Refrigerant recovery pipeline device of outlet separator of mixed refrigerant compression device

Abstract

The utility model relates to a mixed refrigerant compression device outlet separator refrigerant recovery pipeline device which comprises a main tank body and a main pipeline connected to a main tank body outlet separator, the middle of the main pipeline is connected with a refrigerant recovery part, and the refrigerant recovery part comprises a pressure adjusting part and a refrigerant recovery tank connected with the pressure adjusting part. The pressure adjusting piece is used for being matched with the pressure difference on the main tank body outlet separator to recycle the liquid-phase refrigerant in the main tank body outlet separator through the refrigerant recycling tank. According to the technical scheme, the mixed refrigerant device has the beneficial effects that the pressure adjusting part is connected to the middle of the main pipeline, the refrigerant recycling tank is connected with the pressure adjusting part, and the liquid refrigerant is recycled to the refrigerant recycling tank through the pressure difference between the main tank body outlet separator and the pressure adjusting part, so that when the mixed refrigerant device is planned to stop, the refrigerant recycling efficiency is improved. The liquid refrigerant can be quickly and effectively recycled; moreover, the pressure can be adjusted through the pressure adjusting piece, and the recovery efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant recovery, specifically to a refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device. Background Technology

[0002] The mixed refrigerant compression unit is mainly used to provide cooling capacity for the liquid nitrogen washing unit. It pressurizes the mixed refrigerant (9℃, 0.358MPaA) from the liquid nitrogen washing unit to 4.0759MPaA and 127.12℃, further cools it to 40℃, and then sends it to the liquid nitrogen washing unit for heat exchange to 12℃ before returning to the mixed refrigerant compression unit. After being separated by a separator, it is sent to the liquid nitrogen washing unit for use by the liquid nitrogen washing unit.

[0003] The unit is designed to handle 91,940 Nm3 / h of mixed refrigerant, with an annual operating time of 8,000 hours and an operational flexibility of 50%–120%.

[0004] In existing mixed refrigerant compression units, the liquid level in the outlet separator cannot be discharged in time during planned shutdowns. As the unit is vented and turned on, the liquid vaporizes and enters the flare network, resulting in a large waste of refrigerant.

[0005] Therefore, it is very necessary to provide a refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device to solve the above-mentioned technical problems. Utility Model Content

[0006] Based on the above description, this utility model provides a refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compressor, in order to solve the problem that in the prior art, when the mixed refrigerant compressor is scheduled to shut down, the liquid level in the outlet separator cannot be discharged in time, and it will vaporize and enter the flare network when the unit is vented, resulting in a large waste of refrigerant.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device includes a main tank and a main pipeline connected to the outlet separator of the main tank. A refrigerant recovery component is connected in the middle of the main pipeline. The refrigerant recovery component includes a pressure regulating component and a refrigerant recovery tank connected to the pressure regulating component. The pressure regulating component is used to cooperate with the pressure difference on the outlet separator of the main tank to recover the liquid refrigerant in the outlet separator of the main tank through the refrigerant recovery tank.

[0008] Furthermore, the pressure regulating component includes a pressure regulating cylinder connected to the main pipeline, and the pressure regulating cylinder is provided with at least one.

[0009] Furthermore, when the pressure regulating cylinder is provided, cylinder switch valves are connected to both sides of the pressure regulating cylinder.

[0010] Furthermore, when there are two or more pressure regulating cylinders, the outermost two pressure regulating cylinders are connected to a cylinder switch valve, and a cylinder switch valve is connected between two adjacent pressure regulating cylinders.

[0011] Furthermore, each of the pressure regulating cylinders is slidably connected to a pressure piston, and a main piston rod is connected to the pressure piston, which is slidably connected to the pressure regulating cylinder.

[0012] Furthermore, an auxiliary piston rod is connected to the pressure piston, and the auxiliary piston rod is slidably connected to the pressure regulating cylinder. At least one auxiliary piston rod is provided, and the auxiliary piston rod is used to provide auxiliary support and guidance to the main piston rod.

[0013] Furthermore, a cylinder support is connected to the pressure regulating cylinder, and a driver is connected to the cylinder support. The telescopic end of the driver is connected to the main piston rod.

[0014] Furthermore, each of the pressure regulating cylinders is connected to an auxiliary recovery tank, which is connected to the refrigerant recovery tank.

[0015] Furthermore, a pressure gauge is connected to the auxiliary recovery tank to display the pressure inside the auxiliary recovery tank, so that when the pressure inside the auxiliary recovery tank reaches a certain value, the operator can conveniently transfer the liquid refrigerant in the auxiliary recovery tank to the refrigerant recovery tank.

[0016] Furthermore, a first pipe is connected to one side of the auxiliary recovery tank, and the first pipe is connected to the pressure regulating cylinder. A one-way valve and a first auxiliary switching valve are connected to the first pipe. The one-way valve is used to prevent the liquid refrigerant in the auxiliary recovery tank from returning to the pressure regulating cylinder. A second pipe is connected to the other side of the auxiliary recovery tank, and the second pipe is connected to the refrigerant recovery tank. A second auxiliary switching valve is connected to the second pipe.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] The pressure regulator is connected to the middle of the main pipeline, and the refrigerant recovery tank is connected to the pressure regulator. By utilizing the pressure difference created by the separator at the main tank outlet and the pressure regulator, liquid refrigerant is recovered to the refrigerant recovery tank. This allows the mixed refrigerant unit to quickly and effectively recover liquid refrigerant during planned shutdowns. Furthermore, the pressure regulator can adjust the pressure, improving recovery efficiency. This solves the problem in existing mixed refrigerant compression units where the liquid level in the outlet separator cannot be discharged in time during planned shutdowns, causing it to vaporize and enter the flare network when the unit is vented, resulting in significant refrigerant waste. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a refrigerant recovery pipeline device for an outlet separator of a mixed refrigerant compression device provided in this embodiment of the present invention;

[0020] Figure 2 for Figure 1 Enlarged structural diagram at point Q;

[0021] Figure 3 A partial cross-sectional structural schematic diagram of a pressure regulating component in a refrigerant recovery pipeline device of a mixed refrigerant compression device outlet separator provided for an embodiment of this utility model;

[0022] Figure 4 for Figure 3 A magnified structural diagram of point W in the middle.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Main tank body;

[0025] 2. Main pipeline;

[0026] 3. Refrigerant recovery unit;

[0027] 31. Pressure regulating component; 311. Pressure regulating cylinder; 312. Cylinder switch valve; 313. Pressure piston; 314. Main piston rod; 315. Auxiliary piston rod; 316. Cylinder support; 317. Actuator;

[0028] 32. Refrigerant recovery tank; 33. Auxiliary recovery tank; 34. Pressure gauge; 35. First pipeline; 36. Check valve; 37. First auxiliary switching valve; 38. Second pipeline; 39. Second auxiliary switching valve. Detailed Implementation

[0029] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0032] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0033] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0034] Example 1:

[0035] like Figures 1 to 4 As shown, a refrigerant recovery pipeline device for a mixed refrigerant compression unit's outlet separator is disclosed. One end of the main pipeline 2 is connected to the outlet separator of the main tank 1, and the other end is used to connect to the mixed refrigerant system. A refrigerant recovery unit 3 is connected to the middle of the main pipeline 2. The refrigerant recovery unit 3 consists of a pressure regulating element 31 and a refrigerant recovery tank 32, which recovers liquid refrigerant from the outlet separator of the main tank 1 to the refrigerant recovery tank 32 through a pressure difference.

[0036] In addition, at least one pressure regulating cylinder 311 is provided and connected in series on the main pipeline 2, and the pressure difference is further adjusted by the movement of the internal piston. When there is one cylinder, one cylinder switch valve 312 is connected to each side; when there are two or more cylinders, one cylinder switch valve 312 is connected to each outermost cylinder, and adjacent cylinders share one cylinder switch valve 312.

[0037] Each pressure regulating cylinder 311 has a pressure piston 313 slidably connected inside, and is connected to the driver 317 via a main piston rod 314. At the same time, at least one auxiliary piston rod 315 is connected to the pressure piston 313, slidably connected to the pressure regulating cylinder 311, and assists in supporting the main piston rod 314 and limiting and guiding its position.

[0038] The cylinder support 316 is fixed to the outside of the pressure regulating cylinder 311 to support the actuator 317. The actuator 317 is connected to the cylinder support 316, and its telescopic end is connected to the main piston rod 314 to drive the piston to move and regulate the pressure.

[0039] Preferably, by setting multiple pressure regulating cylinders 311, each pressure regulating cylinder 311 is equipped with a pressure piston 313, so that the pressure in the multiple pressure regulating cylinders 311 can be precisely controlled, thereby further improving the recovery efficiency of liquid refrigerant.

[0040] Each pressure regulating cylinder 311 is connected to an auxiliary recovery tank 33 via a first pipe 35 for temporary storage of recovered liquid refrigerant. Meanwhile, a pressure gauge 34 is installed on top of the auxiliary recovery tank 33 to display the tank pressure in real time. When the pressure reaches a set value, such as 0.8 MPa, the gauge controls the recovery of the liquid refrigerant in the auxiliary recovery tank 33 to the refrigerant recovery tank 32.

[0041] Preferably, by setting up an auxiliary recovery tank 33 and a pressure gauge 34, the recovery process of the liquid refrigerant becomes more intuitive and facilitates the operation of the operator.

[0042] The first conduit 35 connects the pressure regulating cylinder 311 and the auxiliary recovery tank 33. A one-way valve 36 ensures that the liquid refrigerant can only flow from the pressure regulating cylinder 311 to the auxiliary recovery tank 33. A first auxiliary switching valve 37 ensures that gas will not enter the auxiliary recovery tank 33 during normal operation. The second conduit 38 connects the auxiliary recovery tank 33 and the refrigerant recovery tank 32, and the liquid refrigerant is delivered to the refrigerant recovery tank 32 by opening the second auxiliary switching valve 39.

[0043] The specific implementation method of this application is as follows:

[0044] First, confirm that the main tank 1, main pipeline 2, pressure regulating component 31 and all valves are securely connected and leak-free; check that the cylinder switch valve 312 is open, the first auxiliary switch valve 37 and the second auxiliary switch valve 39 are closed, adjust the pressure piston 313 to the initial position of the pressure regulating cylinder 311, and at the same time, use the pressure gauge 34 to ensure that the pressure in the auxiliary recovery tank 33 is within a certain range.

[0045] Secondly, before stopping, close the last cylinder switch valve 312 on the main pipeline 2 and open the first auxiliary switch valve 37 and the second auxiliary switch valve 39. The liquid refrigerant is recovered to the refrigerant recovery tank 32 by utilizing the pressure difference created by the separator at the outlet of the main tank 1 and the pressure regulating element 31. At this time, the high-pressure gaseous refrigerant in the main pipeline 2 enters the pressure regulating cylinder 311. Based on the actual situation, the actuator 317 is controlled to push the pressure piston 313 to move, thereby increasing the pressure in the pressure regulating cylinder 311 and recovering the liquid refrigerant to the refrigerant recovery tank 32.

[0046] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0047] The pressure regulator is connected to the middle of the main pipeline, and the refrigerant recovery tank is connected to the pressure regulator. By utilizing the pressure difference created by the separator at the main tank outlet and the pressure regulator, liquid refrigerant is recovered to the refrigerant recovery tank. This allows the mixed refrigerant unit to quickly and effectively recover liquid refrigerant during planned shutdowns. Furthermore, the pressure regulator can adjust the pressure, improving recovery efficiency. This solves the problem in existing mixed refrigerant compression units where the liquid level in the outlet separator cannot be discharged in time during planned shutdowns, causing it to vaporize and enter the flare network when the unit is vented, resulting in significant refrigerant waste.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression unit, characterized in that, The system includes a main tank (1) and a main pipe (2) connected to the outlet separator of the main tank (1). A refrigerant recovery unit (3) is connected in the middle of the main pipe (2). The refrigerant recovery unit (3) includes a pressure regulating unit (31) and a refrigerant recovery tank (32) connected to the pressure regulating unit (31). The pressure regulating unit (31) is used to cooperate with the pressure difference on the outlet separator of the main tank (1) to recover the liquid refrigerant in the outlet separator of the main tank (1) through the refrigerant recovery tank (32).

2. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 1, characterized in that, The pressure regulating component (31) includes a pressure regulating cylinder (311) connected to the main pipe (2), and the pressure regulating cylinder (311) is provided with at least one.

3. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 2, characterized in that, When the pressure regulating cylinder (311) is provided, cylinder switch valves (312) are connected to both sides of the pressure regulating cylinder (311).

4. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 2, characterized in that, When there are two or more pressure regulating cylinders (311), the outermost two pressure regulating cylinders (311) are connected to a cylinder switch valve (312), and a cylinder switch valve (312) is connected between two adjacent pressure regulating cylinders (311).

5. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 2, characterized in that, Each pressure regulating cylinder (311) is slidably connected to a pressure piston (313), and a main piston rod (314) is connected to the pressure piston (313). The main piston rod (314) is slidably connected to the pressure regulating cylinder (311).

6. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 5, characterized in that, An auxiliary piston rod (315) is connected to the pressure piston (313). The auxiliary piston rod (315) is slidably connected to the pressure regulating cylinder (311). At least one auxiliary piston rod (315) is provided. The auxiliary piston rod (315) is used to provide auxiliary support and guidance to the main piston rod (314).

7. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 6, characterized in that, The pressure regulating cylinder (311) is connected to a cylinder support (316), and the cylinder support (316) is connected to a driver (317). The telescopic end of the driver (317) is connected to the main piston rod (314).

8. The refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 7, characterized in that, Each of the pressure regulating cylinders (311) is connected to an auxiliary recovery tank (33), which is connected to the refrigerant recovery tank (32).

9. A refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 8, characterized in that, A pressure gauge (34) is connected to the auxiliary recovery tank (33). The pressure gauge (34) is used to display the pressure inside the auxiliary recovery tank (33) so that when the pressure inside the auxiliary recovery tank (33) reaches a certain value, the operator can conveniently transfer the liquid refrigerant in the auxiliary recovery tank (33) to the refrigerant recovery tank (32).

10. A refrigerant recovery pipeline device for the outlet separator of a mixed refrigerant compression device according to claim 9, characterized in that, The auxiliary recovery tank (33) is connected to a first pipe (35) on one side, which is connected to the pressure regulating cylinder (311). A one-way valve (36) and a first auxiliary switching valve (37) are connected to the first pipe (35). The one-way valve (36) is used to prevent the liquid refrigerant in the auxiliary recovery tank (33) from returning to the pressure regulating cylinder (311). The auxiliary recovery tank (33) is connected to a second pipe (38) on the other side, which is connected to the refrigerant recovery tank (32). A second auxiliary switching valve (39) is connected to the second pipe (38).

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