An oil-water separation device for water treatment

Abstract

The present application discloses an oil-water separation device for water treatment, including a separation tank, a water inlet pipe is provided at the bottom of the separation tank, a drainage pipe is provided at the other side of the bottom of the separation tank, a partition plate is vertically slidably connected in the separation tank, the density of the partition plate is less than that of water and greater than that of oil, the upper surface of the partition plate is covered with oil-absorbing felt, and the oil-absorbing felt extends to the bottom of the partition plate through the oil discharge hole; an oil-collecting mechanism is provided on the partition plate for collecting oil and discharging it from the separation tank. The partition plate is located above the water inlet pipe, and oil-water mixed sewage is introduced into it. Naturally floating oil and oil particles mixed in the sewage will be attracted to the top of the partition plate through the oil discharge hole under the action of the oil-absorbing felt, and the partition plate will float between the sewage and the oil to complete the separation, and then be collected and discharged through the oil collection mechanism; the floating partition plate can adapt to the current amount of sewage discharged into the separation tank.

Description

Technical Field

[0001] This application belongs to the field of sewage treatment, and particularly relates to an oil-water separation device for water treatment. Background Art

[0002] During the sewage treatment process, especially in the treatment of urban domestic sewage, it is necessary to perform pre-separation treatment on the sewage to separate the doped oily liquids, so as to facilitate subsequent precipitation, coagulation treatment and other operations, and avoid a large amount of oil pollution affecting sewage treatment equipment. For example, oil pollution blocks the chemical liquid spray nozzles, and oil accumulation blocks the drainage outlets.

[0003] Existing oil-water separation devices, such as an oil-water separation device and an oil-water separation method with the application number CN202111190807.2, use a filtration system to separate oil and water. This method is only suitable for water removal operations of fuels such as aviation kerosene, and is not applicable to the small amount of oil pollution contained in sewage. There are also some methods that, based on the principle that oil is lighter than water, use sedimentation tanks to automatically float the oil pollution to the surface for cleaning. Although it is suitable for treating a large amount of sewage, it requires a larger sewage tank, resulting in a significant increase in land occupation area, increased costs, and wasted land resources.

[0004] Therefore, a new type of oil-water separation device for water treatment is needed to solve the above problems. Summary of the Invention

[0005] To solve the deficiencies of the existing technology described above, this application provides an oil-water separation device for water treatment, which can quickly separate oil and water in sewage, and has a small volume and good separation effect.

[0006] The technical effects to be achieved by this application are realized through the following solutions:

[0007] According to the first aspect of this application, there is provided an oil-water separation device for water treatment, including a separation tank. An inlet pipe is provided at the bottom of the separation tank, and a drain pipe is provided on the other side of the bottom of the separation tank. A partition plate is vertically slidably connected in the separation tank. The density of the partition plate is less than that of water and greater than that of oil. An oil-absorbing felt is covered on the upper surface of the partition plate, and the oil-absorbing felt extends to the lower part of the partition plate through an oil discharge hole. An oil pollution collection mechanism is provided on the partition plate for collecting oil pollution and discharging it from the separation tank.

[0008] With this solution, the partition board is located above the water inlet pipe. When the oil-water mixed sewage is introduced into it, the naturally floating oil and the oil particles mixed in the sewage will be attracted above the partition board through the oil drainage holes under the action of the oil-absorbing felt. The partition board will float between the sewage and the oil to complete the separation, and then be collected and discharged through the oil collection mechanism; the floating partition board can adapt to the current sewage volume discharged into the separation tank, ensuring that the oil is always isolated above the partition board for collection, rather than collecting the sewage at the bottom of the partition board.

[0009] Preferably, the separation tank includes a separation chamber and an oil drainage chamber. The separation chamber is conical, the oil drainage chamber is arranged at the top of the separation chamber, the water inlet pipe is connected tangentially to the separation chamber, the drain pipe is communicated with one side of the bottom of the separation chamber, and the partition board is slidably connected to the oil drainage chamber.

[0010] With this solution, the introduced sewage will generate a vortex shape. Due to the greater density of water, the oil will be squeezed to the central part during the rotation due to centrifugal force; the conical separation tank can gather the oil converging at the center upward due to the greater density of water, making it more convenient to collect the oil; the drain pipe located at the outer periphery of the bottom can discharge the separated sewage without discharging the oil.

[0011] Preferably, the bottom surface of the partition board is conical with a central downward convexity, and the oil drainage holes are arranged at the center of the partition board.

[0012] With this solution, the conical partition board fits better with the vortex-shaped water surface, facilitating the collection and adsorption of the oil with a central depression.

[0013] Preferably, an air diffuser pipe is arranged at the bottom of the separation chamber, and the air diffuser pipe discharges air bubbles into the separation chamber.

[0014] With this solution, the air bubbles introduced into the separation chamber can stir the oil-water mixed sewage, entrain the oil particles to float upward and gather in the middle, improving the efficiency of oil-water separation.

[0015] Preferably, the oil collection mechanism includes an oil scraping mechanism and an oil absorption mechanism. The oil scraping mechanism is used to squeeze the oil on the oil-absorbing felt into the oil storage tank around the partition board; the oil absorption mechanism is used to discharge the oil in the oil storage tank out of the oil drainage chamber.

[0016] With this solution, the oil storage tank is arranged around the partition board and is formed by the depression of the partition board, which can temporarily store the oil; the oil absorption mechanism timely discharges the oil in the oil storage tank to avoid accumulation.

[0017] Preferably, the oil scraping mechanism includes an oil scraping motor, a telescopic drive rod, and an oil scraping impeller. The oil scraping impeller is rotatably connected to the center of the partition plate. The oil scraping impeller is connected to the oil scraping motor through the telescopic drive rod, and the oil scraping motor is fixed to the top of the separation tank.

[0018] With this solution, the oil scraping impeller can rotate to squeeze the oil on the oil-absorbing felt, extruding the oil into the oil storage tank; by cyclically squeezing the oil-absorbing felt, it can also play a pumping role, and the timely discharged oil enables the oil-absorbing felt to continuously absorb the oil below under the siphon effect.

[0019] Preferably, a number of blades are evenly arranged on the outer periphery of the oil scraping impeller, and the blades are all arranged obliquely away from the moving direction.

[0020] With this solution, the orientation of the blades can guide the oil towards the outer oil storage tank, preventing the oil from being re-absorbed by the oil-absorbing felt after extrusion and being unable to be discharged.

[0021] Preferably, the telescopic drive rod includes a drive sleeve and a drive rod. The drive rod is connected to the oil scraping motor through a coupling. The drive sleeve is slidably connected to the drive rod and has a fixed angle. The drive sleeve is fixed to the center of the oil scraping impeller.

[0022] With this solution, the telescopic drive rod can ensure that when the partition plate floats up and down, it always drives the oil scraping impeller, improving the flexibility during use.

[0023] Preferably, the oil absorption mechanism includes an oil absorption pump and an oil absorption pipeline. A part of the oil absorption pipeline is a flexible hose, and the flexible hose extends downward into the oil storage tank; the oil absorption pump is fixed to the top of the separation tank.

[0024] With this solution, the flexible hose can be coiled into the oil storage tank and adapt to partition plates of different heights. The up and down floating will not affect the operation of the oil absorption pipeline, improving flexibility and reliability.

[0025] Preferably, sliding grooves are provided around the partition plate, and slide rails matching the sliding grooves are provided on the inner wall of the oil discharge cavity.

[0026] With this solution, the cooperation of the slide rails and the sliding grooves can improve the stability during use, prevent the partition plate from rotating following the rotation of the oil scraping impeller, and ensure the smooth progress of the oil scraping operation.

[0027] According to an embodiment of the present application, the effect of adopting this oil-water separation device for water treatment is that the oil-water mixed sewage can be directly introduced to complete the oil-water separation and discharge, which can improve the oil-water separation efficiency, and is small in size, convenient to use, and has a better separation effect. Description of the Drawings

[0028] To more clearly illustrate the embodiments of the present application or the existing technical solutions, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the existing technical solutions. Obviously, the accompanying drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of an oil-water separation device for water treatment in an embodiment of the present application;

[0030] Figure 2 For Figure 1 It is a schematic cross-sectional structure diagram of the oil-water separation device for intermediate water treatment;

[0031] Figure 3 For Figure 2 It is a schematic cross-sectional structure diagram of the partition board;

[0032] Figure 4 For Figure 3 It is a schematic structural diagram of the support frame;

[0033] Figure 5 For Figure 2 It is a schematic top view structure diagram of the partition board;

[0034] Figure 6 For Figure 2 It is a schematic cross-sectional structure diagram of the oil discharge chamber;

[0035] Figure 7 For Figure 2 It is a schematic structural diagram of the telescopic drive rod;

[0036] Figure 8 For Figure 7 It is a schematic cross-sectional structure diagram of the telescopic drive rod. Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the present application clearer, the following will clearly and completely describe the technical solutions of the present application in conjunction with specific embodiments and the corresponding accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0038] As Figures 1 to 8As shown in the figure, an oil-water separation device for water treatment in an embodiment of the present application includes a separation tank 100. A water inlet pipe 110 is provided at the bottom of the separation tank 100, and a drain pipe 120 is provided on the other side of the bottom of the separation tank 100. A partition plate 200 is vertically slidably connected in the separation tank 100. The density of the partition plate 200 is less than that of water and greater than that of oil. An oil-absorbing felt 210 covers the upper surface of the partition plate 200, and the oil-absorbing felt 210 extends below the partition plate 200 through an oil drain hole; an oil stain collection mechanism is provided on the partition plate 200 for collecting oil stains and discharging them from the separation tank 100.

[0039] The oil-absorbing felt 210 is made of, for example, polypropylene fiber felt, polyurethane foam, polystyrene fiber, polypropylene melt-blown fiber or non-woven fabric, etc., and has the characteristics of being oil-loving and water-repellent. It can use the siphon effect to adsorb the grease onto the oil-absorbing felt 210 above the partition plate 200, while the sewage remains below the partition plate 200 for easy discharge.

[0040] The oil-absorbing felt 210 is fixed to the partition plate 200 by means of bonding or snap-fastening, etc.

[0041] Through the solution of this embodiment, the partition plate 200 is located above the water inlet pipe 110. When the oil-water mixed sewage is introduced into it, the naturally floating oil stains and the oil stain particles mixed in the sewage will be attracted above the partition plate 200 through the oil drain hole under the action of the oil-absorbing felt 210. The partition plate 200 will float between the sewage and the oil stains to complete the separation, and then be collected and discharged through the oil stain collection mechanism; the floating partition plate 200 can adapt to the current amount of sewage discharged into the separation tank 100, ensuring that the oil stains are always isolated above the partition plate 200 for collection, rather than collecting the sewage at the bottom of the partition plate 200.

[0042] A water pump is connected to the water inlet pipe 110, and a ball valve is connected to the drain pipe 120, which can open the ball valve for discharge after a certain period of discharge to avoid directly discharging and affecting the separation effect.

[0043] The partition plate is, for example, made by plastic blow molding, filled with grease or a certain amount of water, ensuring that it can float on the water surface and sink into the grease, so as to play a good separation role.

[0044] In an embodiment of the present application, the separation tank 100 includes a separation chamber 102 and an oil discharge chamber 101. The separation chamber 102 is conical, the oil discharge chamber 101 is arranged at the top of the separation chamber 102, the water inlet pipe 110 is tangentially connected to the separation chamber 102, the drain pipe 120 communicates with one side of the bottom of the separation chamber 102, and the partition plate 200 is slidably connected to the oil discharge chamber 101. The introduced sewage will generate a vortex shape. Since the density of water is greater, the oil stains will be squeezed to the central part due to centrifugal force during the rotation process;

[0045] The conical separation tank 100 can gather the oil stains converging at the center upward because of the greater density of water, making it more convenient to collect the oil stains; the drain pipe 120 located on the outer periphery of the bottom can discharge the separated sewage without discharging the oil stains.

[0046] In an embodiment of the present application, the bottom surface of the partition plate 200 is a conical shape convex downward at the center, and the oil discharge hole is arranged at the center of the partition plate 200. The conical partition plate 200 fits more closely to the shape of the swirling water surface, facilitating the collection and adsorption of the oil stains in the sunken center.

[0047] The oil-absorbing felt 210 can extend downward from the oil discharge hole into the separation chamber 102, and can extend below the central liquid level in the sewage swirl, ensuring the absorption of oil stains and improving the reliability.

[0048] In an embodiment of the present application, an air diffuser pipe 130 is arranged at the bottom of the separation chamber 102, and the air diffuser pipe 130 discharges air bubbles into the separation chamber 102. The air bubbles introduced into the separation chamber 102 can stir the oil-water mixed sewage, entrain the oil stain particles to float upward and gather towards the middle, improving the efficiency of oil-water separation.

[0049] In an embodiment of the present application, the oil stain collection mechanism includes an oil scraping mechanism 310 and an oil absorption mechanism 320. The oil scraping mechanism 310 is used to squeeze the oil on the oil-absorbing felt 210 into the oil storage tank 220 around the partition plate 200; the oil absorption mechanism 320 is used to discharge the oil stains in the oil storage tank 220 out of the oil discharge chamber 101. The oil storage tank 220 is arranged around the partition plate 200 and is formed by the depression of the partition plate 200, which can temporarily store the oil stains; the oil absorption mechanism 320 timely discharges the oil stains in the oil storage tank 220 to avoid accumulation.

[0050] In an embodiment of the present application, the oil scraping mechanism 310 includes an oil scraping motor 311, a telescopic driving rod 312 and an oil scraping impeller 313. The oil scraping impeller 313 is rotatably connected to the center of the partition plate 200, the oil scraping impeller 313 is connected to the oil scraping motor 311 through the telescopic driving rod 312, and the oil scraping motor 311 is fixed to the top of the separation tank 100. The oil scraping impeller 313 can rotate to squeeze the oil stains on the oil-absorbing felt 210 and extrude the oil stains into the oil storage tank 220; by continuously squeezing the oil-absorbing felt 210, it can also play a pumping role, and the timely discharged oil stains enable the oil-absorbing felt 210 to continuously absorb the oil stains below under the siphon effect.

[0051] A support frame 230 is arranged on the top of the partition plate 200. A plurality of legs 231 are arranged around the support frame 230. The legs 231 extend downward through the oil-absorbing felt 210 and are fixed to the partition plate 200. The oil scraping impeller 313 is rotatably connected to the support frame 230, avoiding directly contacting the oil-absorbing felt 210 and rolling it up.

[0052] In an embodiment of the present application, a plurality of blades 3131 are evenly arranged on the outer periphery of the oil scraping impeller 313, and the blades 3131 are all arranged obliquely away from the moving direction. The orientation of the blades 3131 can direct the oil stain towards the outer oil storage tank 220, preventing it from being re-absorbed by the oil absorbent felt 210 after extrusion and being unable to be discharged.

[0053] The oil storage tank 220 is formed by the depression around the partition plate 200. The height of the oil absorbent felt 210 is greater than the side wall of the oil storage tank 220, enabling the oil stain to directly flow into the oil storage tank 220 under the extrusion of the blades 3131 and be discharged in time through the oil absorption mechanism 320, avoiding repeated inhalation by the oil absorbent felt 210.

[0054] In an embodiment of the present application, the telescopic drive rod 312 includes a drive sleeve 3121 and a drive rod 3122. The drive rod 3122 is connected to the oil scraping motor 311 through a coupling. The drive sleeve 3121 is slidably connected to the drive rod 3122 with a fixed angle, and the drive sleeve 3121 is fixed to the center of the oil scraping impeller 313. The telescopic drive rod 312 can ensure that the oil scraping impeller 313 is always driven when the partition plate 200 floats up and down, improving the flexibility during use.

[0055] Splines are provided on the outer periphery of the drive rod 3122, and spline grooves are provided on the inner wall of the drive sleeve 3121 to ensure the driving connection between the drive rod 3122 and the drive sleeve 3121, and the drive sleeve 3121 can move up and down at any time to adapt to the vertical displacement of the partition plate 200.

[0056] A support net 140 is also provided in the separation tank 100 to support the telescopic drive rod 312, reduce the vibration during its rotation, and improve the reliability.

[0057] In an embodiment of the present application, the oil absorption mechanism 320 includes an oil absorption pump 321 and an oil absorption pipeline 322. A part of the oil absorption pipeline 322 is a flexible hose 3221, and the flexible hose 3221 extends downward into the oil storage tank 220; the oil absorption pump 321 is fixed to the top of the separation tank 100. The flexible hose 3221 can be coiled into the oil storage tank 220 and adapt to the partition plate 200 at different heights. The up and down floating will not affect the operation of the oil absorption pipeline 322, improving the flexibility and reliability.

[0058] A lead block can be fixed to the end of the flexible hose 3221 of the oil absorption pipeline 322 to ensure that it always sinks to the bottom of the oil storage tank 220 to complete the oil absorption task; the end of the flexible hose 3221 can also be directly fixed to the bottom of the oil storage tank 220 to further improve the reliability, and the length of the flexible hose 3221 coiled into the oil storage tank 220 is greater than the vertical movement stroke of the partition plate 200.

[0059] In an embodiment of the present application, sliding grooves 240 are provided around the partition plate 200, and slide rails 103 matching the sliding grooves 240 are provided on the inner wall of the oil drainage cavity 101. The cooperation between the slide rails 103 and the sliding grooves 240 can improve the stability during use, prevent the partition plate 200 from rotating following the rotation of the oil scraping impeller 313, and ensure the smooth progress of the oil scraping operation.

[0060] According to this embodiment, the effect of adopting this oil-water separation device for water treatment is that the oil-water mixed sewage can be directly introduced to complete the oil-water separation and discharge, which can improve the oil-water separation efficiency, and it is small in size, convenient to use, and has a better separation effect.

[0061] It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that these terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0064] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0065] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the corresponding explanations for the spatial relative descriptions used herein will be made.

[0066] In the foregoing detailed description, reference has been made to the accompanying drawings, which form a part hereof. In the drawings, like symbols typically identify like components, unless the context indicates otherwise. The illustrated embodiments described in the detailed description, the drawings, and the claims are not meant to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein.

[0067] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An oil-water separation device for water treatment, comprising a separation tank, a water inlet pipe is arranged at the bottom of the separation tank, and a drain pipe is arranged on the other side of the bottom of the separation tank, characterized in that: A partition plate is vertically slidably connected in the separation tank, the density of the partition plate is less than that of water and greater than that of oil, the upper surface of the partition plate is covered with oil-absorbing felt, and the oil-absorbing felt extends to the bottom of the partition plate through the oil discharge hole; an oil collection mechanism is provided on the partition plate for collecting oil and discharging it from the separation tank; The separation tank comprises a separation chamber and an oil drain chamber, the separation chamber is conical, the oil drain chamber is arranged at the top of the separation chamber, the water inlet pipe is tangentially connected to the separation chamber, the drain pipe is connected to one side of the bottom of the separation chamber, and the partition plate is slidably connected to the oil drain chamber; The bottom surface of the partition plate is a cone with a downward protrusion in the center, and the oil drain hole is arranged in the center of the partition plate; the oil collection mechanism includes an oil scraping mechanism and an oil suction mechanism, the oil scraping mechanism is used to squeeze the oil on the oil absorption felt into the oil storage tank around the partition plate; the oil suction mechanism is used to discharge the oil in the oil storage tank into the oil drain cavity; The oil scraping mechanism includes an oil scraping motor, a telescopic driving rod and an oil scraping impeller, wherein the oil scraping impeller is rotatably connected to the center of the partition plate, the oil scraping impeller is connected to the oil scraping motor through the telescopic driving rod, and the oil scraping motor is fixed to the top of the separation tank.

2. The oil-water separation device for water treatment according to claim 1, characterized in that: An aeration pipe is arranged at the bottom of the separation chamber, and the aeration pipe discharges air bubbles into the separation chamber.

3. The oil-water separation device for water treatment according to claim 1, characterized in that: A plurality of blades are evenly arranged on the outer circumference of the oil scraping impeller, and the blades are all arranged in an inclined manner away from the moving direction.

4. The oil-water separation device for water treatment according to claim 1, characterized in that: The telescopic driving rod comprises a driving sleeve and a driving rod, wherein the driving rod is connected to the oil scraping motor via a coupling, the driving sleeve is slidably connected to the driving rod and has a fixed angle, and the driving sleeve is fixed to the center of the oil scraping impeller.

5. The oil-water separation device for water treatment according to claim 1, characterized in that: The oil suction mechanism comprises an oil suction pump and an oil suction pipeline, a part of the oil suction pipeline is a hose, and the hose extends downward into the oil storage tank; the oil suction pump is fixed to the top of the separation tank.

6. The oil-water separation device for water treatment according to claim 1, characterized in that: The partition plate is provided with sliding grooves around its periphery, and the inner wall of the oil drain cavity is provided with sliding rails matching the sliding grooves.

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