Novel efficient acidic water multi-stage oil removal device

Abstract

The invention provides a novel efficient acid water multi-stage oil removal device, which relates to the technical field of acid water multi-stage oil removal, and comprises an oil removal tank, a feed pipe, an oil-water separation assembly, a flocculation flow barrel, a runner pipe, a filter element oil filter assembly, a baffling oil filter assembly, a coalescence oil filter assembly, a steam cleaning assembly, a blow-off pipe and a dual oil discharge assembly, according to the device, oil stains and grease contained in the acid wastewater can be subjected to multiple effective filtration before the acid wastewater is introduced into the steam stripping device, so that adverse effects of the oil stains and the grease on steam stripping are avoided, the oil stains in the acid wastewater are sequentially subjected to primary coalescence, secondary baffling coalescence and triple filter element blocking, and the oil stains are prevented from being doped in the acid wastewater; the subsequent steam removal effect on ammonia nitrogen and sulfide in the acid wastewater is improved, so that the treatment effect on the acid wastewater in the refining process is better.

Description

Technical Field

[0001] The present invention relates to the technical field of acidic water multi-stage oil removal, in particular to a novel high-efficiency acidic water multi-stage oil removal device. Background Art

[0002] At present, refining enterprises produce a lot of acidic wastewater in the process of refining crude oil into gasoline, kerosene or diesel. The acidic wastewater contains a lot of ammonia nitrogen and sulfides. Steam stripping is currently used to remove the ammonia nitrogen and sulfides produced in the acidic wastewater. However, at the same time, the acidic wastewater also contains a lot of oil or grease. Directly passing the acidic wastewater with these oil or grease into the steam stripping for treatment will affect the use effect of the steam stripping, and the steam stripping will need to be frequently maintained later. In summary, there is currently a lack of multiple designs that effectively remove oil and grease from acidic wastewater. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems raised in the above background technology, and then proposes a new type of high-efficiency acidic water multi-stage oil removal device.

[0004] The technical solution adopted by the present invention to solve the technical problem is: A new type of high-efficiency acidic water multi-stage oil removal device, including an oil removal tank, a feed pipe, an oil-water separation component, a flocculant barrel, a flow pipe, a filter element oil filter component, a baffle oil filter component, a coalescing oil filter component, a steam cleaning component, a drain pipe and a double oil discharge component; The end of the feed pipe is connected to the oil-water separation component fixed on the top of the oil removal tank, and the end of the feed pipe away from the oil-water separation component is connected to the booster pump; The oil-water separation assembly, flocculent barrel, flow pipe, filter element oil filter assembly, baffle oil filter assembly and coalescing oil filter assembly are installed and arranged in the oil removal tank from top to bottom; The oil-water separation component is connected to the flocculation barrel, the flocculation barrel is connected to the flow pipe, and the flow pipe passes through the filter element oil filter component, the baffle oil filter component and the coalescing oil filter component in sequence and extends to the bottom area of the oil removal tank; The steam cleaning assembly cleans the oil stains attached to the baffle filter assembly and the coalescing filter assembly successively or simultaneously. The filter element filter assembly can be disassembled and replaced from the outside of the oil removal tank. The sewage pipe is arranged at the bottom of the oil removal tank and a valve is provided on the sewage pipe; The double oil discharge assembly is arranged on the top of the deoiling tank to independently remove the high-density oil core overflowing from the oil-water separation assembly and the oil accumulated in the top area of the deoiling tank after a long period of deoiling.

[0005] Furthermore, the oil-water separation assembly includes a delivery pipe, a liquid inlet channel, a cyclone separation pipe, an overflow pipe, a reducing pipe and a liquid outlet pipe. A delivery pipe with both ends blocked is fixedly installed at the top of the deoiling tank, and the upper area of the delivery pipe is connected to the feed pipe. A plurality of rectangular liquid outlet holes are arranged around the bottom area of the delivery pipe, and the liquid outlet holes are connected to the liquid inlet channel, and the two are distributed one-to-one. The liquid inlet channel is connected to the interior of the cyclone separation tube; The overflow pipe is fixed on the top of the cyclone separation pipe and is connected with the interior of the cyclone separation pipe; The cyclone separation pipe, the reducing pipe and the liquid outlet pipe are connected in sequence; The end of the liquid outlet pipe is connected to the flocculation barrel.

[0006] Furthermore, the filter element oil filter assembly includes a cylinder, an inspection port, a filter element, a filter element tube, a leakage hole, a screw, a limit plate, a first mounting plate, a second mounting plate, a strip steel, a pipe, a first mounting hole, a second mounting hole, a nut and a plurality of clamps. The inspection ports are symmetrically opened on the oil removal tank; The hollow annular shell is fixed in the degreasing tank and the middle of the shell allows the flow pipe to pass through. The shell is symmetrically fixed with filter tubes, and the interior of the shell is connected to the filter tubes. The shell is also provided with a water outlet pipe connected to the interior. The end of the water outlet pipe passes through the degreasing tank and is connected to the outside world. There are several leakage holes on the circumference of the filter element tube, and the filter element tube is directly opposite the inspection port to facilitate the replacement of the filter element from the outside; The screw is fixed on the outer end of the filter tube, and a limit plate is fixed on the filter tube; A plurality of strip steels are fixedly arranged around the first mounting plate and the second mounting plate, and the axial position of the second mounting plate is limited by a limiting plate; Several pipes are fixed on the inner wall of the steel strip and distributed at intervals; The first mounting hole is formed on the first mounting plate, and the first mounting hole is matched with the screw rod; The second mounting hole is opened on the second mounting plate, and the second mounting hole and the inner wall of the pipeline are both in contact with the filter tube; The nut is threadedly connected to the screw; A filter sleeve covering all the leakage holes is arranged on the filter tube and is locked by a plurality of clamps.

[0007] Furthermore, the baffle oil filter assembly includes a baffle cover frame, a second coalescing filler, a baffle bottom frame and a first fixed channel steel. Two sets of first fixed channel steels are symmetrically fixed on the inner wall of the oil removal tank and are distributed up and down; The baffle bottom frame is connected to the first fixed channel steel at the bottom, and a lower baffle hole is opened in the middle of the baffle bottom frame to allow the flow pipe to pass through. The diameter of the lower baffle hole is larger than the diameter of the flow pipe. The baffle bottom frame is completely blocked except for the lower baffle hole. The baffle cover frame is connected to the first fixed channel steel at the top, and a second through hole is opened in the middle of the baffle cover frame to allow the flow pipe to pass through. The diameter of the second through hole is equal to the diameter of the flow pipe. An upper baffle hole is opened on the circumference of the outer edge of the baffle cover frame. Except for the second through hole and the upper baffle hole, the rest of the baffle cover frame is completely blocked. The second coalescing filler is arranged between the deflection cover frame and the deflection bottom frame and contacts the blocking areas of the two.

[0008] Furthermore, the coalescing oil filter assembly includes a coalescing cover plate frame, a first coalescing filler, a coalescing bottom frame and a second fixed channel steel; The coalescing cover frame and the coalescing bottom frame are both connected to the second fixed channel steel and are distributed up and down; The coalescing cover frame and the coalescing bottom frame are both made of porous plates, and a third through hole is opened in the center of each of them to allow the flow pipe to pass through and is in the same vertical direction. The diameter of the third through hole is equal to the diameter of the flow pipe. The first coalescing filler is located between the coalescing cover plate frame and the coalescing bottom frame.

[0009] Furthermore, the steam cleaning assembly includes a first cleaning pipe, a second cleaning pipe, a tee pipe, a support seat and a steam boiler. The first cleaning pipe is spirally arranged along the bottom surface of the coalescing bottom frame and is provided with a plurality of first nozzles facing vertically upwards; The second cleaning pipe adopts a special-shaped pipe, and the end of the second cleaning pipe extends through the lower deflection hole to the area between the deflection cover frame and the deflection bottom frame. A support seat for supporting the second cleaning pipe is fixed on the circulation pipe. The second cleaning pipe is coiled around the periphery of the circulation pipe and does not contact the circulation pipe. The second cleaning pipe is provided with a plurality of second nozzles facing the second agglomerated fillers on both sides. The initial ends of the first cleaning pipe and the second cleaning pipe extend to the outside of the oil removal tank and are connected to the steam pipeline through a tee pipe, and the steam pipeline is connected to the steam boiler.

[0010] Furthermore, the second cleaning pipe is provided with an extension pipe connected to the interior thereof and arranged along the height direction, and the extension pipe is provided with a plurality of third nozzles facing different height areas of the second coalescing fillers on both sides to expand the steam cleaning range of the second coalescing fillers.

[0011] Furthermore, a mounting plate is fixed in the oil removal tank, on which a flocculent barrel and a coil bracket are fixed. The coil bracket is provided with a heating coil that fits the outer wall of the cyclone separation tube, the reducer and the liquid outlet pipe, and steam flows in the heating coil.

[0012] Furthermore, the double oil discharge assembly includes a first oil outlet, an oil discharge chamber, a second oil outlet, an oil-water interface meter, a low-pressure storage container, a siphon tube and a solenoid valve. The top of the oil removal tank is provided with a first oil outlet, a second oil outlet and an oil-water interface meter. The first oil outlet is connected to the oil discharge chamber at the top of the oil removal tank, and the oil discharge chamber is connected to several overflow pipes. The probe of the oil-water interface meter extends into the interior of the oil removal tank. The second oil outlet and the low-pressure storage container are connected through a siphon tube, and a solenoid valve is provided on the siphon tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present application can effectively filter out the oil and grease contained in the acidic wastewater before it is introduced into the stripping process, thereby preventing the oil and grease from having an adverse effect on the stripping process. The oil in the acidic wastewater is successively subjected to a single-layer agglomeration, a double-layer deflection agglomeration, and a triple-layer filter element barrier to prevent the oil from being mixed in the acidic wastewater, thereby improving the subsequent steam removal effect of ammonia nitrogen and sulfide in the acidic wastewater, and thus achieving a better treatment effect on the acidic wastewater in the refining process; (2) The filter element and oil filter assembly in this application can be disassembled and replaced at the reserved inspection port on the outside of the oil removal tank, without having to enter the oil removal tank through the manhole. The convenience and safety of the filter element replacement process are significantly improved; the acidic wastewater after passing through the filter element can flow out from an independent channel and then be transported to the stripping process; (3) The present application can automatically and effectively steam clean the coalescing oil filter assembly and the deflector filter assembly through the steam cleaning assembly. At the same time, the high-density oil core overflowing from the oil-water separation assembly and the oil accumulated in the top area of the oil removal tank after long-term oil removal can be effectively discharged through the double oil discharge assembly, further significantly reducing the labor intensity of manual cleaning, that is, while removing the oil in the acidic wastewater, the oil remaining attached to the inside of the oil removal tank can be effectively cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of oil-water separation components; Figure 3 It is a schematic diagram of the structure of the filter element oil filter assembly; Figure 4 This is a schematic diagram of pipeline installation; Figure 5 This is a schematic diagram of the installation coordination of strip steel and pipeline; Figure 6 Schematic diagram of the upper deflection hole; Figure 7 A schematic diagram of the lower deflection hole; Figure 8 for Figure 1 A partial enlarged view of the part marked A; Figure 9 for Figure 1 A partial enlarged view of the part marked B; Reference numerals: 1. De-oiling tank; 2. Feed pipe; 3. Oil-water separation assembly; 31. Delivery pipe; 32. Liquid inlet channel; 33. Cyclone separation pipe; 34. Overflow pipe; 35. Reducer; 36. Liquid outlet pipe; 4. Flocculation barrel; 5. Flow pipe; 6. Filter element and oil filter assembly; 61. Cylinder; 62. Inspection port; 63. Filter element; 64. Filter element tube; 601. Leakage hole; 602. Screw; 603. Limit plate; 604. First mounting plate; 605. Second mounting plate; 606. Strip steel; 607. Pipeline; 608. First mounting hole; 609. Second mounting hole; 610. Nut; 611. Clamp ;7. Baffle oil filter assembly;71. Baffle cover frame;711. Upper baffle hole;712. Second through hole;72. Second coalescing filler;73. Baffle bottom frame;731. Lower baffle hole;74. First fixed channel steel;8. Coalescing oil filter assembly;81. Coalescing cover frame;82. First coalescing filler;83. Coalescing bottom frame;84. Second fixed channel steel;9. Steam cleaning assembly;91. First cleaning pipe;92. Second cleaning pipe;10. Drain pipe;11. Mounting plate;12. Coil bracket;13. First oil outlet;14. Oil drain chamber;15. Second oil outlet;16. Oil-water interface meter. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The present invention is further described in conjunction with the drawings and embodiments: like Figures 1 to 9 As shown, a new type of high-efficiency acidic water multi-stage oil removal device includes an oil removal tank 1, a feed pipe 2, an oil-water separation component 3, a flocculent barrel 4, a flow pipe 5, a filter element oil filter component 6, a baffle oil filter component 7, a coalescing oil filter component 8, a steam cleaning component 9, a drain pipe 10 and a double oil discharge component; The end of the feed pipe 2 is connected to the oil-water separation component 3 fixed on the top of the oil removal tank 1, and the end of the feed pipe 2 away from the oil-water separation component 3 is connected to the booster pump; The oil-water separation component 3, the flocculent barrel 4, the flow pipe 5, the filter element oil filter component 6, the baffle oil filter component 7 and the coalescing oil filter component 8 are installed and arranged in order from top to bottom in the oil removal tank 1; The oil-water separation component 3 is connected to the flocculation barrel 4, the flocculation barrel 4 is connected to the flow pipe 5, and the flow pipe 5 passes through the filter element oil filter component 6, the baffle oil filter component 7 and the coalescing oil filter component 8 in sequence and extends to the bottom area of the oil removal tank 1; The steam cleaning component 9 cleans the oil stains attached to the baffle oil filter component 7 and the coalescing oil filter component 8 successively or simultaneously. The filter element oil filter component 6 can be disassembled and replaced from the outside of the oil removal tank 1; The sewage pipe 10 is arranged at the bottom of the oil removal tank 1 and a valve is provided on the sewage pipe 10; The double oil discharge assembly is arranged on the top of the deoiling tank 1 to independently remove the high-density oil core overflowing from the oil-water separation assembly 3 and the oil accumulated in the top area of the deoiling tank after a long period of deoiling.

[0016] Further refinement of the embodiment of the present invention is as follows: Figure 1 and Figure 2 As shown, the oil-water separation assembly 3 includes a delivery pipe 31, a liquid inlet channel 32, a cyclone separation pipe 33, an overflow pipe 34, a reducing pipe 35 and a liquid outlet pipe 36. A delivery pipe 31 with both ends blocked is fixedly installed at the top of the de-oiling tank 1. The upper area of the delivery pipe 31 is connected to the feed pipe 2. The bottom area of the delivery pipe 31 is circumferentially provided with a plurality of rectangular liquid outlet holes, which are connected to the liquid inlet channel 32 and the two are distributed one-to-one. The liquid inlet channel 32 is connected to the interior of the cyclone separation tube 33; The overflow pipe 34 is fixed on the top of the cyclone separation pipe 33 and is connected to the inside of the cyclone separation pipe 33; The cyclone separation pipe 33, the reducing pipe 35 and the liquid outlet pipe 36 are connected in sequence; The end of the liquid outlet pipe 36 is connected to the flocculation barrel 4.

[0017] Further refinement of the embodiment of the present invention is as follows: Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the filter element oil filter assembly 6 includes a cylinder 61, an inspection port 62, a filter element 63, a filter element tube 64, a leakage hole 601, a screw 602, a limit plate 603, a first mounting plate 604, a second mounting plate 605, a steel strip 606, a pipe 607, a first mounting hole 608, a second mounting hole 609, a nut 610 and a plurality of clamps 611. The inspection port 62 is symmetrically opened on the oil removal tank 1; A hollow annular housing 61 is fixedly mounted within the de-oiling tank 1, and the flow pipe 5 is allowed to pass through the middle of the housing 61. Filter tubes 64 are symmetrically fixed to the housing 61, and the interior of the housing 61 is connected to the filter tubes 64. The housing 61 is also provided with a water outlet pipe connected to the interior thereof. The end of the water outlet pipe passes through the de-oiling tank 1 and is connected to the outside world. The water outlet pipe is not shown in the figure. The filter element tube 64 is provided with a plurality of leakage holes 601 on its circumference and the filter element tube 64 is arranged opposite to the inspection port 62 to facilitate the replacement of the filter element 63 from the outside. The screw 602 is fixed to the outer end of the filter tube 64, and a limit plate 603 is fixed to the filter tube 64; A plurality of steel strips 606 are fixedly arranged around the first mounting plate 604 and the second mounting plate 605, and the axial position of the second mounting plate 605 is limited by the limiting plate 603; A plurality of pipes 607 are fixed on the inner wall of the steel strip 606 and are spaced apart; The first mounting hole 608 is formed on the first mounting plate 604 and is matched with the screw rod 602; The second mounting hole 609 is formed on the second mounting plate 605 , and the second mounting hole 609 and the inner wall of the pipe 607 are in contact with the filter tube 64 ; The nut 610 is threadedly connected to the screw 602; The filter element 63 covering all the leakage holes 601 is sleeved on the filter element tube 64 and locked by a plurality of clamps 611 .

[0018] Further refinement of the embodiment of the present invention is as follows: Figure 1 、 Figure 6 and Figure 8 As shown, the baffle oil filter assembly 7 includes a baffle cover frame 71, a second coalescing filler 82, a baffle bottom frame 73 and a first fixed channel steel 74. Two sets of first fixed channel steels 74 are symmetrically fixed on the inner wall of the oil removal tank 1 and are distributed up and down; The baffle bottom frame 73 is connected to the first fixed channel steel 74 at the bottom, and a lower baffle hole 731 is opened in the middle of the baffle bottom frame 73 to allow the flow pipe 5 to pass through. The diameter of the lower baffle hole 731 is larger than the diameter of the flow pipe 5. The baffle bottom frame 73 is completely blocked except for the lower baffle hole 731. The baffle cover frame 71 is connected to the first fixed channel steel 74 at the top, and a second through hole 712 is opened in the middle of the baffle cover frame 71 to allow the circulation pipe 5 to pass through. The diameter of the second through hole 712 is equal to the diameter of the circulation pipe 5. An upper baffle hole 711 is opened on the outer edge circumference of the baffle cover frame 71. Except for the second through hole 712 and the upper baffle hole 711, the rest of the baffle cover frame 71 is completely blocked. A plurality of second coalescing fillers 82 are neatly stacked and arranged between the deflection cover frame 71 and the deflection bottom frame 73 and are in contact with the blocking areas of the two.

[0019] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, the coalescing oil filter assembly 8 includes a coalescing cover plate frame 81, a first coalescing filler 82, a coalescing bottom frame 83 and a second fixed channel steel 84; The coalescing cover frame 81 and the coalescing bottom frame 83 are both connected to the second fixed channel steel 84 and are distributed up and down; The coalescing cover frame 81 and the coalescing bottom frame 83 are both made of porous plates and are respectively provided with a third through hole (not shown in the figure) in the center thereof for allowing the flow pipe 5 to pass through and in the same vertical direction. The diameter of the third through hole is equal to the diameter of the flow pipe 5. The first coalescing filler 82 is located between the coalescing cover frame 81 and the coalescing bottom frame 83 .

[0020] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, the steam cleaning assembly 9 includes a first cleaning pipe 91, a second cleaning pipe 92, a tee pipe, a support base and a steam boiler (the steam boiler is not shown in the figure). The first cleaning pipe 91 is spirally arranged along the bottom surface of the coalescing bottom frame 83 and is provided with a plurality of first nozzles facing vertically upwards. The second cleaning pipe 92 is a special-shaped pipe, and the end of the second cleaning pipe 92 passes through the lower deflection hole 731 and extends to the area between the deflection cover frame 71 and the deflection bottom frame 73. A support seat (not shown in the figure) for supporting the second cleaning pipe 92 is fixed on the circulation pipe 5. The second cleaning pipe 92 is coiled around the periphery of the circulation pipe 5 and does not contact the circulation pipe 5. A plurality of second nozzles facing the second agglomerated fillers 82 on both sides are opened on the second cleaning pipe 92. The initial ends of the first cleaning pipe 91 and the second cleaning pipe 92 extend to the outside of the oil removal tank 1 and are connected to the steam pipeline through a three-way pipe. The steam pipeline is connected to the steam boiler.

[0021] In order to further improve the steam cleaning effect of the second agglomerate filler, the above embodiment scheme is further optimized. The second cleaning pipe 92 is provided with an extension pipe connected to the interior thereof and arranged along the height direction. The extension pipe is provided with a number of third nozzles facing different height areas of the second agglomerate filler 82 on both sides to expand the steam cleaning range of the second agglomerate filler 82. The extension pipe is not shown in the figure.

[0022] In order to prevent the solidification or decrease in fluidity of oil substances, and to avoid the phenomenon of equipment clogging and reduced separation efficiency; the above embodiment scheme is further optimized, such as Figure 1 As shown, a mounting plate 11 is fixedly provided in the oil removal tank 1, on which a flocculent barrel 4 and a coil bracket 12 are fixedly provided. A heating coil (the heating coil is not numbered in the figure) is provided on the coil bracket 12 and fits the outer walls of the cyclone separation tube 33, the reducer 35 and the liquid outlet pipe 36, and steam flows in the heating coil.

[0023] In order to facilitate the high-density oil core flowing out of the overflow pipe 34 and the oil accumulated in the top area of the oil removal tank 1 can be smoothly discharged from the oil removal tank 1, the above embodiment is further refined, the double oil discharge assembly includes a first oil outlet 13, an oil discharge chamber 14, a second oil outlet 15, an oil-water interface meter 16, a low-pressure storage container, a siphon and a solenoid valve. The top of the oil removal tank 1 is provided with a first oil outlet 13, a second oil outlet 15 and an oil-water interface meter 16. The first oil outlet 13 is connected to the oil discharge chamber 14 at the top of the oil removal tank 1, and the oil discharge chamber 14 is connected to several overflow pipes 34. The probe of the oil-water interface meter 16 extends to the inside of the oil removal tank 1, and the second oil outlet 15 and the low-pressure storage container are connected. The storage containers are connected by a siphon tube, and a solenoid valve is provided on the siphon tube. When the oil-water interface meter 16 detects that the oil amount on the top of the oil removal tank 1 reaches a preset upper limit height, it immediately feeds back a signal to the controller, and the controller then controls the solenoid valve to open. At this time, due to the high air pressure inside the oil removal tank 1 and the low air pressure in the storage container, the oil can automatically flow into the low-pressure storage container through the siphon principle. When the oil-water interface meter 16 detects that the oil on the top of the oil removal tank 1 is drained and the water is about to be discharged, it immediately feeds back a signal to the controller again, and the controller then controls the solenoid valve to close, and the oil discharge can be stopped at this time (the low-pressure storage container, siphon tube and solenoid valve are not shown in the figure).

[0024] Workflow of the present invention: First, acidic water is introduced from the feed pipe 2 by a booster pump. The acidic water then reaches the delivery pipe 31 and is passed through several outlet holes (specifically 7 outlet holes) into multiple cyclone separation tubes 33. Centrifugal force then causes the oil droplets with lower density to gather toward the center, forming a continuous oil core. The oil core is finally discharged into the oil discharge chamber 14 through the overflow pipe 34. The remaining acidic water with low oil content is passed through the outlet pipe 36 into the flocculation barrel 4 for aggregation. The acidic water then moves along the circulation pipe 5 and is discharged to the bottom of the oil removal tank 1. As the material is discharged, the water level will gradually rise. Then, the acidic wastewater with low oil content will first pass through the first coalescing filler 82 to coalesce and increase the particle size of the oil droplets. At the same time, the first coalescing filler 82 can perform the first filtering and adsorption process on the small-sized oil pollutants in the acidic wastewater. Then the water level will continue to rise and the acidic water and the large oil droplets will flow in from the lower deflection hole 731. Since the other areas of the deflection bottom frame 73 except the lower deflection hole 731 are blocked, and the other areas of the deflection cover frame 71 except the second through hole 712 and the upper deflection hole 711 are completely blocked, the running trajectory of the water can be changed (for details, please refer to the attached manual). Figure 8 Indicated by the middle arrow), this can effectively increase the contact area between the acidic water and the second coalescing filler 82, thereby filtering the oil for the second time, while the particle size of the previous oil droplets is further coalesced and increased; After the acidic water and the large oil droplets pass through the first coalescing filler 82 and the second coalescing filler 82 in sequence, they finally reach the oil filter layer of the filter element. At this point, the acidic water can undergo the third filtration process (the large oil droplets cannot pass through the filter element and can be effectively and completely blocked). After the large oil droplets are filtered out, the acidic water enters the filter element tubes 64 through the plurality of leakage holes 601 and then continues to flow along the filter element tubes 64 into the housing 61 (specifically, the housing 61 is connected to four filter element tubes 64 and a water outlet pipe). The filter element oil filter assemblies 6 are symmetrically arranged on the housing 61, with two groups on each side. The acidic water is then discharged from the water outlet pipe to the oil removal tank 1, completing the acidic water oil removal process. It should be noted that during the acidic water deoiling process, the deoiling tank 1 is basically in a full tank state. If the filter element 63 needs to be replaced, the acidic water flow is stopped first. Then, as the triple oil filtering process is carried out, the water level in the deoiling tank 1 will drop. When the water level in the deoiling tank 1 drops below the inspection port 62, the inspection port 62 is opened and the nut 610 is loosened to remove the filter tube 64 and the filter element 63 together. Then, the fixings of the multiple clamps 611 are released in sequence to complete the removal and replacement of the filter element 63. Then, after the filter element is replaced, the filter tube 64 is reinstalled to start a new round of acidic water deoiling process. When the acidic water degreasing is completed and the oil stains attached to the surface of the first agglomerated packing 82 and the second agglomerated packing 82 need to be cleaned, first open the drain pipe 10 to drain the water in the degreasing tank 1, then operate the steam boiler and simultaneously pass steam into the two cleaning pipes, then the steam is ejected from the first nozzle and the second nozzle to make the oil stains attached to the first agglomerated packing 82 and the second agglomerated packing 82 fall off to the bottom of the degreasing tank 1, and use the extension pipe and the third nozzle to make the steam cleaning area of the second agglomerated packing more comprehensive. At this time, the discharge of oil stains and sludge can be completed with the cooperation of manual operation. During the degreasing process, oil, water and sludge are stratified in the degreasing tank 1.

[0025] In summary, the present application can effectively filter out the oil and grease contained in the acidic wastewater before it is introduced into the stripping process, thereby avoiding the adverse effects of oil and grease on the stripping process. The oil in the acidic wastewater is successively subjected to single-layer agglomeration, double-bend agglomeration, and triple-filter element blocking to avoid the mixing of oil and grease in the acidic wastewater, thereby improving the subsequent steam removal effect of ammonia nitrogen and sulfide in the acidic wastewater, and thus achieving better treatment effect for the acidic wastewater in the refining process.

[0026] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of high-efficiency acidic water multi-stage oil removal device, characterized in that: The invention comprises an oil removal tank (1), a feed pipe (2), an oil-water separation component (3), a flocculent barrel (4), a flow pipe (5), a filter element oil filter component (6), a baffle oil filter component (7), a coalescing oil filter component (8), a steam cleaning component (9), a sewage pipe (10) and a double oil discharge component. The end of the feed pipe (2) is connected to the oil-water separation component (3) fixed at the top of the oil removal tank (1), and the end of the feed pipe (2) away from the oil-water separation component (3) is connected to a booster pump; The oil-water separation component (3), the flocculent flow barrel (4), the flow pipe (5), the filter element oil filter component (6), the baffle oil filter component (7) and the coalescing oil filter component (8) are installed and arranged in sequence from top to bottom in the oil removal tank (1); The oil-water separation component (3) is connected to the flocculent flow barrel (4), the flocculent flow barrel (4) is connected to the flow pipe (5), and the flow pipe (5) sequentially passes through the filter element oil filter component (6), the baffle oil filter component (7) and the coalescing oil filter component (8) and extends to the bottom end area of the oil removal tank (1); The steam cleaning component (9) cleans the oil stains attached to the baffle oil filter component (7) and the coalescing oil filter component (8) successively or simultaneously. The filter element oil filter component (6) can be disassembled and replaced from the outside of the oil removal tank (1); A sewage discharge pipe (10) is arranged at the bottom of the oil removal tank (1) and a valve is provided on the sewage discharge pipe (10); The double oil discharge assembly is arranged on the top of the oil removal tank (1) to independently remove the high-density oil core overflowing from the oil-water separation assembly (3) and the oil accumulated in the top area of the oil removal tank after long-term oil removal.

2. A novel high-efficiency acidic water multi-stage oil removal device according to claim 1, characterized in that: The oil-water separation assembly (3) comprises a delivery pipe (31), a liquid inlet channel (32), a cyclone separation pipe (33), an overflow pipe (34), a reducing pipe (35) and a liquid outlet pipe (36). A delivery pipe (31) with both upper and lower ends blocked is fixedly arranged at the top of the inner portion of the de-oiling tank (1), and the upper region of the delivery pipe (31) is connected to the feed pipe (2). A plurality of rectangular liquid outlet holes are arranged around the bottom region of the delivery pipe (31), and the liquid outlet holes are connected to the liquid inlet channel (32), and the two are distributed in a one-to-one correspondence. The liquid inlet channel (32) is connected to the interior of the cyclone separation tube (33); The overflow pipe (34) is fixed on the top of the cyclone separation pipe (33) and is connected to the interior of the cyclone separation pipe (33); The cyclone separation pipe (33), the reducing pipe (35) and the liquid outlet pipe (36) are sequentially connected; The end of the liquid outlet pipe (36) is connected to the flocculation barrel (4).

3. A novel high-efficiency acidic water multi-stage oil removal device according to claim 1, characterized in that: The filter element oil filter assembly (6) comprises a cylinder (61), an inspection port (62), a filter element (63), a filter element tube (64), a liquid leakage hole (601), a screw (602), a limit plate (603), a first mounting plate (604), a second mounting plate (605), a steel strip (606), a pipe (607), a first mounting hole (608), a second mounting hole (609), a nut (610) and a plurality of clamps (611). The inspection port (62) is symmetrically opened on the oil removal tank (1); The hollow annular shell (61) is fixed in the de-oiling tank (1), and the middle of the shell (61) allows the flow pipe (5) to pass through. The shell (61) is symmetrically fixed with a filter tube (64), and the interior of the shell (61) is connected to the filter tube (64). The shell (61) is also provided with a water outlet pipe connected to the interior thereof, and the end of the water outlet pipe passes through the de-oiling tank (1) and is connected to the outside. A plurality of leakage holes (601) are provided on the circumference of the filter core tube (64), and the filter core tube (64) and the inspection port (62) are arranged opposite each other to facilitate the replacement of the filter core (63) from the outside. The screw (602) is fixed on the outer end of the filter tube (64), and a limiting plate (603) is fixed on the filter tube (64); A plurality of steel strips (606) are fixedly arranged circumferentially between the first mounting plate (604) and the second mounting plate (605), and the axial position of the second mounting plate (605) is limited by a limiting plate (603); A plurality of pipes (607) are fixed on the inner wall of the steel strip (606) and are spaced apart. A first mounting hole (608) is provided on the first mounting plate (604), and the first mounting hole (608) is matched with the screw rod (602); The second mounting hole (609) is formed on the second mounting plate (605), and the second mounting hole (609) and the inner wall of the pipe (607) are both in contact with the filter tube (64); The nut (610) is threadedly connected to the screw (602); The filter element (63) covering all the leakage holes (601) is sleeved on the filter element tube (64) and locked by a plurality of clamps (611).

4. The novel high-efficiency acidic water multi-stage oil removal device according to claim 1 is characterized in that: The baffle oil filter assembly (7) comprises a baffle cover frame (71), a second coalescing filler (72), a baffle bottom frame (73) and a first fixed channel steel (74). Two groups of first fixed channel steels (74) are symmetrically fixed on the inner wall of the oil removal tank (1) and are distributed up and down; The baffle bottom frame (73) is connected to the first fixed channel steel (74) at the bottom, and a lower baffle hole (731) is provided in the middle of the baffle bottom frame (73) to allow the circulation pipe (5) to pass through, and the diameter of the lower baffle hole (731) is larger than the diameter of the circulation pipe (5), and the other areas of the baffle bottom frame (73) except the lower baffle hole (731) are completely blocked; The baffle cover frame (71) is connected to the first fixed channel steel (74) at the upper portion, and a second through hole (712) is provided in the middle portion of the baffle cover frame (71) for allowing the circulation pipe (5) to pass through. The diameter of the second through hole (712) is equal to the diameter of the circulation pipe (5). An upper baffle hole (711) is provided on the circumference of the outer edge of the baffle cover frame (71). The baffle cover frame (71) is completely blocked except for the second through hole (712) and the upper baffle hole (711). The second coalescing filler (72) is arranged between the deflection cover frame (71) and the deflection bottom frame (73) and is in contact with the blocking areas of the two.

5. The novel high-efficiency acidic water multi-stage oil removal device according to claim 1 is characterized in that: The coalescing oil filter assembly (8) comprises a coalescing cover plate frame (81), a first coalescing filler (82), a coalescing bottom frame (83) and a second fixed channel steel (84); The coalescing cover frame (81) and the coalescing bottom frame (83) are both connected to the second fixed channel steel (84) and are distributed up and down; The coalescing cover frame (81) and the coalescing bottom frame (83) are both made of porous plates, and a third through hole is opened in the center of each of them, which allows the circulation pipe (5) to pass through and is located in the same vertical direction. The diameter of the third through hole is equal to the diameter of the circulation pipe (5); The first coalescing filler (82) is located between the coalescing cover frame (81) and the coalescing bottom frame (83).

6. A novel high-efficiency acidic water multi-stage oil removal device according to claim 4, characterized in that: The steam cleaning assembly (9) comprises a first cleaning pipe (91), a second cleaning pipe (92), a tee pipe, a support seat and a steam boiler. The first cleaning pipe (91) is spirally arranged along the bottom surface of the coalescing bottom frame (83) and a plurality of first nozzles facing vertically upward are provided on the first cleaning pipe (91); The second cleaning pipe (92) is a special-shaped pipe, and the end of the second cleaning pipe (92) passes through the lower deflection hole (731) and extends to the area between the deflection cover frame (71) and the deflection bottom frame (73). A support seat for supporting the second cleaning pipe (92) is fixed on the circulation pipe (5). The second cleaning pipe (92) is coiled around the periphery of the circulation pipe (5) and does not contact the circulation pipe (5). The second cleaning pipe (92) is provided with a plurality of second nozzles facing the second agglomerating fillers (72) on both sides. The initial ends of the first cleaning pipe (91) and the second cleaning pipe (92) both extend to the outside of the deoiling tank (1) and are connected to the steam pipeline through a three-way pipe. The steam pipeline is connected to the steam boiler.

7. A novel high-efficiency acidic water multi-stage oil removal device according to claim 6, characterized in that: The second cleaning pipe (92) is provided with an extension pipe connected to the interior thereof and arranged in the height direction. The extension pipe is provided with a plurality of third nozzles directed towards different height areas of the second coalescing fillers (72) on both sides to expand the steam cleaning range of the second coalescing fillers (72).

8. The novel high-efficiency acidic water multi-stage oil removal device according to claim 2 is characterized in that: The oil removal tank (1) is fixedly provided with a mounting plate (11), a flocculent barrel (4) and a coil support (12) are fixedly provided on the mounting plate (11), and a heating coil is provided on the coil support (12) and is in contact with the outer walls of the cyclone separation tube (33), the reducer (35) and the liquid outlet pipe (36), and steam flows in the heating coil.

9. The novel high-efficiency acidic water multi-stage oil removal device according to claim 2 is characterized in that: The double oil discharge assembly comprises a first oil outlet (13), an oil discharge chamber (14), a second oil outlet (15), an oil-water interface meter (16), a low-pressure storage container, a siphon pipe and a solenoid valve. The top of the de-oiling tank (1) is provided with the first oil outlet (13), the second oil outlet (15) and the oil-water interface meter (16). The first oil outlet (13) is connected to the oil discharge chamber (14) at the top of the de-oiling tank (1), and the oil discharge chamber (14) is connected to a plurality of overflow pipes (34). The probe of the oil-water interface meter (16) extends into the interior of the de-oiling tank (1). The second oil outlet (15) and the low-pressure storage container are connected via the siphon pipe, and the siphon pipe is provided with a solenoid valve.

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