A waste emulsion solid-liquid separation device and method based on flotation method

Abstract

The present application relates to the technical field of solid-liquid separation equipment, and in particular to a solid-liquid separation device and method for waste emulsion based on flotation method, comprising a containing cylinder, an opening is set at the top of the containing cylinder, and an aeration plate is set at the bottom of the containing cylinder; a fixing frame, a mounting ring is rotatably connected to the fixing frame, and a slag plate is connected to the circumference of the mounting ring; a liquid replenishing cylinder, the liquid replenishing cylinder is connected to the inner cavity of the containing cylinder, and a partition plug is slidably connected inside the liquid replenishing cylinder, the partition plug divides the inner cavity of the liquid replenishing cylinder into two liquid replenishing chambers, and a one-way liquid outlet valve is connected to the cavity wall of the liquid replenishing chamber; a liquid supply unit; a linkage unit, which is used to make the partition plug reciprocate in the liquid replenishing cylinder to cooperate with the liquid supply unit to replenish liquid into the containing cylinder; the present application has the functions of replenishing the waste emulsion in the containing cylinder, maintaining the liquid level in the containing cylinder, and improving the solid-liquid separation efficiency; through the mounting ring, the slag plate and the linkage unit, the correlation between the slag discharge of the slag plate and the movement of the partition plug is realized, thereby avoiding the effect of excessive liquid replenishment.

Description

Technical Field

[0001] The present application relates to the technical field of solid-liquid separation equipment, and in particular to a solid-liquid separation device and method for waste emulsion based on flotation. Background Art

[0002] Emulsion is a high-performance semi-synthetic metalworking fluid suitable for cooling the cutting and grinding of aluminum metal and its alloys. After a period of use, the emulsion will be mixed with solid waste generated during the processing and needs to be separated. Various separation methods can be used, such as sedimentation, filtration, filter pressing, centrifugation, and flotation separation.

[0003] Flotation separation is a method that uses the buoyancy of bubbles to separate solid or liquid particles suspended in a liquid from the liquid phase. During the flotation separation process, gas is injected into water or other liquids to form a large number of tiny bubbles. These bubbles rise to the solid-liquid or liquid-liquid interface in the mixed liquid and come into contact with and adhere to suspended particles or pollutants. As the bubbles rise, the solid particles or pollutants are also brought to the surface of the liquid, forming scum or oil floating, which can finally be cleaned up.

[0004] The prior art discloses an integrated device for purifying emulsions used online, comprising a first driving pump, a sedimentation separation chamber, a filtration separation chamber, an ozone flotation separation chamber, an electrocoagulation separation chamber, a solid-liquid separation chamber, a scum separation chamber, a second driving pump, an ozone generator, a clean liquid tank, a third driving pump and a filter tank. The first driving pump is connected to the filter tank and the sedimentation separation chamber, the sedimentation separation chamber, the filtration separation chamber, the ozone flotation separation chamber and the electrocoagulation separation chamber are connected in sequence from bottom to top, the solid-liquid separation chamber is arranged outside the electrocoagulation separation chamber and the ozone flotation separation chamber, the scum separation chamber is arranged outside the solid-liquid separation chamber, the second driving pump is connected to the filtration separation chamber, the solid-liquid separation chamber and the ozone flotation separation chamber, the ozone generator is connected to the second driving pump, the solid-liquid separation chamber is connected to the clean liquid tank, the third driving pump is connected to the clean liquid tank and the working area, and the filter tank is connected to the working area to collect the emulsion refluxed from the working area.

[0005] Regarding the above-mentioned related technologies, during the solid-liquid separation process of the emulsion in the scum separation chamber, some liquid will flow out along with the discharge of the scum, causing the liquid level of the emulsion to drop, resulting in a height difference with the separation structure in the scum separation chamber, affecting the solid-liquid separation efficiency. Summary of the Invention

[0006] In order to improve the solid-liquid separation efficiency, the present application provides a waste emulsion solid-liquid separation device and method based on flotation.

[0007] The present application provides a waste emulsion solid-liquid separation device and method based on flotation method, which adopts the following technical solutions:

[0008] In a first aspect, the present application provides a waste emulsion solid-liquid separation device based on flotation method.

[0009] A waste emulsion solid-liquid separation device based on air flotation method, comprising

[0010] A receiving tube, wherein the top of the receiving tube is open and the bottom of the receiving tube is provided with an aeration plate, and the aeration plate is used to introduce gas into the liquid in the receiving tube;

[0011] A fixing frame, wherein a mounting ring is rotatably connected to the fixing frame, and at least one slag discharge plate is connected to the circumference of the mounting ring, and the slag discharge plate is used to move the upper layer of slag in the containing cylinder;

[0012] A fluid refilling cylinder, which is hollow and connected to the inner cavity of the accommodating cylinder, and a partition plug is slidably connected to the inner cavity of the fluid refilling cylinder, the partition plug divides the inner cavity of the fluid refilling cylinder into two fluid refilling chambers, and a one-way liquid outlet valve is connected to the cavity wall of the fluid refilling chamber;

[0013] a liquid supply unit connected to the two liquid infusion chambers;

[0014] A linkage unit is connected to the fixing frame and the linkage unit is connected to the slag discharge plate, and is used to make the partition plug reciprocate in the liquid replenishing cylinder to cooperate with the liquid supply unit to replenish liquid in the accommodating cylinder.

[0015] By adopting the above technical solution, a waste emulsion solid-liquid separation device based on the flotation method is designed. The receiving tube can provide a working environment for solid-liquid separation, and gas can be introduced into the waste emulsion through the aeration plate, thereby driving the solid particles in the waste emulsion to the surface to form scum. Through the cooperation of the liquid replenishment tube, the separation plug and the one-way liquid outlet valve, the waste emulsion in the receiving tube can be replenished by extracting waste emulsion from the liquid supply unit when the separation plug moves up and down, thereby maintaining the liquid level in the receiving tube and improving the solid-liquid separation efficiency; through the installation ring, the slag discharge plate and the linkage unit, the correlation between the slag discharge of the slag discharge plate and the movement of the separation plug can be achieved, thereby reducing the possibility of excessive liquid replenishment.

[0016] In a specific embodiment, the linkage unit includes

[0017] a piston rod, the piston rod being connected to the separation plug and extending into the mounting ring;

[0018] Two linkage rods are connected to the piston rod, and the two linkage rods are evenly distributed horizontally around the piston rod. The mounting ring is connected to an annular lifting groove, and the linkage rods extend into the annular lifting groove.

[0019] By adopting the above technical solution, the designed linkage unit, through the cooperation of the linkage rod and the annular lifting groove, can realize the reciprocating lifting movement of the piston rod while the mounting ring rotates, thereby driving the movement of the separation plug to complete the fluid replenishment action.

[0020] In a specific embodiment, the linkage unit includes

[0021] a cylinder connected to the fixing frame;

[0022] A spiral rod, one end of which is connected to the cylinder piston rod, and the other end passes through the mounting ring and is connected to the separating plug. The outer peripheral side of the extending section of the spiral rod extending out of the fluid infusion cylinder is integrally connected with a spiral recess, and a columnar protrusion adapted to the spiral recess is provided in the mounting ring.

[0023] By adopting the above technical solution, the linkage unit is designed, which can easily drive the spiral rod to move up and down through the cylinder, and the rotation of the mounting ring can be achieved through the cooperation of the spiral depression and the columnar protrusion, thereby completing the scum discharge action.

[0024] In a specific embodiment, the partition plug comprises

[0025] A hollow section, wherein the outer peripheral side of the hollow section is slidably connected to the inner cavity wall of the fluid infusion cylinder, the interior of the hollow section is hollow, and an adjustment hole is opened on the hollow section, and the adjustment hole can connect the two fluid infusion cavities;

[0026] A blocking plate, the blocking plate being located in the inner cavity of the hollow section and being rotatably connected to the hollow section, the blocking plate being provided with a plurality of through holes, and being able to change the opening and closing state of the regulating hole after the blocking plate is rotated;

[0027] A fixing member is installed on the hollow section and connected to the blocking plate to fix the blocking plate.

[0028] By adopting the above technical solution, a dividing plug is designed, which can divide the inner cavity of the refill cylinder into two refill chambers through the hollow section. The connection size of the adjustment hole can be changed through the sealing plate, and then the volume of the waste emulsion in the refill chamber entering the holding cylinder can be changed on the basis of the same hollow section stroke, thereby avoiding the possibility of waste emulsion being wasted due to the large difference between the amount of liquid pushed out by the slag discharge plate and the amount of liquid replenished, and the sealing plate can be easily fixed by the fixing parts.

[0029] In a specific embodiment, the fixing member includes

[0030] A screw, wherein the hollow section is provided with an arcuate groove, one end of the screw is connected to the blocking plate, and the other end extends out of the arcuate groove;

[0031] A fixing nut is threadably connected to the screw rod, the fixing nut can abut against the hollow section, and the fixing nut is located above the hollow section.

[0032] By adopting the above technical solution, the fixing piece is designed, and the position of the blocking plate can be fixed by cooperating with the screw and the fixing nut.

[0033] In a specific embodiment, the liquid supply unit includes

[0034] A temporary storage barrel, wherein the temporary storage barrel is hollow;

[0035] Two infusion tubes, one end of which is connected to the bottom wall of the temporary storage bucket, and the other end is connected to the cavity wall of the fluid infusion cavity, and a one-way valve is installed on the infusion tube to allow the liquid to flow from the temporary storage bucket to the fluid infusion cavity in one direction.

[0036] By adopting the above technical solution, the designed liquid supply unit can replenish liquid into the liquid infusion cavity while the separating plug is in motion, through the cooperation of the temporary storage barrel and the liquid infusion tube.

[0037] In a specific embodiment, the housing tube includes

[0038] A straight section, the aeration disc is arranged at the bottom of the straight section, and the liquid supply unit is connected to the straight section;

[0039] The flared section is coaxially connected to the end of the straight section away from the aeration plate, and the inner diameter of the flared section gradually increases from the end close to the aeration plate to the end close to the slag discharge plate.

[0040] By adopting the above technical solution, the designed receiving cylinder can facilitate the discharge of the upper layer of waste emulsion mixed with scum to the outside of the receiving cylinder through the flared section.

[0041] In a specific embodiment, the outer peripheral side of the expansion section is connected to an annular slag receiving groove, the top of the annular slag receiving groove is open, and a return liquid pipe is connected between the annular slag receiving groove and the accommodating cylinder, and the return liquid pipe is filled with a filter body.

[0042] By adopting the above technical solution, the designed annular slag receiving trough and liquid return pipe can realize the reuse of waste emulsion and reduce the waste of waste emulsion in the solid-liquid separation process.

[0043] In a second aspect, the present application provides a method for solid-liquid separation of waste emulsion based on flotation method, comprising:

[0044] S1: Initial refilling: Add waste emulsion into the holding tube so that the height difference between the liquid level of the waste emulsion and the horizontal plane of the top wall of the holding tube is 1-5 cm;

[0045] S2: Aeration: Gas is introduced into the waste emulsion in the container through the aeration plate to form bubbles, which bring solid particles or pollutants in the waste emulsion to the surface of the waste emulsion, forming scum or oil floating;

[0046] S3: Slag discharge and liquid replenishment: The mounting ring drives the slag discharge plate to rotate, and the slag discharge plate moves the slag or floating oil on the surface of the waste emulsion in the receiving tube until the slag or floating oil is discharged out of the receiving tube; at the same time, the mounting ring drives the separation plug to rise and fall back through the linkage unit to replenish the waste emulsion into the receiving tube to maintain the liquid level in the receiving tube.

[0047] By adopting the above technical solution, the slag discharge action of the slag discharge plate can be linked with the liquid replenishment action of the waste emulsion in the receiving tube, so that the liquid level in the receiving tube remains roughly unchanged, thereby improving the solid-liquid separation efficiency.

[0048] In summary, this application includes at least one of the following beneficial technical effects:

[0049] 1. The designed waste emulsion solid-liquid separation device based on the flotation method can provide a working environment for solid-liquid separation through the receiving tube, and gas can be introduced into the waste emulsion through the aeration plate, thereby driving the solid particles in the waste emulsion to the surface to form scum. Through the cooperation of the liquid replenishment tube, the separation plug and the one-way liquid outlet valve, the waste emulsion in the receiving tube can be replenished by extracting waste emulsion from the liquid supply unit when the separation plug moves up and down, thereby maintaining the liquid level in the receiving tube and improving the solid-liquid separation efficiency; through the installation ring, the slag plate and the linkage unit, the correlation between the slag discharge of the slag plate and the movement of the separation plug can be achieved, thereby reducing the possibility of excessive liquid replenishment.

[0050] 2. The designed waste emulsion solid-liquid separation device based on the flotation method uses a cylinder to drive the screw rod to move back and forth. The spiral depression and the columnar protrusion cooperate to realize the rotation of the mounting ring, thereby completing the discharge of the scum.

[0051] 3. The designed waste emulsion solid-liquid separation device based on flotation method can divide the inner cavity of the liquid replenishment cylinder into two liquid replenishment chambers through the hollow section. The connection size of the adjustment hole can be changed through the sealing plate, and then on the basis of the same hollow section stroke, the volume of the waste emulsion in the liquid replenishment chamber entering the holding cylinder is changed, avoiding the possibility of waste emulsion being wasted due to the large gap between the amount of liquid pushed out by the slag discharge plate and the amount of liquid replenished. The sealing plate is conveniently fixed by the fixing parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a structural schematic diagram of the containing cylinder and aeration plate in Example 1 of the present application.

[0053] Figure 2 It is along Figure 1 Sectional view along line AA.

[0054] Figure 3 It is a structural schematic diagram of the waste emulsion solid-liquid separation device based on the flotation method in Example 1 of the present application.

[0055] Figure 4 yes Figure 3 sectional view of .

[0056] Figure 5 yes Figure 4 A magnified schematic diagram of part A.

[0057] Figure 6 This is a schematic structural diagram of the partition plug in Example 1 of the present application.

[0058] Figure 7 Example 2 of the present application is a schematic structural diagram of a waste emulsion solid-liquid separation device based on flotation method.

[0059] Figure 8 yes Figure 7 An enlarged schematic diagram of part B.

[0060] Explanation of the accompanying symbols: 1. Accommodating cylinder; 11. Aeration plate; 12. Fixing frame; 13. Mounting ring; 131. Columnar protrusion; 14. Slag discharge plate; 15. Straight tube section; 16. Expanding section; 2. Liquid replenishing cylinder; 21. Liquid replenishing chamber; 22. One-way liquid outlet valve; 3. Separating plug; 31. Hollow section; 311. Adjusting hole; 312. Arc groove; 32. Sealing plate; 33. Fixing part; 331. Screw; 332. Fixing nut; 4. Liquid supply unit; 41. Temporary storage barrel; 42. Liquid infusion tube; 43. One-way valve; 5. Linkage unit; 51. Piston rod; 52. Linkage rod; 53. Annular lifting groove; 54. Cylinder; 55. Screw rod; 551. Spiral depression; 6. Annular slag receiving groove; 7. Liquid return pipe. DETAILED DESCRIPTION

[0061] The following is combined with Figure 1-8 This application is described in further detail.

[0062] The embodiments of the present application disclose a device and method for solid-liquid separation of waste emulsion based on flotation.

[0063] In a first aspect, an embodiment of the present application discloses a waste emulsion solid-liquid separation device based on flotation.

[0064] Example 1

[0065] Reference Figure 1A waste emulsion solid-liquid separation device based on flotation method includes a containing cylinder 1 and an aeration plate 11. The containing cylinder 1 is hollow and has an opening at the top. The aeration plate 11 is arranged at the bottom of the containing cylinder 1 and is located in the inner cavity of the containing cylinder 1. A plurality of air outlets are provided on the aeration plate 11, and the aeration plate 11 is connected to an air pump through an air supply pipe. The air pump inputs gas into the aeration plate 11 through the air supply pipe, and the gas enters the waste emulsion in the containing cylinder 1 through the air outlet holes.

[0066] Reference Figure 2 The aeration plate 11 passes gas in the waste emulsion into the aeration plate 11 to form bubbles, which incorporate the solid particles in the waste emulsion and float them to the upper layer of the waste emulsion. In order to facilitate the discharge of the scum to the outside of the accommodating tube 1, it also includes a fixing frame 12, a mounting ring 13 and at least one slag discharge plate 14. The fixing frame 12 is welded and fixed to the accommodating tube 1, and the mounting ring 13 is coaxially arranged with the accommodating tube 1, and the mounting ring 13 is arranged near the upper end opening of the accommodating tube 1. The mounting ring 13 and the fixing frame 12 are rotatably connected by a bearing, and the slag discharge plate 14 is welded to the outer peripheral side of the mounting ring 13. In this application, the number of slag discharge plates 14 can be one, two or three, as long as the upper layer of slag in the liquid in the accommodating tube 1 can be discharged. In this embodiment, the number of slag discharge plates 14 is four, and the four slag discharge plates 14 are evenly distributed along the circumference of the mounting ring 13; in this embodiment, a driving motor is bolted to the fixing frame 12, and the output shaft of the driving motor is connected to the mounting ring 13 to drive the mounting ring 13 to rotate.

[0067] Reference Figure 3 In order to facilitate the discharge of slag, the containing tube 1 includes a straight section 15 and a flared section 16. The flared section 16 is coaxially welded and fixed above the straight section 15, and the inner diameter of the flared section 16 gradually increases from the side close to the aeration plate 11 to the side close to the slag discharge plate 14.

[0068] Reference Figure 3 In order to reduce the waste of waste emulsion, an annular slag receiving groove 6 is welded on the outer peripheral side of the expansion section 16. The top of the annular slag receiving groove 6 is opened, and the outer edge of the expansion section 16 is projected into the annular slag receiving groove 6. A return liquid pipe 7 is connected between the annular slag receiving groove 6 and the accommodating cylinder 1 through a flange. The return liquid pipe 7 is filled with a filter body. In this application, the filter body can be a filter sponge or other materials that can achieve filtration.

[0069] Reference Figure 4Since a portion of the waste emulsion will inevitably be brought out during the slag discharge process, the liquid level in the accommodating cylinder 1 will drop, affecting the solid-liquid separation efficiency. In order to reduce this effect, a liquid replenishing cylinder 2 and a separating plug 3 are also included. The liquid replenishing cylinder 2 is hollow, and the upper cover of the liquid replenishing cylinder 2 is detachably fixed to the main body of the liquid replenishing cylinder 2; the liquid replenishing cylinder 2 is welded and fixed to the accommodating cylinder 1, the liquid replenishing cylinder 2 is located in the accommodating cylinder 1, the separating plug 3 is located in the inner cavity of the liquid replenishing cylinder 2, and the separating plug 3 is slidably connected to the liquid replenishing cylinder 2, and the inner cavity of the liquid replenishing cylinder 2 is divided into two upper and lower liquid replenishing chambers 21, and a one-way liquid outlet valve 22 is flange-connected to the cavity wall of the liquid replenishing chamber 21, which is used to replenish the liquid in the liquid replenishing chamber 21 into the accommodating cylinder 1.

[0070] Reference Figure 4 In order to facilitate the supply of waste emulsion to the liquid infusion chamber 21, a liquid supply unit 4 is also included. The liquid supply unit 4 includes a temporary storage barrel 41 and two liquid infusion tubes 42. One end of the liquid infusion tube 42 extends into the inner cavity of the temporary storage barrel 41, and the other end passes through the cavity wall of the liquid infusion chamber 21 and extends into the liquid infusion chamber 21. A one-way valve 43 is connected to the flange of the liquid infusion tube 42 to allow the liquid in the temporary storage barrel 41 to flow into the liquid infusion chamber 21 in one direction.

[0071] Reference Figure 5 In order to facilitate the linkage of the slag discharge action of the slag discharge plate 14 and the reciprocating lifting action of the partition plug 3, a linkage unit 5 is also included. The linkage unit 5 includes a piston rod 51 and two linkage rods 52. One end of the piston rod 51 is welded to the partition plug 3, and the other end is extended into the hollow cavity of the mounting ring 13. The linkage rod 52 is welded to the outer peripheral side of the piston rod 51, and the two linkage rods 52 are evenly distributed around the circumference of the piston rod 51. An annular lifting groove 53 is welded on the inner cavity wall of the mounting ring 13. The annular lifting groove 53 is in the shape of a sine or cosine wave when expanded. The end of the linkage rod 52 away from the piston rod 51 extends into the annular lifting groove 53. When the mounting ring 13 rotates, the reciprocating lifting action of the piston rod 51 is realized through the cooperation of the annular lifting groove 53 and the linkage rod 52.

[0072] Reference Figure 6 Since the dimensions of the accommodating cylinder 1 and the fluid replenishing cylinder 2 cannot be modified once they are manufactured and formed, the drainage speed of the slag discharge plate 14 and the fluid replenishing speed may be inconsistent. Therefore, the partition plug 3 includes a hollow section 31, a sealing plate 32 and a fixing member 33. The outer peripheral side of the hollow section 31 is slidably connected to the inner cavity wall of the fluid replenishing cylinder 2 through a rubber sealing ring. The interior of the hollow section 31 is hollow, and the upper and lower layers of the inner cavity of the hollow section 31 are provided with adjustment holes 311. The number of the adjustment holes 311 is at least one. In this application, the number of the adjustment holes 311 is four, and the four adjustment holes 311 are evenly distributed around the circumference.

[0073] Reference Figure 6In order to change the size of the open flow channel of the adjustment hole 311, the sealing plate 32 is located in the inner cavity of the hollow section 31, and the sealing plate 32 is rotatably connected to the hollow section 31. A plurality of through holes are provided on the sealing plate 32. In this application, the number of through holes on the sealing plate 32 is consistent with the number of the adjustment holes 311. After the sealing plate 32 is rotated, the flow channel size of the adjustment hole 311 can be changed; the fixing part 33 includes a screw 331 and a fixing nut 332. An arc groove 312 is provided on the upper part of the hollow section 31. One end of the screw 331 is welded and fixed to the sealing plate 32, and the other end extends out of the arc groove 312. The fixing nut 332 is threadedly connected to the screw 331, and the fixing nut 332 is located above the hollow section 31 and can be tightly pressed against the hollow section 31.

[0074] The implementation principle of the waste emulsion solid-liquid separation device based on the flotation method in Example 1 of the present application is: pour the waste emulsion into the containing cylinder 1 until the waste emulsion is flush with the upper edge of the flared section 16, and then input air into the aeration plate 11 through an air pump. The air in the aeration plate 11 passes into the waste emulsion through the air outlet, and forms bubbles to drive the solid particles in the waste emulsion to the surface of the waste emulsion. At this time, the driving motor drives the slag discharge plate 14 to rotate through the mounting ring 13 to discharge the slag into the annular slag receiving trough 6. The waste emulsion brought out is filtered through the filter body and then re-enters the containing cylinder 1.

[0075] At the same time, open the upper cover of the fluid infusion cylinder 2, adjust the screw 331, so that the open flow channel size of the adjustment hole 311 is appropriate, and the rotation of the mounting ring 13 drives the annular lifting groove 53 to rotate. The annular lifting groove 53 cooperates with the linkage rod 52 to drive the piston rod 51 to move back and forth. The piston rod 51 drives the separating plug 3 to move, and cooperates with the temporary storage barrel 41, the infusion tube 42, the one-way liquid outlet valve 22 and the liquid outlet valve, so that the waste emulsion in the temporary storage barrel 41 enters the receiving barrel 1, so that the liquid level in the receiving barrel 1 is stable.

[0076] Example 2

[0077] Reference Figure 7 and Figure 8 The difference between this embodiment and embodiment 1 is that the linkage unit 5 includes a cylinder 54 and a screw rod 55. The cylinder body of the cylinder 54 is bolted to the fixing frame 12. One end of the screw rod 55 is connected to the piston rod 51 of the cylinder 54 through a coupling, and the other end passes through the mounting ring 13 and is connected to the partition plug 3. A spiral recess 551 is provided on the outer circumference of the extending section of the screw rod 55 extending out of the infusion cylinder 2, and a columnar protrusion 131 adapted to the spiral recess 551 is welded on the inner circumference of the mounting ring 13. Through the cooperation between the spiral recess 551 and the columnar protrusion 131, when the screw rod 55 is lifted or lowered, the mounting ring 13 rotates forward and backward.

[0078] The implementation principle of the waste emulsion solid-liquid separation device based on the flotation method in Example 2 of the present application is: pour the waste emulsion into the containing tube 1 until the waste emulsion is flush with the upper edge of the flared section 16, and then input air into the aeration plate 11 through an air pump. The air in the aeration plate 11 passes into the waste emulsion through the air outlet, and forms bubbles to drive the solid particles in the waste emulsion to the surface of the waste emulsion. At this time, the cylinder 54 drives the mounting ring 13 to rotate through the spiral recess 551 on the screw rod 55 and the columnar protrusion 131 on the mounting ring 13, and the mounting ring 13 drives the slag discharge plate 14 to rotate to discharge the slag into the annular slag receiving groove 6. The waste emulsion brought out is filtered through the filter body and then re-enters the containing tube 1.

[0079] At the same time, the upper cover of the fluid infusion cylinder 2 is opened, and the screw 331 is adjusted so that the open flow channel of the adjustment hole 311 is of appropriate size. The screw 55 drives the partition plug 3 to move, and cooperates with the temporary storage barrel 41, the infusion tube 42, the one-way liquid outlet valve 22 and the liquid outlet valve to allow the waste emulsion in the temporary storage barrel 41 to enter the receiving barrel 1, so that the liquid level in the receiving barrel 1 is stabilized.

[0080] In the second aspect, the embodiment of the present application discloses a solid-liquid separation method of waste emulsion based on flotation method, which adopts the solid-liquid separation device of waste emulsion based on flotation method disclosed in the embodiment of the first aspect of the present application, comprising:

[0081] S1: Initial refilling: Add waste emulsion into the container 1 so that the height difference between the liquid level of the waste emulsion and the horizontal plane of the top wall of the container 1 is 1-5 cm;

[0082] S2: Aeration: Gas is introduced into the waste emulsion in the container 1 through the aeration plate 11 to form bubbles, which bring solid particles or pollutants in the waste emulsion to the surface of the waste emulsion, forming scum or oil floating;

[0083] S3: Slag discharge and liquid replenishment: The mounting ring 13 drives the slag discharge plate 14 to rotate, and the slag discharge plate 14 moves the slag or floating oil on the surface of the waste emulsion in the receiving tube 1 until the slag or floating oil is discharged to the outside of the receiving tube 1; at the same time, the mounting ring 13 drives the partition plug 3 to rise and fall back through the linkage unit 5 to replenish the waste emulsion into the receiving tube 1 to maintain the liquid level in the receiving tube 1.

[0084] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A solid-liquid separation device for waste emulsion based on flotation method, characterized by: include A accommodating cylinder (1), wherein the top of the accommodating cylinder (1) is open, and an aeration plate (11) is provided at the bottom of the accommodating cylinder (1), and the aeration plate (11) is used to introduce gas into the liquid in the accommodating cylinder (1); A fixing frame (12), wherein a mounting ring (13) is rotatably connected to the fixing frame (12), and at least one slag discharge plate (14) is connected to the circumference of the mounting ring (13), and the slag discharge plate (14) is used to move the upper layer of slag in the containing cylinder (1); A fluid infusion cylinder (2), the fluid infusion cylinder (2) being hollow and connected to the inner cavity of the accommodating cylinder (1), and a partition plug (3) being slidably connected to the inner cavity of the fluid infusion cylinder (2), the partition plug (3) dividing the inner cavity of the fluid infusion cylinder (2) into two fluid infusion chambers (21), and a one-way liquid outlet valve (22) being connected to the cavity wall of the fluid infusion chamber (21); a liquid supply unit (4), the liquid supply unit (4) being connected to the two liquid replenishing chambers (21); a linkage unit (5), the linkage unit (5) being connected to the fixing frame (12), and the linkage unit (5) being connected to the slag discharge plate (14), and being used for causing the partition plug (3) to reciprocate in the liquid replenishing cylinder (2) to cooperate with the liquid supply unit (4) to replenish the waste emulsion into the receiving cylinder (1); The linkage unit (5) comprises A piston rod (51), the piston rod (51) is connected to the separation plug (3), and the piston rod (51) extends into the mounting ring (13); Two linkage rods (52), the linkage rods (52) are connected to the piston rod (51), and the two linkage rods (52) are evenly distributed horizontally around the piston rod (51); the mounting ring (13) is connected to an annular lifting groove (53), and the linkage rods (52) extend into the annular lifting groove (53); Or the linkage unit (5) includes a cylinder (54), wherein the cylinder (54) is connected to the fixing frame (12); A spiral rod (55), one end of which is connected to the piston rod (51) of the cylinder (54), and the other end of which passes through the mounting ring (13) and is connected to the partition plug (3), the outer peripheral side of the extended section of the spiral rod (55) extending out of the fluid infusion cylinder (2) is integrally connected with a spiral recess (551), and a columnar protrusion (131) adapted to the spiral recess (551) is provided in the mounting ring (13).

2. The waste emulsion solid-liquid separation device based on air flotation method according to claim 1, characterized in that: The partition plug (3) comprises A hollow section (31), wherein the outer peripheral side of the hollow section (31) is slidably connected to the inner cavity wall of the fluid infusion cylinder (2), the interior of the hollow section (31) is hollow, and an adjustment hole (311) is opened on the hollow section (31), and the adjustment hole (311) can connect the two fluid infusion chambers (21); a blocking plate (32), the blocking plate (32) being located in the inner cavity of the hollow section (31), the blocking plate (32) being rotatably connected to the hollow section (31), the blocking plate (32) being provided with a plurality of through holes, and the blocking plate (32) being able to change the opening and closing state of the regulating hole (311) after rotation; A fixing member (33) is installed on the hollow section (31), and the fixing member (33) is connected to the blocking plate (32) for fixing the blocking plate (32).

3. The waste emulsion solid-liquid separation device based on air flotation method according to claim 2, characterized in that: The fixing member (33) includes A screw rod (331), wherein an arcuate groove (312) is provided on the hollow section (31), one end of the screw rod (331) is connected to the blocking plate (32), and the other end extends out of the arcuate groove (312); A fixing nut (332) is threadedly connected to the screw rod (331), the fixing nut (332) can abut against the hollow section (31), and the fixing nut (332) is located above the hollow section (31).

4. The waste emulsion solid-liquid separation device based on air flotation method according to claim 1, characterized in that: The liquid supply unit (4) includes A temporary storage bucket (41), wherein the temporary storage bucket (41) is hollow; Two infusion tubes (42), one end of each infusion tube (42) is connected to the bottom wall of the temporary storage barrel (41), and the other end is connected to the wall of the fluid infusion chamber (21), and a one-way valve (43) is installed on each infusion tube (42) for allowing the liquid to flow from the temporary storage barrel (41) to the fluid infusion chamber (21) in one direction.

5. The waste emulsion solid-liquid separation device based on air flotation method according to claim 1, characterized in that: The accommodating cylinder (1) comprises A straight section (15), the aeration disc (11) is arranged at the bottom of the straight section (15), and the liquid supply unit (4) is connected to the straight section (15); A flared section (16) is coaxially connected to an end of the straight section (15) away from the aeration plate (11), and the inner diameter of the flared section (16) gradually increases from an end close to the aeration plate (11) to an end close to the slag discharge plate (14).

6. The waste emulsion solid-liquid separation device based on air flotation method according to claim 5, characterized in that: The outer peripheral side of the expanded section (16) is connected to an annular slag receiving groove (6), the top of the annular slag receiving groove (6) is open, and a return liquid pipe (7) is connected between the annular slag receiving groove (6) and the accommodating cylinder (1), and the return liquid pipe (7) is filled with a filter body.

7. A solid-liquid separation method for waste emulsion based on flotation method, characterized in that: The waste emulsion solid-liquid separation device based on the flotation method according to any one of claims 1 to 6 is used, comprising S1: Initial refilling: adding waste emulsion into the holding tube (1) so that the height difference between the liquid level of the waste emulsion and the horizontal plane of the top wall of the holding tube (1) is 1-5 cm; S2: Aeration: gas is introduced into the waste emulsion in the container (1) through the aeration plate (11) to form bubbles, which bring solid particles or pollutants in the waste emulsion to the surface of the waste emulsion to form scum or oil floating; S3: Slag discharge and liquid replenishment: The mounting ring (13) drives the slag discharge plate (14) to rotate, and the slag discharge plate (14) moves the slag or oil on the surface of the waste emulsion in the receiving tube (1) until the slag or oil is discharged to the outside of the receiving tube (1); at the same time, the mounting ring (13) drives the separation plug (3) to rise and fall back and forth through the linkage unit (5), replenishing the waste emulsion into the receiving tube (1) to maintain the liquid level in the receiving tube (1).

Images