Beer flotation tank

Abstract

An oil flotation tank comprising a tank body (1), a liquid inlet (2), a water outlet (3) and an oil outlet (4), characterized in that several partition plates (5) are provided parallel to each other in the direction of flow of the liquid inside the tank body (1), wherein the partition plates (5) are arranged offset at their ends and divide the tank body (1) into several layers (9), wherein the layers (9) are connected one after the other and form a flow channel, wherein the liquid flows in opposite directions in adjacent layers (9) and in the same direction in non-adjacent layers (9), and wherein the partition plates (5) are each provided with an oil passage hole (6) which is connected to the uppermost layer (9).

Description

Technical field

[0001] The invention relates to the technical field of oil flotation devices, in particular an oil flotation tank. State of the art

[0002] In oil-water separation technology, oil flotation is a crucial step for effective separation. The separation effect is influenced by various factors, such as the size of the oil droplets, the oil flotation time, the droplet rise height, the oil-water mixture flow rate, and the pipeline length. Generally, the separation effect is directly proportional to the total oil flotation time and the pipeline length, and inversely proportional to the droplet rise height and the oil-water mixture flow rate. Furthermore, the total oil flotation time, the flow rate, and the pipeline length are mutually limiting factors. That is, a higher flow rate and a shorter pipeline result in a shorter oil flotation time and less thorough separation. Conversely, a lower flow rate and a longer pipeline result in a longer oil flotation time and better separation.In practice, a specific flow rate is required for efficient production in the oil flotation process. Given a specific flow rate, the existing oil flotation process can be configured as follows: 1. Using a deep oil flotation tank to reduce the flow rate of the oil-water mixture in the tank and increase its residence time, thereby increasing the oil flotation time. However, this method typically requires a large tank volume to ensure the flow rate. The greater depth also results in a greater rise height for the oil droplets, which somewhat weakens the oil-water separation effect. 2. Using a long, piped oil flotation tank to lengthen the flow path of the oil-water mixture and give the oil droplets sufficient time to rise vertically. The vertical rise distance of the oil droplets and the flow rate can be controlled via the pipe diameter.However, this method usually requires a lot of space due to the required pipeline length, and an excessively long pipeline is disadvantageous for oil extraction. Object of the invention

[0003] The object of the invention is to provide an oil flotation tank that solves the problem that existing oil flotation tanks, while improving oil-water separation by extending the overall oil flotation time, cannot simultaneously take into account production efficiency, space requirements and the oil-water separation effect.

[0004] This task is achieved through the following technical solution: The invention provides an oil flotation tank comprising a tank body, a liquid inlet, a water outlet, and an oil outlet, characterized in that several partition plates are provided parallel to each other in the flow direction of the mixed liquid inside the tank body, wherein the partition plates are arranged offset at their ends and divide the tank body into several layers, wherein the layers are connected one after the other and form a flow channel, wherein the mixed liquid flows in opposite directions in adjacent layers and in the same direction in layers that are not directly adjacent, and wherein each partition plate is provided with an oil passage hole that is connected to the layer above.This allows for a staged ascent and multi-layered oil collection, which not only ensures a compact structure but also relatively lengthens the flow path, shortens the required oil flotation time, and achieves a more thorough oil-water separation.

[0005] Furthermore, the separating plates on the lower surface each form an oil collection recess, with the lower end of the oil passage hole being connected to the oil collection recess to provide a larger space for the absorption of oil droplets on the underside of the separating plate, so that the rising oil droplets can be concentrated and smoothly transferred through the flow hole into the layer above.

[0006] Preferably, an inclined guide surface is provided in the oil collection recess, with the oil passage hole located at the end of the inclined guide surface. This allows the oil layer accumulating on the underside of the separating plate to be guided along the inclined guide surface to the oil passage hole, enabling faster oil drainage from each layer.

[0007] Furthermore, a flange extends downwards from the edge of the lower surface of the separating plate, with the flange and the separating plate forming an oil collection chamber. The flange design prevents the flowing mixture fluid from disturbing the oil layer at the edge of the separating plate, thus preventing oil droplets from re-entering the mixture and impairing the separation effect. It also creates a retention chamber after the oil droplets have risen and collected, preventing them from rising from the edge of the separating plate and thus remaining in the mixture.

[0008] Preferably, an oil tube is provided in the oil passage hole, communicating with the oil passage hole, the upper opening of which is located near the underside of the upper separating plate. This ensures that the oil droplets collected in the lower layer reach the surface of the upper layer directly and mix with the already collected oil droplets. This prevents the oil droplets from re-entering the mixture in the upper layer as they rise and, due to the opposing flow direction of the mixture in adjacent layers, from leaving fine oil droplets in the central region of each layer, which would impair oil-water separation.

[0009] Preferably, an oil pipe is provided in the oil passage hole, communicating with the oil passage hole. The oil pipe runs through each layer, with its upper opening located near the top of the tank body. This directs the oil droplets collected in each layer directly to the top of the tank body and discharges them via the oil outlet. This shortens the drainage path and also prevents the collected oil droplets from coming into contact with the mixture again. At the same time, the separating plates provide support for the individual layers and prevent their deformation.

[0010] Preferably, the oil tube is provided with several through-holes near the lower surface of each partition plate. This allows the oil tube to simultaneously collect oil droplets from different layers. This increases the distance the oil droplets have to travel and reduces the residence time of the floating oil layers in each layer. At the same time, the flow area of ​​the mixed fluid is increased, thereby improving flow efficiency.

[0011] Preferably, the liquid inlet is located in the lower region or at the bottom of the tank body, wherein a first barrier plate is provided in the tank body near the liquid inlet, and wherein the lower end of the first barrier plate is connected to the bottom of the tank body and its upper end is connected to the uppermost partition plate. This creates a buffer space for the mixed liquid after it enters the tank body, in order to regulate the flow rate of the uppermost layer. At the same time, the mixed liquid in the buffer space can generate a first oil flotation with a high rise height, thereby achieving preliminary oil-water separation.

[0012] Preferably, the water outlet is located in the lower region or at the bottom of the tank body, with an overflow plate being provided in the tank body near the water outlet. A second barrier plate is provided on the side of the overflow plate facing away from the tank body wall, the lower end of the second barrier plate being connected to the lowest separating plate and its upper end being connected to the top of the tank body. This allows the mixture, after being separated into layers, to be slowed down again before being discharged. During this slowed-down flow phase, some of the fine oil droplets remaining in the mixture can be separated again, thus making the oil-water separation more thorough.

[0013] Compared to the prior art, the invention has the following advantages: 1. By arranging several baffle plates with oil passages in parallel within the tank body, the interior is divided into multiple layers with low rise heights. As the mixed liquid flows through, the oil droplets rise and collect in each layer. This lengthens the flow path, allowing the mixed liquid to remain in the tank longer and providing sufficient time for oil-water separation. Simultaneously, the vertical path for the oil droplets to rise and collect is shortened, giving even small oil droplets enough time to reach the baffle plate. This reduces the time required for the oil droplets to rise, resulting in a staged ascent and multi-layered collection of the oil droplets from the mixed liquid. This leads to a compact overall structure, short oil flotation times, and thorough oil-water separation.Simultaneously, the flow direction of the mixed liquid in adjacent layers is reversed, resulting in a higher flow velocity and thus a higher flow rate, thereby further improving production efficiency and the effectiveness of oil-water separation. The oil flotation bank of this invention is characterized by a compact structure, small footprint, short oil flotation time, and thorough oil-water separation. 2. By attaching an oil collection recess and oil pipe to the separating plate, the oil droplets collected in each layer can be quickly directed to the top of the tank body. This effectively reduces the relative rising time of the oil droplets and prevents secondary mixing of the oil droplets with the liquid, thus significantly increasing the efficiency and effectiveness of the oil-water separation. Brief description of the drawings Fig. 1 a schematic representation of the structure of the first embodiment of the invention, Fig. 2 a top view of the first embodiment of the invention, Fig. 3 an enlarged representation of zone A in Fig. 1, Fig. 4 a schematic representation of the structure of the second embodiment of the invention, Fig. 5 a schematic representation of the structure of the third embodiment of the invention, Fig. 6 a schematic representation of the structure of the fourth embodiment of the invention, Fig. 7 an enlarged representation of zone B in Fig. 6. Ways to implement the invention

[0014] The present invention is described in more detail below with reference to embodiments, but its implementation is not limited to these. Design 1

[0015] This embodiment is a preferred solution of the present invention. As in the Fig. As shown in Figures 1-3, the oil flotation tank of the invention comprises a tank body 1, a liquid inlet 2, a water outlet 3 and an oil outlet 4 (see Figures 1-3). Fig. 1 and Fig. 2) The liquid inlet 2 and the water outlet 3 are located in the upper and lower regions of the tank body 1, respectively. The oil outlet 4 is located on the top of the tank body 1. Several baffle plates 5 are arranged parallel to each other in the direction of liquid flow inside the tank body 1. The baffle plates 5 are positioned on the inner wall of the tank body 1 by projections or support ribs (not shown in the figures). The baffle plates 5 are offset at their ends; that is, from top to bottom, the left ends of the odd-numbered baffle plates 5 and the right ends of the even-numbered baffle plates 5 rest against the inner wall of the tank body 1. The tank body 1 is divided into several layers 9 by the baffle plates 5. The number of layers 9 and baffle plates 5 is selected according to the required height of the layer 9.The height of layer 9 is determined by the rise height of the oil droplets within the flow time of the liquid through layer 9 at a predetermined flow rate (based on the desired production efficiency). The layers 9 are connected sequentially at the right ends of the odd-numbered separating plates 5 and at the left ends of the even-numbered separating plates 5, each forming a curved flow channel. The liquid inlet 2 is connected to the uppermost layer 9, and the water outlet 3 is connected to the lowermost layer 9. As indicated by the arrow in . Fig. As shown in Figure 1, the liquid flows in opposite directions in adjacent layers 9 and in the same direction in non-adjacent layers 9. That is, the flow direction of the liquid is opposite in the odd-numbered and even-numbered layers 9. The flow direction of the liquid is the same in the odd-numbered and even-numbered layers 9. The separating plates 5 are each provided with an oil passage 6, which is connected to the layer 9 above.

[0016] Preferably, as in the Fig. 2 and Fig. As shown in Figure 3, the separating plates 5 on the lower surface (i.e., on the bottom surface) each form an oil collection recess 501. Particularly preferably, as shown in Figure 3, the separating plates 5 on the lower surface (i.e., on the bottom surface) each form an oil collection recess 501. Fig. As shown in Figure 3, an inclined guide surface 502 is provided in the oil collection recess 501. The oil passage hole 6 is located at the end of the inclined guide surface 502, so that the floating oil layer collecting on the underside of the separating plate 5 can be guided along the inclined guide surface 502 to the oil passage hole 6, which promotes the rapid drainage of the floating oil layer of each layer 9 and prevents excessive accumulation on the underside of the separating plate 5 as well as remixing with the liquid flow. Design 2

[0017] As in Fig. As shown in Figure 4, this embodiment provides an oil flotation tank which, based on the structure of embodiment 1, further comprises: A flange 8 extends downwards from the edge of the lower surface of the separating plate 5. The flange 8 and the separating plate 5 form an oil collection space that prevents the liquid flow from disturbing the floating oil layer when deflected at the edge of the separating plate 5, thus preventing the oil droplets from re-entering the liquid flow and impairing the separation effect. Conversely, a residence space is formed after the oil droplets have risen and coalesced. This prevents the oil droplets from rising from the edge of the separating plate 5 and remaining permanently suspended in the liquid (the rising of the oil droplets is contrary to the flow direction of the liquid, causing the oil droplets to be easily suspended in the liquid).

[0018] The liquid inlet 2 is located in the lower area or at the bottom of the tank body 1, and the water outlet 3 is located in the lower area or at the bottom of the opposite side of the tank body 1. A first sealing plate 10 is provided in the tank body 1 near the liquid inlet 2. The lower end of the first sealing plate 10 is connected to the bottom of the tank body 1, and its upper end is connected to the uppermost partition plate 5. An overflow plate 12 is provided in the tank body 1 near the water outlet 3. A second sealing plate 11 is provided on the side of the overflow plate 12 facing away from the wall of the tank body 2. The lower end of the second sealing plate 11 is connected to the lowest partition 5, and its upper end is connected to the top of the tank body 1.The tank body 1 forms a deep flow slowing chamber in the area of ​​the liquid inlet 2 and the water outlet 3, so that the liquid undergoes preliminary oil-water separation upon entering the tank body 1. The droplets remaining in the liquid are separated again before discharge to ensure more thorough oil-water separation. embodiment 3

[0019] As in Fig. As shown in section 5, this embodiment provides an oil flotation tank which, based on the first or second embodiment, further comprises: An oil tube 7 is connected to the open end of the oil passage hole 6, which faces the upper layer 9. This connection can be detachable or fixed. The upper opening of the oil tube 7 is located near the underside of the upper separating plate 5.

[0020] The advantages of this embodiment are as follows: The oil droplets collected in the lower layer 9 are directed to the top of the upper layer 9 and mixed there with the oil droplets. This prevents them from re-entering the liquid of the upper layer 9 as they rise and, due to the opposing flow direction of the liquid in the adjacent layers 9, prevents fine oil droplets from remaining in the central region of each layer 9, which impairs the oil-water separation. Design 4

[0021] As in Fig. 6 and Fig. As shown in 7, this embodiment provides an oil flotation tank which, based on the first or second embodiment, further comprises: An oil pipe 7, connected to the oil passage hole 6 and extending through each layer 9, with its upper opening located near the top of the tank body 1. Preferably, the oil pipe 7 is, as shown in Fig. Figure 7 shows that each separating plate 5 is provided with several through-holes 701 near its lower surface. The through-holes 701 communicate with the floating oil layer on the top of each layer 9.

[0022] The advantages of this embodiment are as follows: This design directs the oil droplets collected from each layer 9 directly to the top of the tank body 1 and discharges them via the oil outlet 4, thus shortening the drainage path. The through-holes 701 of the oil tube 7, located near the lower surfaces of the partition plates 5, simultaneously collect the floating oil layers from different layers 9. This increases the distance the oil droplets have to ascend and reduces the residence time of the floating oil layer in each layer 9, preventing already risen and collected oil droplets from coming into contact with the liquid again and thus impairing the effectiveness of the layers 9. At the same time, the oil tube 7 supports the layers 9, preventing deformation of the partition plates 5 or reducing the need for support structures.

[0023] In the description of this invention, the term "water" in "oil-water separation" and "oil-water mixture" is not limited to pure aqueous solutions, but also includes other inorganic solution forms mixed with oil droplets.

[0024] The invention relates to an oil flotation bank comprising a tank body 1, a liquid inlet 2, a water outlet 3, and an oil outlet 4, wherein several partition plates 5 are provided in parallel inside the tank body 1, the partition plates 5 being offset at their ends and dividing the tank body 1 into several layers 9, the layers 9 being connected sequentially and forming a flow channel, and wherein each partition plate 5 is provided with an oil passage 6 connected to the uppermost layer 9. The invention divides the interior of the tank body into several layers by means of the partition plates with oil passages. This results in a staged ascent and multi-layered collection of the oil droplets in the mixed liquid, so that the oil flotation bank of this invention is characterized by a long flow path, a compact structure, a short oil flotation time, and thorough oil-water separation.

[0025] The above description merely presents the preferred embodiments of the present invention and does not limit its scope of protection. Therefore, minor modifications, equivalent changes, and variations of the above embodiments that are based on the core technical principles of the invention also fall within its scope of protection. Reference symbol list 1 tank body 2. Liquid inlet 3 Water outlet 4 Oil outlet 5 Dividing plate 501 Oil Collection Extraction 502 inclined guide surface 6 Oil passage holes 7 Oil pipe 701 Through hole 8 flange 9 shift 10 first locking plate 11 second locking plate 12 Overflow plate

Claims

[1] Oil flotation tank comprising a tank body (1), a liquid inlet (2), a water outlet (3) and an oil outlet (4), characterized by , that several partition plates (5) are provided parallel to each other in the direction of flow of the liquid inside the tank body (1), wherein the partition plates (5) are arranged offset at their ends and divide the tank body (1) into several layers (9), wherein the layers (9) are connected one after the other and form a flow channel, wherein the liquid flows in opposite directions in adjacent layers (9) and in the same direction in non-adjacent layers (9), and wherein each partition plate (5) is provided with an oil passage hole (6) which is connected to the uppermost layer (9). [2] Oil flotation tank according to claim 1, characterized by, that the separating plates (5) on the lower surface each form an oil collecting recess (501), wherein the lower end of the oil passage hole (6) is connected to the oil collecting recess (501). [3] Oil flotation tank according to claim 2, characterized by , that an inclined guide surface (502) is provided in the oil collection recess (501), wherein the oil passage hole (6) is located at the end of the inclined guide surface (502). [4] Oil flotation tank according to claim 1, characterized by , that a flange (8) extends downwards from the edge of the lower surface of the partition plate (5), the flange (8) and the partition plate (5) forming an oil collection chamber. [5] Oil flotation tank according to claim 2, characterized by , that a flange (8) extends downwards from the edge of the lower surface of the partition plate (5), the flange (8) and the partition plate (5) forming an oil collection chamber. [6] Oil flotation tank according to claim 3, characterized by, that a flange (8) extends downwards from the edge of the lower surface of the partition plate (5), the flange (8) and the partition plate (5) forming an oil collection chamber. [7] Oil flotation tank according to claim 1, characterized by , that an oil tube (7) is provided in the oil passage hole (6) which communicates with the oil passage hole, the upper opening of the oil tube (7) being located near the underside of the upper separating plate (5). [8] Oil flotation tank according to claim 1, characterized by , that an oil pipe (7) is provided in the oil passage hole (6) which communicates with the oil passage hole, wherein the oil pipe (7) passes through each layer (9) and its upper opening is located near the top of the tank body (1). [9] Oil flotation tank according to claim 8, characterized by , that the oil tube (7) is provided with several through holes (701) near the lower surface of each partition plate (5). [10] Oil flotation tank according to claim 1, characterized by , that the liquid inlet (2) is located in the lower area or at the bottom of the tank body (1), wherein a first sealing plate (10) is provided in the tank body (1) near the liquid inlet (2), and wherein the lower end of the first sealing plate (10) is connected to the bottom of the tank body (1) and its upper end is connected to the uppermost separating plate (5). [11] Oil flotation tank according to claim 1, characterized by , that the water outlet (3) is located in the lower area or at the bottom of the tank body (1), wherein an overflow plate (12) is provided in the tank body (1) near the water outlet (3), wherein a second sealing plate (11) is provided on the side of the overflow plate (12) facing away from the wall of the tank body (2), wherein the lower end of the second sealing plate (11) is connected to the lowest partition plate (5) and its upper end is connected to the top of the tank body (1).

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