Automatic oil return system of chlorine liquefier

Abstract

The utility model relates to and provides an automatic oil return system of a chlorine liquefier, which is characterized in that the chlorine liquefier is higher than an oil return device, the oil return device is higher than a refrigerator, and oil and refrigerant of the chlorine liquefier flow to the oil return device for gas-liquid separation by utilizing the liquid level difference between the chlorine liquefier and the oil return device. And the oil naturally flows to the refrigerating machine by using the natural gradient of the pipeline and the pressure difference between the oil return device and the air suction port of the refrigerating machine, so that the automatic oil return is realized. No power supply is needed in the whole process, energy consumption is saved, and oil return of the refrigerating unit is reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic oil return, in particular to an automatic oil return system for a chlorine gas liquefier. Background Art

[0002] The refrigerant of the chlorine liquefier uses the exhaust pressure of the refrigeration unit to press the liquid refrigerant in the refrigerant storage tank into the chlorine liquefier. The liquid refrigerant changes from liquid to gas after heat exchange with chlorine. The gaseous refrigerant is sucked into the refrigeration unit by the suction valve of the refrigeration unit and then compressed to exchange heat with water. The gaseous refrigerant is liquefied into liquid refrigerant, and the cycle repeats over and over again. However, a small amount of refrigeration oil will enter the chlorine liquefier during the compression process. Due to the light density of the oil, the refrigeration oil floats above the refrigerant in the chlorine liquefier. The accumulation of refrigeration oil will lead to a decrease in the heat exchange effect. Therefore, the refrigeration oil must be returned to the refrigeration unit regularly. The current automatic oil return device is controlled by PLC, but manual judgment is required to start the oil return device when returning the oil. The automatic oil return device is often interrupted due to program problems during actual use. At the same time, the automatic valves of the oil return device are controlled by solenoid valves. After running for a period of time, the oil return device will fail due to corrosion and other reasons, resulting in unreliable operation. Utility Model Content

[0003] The purpose of the utility model is to provide an automatic oil return system for a chlorine liquefier in order to overcome the deficiencies of the prior art. The chlorine liquefier is set higher than the oil return device, and the oil return device is set higher than the refrigerator. The oil and refrigerant of the chlorine liquefier are flowed to the oil return device for gas-liquid separation by utilizing the liquid level difference between the chlorine liquefier and the oil return device, and the oil is naturally flowed to the refrigerator by utilizing the natural slope of the pipeline and the pressure difference between the oil return device and the refrigerator air intake port, thereby realizing autonomous oil return. No power supply is required throughout the process, which not only saves energy consumption, but also makes the oil return of the refrigeration unit reliable.

[0004] According to the utility model, an automatic oil return system for a chlorine liquefier comprises: a chlorine liquefier, an oil return device and a refrigerator, wherein the liquid phase space of the chlorine liquefier is connected to the oil return device through a first pipeline, the gas phase space of the chlorine liquefier is connected to the oil return device through a second pipeline, the oil return device is connected to the refrigerator through a third pipeline, an electric heating rod is arranged in the oil return device, the chlorine liquefier is arranged at a higher position than the oil return device, the oil return device is arranged at a higher position than the refrigerator, and the third pipeline is arranged at a slope.

[0005] Preferably, the automatic oil return system further comprises a Freon storage tank, and the gas phase space of the Freon storage tank is connected to the oil return device via a fourth pipeline.

[0006] Preferably, two sight glasses are provided on the oil return device.

[0007] Preferably, a first manual valve is provided on the first pipeline, a second manual valve is provided on the second pipeline, and a third manual valve is provided on the third pipeline.

[0008] Preferably, a fourth manual valve is provided on the fourth pipeline.

[0009] Preferably, a safety valve and a fifth manual valve are provided above the oil return device, and a pressure gauge is provided on the fifth manual valve.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] By setting the chlorine liquefier higher than the oil return device, and the oil return device higher than the refrigerator, the oil return pipeline from the oil return device to the refrigerator is arranged from high to low according to the physical principle. At the same time, the inlet pressure of the refrigerator is lower than the pressure of the gas phase space of the chlorine liquefier. By using the pressure difference, the oil and refrigerant of the chlorine liquefier first flow to the oil return device for gas-liquid separation, and then the oil flows naturally to the refrigerator, thereby realizing autonomous oil return. No power supply is required throughout the process, which not only saves energy consumption, but also makes the oil return of the refrigeration unit reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model provides a schematic diagram of an automatic oil return system for a chlorine liquefier.

[0013] Illustrations: 1. Chlorine liquefier; 2. Oil return device; 3. Refrigerator; 4. First pipeline; 5. Second pipeline; 6. Third pipeline; 7. Heating rod; 8. Freon storage tank; 9. Fourth pipeline; 10. Sight glass; 11. First manual valve; 12. Second manual valve; 13. Third manual valve; 14. Fourth manual valve; 15. Fifth manual valve; 16. Safety valve; 17. Pressure gauge. DETAILED DESCRIPTION

[0014] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0016] In the present invention, unless otherwise clearly defined and limited, if the terms "install", "connect", "connect", "fix" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical signal connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0017] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are only for illustrative purposes and do not represent the only implementation method.

[0018] Reference Figure 1 , Figure 1 A schematic diagram of an automatic oil return system for a chlorine liquefier in an embodiment of the utility model is shown. The automatic oil return system for a chlorine liquefier provided by an embodiment of the utility model comprises: a chlorine liquefier 1, an oil return device 2 and a refrigerator 3. The liquid phase space of the chlorine liquefier 1 is connected to the oil return device 2 through a first pipe 4, the gas phase space of the chlorine liquefier 1 is connected to the oil return device 2 through a second pipe 5, the oil return device 2 is connected to the refrigerator 3 through a third pipe 6, an electric heating rod 7 is arranged in the oil return device 2, the chlorine liquefier 1 is arranged at a higher position than the oil return device 2, the oil return device 2 is arranged at a higher position than the refrigerator 3, and the third pipe 6 is arranged at a slope.

[0019] In one of the embodiments, further, the automatic oil return system also includes a Freon storage tank 8 , and the gas phase space of the Freon storage tank 8 is connected to the oil return device 2 through a fourth pipeline 9 .

[0020] In one of the embodiments, further, two sight glasses 10 are provided on the oil return device 2 .

[0021] In one embodiment, further, a first manual valve 11 is provided on the first pipeline 4, a second manual valve 12 is provided on the second pipeline 5, and a third manual valve 13 is provided on the third pipeline 6. The manual valves can be provided to adjust the opening of the valves to control the flow of oil and / or refrigerant, which does not affect the operation and can automatically return the oil.

[0022] In one of the embodiments, further, a fourth manual valve 14 is provided on the fourth pipeline 9 .

[0023] In one embodiment, further, a safety valve 16 and a fifth manual valve 15 are provided above the oil return device 2, and a pressure gauge 17 is provided on the fifth manual valve 15. The pressure gauge 17 can be used to observe whether a pressure difference is formed between the pressure of the oil return device 2 and the pressure of the refrigerator 3 inlet.

[0024] like Figure 1 As shown, when the automatic oil return system of the chlorine liquefier of the utility model is working, the refrigerator 3 is started. Since the setting position of the chlorine liquefier 1 is higher than the oil return device 2, and the setting position of the oil return device 2 is higher than the refrigerator 3, the third pipeline 6 is inclined, and the refrigerator inlet pressure is lower than the pressure of the gas phase space of the chlorine liquefier. The oil and refrigerant in the liquid phase space of the chlorine liquefier enter the oil return device 2 through the first pipeline 4. The heating rod 7 in the oil return device 2 heats the oil and refrigerant. After the refrigerant is heated, it evaporates into gas and escapes from the second pipeline 5 to the gas phase space of the chlorine liquefier, thereby realizing gas-liquid separation in the oil return device 2. Under the pressure of the refrigerator inlet, the oil in the oil return device 2 overflows to the refrigerator 3 to realize autonomous oil return. The liquid level of the oil in the oil return device 2 can be observed through the sight glass 10 on the oil return device 2. Under normal circumstances, the fourth manual valve 14 is in a closed state. Only when there is a fault or abnormal operation, the fourth manual valve 14 is opened to allow the oil in the oil return device 2 to flow to the refrigerator 3.

[0025] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An automatic oil return system for a chlorine liquefier, characterized in that: include: A chlorine liquefier (1), an oil return device (2) and a refrigerator (3); the liquid phase space of the chlorine liquefier (1) is connected to the oil return device (2) via a first pipe (4); the gas phase space of the chlorine liquefier (1) is connected to the oil return device (2) via a second pipe (5); the oil return device (2) is connected to the refrigerator (3) via a third pipe (6); an electric heating rod (7) is arranged in the oil return device (2); the chlorine liquefier (1) is arranged at a position higher than the oil return device (2); the oil return device (2) is arranged at a position higher than the refrigerator (3); and the third pipe (6) is arranged at a slope.

2. The automatic oil return system for a chlorine liquefier according to claim 1, characterized in that: The automatic oil return system also includes a Freon storage tank (8), and the gas phase space of the Freon storage tank (8) is connected to the oil return device (2) via a fourth pipeline (9).

3. The automatic oil return system for a chlorine liquefier according to claim 1, characterized in that: Two sight glasses (10) are arranged on the oil return device (2).

4. The automatic oil return system for a chlorine liquefier according to claim 1, characterized in that: The first pipeline (4) is provided with a first manual valve (11), the second pipeline (5) is provided with a second manual valve (12), and the third pipeline (6) is provided with a third manual valve (13).

5. The automatic oil return system for a chlorine liquefier according to claim 2, characterized in that: The fourth pipeline (9) is provided with a fourth manual valve (14).

6. The automatic oil return system for a chlorine liquefier according to claim 1, characterized in that: A safety valve (16) and a fifth manual valve (15) are arranged above the oil return device (2), and a pressure gauge (17) is arranged on the fifth manual valve (15).

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