Automatic oil return system of oil collector

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By introducing an automatic control valve group and liquid level gauge into the oil collector system, combining pressurized pipelines and exhaust pipeline heating, human errors and resource waste in the oil collector return operation are solved, and the effects of automated control and resource conservation are achieved.

CN223216524UActive Publication Date: 2025-08-12XINJIANG DAQO NEW ENERGY CO LTD

View PDF 0 Cites 0 Cited by

Patent Information

Application Number: CN202422493226.1
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-10-15
Publication Date: 2025-08-12
Estimated Expiration: 2034-10-15

AI Technical Summary

Technical Problem

The oil return operation of the existing oil collector relies on manual control, which can easily lead to valve operation errors and affect production, and the heating method poses a risk of resource waste and equipment damage.

Method used

Automatic control valve group and liquid level meter are adopted to realize the automatic triggering of oil return program of the evaporator liquid level, combining heating of pressurized pipelines and exhaust pipelines to reduce human operation errors and optimize heating methods.

Benefits of technology

It realizes automatic control of oil return of oil from the oil collector, reduces equipment damage rate, reduces resource consumption, and improves production stability.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN223216524U_ABST

Patent Text Reader

Abstract

The utility model relates to an automatic oil return system of an oil collector. An automatic oil return system of an oil collector is characterized in that an evaporator is communicated with the oil collector through a first liquid conveying pipeline, and a second liquid conveying pipeline and a Freon steam pipeline are communicated with a refrigerating unit; the oil collector is communicated with the refrigerating unit through an oil return pipeline, and is communicated with the Freon steam pipeline through a balance pipeline; the balance pipeline, the first liquid conveying pipeline, the oil return pipeline and the second liquid conveying pipeline are provided with automatic control valve groups; the evaporator and the oil collector are respectively connected in series with a first liquid level meter and a second liquid level meter; the first liquid level meter is communicated with the first liquid conveying pipeline, and a manual ball valve is arranged on the communicated pipeline; the first liquid conveying pipeline is provided with a manual ball valve which is located between the evaporator and the automatic control valve set. By the adoption of the automatic oil return device, errors caused by manual operation are reduced through automatic oil return, and the damage rate of equipment is reduced.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic oil return of an oil collector, and particularly relates to an automatic oil return system for an oil collector. Background Art

[0002] In polysilicon production technology, a cryogenic system is composed of a refrigerator and an evaporator. Freon (R22) is a common refrigerant used in chemical production. During normal production, the refrigerator typically compresses the Freon into a liquid phase, which is then fed to the evaporator. The vaporization of the Freon removes heat from the material, thereby achieving cooling. However, during the Freon compression process in the refrigerator, some lubricating oil enters the evaporator along with the Freon, affecting the evaporator's heat exchange efficiency.

[0003] Currently, the existing treatment method involves performing an oil return operation on the evaporator, returning the oil in the evaporator to the oil collector through appropriate means. This method involves heating the oil collector to evaporate the Freon in the lubricating oil, and then returning the clean oil in the oil collector to the refrigeration unit through a pipeline. However, when the evaporator's liquid level is high, affecting the evaporative cooling effect, or when the unit's oil level drops significantly, on-site personnel must manually operate various valves to return the oil. This involves opening the evaporator's oil return line and observing the oil sight glass in the oil collector. When the oil level reaches a certain level, the on-site electric heater is manually activated to heat the oil. Finally, the oil sight glass in the oil collector is observed to ensure that the Freon in the lubricating oil has evaporated completely, and the lubricating oil in the original oil collector is returned to the refrigeration unit.

[0004] The existing oil return operation process has the following problems: (1) Since it is a manual operation, it is easy to cause valve operation errors, which will affect production; (2) Since the oil collector has no liquid level gauge, the internal liquid level is observed entirely by an oil sight glass, so the liquid level of the oil collector cannot be seen intuitively; (3) Since it is entirely manual operation, the operator may forget to close the oil collector after returning the oil in the oil collector to the refrigeration unit, which may cause equipment damage; (4) Traditional oil collectors use electric heating or steam heating, both of which have the disadvantage of wasting resources.

[0005] In view of this, the present invention proposes a new automatic oil return system for an oil collector to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic oil return system for an oil collector, change the oil return operation mode of the oil collector, reduce human operation errors, and thus reduce the damage rate of the equipment; change the heating mode of the collector, and reduce the consumption of resources such as electricity and steam.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is as follows:

[0008] An oil collector automatic oil return system includes: an evaporator, an oil collector, a refrigeration unit, and an electric heater;

[0009] The evaporator is connected to the oil collector via a first liquid delivery pipeline, and is connected to the refrigeration unit via a second liquid delivery pipeline and a Freon vapor pipeline;

[0010] The oil collector is connected to the refrigeration unit through an oil return line, and is connected to the Freon steam line through a balance line;

[0011] The balance pipeline, the first liquid delivery pipeline, the oil return pipeline, and the second liquid delivery pipeline are all provided with automatic control valve groups;

[0012] The evaporator and the oil collector are connected in series with the first liquid level gauge and the second liquid level gauge respectively;

[0013] The first liquid level gauge is connected to the first liquid delivery pipeline, and a manual ball valve is provided on the connected pipeline;

[0014] The first liquid delivery pipeline is provided with a manual ball valve, which is located between the evaporator and the automatic control valve group.

[0015] Furthermore, the Freon steam pipeline is connected to the upper part of the evaporator and the air inlet of the refrigeration unit respectively, and is used to transport the Freon steam to the refrigeration unit for cooling.

[0016] Furthermore, the electric heater is used to heat the oil collector.

[0017] Furthermore, the oil collector is connected to a pressurized pipeline.

[0018] Furthermore, the pressurized pipeline is provided with an automatic control valve group.

[0019] Furthermore, the pressurized pipeline is connected to the exhaust pipeline of the refrigeration unit.

[0020] Furthermore, the first liquid delivery pipeline is provided with multiple groups of manual ball valves, and the manual ball valves are connected in parallel to the first liquid delivery pipeline.

[0021] Furthermore, the oil collector is connected to a pressure gauge.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] The technical solution provided by the embodiment of the present utility model is that, during operation, when the liquid level of the evaporator is high, the oil return program is automatically triggered, and the valve of the oil collector is automatically opened to return the oil by interlocking the liquid level of the evaporator. When the liquid level of the oil collector reaches a certain height, the oil heating program is automatically triggered to evaporate the Freon carried in the oil collector; when the liquid level of the oil collector no longer drops within a certain period of time, the oil return operation is automatically triggered to return the oil in the oil collector to the refrigeration unit, thereby achieving a circulation effect.

[0024] The specific advantages are as follows:

[0025] 1. The technical solution provided by the embodiment of the present invention changes the oil return operation to automatic control, which reduces the errors caused by human operation and can effectively avoid damage to equipment and facilities. At the same time, the automatic control can accurately control the timing of oil return according to the liquid level, reducing the impact on production.

[0026] 2. The technical solution provided by the embodiment of the present invention further changes the heating method of the oil collector to connect the pressurized pipeline with the exhaust pipeline, and passes the high-temperature and high-pressure gas of the exhaust pipeline of the unit into the oil collector for heating, thereby reducing resource consumption. At the same time, it also avoids the possibility of damage to the equipment caused by dry burning of the electric heater.

[0027] 3. The technical solution provided by the embodiment of the present utility model can separate the mixed Freon and lubricating oil and reuse them to maximize the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of an automatic oil return system for an oil collector according to the present invention.

[0029] In the accompanying drawings: 1 is an evaporator, 2 is an oil collector, 3 is an electric heater, 4 is a refrigeration unit, 5 is a first liquid delivery pipeline, 6 is a balancing pipeline, 7 is a Freon steam pipeline, 8 is a second liquid delivery pipeline, 9 is an oil return pipeline, 10, 11, 12, 13, 14 are automatic control valve groups, 15 is a first liquid level gauge, 16 is a second liquid level gauge, 17, 18, 19, 20 are manual valves and ball valves, 21 is a pressurized pipeline, and 22 is a pressure gauge. DETAILED DESCRIPTION

[0030] To further illustrate the automatic oil return system for an oil collector according to the present invention and achieve its intended purpose, the following describes the specific implementation, structure, features, and functionality of the automatic oil return system for an oil collector according to the present invention, in conjunction with preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0031] The following is a detailed description of the automatic oil return system for an oil collector of the present invention in conjunction with specific embodiments:

[0032] like Figure 1 As shown, the embodiment of the present invention provides an oil collector automatic oil return system, which includes: an evaporator 1, an oil collector 2, a refrigeration unit 4, an electric heater 3, a first liquid delivery pipeline 5, a second liquid delivery pipeline 8, a Freon vapor pipeline 7, an oil return pipeline 9, and a balance pipeline 6;

[0033] The evaporator 1 is connected to the oil collector 2 via a first liquid delivery pipeline 5, and is connected to the refrigeration unit 4 via a second liquid delivery pipeline 8 and a Freon vapor pipeline 7;

[0034] The oil collector 2 is connected to the refrigeration unit 4 through the oil return line 9 and is connected to the Freon vapor line 7 through the balance line 6;

[0035] The balance pipeline 6, the first liquid delivery pipeline 5, the return oil pipeline 9, and the second liquid delivery pipeline 8 are all provided with automatic control valve groups, namely automatic control valve groups 10, 11, 13, and 12;

[0036] The evaporator 1 and the oil collector 2 are connected in series with a first liquid level gauge 15 and a second liquid level gauge 16 respectively;

[0037] The first liquid level gauge 15 is connected to the first liquid delivery pipeline 5, and a manual ball valve 17 is provided on the connected pipeline;

[0038] The first liquid delivery pipeline 5 is provided with a manual ball valve and is located between the evaporator 1 and the automatic control valve group 11 .

[0039] The technical solution provided by the embodiment of the present invention operates as follows: automatic control valve groups 11 and 13 are closed, and manual ball valve 17 and the manual ball valve located between evaporator 1 and automatic control valve group 11 are opened. When the first liquid level gauge 15 is full, automatic control valve group 11 automatically triggers to open. When the second liquid level gauge 16 is full, automatic control valve group 11 automatically triggers to close, and electric heater 3 and automatic control valve group 10 are opened to heat the oil in oil collector 2, returning the Freon contained in the lubricating oil to refrigeration unit 4 via balancing line 6 and Freon vapor line 7. When the liquid level in oil collector 2 stabilizes, automatic control valve group 10 and electric heater 3 are closed, and automatic control valve group 13 automatically triggers to open, returning the oil to the refrigeration unit for lubrication. The Freon vapor is condensed into liquid by refrigeration unit 4 and then transported to evaporator 1 via second liquid delivery line 8 for further heat exchange.

[0040] As a preference of the above embodiment, the Freon vapor pipeline 7 is connected to the upper portion of the evaporator 1 and the air inlet of the refrigeration unit 4 respectively, for conveying the Freon vapor to the refrigeration unit 4 for cooling.

[0041] As a preferred embodiment of the above, the electric heater 3 is used to heat the oil collector 2. By heating, the Freon carried in the oil collector is vaporized and then returned to the refrigeration unit 4 through the balance line 6 and the Freon vapor line 7.

[0042] As a preferred embodiment of the above, the oil collector 2 is connected to the pressurized pipeline 21. In this embodiment, the oil collector 2 is further connected to the pressurized pipeline 21. By pressurizing, this facilitates the rapid flow of Freon vapor during the heating process and ensures that the oil returns to the refrigeration unit 4 after heating stops, thereby avoiding overpressure and reducing equipment damage.

[0043] As a further preferred embodiment of the above, the pressurized pipeline 21 is provided with an automatic control valve group 12. In this embodiment, the pressurized pipeline 21 is further provided with an automatic control valve group 12. When the pressure of the oil collector 2 reaches 1 MPa, the valve 12 is automatically triggered to open, returning the oil in the oil collector 2 to the refrigeration unit 4, thus realizing automatic oil return.

[0044] As a further preferred embodiment of the above embodiment, the pressurized pipeline is connected to the exhaust pipeline of the refrigeration unit. In this embodiment, the pressurized pipeline is further limited to being connected to the exhaust pipeline of the refrigeration unit, and the high-temperature and high-pressure gas from the exhaust pipeline of the refrigeration unit 4 is passed into the oil collector 2 for heating, thereby reducing resource consumption and preventing the oil collector 2 from being damaged by the electric heater 3 due to dry heating.

[0045] As a preferred embodiment of the above embodiment, the first liquid delivery pipeline 5 is provided with multiple sets of manual ball valves 18, 19, and 20, which are connected in parallel to the first liquid delivery pipeline 5. In this embodiment, the first liquid delivery pipeline 5 is further provided with multiple sets of manual ball valves 18, 19, and 20, which are respectively connected to the upper, middle, and lower parts of the evaporator 1. By providing multiple sets of different unknown manual ball valves, the oil return system can meet different operating requirements.

[0046] As a preference of the above embodiment, the oil collector 2 is connected to a pressure gauge 22. In this embodiment, it is further limited that the oil collector 2 is connected to a pressure gauge 22, which is beneficial to the pressure of the oil collector.

[0047] The working principle of this utility model is:

[0048] First, during normal production operation, the manual valve ball valves 17-20 are in the open state, and the automatic control valve group 10, 11, 12, and 13 are in the closed state. When the liquid level of the evaporator reaches the set value, the automatic control valve group 10 and 11 can be triggered to automatically open and return oil to the evaporator.

[0049] The oil collector is then heated in two ways: 1. When the liquid level in oil collector 2 reaches a set value, the automatic control valve assembly 11 is automatically triggered to close, stopping oil return, and the electric heater 3 is automatically triggered to open, heating the oil in oil collector 2. During the heating process, the Freon carried in oil collector 2 is heated and vaporized, and then returned to the air intake of refrigeration unit 4 through automatic control valve assembly 10. 2. When the liquid level in oil collector 2 reaches a set value, the automatic control valve assembly 11 is automatically triggered to close, stopping oil return, and the automatic control valve assembly 12 is automatically triggered to pass high-temperature, high-pressure gas from the exhaust of refrigeration unit 4 into oil collector 2. During the heating process, the Freon carried in oil collector 2 is heated and vaporized, and then returned to the air intake of refrigeration unit 4 through automatic control valve assembly 10. This pressurization facilitates the rapid flow of Freon vapor during the heating process. After the Freon vapor is condensed into liquid by refrigeration unit 4, it is transported to evaporator 1 through second liquid delivery pipeline 8 for further heat exchange.

[0050] Finally, because the oil coming out of evaporator 1 carries Freon, the liquid level will continue to drop as the Freon evaporates during the heating process. When the liquid level in oil collector 2 remains unchanged for a long time during the heating process, the electric heater 3 and automatic control valve group 10 are automatically triggered to shut down, while automatic control valve group 12 remains open, pressurizing oil collector 2. When the pressure in oil collector 2 reaches 1MPa, automatic control valve group 13 is automatically triggered to open, returning the oil in oil collector 2 to refrigeration unit 4. When the liquid level gauge in oil collector 2 returns to zero, automatic control valve group 13 is automatically triggered to close, and automatic control valve group 10 is automatically triggered to open, releasing the residual pressure in oil collector 2 to the air intake line of refrigeration unit 4.

[0051] The standard parts used in this utility model can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature threads, bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology and are common knowledge in the field.

[0052] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automatic oil return system for an oil collector, characterized in that: include: Evaporator, oil collector, refrigeration unit, electric heater; The evaporator is connected to the oil collector via a first liquid delivery pipeline, and is connected to the refrigeration unit via a second liquid delivery pipeline and a Freon vapor pipeline; The oil collector is connected to the refrigeration unit through an oil return line, and is connected to the Freon steam line through a balance line; The balance pipeline, the first liquid delivery pipeline, the oil return pipeline, and the second liquid delivery pipeline are all provided with automatic control valve groups; The evaporator and the oil collector are connected in series with the first liquid level gauge and the second liquid level gauge respectively; The first liquid level gauge is connected to the first liquid delivery pipeline, and a manual ball valve is provided on the connected pipeline; The first liquid delivery pipeline is provided with a manual ball valve, which is located between the evaporator and the automatic control valve group.

2. The automatic oil return system for oil collector according to claim 1, characterized in that: The Freon steam pipeline is connected to the upper part of the evaporator and the air inlet of the refrigeration unit respectively, and is used to transport the Freon steam to the refrigeration unit for cooling.

3. The automatic oil return system for oil collector according to claim 1, characterized in that: The electric heater is used to heat the oil collector.

4. The automatic oil return system for oil collector according to claim 1, characterized in that: The oil collector is communicated with the pressurized pipeline.

5. The automatic oil return system for oil collector according to claim 4, characterized in that: The pressurized pipeline is provided with an automatic control valve group.

6. The automatic oil return system for oil collector according to claim 4, characterized in that: The pressurizing pipeline is communicated with the exhaust pipeline of the refrigeration unit.

7. The automatic oil return system for oil collector according to claim 1, characterized in that: The first liquid delivery pipeline is provided with a plurality of groups of manual ball valves, and the manual ball valves are connected in parallel to the first liquid delivery pipeline.

8. The automatic oil return system for oil collector according to claim 1, characterized in that: The oil collector is connected with a pressure gauge.