Large disc separator lubricating oil cooling water tank

Abstract

The utility model discloses a large -scale disc -type separator lubricating oil cooling water tank, the inside of box is provided with the lubricating oil pipeline of constituting U -shaped channel and the refrigerant containing cavity of surrounding this pipeline, refrigerant containing cavity bottom is equipped with the refrigerant inlet, top is equipped with the refrigerant export, and through with the layout of refrigerant inlet and U -shaped channel oil inlet section same side, refrigerant export and oil outlet section same side, constituted the heat exchange mode of the countercurrent of refrigerant and lubricating oil in high temperature area, in low temperature area convection, U -shaped channel outer wall periphery is provided with heat exchange fin. The inside wall of box can also be provided with the porous ceramic area for adsorbing bubble. The utility model passes through U -shaped pipeline countercurrent heat exchange, has improved the heat exchange efficiency, can control lubricating oil temperature stability in <=40 DEG C, has alleviated the lubrication failure problem of disc -type separator oil temperature excessively high leads to, thereby has guaranteed the reliability and bearing life of disc -type separator under long -term high -load operation.

Description

Technical Field

[0001] This utility model relates to the technical field of disc separator accessories, specifically to a large disc separator lubricating oil cooling water tank. Background Technology

[0002] Disc separators are high-speed sedimentation centrifuges that, thanks to their powerful centrifugal force field, can quickly separate solid-liquid mixtures. Due to their high separation efficiency and high degree of automation, they can achieve fully automatic continuous operation from feeding and separation to slag discharge. This equipment has been widely used in shipbuilding, food processing, biopharmaceuticals, petrochemicals, and environmental water treatment. The stable operation of disc separators relies on their precision transmission system, which typically consists of a motor driving a vertical shaft via a belt, causing the drum to rotate at high speed. The vertical shaft, as the core transmission component, relies on two sets of precision bearings for stability; long-term reliable lubrication of these bearings is essential for the normal operation of the entire equipment.

[0003] In the traditional disc separator design, the lubrication system usually adopts the method of integrating an oil tank at the bottom of the machine base. The lower bearing is directly immersed in the lubricating oil in the oil tank to obtain sufficient lubrication. The upper bearing relies on a suction circulation system: an oil suction device is set at the bottom of the vertical shaft to pump the lubricating oil through the channel inside the shaft to the upper bearing. After lubrication, the lubricating oil returns to the oil tank at the bottom through the preset return channel on the machine base, thus forming a lubrication circulation loop.

[0004] However, in actual operating conditions, especially under long-term, high-load continuous operation, the aforementioned traditional lubrication solutions have shortcomings. When the separator operates at high speed, bearing friction, oil shearing, and eddy current losses generate a large amount of heat, which is continuously transferred to the circulating lubricating oil. Because the heat dissipation area of ​​the traditional base oil tank is limited, the heat accumulated in the lubricating oil during circulation cannot be dissipated in time, causing the oil temperature to rise continuously. After a period of operation, excessively high lubricating oil temperature will trigger an alarm from the system's oil temperature sensor.

[0005] High temperatures cause a significant decrease in the viscosity of lubricating oil, making it difficult to form an oil film of sufficient strength and thickness between the friction pairs of the bearing. This greatly reduces the lubrication effect and exacerbates bearing wear. Utility Model Content

[0006] The present invention aims to solve the problem of poor air cooling effect for lubricating oil in disc separators.

[0007] To solve the above problems, this utility model provides the following technical solution.

[0008] A large disc separator lubricating oil cooling water tank includes a tank body, through which a lubricating oil pipe is installed. The lower end of the lubricating oil pipe passes through the tank body and connects to the oil tank of the disc separator, and the upper end of the lubricating oil pipe passes through the tank body and connects to the bearing seat of the disc separator. The interior of the housing is located outside the lubricating oil pipeline and is configured as a refrigerant receiving cavity. A refrigerant inlet is provided at the bottom of the refrigerant receiving cavity through the housing, and a refrigerant outlet is provided at the top of the refrigerant receiving cavity through the housing. The lubricating oil passage is constructed in a U-shape inside the housing. The height of the end of the U-shape is not higher than the height of the refrigerant outlet, and the height of the bottom of the U-shape is not lower than the height of the refrigerant inlet.

[0009] As a preferred technical solution, the refrigerant inlet is located at the bottom of the housing and on one side of the oil inlet section of the U-shaped channel, and the refrigerant outlet is located at the top of the housing and on one side of the oil outlet section of the U-shaped channel; so that the overall flow direction of the refrigerant in the refrigerant receiving cavity is opposite to the flow direction of the lubricating oil in the oil inlet section of the U-shaped channel, but the same as the flow direction in the oil outlet section.

[0010] As a preferred technical solution, heat exchange fins are uniformly arranged circumferentially on the outer wall of the U-shaped channel. The heat exchange fins are arranged along the axial direction of the U-shaped channel, and the edges of the heat exchange fins extend along the axial direction of the U-shaped channel, with gaps between adjacent heat exchange fins.

[0011] As a preferred technical solution, the heat exchange fins are constructed as multiple cylinders arranged sequentially along the U-shaped channel, the inner diameter of the cylinders matches the outer wall of the U-shaped channel, and the outer diameter of the cylinders is between 5cm and 10cm.

[0012] As a preferred technical solution, the heat exchange fins are made of honeycomb aluminum, and the heat exchange fins are constructed such that the honeycomb aluminum has a uniformly distributed porous structure.

[0013] As a preferred technical solution, the porous structure includes a plurality of closely spaced pores, the wall thickness of the pores is 0.04mm-0.08mm, the circumscribed circle diameter of the pores is 3mm-10mm, and the length of the pores is 1cm-3cm.

[0014] As a preferred technical solution, the surface of the heat exchange fins made of honeycomb aluminum is subjected to anodizing treatment to form a dense aluminum oxide anti-corrosion layer.

[0015] As a preferred technical solution, the inner wall of the housing is provided with a porous ceramic region, the specific surface area of ​​the porous ceramic region being 80m². 2 / g-280m 2 / g, the porous ceramic region is used to adsorb or guide the bubbles carried or generated by the refrigerant.

[0016] As a preferred technical solution, the porous ceramic zone is located in the middle of the U-shaped channel, and the height of the top surface of the porous ceramic zone is not lower than the height of the refrigerant outlet.

[0017] As a preferred technical solution, cooling water is used as the cooling medium in the refrigerant housing cavity. The water pressure at the refrigerant inlet is controlled at 0.08MPa-0.15MPa, and the flow rate of the cooling water is controlled at 0.5m³ / h. 3 / h-1.5m 3 / h, the temperature of the lubricating oil in the lubricating oil pipeline is ≤40℃.

[0018] The advantages and beneficial effects of this invention are as follows: The lubricating oil pipeline is constructed as a U-shaped channel inside the cooling water tank, allowing the low-temperature refrigerant to enter from the bottom of the tank and flow out from the top, while the high-temperature lubricating oil flows in from one end of the U-shaped pipeline, is cooled, and flows out from the other end. By precisely controlling the layout where the refrigerant inlet and the oil inlet section of the U-shaped channel are on the same side, and the outlet and the oil outlet section are on the same side, the refrigerant and lubricating oil flow in opposite directions in the high-temperature zone with the highest heat exchange efficiency. This maintains the maximum average temperature difference across the entire heat exchange surface, driving heat transfer, extending the cooling time of the lubricating oil, and allowing the lubricating oil temperature to be controlled below 40℃ for a long period, thus maintaining the stable operation of the disc separator.

[0019] At the structural level, the outer wall of the U-shaped pipe is equipped with high-density, large-surface-area heat exchange fins made of honeycomb aluminum. This significantly increases the heat exchange area while simultaneously dividing and agitating the flowing refrigerant, efficiently disrupting its thermal boundary layer, and inducing microscopic turbulence. This allows heat to dissipate rapidly from the lubricating oil channels to the surrounding areas. The high-specific-surface-area porous ceramic zone on the inner wall of the casing effectively adsorbs or guides microbubbles that may be carried in the refrigerant or generated by localized overheating. This prevents bubbles from adhering to the outer wall of the pipe and forming an insulation layer, ensuring the cleanliness of the heat exchange surface and the continuous stability of the heat exchange process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of the disc separator shown in this utility model.

[0021] Figure 2 This is one of the schematic diagrams of the internal structure of the cooling water tank shown in this utility model.

[0022] Figure 3 This is the second schematic diagram of the internal structure of the cooling water tank shown in this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the heat exchange fins shown in this utility model.

[0024] Figure label: 1-Box body, 2-Lubricating oil pipe, 3-Refrigerant containment cavity, 4-Refrigerant inlet, 5-Refrigerant outlet, 6-U-shaped channel, 7-Heat exchange fins, 8-Porous structure, 9-Porous ceramic zone. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0026] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly or implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] Please see Figures 1-4 This embodiment provides a cooling water tank for a large disc separator, including a tank body 1 and a lubricating oil pipe 2 running through its interior. The lower end of the lubricating oil pipe 2 passes through the tank body 1 and connects to the oil tank of the disc separator, while the upper end connects to the bearing seat of the disc separator. The interior of the tank body 1, outside the lubricating oil pipe 2, forms a refrigerant receiving cavity 3. A refrigerant inlet 4 is located at the bottom of the refrigerant receiving cavity 3, passing through the tank body 1, and a refrigerant outlet 5 is located at the top. The lubricating oil pipe 2 is configured as a U-shaped channel 6 inside the tank body 1. The height of the end of the U-shaped channel 6 is not higher than the height of the refrigerant outlet 5, and the height of the bottom of the U-shaped channel 6 is not lower than the height of the refrigerant inlet 4.

[0029] High-temperature lubricating oil flows in from the inlet section of the U-shaped channel 6, flows through the bottom bend of the U-shape, and flows out from the outlet section. At the same time, low-temperature refrigerant flows from the refrigerant inlet 4 from bottom to top through the refrigerant receiving cavity 3, and exchanges heat with the lubricating oil in the U-shaped channel 6. This allows the refrigerant to fully cover the entire U-shaped channel 6, and to exchange heat with the lubricating oil channel 2 by utilizing the flow effect of the refrigerant. At the same time, the height control avoids cooling dead zones, so that the lubricating oil is cooled evenly and fully.

[0030] Specifically, the housing 1 is integrally welded from 304 stainless steel, with an internal volume designed to be 50-100 liters based on the lubricating oil circulation volume of the disc separator. A removable cover is installed on top of housing 1 for easy internal cleaning and maintenance. The U-shaped channel 6 uses copper tubing with an outer diameter of 20mm and a wall thickness of 2mm, connecting to the external lubricating oil pipeline via flanges. Both the refrigerant inlet 4 and refrigerant outlet 5 use standard interfaces or flanges for easy connection to an external cooling water system.

[0031] To optimize the heat exchange efficiency between the refrigerant and the lubricating oil, in this embodiment, the refrigerant inlet 4 is located at the bottom of the housing 1 and on one side of the oil inlet section of the U-shaped channel 6, and the refrigerant outlet 5 is located at the top of the housing 1 and on one side of the oil outlet section of the U-shaped channel 6. This allows the newly introduced refrigerant with the lowest temperature to first meet the lubricating oil with the highest temperature in the oil inlet section, forming a counter-current flow heat exchange and maintaining the maximum heat exchange temperature difference. In the oil outlet section, the heated refrigerant and the lubricating oil with the lower temperature flow in the same direction. Although the temperature difference is reduced, the refrigerant can still continuously absorb heat from the lubricating oil during its flow from the inlet to the outlet.

[0032] Specifically, the refrigerant inlet 4 and refrigerant outlet 5 are arranged diagonally, allowing the refrigerant to flow along the longest path within the housing 1. This diagonal arrangement extends the heat exchange time between the refrigerant and lubricating oil, improving refrigerant utilization. In actual operation, cooling water enters from the lower corner inlet and exits from the upper right corner outlet, forming a flow path that runs through the entire housing.

[0033] To increase the heat exchange area and enhance the turbulence effect, in some embodiments, heat exchange fins 7 are uniformly arranged circumferentially on the outer wall of the U-shaped channel 6, and the heat exchange fins 7 are arranged along the axial direction of the U-shaped channel 6. These fins minimize local thermal resistance by increasing the contact area between the lubricating oil pipe and the refrigerant; at the same time, the presence of the fins disrupts the laminar boundary layer of the refrigerant, inducing micro-turbulence and enhancing the heat exchange effect on the refrigerant side. The close contact between the fins and the outer wall of the U-shaped channel 6 maintains efficient heat conduction, allowing heat in the lubricating oil to be quickly transferred to the refrigerant.

[0034] Specifically, the heat exchange fins 7 and the U-shaped channel 6 are manufactured separately using an extrusion process and then assembled into one piece. The gap between them is coated with thermally conductive adhesive to ensure extremely low contact thermal resistance between the fins and the pipe substrate. The fin height is 25mm, the thickness is 1.5mm, and the fin spacing is 8mm. Using these parameters, the heat exchange area can be increased by approximately 3.5 times without excessively increasing flow resistance. The fin surface can be sandblasted to form a micro-rough structure, further enhancing the turbulence effect.

[0035] In a preferred embodiment, the heat exchange fins 7 are constructed as multiple cylindrical bodies arranged sequentially along the U-shaped channel 6, with the inner diameter of the cylindrical body matching the outer wall of the U-shaped channel 6, and the outer diameter of the cylindrical body ranging from 5cm to 10cm. This modular cylindrical fin design facilitates manufacturing and installation; each cylindrical body can be independently machined and fitted onto the U-shaped channel 6, secured by interference fit or brazing. The cylindrical structure provides a continuous axial flow channel, allowing for smooth refrigerant flow.

[0036] Specifically, the cylinder is made of 6063 aluminum alloy through an extrusion process. Each cylinder is 100mm long, with an outer diameter of 80mm, and an inner diameter that matches the outer diameter of the U-shaped channel 6 at 50mm.

[0037] In some embodiments, the heat exchange fins 7 are made of honeycomb aluminum, and the heat exchange fins 7 include 6-7 segments. The honeycomb aluminum has a uniformly distributed porous structure 8. As a functional material with high porosity, the unique porous characteristics of honeycomb aluminum provide a huge specific surface area; at the same time, the regularly arranged pores can divide the flowing refrigerant into countless fine streams, inducing strong micro-turbulence and enhancing the heat transfer process.

[0038] To precisely control the heat exchange performance of honeycomb aluminum, the technical solution provided in this embodiment includes a porous structure 8 comprising multiple closely spaced pores. The wall thickness of the pores is 0.04mm-0.08mm, the circumscribed circle diameter of the pores is 3mm-10mm, and the length of the pores is 1cm-3cm. The circumscribed circle diameter affects the specific surface area and flow resistance, while the length relates to structural strength, manufacturing process, and assembly difficulty.

[0039] Specifically, the honeycomb aluminum porous structure 8 has a hexagonal pore shape, which provides the maximum specific surface area while exhibiting optimal structural strength and minimal flow resistance. The pore wall thickness is 0.06 mm, the circumscribed circle diameter is 5 mm, and the length is 2 cm.

[0040] To improve the corrosion resistance of honeycomb aluminum in cooling water environments, the technical solution provided in this embodiment includes anodizing the surface of the heat exchange fins 7 made of honeycomb aluminum to form a dense alumina anti-corrosion layer. Chloride ions, calcium and magnesium ions in the cooling water can cause pitting and crevice corrosion of the aluminum material, while the alumina layer formed by anodizing has stable chemical properties and can effectively isolate the substrate from the corrosive medium, extending the service life of the equipment.

[0041] Specifically, the anodizing process uses a sulfuric acid system, with the oxide film thickness controlled at 15-20 μm. After oxidation, a medium-temperature sealing treatment is performed using a nickel salt solution at 80°C for 30 minutes to fully seal the micropores of the oxide film. The resulting honeycomb aluminum can operate stably in tap water with a pH of 6-8 without significant corrosion.

[0042] To address the issue of air bubble accumulation in cooling water affecting heat exchange, this embodiment provides a technical solution including the provision of a porous ceramic zone 9 on the inner wall of the housing 1, the porous ceramic zone 9 having a specific surface area of ​​80 m². 2 / g-280m 2 / g, the porous ceramic zone 9 is used to adsorb or guide bubbles carried or generated by the refrigerant. During the heating process, cooling water will release dissolved gases or generate vaporized bubbles in local low-pressure areas. These bubbles adhere to the heat exchange surface and form a gas film, increasing thermal resistance. The large specific surface area and hydrophilic properties of the porous ceramic, combined with the flow direction guided by the diagonally arranged refrigerant inlet and outlet, can effectively capture and guide these microbubbles, causing them to be carried out with the main flow, keeping the heat exchange surface clean.

[0043] Specifically, the ceramic material for the porous ceramic region 9 can be a cordierite-mullite multiphase ceramic, with a composition of a composite system of 2MgO·2Al2O3·5SiO2 and 3Al2O3·2SiO2. This material has a low coefficient of thermal expansion (1.5 × 10⁻⁶). -6 With good thermal shock resistance (°C), it is suitable for use in environments with fluctuating temperatures. By controlling the content of the pore-forming agent and the sintering process, a porous structure with a pore size distribution of 5-50 μm and a porosity of 40%-50% can be obtained during preparation.

[0044] To optimize the arrangement of the porous ceramic zone, the technical solution provided in this embodiment includes placing the porous ceramic zone 9 in the middle of the U-shaped channel 6, and ensuring that the top surface of the porous ceramic zone 9 is not lower than the height of the refrigerant outlet 5. This location is where bubbles are most likely to accumulate because as the cooling water flows upward, its temperature gradually increases, increasing the tendency for dissolved gases to precipitate; simultaneously, the middle of the U-shaped channel is a relatively stable flow field, making it easy for bubbles to remain. Placing the porous ceramic zone here maximizes its defoaming effect.

[0045] In one embodiment, a cover is provided on top of the housing, and the porous ceramic area can be made into a porous ceramic plate, which is directly inserted into the middle of the U-shaped channel. The porous ceramic plate is 30mm thick and is fixed to the inner wall of the housing by slots on both sides, making it easy to remove for cleaning or replacement periodically. A 2mm gap is left between the ceramic plate and the inner wall of the housing for thermal expansion compensation.

[0046] To ensure the cooling system operates at a relatively low cost, the technical solution provided in this embodiment includes using cooling water as the cooling medium within the refrigerant housing 3, controlling the water pressure at the refrigerant inlet 4 at 0.08MPa-0.15MPa, and controlling the cooling water flow rate at 0.5m³ / min. 3 / h-1.5m 3 / h, the temperature of the lubricating oil in lubricating oil pipeline 2 is ≤40℃.

[0047] Specifically, softened water is recommended for cooling, with a hardness controlled at <0.03 mmol / L and a chloride ion concentration <50 mg / L to prevent scaling and pitting. The system is equipped with pressure gauges and flow meters to monitor operating parameters in real time. When the oil temperature exceeds 40℃, the cooling water flow rate can be increased via the regulating valve to ensure the oil temperature remains within a safe range.

[0048] To enhance system reliability and ease of maintenance, this embodiment includes an automatic vent valve at the top of housing 1 to remove gas accumulated at the top of the system. The vent valve employs a float-type structure; when gas accumulates to a certain amount, the float descends and opens the valve to automatically release gas. Additionally, a drain valve is located at the bottom of housing 1 to facilitate the periodic removal of any potentially deposited impurities.

[0049] Specifically, the automatic exhaust valve is installed at the highest point of the housing 1, near the refrigerant outlet 5, to ensure that the gas can be completely discharged.

[0050] To monitor the system's operating status, in some embodiments, a pair of temperature sensors are installed at the inlet and outlet of the lubricating oil pipeline 2 to monitor the temperature drop of the lubricating oil in real time. The temperature signal is transmitted to the central control room, allowing operators to adjust the cooling water flow rate for precise temperature control. When the temperature difference between the inlet and outlet oil is less than 5°C, it indicates insufficient cooling, requiring inspection of the cooling water system or cleaning of the heat exchange surfaces.

[0051] The working principle of this invention is as follows: When the disc separator is running, high-temperature lubricating oil flows back from the bearing housing into the oil inlet section of the U-shaped channel 6 of the cooling water tank. As it flows along the pipe to the oil outlet section, its heat is transferred to the external cooling water through the pipe wall. The cooling water enters the tank 1 from the refrigerant inlet 4 and flows upward through the heat exchange fins 7 or the honeycomb aluminum porous structure 8 on the outer wall of the U-shaped channel 6. After absorbing the heat from the lubricating oil, its temperature rises and its density decreases. Under the action of buoyancy and water flow, it is discharged from the refrigerant outlet 5. In this process, the arrangement of the U-shaped channel 6 prolongs the residence time of the lubricating oil in the cooling zone, while the counter-current composite flow mode ensures that a high average temperature difference is maintained throughout the heat exchange path. The heat exchange fins 7 or the honeycomb aluminum porous structure 8 increase the heat exchange area and, by inducing turbulence, disrupt the thermal boundary layer, thus enhancing the heat transfer process. The porous ceramic zone 9 effectively adsorbs and guides the microbubbles precipitated in the cooling water, preventing the bubbles from accumulating on the heat exchange surface to form an insulating layer. By precisely controlling parameters such as cooling water pressure and flow rate, the system can stably maintain the lubricating oil temperature below 40℃, ensuring that the disc separator bearings are always in good lubrication condition, thus guaranteeing long-term stable operation of the equipment. The entire system has a compact structure, high heat exchange efficiency, and reliable operation, effectively solving the problem of lubricating oil overheating in large disc separators under continuous high-load conditions.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A large disc separator lubricating oil cooling water tank, characterized in that, Includes a housing (1), inside which a lubricating oil pipe (2) is installed. The lower end of the lubricating oil pipe (2) passes through the housing (1) and connects to the oil tank of the disc separator. The upper end of the lubricating oil pipe (2) passes through the housing (1) and connects to the bearing seat of the disc separator. The interior of the housing (1) is located outside the lubricating oil pipe (2) and is configured as a refrigerant receiving cavity (3). The bottom of the refrigerant receiving cavity (3) passes through the housing (1) and is provided with a refrigerant inlet (4). The top of the refrigerant receiving cavity (3) passes through the housing (1) and is provided with a refrigerant outlet (5). The lubricating oil pipe (2) is constructed as a U-shaped channel (6) inside the housing (1). The height of the end of the U-shaped channel (6) is not higher than the height of the refrigerant outlet (5), and the height of the bottom of the U-shaped channel (6) is not lower than the height of the refrigerant inlet (4).

2. The lubricating oil cooling water tank for a large disc separator according to claim 1, characterized in that, The refrigerant inlet (4) is located at the bottom of the housing (1) and on one side of the oil inlet section of the U-shaped channel (6), and the refrigerant outlet (5) is located at the top of the housing (1) and on one side of the oil outlet section of the U-shaped channel (6); so that the overall flow direction of the refrigerant in the refrigerant receiving cavity (3) is opposite to the flow direction of the lubricating oil in the oil inlet section of the U-shaped channel (6) and the same as the flow direction in the oil outlet section.

3. A large disc separator lubricating oil cooling water tank according to claim 1 or 2, characterized in that, The outer wall of the U-shaped channel (6) is uniformly provided with heat exchange fins (7) along the circumferential direction, and the heat exchange fins (7) are arranged along the axial direction of the U-shaped channel (6).

4. The lubricating oil cooling water tank for a large disc separator according to claim 3, characterized in that, The heat exchange fins (7) are constructed as multiple cylinders arranged sequentially along the U-shaped channel (6) with their inner diameter matching the outer wall of the U-shaped channel (6), and the outer diameter of the cylinder is between 5cm and 10cm.

5. A large disc separator lubricating oil cooling water tank according to claim 3, characterized in that, The heat exchange fins (7) are made of honeycomb aluminum and are constructed as a whole. The honeycomb aluminum has a uniformly distributed porous structure (8).

6. A large disc separator lubricating oil cooling water tank according to claim 5, characterized in that, The porous structure (8) includes a plurality of closely spaced pores, the wall thickness of which is 0.04mm-0.08mm, the outer diameter of which is 3mm-10mm, and the length of which is 1cm-3cm.

7. A large disc separator lubricating oil cooling water tank according to claim 5 or 6, characterized in that, The heat exchange fins (7) made of honeycomb aluminum are anodized to form a dense aluminum oxide anti-corrosion layer.

8. A large disc separator lubricating oil cooling water tank according to claim 1, characterized in that, The inner wall of the housing (1) is provided with a porous ceramic region (9), and the specific surface area of ​​the porous ceramic region (9) is 80m². 2 / g-280m 2 / g, porous ceramic zone (9) is used to adsorb or guide the bubbles carried or generated by the refrigerant.

9. A large disc separator lubricating oil cooling water tank according to claim 8, characterized in that, The porous ceramic zone (9) is located in the middle of the U-shaped channel (6), and the height of the top surface of the porous ceramic zone (9) is not lower than the height of the refrigerant outlet (5).

10. A large disc separator lubricating oil cooling water tank according to claim 1, characterized in that, The refrigerant containment cavity (3) uses cooling water as the cooling medium. The water pressure at the refrigerant inlet (4) is controlled at 0.08MPa-0.15MPa, and the flow rate of the cooling water is controlled at 0.5m³ / h. 3 / h-1.5m 3 / h, the temperature of the lubricating oil in the lubricating oil pipeline (2) is ≤40℃.

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