WO2014199420A1 - 遠心分離装置 - Google Patents
遠心分離装置 Download PDFInfo
- Publication number
- WO2014199420A1 WO2014199420A1 PCT/JP2013/003738 JP2013003738W WO2014199420A1 WO 2014199420 A1 WO2014199420 A1 WO 2014199420A1 JP 2013003738 W JP2013003738 W JP 2013003738W WO 2014199420 A1 WO2014199420 A1 WO 2014199420A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wing
- bowl
- blade
- inner peripheral
- peripheral surface
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/04—Periodical feeding or discharging; Control arrangements therefor
- B04B11/05—Base discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/02—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles without inserted separating walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
- B04B2011/086—Skimmers or scrapers for discharging ; Regulating thereof with a plurality of scraper blades
Definitions
- the present invention relates to a technique for automatically discharging separated solids after centrifugation in a centrifuge that performs centrifugation using a bowl that rotates about a vertical rotation axis.
- the separated solids deposited in the bowl after centrifugation are discharged from the outlet provided at the bottom of the bowl.
- the discharge port at the bottom of the bowl is designed to be smaller than the bowl inner diameter at the center of the bowl in the vertical direction.
- the lump of separated solids also referred to as “cake”
- the diameter of the separated solid deposited in an annular shape is Is larger than the diameter of the bowl outlet.
- the separated solid matter deposited in an annular shape having a diameter larger than that of the discharge port as described above may remain in the vicinity of the discharge port in the bowl even when lowered toward the discharge port, and may not be easily discharged.
- the ring-shaped separated solids deposited on the inner peripheral surface of the ring are relatively strong, the ring-shaped separation will occur even if the separated solids are discharged by rotating the wings provided inside the bowl with respect to the bowl. In some cases, the solid matter slides with respect to the inner peripheral surface of the bowl, the separated solid matter rotates integrally with the wing, and the separated solid matter cannot be lowered to the outlet at the bottom of the bowl.
- the present invention has been made to solve the above-described problems, and in a centrifuge that performs centrifugation using a bowl that rotates about a vertical rotation axis, the separated solids after centrifugation are automatically extracted from within the bowl.
- the purpose is to provide technology for discharging.
- one embodiment of the present invention rotates around a vertical axis and functions as a supply port for a liquid to be processed and also functions as a discharge port for a separated solid that is centrifuged from the liquid to be processed.
- An opening is provided at the center of the lower part, and a bowl having a tapered portion in which the radius of the inner peripheral surface decreases toward the opening as it goes downward, and at a plurality of locations in the circumferential direction on the inner peripheral surface of the tapered portion of the bowl Protrusions provided and projecting from the inner peripheral surface, and rotating around the vertical axis in the bowl, and separated solids in the bowl when rotating relative to the bowl in a predetermined rotation direction
- a wing that conveys the wing toward the opening, and the bowl and the wing are rotated together by moving the wing to a first height position, and the wing is moved to the first height position.
- a portion corresponding to the protrusion of the wing is related to a centrifugal separator that is cut out in a shape that does not collide with the protrusion when the wing and the bowl rotate relative to each other.
- a technology for automatically discharging separated solids after centrifugation from a bowl in a centrifuge that performs centrifugation using a bowl that rotates about a vertical rotation axis. can be provided.
- FIG. 1 is a schematic diagram illustrating the configuration of a centrifuge according to the first embodiment.
- the centrifuge 1 centrifuges the liquid to be processed, which is the object of the centrifuge process, and separates it into a liquid and a solid material.
- a liquid to be processed includes a plurality of types of liquids having different specific gravities, a light liquid with a low specific gravity, a heavy liquid with a high specific gravity, and a solid substance are used. It is also possible to separate them.
- the centrifugal separator 1 of the present embodiment has a structure in which, for example, a bowl-shaped centrifugal separator body 3 is attached to a frame 2 provided on a base 11. it can.
- One end of the upper part of the frame 2 is detachably connected to the upper part of the casing 4 of the centrifugal separator main body 3 described later, and a main body driving motor 71 is disposed on the other end side.
- a wing drive motor 73 is moved upward / downward with respect to the frame 2 above the portion where the centrifugal separation device main body 3 on the one end side of the upper portion of the frame 2 is attached, and a discharge member to be described later
- a cylinder 241 for moving the position of the wing 6 as an upward / downward direction, a brake 243 for stopping the rotation of the bowl 5 by contacting an upper part of a rotating shaft 52 of the bowl 5 described later, and the like are provided. These cylinder 241 and brake 243 are each driven by an actuator (not shown).
- the main body driving motor 71 that is driven when the liquid to be treated is centrifuged, the positioning of the bowl 5 and the wing 6 described later, and the discharging operation of the solid matter generated during the centrifugation.
- a wing drive motor 73 to be driven.
- the main body drive motor 71 is attached to the frame 2 and its drive shaft projects from above the motor main body.
- the main body driving motor 71 has a pulley 710 attached to a driving shaft, and transmits the rotational driving force of the main body driving motor 71 to the bowl 5 via a driving belt 711 spanned around the pulley 710.
- the wing drive motor 73 is attached to the upper portion of the frame 2 via the support member 244 via the cylinder 241 so that the drive shaft thereof is coaxially positioned with the rotation shaft 62 of the wing 6 described later.
- the drive shaft of the wing drive motor 73 is located below the wing drive motor 73 and is disposed so as to face the upper end of the rotation shaft 62 of the wing 6.
- the distal end of the drive shaft of the wing drive motor 73 and the upper end of the rotary shaft 62 of the wing 6 have a coupler structure that engages by moving in a direction close to each other.
- the centrifuge body 3 includes a casing 4 connected to the frame 2 via a support member 244, and a bowl that is rotatably accommodated around the vertical axis in the casing 4 and is rotatably supported by the support member 244. 5 and a wing 6 as a discharge member, which is accommodated rotatably around the vertical axis A (see FIG. 2) in the bowl 5 and discharges solids in the bowl 5 to the outside of the bowl.
- the casing 4 has one end of the side surface connected to the frame 2 by a fastening bolt (not shown) and the like.
- a liquid discharge part 43 is provided so as to protrude outside the casing 4.
- an overflow discharge nozzle 44 is provided on the upper end side of the casing 4.
- the discharge nozzle 44 can be used to overflow the cleaning liquid when, for example, the inside of the casing 4 is washed with sealed water.
- a detachable lid 41 is attached to the lower part of the casing 4.
- a support member 244 for supporting the casing 4, the bowl 5, the wing 6, and the like is provided on the upper portion of the frame 2.
- the upper part of the casing 4 is detachably connected to the lower part of the support member 244. That is, the lower part of the support member 244 also functions as a lid for covering the upper part of the casing 4.
- the support member 244 is provided with a light liquid discharge portion 25 for discharging a light liquid that is separated and generated when the liquid to be treated is centrifuged so as to communicate with the upper part of the internal space of the bowl 5.
- the bowl 5 is integrally formed with a bowl main body 51 to which a liquid to be treated is supplied, a substantially lid-shaped taper portion 510 that is detachably attached to a lower portion of the bowl main body 51 by a fixing means such as a bolt, and an upper portion of the bowl main body 51. And a rotation shaft 52 that is supported by the support member 244 so as to be rotatable about a vertical axis.
- the bowl body 51 has a substantially cylindrical shape that is smaller than the casing 4.
- the taper portion 510 has a substantially annular shape in a plane, and receives in the bowl 5 a liquid to be treated supplied from a supply pipe 42 arranged outside the bowl 5 and in the casing 4.
- a substantially circular hole 510a (opening) for discharging the solid substance (cake) centrifuged in step 5 from the bowl 5 is formed.
- the taper portion 510 has a radius of the inner peripheral surface as it goes downward as a function of facilitating discharge of the solid (cake) in the bowl 5 as one of its functions. It has a cross-sectional shape that decreases toward 510a (opening).
- the rotating shaft 52 of the bowl 5 is rotatably supported by the support member 244 via a bearing mechanism 521 such as a bearing.
- a hollow rotation support portion 520 is formed at the center of the rotating shaft 52 of the bowl 5 in order to support the wing 6 in a rotatable manner. In this way, the wing 6 rotates about the vertical central axis A in the bowl 5 and, when rotating relative to the bowl 5 in a predetermined rotation direction, the solids in the bowl are removed from the hole 510a. Transport toward (opening).
- the wing 6 has a structure in which a plurality of plate-like blade portions 621 to 623 protrudes outward in the rotational radial direction from a shaft member 610 serving as a rotation center.
- a main body 61 and a rotating shaft 62 provided coaxially with the shaft member 610 and projecting upward from the wing main body 61 are provided.
- the three blade portions 621 to 623 are configured such that the blade portions having the same shape form an angle of 120 degrees between adjacent wings in the circumferential direction around the shaft member 610 rotating around the rotation axis A. Is provided.
- the blade surfaces of the blade portions 621 to 623 are formed to be twisted in the clockwise direction when viewed from above.
- the wing 6 is rotatably supported with respect to the bowl 5 and the support member 244 by inserting the rotation shaft 62 into the rotation support portion 520 of the rotation shaft 52 of the bowl 5 described above.
- Each blade portion 621 to 623 of the wing 6 has an outer diameter smaller than the inner diameter of the bowl 5 so as to be rotatable relative to the bowl 5 inside the bowl 5.
- the centrifuge 1 is provided with an alignment mechanism for aligning the wing 6 and the bowl 5 at a predetermined phase around the rotation axis, for example, at one location around the rotation axis.
- this alignment mechanism a plurality of grooves and a plurality of protrusions fitted into the grooves are formed on the upper side of the rotating shafts 62 and 52 of the wing 6 and the bowl 5, and the rotating shafts 62 and 52 are relative to each other.
- the wing 6 and the bowl 5 are in a predetermined angular position relationship about the rotation axis. It is structured to be aligned only by fitting.
- the alignment mechanism is detachably provided on the upper end side of the rotating shaft 62 of the wing 6 and the index ring 53 provided on the upper end of the rotating shaft 52 of the bowl 5 and engages with the index ring 53.
- An inner ring 63, and a protrusion is formed on the index ring 53 side and a groove is formed on the inner ring 63 side.
- the protrusion is not necessarily provided on the index ring 53 side.
- a protrusion may be provided on the inner ring 63 side and a groove that engages with the protrusion may be provided on the index ring 53 side.
- both the protrusion and the groove may be provided on the inner ring 63 side, and both the groove and the protrusion engaging with the protrusion and the groove may be provided on the index ring 53 side.
- the inner ring 63 has a substantially planar annular shape whose outer diameter is slightly smaller than the inner diameter of the index ring 53, and a planar circular hole 631 for receiving the rotation shaft 62 of the wing 6 is formed at the center. Is done.
- the hole 631 is provided with a notch for fitting a positioning projection (not shown) provided on the rotating shaft 62 of the wing 6.
- the inner ring 63 has a shape in which a lower portion facing the index ring 53 projects outwardly by forming a flange portion 632 on the tip side. In the flange portion 632 of the inner ring 63, a number of groove portions corresponding to the protrusion portions of the index ring 53 are formed at positions corresponding to the protrusion portions.
- a coil spring 54 as a biasing means for biasing the inner ring 63 and thus the entire wing 6 upward is inserted into the rotating shaft 62 of the wing 6. Be placed.
- the inner ring 63 and the index ring are centered on the rotating shaft 62 of the wing 6 while applying a force for pressing the inner ring 63 in the direction of the index ring 53 against the spring force of the coil spring 54.
- the protrusion 53 (not shown) of the index ring 53 is inserted into a groove (not shown) of the inner ring 63 when the ring 53 is relatively rotated, the index ring 53 on the bowl 5 side and the inner ring on the wing 6 side are inserted.
- the ring 63 is engaged, whereby the bowl 5 and the blade portion 6 can rotate integrally around the rotation axis A as the rotation center.
- the configuration in which the bowl 5 and the wing 6 can be integrally rotated by engaging the index ring 53 and the inner ring 63 with the protrusion and the groove is illustrated, but is not limited thereto. It is not a thing. For example, by pressing the inner ring 63 against the index ring 53 by the coil spring 54, the bowl 5 and the wing 6 can be rotated integrally as a result of frictional resistance.
- the angular positions of the projection portion and the groove portion around the respective rotation axes are set at unequal intervals.
- the positional relationship does not always return to the position when it is integrally rotated.
- high-speed rotation for example, a slight imbalance caused by a manufacturing error may cause vibration, and stable high-speed rotation may not be performed. Therefore, for example, by performing a test or the like to grasp in advance the phase at which the vibration becomes the smallest, and by performing positioning at this phase every time when rotating together, positioning considering dynamic balance can be realized. it can.
- the alignment mechanism may be configured to be able to position the relative position of the wing 6 and the bowl 5 around the rotation axis only at one place where the dynamic balance is the best.
- the inner peripheral surface 510ST of the tapered portion 510 of the bowl 5 in the present embodiment there are a plurality of locations in the circumferential direction (here, three locations as examples) from the inner peripheral surface 510ST.
- a protruding portion 510N that protrudes is provided.
- the plurality of protrusions 510N to be arranged are arranged at an equal angular interval (for example, an interval of 120 degrees here) as viewed from above (see FIG. 4). ).
- the protrusion 510N is a needle (bar-shaped member) that protrudes vertically upward from the inner peripheral surface 510ST of the tapered portion 510 of the bowl 5.
- the upper end of the protrusion 510N is pointed conically, and the base end is fixed to the inner peripheral surface 510ST of the taper 510 with screws.
- the wing 6 and the bowl 5 When the wing 6 and the bowl 5 rotate relative to each other with the vertical axis A as the center of rotation, the wing 6 and the bowl 5 correspond to the protrusions 510N below the blades 621 to 623 (621L to 623L shown in FIG. 3). Notches 621C to 623C are formed so as not to collide with the protrusion 510N. Further, blades 621B to 623B are provided at the lower ends of the blade portions 621 to 623, respectively.
- the protrusions are provided at three locations, but the present invention is not limited to this, and the number of protrusions 510N can be adjusted as appropriate according to the inner diameter of the bowl 5.
- the number of blade portions of the wing 6 is three and the number of protrusions 510N is three. As a result, the separated solid in the bowl 5 is conveyed to the opening 510a.
- the number of blade portions of the wing 6 and the number of protrusions 510N are not necessarily the same.
- the shaft member 610 of the wing 6 is provided with a plurality of nozzles 615 for cleaning the blade surfaces of the blade portions 621 to 623 and the inner surface of the bowl 5.
- the illustration of the nozzle 615 is omitted in FIGS. 3 and 4.
- These nozzles 615 supply the cleaning liquid supplied from the cleaning liquid supply pipe 80 and pass through the internal space in the shaft member 610 in the horizontal direction, that is, the outer side in the rotational radial direction of each of the blade portions 621 to 623, or in the vertical direction, that is, High-pressure jets upward / downward.
- each nozzle 615 has a flat jet outlet and is jetted in such a manner that the supplied cleaning liquid is spread in a flat shape.
- a number of nozzles that inject in the lateral direction are arranged on the shaft member 610 of the wing body 61 at a predetermined interval (for example, six nozzles per one blade portion). Further, it is preferable that the nozzles ejected in the lateral direction are arranged at intervals such that the ejected cleaning liquids slightly overlap each other.
- nozzles that inject in the vertical direction are arranged on the shaft member 610 of the wing body 61 one by one (for example, two for one blade portion) toward the upper side and the lower side of the wing.
- the nozzles ejected in the vertical direction are arranged at positions where the ejection direction of the liquid to be processed does not interfere with the ejection directions of the respective cleaning liquids of the nozzles ejected in the vertical direction.
- nozzles that inject in the horizontal direction and nozzles that inject in the vertical direction are provided on the shaft member 610, one for each wing. That is, in this embodiment, since it is a structure provided with 3 blade
- the kind and number of nozzles provided in the wing 6 are not particularly limited, and can be appropriately changed according to the ejection direction (spreading angle) of the cleaning liquid in each nozzle, the wing size, and the like. Further, it is not always necessary to provide both the nozzles for jetting in the horizontal direction and the nozzles for jetting in the vertical direction, and only one of them can be provided in the wing 6.
- an actuator (not shown) is driven so that the brake 243 is ON, that is, contacts the rotating shaft 52 of the bowl 5.
- the bowl 5 is fixed to the support member 244 and the casing 4.
- the wing drive motor 73 By driving the wing drive motor 73 from the fixed state of the bowl 5, the wing 6 as a whole rotates.
- the protruding portion of the index ring 53 is inserted into the groove portion of the inner ring 63 in the alignment mechanism described above, and the inner ring 63 and the index ring 53 are engaged at a predetermined position, so that the wing 6 and the bowl 5
- the position (phase) around the axis is set to a positional relationship enabling high-speed rotation in consideration of the dynamic balance.
- the entire wing 6 is raised to the first height position by the biasing force of the coil spring 54, and the tip of the drive shaft of the wing drive motor 73 is driven. And the upper end of the rotating shaft 62 of the wing 6 are released.
- the tapered portion 511 of the bowl 5 and the tapered portions 621T to 623T of the blade portions of the wing 6 may be contacted and engaged to fix the wing 6 and the bowl 5 so that they can rotate integrally. Good.
- the taper portion 511 of the bowl 5 and the taper portions 621T to 623T of the blade portions of the wing 6 are configured to be able to abut and engage with each other, so that the groove portion of the inner ring 63 and the protrusion portion of the index ring 53 are engaged.
- the wing 6 and the bowl 5 can be integrally rotated more stably than the simple structure.
- the main body driving motor 71 is driven from this state, and the liquid to be treated is supplied from the supply pipe 42 into the bowl 5 after a predetermined rotational speed is achieved.
- the wing 6 and the bowl 5 are integrally rotated at a high speed (for example, clockwise when viewed from above), and the solid-liquid separation operation of the supplied liquid to be processed is started.
- the bowl 5 and the wing 6 are collectively referred to as a “rotating cylindrical body”.
- the rotational cylindrical body has a rotational speed and centrifugal force of about 10,000 rpm / 20000 G (20,000 G).
- the phase of the bowl 5 and the wing 6 takes into consideration the dynamic balance.
- the centrifugal separator 1 of the present embodiment As the rotational speed of the rotating cylindrical body becomes higher, the rotational motion is stabilized by the so-called gyro effect, which occurs at the time of centrifugal separation while having a cantilever support structure. It is possible to suppress the vibration that occurs. Furthermore, according to the centrifugal separator 1 of the present embodiment, the diameter of the bowl is larger than that of a conventional centrifugal separator having a double-supported structure in which vibration generated during centrifugation is absorbed by both the upper and lower bearings. Can be made relatively large in diameter.
- the centrifugal separator 1 when the liquid to be treated is centrifuged, the separated light liquid is discharged from the uppermost light liquid discharge section 25 by the action of a very large centrifugal force, and the heavy liquid is discharged below the heavy liquid.
- the solid matter (cake) discharged from the portion 43 and further separated is accumulated in the rotating cylindrical body.
- the wing driving motor 73 is lowered by the cylinder 241 from the above-described stopped state of the rotating cylinder (the wing 6 is in the first height position), and the driving shaft of the wing driving motor 73 and the rotating shaft 62 of the wing 6 are used. Are coupled with each other.
- the wing drive motor 73 is further lowered by the cylinder 241, whereby the wing 6 is lowered to the second height position, and the engagement state between the groove portion of the inner ring 63 and the protrusion portion of the index ring 53 is established. Canceled.
- the wing 6 can be rotated relative to the bowl 5 by moving the wing 6 to the second height position lower than the first height position.
- the bowl is moved by moving the wing 6 to the first height position by a drive mechanism including a cylinder 241, a wing drive motor 73, an inner ring 63, an index ring 53, a coil spring 54, and the like.
- the wing 6 is rotated relative to the bowl 5 in a predetermined rotation direction by rotating the wing 6 and the wing 6 together and moving the wing 6 to a second height position lower than the first height position. At least one of the wing 6 and the bowl 5 can be rotated so as to rotate.
- the brake 243 is turned on by an actuator (not shown) so that the rotating shaft 52 of the bowl 5 is fixed to the support member 244 and the casing 4.
- the wing drive motor 73 by driving the wing drive motor 73 from the state in which the bowl 5 is fixed so as not to rotate, only the wing 6 rotates in a predetermined direction (counterclockwise direction as viewed from above).
- the separated solid matter accumulated in the bowl 5 is scraped by the blade portions 621 to 623 of the wing 6 and discharged from the hole portion 510a of the bowl 5 to the outside of the bowl.
- the discharged solid matter further falls to the outside from the lower side of the casing 4 from which the lid 41 is removed.
- the solid matter generated during the centrifugal separation process and accumulated in the bowl 5 can be automatically discharged without removing the bowl 5 from the casing 4. .
- the separated solid matter (cake) accumulated in the bowl 5 has a high viscosity and an excessive load applied to the wing drive motor 73 or an annular separated solid matter deposited along the inner peripheral surface of the bowl 5 is present.
- the solid material slides with respect to the inner surface of the bowl 5, and it is difficult to transport the separated solid matter to the hole 510a only by rotating the wing 6.
- the wing is placed in the bowl 5 in order to make the wing 6 rotatable relative to the bowl 5 in order to discharge the separated solid matter from the bowl 5.
- the separated solid is pushed downward by the lower end of the descending wing, and the separated solid is stuck into the needle tip of the protrusion 510N. Therefore, when the wing is rotated in a predetermined rotation direction (counterclockwise direction as viewed from above) after the wing 6 is lowered to the second height position, the separated solid matter has a state in which the protruding portion 510N has bitten. Therefore, the separated solid does not slide in the bowl 5 and rotate together with the wing 6. As a result, the rotating wing 6 conveys the separated solid matter that is caught by the protrusion 510N against the inner surface of the bowl 5 by the blade portions 621 to 623, and the separated solid matter deposited in an annular shape. Is torn off by the rotation of the wing 6 and is easily transported to the hole 510a.
- the discharge of the separated solid matter from the bowl 5 can be promoted by spraying the cleaning liquid from the spray nozzle 615 before or during the rotation of the wing 6.
- the washing liquid may be similarly ejected to promote the discharge of the separated solid matter.
- the above-described operation of the centrifugal separator 1 can automatically discharge a relatively solid separated solid from the bowl 5, so that the time, cost, etc. required for the subsequent cleaning of the bowl 5 are performed. Is greatly reduced. Specifically, it is not necessary to remove the bowl 5 from the casing 4, and even when the bowl 5 is removed from the casing 4 depending on the type of liquid to be treated, maintenance, etc., and the bowl 5 is further washed. Time and cost to completion are greatly reduced. Therefore, for example, the time and cost until the completion of cleaning when food or chemicals are handled as the liquid to be treated are significantly reduced as compared with the conventional centrifugal separator.
- the bowl 5 and the wing 6 are integrally rotated during the centrifugal separation operation (clockwise rotation direction when viewed from above), and the bowl is discharged when the separated solids are discharged from the bowl 5. 5 is stopped and only the wing 6 is rotated in a predetermined direction (counterclockwise as viewed from above), but is not necessarily limited thereto.
- the rotation direction in which the bowl 5 and the wing 6 are integrally rotated during the centrifugal separation operation may not necessarily be clockwise when viewed from above, but may be configured to rotate counterclockwise when viewed from above.
- the configuration is not limited to the configuration in which only the wing 6 is rotated while the bowl 5 is stopped. It is also possible to rotate only the bowl 5 with the wings 5 stopped so that the relative rotation direction becomes a predetermined direction.
- a drive mechanism that rotates both the bowl 5 and the wing 6 is adopted so that the relative rotation direction of the wing 6 with respect to the bowl 5 is a predetermined direction when the separated solid matter is discharged after the centrifugal separation operation.
- the second embodiment of the present invention is a modification of the above-described first embodiment.
- parts having the same functions as those already described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
- the notches 621C to 623C for avoiding interference with the protrusions are formed in the lower portions 621L to 623L of the plurality of blade portions 621 to 623 constituting the wing 6,
- each blade is divided into an upper wing and a lower wing, and the lower wing can be attached to and detached from the lower end of the upper wing (FIG. 5).
- the wing 6 ′ in the present embodiment has only a first inclination angle ⁇ 1 (see FIG. 6) in a predetermined rotational direction (here, a counterclockwise direction as viewed from above) with respect to the vertical direction.
- An upper wing 6U ′ having blade portions 621U ′ to 623U ′ having inclined blade surfaces, and a predetermined rotational direction side (here viewed from above) which is located below these upper wings 6U ′ and is perpendicular to the vertical direction.
- notches 621C 'to 623C' are formed at portions corresponding to the protrusions of the blade portions 621L 'to 623L'.
- an optimum inclination angle or the like can be selected according to the characteristics such as the viscosity, shape, and particle size of the solid contained in the liquid to be treated.
- a lower wing having a blade shape can be selected.
- the difficulty in discharging the separated solid matter arises in the diameter-reducing portion near the inner peripheral surface 510ST of the taper portion 510, and the upper wing 6U ′ needs to be replaced according to the properties of the separated solid matter. Is low. Therefore, if only the lower wing is selected and replaced in accordance with the characteristics of the liquid to be treated, it is possible to improve the discharge performance of the separated solid matter without performing a major operation such as removing the upper wing. .
- the lower wing 6L ' includes three blade portions 621L' to 623L '
- the upper wing 6U' also includes three blade portions 621U 'to 623U'. At least a part of the lower ends of each of the plurality of blade portions 621U ′ to 623U ′ constituting the upper wing 6U ′ and at least a part of the upper ends of each of the plurality of blade portions 621L ′ to 623L ′ constituting the lower wing 6L ′ And the angular position in the rotation direction coincides (see position X in FIG. 7).
- the lower end of the upper wing 6U ′ and the upper end of the lower wing 6L ′ are configured so that the angular positions in the rotational direction at least partially coincide with each other, so that the upper portion is at least in the coincident portion.
- the separated solid that moves from the wing side to the lower wing side is not caught by the upper end of the lower wing, and as a result, the conveyance resistance when discharging the solid separated can be reduced.
- the inclination angle of the blade surfaces of the blade portions 621U ′ to 623U ′ constituting the upper wing 6U ′ with respect to the vertical direction is set to the first inclination angle ⁇ 1 ( 6), the inclination angle of the blade surfaces 621L ′ to 623L ′ constituting the lower wing 6L ′ with respect to the vertical direction is higher than the first inclination angle ⁇ 1 in the counterclockwise direction when viewed from above.
- the second inclination angle ⁇ 2 is large (see FIG. 6).
- the blade surface in the vicinity of the portion where the notches 621C ′ to 623C ′ are formed has a predetermined rotational direction (as viewed from above) with respect to the rotational radius direction of the wing 6. It is tilted counterclockwise.
- the taper surface at the bottom of the bowl has a shape with a decreasing radius toward the opening. Therefore, there is a possibility that the separated solid in the bowl does not fall smoothly toward the discharge port.
- the wing 6 'rotates relative to the bowl 5 in a predetermined direction the separated solids in the bowl are separated from the bowl by the blade surface near the portion where the wing notch is formed. Therefore, the separated solid can be efficiently guided toward the opening at the bottom of the bowl (FIG. 8).
- the blade surface of each wing is inclined counterclockwise when viewed from above with respect to the vertical direction, and at least a part of the blade surface near the portion where the notch of each wing is formed is formed. It is inclined counterclockwise when viewed from above with respect to the rotational radius direction, but this is not necessarily limited to this, and the blade surface of each wing is clockwise when viewed from above with respect to the vertical direction.
- the blade surface near the part where the cutout of each wing is formed may be inclined to the clockwise direction side when viewed from above with respect to the rotational radius direction.
- the wing is relatively rotated in the clockwise direction when viewed from above.
- a plate-like member that protrudes from the inner peripheral surface 510ST of the tapered portion 510 of the bowl 5 is employed as the protrusion 510N ′.
- the plate-like protrusion 510N ' is also screwed to the inner peripheral surface 510ST of the tapered portion 510 of the bowl 5 as in the first embodiment.
- a blade is formed on the upper portion of the protrusion 510N '.
- the blade formed on the plate-like member provided in the protrusion 510N ′ has an inclined surface that descends from the upstream side to the downstream side in a predetermined rotation direction (counterclockwise direction seen from above) (FIG. 7).
- the blade formed on the plate-like member provided in the protrusion 510N ′ gradually moves from the outer side in the rotational radius direction of the bowl toward the rotation center side (from the right side to the left side in FIG. 9). Inclined to descend.
- the notch area provided on the wing side can be reduced as much as possible, and the strength to withstand the centrifugal force generated when the wing is rotated at high speed can be ensured.
- a plate provided on the protrusion 510N ′ on the lower surface of the separated solid (cake) that is pushed down as the wing is lowered. Since the blade formed on the shaped member hits at an angle, the blade can easily cut the separated solid material (see FIGS. 9 and 10).
- notches 621 UB ′ to 623 UB ′ are formed at the outer ends in the rotational radius direction of the blade portions 621 U ′ to 623 U ′ of the upper wing 6 U ′.
- the load applied to the wing drive motor 73 when the wing 6 'is rotated can be reduced.
- the wings 6 ′ formed with the notches 621UB ′ to 623UB ′ as described above can stir the separated solids deposited in a ring while being crushed. As a result, the separated solids into the holes 510a can be stirred. The conveyance efficiency can be improved.
- the third embodiment of the present invention is a modification of the above-described embodiments.
- portions having the same functions as those already described in the above embodiments are given the same reference numerals, and description thereof is omitted.
- the protrusions are provided on the inner peripheral surface 510ST so as not to slide with respect to the inner peripheral surface 510ST of the separated solid separated in the bowl and deposited in an annular shape on the inner peripheral surface of the bowl.
- the protruding portions 51 ⁇ / b> B are also arranged on the cylindrical surface above the inner peripheral surface 510 ⁇ / b> ST in the tapered portion 510 of the bowl 5.
- the protrusion 51B is arranged near the center of the bowl 5 in the height direction, but the present invention is not limited to this, and the characteristics of the separated solid contained in the liquid to be treated, the wing Needless to say, it can be appropriately arranged according to various factors such as the shape of the blades, the friction coefficient of the inner surface of the bowl 5, the inclination angle of the inner peripheral surface 510ST of the tapered portion 510, the size of the hole portion 510a, and the like. . Further, here, the protrusion 510N and the protrusion 51B provided on the inner peripheral surface 510ST of the taper part 510 employ different protrusions, but the present invention is not limited to this, and the protrusions of the same shape are used. It can also be adopted.
- the fourth embodiment of the present invention is a modification of the above-described embodiments.
- portions having the same functions as those already described in the above embodiments are given the same reference numerals, and description thereof is omitted.
- separation is performed in order to avoid a situation in which the separated solid matter deposited in a ring shape in the bowl after centrifugation rotates integrally with the wing and is not easily discharged from the hole at the bottom of the bowl.
- Various projections are provided so that solids do not slide on the inner surface 510ST of the inner surface of the bowl, but the present invention is not necessarily limited thereto.
- a plurality of grooves 510G extending radially from the hole 510a are formed on the inner peripheral surface 510ST of the tapered portion 510 of the bowl.
- these grooves do not necessarily have to be formed on the inner peripheral surface 510ST of the tapered portion 510, and can be formed on the inner surface of the bowl other than the inner peripheral surface 510ST, for example.
- the grooves formed as means for giving slip resistance to the inner surface of the bowl do not necessarily have to be formed radially around the rotation axis, for example, substantially parallel to the movement trajectory of the separated solid material actually conveyed by the wing. It can also be a spiral trajectory extending in the direction.
- an opening that rotates around the vertical axis and functions as a supply port for the liquid to be processed and also functions as a discharge port for the separated solid material that is centrifuged from the liquid to be processed.
- a slip resistance imparting means provided at the center of the lower portion and having a taper portion in which the radius of the inner peripheral surface decreases toward the opening as it goes downward, and imparts a slip resistance to the separated solid matter at least on the inner peripheral surface of the taper portion
- a bowl provided with A wing that rotates about the vertical axis in the bowl and that conveys separated solids in the bowl toward the opening when rotating relative to the bowl in a predetermined rotation direction; The bowl and the wing are rotated together by moving the wing to the first height position, and the wing is moved to a second height position lower than the first height position. Accordingly, it is possible to provide a centrifugal separation device including a drive mechanism that rotates at least one of the wing and the bowl so that the wing rotates relative to the
- the configuration shown in each of the above-described embodiments is not necessarily limited to the configuration shown, and for example, the configuration shown in each of the above-described embodiments can be arbitrarily combined. Yes. That is, for example, the groove 510G shown in the fourth embodiment may be adopted in the first to third embodiments, or the protrusion 51B shown in the third embodiment and Corresponding notches may be employed in the first, second and fourth embodiments.
- the configuration shown in each of the above embodiments is merely an example.
- the present invention can be used as long as it has substantially the same functions as those of the essential components constituting the centrifugal separator according to the present invention and the functions thereof are the same. It can be considered that it comprises the essential components of the centrifuge according to.
- the configuration is substantially the same as that of the centrifugal separator according to the present invention. It can be regarded as having a configuration requirement.
Landscapes
- Centrifugal Separators (AREA)
Abstract
Description
まず、本発明の第1の実施の形態について説明する。
図1は、第1の実施の形態による遠心分離装置の構成を説明する概略図である。遠心分離装置1は、遠心分離処理の対象である被処理液を遠心分離し、液体と固形物に分離する。また、本実施の形態による遠心分離装置は、被処理液に比重の異なる複数種類の液体が含まれている場合には、比重の軽い軽液と比重の重い重液と、固形物の3つに分離することも可能となっている。
ケーシング4の上部は、支持部材244の下部に着脱可能に接続されている。すなわち、支持部材244の下部は、ケーシング4の上部を覆うための蓋としても機能している。また、この支持部材244には、被処理液の遠心分離時に分離発生される軽液を排出するための軽液排出部25が、ボウル5の内部空間の上部と連通するように設けられる。
なお、ここでは一例として3箇所に突起部が設けられているが、これに限られるものではなく、突起部510Nの設置個数はボウル5の内径に応じて適宜調整可能である。また本実施の形態では、ウイング6の羽根部の枚数が3枚であり、突起部510Nの個数も3つとなっているが、結果としてボウル5内部の分離固形物を開口部510aへと搬送することができればよく、ウイング6の羽根部の枚数と突起部510Nの個数とは必ずしも同じである必要はない。
以下、遠心分離装置1の各動作を説明する。
まず、被処理液を遠心分離する際の遠心分離装置1の基本動作について説明する。図1に示す状態では、コイルばね54の付勢力によりウイング6全体が相対的に上方に位置しており、ボウル5とウイング6とが一体的に回転可能な係合状態にある。この状態から、シリンダ241によりウイング駆動用モータ73を下方に移動させることで、ウイング駆動用モータ73の駆動軸の先端とウイング6の回転軸62の上端とが上述のカプラ構造によってカップリング結合される。かかる動作により、インデックスリング53と係合状態にあったインナーリング63は、ウイング駆動用モータ73の下降動作に伴ってインデックスリング53に対して相対的に降下する。これにより、インナーリング63とインデックスリング53との係合が解除され、ウイング6はボウル5に対して相対的に回転動作可能となる。
続いて、本発明の第2の実施の形態について説明する。本発明の第2の実施の形態は、上述した第1の実施の形態の変形例である。以下、すでに第1の実施の形態において述べた部分と同一の機能を有する箇所には同一符号を付し、説明は省略する。
続いて、本発明の第3の実施の形態について説明する。本発明の第3の実施の形態は、上述した各実施の形態の変形例である。以下、すでに上記各実施の形態において述べた部分と同一の機能を有する箇所には同一符号を付し、説明は省略する。
続いて、本発明の第4の実施の形態について説明する。本発明の第4の実施の形態は、上述した各実施の形態の変形例である。以下、すでに上記各実施の形態において述べた部分と同一の機能を有する箇所には同一符号を付し、説明は省略する。
前記ボウル内で前記垂直軸を中心として回転するとともに、前記ボウルに対して所定の回転方向に相対回転する際に前記ボウル内の分離固形物を前記開口へ向けて搬送するウイングと、
前記ウイングを第1の高さ位置へと移動させることにより前記ボウルと前記ウイングとを一体的に回転させ、前記ウイングを前記第1の高さ位置よりも低い第2の高さ位置へと移動させることにより前記ウイングが前記ボウルに対して所定の回転方向に相対回転するように前記ウイングおよび前記ボウルの少なくともいずれかを回転させる駆動機構と、を備える遠心分離装置を提供することができる。
2 フレーム
244 支持部材
241 シリンダ
243 ブレーキ
3 遠心分離装置本体
4 ケーシング
5 ボウル
510 テーパ部
52 回転軸
53 インデックスリング
54 コイルばね
510N 突起部
51B 突起部
510G 溝
6,6’、6”、6z ウイング
63 インナーリング
610 軸部材
621~623 羽根部
621C~623C 切り欠き
621Cz~623Cz 切り欠き
6U’ 上部ウイング
6L’ 下部ウイング
71 本体駆動用モータ
73 ウイング駆動用モータ
Claims (11)
- 垂直軸を中心として回転し、被処理液の供給口として機能するとともに前記被処理液から遠心分離される分離固形物の排出口として機能する開口が下部中央に設けられ、下方に向かうにつれて内周面の半径が前記開口へ向けて減少するテーパ部を有するボウルと、
前記ボウルの前記テーパ部の内周面上の周方向における複数箇所に設けられ、前記内周面から突出する突起部と、
前記ボウル内で前記垂直軸を中心として回転するとともに、前記ボウルに対して所定の回転方向に相対回転する際に前記ボウル内の分離固形物を前記開口へ向けて搬送するウイングと、
前記ウイングを第1の高さ位置へと移動させることにより前記ボウルと前記ウイングとを一体的に回転させ、前記ウイングを前記第1の高さ位置よりも低い第2の高さ位置へと移動させることにより前記ウイングが前記ボウルに対して所定の回転方向に相対回転するように前記ウイングおよび前記ボウルの少なくともいずれかを回転させる駆動機構と、を備え、
前記ウイングの前記突起部に対応する部位は、前記ウイングと前記ボウルとが相対回転する際に前記突起部と衝突しない形状に切り欠かれていることを特徴とする遠心分離装置。 - 前記ウイングは、垂直方向に対して前記所定の回転方向側に第1の傾斜角度だけ傾斜している羽根面を有する上部ウイングと、前記上部ウイングよりも下方に位置し垂直方向に対して前記所定の回転方向側に第1の傾斜角度よりも大きい第2の傾斜角度だけ傾斜している羽根面を有する下部ウイングと、を備え、
前記下部ウイングの前記突起部に対応する部位に切り欠きが形成されていることを特徴とする請求項1に記載の遠心分離装置。 - 前記下部ウイングは、前記上部ウイングに対して着脱可能であることを特徴とする請求項2に記載の遠心分離装置。
- 前記下部ウイングと前記上部ウイングは、それぞれが同じ枚数の羽根を有し、
前記上部ウイングを構成する複数の羽根それぞれの下端の少なくとも一部と、前記下部ウイングを構成する複数の羽根それぞれの上端の少なくとも一部とは、回転方向における位置が一致していることを特徴とする請求項2に記載の遠心分離装置。 - 前記ウイングの切り欠かれている部位近傍の羽根面は、回転半径方向に対して前記所定の回転方向側に傾斜していることを特徴とする請求項1に記載の遠心分離装置。
- 前記突起部は、前記ボウルの前記テーパ部の内周面から突出する板状部材を含むことを特徴とする請求項1に記載の遠心分離装置。
- 前記板状部材の上部には刃が形成されていることを特徴とする請求項6に記載の遠心分離装置。
- 前記板状部材に形成されている前記刃は、前記所定の回転方向における上流側から下流側へ向けて下降する傾斜面となっていることを特徴とする請求項7に記載の遠心分離装置。
- 前記板状部材に形成されている前記刃は、前記ボウルの回転半径方向外側から回転中心側に向かうにつれて徐々に下降するように傾斜していることを特徴とする請求項7に記載の遠心分離装置。
- 前記突起部は、前記ボウルの前記テーパ部の内周面から突出する棒状部材を含むことを特徴とする請求項1に記載の遠心分離装置。
- 前記棒状部材は、前記ボウルの前記テーパ部の内周面から垂直上方に延びるニードルであることを特徴とする請求項10に記載の遠心分離装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP13886921.9A EP3009193A4 (en) | 2013-06-14 | 2013-06-14 | Centrifuge |
PCT/JP2013/003738 WO2014199420A1 (ja) | 2013-06-14 | 2013-06-14 | 遠心分離装置 |
US14/892,351 US20160107173A1 (en) | 2013-06-14 | 2013-06-14 | Centrifuge |
JP2015522264A JP6040311B2 (ja) | 2013-06-14 | 2013-06-14 | 遠心分離装置 |
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PCT/JP2013/003738 WO2014199420A1 (ja) | 2013-06-14 | 2013-06-14 | 遠心分離装置 |
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US (1) | US20160107173A1 (ja) |
EP (1) | EP3009193A4 (ja) |
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WO (1) | WO2014199420A1 (ja) |
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JP6023369B1 (ja) * | 2016-02-22 | 2016-11-09 | 巴工業株式会社 | 遠心分離装置 |
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CN110000011B (zh) * | 2019-04-08 | 2021-03-09 | 宁波锋成纳米科技有限公司 | 一种固液分离用离心设备 |
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- 2013-06-14 JP JP2015522264A patent/JP6040311B2/ja not_active Expired - Fee Related
- 2013-06-14 EP EP13886921.9A patent/EP3009193A4/en not_active Withdrawn
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US20160107173A1 (en) | 2016-04-21 |
EP3009193A1 (en) | 2016-04-20 |
JP6040311B2 (ja) | 2016-12-07 |
EP3009193A4 (en) | 2017-02-22 |
JPWO2014199420A1 (ja) | 2017-02-23 |
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