Integrated oil-water separation device based on magnetic snowman-like janus particles

Abstract

The utility model provides an integration oil -water separation equipment based on magnetic snowman Janus particle, it includes first mixer, second mixer, third mixer, first separation groove, scraper mechanism, second separation groove and postprocessing mechanism, first mixer is equipped with sewage import, PH regulator import and first mixed liquid export, second mixer is equipped with with first mixed liquid export connection's first mixed liquid import, Janus particle solution import and second mixed liquid export, third mixer is equipped with with second mixed liquid export connection's second mixed liquid import, flocculating agent import and third mixed liquid export, third mixed liquid export communicates with first separation groove, second separation groove is located first separation groove one side, scraper mechanism is located first separation groove near second separation groove one side's top, postprocessing mechanism communicates with second separation groove, to separate processing with Janus oil dirt mixture in second separation groove.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an integrated oil-water separation device based on magnetic snowman-shaped Janus particles. Background Technology

[0002] With the rapid development of industrial production and the ever-increasing demands of daily life, the discharge of oily wastewater is increasing daily. Oily wastewater not only contains a large amount of floating oil, but also complex oil components such as emulsified oil and dissolved oil. Direct discharge of such wastewater will severely damage the aquatic ecosystem and waste resources. Therefore, efficient, economical, and environmentally friendly oil-water separation technology has become a research hotspot in the field of environmental engineering.

[0003] In recent years, Janus particles, as a functional material with an asymmetric structure and amphiphilic properties, have shown unique advantages in the field of oil-water separation. Magnetic Janus particles have both oleophilic and hydrophilic properties. When added to oil-water emulsions, these particles can rapidly separate tiny oil droplets from wastewater and guide the oil droplets to aggregate through magnetism, forming larger oil droplets that are easy to separate.

[0004] Existing oil-water separation equipment generally has the following disadvantages: First, the functional modules are scattered, and the processes of mixing, separation, and particle recovery need to be completed by multiple independent devices. The transfer between processes depends on manual operation, which not only makes the process cumbersome and inefficient, but also easily causes material loss. Second, the separation and recovery links are not smoothly connected, resulting in low efficiency of magnetic particle enrichment and transfer in the separation tank, which affects the overall processing rhythm.

[0005] Therefore, it is necessary to design an integrated oil-water separation device based on magnetic snowman-shaped Janus particles to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an integrated oil-water separation device based on magnetic snowman-shaped Janus particles, which features integrated functions, a coherent process, and efficient connection.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: an integrated oil-water separation device based on magnetic snowman-shaped Janus particles, comprising a first mixer, a second mixer, a third mixer, a first separation tank, a scraper mechanism, a second separation tank, and a post-treatment mechanism. The first mixer is provided with a wastewater inlet, a pH adjuster inlet, and a first mixed liquid outlet. The second mixer is provided with a first mixed liquid inlet connected to the first mixed liquid outlet, a Janus particle solution inlet, and a second mixed liquid outlet. The third mixer is provided with a second mixed liquid inlet, a flocculant inlet, and a third mixed liquid outlet connected to the second mixed liquid outlet. The third mixed liquid outlet is connected to the first separation tank, and the second separation tank is located on one side of the first separation tank. The scraper mechanism is located above the side of the first separation tank near the second separation tank to scrape the Janus oil-sludge mixture on the surface of the liquid in the first separation tank to the second separation tank. The post-treatment mechanism is connected to the second separation tank to separate the Janus oil-sludge mixture in the second separation tank.

[0008] As a further improvement of the present invention, the first separation tank includes a tank body with an opening at the top and a plurality of mutually parallel shelves vertically arranged in the tank body, the shelves being arranged along the scraping direction of the scraper mechanism.

[0009] As a further improvement of the present invention, the shelf includes a first shelf and a second shelf arranged at intervals in sequence. The bottom edge of the first shelf is connected to the bottom of the trough, and there is a gap between the bottom edge of the second shelf and the bottom of the trough. The top edge of the second shelf is higher than the top edge of the first shelf.

[0010] As a further improvement of the present invention, the scraper mechanism includes a drive motor, two sets of bearings disposed on both sides of the opening of the first separation groove, two rotating shafts disposed on the bearings, sprockets disposed at both ends of the rotating shafts, a chain disposed on the sprockets, and a scraper disposed on the chain and moving with the chain.

[0011] As a further improvement of this utility model, the number of scrapers is at least two, and they are evenly distributed on the chain.

[0012] As a further improvement of the present invention, the first mixer, the second mixer and the third mixer each include an elongated outer shell and a stirring impeller disposed inside the elongated outer shell, and the first mixer, the second mixer and the third mixer are arranged horizontally side by side.

[0013] As a further improvement of the present invention, the first mixed liquid outlet and the sewage inlet are respectively located at the front and rear ends of the first mixer, the first mixed liquid inlet and the second mixed liquid outlet are respectively located at the front and rear ends of the second mixer, and the second mixed liquid inlet and the third mixed liquid outlet are respectively located at the front and rear ends of the third mixer.

[0014] As a further improvement of the present invention, the invention also includes a pH adjuster storage tank, a Janus granule solution storage tank, and a flocculant storage tank. The pH adjuster storage tank is connected to the pH adjuster inlet, the Janus granule solution storage tank is connected to the Janus granule solution inlet, and the flocculant storage tank is connected to the flocculant inlet.

[0015] As a further improvement of the present invention, a wastewater storage tank is also included, which is located above the first mixer and is connected to the first mixer through the wastewater inlet.

[0016] As a further improvement of the present invention, the post-processing mechanism includes a heating tank, a centrifuge, and an oil storage tank. The heating tank is connected to the second separation tank, and a pump is provided between the heating tank and the second separation tank. The Janus oil mixture in the second separation tank is pumped into the heating tank by the pump. The centrifuge is connected to the heating tank, the Janus particle solution storage tank, and the oil storage tank respectively. The heated Janus oil mixture is fed into the centrifuge for solid-liquid separation. The separated oil is fed into the oil storage tank, and the separated Janus particles are fed into the Janus particle solution storage tank.

[0017] As can be seen from the above technical solution, the integrated oil-water separation equipment based on magnetic snowman-shaped Janus particles of this utility model leverages the performance advantages of magnetic snowman-shaped Janus particles and improves separation efficiency and applicability through optimized equipment structure design: the equipment adopts a gradient structure design of a three-stage mixer. The first mixer precisely adjusts the pH value of the wastewater to break the emulsion state, creating a suitable environment for the efficient interaction between Janus particles and oil droplets in the subsequent reaction; the second mixer ensures full contact between Janus particles and wastewater through turbulent stirring, maximizing the particle's oil droplet capture efficiency; the third mixer achieves gentle mixing of flocculant and mixed liquid, promoting stable aggregation of oil clumps. The three-stage mixing process avoids the problem of insufficient reaction or excessive shearing leading to oil clump breakage in traditional single-stage mixing equipment. At the same time, the first separation tank achieves a large liquid surface of the mixed liquid, which, combined with the scraping action of the scraper mechanism, allows the aggregated oil clumps to be quickly enriched and transferred to the second separation tank, significantly improving the separation efficiency of oily wastewater. Attached Figure Description

[0018] Figure 1This is a perspective view of an integrated oil-water separation device based on magnetic snowman-shaped Janus particles, according to an embodiment of the present invention.

[0019] Figure 2 for Figure 1 A top view of the oil-water separation equipment (sewage storage tanks and part of the container body are omitted).

[0020] Figure 3 for Figure 1 A perspective view of the first mixer, second mixer, third mixer, first separation tank, scraper mechanism, and second separation tank.

[0021] Figure 4 for Figure 3 A three-dimensional view of the first mixer, the second mixer, and the third mixer.

[0022] Figure 5 This is a diagram showing the connection relationship between the first separation tank, the scraper mechanism, and the second separation tank.

[0023] Figure 6 for Figure 3 Enlarged view of the rectangular section.

[0024] Figure 7 for Figure 6 Enlarged view of the rectangular section. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please refer to Figures 1 to 3 As shown, this utility model provides an integrated oil-water separation device based on magnetic snowman-shaped Janus particles, which includes a wastewater storage tank 10, a reagent feeding mechanism 20, a mixing mechanism 30, a first separation tank 40, a scraper mechanism 50, a second separation tank 60, a post-treatment mechanism 70, and a control system. The reagent feeding mechanism 20 includes a Janus particle solution mixing tank 21, a flocculant mixing tank 22, a pH adjuster storage tank 23, a Janus particle solution storage tank 24, and a flocculant storage tank 25, arranged sequentially along the length of container B. The mixing mechanism 30, the first separation tank 40, the scraper mechanism 50, and the second separation tank 60 are located in container A, and the post-treatment mechanism 70 is located in container C. Containers A, B, and C are arranged side-by-side, with container A and container C located on opposite sides of container B.

[0027] Wastewater storage tank 10 is located on top of container A, and therefore, vertically, wastewater storage tank 10 is positioned above mixing mechanism 30. Mixing mechanism 30 includes a first mixer 31, a second mixer 32, and a third mixer 33. The first mixer 31, the second mixer 32, and the third mixer 33 each include an elongated outer shell and an impeller disposed within the elongated outer shell. The rotation center of the impeller is horizontally positioned and is arranged along the length of the outer shell.

[0028] Please participate together Figure 4 As shown, the first mixer 31 has a wastewater inlet 311, a pH adjuster inlet, and a first mixed liquid outlet 312. The second mixer 32 has a first mixed liquid inlet 321 connected to the first mixed liquid outlet 312, a Janus particle solution inlet, and a second mixed liquid outlet 322. The third mixer 33 has a second mixed liquid inlet 331 connected to the second mixed liquid outlet 322, a flocculant inlet, and a third mixed liquid outlet 332. The first mixed liquid outlet 312 and the wastewater inlet 311 are located at the front and rear ends of the first mixer 31, respectively; the first mixed liquid inlet 321 and the second mixed liquid outlet 322 are located at the front and rear ends of the second mixer 32, respectively; and the second mixed liquid inlet 331 and the third mixed liquid outlet 332 are located at the front and rear ends of the third mixer 33, respectively.

[0029] Wastewater storage tank 10 is connected to the first mixer 31 via wastewater inlet 311, and wastewater is fed into the first mixer 31 by gravity. pH adjuster storage tank 23 is connected to the pH adjuster inlet of the first mixer 31 to introduce pH adjuster into the first mixer 31; the pH of the wastewater is adjusted in the first mixer 31. Janus granule solution stirring tank 21 is connected to Janus granule solution storage tank 24 and Janus granule solution inlet in sequence via pipelines to prepare Janus granule solution and feed it into the second mixer 32. Flocculant stirring tank 22 is connected to flocculant storage tank 25 and flocculant inlet in sequence via pipelines to prepare flocculant solution and feed it into the third mixed liquid outlet 332.

[0030] The third mixed liquid outlet 332 is connected to the first separation tank 40 to allow the wastewater, which has undergone three mixing processes, to be introduced into the first separation tank 40 for sedimentation and separation. Please refer to... Figure 3 and Figure 5As shown, the first separation tank 40 includes a tank body 41 with an opening at the top, a plurality of parallel shelves 42 vertically arranged within the tank body 41, and a transition interface 43. The shelves 42 include a first shelf 421 and a second shelf 422 arranged at intervals. The bottom edge of the first shelf 421 is connected to the bottom of the tank body 41, and there is a gap between the bottom edge of the second shelf 422 and the bottom of the tank body 41. The top edge of the second shelf 422 is higher than the top edge of the first shelf 421. The second separation tank 60 is located on one side of the first separation tank 40, and the opening of the second separation tank 60 is lower than the opening of the first separation tank 40. The first mixer 31, the second mixer 32, and the third mixer 33 are arranged horizontally side-by-side above the second separation tank 60.

[0031] The adapter 43 is located on the side of the opening of the tank 41 near the second separation groove 60. Specifically, the adapter 43 includes a horizontal plate 431 on the side wall of the tank 41, an inclined plate 432 located at the edge of the horizontal plate 431 and inclined downwards, a vertical plate 433, and two side plates (not shown) connecting the horizontal plate 431, the inclined plate 432, and the vertical plate 433. The bottom edges of the vertical plate 433 and the inclined plate 432 form an opening, which is located above the second separation groove 60. The side wall of the tank 41 is bent inward to form a slope 411, and the installation height of the horizontal plate 431 is lower than the highest point of the slope 410.

[0032] Please refer to Figure 3 and Figure 6 As shown, the scraper mechanism 50 is located above the first separation tank 40 near the second separation tank 60, and is used to continuously scrape the Janus oil-sludge mixture (a mixture of oil soap and magnetic Janus particles) floating on the liquid surface in the first separation tank 40 into the second separation tank 60 for secondary sedimentation separation. The scraper mechanism 50 includes a drive motor (not shown), a transmission assembly 56, two sets of bearings 51 respectively disposed on both sides of the opening of the first separation tank 40, two rotating shafts 52 disposed on the bearings 51, sprockets 53 disposed at both ends of the rotating shafts 52, a chain 54 disposed on the sprockets 53, and scrapers 55 disposed on the chain 54 and moving with the chain 54. There are at least two scrapers 55, which are evenly distributed on the chain 54. The transmission assembly 56 includes a drive wheel 561 disposed on the output shaft of the drive motor, a driven wheel 563 disposed on one of the rotating shafts 52, and a chain 562 connecting the drive wheel 561 and the driven wheel 563.

[0033] Please refer to Figure 1 and Figure 2As shown, the post-treatment unit 70 is connected to the second separation tank 60 to separate the Janus oil-sludge mixture in the second separation tank 60. The post-treatment unit 70 includes a heating tank 71, a centrifuge 72, and an grease storage tank 73. The heating tank 71 is connected to the second separation tank 60, and a pump is provided between the heating tank 71 and the second separation tank 60. The Janus oil-sludge mixture in the second separation tank 60 is pumped into the heating tank 71 by the pump. The centrifuge 72 is connected to the heating tank 71, the Janus particle solution storage tank 24, and the grease storage tank 73, respectively. The centrifuge 72 is preferably a three-phase horizontal centrifuge. The heated Janus oil-sludge mixture is fed into the centrifuge 72 for three-phase separation (Janus particles, oil phase, and water phase).

[0034] The workflow of the integrated oil-water separation device based on magnetic snowman-shaped Janus particles in this embodiment is as follows: 1. Drug preparation and storage Janus granule solution is prepared in a Janus granule solution mixing tank and then introduced into a Janus granule solution storage tank for later use. Flocculant solution is prepared in a flocculant mixing tank and then introduced into a flocculant storage tank for later use. pH adjuster solution is prepared in a pH adjuster storage tank.

[0035] 2. Wastewater pretreatment Wastewater collection and transportation: Oily wastewater first flows into the wastewater storage tank through the inlet, completing the initial collection; after storage, the oily wastewater flows into the first mixer through the outlet of the wastewater storage tank by gravity.

[0036] pH monitoring and adjustment: A pH meter is installed at the outlet of the wastewater storage tank to monitor the pH value of oily wastewater in real time and feed the data back to the control system. Based on the feedback signal from the pH meter, the control system automatically controls the pumping volume of pH adjuster to accurately adjust the pH value of the wastewater to the set range.

[0037] Secondary mixing: After pH adjustment, the wastewater is fed into the second mixer. At this time, the Janus granule solution stored in the Janus granule solution storage tank is pumped into the second mixer and thoroughly mixed with the wastewater.

[0038] Three-stage mixing: The liquid after the second mixing is fed into the third mixer; subsequently, the flocculant stored in the flocculant tank is pumped into the third mixer to be further mixed with the liquid, eventually forming a suspension.

[0039] 3. Oil-water separation Magnetic Janus particle adsorption and separation: The suspension flows into the first separation tank and is left to stand in the tank; during this process, the magnetic snowman-shaped Janus particles in the suspension begin to selectively adsorb grease and soap in the wastewater; the magnetic Janus particles that have adsorbed grease / soap gradually float to the surface of the liquid in the first separation tank due to the decrease in their density.

[0040] Scraping and Transfer of Floating Matter: The floating matter (mainly Janus particles loaded with grease and soap, free grease, and free soap) accumulated on the surface of the first separation tank is continuously scraped off by the scraper mechanism and transferred to the secondary oil-water separation tank.

[0041] 4. Post-processing Secondary separation and particle recovery of floating matter: The floating matter undergoes secondary sedimentation in a secondary oil-water separation tank to further separate the oil phase and water phase.

[0042] Heating and stirring pretreatment: After secondary sedimentation, the oil-soap mixture containing magnetic Janus particles is pumped into a heating tank, where heating and stirring are carried out to create better conditions for subsequent separation.

[0043] Centrifugal separation and recovery: The heated and stirred mixture is pumped into a three-phase horizontal centrifuge for high-speed separation; the separated oil is fed into the grease storage tank 73 for further processing or storage; the separated magnetic Janus particles are transported back to the Janus particle solution mixing tank through a dedicated pipeline system to participate in the next oil-water separation cycle, realizing particle reuse; the separated aqueous phase is further processed or stored.

[0044] The terms used herein, such as “upper,” “lower,” “front,” and “back,” indicating relative spatial positions, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims.

[0045] Furthermore, the above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.

Claims

1. An integrated oil-water separation device based on magnetic snowman-shaped Janus particles, characterized in that: The system includes a first mixer, a second mixer, a third mixer, a first separation tank, a scraper mechanism, a second separation tank, and a post-treatment mechanism. The first mixer has a wastewater inlet, a pH adjuster inlet, and a first mixed liquid outlet. The second mixer has a first mixed liquid inlet connected to the first mixed liquid outlet, a Janus particle solution inlet, and a second mixed liquid outlet. The third mixer has a second mixed liquid inlet, a flocculant inlet, and a third mixed liquid outlet connected to the second mixed liquid outlet. The third mixed liquid outlet is connected to the first separation tank, which is located on one side of the first separation tank. The scraper mechanism is positioned above the side of the first separation tank closest to the second separation tank to scrape the Janus oil mixture on the surface of the liquid in the first separation tank into the second separation tank. The post-treatment mechanism is connected to the second separation tank to separate the Janus oil mixture in the second separation tank.

2. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 1, characterized in that: The first separation tank includes a tank body with an opening at the top and several parallel shelves vertically arranged in the tank body, the shelves being arranged along the scraping direction of the scraper mechanism.

3. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 2, characterized in that: The shelf includes a first shelf and a second shelf arranged at intervals in sequence. The bottom edge of the first shelf is connected to the bottom of the trough, and there is a gap between the bottom edge of the second shelf and the bottom of the trough. The top edge of the second shelf is higher than the top edge of the first shelf.

4. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 2, characterized in that: The scraper mechanism includes a drive motor, two sets of bearings located on both sides of the opening of the first separation groove, two rotating shafts on the bearings, sprockets at both ends of the rotating shafts, a chain on the sprockets, and a scraper on the chain that moves with the chain.

5. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 4, characterized in that: The number of scrapers is at least two, and they are evenly distributed on the chain.

6. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 1, characterized in that: The first mixer, the second mixer, and the third mixer each include an elongated outer shell and a stirring impeller disposed within the elongated outer shell. The first mixer, the second mixer, and the third mixer are arranged horizontally side by side.

7. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 6, characterized in that: The first mixed liquid outlet and the wastewater inlet are respectively located at the front and rear ends of the first mixer, the first mixed liquid inlet and the second mixed liquid outlet are respectively located at the front and rear ends of the second mixer, and the second mixed liquid inlet and the third mixed liquid outlet are respectively located at the front and rear ends of the third mixer.

8. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 1, characterized in that: It also includes a pH adjuster storage tank, a Janus granule solution storage tank, and a flocculant storage tank. The pH adjuster storage tank is connected to the pH adjuster inlet, the Janus granule solution storage tank is connected to the Janus granule solution inlet, and the flocculant storage tank is connected to the flocculant inlet.

9. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 1, characterized in that: It also includes a wastewater storage tank, which is located above the first mixer and is connected to the first mixer through the wastewater inlet.

10. The integrated oil-water separation device based on magnetic snowman-shaped Janus particles as described in claim 1, characterized in that: The post-processing unit includes a heating tank, a centrifuge, and an oil storage tank. The heating tank is connected to the second separation tank, and a pump is provided between the heating tank and the second separation tank. The Janus oil mixture in the second separation tank is pumped into the heating tank. The centrifuge is connected to the heating tank, the Janus particle solution storage tank, and the oil storage tank, respectively. The heated Janus oil mixture is fed into the centrifuge for solid-liquid separation. The separated oil is fed into the oil storage tank, and the separated Janus particles are fed into the Janus particle solution storage tank.

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