An apparatus and method for treating oil-containing sludge

Abstract

The present application relates to sludge treatment device technical field, specifically to a kind of oily sludge treatment device and method, wherein the oily sludge treatment device includes rack, rotary drum, drum body, separation mechanism, spiral blade, discharge mechanism and driving mechanism;The present application is separated into first separation cavity and second separation cavity by setting separation mechanism, and second separation cavity is separated into inner cavity and outer cavity, which are separated from each other, and the liquid in inner cavity and outer cavity is separated from each other during liquid discharge and the process of liquid flowing to discharge pipe, and will not be mixed again, solve the problem of two liquid phases in the prior art three-phase horizontal screw machine is not completely separated, the treatment effect is better, and efficiency is higher.In addition, the treatment effect and efficiency of the treatment device can also be adjusted according to the composition of oily sludge, and the universality is strong.The oil phase and water phase separated by the oily sludge treatment method proposed by the present application have high purity, which is convenient for subsequent resource utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge treatment device, and particularly relates to a treatment device and method for oily sludge. BACKGROUND

[0002] With the rapid advancement of urbanization process in China and the increasingly strict environmental protection policy, the harmless, reduction and resource treatment of various wastes has become an important direction for the development of advanced environmental protection industry. Oily sludge (such as kitchen waste) as a typical difficult-to-treat waste, if using traditional landfill, composting or incineration method, not only cannot effectively recycle resources, but also has the risk of polluting soil and groundwater, which violates the requirements of environmental protection policy and limits the development of environmental protection industry. Under this background, three-phase horizontal screw centrifuge has been widely used. Through the centrifugal field generated by high-speed rotation, it can realize one-step separation of solid residues and two kinds of liquid with different densities (such as oil and water) in the mixture, and simultaneously collect solid phase, light liquid phase and heavy liquid phase, which significantly improves the resource recycling efficiency and reduces the risk of water environmental pollution.

[0003] However, in the process of treating oily sludge by the existing three-phase horizontal screw centrifuge, the separated light liquid phase and heavy liquid phase are prone to re-mixing due to flow direction mutation or unstable fluid interface during the liquid discharge stage and the liquid flow and delivery stage to the outlet, resulting in mixing of water phase in oil phase or oil phase in water phase, poor separation effect, the need for secondary separation, and the influence on the efficiency of subsequent processing of light liquid phase. The heavy liquid phase still has the problem of environmental pollution when discharged. In addition, the existing equipment has poor adaptability to changes in the properties of the treated material. When the oil content, water content and solid content of the treated oily sludge fluctuate greatly, the treatment effect is obviously poor, and there is a problem of insufficient universality, which is difficult to meet the requirements of advanced environmental protection industry for efficient and stable operation of the treatment equipment. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a treatment device and method for oily sludge, which solves the problems of incomplete separation of two liquid phases in the sludge treatment device in the prior art, and the inability to adapt the treatment effect according to the composition of the treated material.

[0005] The treatment device and method for oily sludge of the present application adopt the following technical scheme, which comprises:

[0006] a rack;

[0007] a rotating drum extending in the horizontal direction and rotatingly installed on the rack, a material conveying port being formed in the peripheral wall of the middle part of the rotating drum;

[0008] The drum body comprises a first drum and a second drum; the first drum is barrel-shaped, and the second drum is cone-shaped; the two are coaxially arranged and fixedly connected; the large end of the second drum faces the open end of the first drum; the material inlet is opposite to one end of the second drum close to the first drum; a slag discharge hole is arranged on the peripheral wall of the end of the second drum away from the first drum;

[0009] The separation mechanism is arranged at the end of the second drum away from the first drum, and is used for separating the drum body into a first separation cavity and a second separation cavity in the axial direction, and separating the second separation cavity into an inner cavity and an outer cavity; the inner cavity and the outer cavity are both in communication with the first separation cavity;

[0010] The spiral blade is fixedly connected to the outer wall of the rotating drum and arranged in the first separation cavity; the outer periphery of the spiral blade is in contact with the inner wall of the drum body, and the spiral blade is spaced apart and provided with a plurality of conveying holes along the extension direction thereof;

[0011] The discharge mechanism is used for discharging the materials in the inner cavity and the outer cavity from the drum body, respectively;

[0012] The driving mechanism is used for driving the drum body and the rotating drum to rotate at different speeds.

[0013] Optionally, the separation mechanism comprises a separation ring and a first separation cylinder; the separation ring is located at the end of the second drum away from the first drum, coaxially arranged with the drum body, and fixedly connected to the drum body; the inner diameter of the separation ring is greater than the outer diameter of the rotating drum, and the outer diameter of the separation ring is less than the inner diameter of the drum body;

[0014] The first separation cylinder is fixedly connected to the separation ring and located in the second separation cavity; the inner diameter of the first separation cylinder is greater than the inner diameter of the separation ring, and the outer diameter of the first separation cylinder is less than the outer diameter of the separation ring; the first separation cylinder separates the second separation cavity into the inner cavity and the outer cavity.

[0015] Optionally, the first drum comprises a connecting cylinder and a moving barrel; the two are coaxially arranged; one end of the connecting cylinder is fixedly connected to the large end of the second drum; the moving barrel is axially movably connected to the end of the connecting cylinder away from the second drum; the separation mechanism further comprises a second separation cylinder; the second separation cylinder is fixedly connected to the moving barrel; the inner diameter of the second separation cylinder is greater than the inner diameter of the separation ring, and the outer diameter of the second separation cylinder is less than the outer diameter of the separation ring; the second separation cylinder is sealingly connected with the first separation cylinder; the moving barrel is connected with a distance adjusting mechanism; the distance adjusting mechanism is used for driving the moving barrel to axially move.

[0016] Optionally, the inner wall of the first separator abuts against the outer wall of the second separator, and the two are sealed together; the peripheral walls of both the first and second separators are provided with multiple liquid guiding holes, which are distributed at intervals along the axial direction of the first or second separator; the first separator is fixedly connected with multiple first liquid guiding cones, the large ends of which are respectively connected to multiple liquid guiding holes on the first separator, and the small ends extend into the outer cavity; the second separator is fixedly connected with multiple second liquid guiding cones, the large ends of which are respectively connected to multiple liquid guiding holes on the second separator, and the small ends extend into the inner cavity.

[0017] Optionally, the distance adjustment mechanism includes a lead screw, a moving block, and a handwheel; the lead screw is rotatably mounted on the frame, the moving block is fixedly connected to the moving barrel, and is threadedly connected to the lead screw; the handwheel and the lead screw are driven by gears.

[0018] Optionally, the discharge mechanism includes a discharge pipe, a first corrugated pipe, and a second corrugated pipe;

[0019] The drain pipe is fixedly connected to the end of the frame away from the second drum; the drain pipe has a first drain channel and a second drain channel.

[0020] The first corrugated pipe and the second corrugated pipe are coaxially arranged, with one end of each fixedly connected to the drain pipe and the other end fixedly connected to the movable tank; the first drain channel is connected to the first corrugated pipe, and the second drain channel is connected to the second corrugated pipe.

[0021] The movable barrel has a first flow channel and a second flow channel; the two ends of the first flow channel are connected to the inner cavity and the first corrugated pipe, respectively; the two ends of the second flow channel are connected to the outer cavity and the second corrugated pipe, respectively.

[0022] Optionally, the frame is fixedly connected to a feed pipe, which is coaxially arranged inside the rotating drum, with one end extending out of the rotating drum and the other end facing the feed port.

[0023] Optionally, the drive mechanism includes a first motor, a drive wheel, a driven wheel, and a belt; the driven wheel is synchronously connected to the drum body, the first motor is mounted on the frame, and the drive wheel is synchronously connected to the output end of the first motor; the belt is sleeved on the drive wheel and the driven wheel to transmit power from the drive wheel to the driven wheel.

[0024] Optionally, the drive mechanism further includes a second motor, a reducer, a coupling, and a rotating shaft; the second motor is mounted on the frame, the input end of the reducer is connected to the output end of the second motor, and the output end of the reducer is connected to the rotating shaft via the coupling; the rotating shaft is fixedly connected to the rotating drum.

[0025] This invention provides a method for treating oily sludge, comprising the following steps:

[0026] S1: Place the material in the crusher for crushing;

[0027] S2: Pour the crushed material into a high-level buffer tank for homogenization;

[0028] S3: The homogenized material is injected through the feed pipe into the rotary drum of an oily sludge treatment device;

[0029] S4: Start the drive mechanism of an oily sludge treatment device to separate the material into three phases: oil, water, and solid through centrifugal action.

[0030] The beneficial effects of this invention are as follows: The oily sludge treatment device of this invention divides the drum body into a first separation chamber and a second separation chamber by setting a separation mechanism, and further divides the second separation chamber into an inner chamber and an outer chamber that are separated from each other. When the liquid enters the second separation chamber from the first separation chamber, it remains in a stratified state. Therefore, the liquid flow in the first separation chamber will not disturb the liquid in the second separation chamber. Moreover, the liquid in the inner chamber and the liquid in the outer chamber are separated from each other. Therefore, during the discharge process, the two liquids will not mix again, and the separation of the two liquids is more thorough. No secondary separation is required, which solves the problem of incomplete separation of the two liquid phases in the existing three-phase horizontal screw press. The treatment effect is better and the efficiency is higher.

[0031] Furthermore, the first drum includes a connecting cylinder and a moving barrel; the moving barrel moves axially and is connected to a distance adjustment mechanism; when the properties of the separated material change, the water phase discharged from the drum body may contain a portion of the oil phase, or the oil phase may contain a portion of the water phase, resulting in poor treatment effect. The operator can adjust the position of the moving barrel according to the state of the discharged liquid through the distance adjustment mechanism, so that the moving barrel is away from the connecting cylinder. During the movement of the moving barrel, the axial length of the inner and outer cavities increases, and the travel distance of the liquid in the inner and outer cavities increases, so that the liquid entering the inner and outer cavities has sufficient time to stratify and form a stable concentric liquid ring, thereby optimizing the treatment effect. This invention can be adapted to oily sludge with different oil-water ratios and has better universality compared with the three-phase horizontal screw press in the prior art.

[0032] Furthermore, the first and second partition cylinders between the inner and outer cavities are respectively provided with a first liquid guiding cone and a second liquid guiding cone for liquid to pass through. Multiple first and second liquid guiding cones are provided and distributed at intervals along the axial direction of the rotating cylinder. The oil phase entering the outer cavity can enter the inner cavity through the second liquid guiding cone, and the water phase entering the inner cavity can enter the outer cavity through the first liquid guiding cone. As the moving tank moves away from the partition ring, not only does the flow path of the liquid in the inner and outer cavities increase, but the number of exposed first and second liquid guiding cones also increases simultaneously. The oil phase entering the outer cavity can enter the inner cavity more quickly through the second liquid guiding cone, and the water phase entering the inner cavity can enter the outer cavity more quickly through the first liquid guiding cone, further optimizing the treatment effect and improving the treatment efficiency.

[0033] The present invention discloses a method for treating oily sludge, which utilizes an oily sludge treatment device of the present invention to treat the oily sludge, resulting in oil and water phases with higher purity, facilitating subsequent resource utilization. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of an oily sludge treatment device according to the present invention;

[0036] Figure 2 This is an exploded structural diagram of an oily sludge treatment device according to the present invention.

[0037] Figure 3 This is a top view of an oily sludge treatment device according to the present invention;

[0038] Figure 4 for Figure 3 Sectional view of section AA;

[0039] Figure 5 for Figure 4 Enlarged view at point X;

[0040] Figure 6 This invention provides an oily sludge treatment device. Figure 4 Sectional view of section BB;

[0041] Figure 7 for Figure 6 Enlarged view of the Y-axis.

[0042] In the picture:

[0043] 100. Frame; 110. Feed pipe;

[0044] 200. Rotary drum; 210. Feed inlet;

[0045] 300. Drum body; 310. First drum; 311. Connecting cylinder; 312. Moving bucket; 320. Second drum; 321. Slag discharge hole;

[0046] 400, Separating mechanism; 401, Inner cavity; 402, Outer cavity; 410, Spacer ring; 420, First separating cylinder; 430, Second separating cylinder;

[0047] 500, Spiral blade; 510, Conveying port;

[0048] 600. Discharge mechanism; 610. Drain pipe; 620. First corrugated pipe; 630. Second corrugated pipe;

[0049] 700. Drive mechanism; 710. Drive wheel; 720. Driven wheel; 730. Belt; 740. First motor; 750. Second motor; 760. Reducer; 770. Coupling; 780. Shaft;

[0050] 800. Distance adjustment mechanism; 810. Lead screw; 820. Moving block; 830. Handwheel. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] like Figures 1 to 7 As shown, an embodiment of the present invention provides an oily sludge treatment device including a frame 100, a rotating drum 200, a rotating drum body 300, a separating mechanism 400, a spiral blade 500, a discharge mechanism 600, and a drive mechanism 700.

[0053] 100 racks;

[0054] The rotating drum 200 extends horizontally and is rotatably mounted on the frame 100. A feeding port 210 is provided on the peripheral wall of the middle part. The frame 100 is fixedly connected to a feeding pipe 110, which is coaxially arranged inside the rotating drum 200. One end of the feeding pipe 110 extends out of the rotating drum 200, and the other end faces the feeding port 210.

[0055] The drum body 300 includes a first drum 310 and a second drum 320; the first drum 310 is barrel-shaped and the second drum 320 is conical; the two are coaxially arranged and fixedly connected; the large end of the second drum 320 faces the open end of the first drum 310; the feed inlet 210 is directly opposite the end of the second drum 320 that is close to the first drum 310; a slag discharge hole 321 is provided on the peripheral wall of the end of the second drum 320 away from the first drum 310;

[0056] The separating mechanism 400 is disposed at the end of the second drum 320 away from the first drum 310. The separating mechanism 400 is used to separate the drum body 300 into a first separating cavity and a second separating cavity in the axial direction, and to divide the second separating cavity into an inner cavity 401 and an outer cavity 402; both the inner cavity 401 and the outer cavity 402 are connected to the first separating cavity.

[0057] The spiral blade 500 is fixedly connected to the outer wall of the rotating drum 200 and is set in the first separation chamber; the outer periphery of the spiral blade 500 is in contact with the inner wall of the rotating drum body 300, and the spiral blade 500 is provided with multiple conveying holes 510 at intervals along its own extension direction.

[0058] The discharge mechanism 600 is used to discharge the materials in the inner cavity 401 and the outer cavity 402 into the drum body 300 respectively;

[0059] The drive mechanism 700 is used to drive the drum body 300 and the drum 200 to rotate at different speeds.

[0060] When treating oily sludge, the oily sludge is first crushed and homogenized, and then the homogenized sludge is injected into the feed pipe 110. The sludge extends from the feed pipe 110 into one end of the drum body 300 and enters the rotating drum 200. The drive mechanism 700 is started, and the drive mechanism 700 drives the drum body 300 and the rotating drum 200 to rotate at different speeds. When the rotating drum 200 rotates, it drives the spiral blades 500 to rotate synchronously.

[0061] The sludge in the rotating drum 200 enters the chamber between the rotating drum body 300 and the rotating drum 200 through the feed port 210. The high-speed rotation of the rotating drum body 300 causes the material in it to stratify according to density under the action of centrifugal force. The densest solid is thrown towards the inner wall of the first rotating drum 310 and the second rotating drum 320, the intermediate liquid (water phase) forms the middle layer, and the least dense liquid (oil phase) gathers in the innermost layer.

[0062] Because the drum body 300 and the drum 200 rotate at different speeds, the spiral blades 500 push the solids deposited on the inner wall of the drum body 300 toward the tip of the second drum 320 away from the first drum 310. During this process, the solids are squeezed and dehydrated, and the free liquid moves through the conveying holes 510 on the spiral blades 500 toward the end of the first drum 310 away from the second drum 320. The dehydrated solids are discharged from the second drum 320 through the slag discharge holes 321. Since the solids occupy the space of the second drum 320, after the liquid reaches the first separation chamber between the drum body 300 and the drum 200, it gradually moves toward the end of the first drum 310 away from the second drum 320. During the flow, the aqueous phase and the oil phase form concentric liquid rings in the first separation chamber, with the less dense liquid located inside the more dense liquid. As the liquid flows, the liquid reaches the second separation chamber. In this invention, the denser liquid enters the outer cavity 402, while the less dense liquid enters the inner cavity 401. The discharge mechanism 600 discharges the two liquids separately from the drum body 300. The present invention uses a separating mechanism 400 to divide the drum body 300 into a first separation cavity and a second separation cavity, further dividing the second separation cavity into a separate inner cavity 401 and an outer cavity 402. The liquid remains in a stratified state when entering the second separation cavity from the first separation cavity. Therefore, the liquid flow in the first separation cavity does not disturb the liquid in the second separation cavity. Furthermore, the liquid in the inner cavity 401 and the liquid in the outer cavity 402 are separated, so the two liquids do not mix again during discharge. This results in more thorough separation, eliminating the need for secondary separation and solving the problem of incomplete separation in existing three-phase horizontal screw presses. The process is more effective and efficient.

[0063] In a further embodiment, the separating mechanism 400 includes a partition ring 410 and a first separating cylinder 420. The partition ring 410 is located at the end of the second drum 320 away from the first drum 310. The partition ring 410 is coaxially arranged with the drum body 300 and fixedly connected to the drum body 300. The inner diameter of the partition ring 410 is larger than the outer diameter of the rotating cylinder 200, and the outer diameter of the partition ring 410 is smaller than the inner diameter of the drum body 300.

[0064] The first separator 420 is fixedly connected to the spacer ring 410 and is located inside the second separation chamber. The inner diameter of the first separator 420 is larger than the inner diameter of the spacer ring 410, and the outer diameter of the first separator 420 is smaller than the outer diameter of the spacer ring 410. The first separator 420 divides the second separation chamber into two parts: an inner cavity 401 and an outer cavity 402.

[0065] In a further embodiment, the first drum 310 includes a connecting cylinder 311 and a movable barrel 312; the two are coaxially arranged, one end of the connecting cylinder 311 is fixedly connected to the large end of the second drum 320; the movable barrel 312 is axially movable and connected to the end of the connecting cylinder 311 away from the second drum 320; the separating mechanism 400 also includes a second separating cylinder 430; the second separating cylinder 430 is fixedly connected to the movable barrel 312; the inner diameter of the second separating cylinder 430 is larger than the inner diameter of the spacer ring 410, and the outer diameter of the second separating cylinder 430 is smaller than the outer diameter of the spacer ring 410; the second separating cylinder 430 is sealed to the first separating cylinder 420; the movable barrel 312 is connected to a distance adjustment mechanism 800, which is used to drive the movable barrel 312 to move axially.

[0066] When treating oily sludge, the crushed and homogenized sludge is injected into the rotating drum 200, and the drive mechanism 700 is started. The drive mechanism 700 drives the rotating drum body 300 and the rotating drum 200 to rotate at different speeds. When the rotating drum 200 rotates, it drives the spiral blades 500 to rotate synchronously.

[0067] The sludge in the rotating drum 200 enters the chamber between the rotating drum body 300 and the rotating drum 200 through the feed port 210. Under the action of centrifugal force, the solid and two liquids with different densities are stratified in the radial direction of the rotating drum body 300. The denser solid contacts the inner wall of the first rotating drum 310 and the second rotating drum 320, the less dense liquid contacts the outer wall of the rotating drum 200, and the denser liquid is located between the solid and the less dense liquid.

[0068] Driven by the helical blades 500, the solids move towards the tip of the second drum 320 away from the tip of the first drum 310 and are discharged from the second drum 320 through the slag discharge hole 321. Since the solids occupy the space of the second drum 320, the liquids move towards the end of the first drum 310 away from the second drum 320 through the conveying holes 510 on the helical blades 500, and remain in a stratified state. The liquid with lower density is located inside the liquid with higher density. As the liquids flow, the liquid with higher density enters the outer cavity 402 through the gap between the partition ring 410 and the drum body 300; the liquid with lower density enters the inner cavity 401 through the gap between the partition ring 410 and the drum 200; and is discharged from the drum body 300 through the discharge mechanism 600.

[0069] When the properties of the separated material change, the aqueous phase discharged from the drum body 300 may contain a portion of the oil phase, or the oil phase may contain a portion of the aqueous phase. In this case, the treatment effect is poor. The operator can adjust the position of the moving barrel 312 according to the state of the discharged liquid through the distance adjustment mechanism 800, so that the moving barrel 312 is away from the connecting cylinder 311. During the movement of the moving barrel 312, the axial length of the inner cavity 401 and the outer cavity 402 increases, and the stroke of the liquid flowing in the inner cavity 401 and the outer cavity 402 increases, so that the liquid entering the inner cavity 401 and the outer cavity 402 has sufficient time to stratify and form a stable concentric liquid ring, thereby optimizing the treatment effect. This invention can be adapted to oily sludge with different oil-water ratios and has better universality compared with the three-phase horizontal screw press in the prior art.

[0070] In a further embodiment, the inner wall of the first partition cylinder 420 abuts against the outer wall of the second partition cylinder 430, and the two are sealed together; the peripheral walls of both the first partition cylinder 420 and the second partition cylinder 430 are provided with a plurality of liquid guiding holes, which are distributed at intervals along the axial direction of the first partition cylinder 420 or the second partition cylinder 430; the first partition cylinder 420 is fixedly connected with a plurality of first liquid guiding cones, the large ends of which are respectively connected to a plurality of liquid guiding holes on the first partition cylinder 420, and the small ends of which extend into the outer cavity 402; the second partition cylinder 430 is fixedly connected with a plurality of second liquid guiding cones, the large ends of which are respectively connected to a plurality of liquid guiding holes on the second partition cylinder 430, and the small ends of which extend into the inner cavity 401.

[0071] In the process of treating sludge with different oil-water ratios, when a portion of the oil phase enters the outer cavity 402, the oil phase in the outer cavity 402 forms a liquid ring on the inner side of the outer cavity 402 during the rotation of the rotating drum 200 and the drum body 300, and then enters the inner cavity 401 through the second guide cone; when a portion of the water phase enters the inner cavity 401, the water phase in the inner cavity 401 forms a liquid ring on the outer side of the inner cavity 401 during the rotation of the rotating drum 200 and the drum body 300, and then enters the outer cavity 402 through the first guide cone under pressure; thus, the separation of the two liquid phases is more thorough, further optimizing the treatment effect.

[0072] When the purity of the aqueous or oil phase discharged from the drum body 300 is low, the operator adjusts the position of the moving barrel 312 through the distance adjustment mechanism 800. The moving barrel 312 drives the second separator 430 to move, thereby increasing the number of exposed first and second liquid guide cones.

[0073] In a further embodiment, the distance adjustment mechanism 800 includes a lead screw 810, a moving block 820, and a handwheel 830; the lead screw 810 is rotatably mounted on the frame 100, the moving block 820 is fixedly connected to the moving barrel 312, and is threadedly connected to the lead screw 810; the handwheel 830 is driven by the lead screw 810 through gears.

[0074] When the water phase discharged from the drum body 300 contains a portion of the oil phase, or the oil phase contains a portion of the water phase, the handwheel 830 is turned. The handwheel 830 drives the lead screw 810 to rotate through the gear. Since the lead screw 810 and the moving block 820 are threadedly driven, when the lead screw 810 rotates, the moving block 820 moves along the axial direction of the lead screw 810, away from the spacer ring 410. When the moving block 820 moves, it drives the moving barrel 312 to move. The moving barrel 312 drives the second separator 430 to move synchronously. The axial length of the inner cavity 401 and the outer cavity 402 increases, the stroke of the liquid flowing in the inner cavity 401 and the outer cavity 402 increases, and the number of exposed first and second liquid guide cones increases.

[0075] In a further embodiment, the discharge mechanism 600 includes a discharge pipe 610, a first corrugated pipe 620, and a second corrugated pipe 630;

[0076] The drain pipe 610 is fixedly connected to the end of the frame 100 away from the second drum 320; the drain pipe 610 has a first drain channel and a second drain channel.

[0077] The first corrugated pipe 620 and the second corrugated pipe 630 are coaxially arranged, with one end of each fixedly connected to the drain pipe 610 and the other end fixedly connected to the movable tank 312; the first drain channel is connected to the first corrugated pipe 620 and the second drain channel is connected to the second corrugated pipe 630.

[0078] The movable barrel 312 has a first flow channel and a second flow channel; the two ends of the first flow channel are connected to the inner cavity 401 and the first corrugated pipe 620 respectively; the two ends of the second flow channel are connected to the outer cavity 402 and the second corrugated pipe 630 respectively.

[0079] When treating oily sludge, the oil phase collected in the inner cavity 401 enters the first corrugated pipe 620 through the first flow channel on the moving tank 312, and is finally discharged through the first drainage channel on the drain pipe 610. The water phase collected in the outer cavity 402 enters the second corrugated pipe 630 through the second flow channel, and is finally discharged through the second drainage channel on the drain pipe 610. When the position of the moving tank 312 is adjusted, the lengths of the first corrugated pipe 620 and the second corrugated pipe 630 change, thereby ensuring continuous discharge.

[0080] In a further embodiment, the drive mechanism 700 includes a drive wheel 710, a driven wheel 720, a belt 730, a first motor 740, a second motor 750, a reducer 760, a coupling 770, and a rotating shaft 780. The driven wheel 720 is synchronously rotatably connected to the drum body 300. The first motor 740 is mounted on the frame 100, and the drive wheel 710 is synchronously rotatably connected to the output end of the first motor 740. The belt 730 is sleeved on the drive wheel 710 and the driven wheel 720 to transmit power from the drive wheel 710 to the driven wheel 720. The second motor 750 is mounted on the frame 100. The input end of the reducer 760 is connected to the output end of the second motor 750, and the output end of the reducer 760 is connected to the rotating shaft 780 through the coupling 770. The rotating shaft 780 is fixedly connected to the drum 200.

[0081] After the first motor 740 and the second motor 750 are started, the first motor 740 drives the drive wheel 710 to rotate synchronously. The drive wheel 710 drives the driven wheel 720 to rotate through the belt 730. The driven wheel 720 drives the drum body 300 to rotate. The kinetic energy of the second motor 750 is transmitted to the rotating shaft 780 through the reducer 760 and the coupling 770, which in turn drives the drum 200 to rotate.

[0082] Work process:

[0083] The oily sludge from kitchen waste is pre-treated (crushed and homogenized), and then injected into the feed pipe 110. The oily sludge enters the rotating drum 200 from one end of the drum body 300 via the feed pipe 110. The first motor 740 and the second motor 750 are started. The first motor 740 drives the drive wheel 710 to rotate synchronously. The drive wheel 710 drives the driven wheel 720 to rotate via the belt 730, which in turn drives the drum body 300 to rotate. The kinetic energy of the second motor 750 is transmitted to the rotating shaft 780 through the reducer 760 and coupling 770, which in turn drives the rotating drum 200 to rotate. The rotating drum 200 and the drum body 300 rotate in the same direction at a differential speed. When the rotating drum 200 rotates, it drives the spiral blades 500 to rotate synchronously.

[0084] The sludge in the rotating drum 200 enters the chamber between the rotating drum body 300 and the rotating drum 200 through the feed port 210. The high-speed rotation of the rotating drum body 300 causes the material in it to stratify according to density under the action of centrifugal force. The densest solid is thrown towards the inner wall of the first rotating drum 310 and the second rotating drum 320, the intermediate liquid (water phase) forms the middle layer, and the least dense liquid (oil phase) gathers in the innermost layer.

[0085] Since the drum body 300 and the drum 200 rotate at different speeds, the spiral blades 500 push the solids deposited on the inner wall of the drum body 300 toward the tip of the second drum 320 away from the first drum 310. During this process, the solids are squeezed and dehydrated, and the free liquid moves through the conveying hole 510 on the spiral blades 500 toward the end of the first drum 310 away from the second drum 320. The dehydrated solids are discharged from the second drum 320 through the slag discharge hole 321.

[0086] Since the solid occupies the space of the second drum 320, after the liquid reaches the first separation chamber between the drum body 300 and the rotating cylinder 200, it gradually moves towards the end of the first drum 310 away from the second drum 320. During the flow, the aqueous phase passes through the gap between the partition ring 410 and the drum body 300 and enters the outer cavity 402, while the oil phase passes through the gap between the partition ring 410 and the rotating cylinder 200 and enters the inner cavity 401. The oil phase collected in the inner cavity 401 enters the first bellows 620 through the first flow channel on the moving tank 312 and is finally discharged through the first drain channel on the drain pipe 610. The aqueous phase collected in the outer cavity 402 enters the second bellows 630 through the second flow channel and is finally discharged through the second drain channel on the drain pipe 610.

[0087] During the treatment of different batches of oily sludge with varying oil-to-water ratios, a portion of the oil phase may enter the outer cavity 402. In this case, as the rotating drum 200 and drum body 300 rotate, the oil phase in the outer cavity 402 forms a liquid ring on the inner side of the outer cavity 402 and enters the inner cavity 401 through the second guide cone. Conversely, a portion of the water phase may enter the inner cavity 401. In this case, as the rotating drum 200 and drum body 300 rotate, the water phase in the inner cavity 401 forms a liquid ring on the outer side of the inner cavity 401 and enters the outer cavity 402 under pressure through the first guide cone. This process ensures more thorough separation of the two liquid phases and further optimizes the treatment effect.

[0088] When the water phase discharged from the drum body 300 contains a portion of the oil phase, or the oil phase contains a portion of the water phase, the handwheel 830 is turned. The handwheel 830 drives the lead screw 810 to rotate through the gear. Due to the threaded transmission between the lead screw 810 and the moving block 820, when the lead screw 810 rotates, the moving block 820 moves along the axial direction of the lead screw 810, moving away from the spacer ring 410. When the moving block 820 moves, it drives the moving barrel 312 to move. The moving barrel 312 drives the second separating cylinder 430 to move synchronously. The axial length of the inner cavity 401 and the outer cavity 402 increases, and the stroke of the liquid flowing in the inner cavity 401 and the outer cavity 402 increases, so that the liquid entering the inner cavity 401 and the outer cavity 402 has sufficient time to stratify and form a stable concentric liquid ring, thereby optimizing the treatment effect. Because the spacer ring 410 and the first separator cylinder 420 are sealed together, the inner cavity 401 and the outer cavity 402 remain separated. As the lengths of the inner cavity 401 and the outer cavity 402 increase, the number of exposed first and second liquid guiding cones increases. The oil phase entering the outer cavity 402 can enter the inner cavity 401 more quickly through the second liquid guiding cone, and the aqueous phase entering the inner cavity 401 can enter the outer cavity 402 more quickly through the first liquid guiding cone, further optimizing the treatment effect and improving the treatment efficiency.

[0089] When the position of the moving bucket 312 is adjusted, the lengths of the first corrugated pipe 620 and the second corrugated pipe 630 change, thereby ensuring continuous material discharge.

[0090] Furthermore, the present invention also provides a method for treating oily sludge, comprising the following steps:

[0091] S1: Place the material in the crusher for crushing; thereby processing large pieces of sludge or viscous sludge into material with uniform particle size, which facilitates subsequent homogenization and centrifugal separation steps.

[0092] S2: Pour the crushed material into a high-level buffer tank for homogenization; make the composition and concentration of the material uniform and stable, thereby ensuring that the composition and concentration of the sludge entering the oily sludge treatment device are uniform and stable.

[0093] S3: The homogenized material is injected into the rotary drum 200 of an oily sludge treatment device through the feed pipe 110;

[0094] S4: Start the drive mechanism 700 of an oily sludge treatment device to separate the material into three phases: oil, water, and solid through centrifugal action.

[0095] The oily sludge treatment device of the present invention is used to treat oily sludge, and the resulting oil and water phases have higher purity, which facilitates subsequent resource utilization.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for treating oil-containing sludge, characterized by comprising: The utility model relates to a rotary drum device for separating solid-liquid mixture, comprising: a frame; a rotary drum extending horizontally and rotatably mounted on the frame, a feeding port being formed on the peripheral wall of the rotary drum; a rotary drum body comprising a first rotary drum and a second rotary drum, the first rotary drum being barrel-shaped and the second rotary drum being cone-shaped, the first rotary drum and the second rotary drum being coaxially arranged and fixedly connected, the large end of the second rotary drum facing the open end of the first rotary drum, the feeding port facing the end of the second rotary drum close to the first rotary drum, a discharge hole being formed on the peripheral wall of the end of the second rotary drum away from the first rotary drum; a separation mechanism arranged at the end of the second rotary drum away from the first rotary drum, the separation mechanism separating the rotary drum body into a first separation cavity and a second separation cavity in the axial direction and separating the second separation cavity into an inner cavity and an outer cavity, the inner cavity and the outer cavity being in communication with the first separation cavity, the separation mechanism comprising a separation ring, a first separation cylinder and a second separation cylinder, the separation ring being coaxially arranged with the rotary drum body and fixedly connected to the rotary drum body at the end of the second rotary drum away from the first rotary drum, the inner diameter of the separation ring being greater than the outer diameter of the rotary drum and the outer diameter of the separation ring being less than the inner diameter of the rotary drum body; the first separation cylinder being fixedly connected to the separation ring and located in the second separation cavity, the inner diameter of the first separation cylinder being greater than the inner diameter of the separation ring and the outer diameter of the first separation cylinder being less than the outer diameter of the separation ring, the first separation cylinder separating the second separation cavity into the inner cavity and the outer cavity; the second separation cylinder being fixedly connected to the moving barrel, the inner diameter of the second separation cylinder being greater than the inner diameter of the separation ring and the outer diameter of the second separation cylinder being less than the outer diameter of the separation ring, the second separation cylinder being sealingly connected to the first separation cylinder, the moving barrel being connected to a distance adjusting mechanism for driving the moving barrel to move axially; a spiral blade fixedly connected to the outer wall of the rotary drum and arranged in the first separation cavity, the outer periphery of the spiral blade being in contact with the inner wall of the rotary drum body, the spiral blade being provided with a plurality of conveying holes spaced apart along the extension direction of the spiral blade; a discharge mechanism for discharging the materials in the inner cavity and the outer cavity from the rotary drum body; a driving mechanism for driving the rotary drum body and the rotary drum to rotate at different speeds.

2. An apparatus for treating oil-containing sludge according to claim 1, wherein the inner wall of the first separation cylinder and the outer wall of the second separation cylinder are in abutment and sealingly connected, the peripheral wall of the first separation cylinder and the peripheral wall of the second separation cylinder are each provided with a plurality of liquid guiding holes, the plurality of liquid guiding holes being spaced apart along the axial direction of the first separation cylinder or the second separation cylinder, the first separation cylinder being fixedly connected to a plurality of first liquid guiding cones, the large ends of the plurality of first liquid guiding cones being in communication with the plurality of liquid guiding holes on the first separation cylinder and the small ends of the plurality of first liquid guiding cones extending into the outer cavity, the second separation cylinder being fixedly connected to a plurality of second liquid guiding cones, the large ends of the plurality of second liquid guiding cones being in communication with the plurality of liquid guiding holes on the second separation cylinder and the small ends of the plurality of second liquid guiding cones extending into the inner cavity.

3. The oil-containing sludge treatment device according to claim 1, characterized by the distance adjusting mechanism comprises a lead screw, a moving block and a hand wheel, the lead screw being rotatably mounted on the frame, the moving block being fixedly connected to the moving barrel and threadedly connected to the lead screw, the hand wheel being in gear transmission with the lead screw.

4. The oil-containing sludge treatment device according to claim 1, characterized by the discharge mechanism comprises a liquid discharge pipe, a first corrugated pipe and a second corrugated pipe, the liquid discharge pipe being fixedly connected to the end of the frame away from the second rotary drum, the liquid discharge pipe being provided with a first liquid discharge flow channel and a second liquid discharge flow channel in the interior thereof, The first bellow and the second bellow are coaxially arranged, one end of each of the first bellow and the second bellow is fixedly connected to the liquid discharge pipe, and the other end of each of the first bellow and the second bellow is fixedly connected to the moving barrel; the first liquid discharge flow channel is in communication with the first bellow, and the second liquid discharge flow channel is in communication with the second bellow. The moving barrel is provided with a first flow channel and a second flow channel; two ends of the first flow channel are in communication with the inner cavity and the first bellow, respectively; and two ends of the second flow channel are in communication with the outer cavity and the second bellow, respectively.

5. The oil-containing sludge treatment device according to claim 1, wherein The rack is fixedly connected with a feeding pipe, the feeding pipe is coaxially arranged in the rotating drum, one end of the feeding pipe extends out of the rotating drum, and the other end of the feeding pipe is opposite to the material inlet.

6. The oil-containing sludge treatment device according to claim 1, wherein The driving mechanism comprises a first motor, a driving wheel, a driven wheel and a belt; the driven wheel is synchronously connected to the rotating drum body, the first motor is installed on the rack, and the driving wheel is synchronously connected to the output end of the first motor; and the belt is sleeved on the driving wheel and the driven wheel, so as to transmit power from the driving wheel to the driven wheel.

7. An apparatus for treating oil-containing sludge according to claim 6, wherein The driving mechanism further comprises a second motor, a speed reducer, a shaft coupling and a rotating shaft; the second motor is installed on the rack, the input end of the speed reducer is connected to the output end of the second motor, the output end of the speed reducer is connected to the rotating shaft through the shaft coupling, and the rotating shaft is fixedly connected to the rotating drum.

8. A method for treating oil-containing sludge, characterized by, The method comprises the following steps: S1: placing the material in the crusher to crush; S2: pouring the crushed material into the high-position buffer tank to homogenize; S3: injecting the homogenized material into the rotating drum of the oil-containing sludge treatment device according to any one of claims 1-7 through the feeding pipe; S4: starting the driving mechanism of the oil-containing sludge treatment device according to any one of claims 1-7 to separate the material into oil, water and solid phases through centrifugal action.

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