Automatic dehydration oil-water separator

Abstract

The utility model relates to an automatic dehydration oil-water separator, and relates to the technical field of oil-water separation. The device comprises a reaction kettle, a condenser communicated with the reaction kettle, a filter device which can quickly replace a filter element and is communicated with the condenser, a separation tank which is used for standing and separating water and a solvent by using a density difference and is communicated with the filter device, and a U-shaped drainage device communicated with the separation tank. The automatic dehydration oil-water separator realizes oil-water separation through esterification reaction, after the separated water and solvent are filtered, the solution enters the separation tank for standing and layering, then the water is rapidly discharged through the U-shaped drainage device by utilizing the pressure intensity principle, and the device is simple in structure. The oil-water separation device has the effects of reducing the cost of the oil-water separation device and improving the oil-water separation efficiency of the device.

Description

Technical Field

[0001] The present application relates to the technical field of oil-water separation, and in particular to an automatic dehydration oil-water separator. Background Art

[0002] Oil-water mixtures are always produced during industrial production. Direct discharge of these mixtures would cause significant environmental pollution and waste resources. Oil-water separation devices are commonly used in industry to separate oil and water, often through esterification reactions. Esterification is a reversible process. If the water in the system is not removed promptly, the reaction time will be prolonged. Therefore, to shorten the esterification time, the dehydration rate must be increased. Conventional technology utilizes water and solvent to form an azeotrope, which is then condensed into a separation tank through a condenser to separate the solvent and water. The solvent is then refluxed to the reactor, and the desorbed water is removed. The normal drainage method relies on a liquid level transmitter and a PLC (or DCS) automatic control system, linking the liquid level transmitter with a pump to achieve automatic drainage.

[0003] Regarding the above-mentioned related technologies, there is a problem that the oil-water separation device needs to be equipped with a liquid level transmitter, a water pump and a complete control system, which has high investment and maintenance costs. Failure of one link will cause the entire system to be paralyzed. Utility Model Content

[0004] In order to reduce the cost of an oil-water separation device and improve the oil-water separation efficiency of the device, the present application provides an automatic dehydration oil-water separator.

[0005] The present application provides an automatic dehydration oil-water separator, which adopts the following technical solution:

[0006] An automatic dehydration oil-water separator, comprising:

[0007] Reactor;

[0008] a condenser, the condenser being in communication with the reactor;

[0009] a filtering device, the filtering device being in communication with the condenser;

[0010] a separation tank, the separation tank being in communication with the filtering device;

[0011] A U-shaped drainage device is connected to the separation tank.

[0012] By adopting the above technical solution, the oil-water mixed liquid and the esterification solvent enter the reactor for esterification reaction, the solvent and water evaporate the water into the condenser for cooling, and then enter the filtration device to filter out impurities in the esterification wastewater, and then enter the separation tank to use the density difference between water and solvent to separate the layers. The separation tank is connected to the U-shaped drainage device to form a communicating vessel. Under the action of pressure, water will be continuously discharged from the U-shaped drainage device, thereby realizing oil-water separation.

[0013] Optionally, the U-shaped drainage device includes:

[0014] a horizontal outlet pipe, the horizontal outlet pipe being in communication with the bottom of the side wall of the separation tank;

[0015] An inverted U-shaped riser pipe, the inverted U-shaped riser pipe is connected to the horizontal outlet pipe, and the drainage outlet of the inverted U-shaped riser pipe is always at a lower level than the horizontal outlet pipe;

[0016] a first valve, the first valve being in communication with the water inlet end of the inverted U-shaped riser;

[0017] a second valve, the second valve being connected to the horizontal outlet pipe and being arranged between two connection points between the inverted U-shaped riser and the horizontal outlet pipe;

[0018] A pressure valve is connected to the top of the inverted U-shaped riser.

[0019] By adopting the above technical solution, after the water and the solution are separated due to the density difference in the separation tank, the solution at the bottom of the separation tank is water and the upper solution is the solvent. The horizontal lead-out pipe is connected to the bottom of the side wall of the separation tank. When the pressure of the solution in the separation tank is greater than the pressure of the inverted U-shaped riser, the aqueous solution is continuously discharged from the device under the action of atmospheric pressure. The speed of water discharge can be controlled by the valve. The automatic discharge of water after solution stratification can be achieved using a simple U-shaped drainage device, and the height of the interface between water and solvent can be controlled by the pressure valve to avoid accidental discharge of the solvent. The device structure is simple and easy to process and manufacture.

[0020] Optionally, the separation tank includes:

[0021] A buffer baffle, the buffer baffle being fixedly mounted on the bottom of the inner cavity of the separation tank;

[0022] An observation window, wherein the observation window is embedded in the side wall of the separation tank;

[0023] a liquid inlet pipe, the liquid inlet pipe being in communication with the bottom of the side wall of the separation tank;

[0024] a liquid inlet valve, the liquid inlet valve being connected to the liquid inlet pipe;

[0025] a reflux pipe, the reflux pipe being in communication with the top of the side wall of the separation tank;

[0026] a reflux valve, the reflux valve being in communication with the liquid inlet end of the reflux pipe;

[0027] An exhaust valve is fixedly installed on the top of the separation tank.

[0028] By adopting the above technical solution, the solution flows into the separation tank through the liquid inlet pipe, and the buffer partition is fixedly installed at the bottom of the inner cavity of the separation tank, so that after the mixture of solvent and water flows in, it is buffered on one side of the buffer partition, and then smoothly diffuses into the other side of the partition to achieve rapid separation of solvent and water. The reflux pipe is connected to the top of the side wall of the separation tank. When the liquid level rises to the reflux pipe, the solvent can be returned to the reactor for reuse. The observation window is embedded in the side wall of the separation tank, which is convenient for the user to observe the stratification of oil and solvent in the separation tank at any time, and any fault can be solved in time. The exhaust valve is fixedly installed on the top of the separation tank to keep the atmospheric pressure in the separation tank at all times, so as to facilitate the inflow and discharge of the solution in the tank. The provision of multiple valves is conducive to the start and stop of various parts of the device.

[0029] Optionally, the filter device includes a filter assembly and a quick-detach assembly, and the filter assembly is connected to the quick-detach assembly;

[0030] Wherein, the filtering component includes:

[0031] A filter box, both ends of which are connected to the condenser and the liquid inlet pipe respectively and are threadedly connected;

[0032] A filter element fixing frame, the filter element fixing frame is passed through and slidably installed in the filter box;

[0033] A filter element, wherein the filter element is embedded in the filter element fixing frame and is detachably connected to the filter element fixing frame;

[0034] A sealing strip is fixedly mounted on the peripheral side of the filter element fixing frame.

[0035] By adopting the above technical solution, the solution enters the filter housing from the condenser and is filtered through multiple sets of filter elements, removing impurities from the solution. The filter elements are embedded in the filter element fixing frame, which is fixed with a sealing strip to prevent the solution from passing through the gap between the filter element fixing frame and the filter housing without passing through the filter element. This filter removes impurities and coked products from the solution, avoids clogging valves and pipes, and increases equipment life.

[0036] Optionally, the quick-release assembly includes:

[0037] A mounting plate, the mounting plate being fixedly mounted on the filter element fixing frame;

[0038] A driving shaft, the driving shaft being rotatably and slidably mounted on the mounting plate;

[0039] A driving bevel gear, the driving bevel gear being coaxially and fixedly mounted on one end of the driving shaft;

[0040] a first rotating shaft, the first rotating shaft being rotatably and slidably mounted on the mounting plate;

[0041] a first driven bevel gear, the first driven bevel gear being meshed and connected with the driving bevel gear, the first driven bevel gear being coaxial and fixedly mounted on the first rotating shaft;

[0042] Two second driven bevel gears, the two second driven bevel gears are coaxial and fixedly mounted on both ends of the first rotating shaft;

[0043] a third driven bevel gear, the third driven bevel gear being meshed and connected with the second driven bevel gear;

[0044] Two second rotating shafts, the second rotating shafts are rotatably and slidably mounted on the mounting plate, and the third driven bevel gear is coaxially and fixedly mounted on one end of the second rotating shaft;

[0045] Two sets of fourth driven bevel gears, the two sets of fourth driven bevel gears being evenly and coaxially fixedly mounted on the second rotating shaft, and the number of the two sets of fourth driven bevel gears being no less than one;

[0046] a fifth driven bevel gear, the fifth driven bevel gear being meshed and connected with the fourth driven bevel gear;

[0047] A bolt is slidably connected to the fifth driven bevel gear.

[0048] By adopting the above technical solution, the driving shaft is rotated, and the tightening and loosening of all bolts are achieved through the mutual cooperation of the bevel gears and the rotating shaft. At the same time, providing multiple sets of filter elements can also achieve the purpose of quickly disassembling the filter element fixing frame at the same time, thereby quickly replacing the filter element. In addition, the use of multiple sets of filter elements can increase the filtration efficiency and extend the service life of the filter element.

[0049] Optionally, the horizontal height of the top of the inverted U-shaped riser is always lower than that of the return pipe.

[0050] By adopting the above technical solution, when the solution level rises to the reflux pipe, the pressure at the top of the inverted U-shaped standpipe is lower than the pressure at the reflux pipe. Water can be discharged from the inverted U-shaped standpipe, while the solvent is discharged from the reflux pipe, thereby realizing the functions of automatic reflux and automatic drainage of the solvent.

[0051] Optionally, at least one set of cavity bottom limiting bosses are fixedly installed on the bottom of the filter box, and at least one set of limiting stepped grooves are provided on the filter box.

[0052] By adopting the above technical solution, the filter element fixing frame can be stably installed in the filter box through the cavity bottom limiting boss and the filter element fixing frame, thereby avoiding misalignment of the filter element fixing frame.

[0053] Optionally, a limit step is fixedly installed on the filter element fixing frame, the limit step groove is threadedly connected to the limit step and the sealing strip is fixedly installed therebetween.

[0054] By adopting the above technical solution, the filter element fixing frame and the filter box body can be disassembled to facilitate the replacement of the filter element.

[0055] In summary, this application includes at least one of the following beneficial technical effects:

[0056] 1. The oil-water mixture and the esterification solvent enter the reactor for esterification reaction. The solvent and water evaporate the water into the condenser for cooling. The water then enters the filtration device to filter out impurities in the esterification wastewater. The water then enters the separation tank to separate the layers using the density difference between water and solvent. The separation tank is connected to the U-shaped drainage device to form a communicating vessel. Under the action of pressure, water will be continuously discharged from the U-shaped drainage device, thereby achieving oil-water separation.

[0057] 2. After the water and solution are separated due to density difference in the separation tank, the solution at the bottom of the separation tank is water and the solution at the top is solvent. The horizontal outlet pipe is connected to the bottom of the side wall of the separation tank. When the pressure of the solution in the separation tank is greater than the pressure of the inverted U-shaped riser, the aqueous solution is continuously discharged from the device under the action of atmospheric pressure. The speed of water discharge can be controlled by a valve. The simple U-shaped drainage device can realize the automatic discharge of water after solution separation, and the height of the interface between water and solvent can be controlled by a pressure valve to avoid accidental discharge of solvent. The device has a simple structure and is easy to process and manufacture.

[0058] 3. The solution flows into the separation tank through the liquid inlet pipe. The buffer partition is fixedly installed at the bottom of the inner cavity of the separation tank. After the mixture of solvent and water flows in, it is buffered on one side of the buffer partition and then diffuses smoothly into the other side of the partition to achieve rapid separation of solvent and water. The reflux pipe is connected to the top of the side wall of the separation tank. When the liquid level rises to the reflux pipe, the solvent can be returned to the reactor for reuse. The observation window is embedded in the side wall of the separation tank, which is convenient for the user to observe the stratification of oil and solvent in the separation tank at any time, so that any fault can be solved in time. The exhaust valve is fixedly installed on the top of the separation tank to keep the atmospheric pressure in the separation tank at all times, so as to facilitate the inflow and discharge of the solution in the tank. The provision of multiple valves is conducive to the start and stop of various parts of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a structural diagram of an embodiment of the present application;

[0060] Figure 2 is a structural cross-sectional view of an embodiment of the present application;

[0061] Figure 3 This is an embodiment of the present application Figure 2 A magnified view of point A;

[0062] Figure 4 It is a structural schematic diagram of the quick-disassembly assembly of an embodiment of the present application.

[0063] Description of reference numerals:

[0064] 1. Reactor; 2. Condenser; 3. Separator; 31. Buffer plate; 32. Observation window; 33. Liquid inlet pipe; 34. Liquid inlet valve; 35. Reflux pipe; 36. Reflux valve; 37. Exhaust valve; 4. U-shaped drainage device; 41. Horizontal outlet pipe; 42. Inverted U-shaped riser; 43. Pressure valve; 44. First valve; 45. Second valve; 5. Filter assembly; 51. Filter box; 511. Limiting step groove; 512. Limiting boss at the bottom of the cavity; 52. Filter element fixing frame; 521. Limiting step; 53. Filter element; 54. Sealing strip; 6. Quick disassembly assembly; 601. Mounting plate; 602. Driving shaft; 603. Driving bevel gear; 604. First rotating shaft; 605. First driven bevel gear; 606. Second driven bevel gear; 607. Third driven bevel gear; 608. Second rotating shaft; 609. Fourth driven bevel gear; 610. Fifth driven bevel gear; 611. Bolt. DETAILED DESCRIPTION

[0065] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0067] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0068] The following is combined with Figure 1-4 This application is described in further detail.

[0069] The embodiment of the present application discloses an automatic dehydration oil-water separator.

[0070] Reference Figure 1 The automatic dehydration oil-water separator includes a reactor 1, a condenser 2 connected to the reactor 1, a filtering device connected to the condenser 2, a separation tank 3 connected to the filtering device, and a U-shaped drainage device 4 connected to the separation tank 3.

[0071] When the automatic dehydration oil-water separator is in use, the oil-water mixed liquid and the esterification solvent enter the reactor 1 at the same time to carry out the esterification reaction. During the reaction, the water is evaporated and taken out by the azeotropic effect of the solvent and water. After entering the condenser 2 for cooling, it enters the filtering device to filter out impurities and coked products in the esterification wastewater, and then enters the separation tank 3 to separate the layers using the density difference between water and solvent. The U-shaped drainage device 4 is used to separate the water and solvent. The solvent returns to the reactor 1 for reaction, and the water is discharged through the U-shaped drainage device 4.

[0072] Reference Figure 1 and Figure 2 A buffer partition 31 is fixed to the bottom of the inner cavity of the separation tank 3, an observation window 32 is embedded in the side wall of the tank body, a liquid inlet pipe 33 is connected to the bottom of the side wall of the separation tank 3, and a liquid inlet valve 34 is connected to the liquid inlet pipe 33. A reflux pipe 35 is connected to the top of the side wall of the separation tank 3, and a reflux valve 36 is connected to the reflux pipe 35. An exhaust valve 37 is fixedly installed on the top of the separation tank 3. The U-shaped drainage device 4 includes a horizontal outlet pipe 41, one end of which is connected to the bottom of the side wall of the separation tank 3, and the other end is connected to the drainage end of the inverted U-shaped standpipe 42. The middle section is connected to the water inlet end of the inverted U-shaped standpipe 42, and the water inlet end of the inverted U-shaped standpipe 42 is connected to a first valve 44. A second valve 45 is connected to the horizontal outlet pipe 41 between the two connection points of the inverted U-shaped standpipe 42 and the horizontal outlet pipe 41. The horizontal height of the top of the inverted U-shaped standpipe 42 is always between the liquid inlet pipe 33 and the return pipe 35. The top of the inverted U-shaped standpipe 42 is connected to a pressure valve 43.

[0073] During operation, the automatic dehydration oil-water separator allows condensed solvent and water to enter the separator tank 3 through the liquid inlet pipe 33. A buffer partition 31 divides the bottom of the separator tank 3 into two zones: a buffer zone and a separation zone. The solvent-water mixture is buffered in the buffer zone before diffusing smoothly into the separation zone for separation. When the solvent level in the separator tank 3 rises to the level of the reflux pipe 35, the solvent automatically flows back through the reflux pipe 35 to the reactor 1 to participate in the esterification reaction again. When the first valve 44 is opened and the second valve 45 is closed, and the water level in the separator tank 3 reaches the top of the inverted U-shaped standpipe, the lower layer of water is automatically discharged through the standpipe, meeting the drainage requirement. If the first valve 44 is open but the water volume is high and the horizontal outlet pipe 41 cannot meet the drainage requirements, and the liquid level in the separator tank 3 rises above the top of the inverted U-shaped standpipe, the second valve 45 is opened, allowing the water to flow directly out of the horizontal outlet pipe 41, thus diverting the flow and improving drainage efficiency. The water-solvent stratification interface can be observed through the observation window 32 on the separation tank 3, and the height of the stratification interface can be adjusted through the pressure valve 43. When the stratification interface is too high, the pressure of the pressure valve 43 is reduced to lower the stratification interface. When the stratification interface is too low, the pressure of the pressure valve 43 is increased to raise the stratification interface to achieve the adjustment effect.

[0074] Reference Figure 2 and Figure 3 The filter device includes a filter assembly 5 and a quick-release assembly 6, and the filter assembly 5 is connected to the quick-release assembly 6. The filter assembly 5 includes a filter box 51 whose two ends are respectively connected to the condenser 2 and the liquid inlet pipe 33, a filter element fixing frame 52 that is inserted and slidably installed in the filter box 51, a filter element 53 embedded in the filter element fixing frame 52, and a sealing strip 54 fixedly installed on the side of the filter element fixing frame 52. At least one group of cavity bottom limiting bosses 512 are fixedly installed at the bottom of the filter box 51, at least one group of limiting step grooves 511 are opened on the filter box 51, and a limiting step platform 521 is fixedly installed on the filter element fixing frame 52. A sealing strip 54 is fixedly installed between the limiting step groove 511 and the limiting step platform 521, and the limiting step groove 511 and the limiting step platform 521 are threadedly connected.

[0075] Reference Figure 3 and Figure 4The quick disassembly assembly 6 includes a mounting plate 601 fixedly connected to the filter element fixing frame 52, a driving shaft 602 is rotatably and slidably mounted on the mounting plate 601, one end of the driving shaft 602 is coaxially and fixedly mounted with a driving bevel gear 603, a first rotating shaft 604 and a second rotating shaft 608 are rotatably and slidably mounted on the mounting plate 601, a first driven bevel gear 605 is coaxially and fixedly mounted on the first rotating shaft 604, and the first driven bevel gear 605 is meshed with the driving bevel gear 603, and both ends of the first rotating shaft 604 are coaxial and Two second driven bevel gears 606 are fixedly installed, and a third driven bevel gear 607 is coaxially and fixedly installed at one end of the second rotating shaft 608, and the third driven bevel gear 607 is meshed with the second driven bevel gear 606. Two groups of fourth driven bevel gears 609 are evenly and coaxially fixedly installed on the second rotating shaft 608. A fifth driven bevel gear 610 is abutted on the mounting plate 601, and the fifth driven bevel gear 610 is meshed with the fourth driven bevel gear 609, and a bolt 611 is keyed to the fifth driven bevel gear 610.

[0076] When the automatic dehydration oil-water separator is in use, water, solvent, some esterified impurities, and coked products enter the filter housing 51 through the condenser 2. The solution is then filtered through multiple sets of filter elements 53, gradually removing impurities from the solution. The filter elements 53 are embedded in the filter element fixing frame 52. The filter element fixing frame 52 is fixed with a sealing strip 54 to prevent the solution from passing through the gap between the filter element fixing frame 52 and the filter housing 51 without passing through the filter element 53. The limit step groove 511 on the filter housing 51 is threadedly connected to the limit step platform 521 on the filter element fixing frame 52, ensuring that the filter element fixing frame 52 is stably and sealedly installed in the filter housing 51. The quick-release assembly 6 allows for simultaneous removal of multiple filter element mounting frames 52 for replacement of filter elements 53. During removal, external force rotates the driving shaft 602, causing the driving bevel gear 603 to rotate accordingly. The first driven bevel gear 605 meshing with it drives the first rotating shaft 604 to rotate synchronously. The first rotating shaft 604 drives the second driven bevel gears 606 at both ends to rotate synchronously, thereby driving the third driven bevel gear 607 meshing with it to rotate. The third driven bevel gear 607 is fixedly mounted on the second rotating shaft 608, driving the second rotating shaft 608 to rotate, thereby driving the fourth driven bevel gear 609 mounted on the second rotating shaft 608 to rotate. The fifth driven bevel gear 610 meshing with the fourth driven bevel gear 609 rotates, and the fifth driven bevel gear 610 is keyed to the bolt 611, thereby driving the bolt 611 to rotate and loosen. At this point, the mounting plate 601 is lifted, and the multiple filter element mounting frames 52 fixedly mounted on the mounting plate 601 are simultaneously removed, allowing for quick replacement of the filter elements 53. On the contrary, the driving shaft 602 is rotated in the reverse direction to quickly tighten the bolt 611 and quickly install the filter element fixing frame 52.

[0077] The implementation principle of an automatic dehydration oil-water separator in an embodiment of the present application is as follows: when the automatic dehydration oil-water separator is in use, the oil-water mixed liquid and the esterification solvent enter the reactor 1 at the same time to carry out the esterification reaction, the azeotropic effect of the solvent and water evaporates the water, enters the condenser 2 for cooling, and then enters the filtering device to filter out impurities and coked products in the esterification wastewater. The filtering device can quickly disassemble and replace the filter element 53, and then enters the separation tank 3 to utilize the density difference between water and solvent to separate the layers, and then uses the pressure principle to utilize the U-shaped drainage device 4 to separate the water and solvent. The solvent returns to the reactor 1 for reaction, and the water is discharged through the U-shaped drainage device 4.

[0078] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic dehydration oil-water separator, characterized in that: include: Reactor (1); A condenser (2), the condenser (2) being in communication with the reactor (1); A filtering device, the filtering device being in communication with the condenser (2); A separation tank (3), the separation tank (3) being in communication with the filtering device; A U-shaped drainage device (4), wherein the U-shaped drainage device (4) is connected to the separation tank (3).

2. The automatic dehydration oil-water separator according to claim 1, characterized in that: The U-shaped drainage device (4) comprises: a horizontal outlet pipe (41), the horizontal outlet pipe (41) being in communication with the bottom of the side wall of the separation tank (3); an inverted U-shaped riser (42), the inverted U-shaped riser (42) being in communication with the horizontal outlet pipe (41), and the drainage outlet of the inverted U-shaped riser is always at a level lower than that of the horizontal outlet pipe (41); a first valve (44), the first valve (44) being in communication with the water inlet end of the inverted U-shaped riser (42); a second valve (45), the second valve (45) being in communication with the horizontal outlet pipe (41), the second valve (45) being arranged between two connection points of the inverted U-shaped riser (42) and the horizontal outlet pipe (41); A pressure valve (43) is connected to the top of the inverted U-shaped riser (42).

3. The automatic dehydration oil-water separator according to claim 2, characterized in that: The separation tank (3) comprises: A buffer baffle (31), the buffer baffle (31) being fixedly mounted on the bottom of the inner cavity of the separation tank (3); An observation window (32), the observation window (32) being embedded in the side wall of the separation tank (3); a liquid inlet pipe (33), the liquid inlet pipe (33) being in communication with the bottom of the side wall of the separation tank (3); a liquid inlet valve (34), the liquid inlet valve (34) being in communication with the liquid inlet pipe (33); A reflux pipe (35), the reflux pipe (35) being in communication with the top of the side wall of the separation tank (3); a reflux valve (36), the reflux valve (36) being in communication with the liquid inlet end of the reflux pipe (35); An exhaust valve (37) is fixedly mounted on the top of the separation tank (3).

4. The automatic dehydration oil-water separator according to claim 3, characterized in that: The filtering device comprises a filtering assembly (5) and a quick-detaching assembly (6), wherein the filtering assembly (5) is connected to the quick-detaching assembly (6); Wherein, the filtering component (5) comprises: A filter box (51), wherein both ends of the filter box (51) are respectively connected to the condenser (2) and the liquid inlet pipe (33) and are threadedly connected; A filter element fixing frame (52), the filter element fixing frame (52) is passed through and slidably installed in the filter box (51); A filter element (53), the filter element (53) being embedded in the filter element fixing frame (52) and being detachably connected to the filter element fixing frame (52); A sealing strip (54) is fixedly mounted on a peripheral side of the filter element fixing frame (52).

5. The automatic dehydration oil-water separator according to claim 4, characterized in that: The quick-disassembly assembly (6) comprises: A mounting plate (601), the mounting plate (601) being fixedly mounted on the filter element fixing frame (52); A driving shaft (602), the driving shaft (602) being rotatably and slidably mounted on the mounting plate (601); A driving bevel gear (603), the driving bevel gear (603) being coaxially and fixedly mounted on one end of the driving shaft (602); a first rotating shaft (604), the first rotating shaft (604) being rotatably and slidably mounted on the mounting plate (601); a first driven bevel gear (605), the first driven bevel gear (605) being meshedly connected with the driving bevel gear (603), the first driven bevel gear (605) being coaxially fixedly mounted on the first rotating shaft (604); Two second driven bevel gears (606), the two second driven bevel gears (606) being coaxial and fixedly mounted on both ends of the first rotating shaft (604); a third driven bevel gear (607), the third driven bevel gear (607) being meshedly connected with the second driven bevel gear (606); Two second rotating shafts (608), the second rotating shafts (608) are rotatably and slidably mounted on the mounting plate (601), and the third driven bevel gear (607) is coaxially and fixedly mounted on one end of the second rotating shaft (608); Two sets of fourth driven bevel gears (609), the two sets of fourth driven bevel gears (609) being evenly and coaxially fixedly mounted on the second rotating shaft (608), and the number of the two sets of fourth driven bevel gears (609) being no less than one; a fifth driven bevel gear (610), the fifth driven bevel gear (610) abutting against the mounting plate (601) and meshingly connected with the fourth driven bevel gear (609); A bolt (611) is slidably connected to the fifth driven bevel gear (610).

6. The automatic dehydration oil-water separator according to claim 3, characterized in that: The horizontal height of the top of the inverted U-shaped riser (42) is always lower than that of the return pipe (35).

7. The automatic dehydration oil-water separator according to claim 4, characterized in that: At least one set of cavity bottom limiting bosses (512) are fixedly mounted on the bottom of the filter box (51), and at least one set of limiting stepped grooves (511) are provided on the filter box (51).

8. The automatic dehydration oil-water separator according to claim 7, characterized in that: A limit step platform (521) is fixedly mounted on the filter element fixing frame (52), and the limit step groove (511) is threadedly connected to the limit step platform (521), with the sealing strip (54) fixedly mounted therebetween.

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