Solid-liquid separator

Abstract

To provide a technique that enables more effectively separating various solids with different specific gravities and sizes than conventionally.SOLUTION: A solid-liquid separator comprises: first and second cyclone separators, each of which is a cylindrical member having an internal space shaped like an inverted truncated cone, an internal diameter of which decreases from top to bottom, with the top of the member being closed; a cylindrical inlet pipe, which penetrates a region of an upper end side in the first cyclone separator from a side thereof and extends into the internal space; a cylindrical return pipe, which penetrates the top of the first cyclone separator from above and extends to reach the internal space; and a cylindrical connecting pipe, which extends downward from a lower end of the first cyclone separator in a state of communicating with the internal space. Therein the second cyclone separator is positioned below the first cyclone separator, and the connecting pipe extends to penetrate a top of the second cyclone separator from above until reaching the internal space.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a solid-liquid separator that separates solid matter such as fine particles contained in a fluid. [Background technology]

[0002] Conventionally, solid-liquid separation devices have been known that remove solid matter such as fine particles from a fluid. Specifically, they are equipped with a cyclone separator having an internal space in the shape of an inverted truncated cone (a truncated cone turned upside down) whose internal diameter decreases from top to bottom (see, for example, Figure 2 of Patent Document 1).

[0003] In this solid-liquid separator, a fluid is introduced from the outside along the inner wall of the cyclone separator, falls while swirling within the internal space, and is then returned through a return pipe extending upward along the axis of the cyclone separator. During this process, solid matter such as fine particles contained in the fluid is pushed toward the inner wall by centrifugal force and falls, and is discharged from the bottom of the internal space, allowing the solid matter to be separated from the fluid. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6621349 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with conventional solid-liquid separators, if solids with small specific gravities or sizes are present, they are difficult to separate from the fluid, and the fluid ends up being refluxed with those solids still in it. In other words, conventional solid-liquid separators have the problem of making it difficult to effectively separate various solids with different specific gravities and sizes.

[0006] The present invention has been made to solve these problems, and its purpose is to provide a technology that enables more effective separation of various solids having different specific gravities and sizes than conventional techniques. [Means for solving the problem]

[0007] In a first aspect, in order to solve the above problems, there is provided a solid-liquid separation apparatus comprising: first and second cyclone separators, each of which is a cylindrical member having an internal space shaped like an inverted truncated cone, the internal diameter of which decreases from top to bottom, and the upper parts of the members being closed; a cylindrical inlet pipe penetrating an upper end region of the first cyclone separator from the side thereof and extending into the internal space; a cylindrical return pipe penetrating an upper part of the first cyclone separator from above and extending to reach the internal space; and a cylindrical connecting pipe extending downward from the lower end of the first cyclone separator while communicating with the internal space; the second cyclone separator is disposed below the first cyclone separator, and the connecting pipe extends through an upper part of the second cyclone separator from above and extends to reach the internal space.

[0008] In the solid-liquid separator of this aspect, the first and second cyclone separators are connected vertically via a connecting pipe.

[0009] As a result, the fluid introduced from the inlet pipe falls while swirling along the inner wall of the first cyclone separator, reaches the second cyclone separator, and then falls while swirling further along the inner wall of the second cyclone separator, before being returned through the connecting pipe and return pipe.

[0010] During this process, solid matter contained in the fluid falls while being pushed toward the inner walls of each cyclone separator by centrifugal force caused by the rotation, and is finally discharged from the bottom end of the second cyclone separator.

[0011] Here, the centrifugal force caused by the rotation is significantly lower in the second cyclone separator than in the first cyclone separator because the flow velocity of the fluid decreases as it travels from the first cyclone separator to the second cyclone separator through the connecting pipe.

[0012] The behavior of solids contained in a fluid is affected not only by the specific gravity and size of the solids themselves, but also by the magnitude of the centrifugal force that accompanies the swirling of the fluid. Therefore, a significant decrease in centrifugal force as the fluid falls significantly changes the behavior of the solids before and after this, which is effective in separating various solids.

[0013] Thus, the solid-liquid separator according to the above aspect can effectively separate various solids having different specific gravities and sizes.

[0014] The applicant of the present application came up with the above configuration as a result of ingenuity and ingenuity focused on the effect of centrifugal force when fluid swirls inside a cyclone separator, in order to be able to effectively separate various solids with different specific gravities and sizes. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B are a top view, a front view, and a right side view of a solid-liquid separation device according to an embodiment of the present disclosure; [Figure 2] FIG. 1 is a front view of a main part of a solid-liquid separation device according to an embodiment of the present disclosure. [Figure 3] 1 is a side view of a main part of a solid-liquid separation device according to an embodiment of the present disclosure. [Figure 4] FIG. 1 is a perspective view showing a water supply unit according to an embodiment of the present disclosure; DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. (1) Overall structure

[0017] As shown in FIGS. 1 and 2 , the solid-liquid separation apparatus 1 includes a first cyclone separator 10, a second cyclone separator 20 disposed below the first cyclone separator 10, a cylindrical inlet pipe 30 penetrating the first cyclone separator 10 from its side and extending into the internal space 11, a cylindrical return pipe 40 penetrating the first cyclone separator 10 from above and extending to the internal space 11, a cylindrical connecting pipe 50 extending downward from the lower end of the first cyclone separator 10 while communicating with the internal space 11, a pump 60 that introduces fluid into the internal space 11 of the first cyclone separator 10 via the inlet pipe 30, a discharge pipe 70 extending from the lower end of the second cyclone separator 20, and a recovery tank 80 provided at the lower end of the discharge pipe 70 so as to communicate with the internal space 21 of the second cyclone separator 20, and all of these are housed in a case 100.

[0018] In this embodiment, the case 100 is equipped with a pair of casters 110 on the left and right sides at the front lower part thereof, and a handle 120 extending in the left-right direction at the front upper part thereof, so that the solid-liquid separation device 1 can be easily moved.

[0019] The first and second cyclone separators 10 and 20 are cylindrical members having internal spaces 11 and 21 in the shape of an inverted truncated cone (a truncated cone turned upside down) whose inner diameter decreases from top to bottom, as shown in Fig. 2. The upper portions of the first and second cyclone separators 10 and 20 are closed by plate-like members 13 and 23, respectively.

[0020] In this embodiment, the first and second cyclone separators 10 and 20 have vertical lengths L1 and L2 in the internal spaces 11 and 21 that are at least twice the inner diameters D1 and D2 at the upper ends of the internal spaces 11 and 21 (2×D1≦L1, 2×D2≦L2).

[0021] In this embodiment, the first and second cyclone separators 10, 20 have the same shape and size, including their respective taper angles.

[0022] The inlet pipe 30 passes through the upper end region of the first cyclone separator 10 from the side thereof and extends until its tip reaches the internal space 11. This inlet pipe 30 introduces the fluid discharged from the pump 60 along the inner wall of the first cyclone 10.

[0023] The return pipe 40 passes through the upper portion of the first cyclone separator 10 from above and extends to reach the internal space 11. The return pipe 40 returns the fluid to a storage tank, which will be described later, through a return passage (not shown) connected to the outer end of the return pipe 40.

[0024] The connecting pipe 50 passes through the upper portion of the second cyclone separator 20 from above and extends until it reaches the internal space 21 .

[0025] Furthermore, the length L5 of the connecting pipe 50 extending vertically in the internal space 21 of the second cyclone separator 20 is shorter than the length L4 of the return pipe 40 extending vertically in the internal space 11 of the first cyclone separator 10 (L5 <L4)。

[0026] 3, the pump 60 has an intake port 61 connected to a suction passage 63, and an outlet port 65 connected to a discharge passage 67. The introduction pipe 30 is connected to this discharge passage 67.

[0027] The suction path 63 has an end opposite to the suction port 61 that is installed in a reservoir tank (not shown) that stores the target fluid, and achieves suction of the fluid from this reservoir tank. In this embodiment, a suction device 200 is connected to the end of the suction path 63 to efficiently suction the fluid.

[0028] 4, this suction device 200 is a cylindrical member having a truncated cone shape with the top closed, and a cylindrical body 210 that penetrates the top from top to bottom achieves connection with suction passage 63. In addition, this suction device 200 is provided with a plurality of circular holes 220 and rectangular (square in this embodiment) notches 230 that penetrate the side surface from inside to outside, alternately and at equal angular intervals around its axis (in this embodiment, there are four circular holes 220 and four notches 230, spaced at 45° intervals).

[0029] The suction device 200 is formed from a material (metal material in this embodiment) that has sufficient weight, and also functions as a weight to prevent the tip side of the suction path 63 from floating in the fluid stored in the storage tank.

[0030] The discharge pipe 70 is a cylindrical member that connects the lower end of the internal space 21 in the second cyclone separator 20 with the collection tank 80, and is provided with an on-off valve 71 that opens and closes the space between them. This on-off valve 71 is opened when solids are separated from a fluid using the solid-liquid separation device 1.

[0031] The collection tank 80 is a cylindrical member having an internal space 81 extending from above to below, and its upper portion is closed by a plate-like member 83. In the collection tank 80, the internal diameter D3 of the internal space 81 is larger than the internal diameter D2 of the upper end of the internal space 21 in the second cyclone separator 20 (D2 <D3)。

[0032] The recovery tank 80 has an internal space 81 that communicates with the outside at its lower end, and an on-off valve 87 that opens and closes the internal space 81 and the outside is provided on the lower end side. The on-off valve 87 is closed when solids are separated from a fluid using the solid-liquid separation device 1. In this embodiment, a recovery box 89 is disposed below the on-off valve 87, and contains solids that are discharged from the on-off valve 87 when the on-off valve 87 is opened.

[0033] (2) Variations Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the invention.

[0034] For example, in the above embodiment, the first and second cyclone separators 10, 20 have the same shape and size. However, these cyclone separators may have different shapes and sizes.

[0035] In the above embodiment, the collection tank 80 is a component having a cylindrical internal space 81 extending from above to below. However, the specific shape of the internal space 81 of the collection tank 80 is not limited to a cylindrical shape as long as it can collect the solid matter discharged from the lower end of the second cyclone separator 20. For example, it is conceivable that the internal space 81 of the collection tank 80 has an inverted truncated cone shape, similar to each cyclone separator.

[0036] (3) Effects In the solid-liquid separator 1 of the above embodiment, the first and second cyclone separators 10 and 20 are connected vertically via a connecting pipe 50.

[0037] As a result, the fluid introduced from the inlet pipe 30 falls while swirling along the inner wall of the first cyclone separator 10, and reaches the second cyclone separator 20. After falling while swirling along the inner wall of the second cyclone separator 20, the fluid is returned through the connecting pipe 50 and the return pipe 40.

[0038] During this process, solid matter contained in the fluid falls while being pushed toward the inner wall of each cyclone separator by centrifugal force caused by the rotation, and is finally discharged from the lower end of second cyclone separator 20 (specifically, discharge pipe 70).

[0039] Here, the centrifugal force caused by the rotation is significantly lower in the second cyclone separator 20 than in the first cyclone separator 10. This is because the flow velocity of the fluid decreases as it travels from the first cyclone separator 10 to the second cyclone separator 20 through the connecting pipe 50.

[0040] The behavior of solids contained in a fluid is affected not only by the specific gravity and size of the solids themselves, but also by the magnitude of the centrifugal force that accompanies the swirling of the fluid.

[0041] Therefore, the significant decrease in centrifugal force as the fluid falls significantly changes the behavior of the solids before and after the fall, which is effective in separating various solids. Thus, the solid-liquid separator 1 of the above embodiment can effectively separate various solids with different specific gravities and sizes. [Explanation of symbols]

[0042] 1...solid-liquid separation device, 10...first cyclone separator, 11...internal space, 13...plate-shaped member, 20...second cyclone separator, 21...internal space, 23...plate-shaped member, 30...inlet pipe, 40...return pipe, 50...connecting pipe, 60...pump, 61...suction port, 63...suction path, 65...discharge port, 67...discharge path, 70...discharge pipe, 71...on / off valve, 80...recovery tank, 81...internal space, 83...plate-shaped member, 87...on / off valve, 89...recovery box, 100...case, 110...caster, 120...handle, 200...suction device, 210...cylindrical body, 220...circular hole, 230...notch.

Claims

1. a first cyclone separator and a second cyclone separator, each of which is a cylindrical member having an internal space in the shape of an inverted truncated cone whose inner diameter decreases from top to bottom, and whose upper portion is closed; a cylindrical introduction pipe that penetrates an upper end region of the first cyclone separator from a side thereof and extends into the internal space; a cylindrical return pipe extending from above through an upper portion of the first cyclone separator to reach the internal space; a cylindrical connecting pipe extending downward from a lower end of the first cyclone separator while communicating with an internal space, the second cyclone separator is disposed below the first cyclone separator, The connecting pipe extends from above through an upper portion of the second cyclone separator to reach the internal space. Solid-liquid separation equipment.

2. The first and second cyclone separators have a vertical length in the internal space that is at least twice the inner diameter at the upper end of the internal space. The solid-liquid separator according to claim 1.

3. The first and second cyclone separators have the same shape and size, the connecting pipe has a length extending vertically in the internal space of the second cyclone separator that is shorter than the return pipe extending vertically in the internal space of the first cyclone separator; The solid-liquid separator according to claim 1 or 2.

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