A high-efficiency oil removal and recovery device for kitchen wastewater

Abstract

The application provides a kind of high-efficiency oil removal and recovery device for kitchen wastewater, relating to the technical field of oil removal and recovery device, comprising: a treatment tank, a treatment chamber is arranged in the treatment tank, and the top of the treatment chamber is used for temporarily storing kitchen wastewater; a liquid level adjusting member is arranged on the inner bottom surface of the treatment chamber, and the liquid level adjusting member is used for adjusting the liquid level of the kitchen wastewater; an oil-liquid solidifying member is arranged directly above the treatment chamber, and the oil-liquid solidifying member is used for condensing and adsorbing the oil on the surface of the kitchen wastewater by low temperature; a displacement driving member is arranged on the upper part of the treatment tank, and the oil-liquid solidifying member is fixedly installed on the displacement driving member. The application changes the liquid level of the kitchen wastewater in the treatment chamber by using the liquid level adjusting member, and then cooperates with the oil-liquid solidifying member to condense and adsorb the oil on the surface of the kitchen wastewater, which can quickly collect the oil, and finally move and remove by using the displacement driving member, realizing the rapid collection of the oil in the kitchen wastewater.

Description

Technical Field

[0001] This invention relates to the field of oil removal and recovery devices, specifically to a high-efficiency oil removal and recovery device for kitchen wastewater. Background Technology

[0002] Kitchen waste oil recycling refers to the professional collection and refining of waste oil generated by the catering industry, converting it into biodiesel or other useful products. This process not only aligns with environmental protection principles but also offers significant economic benefits. Recycling kitchen waste oil helps reduce environmental pollution and mitigates the harm caused by directly discharging waste oil into sewers or indiscriminate dumping. Through professional recycling and treatment, water and soil pollution can be reduced, protecting the ecological environment. Furthermore, the recycling of kitchen waste oil contributes to the development of a circular economy and promotes resource reuse.

[0003] For example, in the patent application with publication number CN115784504A, entitled "An Invention Patent for a High-Efficiency Oil Removal Device for Kitchen Wastewater," the invention patent includes an inlet system, a filtration system, a primary air flotation system, a secondary air flotation system, a high-efficiency sedimentation tank, a high-efficiency oil removal device, and a biochemical system connected in sequence. The sludge discharge end of the high-efficiency sedimentation tank is connected to a drying system, and the high-efficiency oil removal device is connected to an oil drying and recovery system. The high-efficiency oil removal device for kitchen wastewater provided by this invention solves the problem of incomplete oil-water separation in existing kitchen wastewater treatment processes. Oil encapsulates microorganisms, preventing them from absorbing oxygen, leading to unstable operation of the biochemical process section and ultimately resulting in inconsistent effluent discharge that fails to meet standards.

[0004] The filtration system in this scheme can intercept a large amount of suspended solids and impurities. The water then enters the primary air flotation system for initial oil removal, followed by the secondary air flotation system for further oil-water separation. The effluent then passes through a high-efficiency sedimentation tank for high-efficiency sedimentation, where some inorganic matter is settled. It then undergoes deep oil removal treatment through a high-efficiency oil removal device. The effluent enters the biological system, and the concentrated liquid from the high-efficiency oil removal device enters the oil drying and recovery system for recycling, realizing the resource utilization of oil. The bottom sludge from the high-efficiency sedimentation tank enters the drying system for drying treatment.

[0005] However, this invention uses air flotation technology for oil removal, and air flotation equipment is usually quite complex, requiring regular maintenance and upkeep, which increases operating costs. In addition, air flotation equipment has poor adaptability to influent water quality and requires high stability of influent load. If the water quality fluctuates significantly, it may affect the oil removal effect, thus having certain drawbacks.

[0006] In view of the above, this application is hereby submitted. Summary of the Invention

[0007] The purpose of this invention is to provide a highly efficient oil removal and recovery device for kitchen wastewater to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: Embodiments of the present invention provide a high-efficiency oil removal and recovery device for kitchen wastewater, comprising: The treatment box has a treatment chamber inside, and the top of the treatment chamber is used to temporarily store kitchen wastewater. A liquid level regulating component is disposed on the inner bottom surface of the treatment chamber, and the liquid level regulating component is used to adjust the liquid level height of the kitchen wastewater; An oil solidification component is disposed directly above the processing chamber. The oil solidification component solidifies and adsorbs the oil on the surface of the kitchen wastewater at low temperature. A displacement drive is provided on the upper part of the processing box, and the oil curing component is fixedly installed on the displacement drive. The displacement drive is used to adjust the spatial position of the oil curing component.

[0009] Furthermore, the liquid level regulating component includes: A sealing plate is movably disposed within the processing chamber, and the sealing plate is in contact with and slides against the inner wall of the processing chamber. A corrugated airbag is disposed between the sealing plate and the bottom surface of the processing chamber, and the corrugated airbag is used to drive the sealing plate to move up and down. A drive air pump is installed on the processing box, and the output end of the drive air pump is connected to the corrugated airbag.

[0010] Furthermore, an installation groove is provided on the side circumferential surface of the sealing plate, and a sealing ring is embedded in the installation groove.

[0011] Furthermore, the oil-curing component includes: A cooling plate is fixedly installed on the displacement drive component, and the cooling plate cools and solidifies the oil in the kitchen wastewater. An isolation solidification airbag is fixedly and sealed at the edge of the cooling plate, and a movable air cavity is provided between the isolation solidification airbag and the cooling plate. A discharge air pump is fixedly installed on the cooling plate, and the output end of the discharge air pump is connected to the movable air chamber.

[0012] Furthermore, two unloading air pumps are provided, and the two unloading air pumps are respectively used to inflate and vent the movable air chamber.

[0013] Furthermore, a cooling medium is provided between the cooling plate and the isolation solidification airbag, and the cooling medium is located inside the isolation solidification airbag.

[0014] Furthermore, the outer surface of the isolation coagulation airbag is roughened.

[0015] Furthermore, the displacement driving element includes: The rack is used to provide a load-bearing plane and a mounting plane; A drive mounting platform is horizontally and slidably mounted on the top of the frame. A drive screw is rotatably mounted on the frame and threadedly connected to the drive mounting table. A drive motor is connected to the end of the drive screw and the drive motor is fixedly mounted on the frame. An electric actuator is fixedly mounted on the drive mounting platform, and the output end of the electric actuator is fixedly connected to the cooling plate.

[0016] Furthermore, the drive motor is a servo motor, and the drive screw is a reciprocating screw.

[0017] Furthermore, a collection container is provided below the drive mounting platform, and the collection container is arranged side by side with the processing box.

[0018] The above-described solution of the present invention has at least the following beneficial effects: The oil solidification component of this invention solidifies and adsorbs oil in kitchen wastewater by cooling it below the freezing point of the oil. At the same time, it works in conjunction with a liquid level regulating component to repeatedly change the contact depth between the kitchen wastewater and the oil solidification component, so that the oil in the kitchen wastewater can be completely solidified and adsorbed on the oil solidification component, which greatly improves the treatment effect of kitchen wastewater. It has the characteristics of simple structure and convenient operation.

[0019] Furthermore, the oil solidification component utilizes the contraction of the isolation coagulation airbag to increase the coagulation treatment area of ​​the oil, while the extension of the isolation coagulation airbag breaks and separates the solidified oil block, greatly improving the oil removal efficiency of kitchen wastewater. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency oil removal and recovery device for kitchen wastewater provided by the present invention; Figure 2 This is a schematic diagram of the liquid level regulating component of a high-efficiency oil removal and recovery device for kitchen wastewater provided by the present invention; Figure 3 A schematic diagram of the sealing plate structure of a high-efficiency oil removal and recovery device for kitchen wastewater provided by the present invention; Figure 4This is a schematic diagram of the cooling plate of a high-efficiency oil removal and recovery device for kitchen wastewater provided by the present invention in the state of the extended isolation condensation airbag; Figure 5 This is a schematic diagram of the cooling plate of a high-efficiency oil removal and recovery device for kitchen wastewater provided by the present invention in the state of shrinking and shrunken isolation condensation airbag.

[0021] Explanation of reference numerals in the attached figures: 1. Processing box; 2. Processing chamber; 3. Liquid level regulating component; 4. Oil solidification component; 5. Displacement drive component; 6. Sealing plate; 7. Corrugated airbag; 8. Drive air pump; 9. Mounting slot; 10. Sealing ring; 11. Cooling plate; 12. Isolation solidification airbag; 13. Discharge air pump; 14. Movable air chamber; 15. Cooling medium; 16. Frame; 17. Drive mounting platform; 18. Drive screw; 19. Electric push rod; 20. Collection container; 21. Drive motor. Detailed Implementation

[0022] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0023] like Figures 1 to 5 As shown, an embodiment of the present invention provides a high-efficiency oil removal and recovery device for kitchen wastewater, comprising: The treatment box 1 has a treatment chamber 2 inside, and the top of the treatment chamber 2 is used to temporarily store kitchen wastewater.

[0024] Liquid level regulating component 3 is disposed on the inner bottom surface of the treatment chamber 2, and is used to regulate the liquid level of kitchen wastewater.

[0025] Oil solidification component 4 is disposed directly above the processing chamber 2. The oil solidification component 4 solidifies and adsorbs the oil on the surface of the kitchen wastewater at low temperature.

[0026] The displacement drive component 5 is disposed on the upper part of the processing box 1, and the oil curing component 4 is fixedly installed on the displacement drive component 5. The displacement drive component 5 is used to adjust the spatial position of the oil curing component 4.

[0027] In this embodiment, when oil removal and recovery of kitchen wastewater is required, the kitchen wastewater is added to the processing chamber 2 and allowed to stand, allowing the oil in the wastewater to float to the surface. Then, the displacement drive 5 moves the oil solidification component 4 to the upper part of the processing chamber 2, ready for the oil removal operation. Subsequently, the liquid level adjustment component 3 slowly raises or lowers the liquid level, ensuring that the surface of the kitchen wastewater fully contacts the oil solidification component 4. Due to the low temperature of the oil solidification component 4, the oil solidifies and adheres to it upon contact. After multiple solidification and adsorption processes, the oil in the kitchen wastewater is completely solidified and adsorbed onto the oil solidification component 4, completing the oil extraction. Finally, the displacement drive 5 moves the oil solidification component 4 out of the processing chamber 2, allowing the solidified oil on the component to be removed, completing the oil collection operation.

[0028] Furthermore, the liquid level regulating component 3 includes: A sealing plate 6 is movably disposed within the processing chamber 2, and the sealing plate 6 is in contact with and slides against the inner wall of the processing chamber 2.

[0029] A corrugated airbag 7 is disposed between the sealing plate 6 and the bottom surface of the processing chamber 2. The corrugated airbag 7 is used to drive the sealing plate 6 to move up and down.

[0030] A drive air pump 8 is installed on the processing box 1, and the output end of the drive air pump 8 is connected to the corrugated airbag 7.

[0031] In this embodiment, when oil collection from kitchen wastewater is required, the drive air pump 8 intermittently inflates the corrugated airbag 7. When the drive air pump 8 inflates the corrugated airbag 7, the airbag 7 extends, pushing the sealing plate 6 upwards, thereby causing the surface level of the kitchen wastewater above the sealing plate 6 to rise. When the drive air pump 8 stops working, the sealing plate 6 descends under the pressure of the kitchen wastewater, and the surface level of the kitchen wastewater above the sealing plate 6 drops. The intermittent inflation of the corrugated airbag 7 by the drive air pump 8 causes the surface level of the kitchen wastewater above the sealing plate 6 to fluctuate, which, in conjunction with the oil solidification component 4, allows the oil on the surface to solidify and be recovered, completing the oil collection operation of the kitchen wastewater.

[0032] In one specific embodiment, an installation groove 9 is provided on the side circumferential surface of the sealing plate 6, and a sealing ring 10 is embedded in the installation groove 9. The sealing ring 10 can improve the sealing performance between the sealing plate 6 and the inner wall of the treatment chamber 2, thereby effectively reducing the risk of kitchen wastewater leaking from the gap between the sealing plate 6 and the treatment chamber 2.

[0033] Furthermore, the oil-curing component 4 includes: A cooling plate 11 is fixedly mounted on the displacement drive component 5. The cooling plate 11 cools and solidifies the oil in the kitchen wastewater. The cooling plate contains a cooling element for further temperature reduction.

[0034] An isolation coagulation airbag 12 is fixedly and sealed at the edge of the cooling plate 11, and a movable air chamber 14 is provided between the isolation coagulation airbag 12 and the cooling plate 11.

[0035] The unloading air pump 13 is fixedly installed on the cooling plate 11, and the output end of the unloading air pump 13 is connected to the movable air chamber 14.

[0036] In existing technologies, air flotation is used for oil removal. Air flotation is a common wastewater treatment technology, mainly used to remove grease and suspended solids from wastewater. Its basic principle is to inject a large number of microbubbles into the wastewater, allowing these bubbles to adhere to the grease and suspended solids, forming an air-float mass with a density less than water. This allows the grease and suspended solids to float to the surface, achieving separation from the water.

[0037] Oil in wastewater typically exists in the form of suspended oil, dispersed oil, and emulsified oil. Tiny air bubbles carry a surface charge and possess a large specific surface area and surface energy, enabling them to effectively adhere to oil droplets and suspended solids. By adding flocculants, coagulants, and other chemical agents, the surface charge of oil droplets and suspended solids can be reduced, making them more likely to collide and coalesce, forming flotation bodies. Once the bubbles successfully adhere to the oil droplets and suspended solids, the resulting flotation bodies have a density less than water and quickly float to the surface under buoyancy. However, oil flotation equipment is generally complex and requires regular maintenance, increasing operating costs. Furthermore, flotation equipment has poor adaptability to influent water quality and requires high stability of the influent load; significant fluctuations in water quality may affect the oil removal efficiency.

[0038] In this embodiment, after the kitchen wastewater in the treatment chamber 2 has settled, the oil floats on the surface of the liquid. When the cooling plate 11 enters the treatment chamber 2, as... Figure 5 As shown, the unloading air pump 13 exhausts air from the isolation coagulation airbag 12, causing it to be in a shrunken and wrinkled state, which increases the contact area between the isolation coagulation airbag 12 and the surface of the kitchen wastewater. Driven by the level regulating component 3, the surface of the kitchen wastewater repeatedly contacts the surface of the isolation coagulation airbag 12 outside the cooling plate 11. When the oil comes into contact with the low-temperature isolation coagulation airbag 12, it solidifies upon cooling and is adsorbed onto the surface of the isolation coagulation airbag 12. The repeated up-and-down movement of the kitchen wastewater quickly adsorbs the oil in the kitchen wastewater onto the surface of the isolation coagulation airbag 12, completing the oil collection operation in the kitchen wastewater.

[0039] After the oil collection operation of the kitchen wastewater is completed, the oil solidification component 4 is removed from the treatment chamber 2 by the displacement drive component 5. After the oil solidification component 4 is removed, the isolation coagulation airbag 12 is inflated by the unloading air pump 13. Figure 4 As shown, after the isolation solidification airbag 12 is inflated, the oil block adsorbed on the surface of the isolation solidification airbag 12 breaks and falls off, completing the unloading operation of the oil block.

[0040] There are two unloading air pumps 13, and the two unloading air pumps 13 are respectively used to inflate and vent the movable air chamber 14.

[0041] In one specific embodiment, a cooling medium 15 is disposed between the cooling plate 11 and the isolation solidification airbag 12, and the cooling medium 15 is located inside the isolation solidification airbag 12. The cooling medium 15 can be thermally conductive silicone grease. When the isolation solidification airbag 12 is fully contracted, the thermally conductive silicone grease allows for sufficient contact between the cooling plate 11 and the isolation solidification airbag 12, improving the cooling effect. Furthermore, when the unloading air pump 13 evacuates the isolation solidification airbag 12, it does not cause any loss of the thermally conductive silicone grease.

[0042] In addition, the outer surface of the isolation coagulation airbag 12 is roughened. Roughening the outer surface of the isolation coagulation airbag 12 can increase its roughness, thereby improving the adsorption of oil on the surface of the isolation coagulation airbag 12 after solidification, thus enabling rapid removal of solidified oil.

[0043] It should be noted that, in order to avoid mutual interference between the two unloading air pumps 13, solenoid valves are installed between the two unloading air pumps 13 and the movable air chamber 14. When the unloading air pump 13 is working, the corresponding solenoid valve is opened.

[0044] Furthermore, the displacement driving element 5 includes: The frame 16 is used to provide a load-bearing plane and a mounting plane.

[0045] A drive mounting platform 17 is horizontally and slidably mounted on the top of the frame 16.

[0046] A drive screw 18 is rotatably mounted on the frame 16 and threadedly connected to the drive mounting platform 17. A drive motor 21 is connected to the end of the drive screw 18 and is fixedly mounted on the frame 16.

[0047] An electric push rod 19 is fixedly installed on the drive mounting platform 17, and the output end of the electric push rod 19 is fixedly connected to the cooling plate 11.

[0048] In this embodiment, when the drive motor 21 is working, the drive screw 18 rotates along with it. The drive mounting platform 17, which is threadedly connected to the drive screw 18, cannot rotate with the drive screw 18 due to the restriction of the frame 16. The drive mounting platform 17 can only move along the length of the drive screw 18, thereby moving the oil solidification component 4 on the upper side of the processing tank 1. Simultaneously, in conjunction with the electric push rod 19, the oil solidification component 4 is driven into or out of the processing chamber 2, completing the collection and removal of the solidified oil.

[0049] In one specific embodiment, the drive motor 21 is a servo motor, and the drive screw 18 is a reciprocating screw. The servo motor is the core actuator in a servo system, precisely adjusting the motion state of mechanical components by receiving control signals. Essentially, it is an "indirect speed change device," capable of converting electrical signals into angular displacement or angular velocity output on the shaft, achieving high-precision control of speed and position. The use of a servo motor in the drive motor 21 allows for precise adjustment of the position of the oil-curing component 4, thereby enabling the switching between oil curing and cured oil removal operations.

[0050] Furthermore, a reciprocating lead screw is a mechanical device that enables a slider to reciprocate without changing the direction of the spindle rotation. Its structural features include two threaded grooves with the same pitch but opposite directions, connected at both ends by transition curves. Through the rotation of the lead screw, the side of the helical groove pushes the slider placed within the groove to perform axial reciprocating motion. The drive lead screw 18 is a reciprocating lead screw, allowing for position adjustment of the drive mounting platform 17 via the unidirectional drive of the drive motor 21.

[0051] To facilitate the collection of solidified oil, a collection container 20 is provided below the drive mounting platform 17, and the collection container 20 is arranged side by side with the processing box 1.

[0052] Working Principle: First, the kitchen wastewater to be treated is added to the treatment chamber 2 and allowed to stand, allowing the oil in the wastewater to float on the surface. If necessary, the kitchen wastewater can be heated to boiling, which quickly causes the oil to float to the surface. Then, the displacement drive 5 moves the oil solidification component 4 to the top of the treatment chamber 2, while simultaneously opening the cooling plate 11, cooling the plate 11, and the external isolation coagulation airbag 12 for cooling. Subsequently, the liquid level adjustment component 3 drives the kitchen wastewater to rise and fall repeatedly, ensuring that the surface of the kitchen wastewater fully contacts the isolation coagulation airbag 12 (in its contracted state). When the oil in the kitchen wastewater comes into contact with the low-temperature isolation coagulation airbag 12, it solidifies and adheres to the surface of the airbag 12. After repeatedly adjusting the rise and fall of the kitchen wastewater, the oil in the kitchen wastewater can be solidified and removed. Finally, the displacement drive 5 moves the oil solidification component 4 out of the processing chamber 2 and above the collection container 20. At the same time, the unloading air pump 13 inflates the isolation solidification airbag 12. After inflation, the isolation solidification airbag 12 takes on an arc shape. After the oil solidification block breaks, it falls off the surface of the isolation solidification airbag 12, completing the oil removal and collection operation.

[0053] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-efficiency oil removal and recovery device for kitchen wastewater, characterized in that: include: The treatment box (1) is provided with a treatment chamber (2) inside the treatment box (1), and the top of the treatment chamber (2) is used to temporarily store kitchen wastewater; Liquid level regulating component (3) is disposed on the inner bottom surface of the processing chamber (2) and is used to regulate the liquid level height of kitchen wastewater. Oil solidification component (4) is located directly above the processing chamber (2). The oil solidification component (4) solidifies and adsorbs the oil on the surface of kitchen wastewater at low temperature. Displacement drive (5), the displacement drive (5) is disposed on the upper part of the processing box (1), and the oil curing component (4) is fixedly installed on the displacement drive (5). The displacement drive (5) is used to adjust the spatial position of the oil curing component (4). The oil-cured component (4) includes: Cooling plate (11), the cooling plate (11) is fixedly installed on the displacement drive (5), the cooling plate (11) solidifies the oil in the kitchen wastewater by cooling; An isolation coagulation airbag (12) is fixedly and sealed on the side edge of the cooling plate (11), and there is a movable air chamber (14) between the isolation coagulation airbag (12) and the cooling plate (11). A discharge air pump (13) is fixedly installed on the cooling plate (11); There are two unloading air pumps (13), and the two unloading air pumps (13) are respectively used to inflate and vent the movable air chamber (14); A cooling medium (15) is provided between the cooling plate (11) and the isolation solidification airbag (12), and the cooling medium (15) is located inside the isolation solidification airbag (12).

2. The efficient oil removal and recovery device for kitchen wastewater according to claim 1, characterized in that: The liquid level regulating component (3) includes: A sealing plate (6) is movably disposed within the processing chamber (2), and the sealing plate (6) is in contact with the inner wall of the processing chamber (2) and slides in contact with it. A corrugated airbag (7) is disposed between the sealing plate (6) and the bottom surface of the processing chamber (2). The corrugated airbag (7) is used to drive the sealing plate (6) to move up and down. A drive air pump (8) is installed on the processing box (1), and the output end of the drive air pump (8) is connected to the corrugated airbag (7).

3. The efficient oil removal and recovery device for kitchen wastewater according to claim 2, characterized in that: The sealing plate (6) has an installation groove (9) on its side circumferential surface, and a sealing ring (10) is inlaid in the installation groove (9).

4. The efficient oil removal and recovery device for kitchen wastewater as described in claim 1, characterized in that, The outer surface of the isolation coagulation airbag (12) is roughened.

5. The efficient oil removal and recovery device for kitchen wastewater according to claim 1, characterized in that: The displacement driving element (5) includes: A frame (16) is provided to provide a load-bearing plane and a mounting plane; A drive mounting platform (17) is horizontally and slidably mounted on the top of the frame (16); A drive screw (18) is rotatably mounted on the frame (16) and threadedly connected to the drive mounting table (17). A drive motor (21) is connected to the end of the drive screw (18) and is fixedly mounted on the frame (16). An electric push rod (19) is fixedly installed on the drive mounting platform (17), and the output end of the electric push rod (19) is fixedly connected to the cooling plate (11).

6. The efficient oil removal and recovery device for kitchen wastewater according to claim 5, characterized in that: The drive motor (21) is a servo motor, and the drive screw (18) is a reciprocating screw.

7. The efficient oil removal and recovery device for kitchen wastewater as described in claim 5, characterized in that, A collection container (20) is provided below the drive mounting platform (17), and the collection container (20) is arranged side by side with the processing box (1).

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