inlet main valve 24 on the discharge pipe 6 are opened to allow the material to enter the liquid separation tank 9 from the storage tank. After the material enters the liquid separation tank 9, the gaseous material enters the inlet pipe 3 of the compressor 1 through the gas outlet pipe 12 and is discharged from the outlet pipe 4 after being compressed by the compressor 1. The liquid material accumulates in the liquid separation tank 9. When the liquid level in the liquid separation tank 9 reaches the set value, after opening the liquid discharge valve 15, any discharge method can be selected to discharge the liquid material from the liquid discharge pipe 14 into the liquid unloading main pipeline 16.

[0029] It should be noted that Figure 1 The dotted pipeline in [description] is the pipeline part where the discharge pipe 6 is directly connected to the inlet pipe 3 in the prior art. When installing this recovery device, the existing pipeline (dotted part) should be removed first and then installed.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A compressor inlet pipe liquid phase material recovery device, comprising a compressor (1) and a material storage tank (2), wherein the compressor (1) is provided with an inlet pipe (3) and an outlet pipe (4), the material storage tank (2) is provided with a feed pipe (5) and a discharge pipe (6), the discharge pipe (6) is connected to the inlet pipe (3), the feed pipe (5) is provided with a feed valve (7), and the outlet pipe (4) is provided with an outlet valve (8), characterized in that: A liquid separator (9) is provided on one side of the compressor (1). The liquid separator (9) is provided with an air inlet pipe (10) connected to a discharge pipe (6). An air inlet valve (11) is provided on the air inlet pipe (10). The liquid separator (9) is provided with an air outlet pipe (12) connected to an inlet pipe (3). An air outlet valve (13) is provided on the air outlet pipe (12). A liquid outlet pipe (14) is provided at the bottom of the liquid separator (9). A liquid outlet valve (15) is provided on the liquid outlet pipe (14). The liquid outlet pipe (14) is connected to a liquid phase main pipeline (16) for unloading a vehicle. A nitrogen input pipe (17) is provided on the top of the liquid separator (9). A nitrogen valve (18) is provided on the nitrogen input pipe (17).

2. A compressor inlet pipe liquid phase material recovery device as claimed in claim 1, characterized in that: A pump pipe (19) is connected in parallel to the liquid outlet pipe (14), a liquid phase pump (20) is arranged on the pump pipe (19), pump discharge valves (21) are arranged at both ends of the pump pipe (19), and an air discharge valve (22) is arranged between the two ends of the liquid outlet pipe (14).

3. A compressor inlet pipe liquid phase material recovery device as claimed in claim 2, characterized in that: The discharge pipe (6) is provided with a boundary valve (23), and the inlet pipe (3) is provided with an inlet main valve (24).

4. A compressor inlet pipe liquid phase material recovery device as claimed in claim 3, characterized in that: The air inlet pipe (10), the air outlet pipe (12), the nitrogen input pipe (17) and the pump pipe (19) are all 304 stainless steel pipes.

5. A compressor inlet pipe liquid phase material recovery device as claimed in claim 1, characterized in that: The arrangement distance between the liquid separation tank (9) and the compressor (1) does not exceed 2 m.

6. A compressor inlet pipe liquid phase material recovery device as claimed in claim 1, characterized in that: The liquid separation tank (9) is provided with a liquid level meter (25) and a pressure gauge.

7. A compressor inlet pipe liquid phase material recovery device as claimed in claim 6, characterized in that: The liquid separation tank (9) is provided with a nitrogen seal, the liquid level gauge (25) is a remote liquid level gauge, and the pressure gauge is a remote pressure gauge.

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