An oil slick structure

Abstract

The present invention discloses an oil floating structure, comprising a tank body, wherein the tank body is provided with a liquid inlet area, an oil floating area, and a liquid discharge area. An oil baffle is provided above the oil floating area and the liquid discharge area. Multiple layers of partitions are provided in parallel within the oil floating area, and the partitions divide the oil floating area into multiple oil floating layers along the height direction of the tank body. Flanges are provided around the bottom surfaces of the partitions, and the flanges and the bottom surfaces of the partitions form an oil collecting groove. An oil passage hole is provided through the partitions, and an oil guide pipe is provided on the oil passage hole. The oil guide pipe is used to guide the oil phase accumulated in the oil floating layer to float to the oil collecting groove on top of the upper oil floating layer. By providing the partitions and the oil guide pipe within the oil floating area, the present invention divides the oil floating area into multiple small-height oil floating layers, and simultaneously floats the oil, and directly guides the oil floating to float to the oil collecting groove of the upper oil floating layer, effectively shortening the vertical floating distance of the oil droplets. The invention has the advantages of rapid oil droplet aggregation, short required residence time, high treatment efficiency, good oil-water separation effect, and easy miniaturization design.

Description

Technical Field

[0001] The invention belongs to the technical field of gravity oil floating of oil-water separation equipment, and in particular relates to an oil floating structure with a small floating distance and a short residence time. Background Art

[0002] In oil-water separation technology, the oil floating process is one of the most important steps in achieving effective oil-water separation. The oil-water separation effect of the oil floating process depends on the time required for the oil droplets in the mixed liquid to float vertically and the length of time the mixed liquid remains in the oil floating device. Generally speaking, the shorter the vertical floating time of the oil droplets and the longer the residence time, the more thorough the oil-water separation and the better the separation effect. The vertical floating time of the oil droplets is affected by the size of the oil droplets and the vertical distance they float. The larger the oil droplets, the faster they float and the shorter the required floating time. The shorter the distance the oil droplets float, the shorter the required floating time. The residence time is affected by factors such as the flow rate of the mixed liquid and the flow length. The slower the flow rate and the longer the pipeline, the longer the floating time provided.

[0003] Most existing oil floating devices improve the oil-water separation effect by increasing the residence time of the mixed liquid within the oil floating device. Existing oil floating devices include: 1. Large-volume oil floating devices, which extend the effective residence time of the mixed liquid in the oil floating tank through large volume and slow flow rate; 2. Long-pipeline oil floating devices, which extend the flow path of the oil-water mixture to provide sufficient time for the oil droplets to float vertically. Some oil floating devices also adjust the vertical floating distance and flow rate of the oil droplets by controlling the pipeline aperture. The former usually requires the oil floating device to have a greater depth, which increases the floating distance of the oil droplets, to a certain extent extending the required residence time and restricting the improvement of treatment efficiency. The latter usually occupies a larger area, and the overly long and thin pipelines can easily make it difficult to collect the floating oil. To ensure the flow rate, this type of oil floating device usually also requires a higher flow rate. However, a high flow rate can easily cause the oil droplets to be impacted and micronized, which to a certain extent weakens the oil-water separation effect.

[0004] Therefore, the research direction of this application is to determine what kind of oil floating structure can make the oil floating device have a smaller volume, a shorter residence time, a larger flow rate and ensure a better oil-water separation effect. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil floating structure to overcome the above-mentioned defects.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention proposes an oil floating structure, comprising a tank body for a mixed liquid to stay, wherein a liquid inlet area, an oil floating area and a liquid discharge area are provided in the tank body, the liquid inlet area is connected to a liquid inlet, the liquid discharge area is provided with a drain outlet and / or an overflow plate, the tank body controls the liquid level in the tank body through the drain outlet or the overflow plate, an oil discharge outlet is provided at the liquid level above the oil floating area, an oil baffle is provided above the oil floating area and the liquid discharge area, the oil baffle blocks the floating oil on the top of the oil floating area so that the top of the oil floating area forms an oil storage area, and the oil baffle It is the boundary between the oil storage area and the liquid drainage area; it is characterized in that: the oil floating area is provided with multiple layers of parallel partitions, the partitions divide the oil floating area into multiple oil floating layers along the height direction of the tank body, the bottom surfaces of the partitions are provided with flanges around them, the flanges and the bottom surfaces of the partitions form an oil collecting groove, the partitions of each oil floating layer are penetrated by an oil hole, the oil hole is provided with an oil guide pipe, the oil guide pipe is used to guide the oil phase accumulated in the oil floating layer to float to the oil collecting groove on the top of any oil floating layer above, and finally float to the oil storage area;

[0008] Based on the above technical solution, by arranging partitions in the oil floating area, the oil floating area is divided into multiple smaller oil floating layers in the height direction. The mixed liquid flows through each oil floating layer at the same time in different height ranges and independently floats the oil. The accumulated oil phase is directly guided by the oil guide pipe to float to the oil collecting groove on the top of the upper oil floating layer and finally enters the water surface of the oil floating area (i.e., the oil storage area), thereby dividing the floating height of the oil droplets into small sections for independent floating, effectively shortening the vertical floating distance of each oil droplet. Even tiny oil droplets can be fully collected, thereby achieving the purpose of shortening the residence time of the mixed liquid while achieving a good oil-water separation effect. In addition, since the required oil droplet aggregation time is short, the flow length of the mixed liquid, that is, the length of the oil floating area, can be shortened, which is conducive to achieving a small volume of the oil floating structure. The oil floating structure has the advantages of fast oil droplet aggregation, short required residence time, high treatment efficiency, thorough oil-water separation, and easy miniaturization design.

[0009] Furthermore, a guide slope is provided in the oil collecting groove, and the oil through hole is provided at the end of the guide slope. This design is conducive to the oil droplets floating up and gathering and then quickly guiding them to the oil guide pipe for discharge through the guide slope, avoiding the oil layer being too thick, which causes the oil droplets at the oil-water interface to mix into the mixed liquid again and affect the oil-water separation effect.

[0010] Furthermore, the lower end of the oil guide pipe is connected to the oil collecting groove of the lower floating oil layer through the oil through hole, and the upper end of the oil guide pipe is opened to the oil storage area at the top of the floating oil area. The pipe wall of the oil guide pipe is provided with an oil through hole, and the oil through hole is connected to the oil collecting grooves of each floating oil layer passed through by the oil guide pipe. This design can quickly guide the oil layer accumulated in the lower floating oil layer to the top layer, and use the same oil guide pipe to simultaneously guide the accumulated oil droplets of multiple floating oil layers, which is beneficial to the rapid discharge of the accumulated oil droplets in each floating oil layer and simplifies the design of the oil guide structure.

[0011] Preferably, a support bar is provided in the tank body, and the partition is placed on the support bar to achieve positioning, and the support bar is used as the flange. This design can simplify the design of the partition and make assembly easier.

[0012] Preferably, the oil guide pipe of the top oil floating layer is connected to the oil through hole on the top partition plate, and the remaining oil floating layers are provided with support columns for supporting the partition plates. The support columns are hollow structures and are used as oil guide pipes. The top of the support column is fixedly connected to the bottom surface of the upper partition plate of the oil floating layer, and the bottom of the support column is supported on the lower partition plate of the oil floating layer and is connected to the oil through hole on the lower partition plate. The upper side wall of the support column is provided with an oil through hole, and the oil through hole is connected to the oil collecting groove at the top of the oil floating layer. This design forms multi-point support for the partition plate through the setting of the hollow support column, which can adapt to the setting of a larger partition plate without deformation affecting the flow of liquid. On the other hand, using the support column as an oil guide pipe is conducive to simplifying the structural design of the oil floating area.

[0013] More preferably, the oil-through hole is provided at the connection between the top of the support column and the upper partition of the floating oil layer in which it is located. The support columns in each floating oil layer are connected through the oil-through hole on the partition and finally connected to the oil guide pipe of the top floating oil layer. This design can directly guide the oil phase of the floating oil layer to the top floating oil layer and simultaneously collect the oil phases of multiple floating oil layers, with high oil discharge efficiency, which is beneficial to reducing the ratio of secondary mixing of accumulated oil droplets at the oil-water contact surface and improving the oil-water separation effect.

[0014] Furthermore, a uniform distribution plate is provided between the oil floating area and the liquid inlet area, and the uniform distribution plate is provided with flow holes, and the density of the flow holes gradually increases from top to bottom. This design can make the mixed liquid enter the oil floating layer evenly and preliminarily separate the larger oil droplets, and control the flow rate of each oil floating layer by changing the hole density, so that the upper oil floating layer allows the oil droplet aggregation thickness to be greater, which is conducive to the layer-by-layer collection and discharge of oil droplets; at the same time, because the upper oil droplets in the liquid inlet area are large and the lower oil droplets are small, the large flow rate of the lower layer can make the mixed liquid have sufficient oil droplets that can collide with each other to form large oil droplets, which are easier to gather and float, thereby improving the oil-water separation effect of the oil floating area.

[0015] Furthermore, the drainage area includes a liquid storage area and a water outlet area, the drainage port is connected to the water outlet area, the liquid storage area and the water outlet area are separated by interconnected vertical baffles and transverse baffles, and the transverse baffle is provided with an overflow pipe with adjustable height. This design can control the liquid level entering the water outlet area according to the thickness of the accumulated oil layer through the adjustability of the overflow pipe, thereby effectively avoiding the oil phase from being disturbed by the flow rate, or even discharged from the drainage port, thereby reducing the oil-water separation effect.

[0016] Furthermore, the liquid inlet area is provided with a coalescing device, the inlet end of the coalescing device is communicated with the liquid inlet, and the outlet end of the coalescing device is provided at the upper part of the liquid inlet area and communicated with the liquid inlet area;

[0017] Based on the above technical solution, the oil-water mixture passes through a coalescing device before the oil floats, causing the oil droplets to aggregate and grow into larger oil droplets. After the mixed liquid enters the liquid inlet area from the outlet end of the coalescing device, the oil droplets float directly, and the water phase gradually sinks and enters the oil floating area in layers. The initial oil-water separation in the liquid inlet area is faster and the degree of separation is higher, which effectively reduces the oil content of the mixed liquid entering the oil floating area, thereby allowing the flow rate of the oil floating area to be increased, further shortening the residence time of the mixed liquid in the device, and improving the treatment efficiency.

[0018] Furthermore, an air flotation device is provided at the bottom of the liquid inlet area to achieve preliminary aggregation and growth of oil droplets before the mixed liquid enters the oil floating area. Beneficial effects

[0019] The oil floating structure of the present invention has the following advantages or beneficial effects:

[0020] 1. By setting partitions in the oil floating area, the oil floating area is divided into multiple smaller oil floating layers in the vertical direction. The mixed liquid flows through the oil floating layers at different heights at the same time, and independent oil floating is carried out synchronously in the oil floating layers. The floating height of the oil droplets is divided into small sections and the floating height is carried out independently. This effectively shortens the vertical floating distance of each oil droplet. Even tiny oil droplets can be fully collected. In addition, since the floating distance of the oil droplets is short, the required oil droplet aggregation time is short, which can shorten the flow length of the oil floating area and realize the miniaturization of the oil floating structure. The oil floating structure has the advantages of fast oil droplet aggregation, short required residence time, high treatment efficiency, complete oil-water separation, and easy miniaturization design.

[0021] 2. By setting up oil guide pipes or support columns with oil guide pipe functions in the floating oil layer, the oil droplets gathered in each floating oil layer can be directly guided to float to the upper floating oil layer, reducing the proportion of re-mixing with the mixed liquid, and achieving more thorough and efficient oil-water separation.

[0022] 3. By setting a coalescence device or an air flotation device in the liquid inlet area, the oil droplets are first aggregated and grown into oil droplets with larger particle size, and the oil droplets are directly floated after the mixed liquid enters the liquid inlet area, and the water phase gradually sinks and enters the oil floating area in layers to achieve preliminary separation of oil and water, which is beneficial to improving the oil floating efficiency of the oil floating area and further improving the oil-water separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 This is a schematic structural diagram of Embodiment 1 of the present invention;

[0025] Figure 2 For the present invention Figure 1 An enlarged schematic diagram of part B;

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the AA surface;

[0027] Figure 4 This is a structural diagram of embodiment 2 of the present invention;

[0028] Figure 5 For the present invention Figure 4 Schematic diagram of the structure of part C;

[0029] Figure 6 This is a schematic structural diagram of embodiment 3 of the present invention;

[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the structure of part D;

[0031] Figure 8 This is a schematic diagram of the oil slick area structure according to the fourth embodiment of the present invention;

[0032] Figure 9 This is a structural diagram of Embodiment 5 of the present invention;

[0033] In the figure: tank body 100; liquid inlet area 101; oil floating area 102; oil storage area 102a; liquid discharge area 103; liquid storage area 103a; water outlet area 103b; liquid inlet 1; baffle 11; uniform distribution plate 2; flow hole 2a; partition plate 3; flange 33; oil collecting groove 3a; diversion slope 3a1; oil guide pipe 3b; oil guide pipe 3c; oil through hole 3c; oil through hole 3d; support column 3e; oil floating layer 4; bottom oil floating layer 4a; second oil floating layer 4b; top oil floating layer 4c; oil baffle 5; overflow plate 6; vertical baffle 61; horizontal baffle 62; overflow pipe 63; drain outlet 7; support bar 8; coalescing device 9; inlet end 9a; outlet end 9b. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the examples, but the embodiments of the present invention are not limited thereto. Example

[0035] This embodiment provides an oil floating structure, such as Figure 1 As shown, it includes a tank body 100 for the mixed liquid to stay, and the tank body 100 is provided with a liquid inlet area 101, an oil floating area 102 and a liquid discharge area 103. The liquid inlet area 101 is connected to the liquid inlet 1, and a baffle 11 is further provided in the liquid inlet area 101. The baffle 11 is arranged close to the liquid inlet 1. The two ends of the oil floating area 102 are respectively connected to the liquid inlet area 101 and the liquid discharge area 103. An oil baffle 5 is provided on the upper part between the oil floating area 102 and the liquid discharge area 103. The oil baffle 5 blocks the floating oil. The floating oil on the top of the oil area 102 forms an oil storage area 102a on the top of the oil floating area 102. The oil baffle 5 is the boundary between the oil storage area 102a and the drainage area 103. The drainage area 103 is connected to a drain port 7 and an overflow plate 6. The overflow plate 6 is arranged near the drain port 7. The tank body 100 controls the liquid level in the tank body 100 through the overflow plate 6. An oil drain port (not shown in the drawings) is arranged at the liquid level in the upper part of the oil floating area 102. The oil drain port is connected to the oil storage area 102a. The oil floating area 102 is provided with multiple layers of parallel partitions 3. The partitions 3 divide the oil floating area 102 into multiple oil floating layers 4 along the height direction of the tank body 100. The number of layers of the oil floating layers 4 is determined according to the required shortened residence time and the required flow rate. The height of each oil floating layer 4 can be the same or can be set according to actual needs, such as Figure 1 As shown, except for the top layer, the remaining oil floating layers 4 are of the same height. The partition plate 3 is provided with an oil hole 3d, and the oil hole 3d is provided with an oil guide pipe 3b. The bottom edge of the partition plate 3 is provided with a flange 33. The flange 33 and the bottom surface of the partition plate 3 form an oil collecting groove 3a of the oil floating layer. The oil collecting groove 3a at the top of each oil floating layer 4 is provided with a diversion slope 3a1. The diversion slope 3a1 can be provided separately, such as Figure 2 As shown, the bottom surface of the partition 3 can also be inclined, and the end of the guide slope 3a1 is provided with the oil hole 3d and the oil guide pipe 3b. The oil guide pipe 3b is used to guide the oil phase accumulated in the floating oil layer 4 directly to the oil collecting groove 3a at the top of any one of the floating oil layers 4 above. Specifically, Figure 1As shown, the oil guide pipe 3b and the oil through hole 3d are connected to two adjacent floating oil layers 4. The lower end of the oil guide pipe 3b is connected to the oil collecting groove 3a on the top of the lower floating oil layer through the oil through hole 3d. The upper end of the oil guide pipe 3b opens into the oil collecting groove of the floating oil layer (that is, the floating oil layer 4 where the oil guide pipe 3b is located). The oil droplets accumulated in the lower floating oil layer 4 are accommodated in the oil collecting groove 3a of this layer, and are guided along the guide slope 3a1 to the oil through hole 3d at the end, and are directly guided to float to the upper floating oil layer through the oil guide pipe 3b. In the oil collecting groove 3a at the top of the oil layer, and so on, the oil droplets gathered in each floating oil layer 4 float up layer by layer through the oil guide pipe 3b, and finally float up to the oil storage area 102a at the top of the floating oil area 102, and are discharged through the oil discharge port. In this process, the oil droplets gathered in the lower floating oil layer 4 do not need to float up and gather again through the mixed liquid in the upper floating oil layer 4, but are directly mixed with the oil phase gathered in the upper floating oil layer, so the oil-water separation efficiency is higher and the effect is better, thereby achieving the purpose of shortening the floating distance of the oil droplets and shortening the residence time of the liquid in the floating oil structure.

[0036] Furthermore, support bars 8 are provided at different heights in the tank body 100, and the partition 3 is placed on the support bar 8. The support bar 8 serves as a flange 33. The bottom surface of the partition 3 and the support bar 8 form an oil collecting groove 3a at the top of the floating oil layer 4. During actual use, the support bar 8 forms a support for the partition 3 while forming an obstruction and restriction on the flow of the mixed liquid, which helps to reduce the degree of disturbance of the accumulated oil droplets during the flow of the mixed liquid.

[0037] Furthermore, in order to make the mixed liquid enter each oil floating layer 4 evenly and make the oil droplets with larger particle size be trapped in the liquid inlet area 101, a uniform distribution plate 2 is provided between the oil floating area 102 and the liquid inlet area 101. Figure 3 As shown, the uniformly distributed plate 2 is provided with flow holes 2a, and the density of the flow holes 2a gradually increases from top to bottom to form flow control of each floating oil layer 4. The reason for this design is that: on the one hand, the closer to the upper layer, the higher the proportion of oil phase, the larger the oil droplets, the more oil droplets that need to be intercepted, and the smaller flow rate is suitable. On the contrary, the closer to the lower layer, the higher the proportion of water phase, the smaller the oil droplets (large oil droplets float up quickly and are not easy to stay in the lower layer), the larger the allowable flow rate, and a large flow rate can make the mixed liquid have sufficient oil droplets that can collide with each other to form large oil droplets, which are then easier to gather and float. On the other hand, the closer to the upper layer, the thicker the oil film on the top of the floating oil layer 4, and the lower flow rate is not easy to disturb the oil film, which is beneficial to prevent the oil droplets at the oil-water interface from being driven by the liquid flow and re-mixed into the mixed liquid, thereby reducing the oil-water separation effect.

[0038] Based on the above embodiments, the technical concept of the present invention is that: by providing the multi-layer partition plate 4 and the oil guide pipe 3b, the mixed liquid is divided into a plurality of liquid layers of small heights, i.e., the oil floating layer 4, when flowing in the oil floating area. Each liquid layer floats the oil simultaneously, and the floating and gathering height of the oil droplets is reduced by several times. Accordingly, the time required for the oil droplets to float is also shortened by several times. When the flow length is the same, the degree of oil-water separation is increased by several times. Figure 1 As shown, three oil floating layers 4 are provided within the oil floating area 102. The time required for oil droplets to float is reduced to one-third of the original time. The residence time of the mixed liquid within the tank body 100 is also reduced to one-third of the original time. Without changing the size of the tank body 100, the oil-water separation effect can be increased by approximately three times the original time, greatly improving separation efficiency. At the same time, due to the reduced height of the oil floating, the time it takes for oil droplets to reach the baffle is shortened. Even tiny oil droplets can collide, aggregate, and grow within the preset oil floating time, allowing them to be fully collected, further improving the oil-water separation effect. Furthermore, due to the effective reduction in floating time, this oil floating structure has greater flexibility in terms of flow rate, flow velocity control, and tank body volume design without affecting the oil-water separation effect. Therefore, this oil floating structure has the advantages of high processing efficiency, excellent oil-water separation effect, and ease of miniaturization. Example

[0039] This embodiment provides an oil floating structure, which differs from the first embodiment in that:

[0040] The oil guide pipe 3b passes through all the oil floating layers 4 above it from the oil floating layer 4 and extends to the oil storage area 102a at the top of the oil floating area 102. The lower end of the oil guide pipe 3b is connected to the oil collecting groove 3a at the top of the lower oil floating layer through the oil hole 3d. The upper end of the oil guide pipe 3b directly opens into the oil storage area 102a. The wall of the oil guide pipe 3b is provided with an oil through hole 3c. The oil through hole 3c is connected to the oil collecting groove 3a at the top of each oil floating layer 4 passed by the oil guide pipe 3b. In this embodiment, Figure 4 As shown, the oil floating area 102 is divided into a bottom oil floating layer 4a, a second oil floating layer 4b, and a top oil floating layer 4c from bottom to top. The oil guide pipe 3b connected to the bottom oil floating layer 4a passes through the second oil floating layer 4b and extends to the top oil floating layer 4c. The oil guide pipe 3b is provided with an oil through hole 3c (as shown in FIG. 1 ) on the wall of the pipe in the oil collecting groove 3a of the second oil floating layer 4b. Figure 5 When in use, the floating oil in the bottom floating oil layer 4a enters the oil guide pipe 3b through the oil hole 3d on the partition 3, and the floating oil in the second floating oil layer 4b enters the oil guide pipe 3b through the oil hole 3c, and finally floats to the oil storage area 102a at the top of the floating oil area 102.

[0041] Further, if Figure 4As shown, the drainage area 103 includes a liquid storage area 103a and a water outlet area 103b, the drain port 7 is connected to the water outlet area 103b, the liquid storage area 103a and the water outlet area 103b are separated by a vertical baffle 61 and a transverse baffle 62 connected to each other, and the transverse baffle 62 is provided with an overflow pipe 63 with adjustable height, and the overflow pipe 63 is threadedly connected to the transverse baffle 62. When in use, according to the thickness of the oil layer in the oil storage area 102a, the overflow pipe 63 is adjusted upward or downward so that the upper end of the overflow pipe 63 is located at a preset height, thereby allowing the water phase after oil-water separation to overflow from the pipe mouth into the water outlet area 103b.

[0042] The advantages of this embodiment are as follows: the oil layer accumulated in the lower floating oil layer can be quickly guided to the top layer through the oil guide pipe, and the accumulated oil droplets of multiple floating oil layers can be guided simultaneously by the same oil guide pipe, which is conducive to the rapid discharge of the accumulated oil droplets in each floating oil layer and simplifies the design of the oil guide structure; by adjusting the height of the overflow pipe 63, the height of the liquid level entering the water outlet area can be controlled according to the thickness of the accumulated oil layer, thereby effectively preventing the oil phase from being disturbed by the flow rate and even being discharged from the drain port, thereby reducing the oil-water separation effect.

[0043] Other components not described in this embodiment and the relative positions and connection relationships between the components are the same as those in the first embodiment. Example

[0044] This embodiment provides an oil floating structure, which differs from the first or second embodiment in that:

[0045] like Figure 6 As shown, the oil pipe 3b in the top oil floating layer 4c is connected to the oil hole 3d on the top partition 3, and the remaining oil floating layers 4 are provided with support columns 3e for supporting the partition 3. The support columns 3e are hollow structures and serve as the oil pipe 3b. Figure 7 As shown, the top of the support column 3e provided in the second oil floating layer 4b is fixedly connected to the bottom surface of the upper partition 3 of the second oil floating layer 4b, and the bottom is supported on the lower partition 3 of the second oil floating layer 4b and communicates with the oil through hole 3d on the lower partition 3. The upper end side wall of the support column 3e (i.e., the side wall close to the upper partition of the second oil floating layer 4b) is provided with an oil through hole 3c. The oil through hole 3c is communicated with the oil collecting groove 3a at the top of the second oil floating layer 4b. During use, the floating oil in the bottom oil floating layer 4a is guided into the oil collecting groove 3a at the top of the second oil floating layer 4b through the support column 3e.

[0046] The advantages of this embodiment are: through the provision of hollow support columns, on the one hand, multi-point support is formed for the partition, which can adapt to the provision of larger partitions without deformation affecting the flow of liquid; on the other hand, the support columns are used as oil guide pipes, and there is no need to set up additional oil guide pipes 3b, which is conducive to simplifying the structural design of the oil floating area. Example

[0047] This embodiment provides an oil floating structure, which differs from the third embodiment in that:

[0048] The oil hole 3d is provided at the connection between the top of the support column 3e and the upper partition 3 of the oil floating layer 4. The support column 3e in each oil floating layer 4 is connected through the oil hole 3d on the partition 3 and finally connected to the oil guide pipe 3b of the top oil floating layer. Figure 8 As shown, the oil floating structure is provided with four oil floating layers 4. The upper end of the support column 3e provided in the bottom oil floating layer 4a is communicated with the oil through hole 3d on the lower partition of the second oil floating layer 4b. The lower end of the support column 3e provided in the second oil floating layer 4b is communicated with the oil through hole 3d on the lower partition of the second oil floating layer 4b and further communicated with the support column 3e in the bottom oil floating layer 4a. The upper end is communicated with the oil through hole 3d on the lower partition of the third oil floating layer. The support column 3e in the third oil floating layer is similarly provided. The lower end of the oil guide pipe 3b of the top oil floating layer 4c is communicated with the oil through hole 3d on the lower partition of the oil floating layer. Finally, the oil floating area forms a common guide channel through the support columns provided in each oil floating layer 4, and directly floats to the oil storage area 102a at the top of the oil floating area 102.

[0049] The advantage of this embodiment is that, based on the third embodiment, the oil phase of the oil floating layer can be directly guided to the top oil floating layer by aligning the support columns 3e and the oil phases of multiple oil floating layers can be collected simultaneously, which has a high oil discharge efficiency, is conducive to reducing the ratio of secondary mixing of accumulated oil droplets at the oil-water contact surface, and improves the oil-water separation effect. Example

[0050] This embodiment provides an oil floating structure, which differs from the first to fourth embodiments in that:

[0051] like Figure 9 As shown, the liquid inlet area 101 is provided with the coalescing device 9, the inlet end 9a of the coalescing device 9 is connected to the liquid inlet 1, and the outlet end 9b of the coalescing device 9 is provided at the upper part of the liquid inlet area 101 and is connected to the liquid inlet area 101; the coalescing device 9 can be various types of coalescing devices such as box-type, column-type, etc.

[0052] During use, the oil-water mixture first flows through the coalescing device 9 before entering the liquid inlet area 101. The coalescing device 9 causes the oil droplets to aggregate and grow into oil droplets with larger particle size. The coalesced mixture enters the upper part of the liquid inlet area 101 from the outlet end 9b of the coalescing device 9. The oil droplets float directly, and the water phase gradually sinks and continues to separate oil and water during the sinking process. In addition, when the water phase sinks, it also enters the oil floating layer 4 in the oil floating area 102 in different height ranges in layers for oil floating.

[0053] The advantage of this embodiment lies in the fact that the coalescing device 9 is directly arranged within the liquid inlet area 101, and the coalesced oil-water mixture is directly separated within the liquid inlet area 101. Compared with the structure of existing oil-water separation devices that first coalesce and then introduce the mixed liquid into the oil floating equipment for oil floating, this embodiment can achieve preliminary oil-water separation before oil floating, and the separation speed is fast and the separation degree is high. This effectively reduces the oil content of the mixed liquid entering the oil floating area 102, thereby allowing for an increase in the flow rate of the oil floating area 102, further shortening the residence time of the mixed liquid within the device, and improving the device's treatment efficiency. This device integrates both coalescing and oil floating functions, and has the advantages of a simple device structure, a large flow rate, thorough oil-water separation, and high treatment efficiency. Example

[0054] This embodiment provides an oil floating structure, which differs from the fifth embodiment in that:

[0055] An air flotation device is provided at the lower portion of the liquid inlet area 101. The air flotation device can be a conventional air flotation device used for oil-water separation in the prior art. Through the air flotation device, the oil droplets in the mixed liquid of the inlet liquid are aggregated and grown, and the oil and water are initially separated as they float upward densely, thereby reducing the oil content of the mixed liquid entering the oil floating area; at the same time, the bubbles that have not yet had time to float upward enter the various oil floating layers with the mixed liquid, and continue to collect oil droplets in each oil floating layer, thereby further increasing the oil droplet aggregation speed and thus improving the oil-water separation effect.

[0056] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of protection of the present invention.

Claims

1. An oil floating structure, comprising a tank body for a mixed liquid to stay, wherein the tank body is provided with a liquid inlet area, an oil floating area, and a liquid discharge area, the liquid inlet area being connected to a liquid inlet, the liquid discharge area being provided with a drain outlet and / or an overflow plate, the tank body controlling the liquid level in the tank body via the drain outlet or the overflow plate, an oil discharge outlet being provided at the liquid level above the oil floating area, an oil baffle being provided above the oil floating area and the liquid discharge area, the oil baffle intercepting the floating oil on the top of the oil floating area so that the top of the oil floating area forms an oil storage area, and the oil baffle serves as a boundary between the oil storage area and the liquid discharge area; and characterized in that: The oil floating area is provided with multiple layers of parallel partitions, which divide the oil floating area into multiple oil floating layers along the height direction of the trough body. Flanges are provided around the bottom surface of the partition, and the flanges and the bottom surface of the partition form an oil collecting groove. An oil through hole is penetrated by the partition of each oil floating layer, and an oil guide pipe is provided on the oil through hole. The oil guide pipe is used to guide the oil phase accumulated in the oil floating layer to float to the oil collecting groove on the top of any oil floating layer above and finally float to the oil storage area.

2. The oil floating structure according to claim 1, characterized in that: A guide slope is provided in the oil collecting groove, and the oil passage hole is provided at the end of the guide slope.

3. The oil floating structure according to claim 1, characterized in that: The lower end of the oil guide pipe is connected to the oil collecting groove of the lower floating oil layer through the oil hole, and the upper end of the oil guide pipe is opened to the oil storage area on the top of the floating oil area. The pipe wall of the oil guide pipe is provided with an oil through hole, and the oil through hole is connected to the oil collecting grooves of each floating oil layer passed through by the oil guide pipe.

4. The oil floating structure according to claim 1, characterized in that: The oil guide pipe of the top oil floating layer is connected to the oil hole on the top partition plate, and the remaining oil floating layers are provided with a support column for supporting the partition plate. The support column is a hollow structure and is used as an oil guide pipe. The top of the support column is fixedly connected to the bottom surface of the upper partition plate of the oil floating layer, and the bottom of the support column is supported on the lower partition plate of the oil floating layer and is connected to the oil hole on the lower partition plate. The upper end side wall of the support column is provided with an oil hole, and the oil hole is connected to the oil collecting groove at the top of the oil floating layer.

5. The oil floating structure according to claim 4, characterized in that: The oil holes are provided at the connection between the top of the support column and the upper partition of the oil floating layer. The support columns in each oil floating layer are connected through the oil holes on the partition and finally connected to the oil guide pipe of the top oil floating layer.

6. The oil floating structure according to claim 1, characterized in that: A uniform distribution plate is provided between the oil floating area and the liquid inlet area. The uniform distribution plate is provided with flow holes. The density of the flow holes increases gradually from top to bottom.

7. The oil floating structure according to claim 1, characterized in that: The drainage area includes a liquid storage area and a water outlet area, the drain port is connected to the water outlet area, the liquid storage area and the water outlet area are separated by interconnected vertical baffles and horizontal baffles, and the horizontal baffle is provided with an overflow pipe with adjustable height.

8. The oil floating structure according to claim 1, characterized in that: The liquid inlet area is provided with a coalescing device, the inlet end of the coalescing device is communicated with the liquid inlet, and the outlet end of the coalescing device is provided at the upper part of the liquid inlet area and is communicated with the liquid inlet area.

9. The oil floating structure according to claim 1, characterized in that: An air flotation device is provided at the lower part of the liquid inlet area.

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