Floating oil tank

Abstract

The floating oil tank structurally comprises a tank body, a liquid inlet, a water outlet and an oil outlet, a plurality of layers of partition plates are arranged in the tank body in parallel in the water flow direction, the head ends and the tail ends of the partition plates are arranged in a staggered mode and divide the tank body into a plurality of layers, and the layers are sequentially communicated to form a flow channel. The flow directions of liquid in the flow channels in the adjacent layers are opposite, the flow directions of the liquid in the interval layers are the same, oil passing holes are formed in the partition plates in a penetrating mode, and the oil passing holes are upwards communicated with the upper layers. The multiple layers of partition plates with the oil passing holes are arranged in the tank body in parallel, the inner space of the tank body is divided into the multiple layers with the small floating height, oil droplets float and gather in each layer in the flowing process of mixed liquid, and segmented floating and layered oil collection of the oil droplets in the mixed liquid are achieved; the oil-water separator has the characteristics of long overflowing path, compact structure, small occupied area, small vertical floating distance of oil droplets in each layer, short required oil slick time and thorough oil-water separation.

Description

Technical Field

[0001] The utility model belongs to the technical field of floating oil devices, and particularly relates to a floating oil tank. Background Art

[0002] In the oil-water separation technology, the floating oil process is one of the important processes to achieve the oil-water separation effect. The oil-water separation effect is affected by various factors, such as the size of oil droplets, the length of floating oil time, the floating distance of oil droplets, the flow rate of the oil-water mixture, the pipeline length, etc. Generally speaking, the oil-water separation effect is proportional to the total floating oil time and the pipeline length, and inversely proportional to the floating distance of oil droplets and the flow rate of the oil-water mixture. Among them, there is a certain mutual restriction between the total floating oil duration, the flow rate, and the pipeline length, that is, the faster the flow rate and / or the shorter the pipeline, the shorter the allowed total floating oil time, and the less complete the separation. On the contrary, the slower the flow rate and / or the longer the pipeline, the longer the allowed total floating oil duration, and the better the separation effect. In actual applications, to ensure production efficiency, the floating oil process usually requires a certain flow rate. On the premise of a given flow rate, the existing setting forms of the floating oil process include: First, a large-depth floating oil tank is used to reduce the flow rate of the oil-water mixture in the floating oil tank and extend its residence time in the floating oil tank to increase the floating oil time. However, this method usually requires a large volume of the floating oil tank to ensure the flow rate, and at the same time, the large depth will also cause the floating distance of oil droplets to become larger, weakening the oil-water separation effect to a certain extent; Second, a long-pipeline floating oil tank is used to extend the flow path length of the oil-water mixture and provide sufficient floating time for oil droplets in the vertical direction. The vertical floating distance and flow rate of oil droplets can be controlled through the pipeline aperture. However, this method usually requires a large site due to the length requirement of the pipeline, and the too-long pipeline is not conducive to the collection of floating oil. Therefore, the research direction of this application is: what kind of floating oil tank structure can meet the requirements of small site occupation, small floating distance of oil droplets, short floating oil time, and ensure the required flow rate for production. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a floating oil tank to solve the problem that the existing floating oil tank cannot simultaneously take into account production efficiency, site occupation, and oil-water separation effect by extending the total floating oil duration to improve the oil-water separation effect.

[0004] The utility model is realized through the following technical solutions:

[0005] The utility model provides a floating oil tank, the structure of which includes a tank body, a liquid inlet, a drain outlet, and an oil drain outlet. A plurality of layers of partition plates are arranged in parallel along the water flow direction in the tank body. The head and tail of the partition plates are arranged in a staggered manner and divide the tank body into multiple layers. The layers are sequentially connected to form a flow channel. The liquid in the flow channel flows in opposite directions in adjacent layers and in the same direction in alternating layers. The partition plates are provided with oil passing holes, and the oil passing holes communicate upward with the upper layers.

[0006] Based on this technical solution, by arranging multiple layers of partitions with oil passing holes in parallel in the tank body, the internal space of the tank body is divided into multiple layers with a relatively small floating height. During the flow process, the oil droplets in the mixed liquid float and converge in each layer, which not only increases the length of the flow path, enables the mixed liquid to stay in the tank body for a long time, and allows sufficient time for oil-water separation, but also shortens the vertical distance for the oil droplets to float and gather. Even small oil droplets have sufficient time to float to the partition, relatively shortening the time required for the oil droplets to float; this design has the characteristics of a compact overall structure, a short required floating oil time, and thorough oil-water separation; at the same time, this design allows the flow direction of adjacent layers to be opposite, permits an increase in the flow rate to improve the flow rate of each layer, and ensures both production efficiency and the oil-water separation effect.

[0007] Furthermore, an oil collecting groove is formed on the lower surface of the partition, and the lower end of the oil passing hole opens into the oil collecting groove. This design provides a larger accommodation space for oil droplets on the bottom surface of the partition, facilitating the centralized convergence of the floating oil droplets and their smooth transition to the upper layer through the flow holes.

[0008] Preferably, a guiding inclined surface is provided in the oil collecting groove, and the oil passing hole is arranged at the end of the guiding inclined surface. This design can guide the oil layer converging at the bottom of the partition along the guiding inclined surface to the oil passing hole, enabling faster oil drainage from each layer.

[0009] Further, a downward flange is provided on the lower surface of the edge of the partition, and the flange and the partition form an oil collecting space. This design, through the setting of the flange, on the one hand, prevents the turning liquid flow at the edge of the partition from disturbing the oil layer and causing some oil droplets to re-mix into the liquid flow, affecting the separation effect; on the other hand, it is conducive to forming a staying space for the floating and converging oil droplets, and preventing oil droplets from floating from the edge of the partition, resulting in some oil droplets always staying in the liquid and being unable to float (the opposite direction of oil droplet floating and liquid flow easily causes the oil droplets to relatively hover in the liquid).

[0010] Furthermore, the oil passing hole is communicated with an oil passing pipe, and the upper end opening of the oil passing pipe is close to the bottom surface of the upper partition. This design can directly guide the oil droplets converging in the lower layer to the top of the upper layer and directly mix them with the oil droplets collected in the upper layer, avoiding re-entering the upper layer mixed liquid during the floating process. Affected by the reverse flow of the liquid flow in adjacent layers, some fine oil droplets are prone to hover in the middle section of each layer, reducing the oil-water separation effect.

[0011] Furthermore, the oil passing hole is communicated with an oil passing pipe, the oil passing pipe penetrates through each layer, and the upper end opening of the oil passing pipe is close to the top of the tank body. This design can directly guide the oil droplets converging in each layer to the top of the tank body and directly discharge them through the oil discharge port, with a shorter discharge path, further avoiding the re-contact of the collected oil droplets with the mixed liquid; at the same time, it can provide support for each layer to prevent the partition from deforming.

[0012] Preferably, a plurality of through holes are formed in the tubing string near the bottom surface of each partition plate. This design enables the tubing string to collect the converging oil beads in different layers simultaneously, effectively increasing the number of paths for the oil beads to float upward, shortening the residence time of the oil beads in each layer, and further increasing the flow-through area of the mixed liquid to improve the flow-through efficiency.

[0013] Furthermore, the liquid inlet is provided at the lower part or the bottom of the tank body. A first baffle is provided in the tank body near the liquid inlet. The lower end of the first baffle is connected to the bottom of the tank body, and the upper end is connected to the topmost partition plate. This design can create a buffer space after the mixed liquid enters the tank body, facilitating the control of the flow rate of the topmost layer. At the same time, the mixed liquid can form a first large-depth floating oil layer in the buffer space to achieve preliminary oil-water separation.

[0014] Furthermore, the drain outlet is provided at the lower part or the bottom of the tank body. An overflow plate is provided in the tank body near the drain outlet. A second baffle is provided on the side of the overflow plate away from the tank body wall. The lower end of the second baffle is connected to the bottommost partition plate, and the upper end is connected to the top of the tank body. This design can cause the liquid after layered separation to form a slow flow again before being discharged, enabling some fine oil beads remaining in the liquid to be separated again in this slow flow section, making the oil-water separation more thorough.

[0015] Advantageous Effects

[0016] One of the above technical solutions has the following advantages or beneficial effects:

[0017] 1. By arranging multiple layers of partition plates with oil-passing holes in parallel in the tank body, the internal space of the tank body is divided into multiple layers with relatively small floating heights. During the flow of the mixed liquid, the oil beads float and converge in each layer. This not only increases the length of the flow-through path, allowing the mixed liquid to stay in the tank body for a long time and giving sufficient time for oil-water separation, but also shortens the vertical distance for the oil beads to float and gather. Even small oil beads have sufficient time to float to the partition plate, relatively shortening the time required for the oil beads to float. The floating oil tank of the present invention realizes the segmented floating and layered oil collection of the oil beads in the mixed liquid, and has the characteristics of compact structure, small floor area, short required floating oil time, and thorough oil-water separation.

[0018] 2. By providing structures such as oil collection grooves and tubing strings on the partition plates, the oil beads converging in each layer can be quickly guided to the top of the tank body, effectively shortening the relative floating time of the oil beads and avoiding the secondary mixing of the oil beads with the mixed liquid, effectively improving the efficiency and effect of oil-water separation. Description of the Drawings

[0019] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0020] Figure 1 Structural schematic diagram of the first embodiment of the present utility model;

[0021] Figure 2 Top view structural schematic diagram of the first embodiment of the present utility model;

[0022] Figure 3 For the present utility model Figure 1 Enlarged schematic diagram of part A in;

[0023] Figure 4 Structural schematic diagram of the second embodiment of the present utility model;

[0024] Figure 5 Structural schematic diagram of the third embodiment of the present utility model;

[0025] Figure 6 Structural schematic diagram of the fourth embodiment of the present utility model;

[0026] Figure 7 For the present utility model Figure 6 Enlarged schematic diagram of part B in;

[0027] In the figure: tank body 1; liquid inlet 2; drain outlet 3; oil drain outlet 4; partition 5; oil sump 5a; diversion inclined plane 5a1; oil passing hole 5b; oil passing pipe 5c; through hole 5c1; flange 5d; layering 6; first baffle 7; second baffle 8; overflow plate 9. Specific embodiments

[0028] The present utility model will be further described in detail below in conjunction with embodiments, but the embodiments of the present utility model are not limited thereto.

[0029] Embodiment 1

[0030] This embodiment is a preferred solution of the present utility model. As Figures 1 to 3 shown, this embodiment provides an oil skimming tank, the structure of which includes a tank body 1, a liquid inlet 2, a drain outlet 3 and an oil drain outlet 4, as Figure 1 , Figure 2As shown, the liquid inlet 2 and the drain outlet 3 are respectively arranged at the upper and lower parts of the tank body 1, and the oil drain port 4 is arranged at the top of the tank body 1. A plurality of layers of partition plates 5 are arranged in parallel in the tank body 1 along the liquid flow direction, and the partition plates 5 are positioned by providing protrusions or supporting ribs (not shown in the drawings) on the inner wall of the tank body 1. The head and tail ends of the partition plates 5 are arranged in a staggered manner, that is, from top to bottom, the left end of the odd-numbered partition plates 5 is attached to the inner wall of the tank body 1, and the right end of the even-numbered partition plates 5 is attached to the inner wall of the tank body 1. The partition plates 5 divide the tank body 1 into multiple layers 6, and the number of the layers 6 and the partition plates 5 is determined according to the required height of the layers 6. The required height of the layers 6 is determined according to the floating height of the oil beads within the time when the liquid passes through the layers 6 under a preset flow rate (determined according to the required production efficiency). The layers 6 are sequentially connected at the right ends of the odd-numbered partition plates 5 and the left sides of the even-numbered partition plates 5 to form a curved flow channel. The liquid inlet 2 communicates with the topmost layer 6, and the drain outlet 3 communicates with the bottommost layer 6. The liquid in the flow channel flows in opposite directions in adjacent layers 6 and in the same direction in spaced layers 6, that is, the liquid flows in opposite directions in the odd-numbered layers 6 and the even-numbered layers 6, and in the same direction between the odd-numbered layers 6 or the even-numbered layers 6. An oil passing hole 5b is provided through the partition plate 5, and the oil passing hole 5b communicates upward with the upper layer 6; an oil collecting groove 5a is further opened on the lower surface (i.e., the bottom surface) of the partition plate 5. Preferably, as Figure 3 shown, a guiding inclined surface 5a1 is provided in the oil collecting groove 5a, and the oil passing hole 5b is arranged at the end of the guiding inclined surface 5a1, so that the floating oil layer converging at the bottom of the partition plate 5 can be guided to the oil passing hole 5b along the guiding inclined surface 5a1, promoting the rapid discharge of the floating oil layer in each layer 6 and preventing excessive accumulation on the bottom surface of the partition plate 5 and re-mixing into the liquid flow.

[0031] Embodiment 2

[0032] As Figure 4 shown, this embodiment provides an oil floating tank, which is different from Embodiment 1 in that:

[0033] A downward flange 5d is provided on the lower surface of the edge of the partition plate 5. The flange 5d and the partition plate 5 form an oil collecting space, which prevents the liquid flow from disturbing the floating oil layer when turning at the edge of the partition plate 5, causing some oil beads to re-mix into the liquid flow and affecting the separation effect. On the other hand, it is beneficial to form a staying space after the oil beads float and converge, and prevent the oil beads from floating from the edge of the partition plate 5, resulting in some oil beads always staying in the liquid and being unable to float (the oil beads floating in the opposite direction to the liquid flow easily causes the oil beads to relatively hover in the liquid).

[0034] The liquid inlet 2 is arranged at the lower part or the bottom of the tank body 1, and the drain outlet 3 is arranged at the lower part or the bottom of the other side of the tank body 1; a first baffle 7 is arranged near the liquid inlet 2 in the tank body 1, the lower end of the first baffle 7 is connected to the bottom of the tank body 1, and the upper end is connected to the uppermost partition plate 5; an overflow plate 9 is arranged near the drain outlet 3 in the tank body 1, a second baffle 8 is arranged on the side of the overflow plate 9 away from the wall of the tank body 1, the lower end of the second baffle 8 is connected to the lowermost partition plate 5, and the upper end is connected to the top of the tank body 1; large-depth slow-flow spaces are respectively formed at the liquid inlet 2 and the drain outlet 3 of the tank body 1, so that after the mixed liquid enters the tank body 1, preliminary oil-water separation is carried out, and part of the fine oil droplets staying in the liquid are separated again before being discharged, making the oil-water separation more thorough.

[0035] For other components not described in this embodiment and the relative positions and connection relationships between the components, they are the same as those in Embodiment 1.

[0036] Embodiment 3

[0037] As Figure 5 shown, the floating oil tank provided in this embodiment is different from Embodiment 1 or 2 in that:

[0038] An oil pipe 5c is connected to the empty end of the upper layer 6 at the oil passing hole 5b, and this connection method can be a detachable connection or a fixed connection. The upper end opening of the oil pipe 5c is close to the bottom surface of the upper partition plate 5.

[0039] The advantage of this embodiment is that this design can directly guide the oil droplets converged in the lower layer 6 to the top of the upper layer 6 and directly mix with the oil droplets collected in the upper layer 6, avoiding re-entering the mixed liquid in the upper layer 6 during the floating process. Affected by the reverse flow of the liquid flow in the adjacent layer 6, some fine oil droplets are likely to hover in the middle section of each layer 6, reducing the oil-water separation effect.

[0040] Embodiment 4

[0041] As Figure 6 、 7 shown, the floating oil tank provided in this embodiment is different from Embodiment 1 or 2 in that:

[0042] An oil pipe 5c is connected to the oil passing hole 5b, the oil pipe 5c penetrates through each layer 6, and the upper end opening of the oil pipe 5c is close to the top of the tank body 1. Preferably, as Figure 7 shown, a plurality of through holes 5c1 are opened at positions of the oil pipe 5c close to the bottom surface of each partition plate 5, and the through holes 5c1 communicate with the floating oil layer at the top of each layer 6.

[0043] The advantages of this embodiment are as follows: This design enables the oil beads converged by each layer 6 to be directly guided to the top of the tank body 1 and discharged directly through the oil discharge port 4, with a shorter discharge path; the through holes 5c1 on the over-pipe 5c near the bottom surface of the partition 5 can collect the floating oil layers of different layers 6 at the same time, effectively increasing the number of paths for the oil beads to float upward, shortening the residence time of the floating oil layers of each layer 6, and further preventing the oil beads after floating and aggregating from contacting the mixed liquid again, which affects the effect of layer 6; at the same time, the over-pipe 5c can provide support for each layer 6, avoiding deformation of the partition 5 or reducing the number of support structures of the partition 5.

[0044] In the description of the present utility model, the "water" in the "oil-water separation" and "oil-water mixed liquid" mentioned is not limited to pure aqueous solution, but also includes other inorganic solution forms mixed with oil beads.

[0045] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the present utility model.

Claims

1. An oil floating tank, comprising a tank body (1), a liquid inlet (2), a water outlet (3) and an oil outlet (4), characterized in that: Multiple layers of partitions (5) are arranged in parallel along the water flow direction in the tank body (1). The partitions (5) are arranged at staggered ends and divide the tank body (1) into multiple layers (6). The layers (6) are connected in sequence to form a flow channel. The flow directions of liquid in the flow channel are opposite in adjacent layers (6) and the flow directions in the interval layers (6) are the same. The partitions (5) are provided with oil holes (5b) extending therethrough. The oil holes (5b) are connected upward to the upper layers (6).

2. An oil floating tank according to claim 1, characterized in that: An oil collecting groove (5a) is provided on the lower surface of the partition plate (5), and the lower end of the oil passage hole (5b) opens into the oil collecting groove (5a).

3. An oil floating tank according to claim 2, characterized in that: The oil collecting groove (5a) is provided with a flow guiding inclined surface (5a1), and the oil passing hole (5b) is provided at the end of the flow guiding inclined surface (5a1).

4. An oil floating tank according to any one of claims 1 to 3, characterized in that: A downward flange (5d) is provided on the lower surface of the edge of the partition (5), and the flange (5d) and the partition (5) form an oil collecting space.

5. The oil floating tank according to claim 1, characterized in that: The oil passage hole (5b) is connected to an oil passage pipe (5c), and the upper end opening of the oil passage pipe (5c) is close to the bottom surface of the upper partition plate (5).

6. The oil floating tank according to claim 1, characterized in that: The oil-through hole (5b) is connected to an oil-through pipe (5c), and the oil-through pipe (5c) passes through each of the layers (6), and the upper end opening of the oil-through pipe (5c) is close to the top of the tank body (1).

7. An oil floating tank according to claim 6, characterized in that: The oil passage pipe (5c) is provided with a plurality of through holes (5c1) near the bottom surface of each of the partitions (5).

8. The oil floating tank according to claim 1, characterized in that: The liquid inlet (2) is arranged at the lower part or bottom of the tank body (1), and a first baffle (7) is arranged in the tank body (1) near the liquid inlet (2). The lower end of the first baffle (7) is connected to the bottom of the tank body (1), and the upper end is connected to the uppermost partition (5).

9. An oil floating tank according to claim 1, characterized in that: The drain outlet (3) is arranged at the lower part or the bottom of the trough body (1); an overflow plate (9) is arranged in the trough body (1) near the drain outlet (3); a second baffle (8) is arranged on the side of the overflow plate (9) away from the wall of the trough body (1); the lower end of the second baffle (8) is connected to the bottom partition plate (5), and the upper end is connected to the top of the trough body (1).

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