A nano-gas flotation rotary drum refining waste oil treatment device

Abstract

The invention provides a nano-gas flotation rotary drum refining waste oil treatment device, which relates to the technical field of waste oil treatment, and comprises a device installation frame, a driving hollow shaft motor is fixedly installed in the middle of the device installation frame, an inner tank connecting hollow shaft is fixedly installed on the upper end of the oil discharge sealing base, a plurality of air guide pipes are fixedly installed on the side of the gas collecting head, and a micro-nano two-phase nozzle is fixedly installed on the outer end of the air guide pipe; the waste oil to be treated is added upward from the second shaft sleeve connecting pipe, and high-pressure gas is introduced into one end of the high-pressure gas three-way joint, and then a part of the high-pressure gas three-way joint is connected to the microporous membrane filter component through the upper foaming connecting pipe, and the other part is shunted from the gas collecting head to each micro-nano two-phase nozzle through the bubble center axis air pipe, and then tiny bubbles are sprayed out through the micro-nano two-phase nozzle, so that the generated bubbles can be attached to the oil suspended in the waste oil, the oil is filtered through the microporous membrane filter component, and the remaining liquid is filtered, so that the waste oil can be separated.

Description

Technical Field

[0001] The invention relates to the technical field of waste oil treatment, in particular to a nanometer air flotation rotary drum waste oil refining treatment device. Background Art

[0002] With the development of industrial production, the amount of waste oil generated in the refining process is increasing day by day. These waste oils not only pollute the environment, but also waste precious resources. Traditional waste oil treatment methods have problems such as low efficiency, high energy consumption, and secondary pollution. For example, ordinary flotation devices are difficult to produce stable and efficient micro-nano bubbles, resulting in poor separation of impurities and oil in waste oil. Therefore, it is particularly important to develop efficient and environmentally friendly waste oil treatment technology. Although the existing treatment technology has solved the above problems to a certain extent, there are still defects such as incomplete oil-water separation and easy clogging of equipment during the treatment process. The present invention aims to provide a new solution to overcome the shortcomings of the prior art. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a nanometer air flotation rotary drum refining waste oil treatment device, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a nano-flotation rotating drum refining waste oil treatment device, including a device installation frame, a driving hollow shaft motor is fixedly installed in the middle of the device installation frame, a motor hollow shaft is fixedly connected to the output shaft of the driving hollow shaft motor, an oil drain seal base is fixedly installed on the upper end of the motor hollow shaft, an inner tank connected hollow shaft is fixedly installed on the upper end of the oil drain seal base, a centrifugal inner tank is fixedly installed on the upper end of the inner tank connected hollow shaft, an air collecting head is provided at the bottom of the centrifugal inner tank, a plurality of air guide pipes are fixedly installed on the side of the air collecting head, and a micro-nano two-phase nozzle is fixedly installed on the outer end of the air guide pipe.

[0005] Preferably, the micro-nano two-phase nozzle comprises: a nozzle housing, a threaded air inlet, a liquid inlet, a first mixing chamber, and a mixing chamber gas outlet;

[0006] A threaded air inlet is provided at the upper end of the nozzle housing, a first mixing chamber is integrally provided at the lower end of the threaded air inlet, a plurality of mixing chamber gas outlets are provided at the outer end of the first mixing chamber, and a plurality of liquid inlets are provided at the outer end of the first mixing chamber.

[0007] Preferably, a threaded channel seat is provided at the lower end of the first mixing chamber, a second mixing chamber is provided at the lower end of the threaded channel seat, a bubble tube cutter is provided at the lower end of the second mixing chamber, and a piezoelectric ceramic piece is fixedly mounted at the lower end of the nozzle housing.

[0008] Preferably, a bubble central axis air pipe is arranged at the lower end of the gas collecting head and located inside the hollow shaft of the motor, a high-pressure gas three-way joint is fixedly installed at the lower end of the bubble central axis air pipe, a foam blowing connecting pipe is fixedly installed on the side of the high-pressure gas three-way joint, and a telescopic throat is connected to the upper end of the foam blowing connecting pipe.

[0009] Preferably, a first sealing rotating shaft sleeve is rotatably mounted on the oil drain seal base, a first shaft sleeve connecting pipe is connected to the side of the first sealing rotating shaft sleeve, an outer tank oil drain pipe is rotatably arranged on the upper end of the first sealing rotating shaft sleeve, and a centrifugal outer tank is fixedly mounted on the upper end of the outer tank oil drain pipe.

[0010] Preferably, a fixed upper cover is provided at the upper end of the centrifugal outer tank, a second sealing rotating shaft sleeve is rotatably installed on the hollow shaft of the motor, a second sleeve connecting pipe is fixedly connected to the side of the second sealing rotating shaft sleeve, and a sleeve fixing support frame is fixedly installed on the side of the first sealing rotating shaft sleeve and the second sealing rotating shaft sleeve;

[0011] A microporous membrane filtration component is fixedly installed on the upper end of the centrifugal inner tank, a filtration component connecting ring is fixedly installed on the upper end of the microporous membrane filtration component, and the upper end of the filtration component connecting ring is fixedly connected to the centrifugal outer tank.

[0012] Preferably, the microporous membrane filtration assembly comprises: an overflow oil guide plate ring, a first telescopic joint tube, a second telescopic joint tube, a joint tube metal ring, a joint tube limiting pull ring, an outer tank limiting slide rod, and a slide rod mounting liner;

[0013] The lower end of the overflowing oil guide plate ring is fixedly connected to the second telescopic joint tube, and the first telescopic joint tube is arranged above the overflowing oil guide plate ring. The bending parts of the outer ends of the first telescopic joint tube and the second telescopic joint tube are both provided with joint tube metal rings, and the outer end of each of the joint tube metal rings is integrally provided with a plurality of joint tube limiting pull rings, and each of the joint tube limiting pull rings is interspersed with an outer tank limiting slide rod;

[0014] The rear end of each outer tank limiting slide bar is fixedly connected with a slide bar mounting liner, and the slide bar mounting liner is fixedly mounted on the inner surface of the centrifugal outer tank.

[0015] Preferably, a microporous membrane installation ring is fixedly installed on the inner side of the overflow oil guide plate ring, and a polytetrafluoroethylene microporous membrane is arranged in the microporous membrane installation ring;

[0016] A floating airbag is fixedly installed at the lower end of the microporous membrane installation ring, a cross support frame is fixedly installed on the inner side of the floating airbag, and a gas purge component is fixedly installed at the middle upper end of the cross support frame.

[0017] Preferably, the gas purge assembly comprises: a purge assembly base, a microporous membrane mounting slot, an air blowing slot, a purge assembly top cover, a top cover connecting pipe, a purge pipe hole, a purge main pipe, an air collecting inner slot, and an air collecting main pipe port;

[0018] A microporous membrane installation groove is provided on the side of the purge assembly base, a purge main pipe is integrated in the middle of the purge assembly base, a plurality of purge pipe holes are provided on the side of the purge main pipe, an air collecting inner groove is provided on the outer side of the purge main pipe, and an air blowing slot is provided at the outer end of the air collecting inner groove;

[0019] A purge assembly top cover is integrally provided at the upper end of the purge main pipe, a top cover connecting pipe is integrally provided at the upper end of the purge assembly top cover, and an air collecting main pipe opening is provided in the top cover connecting pipe.

[0020] Preferably, the upper end of the top cover connecting pipe is connected to the telescopic throat, and the inner ring of the polytetrafluoroethylene microporous membrane is installed in the microporous membrane installation groove.

[0021] The present invention provides a nanometer air flotation rotary drum refining waste oil treatment device. It has the following beneficial effects:

[0022] (1) The present invention adds the waste oil to be treated upward from the second shaft sleeve connecting pipe and into the centrifugal inner tank through the hollow shaft of the motor, then starts to introduce high-pressure gas at one end of the high-pressure gas three-way joint, then a part of the high-pressure gas is connected to the microporous membrane filter component through the upper foaming connecting pipe through the high-pressure gas three-way joint, and the other part is diverted from the gas collecting head to each micro-nano two-phase nozzle through the bubble center axis air pipe, and then tiny bubbles are sprayed out through the micro-nano two-phase nozzle, so that the generated bubbles can be attached to the oil suspended in the waste oil, and the oil is filtered through the microporous membrane filter component, and the remaining liquid is filtered, so that the waste oil can be separated;

[0023] (2) The present invention uses a microporous membrane filter assembly to filter out the filtered oil through the gap between the centrifugal outer tank and the centrifugal inner tank, and then discharges the oil through the outer tank oil discharge pipe to the first sealing rotating shaft sleeve and the first shaft sleeve connecting pipe. When the microporous membrane filter assembly sprays bubbles, the hollow shaft motor is started to drive the centrifugal inner tank to rotate through the hollow shaft of the motor, and the centrifugal outer tank rotates synchronously through the fixed upper cover. The foam blowing connecting pipe is transmission-connected to the fixed upper cover, so that the oil foam can be thrown onto the inner wall of the centrifugal inner tank through the centrifugal rotation force. The inner wall of the centrifugal inner tank is provided with an oleophilic and hydrophobic coating to facilitate filtration.

[0024] (3) The present invention uses a high-pressure airflow connected to a threaded air inlet in a micro-nano two-phase nozzle to pass through and mix in a first mixing chamber. Here, according to Bernoulli's principle, in a fluid, the greater the flow velocity, the smaller the pressure. That is, the pressure of a high-speed fluid should be smaller than the pressure at a slower flow velocity in the outside world, rather than larger. After the high-speed airflow is mixed in the first mixing chamber, the pressure at the high-speed airflow becomes smaller, so that the external dirty oil can be sucked in and mixed through the liquid inlet, and then mixed again through the threaded channel seat, and finally mixed in the second mixing chamber, and then the large bubbles are cut into small bubbles by a bubble cutter, and then vibrated and ejected through a piezoelectric ceramic sheet;

[0025] (4) The present invention uses a floating airbag in the microporous membrane filtration assembly to adapt to the lower liquid level excluding the filtered oil, and through the first telescopic joint tube and the second telescopic joint tube, the overflow space and the overflow oil guide plate ring between the two can follow the movement of the liquid level, and the cross support frame can make the middle gas purge assembly follow the movement, and the joint tube limit pull rings on the sides of the first telescopic joint tube and the second telescopic joint tube slide on the outer tank limit slide rod, which can limit the centrifugal outer tank and the centrifugal inner tank when rotating, ensuring stable filtration of the polytetrafluoroethylene microporous membrane flat on the liquid surface;

[0026] (5) The present invention connects the air pressure to the telescopic throat and the top cover connecting pipe through the foam blowing connecting pipe, and then reduces the diameter of the gas passing through the purge pipe hole on the side of the lower end purge main pipe, thereby increasing the flow rate, so that the gas can be blown away through the unobstructed blowing slots on all sides to the overflow oil guide plate ring, thereby accelerating overflow filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of another viewing angle in the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the present invention from a side view;

[0030] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure along line aa;

[0031] Figure 5 This is a schematic diagram of the structure of the micro-nano two-phase nozzle in the present invention;

[0032] Figure 6 It is a schematic diagram of the side view structure of the micro-nano two-phase nozzle in the present invention;

[0033] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure of the middle bb line;

[0034] Figure 8 It is a schematic diagram of the structure of the microporous membrane filtration component in the present invention;

[0035] Fig. 9 It is a schematic side view of the structure of the microporous membrane filtration assembly of the present invention;

[0036] Fig.10 For the present invention Fig. 9 Schematic diagram of the cross-sectional structure of the middle cc line;

[0037] Fig.11 It is a schematic diagram of the structure of the gas purge assembly in the present invention;

[0038] Fig.12 It is a side view structural schematic diagram of the gas purge assembly in the present invention;

[0039] Fig.13 For the present invention Fig.12 Schematic diagram of the cross-sectional structure of the dd line.

[0040] Among them, 1. device installation frame; 2. driving hollow shaft motor; 3. first sealed rotating shaft sleeve; 4. second sealed rotating shaft sleeve; 5. shaft sleeve fixing support frame; 6. high-pressure gas three-way joint; 7. blowing connecting pipe; 8. centrifugal outer tank; 9. fixed upper cover; 10. motor hollow shaft; 11. first shaft sleeve connecting pipe; 12. second shaft sleeve connecting pipe; 13. bubble central axis air pipe; 14. gas collecting head; 15. air guide pipe; 16. micro-nano two-phase nozzle; 1601. nozzle shell; 1602. threaded air inlet; 1603. liquid inlet; 1604. first mixing chamber; 1605. mixing chamber gas outlet; 1606. threaded channel seat; 1607. second mixing chamber; 1608. bubble tube cutter; 1609. piezoelectric ceramic sheet; 17. centrifugal inner tank; 18. inner tank connected to hollow shaft; 19. oil discharge sealing base; 20. microporous membrane Filter assembly; 2001, overflowing oil guide plate ring; 2002, polytetrafluoroethylene microporous membrane; 2003, gas purge assembly; 20031, purge assembly base; 20032, microporous membrane installation slot; 20033, air blowing slot; 20034, purge assembly top cover; 20035, top cover connecting pipe; 20036, purge pipe hole; 20037, purge main pipe; 20038, air collecting inner tank; 200 39. Air collecting main inlet; 2004. First telescopic joint pipe; 2005. Second telescopic joint pipe; 2006. Joint pipe metal ring; 2007. Joint pipe limit pull ring; 2008. External tank limit slide bar; 2009. Slide bar mounting lining plate; 2010. Microporous membrane mounting ring; 2011. Floating airbag; 2012. Cross support frame; 21. Telescopic throat; 22. Filter assembly connecting ring; 23. External tank oil drain pipe. DETAILED DESCRIPTION

[0041] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0042] like Figures 1 to 4 As shown, an embodiment of the present invention provides a nano-flotation rotating drum refining waste oil treatment device, including a device installation frame 1, a driving hollow shaft motor 2 is fixedly installed in the middle of the device installation frame 1, a motor hollow shaft 10 is fixedly connected to the output shaft of the driving hollow shaft motor 2, an oil drain seal base 19 is fixedly installed on the upper end of the motor hollow shaft 10, an inner tank connecting hollow shaft 18 is fixedly installed on the upper end of the oil drain seal base 19, a centrifugal inner tank 17 is fixedly installed on the upper end of the inner tank connecting hollow shaft 18, an air collecting head 14 is provided at the bottom of the centrifugal inner tank 17, a plurality of air guide pipes 15 are fixedly installed on the side of the air collecting head 14, and a micro-nano two-phase nozzle 16 is fixedly installed on the outer end of the air guide pipe 15.

[0043] A bubble center axis air pipe 13 is arranged at the lower end of the gas collecting head 14 and is located in the hollow shaft 10 of the motor. A high-pressure gas three-way joint 6 is fixedly installed at the lower end of the bubble center axis air pipe 13. A foam blowing connecting pipe 7 is fixedly installed on the side of the high-pressure gas three-way joint 6. A telescopic throat 21 is connected to the upper end of the foam blowing connecting pipe 7. A first sealing rotating shaft sleeve 3 is rotatably installed on the oil drain seal base 19. The first sealing rotating shaft sleeve is connected to the first shaft sleeve connecting pipe 11 on the side. An outer tank oil drain pipe 23 is rotatably arranged on the upper end of the first sealing rotating shaft sleeve 3. The upper end of the outer tank oil drain pipe 23 is fixed A centrifugal outer tank 8 is installed, and a fixed upper cover 9 is arranged on the upper end of the centrifugal outer tank 8; a second sealed rotating shaft sleeve 4 is rotatably installed on the hollow shaft 10 of the motor, and a second sleeve connecting pipe 12 is fixedly connected to the side of the second sealed rotating shaft sleeve 4, and a sleeve fixing support frame 5 is fixedly installed on the side of the first sealed rotating shaft sleeve 3 and the second sealed rotating shaft sleeve 4; a microporous membrane filter component 20 is fixedly installed on the upper end of the centrifugal inner tank 17, and a filter component connecting ring 22 is fixedly installed on the upper end of the microporous membrane filter component 20, and the upper end of the filter component connecting ring 22 is fixedly connected to the centrifugal outer tank 8.

[0044] In the above technical scheme, the waste oil to be treated is added upward from the second sleeve connecting pipe 12 and added into the centrifugal inner tank 17 through the motor hollow shaft 10, and then one end of the high-pressure gas three-way joint 6 is started to pass high-pressure gas, and then a part of the high-pressure gas three-way joint 6 is connected to the microporous membrane filter component 20 through the upper foaming connecting pipe 7, and the other part is diverted from the gas collecting head 14 to each micro-nano two-phase nozzle 16 through the bubble center axis air pipe 13, and then tiny bubbles are sprayed out through the micro-nano two-phase nozzle 16, so that the generated bubbles can be attached to the oil suspended in the waste oil, and the oil is filtered through the microporous membrane filter component 20, and the remaining liquid is filtered, so that the waste oil can be separated;

[0045] The filtered oil is passed through the microporous membrane filtration component 20 to flow out from the gap between the centrifugal outer tank 8 and the centrifugal inner tank 17, and then the oil is discharged through the outer tank oil discharge pipe 23 to the first sealing rotating shaft sleeve 3 and the first shaft sleeve connecting pipe 11. When the microporous membrane filtration component 20 sprays bubbles, the hollow shaft motor 2 is started to drive the centrifugal inner tank 17 to rotate through the motor hollow shaft 10, and the centrifugal outer tank 8 rotates synchronously through the fixed upper cover 9, and the foam blowing connecting pipe 7 is transmission-connected to the fixed upper cover 9, so that the oil foam can be thrown onto the inner wall of the centrifugal inner tank 17 through the centrifugal rotational force, and the inner wall of the centrifugal inner tank 17 is provided with an oleophilic and hydrophobic coating for easy filtration.

[0046] like Figure 4 , Figures 5 to 7 As shown, the micro-nano two-phase nozzle 16 includes: a nozzle housing 1601, a threaded air inlet 1602, a liquid inlet 1603, a first mixing chamber 1604, and a mixing chamber gas outlet 1605; a threaded air inlet 1602 is provided at the upper end of the nozzle housing 1601, and a first mixing chamber 1604 is integrally provided at the lower end of the threaded air inlet 1602, a plurality of mixing chamber gas outlets 1605 are provided at the inner end of the first mixing chamber 1604, a plurality of liquid inlets 1603 are provided at the outer end of the first mixing chamber 1604, a threaded channel seat 1606 is provided at the lower end of the first mixing chamber 1604, a second mixing chamber 1607 is provided at the lower end of the threaded channel seat 1606, a bubble tube cutter 1608 is provided at the lower end of the second mixing chamber 1607, and a piezoelectric ceramic piece 1609 is fixedly mounted at the lower end of the nozzle housing 1601.

[0047] In the above technical solution, the high-pressure airflow connected to the threaded air inlet 1602 in the micro-nano two-phase nozzle 16 passes through and mixes in the first mixing chamber 1604. Here, according to Bernoulli's principle, in the fluid, the greater the flow rate, the smaller the pressure. In other words, the pressure of the high-speed fluid should be smaller than the pressure at the place where the external flow rate is slow, not larger. After the high-speed airflow is used to mix in the first mixing chamber, since the pressure at the high-speed airflow becomes smaller, the external dirty oil can be sucked in and mixed through the liquid inlet, so that the external dirty oil can be sucked in and mixed through the liquid inlet 1603, and then mixed again through the threaded channel seat 1606, and finally mixed in the second mixing chamber 1607, and then the large bubbles are cut into small bubbles by the bubble cutter 1608, and then vibrated and ejected through the piezoelectric ceramic sheet 1609.

[0048] like Figure 4 , Figures 8 to 10 As shown, the microporous membrane filtration assembly 20 includes: an overflowing oil guide plate ring 2001, a first telescopic joint tube 2004, a second telescopic joint tube 2005, a joint tube metal ring 2006, a joint tube limiting pull ring 2007, an outer tank limiting slide bar 2008, and a slide bar mounting liner 2009; the overflowing oil guide plate ring 2001 is fixedly connected to the second telescopic joint tube 2005 at the lower end, the overflowing oil guide plate ring 2001 is provided with a first telescopic joint tube 2004 above the overflowing oil guide plate ring 2001, and the bending parts of the outer ends of the first telescopic joint tube 2004 and the second telescopic joint tube 2005 are provided with joint tube metal rings 2006, and the outer ends of each of the joint tube metal rings 2006 are integrally provided with a plurality of joint tube limiting pull rings 2007, and each of the joint tube metal rings 2006 is provided with a plurality of joint tube limiting pull rings 2007. The joint tube limit pull ring 2007 is interspersed with an outer tank limit slide bar 2008; the rear end of each outer tank limit slide bar 2008 is fixedly connected with a slide bar mounting liner 2009, and the slide bar mounting liner 2009 is fixedly mounted on the inner surface of the centrifugal outer tank 8; a microporous membrane mounting ring 2010 is fixedly mounted on the inner side of the overflow oil guide plate ring 2001, and a polytetrafluoroethylene microporous membrane 2002 is arranged in the microporous membrane mounting ring 2010; a floating airbag 2011 is fixedly mounted on the lower end of the microporous membrane mounting ring 2010, a cross support frame 2012 is fixedly mounted on the inner side of the floating airbag 2011, and a gas purge assembly 2003 is fixedly mounted on the middle upper end of the cross support frame 2012.

[0049] like Figure 8 , Figures 11 to 13As shown, the gas purge assembly 2003 includes: a purge assembly base 20031, a microporous membrane mounting groove 20032, a blowing empty groove 20033, a purge assembly top cover 20034, a top cover connecting pipe 20035, a purge pipe hole 20036, a purge main pipe 20037, an air collecting inner groove 20038, and an air collecting main pipe port 20039; the purge assembly base 20031 is provided with a microporous membrane mounting groove 20032 on the side, the purge assembly base 20031 is integrated with a purge main pipe 20037 in the middle, and the purge main pipe 20037 is provided with a plurality of purge pipe holes 20036 on the side. 036, an air collecting inner groove 20038 is arranged on the outer side of the purge main pipe 20037, and an air blowing empty groove 20033 is opened on the outer end of the air collecting inner groove 20038; a purge assembly top cover 20034 is integrated on the upper end of the purge main pipe 20037, and a top cover connecting pipe 20035 is integrated on the upper end of the purge assembly top cover 20034, and an air collecting main pipe port 20039 is arranged in the top cover connecting pipe 20035, and the upper end of the top cover connecting pipe 20035 is connected to the telescopic throat 21, and the inner ring of the polytetrafluoroethylene microporous membrane 2002 is installed in the microporous membrane installation groove 20032.

[0050] In the above technical solution, the floating airbag 2011 in the microporous membrane filtration assembly 20 adapts to the liquid level below that is dropped without filtering out the oil, and the overflow space and the overflow oil guide plate ring 2001 between the first telescopic joint tube 2004 and the second telescopic joint tube 2005 can be moved with the liquid level, and the gas purge assembly 2003 in the middle can be moved with the cross support frame 2012, and the tube limiting pull ring 2007 on the side of the first telescopic joint tube 2004 and the second telescopic joint tube 2005 slides on the outer tank limiting slide bar 2008, which can limit the centrifugal outer tank 8 and the centrifugal inner tank 17 from rotating, ensuring the stable filtration of the polytetrafluoroethylene microporous membrane 2002 flat on the liquid surface;

[0051] The air pressure is connected to the telescopic throat 21 and the top cover connecting pipe 20035 through the foam blowing connecting pipe 7, and then the diameter of the gas passing through the purge pipe hole 20036 on the side of the lower end purge main pipe 20037 is reduced to increase the flow rate, so that the gas can be blown away through the unobstructed blowing slots 20033 on all sides to fill the oil guide plate ring 2001, thereby accelerating overflow filtration.

[0052] Working principle:

[0053] The present invention adds the waste oil to be treated upward from the second shaft sleeve connecting pipe 12 and adds it into the centrifugal inner tank 17 through the motor hollow shaft 10, then starts one end of the high-pressure gas three-way joint 6 to pass high-pressure gas, then a part of it is connected to the microporous membrane filter component 20 through the upper foaming connecting pipe 7 through the high-pressure gas three-way joint 6, and the other part is diverted from the gas collecting head 14 to each micro-nano two-phase nozzle 16 through the bubble center axis air pipe 13, and then tiny bubbles are sprayed out through the micro-nano two-phase nozzle 16, so that the generated bubbles can be attached to the oil suspended in the waste oil, and the oil is filtered through the microporous membrane filter component 20, and the remaining liquid is blocked, so that the waste oil can be separated;

[0054] Among them, the filtered oil is discharged through the microporous membrane filter component 20 in the gap between the centrifugal outer tank 8 and the centrifugal inner tank 17, and then the oil is discharged through the outer tank oil discharge pipe 23 to the first sealing rotating shaft sleeve 3 and the first shaft sleeve connecting pipe 11. When the microporous membrane filter component 20 sprays bubbles, the hollow shaft motor 2 is started to drive the centrifugal inner tank 17 to rotate through the motor hollow shaft 10, and the centrifugal outer tank 8 is rotated synchronously through the fixed upper cover 9, and the foam blowing connecting pipe 7 is transmission-connected to the fixed upper cover 9, so that the oil foam can be thrown onto the inner wall of the centrifugal inner tank 17 through the centrifugal rotation force, and the inner wall of the centrifugal inner tank 17 is provided with an oleophilic and hydrophobic coating for easy filtration;

[0055] Among them, the high-pressure airflow connected through the threaded air inlet 1602 in the micro-nano two-phase nozzle 16 passes through and mixes in the first mixing chamber 1604. After being mixed in the first mixing chamber by the high-speed airflow, the pressure at the high-speed airflow becomes smaller, and the external dirty oil can be sucked in and mixed through the liquid inlet 1603, and then mixed again through the threaded channel seat 1606, and finally mixed in the second mixing chamber 1607, and then the large bubbles are cut into small bubbles by the bubble cutter 1608, and then vibrated and ejected through the piezoelectric ceramic piece 1609;

[0056] The floating airbag 2011 in the microporous membrane filter assembly 20 adapts to the liquid level below that is dropped without filtering out the oil, and the overflow space and the overflowing oil guide plate ring 2001 between the first and second telescopic joint tubes 2004 and 2005 can be moved with the liquid level, and the gas purge assembly 2003 in the middle can be moved with the cross support frame 2012, and the tube limiting pull ring 2007 on the side of the first and second telescopic joint tubes 2004 and 2005 slides on the outer tank limiting slide bar 2008, which can limit the centrifugal outer tank 8 and the centrifugal inner tank 17 from rotating, ensuring the stable filtration of the polytetrafluoroethylene microporous membrane 2002 flat on the liquid surface;

[0057] The fluorine atoms in the structure of the polytetrafluoroethylene microporous membrane 2002 give the material extremely low surface energy. In an oil-water mixture system, it is difficult for water molecules to wet the surface of the membrane, while oil molecules can pass through relatively easily. This is because the surface tension and other properties of oil are different from those of water. Oil can interact with the surface of the polytetrafluoroethylene microporous membrane to a certain extent and pass through the micropores. The pore size of the polytetrafluoroethylene microporous membrane can be controlled to allow oil molecules to pass through but block water molecules from passing through;

[0058] The air pressure is connected to the telescopic throat 21 and the top cover connecting pipe 20035 through the foam blowing connecting pipe 7, and then the diameter of the gas passing through the purge pipe hole 20036 on the side of the lower end purge main pipe 20037 is reduced to increase the flow rate, so that the gas can be blown away through the unobstructed blowing slots 20033 on all sides to fill the oil guide plate ring 2001, thereby accelerating overflow filtration.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A nanometer air flotation rotary drum refining waste oil treatment device, comprising a device installation frame (1), characterized in that: A driving hollow shaft motor (2) is fixedly mounted in the middle of the device mounting frame (1); a motor hollow shaft (10) is fixedly connected to the output shaft of the driving hollow shaft motor (2); an oil drain seal base (19) is fixedly mounted on the upper end of the motor hollow shaft (10); an inner tank connecting hollow shaft (18) is fixedly mounted on the upper end of the oil drain seal base (19); a centrifugal inner tank (17) is fixedly mounted on the upper end of the inner tank connecting hollow shaft (18); a gas collecting head (14) is arranged at the bottom of the centrifugal inner tank (17); a plurality of air guide pipes (15) are fixedly mounted on the side of the air collecting head (14); and a micro-nano two-phase nozzle (16) is fixedly mounted on the outer end of the air guide pipe (15); A first sealing shaft sleeve (3) is rotatably mounted on the oil drain seal base (19); a first shaft sleeve connecting pipe (11) is connected to a side of the first sealing shaft sleeve (3); an outer tank oil drain pipe (23) is rotatably mounted on the upper end of the first sealing shaft sleeve (3); a centrifugal outer tank (8) is fixedly mounted on the upper end of the outer tank oil drain pipe (23); A fixed upper cover (9) is provided at the upper end of the centrifugal outer tank (8); a second sealing rotating shaft sleeve (4) is rotatably mounted on the hollow shaft (10) of the motor; a second shaft sleeve connecting pipe (12) is fixedly connected to the side of the second sealing rotating shaft sleeve (4); and shaft sleeve fixing support frames (5) are fixedly mounted to the sides of the first sealing rotating shaft sleeve (3) and the second sealing rotating shaft sleeve (4); A microporous membrane filter assembly (20) is fixedly mounted on the upper end of the centrifugal inner tank (17), a filter assembly connecting ring (22) is fixedly mounted on the upper end of the microporous membrane filter assembly (20), and the upper end of the filter assembly connecting ring (22) is fixedly connected to the centrifugal outer tank (8); The micro-nano two-phase nozzle (16) comprises: a nozzle housing (1601), a threaded air inlet (1602), a liquid inlet (1603), a first mixing chamber (1604), and a mixing chamber gas outlet (1605); A threaded air inlet (1602) is provided at the upper end of the nozzle housing (1601); a first mixing chamber (1604) is integrally provided at the lower end of the threaded air inlet (1602); a plurality of mixing chamber gas outlets (1605) are provided at the inner end of the first mixing chamber (1604); and a plurality of liquid inlets (1603) are provided at the outer end of the first mixing chamber (1604); A threaded channel seat (1606) is provided at the lower end of the first mixing chamber (1604), a second mixing chamber (1607) is provided at the lower end of the threaded channel seat (1606), a bubble tube cutter (1608) is provided at the lower end of the second mixing chamber (1607), and a piezoelectric ceramic sheet (1609) is fixedly mounted at the lower end of the nozzle housing (1601).

2. The nanometer air flotation rotary drum refining waste oil treatment device according to claim 1 is characterized in that: A bubble center axis air pipe (13) is provided at the lower end of the gas collecting head (14) and is located inside the motor hollow shaft (10); a high-pressure gas three-way joint (6) is fixedly installed at the lower end of the bubble center axis air pipe (13); a foam blowing connecting pipe (7) is fixedly installed on the side of the high-pressure gas three-way joint (6); and a telescopic throat (21) is connected to the upper end of the foam blowing connecting pipe (7).

3. The nano-gas flotation rotary drum refining waste oil treatment device according to claim 2 is characterized in that: The microporous membrane filtration assembly (20) comprises: an overflow oil guide plate ring (2001), a first telescopic joint tube (2004), a second telescopic joint tube (2005), a joint tube metal ring (2006), a joint tube limiting pull ring (2007), an outer tank limiting slide rod (2008), and a slide rod mounting liner (2009); The lower end of the overflowing oil guide plate ring (2001) is fixedly connected to a second telescopic joint tube (2005); a first telescopic joint tube (2004) is arranged above the overflowing oil guide plate ring (2001); a joint tube metal ring (2006) is arranged at the bending part of the outer ends of the first telescopic joint tube (2004) and the second telescopic joint tube (2005); a plurality of joint tube limiting pull rings (2007) are integrally arranged at the outer end of each of the joint tube metal rings (2006); and an outer tank limiting sliding rod (2008) is inserted on each of the joint tube limiting pull rings (2007); The rear end of each outer tank limiting slide bar (2008) is fixedly connected to a slide bar mounting liner (2009), and the slide bar mounting liner (2009) is fixedly mounted on the inner surface of the centrifugal outer tank (8).

4. The nano-gas flotation rotary drum refining waste oil treatment device according to claim 3 is characterized in that: A microporous membrane installation ring (210) is fixedly installed on the inner side of the overflowing oil guide plate ring (2001), and a polytetrafluoroethylene microporous membrane (2002) is arranged inside the microporous membrane installation ring (2010); A floating airbag (2011) is fixedly mounted on the lower end of the microporous membrane mounting ring (2010), a cross support frame (2012) is fixedly mounted on the inner side of the floating airbag (2011), and a gas purge assembly (2003) is fixedly mounted on the middle upper end of the cross support frame (2012).

5. The nanometer air flotation rotary drum refining waste oil treatment device according to claim 4 is characterized in that: The gas purge assembly (2003) comprises: a purge assembly base (20031), a microporous membrane installation slot (20032), an empty blowing slot (20033), a purge assembly top cover (20034), a top cover connecting pipe (20035), a purge pipe hole (20036), a purge main pipe (20037), an air collecting inner slot (20038), and an air collecting main pipe outlet (20039); A microporous membrane installation groove (20032) is provided on the side of the purge assembly base (20031); a purge main pipe (20037) is integrally provided in the middle of the purge assembly base (20031); a plurality of purge pipe holes (20036) are provided on the side of the purge main pipe (20037); an air collecting inner groove (20038) is provided on the outer side of the purge main pipe (20037); and an air blowing empty groove (20033) is provided at the outer end of the air collecting inner groove (20038); The upper end of the purge main pipe (20037) is integrally provided with a purge assembly top cover (20034), the upper end of the purge assembly top cover (20034) is integrally provided with a top cover connecting pipe (20035), and the top cover connecting pipe (20035) is provided with an air collecting main pipe opening (20039).

6. The nano-gas flotation rotary drum refining waste oil treatment device according to claim 5 is characterized in that: The upper end of the top cover connecting pipe (20035) is connected to the telescopic throat (21), and the inner ring of the polytetrafluoroethylene microporous membrane (2002) is installed in the microporous membrane installation groove (20032).

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