A waste oil hydrogenation primary distillation tower top oil-water gas treatment device

Abstract

The present invention provides an oil-water gas treatment device at the top of a waste oil hydrogenation primary distillation tower, which belongs to the technical field of oil-water gas treatment, and includes a tank body, a gas-liquid separation mechanism and an oil-water separation mechanism, wherein the gas-liquid separation mechanism includes a filter screen 1 and a filter screen 2; the filter screen 1 and the filter screen 2 are both conical, and the meshes on the filter screen 1 and the filter screen 2 are arranged in a staggered manner; the oil-water separation mechanism includes a lifting plate, a drainage cylinder, a drainage pipeline, a partition, an oil drainage pipeline, a pressure rod 1, a pressure rod 2, and a hydraulic oil pipe; the drainage cylinder is provided with a drainage hole 1, and the drainage pipeline is provided with a drainage hole 2 that can communicate with the drainage hole 1, and a baffle that can block gas is elastically connected in the oil drainage pipeline, and a limit groove is provided on the oil drainage pipeline below the baffle. The present invention can reduce the fluctuation of the liquid level of the oil-water mixture, can discharge oil and water in time, and avoid the phenomenon that water is discharged from the oil drainage pipeline due to excessive water, and can filter gas to improve the separation effect of oil, water and gas.

Description

Technical Field

[0001] The invention relates to the technical field of oil, water and gas treatment, and in particular to an oil, water and gas treatment device at the top of a waste oil hydrogenation primary distillation tower. Background Art

[0002] Motor vehicle maintenance and enterprises will produce various waste oils, waste gasoline, waste transformer oil, etc. during the production process. At present, in the process of waste oil hydrogenation, the primary distillation tower is one of the important equipment in the distillation process. According to the difference in boiling points of different components, the components are separated by heating and condensation. In the primary distillation tower, crude oil or other raw materials are heated to boiling, and the generated steam rises to the top of the tower. The steam at the top of the tower condenses back into liquid, and the remaining steam continues to rise. There are multiple layers of tower plates in the tower. The steam contacts the liquid on the tower plate to achieve heat and mass exchange, so that components with different boiling points are gradually separated. The steam at the top of the tower usually contains lighter hydrocarbon components, while the liquid at the bottom of the tower contains heavier components. After the gas at the top of the tower is cooled by the cooler, it is partially condensed into liquid. This part of the liquid and the uncondensed gas enter the oil-water-gas treatment device at the top of the tower to separate the three phases of oil, water and gas, ensuring that the oil phase and water phase can be effectively collected and treated. Usually, the oil phase will be sent to the corresponding storage or treatment facilities, the water phase will be discharged through the drainage system, and the gas can be recycled or discharged.

[0003] The patent document with the announcement number CN208574425U discloses an oil-water gas treatment device at the top of the waste oil hydrogenation primary distillation tower, which uses a filter component to separate gas and oil-water mixture, and the oil-water mixture falls into the lower end of the tank body and stands still to achieve water and oil stratification, and then the oil is guided to the oil outlet by a scraper fan. However, after the gas and the oil-water mixture are separated by filter paper, the oil-water mixture drips into the box at the lower end. Due to the different densities of water and oil, the oil floats on the surface, and the disorderly falling of the oil-water mixture easily causes water surface fluctuations, affecting the stratification of water and oil. In addition, when the oil-water mixture falls, under the rotation of the scraper fan, the oil-water mixture may not have time to be stratified, and is guided to the oil outlet by the scraper fan, resulting in the separated oil being mixed with some water, affecting the quality of the oil output. The oil-water gas treatment device cannot separate water and oil in time, cannot judge the distribution of oil and water inside, and easily causes incomplete separation. Summary of the invention

[0004] In view of this, the present invention provides an oil-water gas treatment device at the top of a waste oil hydrogenation primary distillation tower, aiming to solve the technical problems in the prior art that the liquid level of the oil-water mixture is easily fluctuated and the oil and water cannot be separated in time.

[0005] In order to solve the above technical problems, the present invention provides an oil-water gas treatment device at the top of a waste oil hydrogenation primary distillation tower, comprising a tank body, a gas-liquid separation mechanism and an oil-water separation mechanism arranged in the tank body, wherein the gas-liquid separation mechanism comprises a filter screen 1 elastically connected to the upper part of the tank body, and a filter screen 2 sleeved in the filter screen 1 and fixedly connected to the tank body; the filter screen 1 and the filter screen 2 are both conical, and the meshes on the filter screen 1 and the filter screen 2 are staggered;

[0006] The oil-water separation mechanism comprises a lifting plate elastically connected to the lower part of the tank body, a drainage cylinder fixedly connected to the middle part of the lifting plate, a drainage pipe arranged in the drainage cylinder, a partition plate fixedly connected to the upper end of the drainage cylinder and capable of filtering oil, an oil drainage pipe arranged in the drainage pipe, a pressure rod 1 fixedly connected to the lifting plate, a pressure rod 2 fixedly connected to the filter screen 1, and a hydraulic oil pipe connecting the pressure rod 1 and the pressure rod 2;

[0007] The drainage cylinder is provided with a drainage hole 1, the drainage pipe is provided with a drainage hole 2 which can communicate with the drainage hole 1, the oil drainage pipe is elastically connected with a baffle which can block gas, and the oil drainage pipe is provided with a limiting groove below the baffle.

[0008] By adopting the above technical solution, the hydraulic oil pipe is filled with hydraulic oil, and the hydraulic oil pushes the pressure rod 2 to press the filter down, and the filter 1 and the filter 2 are fitted. After the oil-water gas mixture enters the tank body, it first contacts the upper filter 1 and the filter 2. At this time, the filter 1 and the filter 2 are in a merged state, the mesh is closed, and the oil-water gas is liquefied on the filter 1 and the filter 2. The oil-water mixture will slide along the conical filter 1 and the filter 2 to the inner wall of the tank body, and slowly flow down along the inner wall and fall onto the lifting plate, reducing the oil-water mixture directly dripping on the lifting plate, causing fluctuations in the liquid level of the oil-water mixture on the lifting plate, which is conducive to maintaining the stratification effect of oil and water. At the same time, the merging of the filter 1 and the filter 2 is conducive to the insulation of the steam originally having a certain temperature and increasing the fluidity of the oil. The oil-water mixture is gradually stratified in the tank body. When the liquid on the lifting plate reaches the set value, under the action of pressure, the lifting plate moves down, and the drainage hole 1 and the drainage hole 2 are connected, so that the water in the lower layer is discharged from the drainage pipe. When the lifting plate descends, it drives the first pressure rod to descend, the hydraulic oil in the hydraulic oil pipeline descends, the hydraulic pressure on the second pressure rod decreases, the filter screen rises, the filter screen 1 and the filter screen 2 open, the mesh opens, and the gas passes through the mesh of the second filter screen and the filter screen 1 in turn and is discharged from the tank body. The double-layer filtration is beneficial to improve the cleanliness of the gas. The oil in the upper layer of the oil-water mixture is filtered through the partition and enters the oil discharge pipeline. When the gravity of the oil above the baffle is greater than the elastic force, the baffle descends into the limit groove, and the oil is discharged from the oil discharge pipeline through the gap between the limit groove and the baffle. When the gravity of the oil above the baffle is less than the elastic force, the baffle rises to the top of the limit groove. When the gravity of the liquid above the lifting plate is less than the elastic force, the lifting plate rises, the pressure rod 1 rises, and the hydraulic oil in the hydraulic oil pipeline pushes the pressure rod 2 down, and the pressure rod 2 presses the filter screen 1. The present invention can reduce the fluctuation of the liquid level of the oil-water mixture, can discharge the oil and water in time, avoid the occurrence of the phenomenon that water is discharged from the oil discharge pipeline due to excessive water, and can filter the gas to improve the separation effect of oil, water and gas.

[0009] Preferably, an air outlet is provided on the tank body at the upper part of the filter screen 1, a connecting column is fixedly connected in the tank body, the connecting column passes through the filter screen 1 and the filter screen 2, a spring 1 is connected between the filter screen 1 and the connecting column, and the filter screen 2 is fixedly connected to the connecting column.

[0010] By adopting the above technical solution, when the pressure rod 2 is pressed down, the filter 1 drops, the spring 1 is compressed, the filter 1 and the filter 2 are merged, and the mesh holes are closed, which is beneficial to the heat preservation of the tank body. When the hydraulic pressure of the hydraulic oil applied to the pressure rod 2 is reduced, under the elastic force of the spring 1, the filter 1 rises, the filter 1 and the filter 2 open, the mesh holes open, and the gas is discharged from the outlet after double-layer filtration, which helps to maintain the cleanliness of the gas.

[0011] Preferably, a feed inlet is provided on the tank body below the filter screen 2, and a drain outlet communicated with the drain pipe and an oil outlet communicated with the oil drain pipe are provided below the feed inlet.

[0012] By adopting the above technical scheme, the oil-water-gas mixture enters the tank body from the feed port, and after separation in the tank body, the gas is discharged from the gas outlet, the oil is discharged from the oil outlet, and the water is discharged from the drain port, thereby realizing the separation of oil, water and gas.

[0013] Preferably, a connecting ring is fixedly connected to the upper end of the drainage cylinder, the partition is fixedly connected to the connecting ring in a ring shape, the partition is staggered in two layers, a conical plate is fixedly connected to the end of the partition, and the oil drainage pipe is arranged in the connecting ring.

[0014] By adopting the above technical solution, the oil in the upper layer of the oil-water mixture is filtered through the partition and reaches the oil discharge pipe. The staggered double-layer partitions can perform two filtrations to improve the cleanliness of the oil.

[0015] Preferably, the limiting groove is annular, the inner diameter of the limiting groove is larger than the outer diameter of the baffle, a connecting plate is fixedly connected to the inner wall of the oil discharge pipe above the baffle, and a second spring is connected between the connecting plate and the baffle.

[0016] By adopting the above technical solution, the inner diameter of the limit groove is larger than the outer diameter of the baffle, and a gap is left between the limit groove and the baffle. When the baffle drops into the limit groove, the oil can be discharged from the oil drain pipe through the gap between the baffle and the limit groove.

[0017] Preferably, the pressure rod 1 and the pressure rod 2 are slidably connected in the hydraulic oil pipe, the hydraulic oil pipe is filled with hydraulic oil, the hydraulic oil pipe is located in the inner wall of the tank body, and the upper end and the lower end of the hydraulic oil pipe both extend out of the inner wall of the tank body.

[0018] By adopting the above technical solution, the hydraulic oil in the hydraulic oil pipe can push the pressure rod 1 and the pressure rod 2 to move, thereby realizing the lifting and lowering of the filter screen 1, which is beneficial to improving the separation effect of oil, water and gas.

[0019] Preferably, a groove is provided at the lower portion of the tank body, a guide column capable of extending into the groove is fixedly connected to the lower end of the lifting plate, and a spring three is connected between the groove and the lifting plate.

[0020] By adopting the above technical solution, the lifting plate drives the guide column to rise and fall in the groove, thereby realizing the separation of water and oil.

[0021] Preferably, the lower end surface of the filter screen one is provided with a dredging column which can extend into the mesh of the filter screen two.

[0022] By adopting the above technical solution, when filter one and filter two are merged, the clearing column slowly extends into the mesh of filter two, which can clear the droplets hanging on the mesh, so that the droplets reach the inner wall of the tank along filter two and fall along the inner wall of the tank, which is beneficial to keep filter two clean.

[0023] The beneficial effects of the above technical solution of the present invention are as follows:

[0024] 1. The present invention is provided with a double-layer conical filter screen, and the filter screen 1 and the filter screen 2 can be combined. The filter screen 1 and the filter screen 2 are in a combined state, and the mesh holes are closed. The oil and water gas are liquefied on the filter screen 1 and the filter screen 2, and the oil-water mixture slides along the conical filter screen 1 and the filter screen 2 to the inner wall of the tank body, and slowly flows down along the inner wall and falls onto the lifting plate, thereby reducing the fluctuation of the liquid level of the oil-water mixture on the lifting plate caused by the oil-water mixture directly dripping onto the lifting plate, which is beneficial to maintaining the stratification effect of oil and water; at the same time, the combination of the filter screen 1 and the filter screen 2 is beneficial to the heat preservation of the steam originally having a certain temperature and increasing the fluidity of the oil.

[0025] 2. The lifting plate of the present invention can discharge water according to the weight of the liquid it receives, and the baffle can discharge oil according to the weight of the oil it receives. The oil and water can be discharged in time to avoid the phenomenon that water is discharged from the oil discharge pipe due to excessive water. The gas can also be filtered to improve the separation effect of oil, water and gas.

[0026] 3. The present invention controls the opening and closing of filter screen 1 and filter screen 2 by the movement of the lifting plate. When the lifting plate moves down, water is discharged, filter screen 1 and filter screen 2 are opened, and double-layer filtration is performed on the gas; when the lifting plate returns to its original position, filter screen 1 and filter screen 2 are closed, which is beneficial to maintaining the temperature in the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure inside the oil-water-gas treatment device at the top of the waste oil hydrogenation primary distillation tower of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the tank body of the present invention;

[0029] Figure 3 It is a cross-sectional view of the oil-water-gas treatment device at the top of the waste oil hydrogenation primary distillation tower of the present invention;

[0030] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0031] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0032] Figure 6 It is a schematic diagram of the structure of the lifting plate, drainage cylinder and partition of the present invention.

[0033] In the figure: 1. connecting column; 2. spring one; 3. filter screen one; 4. tank body; 5. filter screen two; 6. partition; 7. connecting ring; 8. drain cylinder; 9. lifting plate; 10. spring three; 11. feed inlet; 12. air outlet; 13. oil outlet; 14. drain outlet; 15. groove; 16. guide column; 17. dredging column; 18. oil drain pipe; 19. baffle; 20. limit groove; 21. connecting plate; 22. spring two; 23. drain pipe; 24. drain hole one; 25. drain hole two; 26. pressure rod one; 27. pressure rod two; 28. hydraulic oil pipe. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 6 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] Example

[0036] This embodiment provides a waste oil hydrogenation primary distillation tower top oil-water gas treatment device, such as Figure 1 As shown, it includes a tank body 4, a gas-liquid separation mechanism and an oil-water separation mechanism arranged in the tank body 4.

[0037] like Figure 2-Figure 5 As shown, the gas-liquid separation mechanism includes a filter screen 1 3 elastically connected to the upper part of the tank body 4, and a filter screen 2 5 sleeved in the filter screen 1 3 and fixedly connected to the tank body 4; the filter screen 1 3 and the filter screen 2 5 are both conical, and the meshes on the filter screen 1 3 and the filter screen 2 5 are arranged alternately; the tank body 4 is provided with an air outlet 12 at the upper part of the filter screen 1 3, and a connecting column 1 is fixedly connected in the tank body 4, and the connecting column 1 passes through the filter screen 1 3 and the filter screen 2 5, and a spring 1 2 is connected between the filter screen 1 3 and the connecting column 1, and the filter screen 2 5 is fixedly connected to the connecting column 1. A feed port 11 is provided on the tank body 4 below the filter screen 2 5, and a drain port 14 communicating with the drain pipe 23 and an oil outlet 13 communicating with the oil drain pipe 18 are provided below the feed port 11. The oil-water-gas mixture enters the tank body 4 from the feed port 11. After separation in the tank body 4, the gas is discharged from the gas outlet 12, the oil is discharged from the oil outlet 13, and the water is discharged from the drain port 14, thereby achieving the separation of oil, water and gas.

[0038] like Figure 2-Figure 5As shown, the oil-water separation mechanism includes a lifting plate 9 elastically connected to the lower part of the tank body 4, a drainage cylinder 8 fixedly connected to the middle part of the lifting plate 9, a drainage pipe 23 arranged in the drainage cylinder 8, a partition 6 fixedly connected to the upper end of the drainage cylinder 8 and provided with oil filtering, an oil drainage pipe 18 arranged in the drainage pipe 23, a pressure rod 1 26 fixedly connected to the lifting plate 9, a pressure rod 2 27 fixedly connected to the filter screen 1 3, and a hydraulic oil pipe 28 connecting the pressure rod 1 26 and the pressure rod 2 27. The pressure rod 1 26 and the pressure rod 2 27 are slidably connected in the hydraulic oil pipe 28, and the hydraulic oil pipe 28 is filled with hydraulic oil. The hydraulic oil pipe 28 is located in the inner wall of the tank body 4, and the upper end and the lower end of the hydraulic oil pipe 28 both extend out of the inner wall of the tank body 4. The hydraulic oil in the hydraulic oil pipe 28 can push the pressure rod 1 26 and the pressure rod 2 27 to move, so as to realize the lifting and lowering of the filter screen 1 3, which is beneficial to improving the separation effect of oil, water and gas. In this embodiment, three hydraulic oil pipes 28 are provided, and a plurality of hydraulic oil pipes 28 may also be provided. The number of the first pressure rod 26 and the second pressure rod 27 is the same as the number of the hydraulic oil pipes 28 .

[0039] like Figure 6 As shown, the upper end of the drain cylinder 8 is fixedly connected with a connecting ring 7, the partition 6 is annularly fixedly connected to the connecting ring 7, the partition 6 is staggered in two layers, the end of the partition 6 is fixedly connected with a conical plate, and the oil discharge pipe 18 is arranged in the connecting ring 7. The oil in the upper layer of the oil-water mixture is filtered through the partition 6 and reaches the oil discharge pipe 18. The staggered double-layer partitions 6 can perform two filtrations to improve the cleanliness of the oil.

[0040] like Figure 5 As shown, the drain cylinder 8 is provided with a drain hole 1 24, the drain pipe 23 is provided with a drain hole 25 that can communicate with the drain hole 1 24, the drain cylinder 8 and the drain pipe 23 are fitted, and a baffle 19 that can block gas is elastically connected in the oil drain pipe 18, and a limit groove 20 is provided below the baffle 19 on the oil drain pipe 18. The limit groove 20 is annular, and the inner diameter of the limit groove 20 is larger than the outer diameter of the baffle 19. A connecting plate 21 is fixedly connected to the inner wall of the oil drain pipe 18 above the baffle 19, and a spring 22 is connected between the connecting plate 21 and the baffle 19. The inner diameter of the limit groove 20 is larger than the outer diameter of the baffle 19, and a gap is left between the limit groove 20 and the baffle 19. When the baffle 19 drops into the limit groove 20, the oil can be discharged from the oil drain pipe 18 through the gap between the baffle 19 and the limit groove 20.

[0041] The hydraulic oil pipe 28 is filled with hydraulic oil, and the hydraulic oil pushes the pressure rod 27 to press the filter 1 3 downward, so that the filter 1 3 fits the filter 2 5, and the spring 1 2 is compressed. After the oil-water gas mixture enters the tank body 4 from the feed port 11, it first contacts the upper filter 1 3 and the filter 2 5. At this time, the filter 1 3 and the filter 2 5 are in a merged state, and the mesh is closed. The oil-water gas is liquefied on the filter 1 3 and the filter 2 5. The oil-water mixture will slide along the conical filter 1 3 and the filter 2 5 to the inner wall of the tank body 4, and slowly flow down along the inner wall and fall onto the lifting plate 9, reducing the oil-water mixture directly dripping on the lifting plate 9, causing fluctuations in the liquid level of the oil-water mixture on the lifting plate 9, which is conducive to maintaining the stratification effect of oil and water. At the same time, the merging of the filter 1 3 and the filter 2 5 is conducive to the heat preservation of the steam originally having a certain temperature and increasing the fluidity of the oil. The oil-water mixture gradually separates into layers in the tank 4. When the liquid on the lifting plate 9 reaches the set value, the lifting plate 9 moves down under the action of pressure, and the drainage hole 1 24 and the drainage hole 2 25 are connected, so that the water in the lower layer enters the drainage pipe 23 and is discharged from the drainage port 14. When the lifting plate 9 descends, the pressure rod 1 26 is driven to descend, the hydraulic oil in the hydraulic oil pipe 28 is lowered, and the hydraulic pressure on the pressure rod 2 27 is reduced. Under the action of the spring 1 2, the filter screen 1 3 rises, the filter screen 1 3 and the filter screen 2 5 are opened, and the mesh is opened. The gas passes through the mesh of the filter screen 2 5 and the filter screen 1 3 in turn and is discharged from the gas outlet 12. The double-layer filtration is conducive to improving the cleanliness of the gas. The oil in the upper layer of the oil-water mixture is filtered by the partition 6 and enters the oil discharge pipe 18. When the gravity of the oil above the baffle 19 is greater than the elastic force, the baffle 19 descends into the limit groove 20, and the oil passes through the gap between the limit groove 20 and the baffle 19 and is discharged from the oil outlet 13. When the weight of the oil above the baffle 19 is less than the elastic force, the baffle 19 rises to the top of the limit groove 20, and when the weight of the liquid above the lifting plate 9 is less than the elastic force, the lifting plate 9 rises, the pressure rod 1 26 rises, and the hydraulic oil in the hydraulic oil pipe 28 pushes the pressure rod 2 27 down, and the pressure rod 27 presses down the filter screen 1 3. This embodiment can reduce the fluctuation of the liquid level of the oil-water mixture, can discharge the oil and water in time, avoid the phenomenon that water is discharged from the oil discharge pipe 18 due to excessive water, and can filter the gas to improve the separation effect of oil, water and gas.

[0042] As a preferred method of this embodiment, Figure 3 As shown, a groove 15 is provided at the lower part of the tank body 4, a guide column 16 which can extend into the groove 15 is fixedly connected to the lower end of the lifting plate 9, and a spring 10 is connected between the groove 15 and the lifting plate 9. The lifting plate 9 drives the guide column 16 to rise and fall in the groove 15 to achieve separation of water and oil.

[0043] like Figure 4As shown, the lower end surface of the filter screen 1 3 is provided with a dredging column 17 that can extend into the mesh of the filter screen 2 5. When the filter screen 1 3 and the filter screen 2 5 are combined, the dredging column 17 slowly extends into the mesh of the filter screen 2 5, and can dredge the droplets hanging on the mesh, so that the droplets reach the inner wall of the tank body 4 along the filter screen 2 5 and fall along the inner wall of the tank body 4, which is conducive to keeping the filter screen 2 5 clean.

[0044] The method of using this embodiment is as follows:

[0045] 1. The oil-water-gas mixture enters the tank body 4 from the feed port 11, the filter screen 1 3 and the filter screen 2 5 are in a combined state, the mesh is closed, the oil-water-gas is liquefied on the filter screen 1 3 and the filter screen 2 5, and the oil-water mixture slides along the conical filter screen 1 3 and the filter screen 2 5 to the inner wall of the tank body 4, and slowly flows down along the inner wall and falls onto the lifting plate 9;

[0046] 2. The oil-water mixture gradually forms layers in the tank body 4. When the liquid on the lifting plate 9 reaches the set value, the lifting plate 9 moves downward under the action of pressure, and the drainage hole 1 24 and the drainage hole 2 25 are connected, so that the water in the lower layer enters the drainage pipe 23 and is discharged from the drainage port 14; while the lifting plate 9 descends, the pressure rod 1 26 is driven to descend, the hydraulic oil in the hydraulic oil pipe 28 descends, the hydraulic pressure on the pressure rod 2 27 decreases, the filter screen 1 3 rises, the filter screen 1 3 and the filter screen 2 5 are opened, the mesh is opened, and the gas passes through the mesh of the filter screen 2 5 and the filter screen 1 3 in turn and is discharged from the gas outlet 12; the oil in the upper layer of the oil-water mixture is filtered by the partition plate 6 and enters the oil drainage pipe 18. When the gravity of the oil above the baffle plate 19 is greater than the elastic force, the baffle plate 19 descends into the limit groove 20, and the oil passes through the gap between the limit groove 20 and the baffle plate 19 and is discharged from the oil outlet 13;

[0047] 3. When the gravity of the oil above the baffle 19 is less than the elastic force, the baffle 19 rises to above the limit groove 20. When the gravity of the liquid above the lifting plate 9 is less than the elastic force, the lifting plate 9 rises, the pressure rod 1 26 rises, and the hydraulic oil in the hydraulic oil pipe 28 pushes the pressure rod 2 27 down, and the pressure rod 27 presses the filter screen 3 downward.

[0048] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A waste oil hydrogenation primary distillation tower top oil-water gas treatment device, comprising a tank body (4), a gas-liquid separation mechanism and an oil-water separation mechanism arranged in the tank body (4), characterized in that: The gas-liquid separation mechanism comprises a filter screen 1 (3) elastically connected to the upper part of the tank body (4), and a filter screen 2 (5) sleeved inside the filter screen 1 (3) and fixedly connected to the tank body (4); the filter screen 1 (3) and the filter screen 2 (5) are both conical, and the mesh holes on the filter screen 1 (3) and the filter screen 2 (5) are arranged in a staggered manner; The oil-water separation mechanism comprises a lifting plate (9) elastically connected to the lower part of the tank body (4), a drainage cylinder (8) fixedly connected to the middle part of the lifting plate (9), a drainage pipe (23) arranged in the drainage cylinder (8), a partition (6) fixedly connected to the upper end of the drainage cylinder (8) and capable of filtering oil, an oil drainage pipe (18) arranged in the drainage pipe (23), a pressure rod 1 (26) fixedly connected to the lifting plate (9), a pressure rod 2 (27) fixedly connected to the filter screen 1 (3), and a hydraulic oil pipe (28) connecting the pressure rod 1 (26) and the pressure rod 2 (27); The drainage cylinder (8) is provided with a drainage hole 1 (24), the drainage pipe (23) is provided with a drainage hole 2 (25) which can communicate with the drainage hole 1 (24), a baffle (19) which can block gas is elastically connected in the oil drainage pipe (18), and a limiting groove (20) is provided on the oil drainage pipe (18) below the baffle (19); An air outlet (12) is provided on the tank body (4) at the upper part of the filter screen 1 (3); a connecting column (1) is fixedly connected inside the tank body (4); the connecting column (1) passes through the filter screen 1 (3) and the filter screen 2 (5); a spring 1 (2) is connected between the filter screen 1 (3) and the connecting column (1); the filter screen 2 (5) is fixedly connected to the connecting column (1); The tank body (4) is provided with a feed inlet (11) below the second filter screen (5), and below the feed inlet (11) are provided with a drain outlet (14) communicating with the drain pipe (23) and an oil outlet (13) communicating with the oil drain pipe (18); The upper end of the drainage cylinder (8) is fixedly connected to a connecting ring (7), the partition (6) is annularly fixedly connected to the connecting ring (7), the partition (6) is staggered in two layers, the end of the partition (6) is fixedly connected to a conical plate, and the oil drainage pipeline (18) is arranged in the connecting ring (7); The limiting groove (20) is annular, and the inner diameter of the limiting groove (20) is larger than the outer diameter of the baffle (19). A connecting plate (21) is fixedly connected to the inner wall of the oil discharge pipe (18) above the baffle (19), and a second spring (22) is connected between the connecting plate (21) and the baffle (19).

2. The waste oil hydrogenation primary distillation tower top oil-water gas treatment device according to claim 1, characterized in that: The first pressure rod (26) and the second pressure rod (27) are slidably connected in the hydraulic oil pipe (28), the hydraulic oil pipe (28) is filled with hydraulic oil, the hydraulic oil pipe (28) is located inside the inner wall of the tank body (4), and the upper end and the lower end of the hydraulic oil pipe (28) both extend out of the inner wall of the tank body (4).

3. The waste oil hydrogenation primary distillation tower top oil-water gas treatment device according to claim 2, characterized in that: A groove (15) is provided at the lower portion of the tank body (4), a guide column (16) capable of extending into the groove (15) is fixedly connected to the lower end of the lifting plate (9), and a spring three (10) is connected between the groove (15) and the lifting plate (9).

4. The waste oil hydrogenation primary distillation tower top oil-water gas treatment device according to claim 3, characterized in that: The lower end surface of the filter screen one (3) is provided with a dredging column (17) which can extend into the mesh of the filter screen two (5).

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