A separation device for oil phase and water phase in chemical production

Abstract

This invention discloses a separation device for oil and water phases in chemical production, belonging to the technical field of wastewater treatment devices. It includes a tank body, within which a filter assembly and a coalescing assembly are arranged sequentially from bottom to top. The coalescing assembly includes a coalescing filter element and further includes: a chassis fixed within the tank body, a sleeve rotatably mounted on the chassis, multiple sets of baffles fixed to the outer wall of the sleeve, forming a coalescing chamber between adjacent sets of baffles, and a coalescing cage containing the coalescing filter element inserted into the coalescing chamber; and an L-shaped tube penetrating the coalescing filter element and fixedly connected to the coalescing cage. Compared to traditional integral coalescing filter elements, this solution adopts a split modular filter element structure, significantly reducing the operating space required for filter element replacement. Simultaneously, through the coordinated operation of the adjusting and sealing components, the failed chamber can be automatically identified and the liquid inside can be drained, significantly improving the replacement efficiency of the coalescing filter element and the continuity of device operation.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a separation device for oil and water phases in chemical production. Background Technology

[0002] In the fields of chemical production, oil and gas extraction, and industrial wastewater treatment, the separation of the oil and water phases in oily wastewater is a critical treatment process. Coalescing separation technology, due to its advantages such as high separation efficiency, low energy consumption, and simple structure, is widely used in the coalescence and separation of tiny oil particles. Traditional coalescence separation devices typically have an integral coalescing filter element or a single coalescing packing layer inside the tank. As oily wastewater flows upward through the coalescing material, the dispersed oil particles adsorb, collide, and coalesce on the surface of the oleophilic and hydrophobic material, forming large oil particles that then float to the surface, achieving oil-water separation.

[0003] Chinese patent CN222975018U discloses a coalescing flotation oil removal device for oil and gas field wastewater treatment. The oily wastewater first passes through a cyclone separator to remove large-particle sediment, and then passes through an oil particle coalescing layer. Tiny oil particles gradually form an oil film on the surface of the coalescing material. After the oil film reaches a certain thickness, it transforms into larger oil droplets that are large enough to separate from the aqueous phase and rise. Subsequently, the oil particles and suspended flocs in the oily wastewater are removed by a micro-air flotation device. Finally, the floating oil enters the oil discharge device for discharge, and the oil-free wastewater is discharged through a drain pipe, thus completing the oil-water separation and achieving the purpose of oil removal. The oil removal effect is better, the wastewater treatment effect is improved, and the quality of the produced water is enhanced.

[0004] The above-mentioned devices achieve oil-water separation through coalescing materials and air flotation assistance, but they still have shortcomings in practical applications: the coalescing filter elements in the devices are mostly integral annular or cylindrical structures, which require a large operating space for installation and replacement, and the disassembly and assembly process is cumbersome and time-consuming; at the same time, when the integral coalescing filter element is partially blocked or fails, the whole unit needs to be replaced, which cannot achieve targeted replacement of individual filter elements, resulting in material waste and increased operating costs.

[0005] Therefore, it is necessary to provide a separation device for oil and water phases in chemical production to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a separation device for oil and water phases in chemical production, so as to solve the technical problems mentioned in the background art.

[0007] Based on the above ideas, the present invention provides the following technical solution: a separation device for oil phase and aqueous phase in chemical production, comprising a tank, wherein a filter assembly and a coalescing assembly are arranged sequentially from bottom to top inside the tank, the coalescing assembly comprising a coalescing filter element, and further comprising: A chassis is fixed inside the tank. A sleeve is rotatably mounted on the chassis. Multiple sets of baffles are fixed to the outer wall of the sleeve. A coalescing chamber is formed between two adjacent sets of baffles. A coalescing cage containing a coalescing filter element is inserted into the coalescing chamber. An L-shaped tube passes through the coalescing filter element and is fixedly connected to the coalescing cage. One end of the L-shaped tube extends horizontally to the outside of the coalescing cage and is inserted into the circular hole on the outer surface of the sleeve. A second sealing cap is fixed to the top of the L-shaped tube, and a first sealing cap is fitted above the second sealing cap. A sealing assembly is slidably disposed on the horizontal section of the L-shaped tube to enable or isolate the L-shaped tube from the coalescing chamber; An adjustment component is located at one end of the L-shaped tube that vertically exits the coalescing filter element. The adjustment component is used to adjust the rotation angle of the first sealing cap according to the oil layer thickness, so that the corresponding coalescing chamber is connected to the sleeve through the sealing component.

[0008] As a further aspect of the present invention: the first sealing cover and the second sealing cover are fitted together, and the first sealing cover is rotatably engaged with the L-shaped tube; the first sealing cover has a through first air inlet groove, and the second sealing cover has a through second air inlet groove. By adjusting the overlapping area of ​​the first air inlet groove and the second air inlet groove, the resistance to external gas being drawn into the L-shaped tube can be controlled.

[0009] As a further aspect of the present invention: the sealing assembly includes a columnar sealing plug, the end of the sealing plug near the sleeve is configured as a blind hole structure, and a second drain groove is provided through the hole wall. A first drain groove is provided through the pipe wall of the horizontal section of the L-shaped pipe. Under normal conditions, the first drain groove and the second drain groove are staggered.

[0010] As a further aspect of the present invention: the adjusting assembly includes a toothed cylinder sleeved on the vertical section of the L-shaped tube, and a toothed protrusion that meshes with the toothed cylinder is provided on the outer circumferential surface of the first sealing cover. A water surface float is rotatably connected to the bottom end of the toothed cylinder. The water surface float is circumferentially locked and axially slidingly engaged with the L-shaped tube. An oil surface float is provided above the water surface float. The oil surface float is sleeved on the outside of the toothed cylinder and slides along the axial direction of the toothed cylinder with the water surface float. A spiral limiting groove is provided on the outer circumferential surface of the toothed cylinder. A protrusion is fixed on the inner wall of the oil surface float. When the oil layer thickness increases, the oil surface float can move relative to the water surface float along the axial direction of the toothed cylinder. The toothed cylinder can be driven to rotate through the engagement of the protrusion and the limiting groove.

[0011] As a further aspect of the present invention: multiple sets of flow guiding units are uniformly provided on the chassis, each flow guiding unit includes a first through hole and a second through hole, and the flow guiding unit is located in the coalescence chamber, wherein one set of flow guiding units has only a second through hole.

[0012] As a further aspect of the present invention: the bottom of the coalescing cage is a solid base plate structure and a guide hole is provided on the base plate. Under normal conditions, the guide holes at the bottom of multiple coalescing cages are aligned with the second through hole.

[0013] As a further aspect of the present invention: an opening is provided on the outer wall of the tank, and the opening is sealed by a cover plate.

[0014] As a further embodiment of the present invention: a single-chamber conduit is provided at the bottom of the base plate, the top end of the single-chamber conduit is connected to the sleeve, and the bottom end of the single-chamber conduit passes downward through the tank.

[0015] As a further aspect of the present invention: the tank body is provided with a drain pipe and an oil drain pipe, which are used to drain the water phase and the oil phase, respectively.

[0016] As a further aspect of the present invention: multiple sets of the oil drain pipe and the drain pipe are provided, and each set corresponds to one of the coalescence chambers.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with the traditional integral coalescing filter element, the present solution adopts a split modular filter element structure, which greatly reduces the operating space required for filter element replacement; at the same time, through the linkage between the adjustment component and the sealing component, the failed chamber can be automatically identified and the liquid inside the chamber can be drained, which significantly improves the replacement efficiency of the coalescing filter element and the continuity of device operation. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the tank of the present invention; Figure 3 This is a distribution diagram of the flow guiding unit of the present invention; Figure 4 This is a schematic diagram of the sleeve and the circular hole structure on the sleeve of the present invention; Figure 5 This is a schematic diagram of the connection structure between the L-shaped tube and the coalescing cage of the present invention; Figure 6 This is a cross-sectional view of the coalescing filter element of the present invention; Figure 7 This is a schematic diagram showing the position of the sealing assembly of the present invention inside the L-shaped tube; Figure 8 This is the present invention. Figure 6 A magnified structural diagram at point A; Figure 9 This is the present invention. Figure 6 A magnified structural diagram at point B; Figure 10 This is the present invention. Figure 7 A magnified structural diagram at point C; Figure 11 This is a schematic diagram of the limiting groove structure of the present invention.

[0020] In the diagram: 1. Tank body; 101. Oil drain pipe; 102. Drain pipe; 103. Cover plate; 2. Airflow bend; 3. Drive unit; 4. Coalescing cage; 401. Bottom plate; 4011. Guide hole; 5. Gear cylinder; 501. Limiting groove; 6. Frame; 601. Sleeve; 6011. Circular hole; 602. Partition plate; 7. Single-chamber guide pipe; 8. Guide pipe; 9. Chassis; 901. First through hole; 902. Second through hole; 10. Oil surface float; 1001. Protrusion; 11. Water surface float; 12. L-shaped pipe; 1201. First drain trough; 13. Sealing plug; 1301. Second drain trough; 14. First sealing cover; 1401. First air inlet groove; 15. Second sealing cover; 1501. Second air inlet groove. Detailed Implementation

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] like Figures 1-11 As shown, this embodiment of the invention provides a separation device for oil phase and water phase in chemical production, including a tank 1, and a filter assembly, a coalescing assembly and a corresponding flow guiding and discharge structure disposed inside the tank 1.

[0024] like Figure 1 As shown, an inlet pipe (unlabeled) is provided at the bottom of tank 1, and the filter assembly is correspondingly located at the bottom of tank 1 and at the outlet of the inlet pipe. After the oily liquid mixture enters tank 1 through the inlet pipe, it first flows through the filter assembly, which pre-intercepts solid particles in the liquid mixture to prevent filter clogging caused by particulate impurities during subsequent agglomeration.

[0025] In this embodiment, the filtration component preferably adopts a hydrocyclone separator, which uses the principle of centrifugal force to achieve solid-liquid separation and efficiently remove solid particles from the mixed liquid; as an equivalent alternative, the filtration component can also adopt conventional structures such as a filter screen or a basket filter, which are mainly used to remove solid impurities from the mixed liquid.

[0026] Continue to refer to Figure 1 The coalescing assembly is located above the filtration assembly and mainly consists of a coalescing filter element. The coalescing filter element is made of an oleophilic-hydrophobic material, preferably polypropylene, polyester, modified glass fiber, polyethylene, or composite materials thereof. When the filtered mixed liquid flows upwards within the tank 1, tiny oil particles in the mixture are wetted, adsorbed, and coalesced on the surface of the coalescing filter element, gradually converging to form larger oil droplets. These larger oil droplets float to the upper liquid surface of the tank 1 under buoyancy, accumulating to form an oil layer of a certain thickness, thus completing the initial separation of the oil and water phases.

[0027] To facilitate the discharge of separated materials, a drain pipe 102 and an oil drain pipe 101 are respectively connected to the tank body 1. The drain pipe 102 is located at the lower part of the tank body 1 and is used to discharge the separated aqueous phase; the oil drain pipe 101 is located in the upper part of the tank body 1 and is used to discharge the coalesced oil layer. Furthermore, a sludge drain pipe can also be installed at the bottom of the tank body 1 to periodically discharge solid debris trapped by the filter assembly.

[0028] The structure of tank 1, the pipeline layout, and the basic coalescing separation principle described above are all conventional technical means for coalescing separators in this field, and will not be elaborated here. The core improvement of this invention lies in the optimized design of the installation structure and replacement mechanism of the coalescing filter element, addressing the problems of difficult disassembly and maintenance and high replacement costs of the coalescing filter element in existing devices.

[0029] Combination Figure 2 As shown, the coalescing filter element of this invention is not a one-piece structure, but rather consists of multiple independent columnar coalescing filter elements, each encapsulated within a coalescing cage 4. The horizontal projection of each coalescing filter element is fan-shaped, and the horizontal projections of multiple coalescing filter elements together form a complete annular structure. By setting the coalescing filter element as a split modular structure, on the one hand, the operating space required for replacing a single filter element is smaller, facilitating quick disassembly and maintenance; on the other hand, when some coalescing filter elements fail or become clogged, they can be replaced selectively without replacing the entire filter element set, effectively reducing consumable costs.

[0030] To facilitate the installation and positioning of multiple coalescing filter cartridges, a base 9 is fixedly installed inside the tank 1, and a frame 6 is mounted on top of the base 9. The frame 6 includes a sleeve 601 and multiple sets of partitions 602 evenly fixed along the outer circumference of the sleeve 601. The sleeve 601 is rotatably engaged with the base 9, and the sleeve 601 is coaxially arranged with the tank 1. Figure 2, Figure 3 , Figure 4 As shown, two adjacent sets of baffles 602 enclose an independent coalescing chamber. The bottom of the baffle 602 is in contact with the top of the chassis 9 and can slide relative to the chassis 9. The coalescing cage 4 is inserted into each coalescing chamber. In actual operation, the oil layer thickness in each coalescing chamber can be monitored to determine whether the corresponding coalescing filter element has failed or become clogged, thereby enabling targeted replacement and maintenance of the coalescing filter element.

[0031] Combination Figures 3-11 As shown, an L-shaped tube 12 is inserted inside the coalescing filter element. The L-shaped tube 12 passes through the coalescing filter element and the coalescing cage 4 axially and is fixedly connected to the coalescing cage 4. Figure 5 As shown, one end of the horizontal section of the L-shaped tube 12 extends to the outside of the coalescing cage 4, and a through circular hole 6011 is provided on the outer circular surface of the sleeve 601. When the coalescing cage 4 is inserted into the coalescing chamber, the end of the horizontal section of the L-shaped tube 12 can be inserted into the corresponding circular hole 6011. This structure can, on the one hand, limit the coalescing filter element in the axial direction of the tank 1, and on the other hand, selectively connect the target coalescing chamber with the sleeve 601, so as to facilitate the drainage of the mixed liquid in the coalescing chamber through the sleeve 601 and avoid liquid leakage when replacing the coalescing filter element. In actual use, the top of the coalescing cage 4 can be set as an open structure to facilitate the upward flow of liquid.

[0032] The horizontal section of the L-shaped tube 12 is equipped with a sealing assembly, which is used to achieve either communication or isolation between the L-shaped tube 12 and the coalescing chamber. A second sealing cap 15 is fixedly installed inside the L-shaped tube 12 near its top end, and a first sealing cap 14 is fitted above the second sealing cap 15; the first sealing cap 14 and the second sealing cap 15 fit together, and the first sealing cap 14 is rotatably engaged with the L-shaped tube 12. Figure 8 , Figure 10 As shown, the first sealing cover 14 has a through first air inlet groove 1401, and the second sealing cover 15 has a through second air inlet groove 1501. By adjusting the overlapping area of ​​the first air inlet groove 1401 and the second air inlet groove 1501, the intake volume and intake resistance of external gas drawn into the L-shaped pipe 12 can be controlled.

[0033] The L-shaped tube 12 is provided with an adjustment component near the top. The adjustment component is configured to adaptively adjust the rotation angle of the first sealing cover 14 according to the oil layer thickness, thereby controlling the overlapping area of ​​the first air inlet groove 1401 and the second air inlet groove 1501.

[0034] Specifically, when a coalescing filter element in a coalescing chamber fails or becomes clogged, leading to a decrease in oil droplet coalescing efficiency, the corresponding adjusting component drives the first sealing cover 14 to rotate, ensuring a large overlap between the first air inlet groove 1401 and the second air inlet groove 1501. During this time, while negative pressure is being drawn into the sleeve 601, the sealing component within the coalescing chamber is more easily moved relative to the L-shaped tube 12 under negative pressure, allowing the coalescing chamber and the L-shaped tube 12 to switch to a conductive state. After the mixed liquid in the coalescing chamber is emptied through the sleeve 601, the coalescing filter element can be quickly disassembled and replaced.

[0035] The sealing assembly includes a cylindrical sealing plug 13, which is axially slidable along the horizontal section of the L-shaped tube 12. Figure 9 As shown, the end of the sealing plug 13 near the sleeve 601 has a blind hole structure, and a second drain groove 1301 is formed through the wall of the blind hole; a first drain groove 1201 is formed through the wall of the horizontal section of the L-shaped tube 12. In the initial state, the first drain groove 1201 and the second drain groove 1301 are staggered and closed to each other. The mixed liquid entering the coalescing chamber through the chassis 9 can flow normally through the coalescing filter element. Tiny oil particles are adsorbed and coalesced on the surface of the filter element to form large oil droplets, which then float to the liquid surface, completing the oil-water separation. When the coalescing filter element in a coalescing chamber ages or becomes clogged, the oil layer thickness in that chamber is significantly lower than in other normal chambers. The corresponding adjustment component drives the first sealing cover 14 to rotate, increasing the overlap area of ​​the first air inlet groove 1401 and the second air inlet groove 1501. When negative pressure is drawn into the sleeve 601, the sealing plug 13 corresponding to that chamber slides more easily under the negative pressure, aligning and connecting the first drain groove 1201 and the second drain groove 1301. The mixed liquid in the coalescing chamber can be discharged into the sleeve 601 through the L-shaped pipe 12, providing waterless operating conditions for replacing the coalescing filter element in that chamber.

[0036] The adjustment assembly includes a toothed cylinder 5 sleeved on the vertical section of the L-shaped tube 12, as shown in the reference. Figure 8 As shown, the inner wall of the toothed cylinder 5 is uniformly provided with multiple sets of toothed grooves, and the outer circular surface of the first sealing cover 14 is provided with protruding teeth that mesh with the toothed grooves. A water surface float 11 is rotatably connected to the bottom end of the toothed cylinder 5. The water surface float 11 is sleeved on the outside of the L-shaped tube 12 and is circumferentially locked and axially slidingly engaged with the L-shaped tube 12. An oil surface float 10 is provided above the water surface float 11. The oil surface float 10 is sleeved on the outside of the toothed cylinder 5 and is slidingly engaged with the water surface float 11 along the axial direction of the toothed cylinder 5. Both the water surface float 11 and the oil surface float 10 are hollow floating structures. The overall average density of the water surface float 11 is less than that of water but greater than that of oil, so it can float at the water phase interface and sink into the oil phase. The overall average density of the oil surface float 10 is less than that of the oil, and it can float stably at the oil phase interface.

[0037] Combination Figure 11As shown, a spiral-shaped limiting groove 501 is formed on the outer circular surface of the gear cylinder 5, and a protrusion 1001 is fixed on the inner wall of the oil surface float 10. One end of the protrusion 1001 extends into the limiting groove 501 and forms a sliding fit. When the oil layer thickness changes, the oil surface float 10 can move relative to the water surface float 11 along the axial direction of the gear cylinder 5, and drive the gear cylinder 5 to rotate through the cooperation of the protrusion 1001 and the limiting groove 501.

[0038] In actual operation, the oil-containing liquid mixture is fed into the tank 1 through the side wall pipe. First, solid impurities are removed by the filter assembly, and then it flows evenly upward through the base plate 9 into each coalescing chamber. When the mixture flows through the coalescing filter element, tiny oil particles are adsorbed and coalesced on the surface of the filter element to form large oil droplets, which then float to the surface of the liquid to form an oil layer. As the thickness of the oil layer in the coalescing chamber gradually increases, the oil surface float 10 moves away from the water surface float 11 relative to the toothed cylinder 5. The toothed cylinder 5 is rotated by the cooperation of the protrusion 1001 and the limiting groove 501. Then, the first sealing cover 14 is rotated by the meshing transmission of the tooth groove and the protrusion, so that the overlapping area of ​​the first air inlet groove 1401 and the second air inlet groove 1501 is reduced. Therefore, it can be seen that the greater the oil layer thickness in the coalescing chamber, the smaller the overlap area between the first air inlet groove 1401 and the second air inlet groove 1501. When the coalescing filter element in a certain coalescing chamber fails due to aging or blockage, the oil layer thickness in that chamber is significantly lower, the first air inlet groove 1401 and the second air inlet groove 1501 maintain a large overlap area, and the other normal chambers are basically misaligned and closed. At this time, a negative pressure is drawn into the sleeve 601, and the sealing plug 13 corresponding to that coalescing chamber slides under the action of negative pressure, so that the first drain groove 1201 and the second drain groove 1301 are aligned and connected. The mixed liquid in the coalescing chamber can be quickly discharged into the sleeve 601, creating waterless operating conditions for the rapid replacement of the coalescing filter element in that chamber.

[0039] Compared with traditional integral coalescing filter cartridges, this invention adopts a split modular filter cartridge structure, which greatly reduces the operating space required for filter cartridge replacement; at the same time, through the linkage of the adjustment component and the sealing component, the failed chamber can be automatically identified and the liquid inside the chamber can be drained, which significantly improves the replacement efficiency of coalescing filter cartridges and the continuity of device operation.

[0040] Combination Figures 3-5As shown, multiple sets of flow guiding units are evenly distributed on the chassis 9. Each flow guiding unit includes a first through hole 901 and a second through hole 902, and each flow guiding unit is located below the coalescing chamber. One set of flow guiding units is denoted as flow guiding unit s, which only has a second through hole 902. The bottom of the coalescing cage 4 is a solid bottom plate 401 structure, and the bottom plate 401 has flow guiding holes 4011. In the initial state, the flow guiding holes 4011 at the bottom of the multiple sets of coalescing cages 4 are aligned with the second through holes 902, so that the mixed liquid entering the tank 1 can flow upward through the coalescing filter element. The outer wall of the tank 1 has a replacement opening at the position corresponding to the flow guiding unit s. This opening is sealed by a cover plate 103, which is hinged to the tank 1. When it is necessary to replace the coalescing filter element in a coalescing chamber, the coalescing chamber is rotated to the position of the flow guiding unit s. At this time, the flow guiding hole 4011 corresponding to the coalescing chamber is misaligned with the second through hole 902 of the flow guiding unit s. The flow guiding holes 4011 of the other coalescing chambers are aligned with the first through hole 901 of the corresponding flow guiding unit. This can prevent the mixed liquid from entering the coalescing chamber of the filter element to be replaced, and facilitate the safe disassembly and replacement of the coalescing filter element through the opening.

[0041] Combination Figures 1-3 As shown, a guide pipe 8 is coaxially fixed at the top of the sleeve 601. The top of the guide pipe 8 extends upward through the tank body 1 and forms a rotational fit with the tank body 1 through a sealed bearing. An airflow bend 2 is connected to the top of the guide pipe 8. The airflow bend 2 and the guide pipe 8 are rotatably fitted together through a sealed bearing. The airflow bend 2 is used to connect an external air pump to achieve negative pressure suction inside the sleeve 601. A drive unit 3 is installed at the top of the tank body 1. The drive unit 3 is a motor. The output shaft of the motor is connected to the guide pipe 8 through a gear set for driving the guide pipe 8 and the sleeve 601 to rotate.

[0042] like Figure 1 As shown, multiple sets of the oil drain pipe 101 and the drain pipe 102 are provided, and they are arranged in a one-to-one correspondence with each coalescence chamber.

[0043] Combination Figure 2 As shown, the bottom of the base plate 401 is provided with a single-chamber conduit 7. The top end of the single-chamber conduit 7 is connected to the sleeve 601, and the bottom end extends downward through the tank 1. A solenoid valve or a one-way valve is installed on the single-chamber conduit 7. The mixed liquid entering the sleeve 601 can be discharged through the single-chamber conduit 7 and returned to the tank 1 for re-separation.

[0044] Combination Figure 5 As shown, the bottom of the oil surface float 10 is fixed with a guide rod, which passes downward through the water surface float 11 and slides with it; the outer wall of the toothed cylinder 5 is provided with a sliding groove along the axial direction, and the inner wall of the water surface float 11 is provided with a corresponding slider, which slides linearly with the sliding groove to realize the limiting of the water surface float 11 in the circumferential direction of the toothed cylinder 5.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A separation device for oil phase and aqueous phase in chemical production, comprising a tank (1), wherein a filter assembly and a coalescing assembly are arranged sequentially from bottom to top inside the tank (1), the coalescing assembly comprising a coalescing filter element, characterized in that, Also includes: The chassis (9) is fixed inside the tank (1). A sleeve (601) is rotatably mounted on the chassis (9). Multiple sets of partitions (602) are fixed on the outer wall of the sleeve (601). A coalescing chamber is formed between two adjacent sets of partitions (602). A coalescing cage (4) containing a coalescing filter element is inserted into the coalescing chamber. L-shaped tube (12) passes through the coalescing filter element and is fixedly connected to the coalescing cage (4). The end of the L-shaped tube (12) extending horizontally to the outside of the coalescing cage (4) is inserted into the circular hole (6011) on the outer surface of the sleeve (601). A second sealing cap (15) is fixed at the top of the L-shaped tube (12), and a first sealing cap (14) is fitted above the second sealing cap (15). A sealing assembly is slidably disposed on the horizontal section of the L-shaped tube (12) to enable or isolate the L-shaped tube (12) from the coalescence chamber; An adjustment component is provided at one end of the L-shaped tube (12) that extends vertically through the coalescing filter element. The adjustment component is used to adjust the rotation angle of the first sealing cover (14) according to the oil layer thickness, so that the corresponding coalescing chamber is connected to the sleeve (601) through the sealing component.

2. The device for separating oil and aqueous phases in chemical production according to claim 1, characterized in that: The first sealing cover (14) and the second sealing cover (15) fit together, and the first sealing cover (14) rotates with the L-shaped tube. The first sealing cover (14) has a through first air inlet groove (1401), and the second sealing cover (15) has a through second air inlet groove (1501). By adjusting the overlapping area of ​​the first air inlet groove (1401) and the second air inlet groove (1501), the resistance of external gas being drawn into the L-shaped tube can be controlled.

3. The device for separating oil and aqueous phases in chemical production according to claim 2, characterized in that: The sealing assembly includes a columnar sealing plug (13), one end of which near the sleeve (601) is configured as a blind hole structure, and a second drain groove (1301) is provided through the hole wall. A first drain groove (1201) is provided through the pipe wall of the horizontal section of the L-shaped pipe (12). Under normal conditions, the first drain groove (1201) and the second drain groove (1301) are staggered.

4. The device for separating oil and aqueous phases in chemical production according to claim 3, characterized in that: The adjusting assembly includes a toothed cylinder (5) fitted onto the vertical section of the L-shaped tube (12). The outer surface of the first sealing cap (14) is provided with protruding teeth that mesh with the toothed cylinder (5). A water surface float (11) is rotatably connected to the bottom end of the toothed cylinder (5). The water surface float (11) is circumferentially locked to the L-shaped tube (12) and axially slidingly engaged. An oil surface float (10) is positioned above the water surface float (11), fitted onto the outside of the toothed cylinder (5) and floating on the oil surface. The block (10) slides in cooperation with the water surface float (11) along the axial direction of the toothed cylinder (5). A spiral limiting groove (501) is provided on the outer circular surface of the toothed cylinder (5). A protrusion (1001) is fixed on the inner wall of the oil surface float (10). When the oil layer thickness increases, the oil surface float (10) can move relative to the water surface float (11) along the axial direction of the toothed cylinder (5). The toothed cylinder (5) can be driven to rotate through the cooperation of the protrusion (1001) and the limiting groove (501).

5. The device for separating oil and aqueous phases in chemical production according to claim 1, characterized in that: Multiple sets of flow guiding units are evenly provided on the chassis (9). Each flow guiding unit includes a first through hole (901) and a second through hole (902). The flow guiding unit is located in the coalescence chamber, and one set of flow guiding units has only the second through hole (902).

6. The device for separating oil and aqueous phases in chemical production according to claim 5, characterized in that: The bottom of the coalescing cage (4) is a solid base plate (401) structure and a guide hole (4011) is provided on the base plate (401). Under normal conditions, the guide holes (4011) at the bottom of multiple coalescing cages (4) are aligned with the second through hole (902).

7. The device for separating oil and aqueous phases in chemical production according to claim 1, characterized in that: The tank (1) has an opening on its outer wall, and the opening is sealed by a cover plate (103).

8. A separation device for oil phase and aqueous phase in chemical production according to claim 6, characterized in that: The bottom of the base plate (401) is provided with a single-chamber conduit (7), the top end of the single-chamber conduit (7) is connected to the sleeve (601), and the bottom end of the single-chamber conduit (7) passes downward through the tank body (1).

9. A separation device for oil phase and aqueous phase in chemical production according to claim 1, characterized in that: The tank (1) is connected to a drain pipe (102) and an oil drain pipe (101), which are used to drain the water phase and the oil phase, respectively.

10. A separation device for oil phase and aqueous phase in chemical production according to claim 9, characterized in that: Multiple sets of the oil drain pipe (101) and the drain pipe (102) are provided, each corresponding to one of the coalescence chambers.

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