Sludge recovery device and sludge recovery method

Abstract

To reduce sludge in liquid.SOLUTION: A sludge recovery device comprises: a non-magnetic cylindrical part (110) which has an immersion part (112) that is immersed in liquid (E); a magnet (120) which is positioned inside the cylindrical part (110) and attracts sludge (G) to the outer surface of the cylindrical part (110) with magnetic force; a movement part (130) which moves the magnet (120) within the cylindrical part (110); and a separation part (140) which separates the interaction between the magnet (120) moved by the movement part (130) and the sludge (G) adhering to the outer surface of the cylindrical part (110).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a sludge recovery device and a sludge recovery method. [Background technology]

[0002] The submerged liquid cooling device described in Patent Document 1 includes a refrigerant circuit to which a compressor, a condenser, an expansion valve, and an evaporator are connected, and the evaporator is submerged in the liquid to cool the liquid. The evaporator includes a coil portion. The coil portion has an inner refrigerant pipe wound in a spiral shape along the vertical direction, and an outer refrigerant pipe surrounding the inner refrigerant pipe and wound in a spiral shape along the vertical direction. The inner refrigerant pipe and the outer refrigerant pipe are coated with a fluororesin paint to prevent sludge such as grinding chips contained in the machining fluid from adhering thereto. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-068606 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the sludge in the machining fluid that does not adhere to the inner and outer refrigerant pipes by the fluororesin paint remains in the machining fluid (liquid) without being collected.

[0005] An object of the present disclosure is to be able to reduce sludge in liquids. [Means for solving the problem]

[0006] The sludge recovery device of the first embodiment comprises a non-magnetic cylindrical portion (110), a magnet (120) provided within the cylindrical portion (110) and using magnetic force to cause sludge (G) to adhere to the outer surface of the cylindrical portion (110), a moving portion (130) for moving the magnet (120) within the cylindrical portion (110), the magnet (120) moved by the moving portion (130), and a separating portion (140) for separating the magnet (120) from the sludge (G) adhered to the outer surface of the cylindrical portion (110).

[0007] In the first embodiment, the separating part (140) is disposed outside the liquid (E), a part of the tubular part (110) is immersed in the liquid (E), and the sludge (G) in the liquid (E) is caused to adhere to the outer surface of the tubular part (110) by the magnetic force of the magnet (120). The magnet (120 is then moved by the moving part (130), so that the sludge (G) adhering to the outer surface of the tubular part (110) moves together with the magnet (120) by the magnetic force of the magnet (120). However, by moving the magnet (120) to the location where the separating part (140) is located, the link between the magnet (120) and the sludge (G) can be separated. As a result, the sludge (G) can be separated from the outer surface of the tubular part (110) and collected, so that the amount of sludge (G) in the liquid (E) can be reduced.

[0008] In a second aspect, in the first aspect, the moving part (130) includes a string-like member that is connected to the magnet (120) and extends to the outside of the tubular part (110) through an opening (111) formed in the tubular part (110).

[0009] In the second aspect, the magnet (120) inside the tubular portion (110) can be moved by grasping the portion of the moving portion (130) that is located outside the tubular portion (110) through the opening (111) of the tubular portion (110) and pulling the moving portion (130).

[0010] In a third aspect, in the first or second aspect, the detachment portion (140) has a shape that protrudes outward from the outer surface of the tubular portion (110).

[0011] In the third embodiment, the sludge (G) adhering to the outer surface of the tubular portion (110) can be caught and collected by the separation portion (140).

[0012] In a fourth aspect, in any one of the first to third aspects, the magnet (120) is moved by the moving part (130) so that the magnet (120) passes through the separating part (140) in the extension direction (X) of the tubular portion (110), thereby separating the magnet (120) moved by the moving part (130) from the sludge (G) adhering to the outer surface of the tubular portion (110).

[0013] In the fourth aspect, the magnetic force acting on the sludge (G) is suppressed, so that the sludge (G) adhering to the outer surface of the tubular portion (110) can be detached from the outer surface of the tubular portion (110) by the magnetic force and collected.

[0014] A fifth aspect is any one of the first to fourth aspects, wherein the magnet (120) has a spherical shape.

[0015] In the fifth aspect, the magnet (120) can be easily moved within the cylindrical portion (110).

[0016] In a sixth aspect, in the fifth aspect, within the tubular portion (110), a plurality of the magnets (120) are arranged along the extension direction (X) of the tubular portion (110), and the moving portion (130) is connected to at least one of the plurality of magnets (120) so that the plurality of magnets (120) move as a unit.

[0017] In the sixth aspect, the plurality of magnets (120) can be moved integrally within the tube portion (110) by the moving portion (130).

[0018] A seventh aspect is any one of the first to sixth aspects, wherein the tubular portion (110) includes a first horizontal portion (113a) extending along a horizontal direction, and the separation portion (140) is provided on an outer surface of the first horizontal portion (113a).

[0019] In the seventh aspect, the sludge (G) that has fallen from the separation portion (140) can be easily collected.

[0020] An eighth aspect is any one of the first to seventh aspects, wherein the tubular portion (110) includes a second horizontal portion (112a) extending along the horizontal direction, the end portion (110b) side is immersed in the liquid (E), and the second horizontal portion (112a) is located closer to the end portion (110b) of the tubular portion (110).

[0021] In the eighth aspect, the second horizontal portion (112a) is placed in the liquid (E) and a magnet (120) is disposed within the second horizontal portion (112a), so that sludge (G) can be caused to adhere to the outer surface of the second horizontal portion (112a) by the magnetic force of the magnet (120).

[0022] A ninth aspect is any one of the first to eighth aspects, further comprising an outer tube portion (150) covering a portion of the tube portion (110), the tube portion (110) being inserted through a housing (30) disposed outside the liquid (E), and the outer tube portion (150) covering a portion of the tube portion (110) that is provided inside the housing (30).

[0023] In the ninth aspect, it is possible to prevent sludge (G) from remaining inside the housing (30).

[0024] A tenth aspect is the ninth aspect, wherein the outer tube portion (150) includes an outer tube portion (154) protruding outside the housing (30), and the outer tube portion (154) is provided with a flange portion (160) protruding outward from the outer surface of the outer tube portion (154).

[0025] In the tenth aspect, the sludge (G) that does not enter the outer tubular portion (150) (the space between the tubular portion (110) and the outer tubular portion (150)) is blocked by the flange portion (160), thereby preventing the sludge (G) from moving toward the housing (30) and adhering to the housing (30).

[0026] The sludge recovery method of an eleventh aspect includes the steps of: immersing an immersion portion (112) which is a part of a non-magnetic cylindrical portion (110) in a liquid (E); arranging another part of the cylindrical portion (110) which is an outer liquid portion (113) outside the liquid (E); arranging a magnet (120) inside the immersion portion (112); and adhering sludge (G) in the liquid (E) to an outer surface of the immersion portion (112) by the magnetic force of the magnet (120); The method includes a step of moving the magnet (120) from a location where the immersion portion (112) is located to a location where the outer liquid portion (113) is located, thereby moving the sludge (G) adhering to the outer surface of the immersion portion (112) to the outer surface of the outer liquid portion (113); a step of disconnecting the moving magnet (120) from the sludge (G) adhering to the outer surface of the cylindrical portion (110) outside the liquid (E); and a step of recovering the sludge (G) outside the liquid (E).

[0027] In the eleventh embodiment, the sludge (G) in the liquid (E) can be reduced. [Brief description of the drawings]

[0028] [Figure 1] Fig. 1(a) is a cross-sectional view of the sludge recovery device, and Fig. 1(b) is a cut-away end view of the separation portion seen from above. [Diagram 2] FIG. 2 is a cross-sectional view of the sludge recovery device. [Diagram 3] FIG. 3 is a cross-sectional view of the sludge recovery device. [Figure 4] FIG. 4 is a perspective view showing the configuration of the cooling device. [Diagram 5] FIG. 5 is a schematic diagram showing the configuration of the refrigerant circuit. [Figure 6] FIG. 6 is a perspective view showing a configuration of a hydraulic device. [Figure 7] FIG. 7 is a cross-sectional view of a first modified example of the sludge collection device. [Figure 8] FIG. 8 is a cross-sectional view of a first modified example of the sludge collection device. [Figure 9]FIG. 9 is a cross-sectional view of a second modified example of the sludge recovery device. [Figure 10] FIG. 10 is a cross-sectional view of a third modified example of the sludge recovery device. [Figure 11] Fig. 11(a) is a cut end view of the lower surface of the housing as viewed from below, and Fig. 11(b) is a cut end view of the side surface of the housing as viewed from the horizontal direction. [Figure 12] Fig. 12(a) is a cross-sectional end view of the cut-off portion as viewed from the horizontal direction, and Fig. 12(b) is a cross-sectional end view of the flange portion as viewed from the lower horizontal direction. [Figure 13] FIG. 13 is a cross-sectional view of a third modified example of the sludge recovery device. [Figure 14] FIG. 14 is a cross-sectional view of a third modified example of the sludge recovery device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible within the scope of the technical idea of ​​the present disclosure. Since each drawing is intended to conceptually explain the present disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding. In each embodiment, modified example, and drawing, the same or equivalent parts are given the same reference symbols, and detailed descriptions and descriptions of the accompanying effects will not be repeated.

[0030] -Sludge recovery equipment- A sludge recovery apparatus (100) according to an embodiment of the sludge recovery apparatus of the present invention will now be described.

[0031] The sludge recovery device (100) is a device for reducing sludge in a liquid (E). The liquid (E) is stored in a tank (T). The symbol (E1) indicates the liquid level of the liquid (E) stored in the tank (T). The sludge (G) is, for example, metal powder, grinding chips (cuttings), or abrasives. In this embodiment, the sludge (G) is a substance having magnetic properties. The liquid (E) is a liquid (E) to which the sludge (G) is supplied as an impurity. The liquid (E) is, for example, a machining fluid such as a grinding fluid and a spindle lubricant for a machine tool.

[0032] As shown in FIGS. 1(a) and 1(b), the sludge collection device (100) includes a cylindrical portion (110), a magnet (120), a moving portion (130), and a separating portion (140).

[0033] The cylindrical portion (110) is a hollow member. The cylindrical portion (110) is made of a non-magnetic material. In this embodiment, the cross section of the cylindrical portion (110) perpendicular to the direction (X) in which the cylindrical portion (110) extends is formed in an annular shape. An opening (111) that communicates with the inside and outside of the cylindrical portion (110) is formed in one end (110a) of the cylindrical portion (110). The other end (110b) of the cylindrical portion (110) may be open so as to communicate with the inside and outside of the cylindrical portion (110) or may be closed. The other end (110b) side of the cylindrical portion (110) is disposed in the liquid (E) in the tank (T), and the one end (110a) side of the cylindrical portion (110) is disposed outside the liquid (E). In this embodiment, the cylindrical portion (110) has a shape that extends along the up-down direction. The up-down direction refers to the vertical up-down direction.

[0034] Hereinafter, the direction (X) in which the tubular portion (110) extends may be referred to as the tubular direction (X). In the tubular direction (X), the direction toward one end portion (110a) may be referred to as one side (X1), and the direction toward the other end portion (110b) may be referred to as the other side (X2).

[0035] The tubular portion (110) includes an immersed portion (112) and an outside liquid portion (113). The immersed portion (112) is a portion of the tubular portion (110) closer to the other end (110b), and is immersed in the liquid (E) in the tank (T). The outside liquid portion (113) is a portion of the tubular portion (110) closer to the one end (110a), and is present outside the liquid (E) (in the atmosphere).

[0036] The magnet (120) is a permanent magnet. The magnet (120) has a spherical shape. A plurality of magnets (120) are provided inside the cylindrical portion (110) so as to be aligned along the cylindrical direction (X). The shape of the magnet (120) is not particularly limited. The number of magnets (120) provided inside the cylindrical portion (110) is not particularly limited, and may be multiple or single.

[0037] The moving part (130) is a member for moving the magnet (120) in the cylindrical part (110) along the cylindrical direction (X). The moving part (130) is a string-like member. The moving part (130) is formed, for example, from nylon. The material of the moving part (130) is not particularly limited. One end (131) of the moving part (130) is connected to the magnet (120) in the cylindrical part (110). The other end (132) of the moving part (130) extends to the outside of the cylindrical part (110) through the opening (111) of the cylindrical part (110). An operator or the like can grasp the other end (132) of the moving part (130) and pull the moving part (130).

[0038] The configuration for connecting the moving part (130) and the magnet (120) is not particularly limited. For example, a hole may be provided in the magnet (120), and the string-like moving part (130) may be inserted through the hole, and the string may be tied to the magnet (120). When multiple magnets (120) are provided inside the cylindrical part (110), the moving part (130) is connected to at least one of the multiple magnets (120) so that the multiple magnets (120) move together. In this case, for example, holes may be provided in all of the multiple magnets (120), and the string-like moving part (130) may be inserted through the hole, and the moving part (130) may be connected to the magnet (120) located furthest from the other direction side (X2) among the multiple magnets (120).

[0039] The detachment portion (140) is provided on the outer surface of the cylindrical portion (110) and has a shape that protrudes outward from the outer surface of the cylindrical portion (110). The detachment portion (140) is provided on the liquid outer portion (113) of the cylindrical portion (110). The detachment portion (140) is formed in an annular shape along the circumferential direction of the cylindrical portion (110), and is a plate-like member that protrudes radially from the outer surface of the cylindrical portion (110) in a direction perpendicular to the cylindrical direction (X).

[0040] - Sludge collection procedure - 1(a), when the immersed portion (112) of the cylindrical portion (110) is immersed in the liquid (E), the outside of the liquid (113) is placed in the atmosphere outside the liquid (E), and a magnet (120) is placed inside the immersed portion (112) of the cylindrical portion (110), sludge (G) in the liquid (E) adheres to the outer surface of the immersed portion (112) due to the magnetic force of the magnet (120). The sludge (G) adheres to the portion of the outer surface of the immersed portion (112) that is located around the magnet (120).

[0041] When the other end (132) of the moving part (130) is gripped and the moving part (130) is pulled, the magnet (120) in the tubular part (110) moves in one direction (X1) in the tubular direction (X), and accordingly, the sludge (G) adhering to the outer surface of the tubular part (110) due to the magnetic force of the magnet (120) also moves in the one direction (X1) in the tubular direction (X).

[0042] 2, when the moving part (130) is pulled further, the magnet (120) moves from the location where the immersed part (112) is located to the location where the outer liquid part (113) is located within the tubular part (110). As a result, the sludge (G) that has been adhering to the outer surface of the immersed part (112) by the magnetic force of the magnet (120) also moves to the outer surface of the outer liquid part (113) and remains attached to the outer surface of the outer liquid part (113).

[0043] 3, when the moving part (130) is pulled further, the sludge (G) that has been moving together with the tubular part (110) due to the magnetic force of the magnet (120) in the tubular direction (X) is stuck to the separation part (140) and stops, while the magnet (120) passes through the separation part (140). This causes the magnet (120) moved by the moving part (130) to be separated from the sludge (G) adhering to the outer surface of the tubular part (110). As a result, the magnet (120) is separated from the sludge (G), and the magnetic force of the magnet (120) acting on the sludge (G) is suppressed.

[0044] By suppressing the magnetic force of the magnet (120) acting on the sludge (G), the sludge (G) falls from the separation section (140) under its own weight and is collected in the container (Y). As a result, the sludge (G) in the liquid (E) can be collected, thereby reducing the amount of sludge (G) in the liquid (E).

[0045] -First example of use of sludge recovery equipment- The sludge recovery device (100) is used in a cooling device (1). The cooling device (1) will be described with reference to Figs. 4 and 5. As shown in Figs. 4 and 5, the cooling device (1) includes a housing (11), a compressor (12), a condenser (13), an expansion mechanism (14), an evaporator (15), a blower fan (16), and the like. The compressor (12), the condenser (13), the expansion mechanism (14), and the evaporator (15) are connected to a refrigerant circuit (10) in this order. The refrigerant circuit (10) is filled with a refrigerant. The refrigerant circuit (10) performs a vapor compression refrigeration cycle. The compressor (12), the condenser (13), and the expansion mechanism (14) are housed in the housing (11). The evaporator (15) includes a coil portion through which the refrigerant flows, and is disposed so as to be immersed in the liquid (E) in the tank (T). The liquid (E) in the tank (T) circulates between the machine tool (M) and the tank (T). The liquid (E) flowing out of the tank (T) is heated by the machine tool (M). The heated liquid (E) flows into the tank (T). The evaporator (15) cools the liquid (E) in the tank (T) by exchanging heat between the liquid (E) and a refrigerant. The condenser (13) exchanges heat between the refrigerant and air transported by the blower fan (16). The condenser (13) may be a water-cooled condenser that exchanges heat between water and the refrigerant.

[0046] The sludge recovery device (100) recovers sludge (G) from liquid (E) (working fluid) stored in a tank (T) of the cooling device (1).

[0047] -Second example of use of sludge recovery equipment- The sludge recovery device (100) is used in hydraulic equipment (2). The hydraulic equipment (2) will be described with reference to FIG. 6. As shown in FIG. 6, the hydraulic equipment (2) includes a hydraulic pump (21) that sends hydraulic oil stored in a tank (T) to the main equipment, a motor that drives the hydraulic pump (21), a housing (23) that covers components of the hydraulic equipment (2), and the like. In FIG. 6, the motor is located in a place covered by the housing (23). The hydraulic equipment (2) is used in equipment (main equipment) such as an injection molding machine, a press machine, a machine tool, etc., and operates the main equipment by sending hydraulic oil in a tank (T) to the main equipment by the hydraulic pump (21).

[0048] The sludge recovery device (100) recovers sludge (G) from liquid (E) (hydraulic oil) stored in a tank (T) of a hydraulic device (2).

[0049] -effect- As described above, the sludge recovery device (100) comprises a non-magnetic tubular portion (110), a magnet (120) provided within the tubular portion (110) and using magnetic force to adhere magnetic sludge (G) to the outer surface of the tubular portion (110), a moving portion (130) for moving the magnet (120) within the tubular portion (110), the magnet (120) moved by the moving portion (130), and a separating portion (140) for separating the magnet (120) from the sludge (G) adhered to the outer surface of the tubular portion (110). In the sludge recovery device (100), the magnet (120) is moved by the moving part (130), so that the sludge (G) in the liquid (E) that has adhered to the outer surface of the tubular part (110) is moved to the outside of the liquid (E) by the magnetic force of the magnet (120), and the separation part (140) separates the link between the magnet (120) and the sludge (G) to suppress the magnetic force acting on the sludge (G), so that the sludge (G) can be separated from the outer surface of the tubular part (110) and recovered. As a result, the sludge (G) in the liquid (E) can be reduced.

[0050] -First modified example of sludge recovery device- As shown in FIG. 7, the outer liquid portion (113) may include a first horizontal portion (113a). The first horizontal portion (113a) is a portion of the outer liquid portion (113) extending in the horizontal direction. A separation portion (140) is provided on an outer surface of the first horizontal portion (113a). The separation portion (140) is formed in an annular shape along the circumferential direction of the first horizontal portion (113a) and radially protrudes from the outer surface of the first horizontal portion (113a) in a direction perpendicular to the tubular direction (X). This makes it easy to ensure an installation space for a container (Y) for collecting sludge (G) below the first horizontal portion (113a) and along the first horizontal portion (113a). As a result, as shown in FIG. 8, when the moving part (130) is pulled to collect the sludge (G), the sludge (G) that has fallen from the detaching part (140) can be easily collected in the container (Y).

[0051] -Second modified example of sludge recovery device- 9, the immersed section (112) may include a second horizontal section (112a). The second horizontal section (112a) is a section of the immersed section (112) that extends along the horizontal direction. In this way, by arranging a plurality of magnets (120) in the second horizontal section (112a) along the horizontal direction, the magnetic force of the magnets (120) can be applied to an area having a horizontal width in the liquid (E), thereby effectively attracting the sludge (G) to the outer surface of the second horizontal section (112a).

[0052] -Third modified example of sludge recovery device- 10, the sludge collection device (100) includes a cylindrical portion (110), a magnet (120), a moving portion (130), a separating portion (140), an outer cylindrical portion (150), and a flange portion (160). It also includes an immersion portion (112), an outer liquid portion (113), and an insertion portion (114).

[0053] The tubular portion (110) is inserted through a housing (30) disposed outside the liquid (E). In this embodiment, the tubular portion (110) is inserted through a housing (30) of a device that operates on the liquid (E). Devices that operate on the liquid (E) include, for example, devices that purify (remove sludge) the liquid (E), devices that pump (pump) the liquid (E), devices that adjust the temperature of the liquid (E), devices that adjust the amount of the liquid (E), devices that adjust the components of the liquid (E), and the like. The housing (30) is, for example, the housing (11) of the cooling device (1) (see FIG. 4) or the housing (23) of the hydraulic device (2) (see FIG. 6).

[0054] 10, 11(a), and 11(b), holes (31a2, 31b1) that communicate between the inside and the outside of the housing (30) are formed in the housing (30). The tube portion (110) is inserted into the housing (30) through the holes (31a2, 31b1).

[0055] The tubular portion (110) includes an immersed portion (112), an outer liquid portion (113), and an insertion portion (114). The tubular portion (110) has a shape in which the insertion portion (114) is disposed within the housing (30), and the immersed portion (112) and the outer liquid portion (113) protrude outward from the housing (30).

[0056] The immersed portion (112) is a portion of the cylindrical portion (110) closer to the other end portion (110b), and is immersed in the liquid (E) in the tank (T). The immersed portion (112) is disposed below the housing (30). The immersed portion (112) is disposed, for example, inside the coil portion (15a).

[0057] The outside liquid portion (113) is a portion of the tubular portion (110) near the one end portion (110a) and is present outside the liquid (E) (in the atmosphere). The outside liquid portion (113) is disposed outside the housing (30) and protrudes from the housing (30).

[0058] The insertion portion (114) is a portion of the tubular portion (110) that is located between the immersed portion (112) and the outside liquid portion (113) and that is disposed within the housing (30). The insertion portion (114) has a shape that is bent or curved at a substantially right angle.

[0059] The outer liquid portion (113) includes a first horizontal portion (113a). The first horizontal portion (113a) is a portion of the outer liquid portion (113) that extends in the horizontal direction.

[0060] As shown in FIGS. 10 and 12(a), the separation portion (140) is provided on the outer surface of the first horizontal portion (113a).

[0061] As shown in FIGS. 10, 11(a), 11(b), and 12(b), the outer cylinder portion (150) is a cylindrical member having openings (151, 152) at both ends. The cylinder portion (110) is inserted into the outer cylinder portion (150) through the openings (151, 152). The outer cylinder portion (150) and the cylinder portion (110) form a double pipe. The opening (151) at one end of the outer cylinder portion (150) is located below the lower surface (31a) of the housing (30). The opening (152) at the other end of the outer cylinder portion (150) communicates with a hole (31b1) in the side surface (31b) of the housing (30).

[0062] Hereinafter, the space between the outer tubular portion (150) and the tubular portion (110) may be referred to as a passage (170).

[0063] The outer cylinder part (150) is inserted into the housing (30) through a hole (31a2) in the lower surface (31a) of the housing (30). The outer cylinder part (150) includes a first outer cylinder portion (153) and a second outer cylinder portion (154). The first outer cylinder portion (153) is located inside the housing (30) and covers the insertion portion (114) of the cylinder part (110). The second outer cylinder portion (154) is located outside the housing (30) and covers a portion of the cylinder part (110) that extends from the insertion portion (114) toward the immersion portion (112).

[0064] 10 and 12(b), the flange portion (160) is provided on the outer surface of the second outer cylinder portion (154) and has a shape that protrudes outward from the outer surface of the second outer cylinder portion (154). The flange portion (160) is formed in an annular shape along the circumferential direction of the second outer cylinder portion (154), and is a plate-like member that protrudes radially from the outer surface of the second outer cylinder portion (154) in a direction perpendicular to the cylindrical direction (X).

[0065] The procedure for recovering sludge (G) from liquid (E) using the sludge recovery device (100) will now be described.

[0066] As shown in Fig. 10, when the immersed portion (112) of the tubular portion (110) is immersed in the liquid (E), the outer portion (113) of the liquid is placed in the atmosphere outside the liquid (E), and a magnet (120) is placed inside the immersed portion (112) of the tubular portion (110), sludge (G) in the liquid (E) adheres to the outer surface of the immersed portion (112) due to the magnetic force of the magnet (120). The sludge (G) adheres to the portion of the outer surface of the immersed portion (112) that is located around the magnet (120). As a result, the sludge (G) is captured.

[0067] When the other end (132) of the moving part (130) is gripped and the moving part (130) is pulled, the magnet (120) in the tubular part (110) moves in one direction (X1) in the tubular direction (X), and accordingly, the sludge (G) adhering to the outer surface of the tubular part (110) due to the magnetic force of the magnet (120) also moves in the one direction (X1) in the tubular direction (X).

[0068] As shown in FIG. 13, the moving part (130) is further pulled, and the magnet moves to a place in the tubular part (110) where the tubular part (110) and the outer tubular part (150) form a double pipe. As a result, the sludge (G) that has been attached to the outer surface of the immersion part (112) by the magnetic force of the magnet (120) enters the passage (170) through the opening (151) of the outer tubular part (150) and moves in the passage (170). At this time, the sludge (G) that does not enter the passage (170) is blocked by the flange part (160), so that it is possible to prevent the sludge (G) from moving toward the housing (30) and attaching to the lower surface (31a) of the housing (30). In addition, the sludge (G) moves through the passage (170) covered by the outer tubular part (150) in the housing (30), so that it is possible to prevent the sludge (G) from leaking into the housing (30) and remaining in the housing (30).

[0069] The moving part (130) is further pulled, and the magnet (120) moves to a position within the tubular part (110) where the outer liquid part (113) is located. As a result, the sludge (G) that had been moving within the passage (170) also comes out of the passage (170) through the opening (152) of the outer tubular part (150) and adheres to the outer surface of the outer liquid part (113).

[0070] As shown in Fig. 14, when the moving part (130) is pulled further, the sludge (G) that has been moving together with the tubular part (110) due to the magnetic force of the magnet (120) in the tubular direction (X) is stuck to the separation part (140) and stops, while the magnet (120) passes through the separation part (140). This causes the magnet (120) moved by the moving part (130) to be separated from the sludge (G) adhering to the outer surface of the tubular part (110). As a result, the magnet (120) is separated from the sludge (G), and the magnetic force of the magnet (120) acting on the sludge (G) is suppressed.

[0071] By suppressing the magnetic force of the magnet (120) acting on the sludge (G), the sludge (G) falls from the separation section (140) under its own weight and is collected in the container (Y). As a result, the sludge (G) in the liquid (E) can be collected, and the amount of sludge (G) in the liquid (E) can be reduced.

[0072] Although the embodiments and modifications have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the claims. Furthermore, the above embodiments, modifications, and other embodiments may be appropriately combined or substituted as long as the functions of the subject of the present disclosure are not impaired.

[0073] The descriptions "first," "second," "third," etc. mentioned above are used to distinguish the words to which these descriptions are attached, and do not limit the number or order of the words. [Industrial Applicability]

[0074] INDUSTRIAL APPLICABILITY As described above, the present disclosure is useful for a sludge recovery apparatus and a sludge recovery method. [Explanation of symbols]

[0075] 100 Sludge recovery device 110 Cylinder part 112 Immersion section 113 Liquid External 120 Magnet 130 Mobile Unit 140 Separation section E liquid G Sludge

Claims

1. a non-magnetic cylindrical portion (110); a magnet (120) provided in the cylindrical portion (110) and configured to cause sludge (G) to adhere to an outer surface of the cylindrical portion (110) by magnetic force; a moving portion (130) for moving the magnet (120) inside the cylindrical portion (110); a separating section (140) that separates the magnet (120) moved by the moving section (130) from the sludge (G) adhering to the outer surface of the cylindrical section (110); A sludge recovery device comprising:

2. 2. The sludge recovery apparatus according to claim 1, wherein the moving portion (130) includes a string-like member connected to the magnet (120) and extending to the outside of the cylindrical portion (110) through an opening (111) formed in the cylindrical portion (110).

3. The sludge recovery apparatus according to claim 1 or 2, wherein the separation portion (140) has a shape that protrudes outward from an outer surface of the cylindrical portion (110).

4. 3. A sludge recovery device as described in claim 1 or claim 2, wherein the magnet (120) is moved by the moving part (130) so that the magnet (120) passes through the separating part (140) in the extension direction (X) of the cylindrical portion (110), thereby separating the link between the magnet (120) moved by the moving part (130) and the sludge (G) adhering to the outer surface of the cylindrical portion (110).

5. The sludge recovery apparatus of claim 1 or 2, wherein the magnet (120) has a spherical shape.

6. Within the cylindrical portion (110), the magnets (120) are aligned along a direction (X) in which the cylindrical portion (110) extends, The sludge recovery apparatus of claim 5 , wherein the moving part (130) is coupled to at least one magnet (120) of the plurality of magnets (120) such that the plurality of magnets (120) move together.

7. The cylindrical portion (110) includes a first horizontal portion (113a) extending horizontally, The sludge recovery apparatus according to claim 1 or 2, wherein the separation portion (140) is provided on an outer surface of the first horizontal portion (113a).

8. The cylindrical portion (110) includes a second horizontal portion (112a) extending along a horizontal direction, and an end portion (110b) side is immersed in the liquid (E), The sludge recovery apparatus according to claim 1 or 2, wherein the second horizontal portion (112a) is located closer to the end (110b) of the cylindrical portion (110).

9. an outer tubular portion (150) that covers a part of the tubular portion (110); The cylindrical portion (110) is inserted through a housing (30) that is disposed outside the liquid (E), 3. The sludge recovery apparatus according to claim 1, wherein the outer tubular portion (150) covers a portion of the tubular portion (110) that is provided inside the housing (30).

10. The outer tubular portion (150) includes an outer tubular portion (154) protruding to the outside of the housing (30), The sludge recovery apparatus of claim 9, wherein the outer tubular portion (154) is provided with a flange (160) that protrudes outwardly from an outer surface of the outer tubular portion (154).

11. a step of immersing a submerged portion (112) which is a part of a non-magnetic cylindrical portion (110) in a liquid (E), placing another part of the cylindrical portion (110) which is an outer liquid portion (113) outside the liquid (E), placing a magnet (120) inside the submerged portion (112), and adhering sludge (G) in the liquid (E) to an outer surface of the submerged portion (112) by a magnetic force of the magnet (120); a step of moving the magnet (120) from a position inside the tubular portion (110) where the immersed portion (112) is located to a position inside the tubular portion (110) where the outer liquid portion (113) is located, thereby moving sludge (G) adhering to an outer surface of the immersed portion (112) to an outer surface of the outer liquid portion (113); a step of disconnecting the moving magnet (120) from the sludge (G) adhering to the outer surface of the tubular portion (110) outside the liquid (E); recovering sludge (G) outside the liquid (E); A method for recovering sludge comprising the steps of:

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