An oil-water separator for treating emulsified oil

Abstract

The invention discloses an oil-water separator for treating emulsified oil, comprising a horizontal tank body, a demulsifying filler arranged in the horizontal tank body, the horizontal tank body being connected to a horizontal tank body oil bag, the discharge end of the horizontal tank body being connected to a vertical tank body, the vertical tank body being connected to the vertical tank body oil bag and a drain; a filter element is arranged in the vertical tank body, and the inner cavity of the filter element is connected to the drain. Compared with the prior art, the oil-water separator for treating emulsified oil can gather and grow most of the oil droplets for removal through the gradient structure demulsifying filler in the horizontal tank body that is not blocked by impurities, and the remaining small amount of oil droplets and impurities are isolated and blocked by the filter element in the vertical tank body, and the oily wastewater with a large amount of impurities is treated with high precision by first removing oil and then removing slag.

Description

Technical Field

[0001] The invention relates to the technical field of oil-water separation, in particular to an oil-water separator for treating emulsified oil in the presence of a large amount of impurities. Background Art

[0002] At present, most industries involve oil-water separation, including the separation of water after extraction in the reagent production process, and the use of hot steam condensation in oil refining, which will produce a large amount of oily wastewater. The floating oil and dispersed oil in this part of wastewater are relatively easy to treat, while the emulsified oil wastewater, which is more difficult to treat, often needs to be treated with drugs. If it contains impurities, it is even more difficult to deal with the oil or the impurities first. If the impurities are isolated first, the oil will quickly clog the material, resulting in frequent backwashing or replacement; if the oil is removed first, it can often only be treated to the extent of floating oil and some dispersed oil; high-precision treatment requires the use of chemical dosing, which has a long process chain, occupies a large area, and has high labor maintenance costs.

[0003] To this end, the Chinese invention patent with the announcement number CN201240883Y discloses an oil-water separation device, including a tank body, a coalescing filter element, a porous baffle plate and a bracket, wherein: the tank body adopts a horizontal tilting structure, an oily sewage inlet is provided on one side, an oil collecting chamber with an oil discharge and exhaust port is installed on the top of the tank body on the other side, and a drain port is opened at the bottom of the tank body, the entire tank body is tilted downward from the oil collecting chamber to the oily sewage inlet, and forms an angle of 1° to 5° with the horizontal plane, and the entire tank body is fixed on the ground with a bracket. The oil-water separation device uses a coalescing filter element and a porous baffle plate to separate oil and wastewater based on the Stock's principle, and discharges them from the oil discharge port and the drain port respectively.

[0004] However, in actual production activities, the composition of oil and water discharged from industry is complex. In addition to wastewater and emulsified oil, the oil and water also include a large amount of heavy oil and solid waste residue. The above oil-water device can only obtain separated emulsified oil and a mixture of heavy oil and wastewater containing solid waste residue, but cannot completely separate the wastewater. Therefore, it is necessary to improve the existing oil-water separation device. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, an oil-water separator is provided which removes oil first and then removes slag, thereby achieving high-precision oil removal and slag removal.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an oil-water separator for treating emulsified oil, comprising a horizontal tank body, a demulsifying filler is arranged in the horizontal tank body, the horizontal tank body is connected to a horizontal tank body oil bag, the discharge end of the horizontal tank body is connected to a vertical tank body, the vertical tank body is connected to the vertical tank body oil bag and a drain port; a filter element is arranged in the vertical tank body, and the inner cavity of the filter element is connected to the drain port.

[0007] When the oil-water separator of the above technical solution is in operation, industrial oily wastewater is passed into the horizontal tank body. After encountering the demulsifying filler, since the demulsifying filler has a strong lipophilicity to oil and is also hydrophobic, when the oil and water pass through the demulsifying filler, most of the oil droplets of the demulsified oil and the dispersed oil adhere to the surface of the demulsifying filler. As the amount of oil-water mixture passing through increases, small oil droplets gradually gather to form large oil droplets and break away from the surface of the demulsifying filler, and these oil droplets enter the oil bag of the horizontal tank body; after passing through the demulsifying filler, most of the oil droplets are removed, and the remaining small amount of oil droplets that have been gathered flow into the vertical tank body with the water flow. The hydrophilic and oleophobic filter element blocks the remaining waste residue and oil droplets in the oil and water on the outside of the filter element, while the wastewater enters the inner cavity of the filter element and is discharged through the drain port, and the oil droplets and waste residue enter the oil bag of the horizontal tank body. When the oil-water separator of this technical solution is in operation, the demulsifying filler in the horizontal tank body is used to absorb and gather most of the oil droplets in the oil and water, so that the oil droplets gradually grow and enter the oil bag of the horizontal tank body, while most of the wastewater, solid residues in the wastewater and a small amount of oil droplets enter the vertical tank body, and are easily blocked by the filter element, thereby isolating the oil droplets and waste residues from the outside. The oil droplets will float or sink in the cavity, and the waste residues and residual oil droplets will enter the oil bag of the vertical tank body, while the wastewater will be discharged from the drain port. In this way, the oil droplets entering the vertical tank body are very few, so that the surface of the filter element can be easily restored, and the service life of the entire filter element is greatly extended. Overall, the present invention utilizes a grading method to remove most of the oil in the presence of impurities, and then remove the residue from the wastewater containing a small amount of oil, thereby solving the problem that it is difficult to efficiently separate oil and water in the presence of impurities, and achieving high-precision oil removal and residue removal.

[0008] Preferably, the horizontal tank body oil bag includes an upper oil bag connected to the top of the horizontal tank body, the upper oil bag is arranged between the discharge end of the horizontal tank body and the demulsifying filler, and a light oil discharge port is opened on the upper oil bag.

[0009] By adopting the above technical solution, the oil droplets gathered on the surface of the demulsifying filler are enlarged and separated from the surface of the demulsifying filler, and the light oil with lower density floats to the upper oil bag. After a lot of light oil is collected in the upper oil bag, the light oil discharge port is opened to discharge the collected light oil.

[0010] Preferably, the horizontal tank body oil bag further comprises a lower oil bag connected to the bottom of the horizontal tank body, the lower oil bag is arranged between the discharge end of the horizontal tank body and the demulsifying filler, and a heavy oil discharge port is opened on the lower oil bag.

[0011] By adopting the above technical solution, the oil droplets gathered on the surface of the demulsifying filler are enlarged and separated from the surface of the demulsifying filler, and the heavy oil with higher density sinks into the lower oil bag. After a lot of heavy oil is collected in the lower oil bag, the heavy oil discharge port is opened to discharge the collected heavy oil.

[0012] The vertical tank body oil bag includes an oil re-drainage port opened on the side wall of the vertical tank body.

[0013] By adopting the above technical solution, after the oil re-drainage port is opened, the heavy oil with higher density and part of the solid waste residue in the oil droplets isolated outside the filter element can be discharged.

[0014] The vertical tank body oil bag also includes a light oil discharge port opened on the top of the vertical tank body.

[0015] By adopting the above technical solution, the light oil with lower density in the oil droplets isolated outside the filter element floats to the upper part of the inner cavity of the vertical tank body. When the vertical tank body is filled with fluid, the light oil drain port is opened to discharge the light oil floating on the fluid.

[0016] Preferably, a baffle with mesh holes is further provided in the horizontal tank body, and the outer edge of the baffle is fixedly connected to the inner wall of the horizontal tank body; the baffle and the demulsifying filler are arranged in sequence along the flow direction of oil and water.

[0017] By adopting the above technical solution, after the oily wastewater enters the horizontal tank body, it first encounters a baffle with mesh holes, and then flows from the mesh holes to the demulsifying filler. The baffle is used to slow down the fluid, ensuring that the fluid in the horizontal tank body has sufficient time to contact the demulsifying filler, so that the demulsifying filler can fully absorb the oil droplets in the fluid, thereby ensuring the oil-water separation effect.

[0018] Preferably, the filter element is in the shape of a vertically arranged long strip, with the bottom being the water outlet.

[0019] By adopting the above technical solution, the length of the filter element is increased, thereby expanding the surface area of ​​the filter element. By increasing the contact area between oil and water and the filter element, the possibility of the mesh being blocked by oil and waste residue during the use of the filter element is reduced, which is conducive to the wastewater in the oily wastewater to smoothly enter the inner cavity of the filter element, and then pass through the bottom end of the filter element, i.e. the water outlet end, and then be discharged from the drain port.

[0020] Preferably, a plurality of filter elements are provided.

[0021] By adopting the above technical solution, the number of filter elements is increased, thereby expanding the contact area between the fluid and the filter element, further improving the oil-blocking filtering effect, and reducing the possibility of clogging.

[0022] Preferably, the vertical tank body includes an upper cabin body and a lower cabin body which are arranged in isolation, the filter element is arranged in the upper cabin body, the oil rearrangement port is opened at the bottom position of the upper cabin body, the upper cabin body is connected with the discharge end of the horizontal tank body, the water outlet end of the filter element is connected with the lower cabin body, and the drain port is opened on the lower cabin body.

[0023] By adopting the above technical scheme, the vertical tank body is divided into an upper cabin body and a lower cabin body. When the vertical tank body is used to separate oil and water, the oil-water mixture first enters the upper cabin body, and the oil stains and waste residues in the oil and water are isolated outside the filter element, while the waste water in the oil and water enters the inner cavity of the filter element through the filter element mesh, then flows downward into the lower cabin body, and is then discharged through the drain port.

[0024] Preferably, a floating block is provided in the upper cabin body, and bristles are fixedly connected to the floating block, and the bristles abut against the outer peripheral surface of the filter element.

[0025] By adopting the above technical scheme, the floating block can move up and down with the liquid level of the oil-water mixture in the upper cabin of the vertical tank body, driving the bristles to move up and down on the outer surface of the filter element, brushing off the oil droplets and waste residues clogging the filter element mesh, reducing the possibility of filter element clogging, and facilitating the smooth entry of wastewater into the inner cavity of the filter element to achieve oil-water separation.

[0026] Preferably, the bristles are arranged along the circumferential outer surface of the filter element.

[0027] By adopting the above technical solution, the bristles are distributed on the circumferential outer surface of the filter element, thereby expanding the cleaning area of ​​the filter element and improving the dredging effect of the filter element, thereby ensuring that the wastewater in the oil-water mixture outside the filter element can smoothly enter the inner cavity of the filter element.

[0028] Preferably, a guide member is fixedly provided in the upper cabin body, and the guide member is slidably matched with the floating block.

[0029] By adopting the above technical solution, the fixed guide member is used to slide with the floating block to fix the lifting and lowering direction of the floating block, preventing the horizontal position of the floating block from shifting during the lifting process, thereby ensuring the cleaning effect of the filter element.

[0030] Preferably, it also includes a two-way water supply device, which is used to control the flow direction of wastewater between the inner cavity of the filter element and the drain outlet.

[0031] By adopting the above technical scheme, when using a vertical tank to separate wastewater, oil and residue, the filter element can be unblocked through a two-way water supply device, and the oil-water separation efficiency can be improved. When the mesh on the surface of the filter element is blocked by oil droplets and waste residue, making it difficult for the wastewater in the upper cabin to smoothly enter the inner cavity of the filter element, the two-way water supply device extracts the discharged wastewater and transports it to the lower cabin through the drain port, and makes the wastewater flow to the inner cavity of the filter element, driving the oil and water level in the upper cabin to rise, prompting the floating block to move upward while the bristles sweep away the impurities on the surface of the filter element, so that the inside and outside of the filter element are unblocked; after the impurities are separated from the filter element, the two-way water supply device extracts the wastewater in the lower cabin through the drain port and discharges it to the outside, so that the oil and water outside the filter element flow toward the filter element, and after isolation and filtration, the wastewater in the oil and water enters the inner side of the filter element, and flows to the outside through the lower cabin, the drain port and the two-way water supply device in turn. The two-way water supply device continuously discharges the wastewater, so that the vertical tank body improves the oil-water separation efficiency with the help of external force. When the surface of the filter element is blocked again, the two-way water supply device controls the wastewater to flow from the drain port to the inner cavity of the filter element, thereby achieving dredging.

[0032] The bidirectional water delivery device comprises a bidirectional water pump, one end of which is connected to the drain port.

[0033] By adopting the above technical solution, a two-way water pump is connected to the drain outlet and the wastewater collection device, and the flow direction of wastewater between the drain outlet and the wastewater collection device is controlled by the two-way water pump, thereby controlling the flow direction of wastewater between the inner cavity of the filter element and the drain outlet, thereby achieving dredging of the filter element and improving the oil-water separation efficiency.

[0034] Preferably, the bidirectional water delivery device comprises a water pump and a drainage pipe, the water outlet end of the water pump and the water inlet end of the drainage pipe are both connected to the drainage port, and a valve is provided in the drainage pipe.

[0035] By adopting the above technical scheme, the drainage end of the drainage pipe and the water inlet end of the water pump are connected to the wastewater collection device. When draining water, the valve in the drainage pipe is opened and the water pump is closed, so that the wastewater entering the inner cavity of the filter element can smoothly pass through the lower cabin and the drainage port, and be discharged into the collection device from the drainage pipe. When the filter element is blocked, the valve is closed and the water pump is turned on. The water pump draws out the wastewater and inputs the wastewater into the lower cabin through the drainage port, so that the wastewater in the upper cabin flows upward, and then into the inner cavity of the filter element, and drives the floating block and the bristles to move upward to remove impurities blocked on the mesh of the filter element.

[0036] In summary, compared with the prior art, the oil-water separator for treating emulsified oil of the present invention can gather and grow most of the oil droplets for removal through the gradient structure demulsifying filler in the horizontal tank body that is not clogged by impurities, and the remaining small amount of oil droplets and impurities are isolated and blocked by the filter element in the vertical tank body, so that the oily wastewater with a large amount of impurities can be treated with high precision by first removing the oil and then removing the slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0038] Figure 2 is a cross-sectional view of a horizontal tank body according to embodiment 1 of the present invention;

[0039] Figure 3 is a cross-sectional view of a vertical tank body according to embodiment 1 of the present invention;

[0040] Figure 4 is a partial cross-sectional view of a vertical tank body according to Embodiment 2 of the present invention;

[0041] Figure 5 is a top view of the connection structure between the filter element and the floating block of Example 2 of the present invention;

[0042] Figure 6 is a cross-sectional view of the lower part of the vertical tank body of Example 3 of the present invention;

[0043] Figure 7 is a cross-sectional view of the lower part of the vertical tank body of Example 4 of the present invention;

[0044] In the figure: 1. Horizontal tank, 1-1. Input end, 1-2. Discharge end, 2. Demulsifier filler, 3. Baffle, 3-1. Mesh, 4. Horizontal tank oil bag, 4a. Upper oil bag, 4a-1. Light oil discharge port, 4b. Lower oil bag, 4b-1. Heavy oil discharge port, 5. Vertical tank body, 5a. Upper cabin body, 5b. Lower cabin body, 5-1. Heavy oil discharge port, 5-2. Drain port, 5-3. Light oil discharge port, 6. Filter element, 7. Float, 7-1. Through hole, 8. Brush, 9. Guide, 10. Two-way water delivery device, 10a. Two-way water pump, 10b. Suction pump, 10c. Drain pipe, 10d. Valve, 11. Vertical tank body oil bag, 12. Pressure gauge, 13. Partition, 14. Bracket, 15. Limiter, 16. Conduit, 17. Oil inlet pipe, 18. Water cap. DETAILED DESCRIPTION

[0045] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0046] Example 1

[0047] like Figure 1-Figure 3 As shown, the oil-water separator for treating emulsified oil in Example 1 includes a horizontal tank body 1 fixedly supported by a bracket 14, the input end 1-1 of the horizontal tank body 1 is connected to an oil inlet pipe 17, a baffle 3 with a mesh 3-1 and a demulsifying filler 2 are sequentially arranged in the horizontal tank body 1 along the oil-water flow direction, and the outer edge of the baffle 3 is fixedly connected to the inner wall of the horizontal tank body 1; it also includes a horizontal tank body oil bag 4, the horizontal tank body oil bag 4 includes an upper oil bag 4a connected to the upper part of the horizontal tank body 1 and a lower oil bag 4b connected to the lower part of the horizontal tank body 1, a light oil discharge port 4-1 is opened on the upper oil bag 4a, and a heavy oil discharge port 4b-1 is opened on the lower oil bag 4b, and the upper oil bag 4 and the lower oil bag 4b are both arranged between the discharge end 1-2 of the horizontal tank body 1 and the demulsifying filler 2; the upper part of the horizontal tank body 1 near the input end 1-1 and the discharge end 1-2 A pressure gauge 12 is provided to detect the water pressure in the horizontal tank body 1; the discharge end 1-2 of the horizontal tank body 1 is connected to the vertical tank body 5 through a conduit 16, and a partition 13 is horizontally arranged in the vertical tank body 5, the partition 13 divides the vertical tank body 5 into an upper cabin body 5a and a lower cabin body 5b, and four water caps 18 are installed on the partition 13, and a filter element 6 is fixedly installed on the top of the water cap 18. The filter element 6 is a vertically arranged long strip, and the inner cavity of the filter element 6 is connected with the lower cabin body 5b through the water cap 18, and the bottom of the filter element 6 is the water outlet; the vertical tank body 5 is connected with a vertical tank body oil bag 11 and a drain port 5-2, wherein the vertical tank body oil bag 11 includes a light oil discharge port 5-3 opened at the top of the upper cabin body 5a and a heavy oil discharge port 5-1 opened at the bottom of the side wall of the upper cabin body 5a, and the drain port 5-2 is opened at the bottom of the lower cabin body 5b.

[0048] When the oil-water separator of this embodiment is in operation, the industrial oil-water mixture enters the horizontal tank body 1 through the oil inlet pipe 17. After encountering the baffle 3 with the mesh 3-1, the water flow is blocked and slowed down, so that the oil particles in the oil and water have a long time to float up. After passing through the mesh 3-1, the oil and water are fully in contact with the demulsifying filler 2. The demulsifying filler 2 has extremely strong oleophilicity and hydrophobicity, so that the oil droplets in the oil-water mixture are adsorbed on the surface of the demulsifying filler 2, and the wastewater passes through the demulsifying filler 2 and enters the upper cabin 5a of the vertical tank body 5 through the conduit 16.

[0049] As the number of oil droplets adsorbed by the demulsifying filler 2 increases, the small oil droplets gather together and grow in size, and then detach from the surface of the demulsifying filler 2. According to the density of the oil droplets, the light oil floats to the upper oil bag 4a, and the heavy oil sinks to the lower oil bag 4b. The pressure gauges 12 at both ends of the horizontal tank body 1 are used to detect the water pressure at both ends of the horizontal tank body 1. When the water pressure reaches the set value, the light oil discharge port 4-1 and the heavy oil discharge port 4b-1 are opened to discharge the light oil at the top and the heavy oil at the bottom of the mixed liquid. In this way, most of the demulsified oil and a small amount of dispersed oil in the oil-water are initially separated.

[0050] After the preliminary separation, the oil and water enter the upper cabin 5a through the conduit 19. A long closed-loop columnar filter element 6 is set on the water cap 18 in the upper cabin 5a. When the oil and water enter the inner cavity of the filter element 6 from the outside of the filter element 6, the impurities and the remaining tiny oil droplets in the oil and water are blocked outside the filter element 6, and the wastewater enters the lower cabin 5b through the filter element 6, and then is discharged from the drain port 5-2. The impurities blocked on the outer surface of the filter element 6 float or sink under the wrapping of the oil droplets. After accumulating to a certain extent, the light oil discharge port 5-3 is opened to discharge the light oil and impurities with low density, and the heavy oil discharge port 5-1 is opened to discharge the heavy oil and impurities with high density. In this way, the overall filtration is completed, and finally clean water is obtained after oil and impurity removal. In this embodiment, most of the oil droplets in the oil and water can be filtered through the demulsifying filler 3 in the horizontal tank body 1, so that a large amount of wastewater, solid impurities and a small amount of oil in the oil-water mixture enter the upper cabin body 5a, reducing the possibility of clogging of the rear filter element 6, and using the hydrophilic and oleophobic filter element 6 to block the oil droplets and waste residue outside, thereby facilitating the wastewater to enter the inner cavity of the filter element 6 and be discharged through the lower cabin body 5c and the drain port 5-2, and high-precision processing is achieved by removing oil first and then removing residue.

[0051] The filter element 6 adopts the above-mentioned long closed-loop structure, which increases the surface area of ​​the filter element 6, thereby improving the filtering efficiency and reducing the possibility of clogging of the filter element 6. Four filter elements 6 are provided, which further increases the contact area between the oil and water and the filter element 6, and improves the filtering efficiency. It should be noted that the filter element 6 can also be other numbers, as long as the filter element 6 is in a closed-loop shape, so that after the oil and water pass through the filter element 6, the impurities can be blocked and isolated outside the filter element 6, and the filtered wastewater enters the inside of the filter element 6 and is discharged from the drain port 5-2.

[0052] Example 2

[0053] like Figure 4 and Figure 5 As shown, the oil-water separator for treating emulsified oil in Example 2 is based on Example 1, with the difference that a floating block 7 is provided in the upper cabin body 5a, and the floating block 7 is provided with through holes 7-1 of the same number as the number of filter elements 6, and each filter element 6 is located one by one on the inner side of the through hole 7-1; bristles 8 are fixedly provided in the through hole 7-1, and the bristles 8 abut against the filter element 6 along the circumferential surface of the filter element 6; a guide member 9 is also provided in the upper cabin body 5a, and the guide member 9 is a vertically arranged sliding rod, and its cross section is a regular octagon, and the bottom of the guide member 9 is fixedly connected to the partition 13 and passes through the floating block 7 to slide with the floating block 7, and a convex disc-shaped limiting member 15 is fixed on the top.

[0054] In this embodiment, as the oil and water enter the upper cabin 5a, the float 7 moves up and down with the change of the liquid level of the oil and water, driving the bristles 8 to move up and down while sweeping away the impurities attached to the surface of the filter element 6, thereby preventing the impurities from clogging the mesh on the filter element 6 and causing blockage. The regular octagonal prism-shaped slide bar is used as the guide member 9 to make the float 7 move up and down smoothly, and the limit member 15 is used to prevent the float 7 from detaching from the guide member 9. The guide member 7 can also be of other shapes and distribution positions, such as a vertically arranged slide rail distributed on the side wall of the upper cabin 5a, which can also fix the lifting direction of the float 7, or the guide member 7 is two or more slide bars fixed in the upper cabin 51 and slidingly cooperates with the float 7.

[0055] Example 3

[0056] like Figure 6 As shown, the oil-water separator for treating emulsified oil in Example 3 is based on Example 2, with the difference that a two-way water supply device 10 is provided on one side of the vertical tank body 5, and the two-way water supply device 10 is a two-way water pump 10a, one end of the two-way water pump a is connected to the drain outlet 5-2, and the other end is connected to a wastewater collection device (not shown in the figure) discharged from the drain outlet.

[0057] When the vertical tank is used to block and filter waste residue and oil, the two-way water pump 10a is continuously operated to discharge the wastewater in the lower cabin 5b through the drain port 5-2, so that the oil-water mixture in the upper cabin 5a flows close to the filter element 6, promoting the wastewater in the oil-water mixture to enter the inner cavity of the filter element 6, and then discharged through the lower cabin 5b and the drain port 5-2, and the discharged wastewater flows into the wastewater collection device. In this way, the two-way water pump 10a is used to force the wastewater to flow, thereby improving the oil-water separation efficiency.

[0058] As the separation proceeds, the waste residue and oil accumulated on the surface of the filter element 6 gradually increase, which can easily cause the mesh of the filter element 6 to be blocked, affecting the oil-water filtration, and also increasing the power consumption of the two-way water pump 10a. At this time, the two-way water pump 10a extracts the wastewater in the wastewater collection device and transports it to the lower cabin 5b through the drain port 5-2, so that the wastewater in the lower cabin 5b flows upward into the inner cavity of the filter element 6, thereby raising the oil-water level in the upper cabin 5a, driving the floating block 7 to move upward, and the bristles 8 rise at the same time, and brush away the impurities such as oil and waste residue that are blocked on the surface of the filter element 6, thereby unblocking the filter element 6; after the impurities leave the outer surface of the filter element 6, the two-way water pump 10a resumes the previous working mode, that is, discharges the wastewater in the lower cabin 5b to the wastewater collection device through the drain port 5-2.

[0059] In this embodiment, the flow direction of wastewater between the inner cavity of the filter element 6 and the drain outlet 5-2 is controlled by the two-way water pump 10a, which can not only force the wastewater to flow and improve the oil-water separation efficiency, but also clean up the impurities on the surface of the filter element 6, so that the inside and outside of the filter element 6 are unblocked, and prevent the two-way water pump 10a from consuming too much power when the filter element 6 is blocked.

[0060] Example 4

[0061] like Figure 7 As shown, the oil-water separator for treating emulsified oil in Example 4 is based on Example 3, with the difference that the two-way water delivery device 10 includes a water pump 10b and a drain pipe 10c, the water outlet end of the water pump 10b and the water inlet end of the drain pipe 10c are both connected to the drain port 5-2, the water inlet end of the water pump 10b and the water outlet end of the drain pipe 10c are both connected to a wastewater collection device (not shown in the figure), and a valve 10d is provided in the drain pipe 10c.

[0062] In this embodiment, at the initial stage of the operation of the equipment, the pump 10b is closed and the valve 10d is opened. After the wastewater in the upper cabin 5a enters the inner cavity of the filter element 6, it flows downward into the lower cabin 5b by its own gravity, enters the drain pipe 10c through the drain port 5-2, and finally is discharged from the drain pipe 10c and flows into the wastewater collection device; when too many impurities are accumulated on the surface of the filter element 6, causing the mesh of the filter element 6 to be blocked, the valve 10d is closed, the pump 10c is started, and the wastewater collected by the wastewater collection device is extracted. The wastewater is transported to the lower cabin 5b through the drain port 5-2, so that the wastewater in the lower cabin 5b enters the inner cavity of the filter element 6, and the liquid level in the upper cabin 5a rises. While the floating block 7 drives the bristles 8 to move upward, the bristles 8 clean the impurities on the surface of the filter element 6, so that the filter element is unblocked; then the valve 10d is opened and the water pump 10b is closed, so that the wastewater in the oil-water mixture in the upper cabin 5a can enter the cleaned inner cavity of the filter element 6, and be discharged through the lower cabin 5b, the drain port 5-2 and the drain pipe 10c in turn.

[0063] The above is only 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 technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An oil-water separator for treating emulsified oil, comprising a horizontal tank body (1), wherein a demulsifying filler (2) is arranged in the horizontal tank body (1), and the horizontal tank body (1) is connected to a horizontal tank body oil bag (4), characterized in that: The discharge end (1-2) of the horizontal tank body (1) is connected to the vertical tank body (5), and the vertical tank body (5) is connected to the vertical tank body oil bag (11) and the drain port (5-2); a filter element (6) is arranged in the vertical tank body (5), and the inner cavity of the filter element (6) is connected to the drain port (5-2); The vertical tank body oil bag (11) comprises an oil re-discharge port (5-1) opened on the side wall of the vertical tank body (5); The vertical tank body (5) comprises an upper tank body (5a) and a lower tank body (5b) which are arranged in isolation, the filter element (6) is arranged in the upper tank body (5a), the oil re-drainage port (5-1) is opened at the bottom of the upper tank body (5a), the upper tank body (5a) is connected to the discharge end (1-2) of the horizontal tank body (1), the water outlet end of the filter element (6) is connected to the lower tank body (5b), and the water outlet (5-2) is opened on the lower tank body (5b); A floating block (7) is arranged in the upper cabin (5a), and bristles (8) are fixedly connected to the floating block (7), and the bristles (8) abut against the outer peripheral surface of the filter element (6); The bristles (8) are arranged along the circumferential outer surface of the filter element (6); A guide member (9) is fixedly provided in the upper cabin body (5a), and the guide member (9) is slidably matched with the floating block (7); It also comprises a two-way water delivery device (10), wherein the two-way water delivery device (10) is used to control the flow direction of wastewater between the inner cavity of the filter element (6) and the drain port (5-2).

2. The oil-water separator for treating emulsified oil according to claim 1, characterized in that: The horizontal tank body oil bag (4) comprises an upper oil bag (4a) connected to the upper part of the horizontal tank body (1); the upper oil bag (4a) is arranged between the discharge end (1-2) of the horizontal tank body (1) and the demulsifying filler (2); and a light oil discharge port (4a-1) is provided on the upper oil bag (4a).

3. The oil-water separator for treating emulsified oil according to claim 2, characterized in that: The horizontal tank body oil bag (4) further comprises a lower oil bag (4b) connected to the bottom of the horizontal tank body (1); the lower oil bag (4b) is arranged between the discharge end (1-2) of the horizontal tank body (1) and the demulsifying filler (2); and a heavy oil discharge port (4b-1) is provided on the lower oil bag (4b).

4. The oil-water separator for treating emulsified oil according to claim 1, characterized in that: A baffle (3) with mesh holes (3-1) is also arranged in the horizontal tank body (1), and the outer edge of the baffle (3) is fixedly connected to the inner wall of the horizontal tank body (1); the baffle (3) and the demulsifying filler (2) are arranged in sequence along the flow direction of oil and water.

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