JP2016117059A - Filtration centrifugal separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtration centrifugal separator which can improve mounting of a filter cloth onto a filtration drum by fastening means.SOLUTION: A filtration centrifugal separator is equipped with a filtration drum 10, a filter cloth 30 and a fastening ring 40. The filtration drum has a peripheral groove 19 formed on an inner surface 21, and the filter cloth can be inserted into the filtration drum. When the filter cloth is inserted into the filtration drum, the filter cloth defines an axial direction X and a radial direction R, forms a hollow cylindrical shape having a peripheral edge part 32 at a shaft end part, and holds a solid matter from a suspension, and through which a liquid of the suspension can pass. The filter cloth 30 has a peripheral ribbon structure 34, which is formed by at least two ribbon layers 36, 38, at the peripheral edge part. When the filter cloth is inserted into the filtration drum, the peripheral ribbon structure is received by the peripheral groove 19 of the filtration drum, the fastening ring is spring elastically soft in the radial direction and can be located in the filtration drum so as to press the peripheral ribbon structure received by the peripheral groove onto the filtration drum radially outwards.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a filter drum, a filter cloth having a peripheral ribbon structure, and a filter cloth provided separately from the filter drum, and integrally formed in a closed state, by pressing the peripheral ribbon structure radially outwardly against the filter drum. The invention relates to the technical field of filtration centrifuges, such as filtration centrifuges for filtering solids from solid-liquid suspensions, with clamping rings that remain firmly held on the filtration drum.

  Filtration centrifuges are used, for example, in the pharmaceutical industry, food industry, and chemical industry that produce pharmaceuticals, foods, or purified chemicals.

  As possible structural types of filtration centrifuges, for example, discontinuous peeler centrifuges are known. This is provided with a filtration drum, and the filtration drum is rotatably supported by a housing, and a solid-liquid suspension to be filtered is a suspension that projects into the filtration drum. Supplied by a feeding device. In addition, a solids discharge device projects into the filtration drum, using which the filtered solids are discharged from the filtration drum. In addition, the peeler centrifuge is provided with filtration means, usually a filter cloth, on the inner wall of the filtration drum, which separates solids from the solid-liquid suspension, in particular by means of clamping means, for example. It is held firmly so that it does not shift substantially in the filter drum.

  During operation, the solid-liquid suspension to be filtered is fed to a rotary filtration drum via a suspension feeder. By rotation of the filtration drum, the solid-liquid suspension to be filtered is pressed radially outward against the radial inner wall of the filtration drum, i.e. against the filter cloth. The suspension liquid penetrates the solids and filter cloth deposited on the filter cloth and is drained from the filter drum (eg, using drain holes or drains) or rather centrifuged. The solid matter remains as a filter cake on the filter cloth. For example, when the liquid and the solid matter are separated to the extent necessary by centrifuging the liquid, the filter cake is peeled off using the discharge device. The solids are finally discharged from the filter drum using a peeling knife.

  As described above, the filter cloth is placed in the filter drum so that the filter cloth is not wrinkled or bypassed by solids due to filter cloth slippage to prevent filter breakage, product loss, and product contamination. A tight attachment is important to the function of such a filtration centrifuge. In particular, the generation of wrinkles can lead to breakage of the filter cloth by the peeling knife during solid discharge, which can mean increased downtime, re-washing, and filter cloth replacement costs.

  Similarly, the attachment of the filter cloth to the filter drum should be easy and quick for the operator, preferably by one person, and the tightening means associated with the filter cloth is cost-effective and can be filtered and centrifuged. It is necessary to be suitable to maximize the width of the field of application of the separator. In order to maintain the number of different filter cloths and corresponding mounting means and keep manufacturing costs and storage costs low, it is particularly suitable for the filtration of various substances as much as possible, such as solid-liquid suspensions containing solvents. is necessary.

  Therefore, under the above-described requirements, it is continuously desired to improve the attachment of the filter cloth to the drum by the tightening means.

  In the present invention, the filter cloth can be attached to the filter drum in several steps without tools by the tightening means, the tightening means is formed to be suitable for a plurality of fields of use of the filter centrifuge, and the filter cloth is firmly attached. A centrifuge is provided. This prevents slippage of the filter drum on the filter drum, and at the same time, simple and quick installation is achieved, and manufacturing costs and storage costs are kept low. Furthermore, the clamping ring and filter cloth can be easily manufactured from cost-effective materials, thereby keeping the cost of the clamping means and filter cloth low.

  According to one aspect of the invention, a filtration centrifuge that filters solids from a solid-liquid suspension (eg, a discontinuous (peeler) centrifuge, such as the centrifuge described in the background of the invention). Is formed on the (radial) inner surface (for example the radial inner surface of the filter jacket of the filtration drum) and extends in the circumferential direction (for example continuously circumferentially, for example fully or 360 degrees continuously circumferentially) A filtration drum having a peripheral groove, and can be inserted into the filtration drum, and when inserted into at least the filtration drum, defines an axial direction and a radial direction, and a peripheral edge portion (for example, a first shaft) A hollow cylindrical shape having a first peripheral edge at the end and a second peripheral edge at the second shaft end to hold the solid from the suspension to be filtered and to be filtered. Configured to allow turbid liquids to pass through And at least one of the peripheral edges is formed by at least two ribbon layers (e.g., just two, just three, just four, etc.) that are at least substantially overlapped and affixed to each other. A filter cloth having a peripheral ribbon structure, wherein the filter cloth is received in the peripheral groove of the filter drum when the filter cloth is inserted into the filter drum; Is formed separately (e.g., as a separate part), is integrally formed in a closed state, is radially and spring-elastically flexible, and includes the peripheral ribbon structure received in the peripheral groove, Pressing the filter drum radially outward (eg, spring-elastically tightened) so that the filter cloth remains firmly held by the filter drum Provided can be disposed within the opposed the filtration drum, and clamping ring, to. The feature that the tightening ring is integrally formed in a closed state means that the closed ring (shape) is provided as an integral (integrated body). That is, the clamping ring is a non-removable endless ring (ie, a non-removable endless ring) whose ring shape cannot be opened non-destructively (again). That is, in order to (re-) open the ring shape, a portion of the clamping ring may cause the connection to form an endless ring shape by mechanically or thermally cutting the ring (for example, mechanically or thermally) Need to be broken (by breaking the connection). Therefore, there are no detachable fasteners in the clamping ring and therefore must be elastically deformed radially inward in order to be inserted into the drum. According to one embodiment, the ring is formed as a monolithic integration. Further, the peripheral ribbon structure does not include, for example, a support screen (structure) and / or a support strainer, for example, on which the filter cloth is held and / or supported. That is, in the peripheral ribbon structure, such support sieves (structures) and / or support strainers are omitted or absent. According to one embodiment, the peripheral ribbon structure and / or a portion of the filter cloth adjacent to the peripheral ribbon structure is deformed radially outward such that the peripheral ribbon structure can be pressed against the peripheral groove by a clamping ring. Has the flexibility possible. The flexibility is provided at a low pressure, such as a pressure lower than 5 bar or 2 bar, acting radially outward on the peripheral ribbon structure and is sufficient for the deformation.

  The radial pressing force of the clamping ring is based on its radial spring elasticity, and accordingly the clamping ring is pressed, for example, somewhat radially inward for insertion into the filtration drum. And when arrange | positioning to a filtration drum as mentioned above, it will return to an original shape with the elastic restoring force, and the peripheral ribbon structure received by the peripheral part is pressed on a filtration drum to radial direction outward.

  The peripheral ribbon structure is formed of, for example, the same material as the filter cloth, for example, the same woven material. However, the ribbon layer of the peripheral ribbon structure may be formed from a material different from and / or different from the filter cloth.

  The peripheral ribbon structure is, for example, stitched, welded, or adhered to the one peripheral edge of the filter cloth. For example, the ribbon layers of the peripheral ribbon structure may be stitched and / or welded and / or glued together and then stitched and / or welded and / or glued in common to the filter cloth as a package. However, the ribbon layer of the peripheral ribbon structure may be stitched and / or welded and / or adhered to the filter cloth in sequence.

  The ribbon layers of the peripheral ribbon structure have, for example, different widths in the axial direction, for example, the outer ribbon layer in the radial direction has a narrower or wider width in the axial direction than the inner ribbon layer in the radial direction (for example, Depending on the cross-sectional shape of the peripheral groove). Furthermore, the ribbon layer is of the same thickness as seen from the radial direction, for example, may be the same thickness as the filter cloth, or different from the filter cloth, for example in the radial direction (eg depending on the cross-sectional shape of the peripheral groove). And / or have different thicknesses. Further, the volume of the peripheral ribbon structure is, for example, at least substantially equal to the volume of the peripheral groove, and the peripheral ribbon structure is, for example, substantially completely occupying the peripheral groove. Therefore, the peripheral ribbon structure can achieve a mating of the peripheral ribbon structure in the corresponding peripheral groove with as little dead spot as possible and as accurate and / or conformal as possible. Can be adapted to the shape.

  One ribbon layer of the peripheral ribbon structure is optionally the innermost ribbon layer in the radial direction, but the one ribbon layer is, for example, by the filter cloth, optionally one peripheral edge of the filter cloth. Formed by the part.

  The at least two ribbon layers of the peripheral ribbon structure are optionally all ribbon layers of the peripheral ribbon structure, but the at least two ribbon layers are, for example, via folding the peripheral edge of the filter cloth. And optionally formed by the filter cloth through hemming the peripheral edge of the filter cloth.

  The innermost ribbon layer in the radial direction includes a flap part or a torque part that extends toward the filter cloth outside the peripheral groove and overlaps the filter cloth, and the flap part or the torque part is used to The peripheral ribbon structure is fixed to the filter cloth.

  The filter cloth is made of, for example, a woven material, and optionally a plastic woven material. Furthermore, the filter cloth is, for example, a filter cloth that is closed and integrally formed in the circumferential direction. The latter means that a closed circumferential shape is integrally formed.

  The clamping ring is, for example, a clamping ring made from metal, optionally spring steel. The clamping ring is produced, for example, monolithically or by bending a flat strip into a ring shape and welding between the edges of the abutting longitudinal ends. The clamping ring may be arranged, for example, in such a way that when the peripheral ribbon structure is arranged between the peripheral groove and the clamping ring, a radially acting pressing force is applied to the peripheral ribbon structure by the outside of the clamping ring. Having a diameter that is at least substantially equal to or slightly smaller (outer diameter) than the diameter of the peripheral groove.

It is a typical sectional view of a filtration centrifuge concerning various embodiments of the present invention. It is an enlarged view of the area | region A of FIG. 1 which shows 1st Embodiment of this invention. It is an enlarged view of the area | region A of FIG. 1 which shows 2nd Embodiment of this invention. It is an enlarged view of the area | region A of FIG. 1 which shows 3rd Embodiment of this invention. It is an enlarged view of the area | region A of FIG. 1 which shows 4th Embodiment of this invention. It is an enlarged view of the area | region A of FIG. 1 which shows 5th Embodiment of this invention.

  In the drawings, the same reference numerals are used for identical or similar parts.

  The present invention will be described in detail using embodiments with reference to the drawings.

  As shown in FIGS. 1 and 6, a filtration centrifuge 1 that filters solid matter from a solid-liquid suspension according to various embodiments of the present invention includes a filter cloth 30 and a tightening ring 40.

  A filtration drum 10 according to various embodiments of the present invention is connected to a drum jacket 11 having a hollow cylindrical shape and a shaft end portion of the drum jacket 11 (for example, the right end portion of the drum jacket 11 in FIG. 1). The first drum bottom 13 crossing this end of the drum jacket 11 is connected to the other (for example, the opposite side) shaft end of the drum jacket 11 (for example, the left end of the drum jacket 11 in FIG. 1), and the central opening 17 A second drum bottom (drum collar) 15.

  Furthermore, the filtration drum 10 according to various embodiments of the present invention is provided on the (radial) inner surface 21 of the filtration drum 10 on the first shaft side 12 of the filtration drum 10 and optionally on the first shaft side of the drum jacket 11. One (for example, first) peripheral groove 19 is formed on the inner surface (in the radial direction) of the jacket 11. Further, the filtration drum 10 is disposed on the (radial) inner surface 21 of the filtration drum 10 on the second shaft side 14 of the filtration drum 10 opposite to the first shaft side of the filtration drum, and optionally on the first side of the filtration drum. For example, a second peripheral groove 20 is provided on the inner surface (in the radial direction) of the drum jacket 11 on the second shaft side of the drum jacket 11 opposite to the shaft side. Further, the peripheral groove 19 extends in the circumferential direction of the filtration drum 10, optionally in the circumferential direction of the drum jacket 11. The peripheral groove 20 also extends in the circumferential direction of the filtration drum 10 and optionally in the circumferential direction of the drum jacket 11.

  The filter cloth 30 according to various embodiments of the present invention can be inserted into the filtration drum via the opening 17 (for example, in a state where a centrifugal cover 43 described later is opened). The filter cloth 30 has a hollow cylindrical shape that defines an axial direction X and a radial direction R when inserted into at least the filtration drum 10 (see FIGS. 2 to 6). For example, the filter cloth 30 can be inserted into the filter drum 10 and forms a hollow cylindrical shape, closed circumferentially (for example by stitching between both edges of the longitudinal end of the filter cloth sheet). It may be formed as a filter cloth. Otherwise, the filter cloth 30 can be inserted into the filter drum 10 by overlapping both longitudinal ends of the filter cloth sheet inside, and forms a hollow cylindrical shape in the filter drum 10 (open It may also be formed as a filter cloth sheet). In addition, the filter cloth 30 includes a peripheral edge at the shaft end, and includes, for example, a first peripheral edge at the first shaft end of the filter cloth 30 and a second peripheral edge at the second shaft end. 2 to 6, only one peripheral portion 32 at the shaft end portion of the filter cloth 30, which is on the left side with reference to FIG. 1, is illustrated.

  The filter cloth 30 is further configured to retain solids from the filtered suspension and allow the liquid of the filtered suspension to pass through. For this reason, the filter cloth 30 is made of a woven material having a predetermined mesh size (or pore width) for filtration, such as a plastic woven material, such as a polypropylene woven material, but is not limited thereto. . For example, the filter cloth 30 may be made from a felt material, or the filter cloth 30 may be a knitted filter cloth. Basically, the filtration properties and material properties of the filter cloth may be selected to suit the intended field of application and its use in the centrifuge.

  Furthermore, the filter cloth 30 according to various embodiments of the present invention includes a peripheral ribbon structure 34 at the peripheral edge of at least one (for example, only one or both) of the peripheral edges. The peripheral ribbon structure 34 is at least substantially overlapping each other in the radial direction R and at least two (eg, stitched together and / or welded together) at least two (eg, just two, just three, just four, etc.) ) Ribbon layer. When the filter cloth 30 is inserted into the filtration drum 10, the peripheral ribbon structure 34 is received in the peripheral groove 19 of the filtration drum 10. The ribbon layers may have different widths in the axial direction X, for example, the outer ribbon layer in the radial direction R has a narrower or wider width in the axial direction X than the inner ribbon layer in the radial direction R ( (For example, depending on the cross-sectional shape of the peripheral groove). The ribbon layer is also of equal thickness when viewed in the radial direction R, for example it may be the same thickness as the filter cloth 30 or in the radial direction R (for example depending on the cross-sectional shape of the peripheral groove) It may have different thicknesses and / or different from each other. Further, the volume of the peripheral ribbon structure is, for example, at least substantially equal to the volume of the peripheral groove, and the peripheral ribbon structure is, for example, substantially completely occupying the peripheral groove. Accordingly, the peripheral ribbon structure 34 corresponds to the filter drum 10 so as to achieve a mating of the peripheral ribbon structure 34 in the corresponding peripheral groove with as little dead spot as possible and as accurate and / or conformal as possible. It can be adapted to the shape of the peripheral groove.

  In the first embodiment shown in FIG. 2 of the present invention, the peripheral ribbon structure 34 is formed by two ribbon layers 36 and 38, one disposed on the other. Further, the peripheral ribbon structure 34 in FIG. 2 is stitched to one peripheral edge 32 of the filter cloth 30. For example, the two ribbon layers 36 and 38 may be stitched together and then commonly stitched to the filter cloth 30 as a package. However, the two ribbon layers 36 and 38 may be sequentially sewn to the filter cloth 30. However, the peripheral ribbon structure 34 of the first embodiment may be additionally or alternately attached to the peripheral edge 32 of the filter cloth 30 by different methods such as welding and / or adhesion. In the first embodiment of the present invention, the peripheral ribbon structure 34 (and / or the ribbon layers 36 and 38 of the peripheral ribbon structure 34) is made from the same woven material as the filter cloth 30. This has the advantage, among other things, that the durability of the peripheral ribbon structure is at least substantially the same as the durability of the filter cloth 30, thereby premature wear of the peripheral ribbon structure 34 compared to the filter cloth 30. In addition, the filter cloth 30 is prevented from being damaged due to poor mounting on the filter drum 10.

  In the second embodiment shown in FIG. 3 of the present invention, the peripheral ribbon structure 34 ′ according to the second embodiment has two ribbon layers 36 ′ and 38 ′ (for example, the first ribbon), one disposed on the other. Formed by layer 36 'and second ribbon layer 38'). In the second embodiment of the present invention, the two ribbon layers 36 ′ and 38 ′ may be attached to the filter cloth 30 by stitching, welding and / or bonding as already described for the first embodiment of the present invention. Good. The two ribbon layers 36 ′ and 38 ′ in the second embodiment of the present invention are made of a material different from that of the filter cloth 30. Further, the two ribbon layers 36 ′ and 38 ′ in the second embodiment may be made of a material different from the filter cloth 30 and different from each other, for example, a plastic material, a rubber material, a felt material, or the like. For example, the filter cloth 30 may be made from a woven material, while the ribbon layers 36 'and 38' are not made from the woven material, respectively, such as plastic (eg, flat plastic strip), rubber, felt, etc. For example, made from a monolithically and / or monolithically formed strip.

  In the third embodiment shown in FIG. 4 of the present invention, one (for example, the first) ribbon layer 36 ″ of the two ribbon layers of the peripheral ribbon structure 34 ″ according to the third embodiment is arbitrarily Is the innermost layer in the radial direction R but is formed by the filter cloth 30 and optionally by the peripheral edge 32 of the filter cloth 30. The second ribbon layer 38 ″ may be attached to the filter cloth 30, for example, via stitching, welding and / or bonding as described above. Therefore, the second ribbon layer 38 ″ is made from the same fabric material as the filter cloth 30. As a result, the durability of the peripheral ribbon structure 34 ″ is the same as that of the filter cloth 30, as described above for the first embodiment. However, the second ribbon layer 38 ″ may be made of a material different from the filter cloth 30, for example, a plastic material, a rubber material, a felt material, or the like. For example, the filter cloth 30 may be made from a woven material, while the second ribbon layer 38 '' is not made from a woven material, respectively, for example plastic (eg flat plastic strip) or rubber, eg one piece. It is made from strips that are formed monotonically and / or monolithically.

  In the fourth embodiment shown in FIG. 5 of the present invention, the peripheral ribbon structure 34 ′ ″ is formed by three ribbon layers 36 ′ ″, 38 ′ ″ and 39 and is the innermost in the radial direction R. The ribbon layer 39 includes a flap portion 39 ′ that runs toward the filter cloth 30 outside the peripheral groove and overlaps the filter cloth 30, and the peripheral ribbon structure 34 ′ ″ is used to filter the filter cloth 30 by using the flap portion. 30 (e.g. stitched and / or welded and / or glued). However, the peripheral ribbon structure 34 ′ ″ may comprise only two ribbon layers, namely a ribbon layer 39 that is innermost in the radial direction R and has a flap portion 39 ′, and a second ribbon layer 36. . Ribbon layers 36 "", 38 "", and 39 may each be formed from the same material as filter cloth 30, or may be formed from materials different from and / or different from the filter cloth. For example, the ribbon layer 39 may be formed from the same fabric material as the filter cloth 30, while the ribbon layers 36 ″ ″ and 38 ″ ″ may be formed from a different material than the filter cloth 30.

  In a fifth embodiment of the present invention, as shown in FIG. 6, at least two (eg, just two, just three, just four, etc.) ribbon layers of the peripheral ribbon structure 34 ″ ″ fold back the peripheral edge 32. And, optionally, formed by the filter cloth 30 through sewing (or taking a hem) by folding the peripheral edge 32 times. For example, all ribbon layers 36 "" "of the peripheral ribbon structure 34" "" may be formed by the filter cloth 30, as in FIG. However, a certain number (eg, just two, just three, just four, etc.) of ribbon layers may be formed by the filter cloth 30 and additional ribbon layers may be attached to the ribbon layer formed by the filter cloth 30. The peripheral ribbon structure 34 '' '' shown in FIG. 6 according to the fifth embodiment of the present invention in which all the ribbon layers 36 '' '' are formed by the filter cloth 30 also has the same durability as the filter cloth. It has the above-mentioned advantage of having the property.

  The fastening ring 40 according to various embodiments of the present invention is formed separately from the filter cloth 30. Thereby, for example, in the case of wear of the tightening ring 40, it is necessary to replace only the tightening ring cost-effectively, and the filter cloth 30 can be continuously used. Furthermore, the clamping ring 40 is in a closed state and is formed as a single piece (ie the clamping ring is in the form of an endless ring, ie the ring shape is not opened non-destructively (again)). That is, in order to (re-) open the ring shape, a portion of the clamping ring may cause the connection to form an endless ring shape by mechanically or thermally cutting the ring (for example, mechanically or thermally) Need to be broken) by breaking the connection). The clamping ring 40 is formed by pressing the peripheral ribbon structures 34, 34 ′, 34 ″, 34 ′ ″, and 34 ″ ″ received in the peripheral grooves radially outward against the filter drum 10. The cloth 30 can be placed inside the filtration drum 10 facing the peripheral groove 19 so that the cloth 30 remains firmly held on the filtration drum 10. For this reason, the clamping ring 40 is configured such that when the peripheral ribbon structures 34, 34 ′, 34 ″, 34 ′ ″ and 34 ″ ″ are disposed between the peripheral groove 19 and the clamping ring 40, For example, the perimeter of the filtration drum so that a radially acting pressing force is applied to the peripheral ribbon structures 34, 34 ′, 34 ″, 34 ′ ″ and 34 ″ ″ by the outer 41 of the 40. It has a diameter that is at least substantially equal to or slightly smaller than the diameter of the groove 19 (outer diameter). Further, the clamping ring 40 is flexible in a radial and spring-elastic manner and can be inserted into the filtration drum 10 by being pressed outward and inward in the radial direction. Return to shape. The above-described tightening ring 40 does not require a special tool for mounting on the filtration drum 10 and can be easily mounted and detached manually by a single person through a simple process. And the downtime of the filtration centrifuge 1 is reduced.

  The clamping ring 40 according to various embodiments of the present invention may be a clamping ring made from metal, optionally spring steel. In addition, the clamping ring can be made monolithically (for example, cast as an endless ring in a single mold), or a flat (metal) strip can be bent into a ring shape between the edges of the abutting longitudinal ends. It may be created via welding (ie the ring shape cannot be opened non-destructively (again)). The ends of the flat strips may overlap and may be nondestructively welded together, riveted or otherwise secured. However, the clamping ring can also be made from a material different from metal, for example plastic or a combination of materials. Using a clamping ring made of metal can be produced cost-effectively. Furthermore, clamping rings made of metal are suitable for several fields of application of filtration centrifuges, especially the pharmaceutical industry, have a long life and are recyclable.

  As shown in FIG. 1, the filtration centrifuge 1 according to various embodiments of the present invention further includes a centrifuge cover 43 that is pivotally connected to the machine frame 45 or the apparatus housing so as to open. In the centrifuge cover 43, a suspension supply device 55 that supplies a solid-liquid suspension to the filtration drum 10 and a solid matter discharge device 50 that discharges solid matter from the filtration drum 10 are attached. When the centrifuge cover 43 is closed, the centrifuge cover 43 closes the opening 17 of the filtration drum 10 in a sealed state, and the suspension supply device 55 and the solid matter discharge device 50 are connected to the filtration drum 10. The filter drum 10 is surrounded together with the machine frame 45 so that the filter drum 10 is disposed in a space 47 formed in a sealed state between the centrifuge cover 43 and the machine frame 45. Further, the liquid discharge device 57 connected to the space 47 is provided in the machine casing 45 at the height of the lowest point of the space 47. The filtration drum 10 is connected to the drive shaft 60 on one side and attached to the machine frame 45 by the drive shaft 60 in a protruding state. The filtration drum 10 is driven by the torque transmitted from the driving device 65, for example, electric drive, via the transmission device 70, for example, the belt drive, chain drive, or gear drive shown in FIG. The However, the drive shaft 60 may be connected to the drive device 65 via a clutch, or may be integrally formed with the output shaft of the drive device 65.

  The function of the filtration centrifuge shown in FIG. 1 is as follows. The solid-liquid suspension to be filtered is supplied to the filtration drum 10 by the suspension supply device 55. The filtration drum 10 is rotated by the driving device 65, whereby the solid-liquid suspension is pressed against the inner surface 21 of the filtration drum 10. The liquid of the solid-liquid suspension can permeate the filter cloth 30 attached to the inner surface 21 and the filter drum 10 (for example, using the hole of the filter drum 10). The centrifuge cover (for example, the inner wall of the centrifuge cover) 43 and the machine frame 45 can be centrifuged. The liquid is finally discharged from the space 47 by the liquid discharge device 57. The solid matter of the solid-liquid suspension remains on the filter cloth 30 and is separated from the solid-liquid suspension in this manner. Finally, when the liquid is sufficiently discharged, the solid matter present on the filter cloth 30 as a filter cake is passed through the solid matter discharge device 50 by using the solid matter discharge device 50 to control, for example, rotation of the filtration drum 10. By removing the solid matter from the filter cloth 30 (for example, using a peeling knife provided in the solid matter discharge device 50), the solid matter is removed from the filter cloth 30 and discharged from the filter drum 10 using the solid matter discharge device 50. Is done.

Claims (11)

A filtration centrifuge for filtering solids from a solid-liquid suspension,
A filtration drum having a peripheral groove formed on the inner surface and extending in the circumferential direction;
The suspension that can be inserted into the filtration drum and forms a hollow cylindrical shape that defines an axial direction and a radial direction and has a peripheral edge at the axial end when inserted into the filtration drum, and is filtered. The suspension is configured to be able to pass the liquid of the suspension to be retained and filtered from the suspension, and at least substantially overlaps at least one of the peripheral edges. A filter cloth comprising a peripheral ribbon structure formed by at least two ribbon layers adhered to each other and when the filter cloth is inserted into the filter drum, the peripheral ribbon structure of the filter drum A filter cloth received in the peripheral groove;
It is formed separately from the filter cloth, is integrally formed in a closed state, is radially and spring-elastically flexible, and the peripheral ribbon structure received in the peripheral groove is radially A clamping ring that can be disposed inside the filtration drum opposite the peripheral groove so that the filter cloth remains firmly held by the filtration drum by pressing outwardly against the filtration drum;
A filtration centrifuge characterized by comprising:   The filtration centrifuge according to claim 1, wherein the peripheral ribbon structure is formed of the same material as the filter cloth.   The filtration centrifuge according to claim 1 or 2, wherein the peripheral ribbon structure is stitched and / or welded and / or adhered to the one peripheral edge of the filter cloth.   The one ribbon layer of the peripheral ribbon structure is optionally the innermost ribbon layer in the radial direction, but the one ribbon layer is formed by the filter cloth. The filtration centrifuge according to any one of 3.   The at least two ribbon layers of the peripheral ribbon structure are optionally all ribbon layers of the peripheral ribbon structure, but the at least two ribbon layers are folded through the peripheral edge of the filter cloth, The filtration centrifuge according to any one of claims 1 to 4, wherein the filter centrifuge is formed by the filter cloth, optionally through hemming the peripheral edge of the filter cloth.   The innermost ribbon layer in the radial direction includes a flap portion that extends toward the filter cloth outside the peripheral groove and overlaps the filter cloth, and the peripheral ribbon structure is filter cloth using the flap portion. The filtration centrifuge according to any one of claims 1 to 3, wherein the filtration centrifuge is fixed to the filter centrifuge.   The filter centrifuge according to any one of claims 1 to 6, wherein the filter cloth is made of a woven material, and optionally a plastic woven material.   The filter centrifuge according to any one of claims 1 to 7, wherein the filter cloth is a filter cloth that is integrally formed by being closed in a circumferential direction.   9. A filtration centrifuge according to any one of the preceding claims, wherein the clamping ring is a clamping ring made from metal, optionally spring steel.   The fastening ring is made monolithically, or the fastening ring is made by bending a flat strip into a ring shape and welding between edges of the abutting longitudinal ends. Item 10. The filtration centrifuge according to any one of Items 1 to 9.   11. The volume of the peripheral ribbon structure is at least substantially equal to the volume of the peripheral groove, and the peripheral ribbon structure occupies the peripheral groove substantially completely. The filtration centrifuge according to item.

Images