Lubricating oil cooling water tank of large disc separator

Abstract

A lubricating oil pipeline forming a U-shaped channel and a refrigerant containing cavity surrounding the pipeline are arranged in a box body, a refrigerant inlet is formed in the bottom of the refrigerant containing cavity, and a refrigerant outlet is formed in the top of the refrigerant containing cavity. A refrigerant inlet and an oil inlet section of the U-shaped channel are arranged on the same side, and a refrigerant outlet and an oil outlet section of the U-shaped channel are arranged on the same side, so that a heat exchange mode that refrigerants and lubricating oil flow reversely in a high-temperature area and flow downstream in a low-temperature area is formed; heat exchange fins are arranged on the outer wall of the U-shaped channel in the circumferential direction. A porous ceramic area used for adsorbing bubbles can be arranged on the inner side wall of the box body. Through countercurrent flow heat exchange of the U-shaped pipeline, the heat exchange efficiency is improved, the temperature of lubricating oil can be stably controlled to be smaller than or equal to 40 DEG C, the problem of lubrication failure caused by too high oil temperature of the disc separator is solved, and therefore the reliability of the disc separator under long-term high-load operation and the service life of a bearing are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of disc centrifuge accessories, and particularly relates to a large-scale disc centrifuge lubricating oil cooling water tank. BACKGROUND

[0002] The disc centrifuge is a high-speed sedimentation type centrifuge, which can quickly complete the separation of solid-liquid mixture by virtue of a strong centrifugal force field. Due to high separation efficiency and good automation, the disc centrifuge can realize full-automatic continuous operation from feeding, separation to slag discharge, and has been widely applied to fields such as shipbuilding, food processing, biopharmaceuticals, petroleum chemical industry and environmental water treatment. Stable operation of the disc centrifuge depends on its precise transmission system, which is usually driven by a motor through a belt to drive a vertical shaft to rotate at high speed. The stability of the vertical shaft as a core transmission component is guaranteed by two sets of precise bearings above and below, and long-term reliable lubrication of the bearings is a necessary condition for normal operation of the entire equipment.

[0003] In the traditional design of the disc centrifuge, the lubrication system usually adopts the method of integrating an oil tank at the bottom of the base, and the lower bearing is directly immersed in the lubricating oil in the oil tank to obtain sufficient lubrication. The bearing located at the upper part needs to rely on a set of suction circulating system: an oil suction device is arranged at the bottom of the vertical shaft, and the lubricating oil is pumped to the upper bearing through the channel inside the shaft, and after lubrication, the lubricating oil returns to the bottom oil tank through the pre-set backflow channel on the base, so as to form a lubrication circulating loop.

[0004] However, in actual working conditions, especially under the condition of long-time high-load continuous operation, the above-mentioned traditional lubrication scheme has defects. When the disc centrifuge is running at high speed, a large amount of heat will be generated by bearing friction, oil shear and eddy current loss, which will be continuously transferred to the circulating lubricating oil. Due to the limited heat dissipation area of the traditional base oil tank, the heat accumulated in the lubricating oil during the circulation process cannot be removed in time, and the oil temperature will continue to rise. After a period of operation, the high temperature of the lubricating oil will trigger the alarm of the system oil temperature sensor.

[0005] High temperature leads to a significant decrease in the viscosity of the lubricating oil, making it difficult to form an oil film with sufficient strength and thickness between the friction pairs of the bearing, and the lubrication effect is greatly reduced, and the bearing wear is thus aggravated. SUMMARY

[0006] The present application aims to solve the problem of poor air cooling effect of the lubricating oil of the disc centrifuge.

[0007] To solve the above problems, the present application provides the following technical scheme.

[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-shaped passage is not higher than the height of the refrigerant outlet, and the height of the bottom of the U-shaped passage 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 region is arranged in the middle of the U-shaped channel, and the top surface height of the porous ceramic region 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 containing cavity, the water pressure of the cooling water at the refrigerant inlet is controlled to be 0.08-0.15 MPa, the flow of the cooling water is controlled to be 0.5-1.5 m 3 / h, and the temperature of the lubricating oil in the lubricating oil pipeline is ≤40℃. 3

[0018] The advantages and beneficial effects of the present application are that the lubricating oil pipeline is configured as a U-shaped channel inside the cooling water tank, the low-temperature refrigerant enters from the bottom of the tank and flows out from the top, and the high-temperature lubricating oil flows in from one end of the U-shaped pipeline and flows out from the other end after being cooled. By precisely controlling the layout of the refrigerant inlet and the oil inlet section on the same side of the U-shaped channel and the outlet and the oil outlet section on the same side, the refrigerant and the lubricating oil form counter-flow in the high-temperature zone with the highest heat exchange efficiency, so that the maximum average temperature difference is maintained throughout the heat exchange surface, the heat transfer is driven, the cooling time of the lubricating oil is prolonged, and the temperature of the lubricating oil can be controlled within 40℃ for a long time, thereby maintaining the stable operation of the disc separator.

[0019] In terms of structure, high-density and large-surface-area heat exchange fins are arranged on the outer wall of the U-shaped pipeline, which are made of honeycomb aluminum, so that the heat exchange area is greatly increased, the flowing refrigerant is divided and disturbed, the thermal boundary layer is efficiently destroyed, micro-turbulence is induced, and heat can quickly dissipate from the lubricating oil channel to the surrounding. The high-specific-surface-area porous ceramic region arranged on the inner wall of the tank can effectively absorb or guide the micro-bubbles that may be carried in the refrigerant or generated due to local overheating, prevent the bubbles from adhering to the outer wall of the pipeline to form a heat insulation layer, and ensure the cleanliness of the heat exchange surface and the continuous and stable heat exchange process. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the internal structure of the disc separator shown in the present application.

[0021] Figure 2 is a schematic diagram of the internal structure of the cooling water tank shown in the present application.

[0022] Figure 3 is a schematic diagram of the internal structure of the cooling water tank shown in the present application.

[0023] Figure 4 is a schematic diagram of the structure of the heat exchange fin shown in the present application.

[0024] REFERENCE SIGNS: ​1 - box, 2 - lubricating oil duct, 3 - refrigerant containing cavity, 4 - refrigerant inlet, 5 - refrigerant outlet, 6 - U-shaped channel, 7 - heat exchange fin, 8 - porous structure, 9 - porous ceramic region. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended for explanation only and are not to be limiting on the present application. In addition, it is to be noted that only the parts related to the present application are shown in the accompanying drawings for the convenience of description. All other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present application fall within the scope of the present application.

[0026] The terms "comprise" and "have" and any variations thereof, as used in the present application, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that comprises a list of steps or units is not limited to the listed steps or units but can optionally further include other steps or units not listed or can optionally further include other steps or units inherent to such processes, methods, products or apparatus.

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

[0028] Referring to Figures 1-4 The present embodiment provides a cooling water tank for a large disc separator, which comprises a box 1 and a lubricating oil duct 2 arranged through the box 1. The lower end of the lubricating oil duct 2 is connected to an oil tank of the disc separator through the box 1, and the upper end is connected to a bearing seat of the disc separator. A refrigerant containing cavity 3 is formed inside the box 1 outside the lubricating oil duct 2. A refrigerant inlet 4 is arranged at the bottom of the refrigerant containing cavity 3 through the box 1, and a refrigerant outlet 5 is arranged at the top of the refrigerant containing cavity 3. The lubricating oil duct 2 is arranged as a U-shaped channel 6 inside the box 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 end of the U-shaped channel 6 is not lower than the height of the refrigerant inlet 4.

[0029] The high-temperature lubricating oil flows into the oil inlet section of the U-shaped channel 6, flows through the U-shaped bottom elbow, and then flows out of the oil outlet section; at the same time, the low-temperature refrigerant flows from the refrigerant inlet 4 to the refrigerant containing cavity 3 from bottom to top, exchanges heat with the lubricating oil in the U-shaped channel 6, so that the refrigerant can fully cover the entire U-shaped channel 6, and heat exchange occurs between the lubricating oil channel 2 and the refrigerant by using the flow effect of the refrigerant, and at the same time, the cooling dead angle is avoided by height control, so that the lubricating oil is uniformly and fully cooled.

[0030] Specifically, the box body 1 is integrally welded and formed by 304 stainless steel, and the internal volume is designed to be 50-100 liters according to the lubricating oil circulation amount of the disc separator. A detachable cover is arranged at the top of the box body 1, which is convenient for internal cleaning and maintenance. The U-shaped channel 6 is made of copper pipe material, the outer diameter is 20 mm, and the wall thickness is 2 mm, which is connected with the external lubricating oil pipeline through flanges. The refrigerant inlet 4 and the refrigerant outlet 5 are both standard interfaces or flanges, which are convenient for docking with the external cooling water system.

[0031] In order to optimize the heat exchange efficiency between the refrigerant and the lubricating oil, the refrigerant inlet 4 of the embodiment is arranged at the bottom of the box body 1 and located at one side of the oil inlet section of the U-shaped channel 6, and the refrigerant outlet 5 is arranged at the top of the box body 1 and located at one side of the oil outlet section of the U-shaped channel 6; so that the newly-incoming refrigerant with the lowest temperature first meets the lubricating oil with the highest temperature in the oil inlet section, forming reverse flow heat exchange and maintaining the maximum heat exchange temperature difference; while in the oil outlet section, the heated refrigerant and the lubricating oil with reduced temperature flow in the same direction, although the temperature difference is reduced, but the refrigerant can still continuously absorb the heat of the lubricating oil during the flow process from the inlet to the outlet.

[0032] Specifically, the refrigerant inlet 4 and the refrigerant outlet 5 are arranged in a diagonal manner, so that the refrigerant flows along the longest path in the box body 1. This diagonal arrangement prolongs the heat exchange time between the refrigerant and the lubricating oil, and improves the utilization rate of the refrigerant. In actual operation, the cooling water enters from the lower corner inlet and flows out from the upper right corner outlet, forming a flow path through the entire box.

[0033] In order to increase the heat exchange area and strengthen the turbulent flow effect, in some embodiments, the U-shaped channel 6 is circumferentially and uniformly provided with heat exchange fins 7 along the axial direction of the U-shaped channel 6. These fins reduce the local thermal resistance to the minimum by increasing the contact area between the lubricating oil pipeline and the refrigerant; at the same time, the existence of the fins destroys the laminar boundary layer of the refrigerant, induces micro-turbulent flow, and enhances 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, so that the heat in the lubricating oil can be quickly transferred to the refrigerant.

[0034] Specifically, the heat exchange fins 7 and the U-shaped channels 6 are manufactured by extrusion process respectively and then assembled into one body, and the gap between them is coated with heat-conducting glue to ensure that the contact thermal resistance between the fins and the pipe body is extremely low. The fin height is 25 mm, the fin thickness is 1.5 mm, and the fin spacing is 8 mm. With these parameters, the heat exchange area can be increased by about 3.5 times without excessively increasing the flow resistance. The fin surface can be sandblasted to form a micro-rough structure, further strengthening the turbulent flow effect.

[0035] As a preferred embodiment, the heat exchange fins 7 are configured as a plurality of cylindrical bodies arranged along the U-shaped channels 6 in sequence in the axial direction, the inner diameter of the cylindrical body matches the outer side wall of the U-shaped channel 6, and the outer diameter of the cylindrical body is 5-10 cm. This modular cylindrical fin design is convenient for manufacturing and installation. Each cylindrical body can be independently processed and then fitted on the U-shaped channel 6, and fixed by interference fit or brazing. The cylindrical structure provides a continuous axial flow channel, allowing the refrigerant to flow smoothly.

[0036] Specifically, the cylindrical body is made of 6063 aluminum alloy material and is manufactured by extrusion process. The length of each cylindrical body is 100 mm, the outer diameter is 80 mm, and the inner diameter matches the outer diameter of the U-shaped channel 6, which is 50 mm.

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

[0038] In order to accurately control the heat exchange performance of the honeycomb aluminum, the technical solution provided by the embodiment includes that the porous structure 8 includes a plurality of densely arranged cells, the cell wall thickness is 0.04-0.08 mm, the circumscribed circle diameter of the cell is 3-10 mm, and the length of the cell is 1-3 cm. The circumscribed circle diameter affects the specific surface area and flow resistance, and the length is related to the structural strength, manufacturability and assembly difficulty.

[0039] Specifically, the cell shape of the honeycomb aluminum porous structure 8 is a regular hexagon, which provides the maximum specific surface area while having the optimal structural strength and the minimum flow resistance. The cell wall thickness is 0.06 mm, the circumscribed circle diameter is 5 mm, and the length is 2 cm.

[0040] In order to improve the corrosion resistance of the honeycomb aluminum in the cooling water environment, the technical scheme provided by the embodiment comprises that the surface of the heat exchange fin 7 made of honeycomb aluminum is subjected to anodic oxidation treatment to form a dense aluminum oxide anticorrosion layer. Chloride ions, calcium and magnesium ions and the like contained in the cooling water can cause pitting corrosion and crevice corrosion on the aluminum material, and the aluminum oxide layer formed by anodic oxidation has stable chemical properties, can effectively isolate the matrix from the corrosion medium, and prolong the service life of the equipment.

[0041] Specifically, the anodic oxidation treatment adopts a sulfuric acid system, and the thickness of the oxidation film is controlled to be 15-20 μm. After oxidation, a medium-temperature sealing treatment is performed, and a nickel salt solution is used as the sealing agent, and the treatment is performed at 80°C for 30 minutes to fully seal the micropores of the oxidation film. The honeycomb aluminum treated in this way can be stably operated in tap water with pH=6-8 without obvious corrosion.

[0042] In order to solve the problem of bubble accumulation affecting heat exchange in the cooling water, the technical scheme provided by the embodiment comprises that the inner side wall of the box body 1 is provided with a porous ceramic area 9, the specific surface area of the porous ceramic area 9 is 80 m 2 / g-280 m 2 / g, and the porous ceramic area 9 is used for adsorbing or guiding the bubbles carried or generated by the refrigerant. The cooling water will precipitate dissolved gas during heating, or generate vaporization bubbles in the local low-pressure area, and these bubbles will form a gas film on the heat exchange surface to increase the thermal resistance. The large specific surface area and hydrophilic property of the porous ceramic, combined with the flow direction guided by the diagonally arranged refrigerant inlet and refrigerant outlet, can effectively capture and guide these micro-bubbles, so that they are taken out with the main flow, and the heat exchange surface is kept clean.

[0043] Specifically, the ceramic material of the porous ceramic area 9 can be cordierite-mullite composite ceramic, and the composition is a composite system of 2MgO·2Al2O3·5SiO2 and 3Al2O3·2SiO2. The material has a low thermal expansion coefficient (1.5×10 -6 / ℃) and good thermal shock stability, and is suitable for use in temperature fluctuation environment. When prepared, the porous structure with a pore size distribution of 5-50 μm and a porosity of 40%-50% can be obtained by controlling the content of pore-forming agent and the sintering process.

[0044] In order to optimize the arrangement effect of the porous ceramic area, the technical scheme provided by the embodiment comprises that the porous ceramic area 9 is arranged at the middle part of the U-shaped channel 6, and the top surface height of the porous ceramic area 9 is not lower than the height of the refrigerant outlet 5. This position is the area where bubbles are most likely to accumulate, because as the cooling water flows upward, its temperature gradually rises, and the precipitation tendency of dissolved gas increases; at the same time, the middle part of the U-shaped channel is a relatively stable area of the flow field, and bubbles are easy to stay. By arranging the porous ceramic area at this position, the defoaming effect can be maximized.

[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 the present application is that when the disc separator is running, the high-temperature lubricating oil flows back from the bearing seat into the U-shaped channel 6 of the cooling water tank, and in the process of flowing along the pipeline 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 coolant inlet 4, flows through the heat exchange fins 7 or honeycomb aluminum porous structure 8 on the outer wall of the U-shaped channel 6 from bottom to top, and after absorbing the heat of the lubricating oil, the temperature rises and the density decreases. Under the action of buoyancy and water flow, it is discharged from the coolant outlet 5. In this process, the arrangement of the U-shaped channel 6 prolongs the residence time of the lubricating oil in the cooling area, and the counterflow composite flow mode ensures that a higher average temperature difference is maintained throughout the heat exchange path. The heat exchange fins 7 or honeycomb aluminum porous structure 8 increases the heat exchange area and destroys the thermal boundary layer by inducing turbulent flow, thereby strengthening the heat transfer process. The porous ceramic area 9 effectively absorbs and guides the micro-bubbles separated from the cooling water, preventing the bubbles from accumulating on the heat exchange surface to form an insulating layer. By precisely controlling the pressure, flow and other parameters of the cooling water, the system can stably control the temperature of the lubricating oil below 40℃, ensuring that the bearings of the disc separator are always in good lubrication state, thereby ensuring the long-term stable operation of the equipment. The whole system has compact structure, high heat exchange efficiency and reliable operation, and effectively solves the problem of overheating of the lubricating oil of the large disc separator under continuous high load working condition.

[0052] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to 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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