WO2015107989A1 - Dispositif de déshydratation centrifuge - Google Patents

Dispositif de déshydratation centrifuge Download PDF

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Publication number
WO2015107989A1
WO2015107989A1 PCT/JP2015/050479 JP2015050479W WO2015107989A1 WO 2015107989 A1 WO2015107989 A1 WO 2015107989A1 JP 2015050479 W JP2015050479 W JP 2015050479W WO 2015107989 A1 WO2015107989 A1 WO 2015107989A1
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WO
WIPO (PCT)
Prior art keywords
bowl
cake
centrifugal
hydrated material
discharge
Prior art date
Application number
PCT/JP2015/050479
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English (en)
Japanese (ja)
Inventor
敬太 赤羽
裕彦 貝田
吉田　祐一
江草　知通
Original Assignee
三菱重工環境・化学エンジニアリング株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 三菱重工環境・化学エンジニアリング株式会社 filed Critical 三菱重工環境・化学エンジニアリング株式会社
Priority to KR1020167015273A priority Critical patent/KR20160082249A/ko
Priority to CN201580002999.6A priority patent/CN105813759A/zh
Priority to KR1020177037708A priority patent/KR102037588B1/ko
Publication of WO2015107989A1 publication Critical patent/WO2015107989A1/fr

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    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • 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
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B2001/2091—Configuration of solids outlets

Definitions

  • the present invention relates to a centrifugal dehydration apparatus that separates solids and liquids using centrifugal force as means for dehydrating hydrated substances such as various sludges.
  • centrifugal dehydrator that separates solid and liquid using centrifugal force
  • centrifugal force is applied by rotation of the outer barrel bowl to perform solid-liquid separation, and heavy components containing solid and liquid components by the inner barrel screw
  • Centrifugal dewatering devices that transport and discharge dehydrated cake in the machine are known.
  • dehydration of a dehydrated cake or the like is promoted by the self-weight pressurization by the centrifugal force and the squeezing force of the discharge resistance simultaneously with the solid-liquid separation.
  • the discharge resistance is increased by reducing the flow passage area of the discharge port. That is, by making the discharge port narrow, a compacting action is given to the dewatered cake discharged from the discharge port (see, for example, Patent Document 1).
  • the centrifugal dewatering device described in Patent Document 1 describes a structure that automatically adjusts the width of the discharge port according to the discharge pressure of the dewatered cake.
  • This structure has an adjustment ring that can change the width of the discharge port and a spring that supports the adjustment ring. For example, the moisture content of the dewatered cake is adjusted by changing the spring constant of the spring. Yes.
  • this structure has a problem that the discharge pressure of the dehydrated cake is not sufficiently transmitted.
  • An object of the present invention is to provide a centrifugal dehydrator having a discharge structure in which fibers and crystals contained in a hydrated product are difficult to adhere while maintaining sufficient discharge resistance with respect to the hydrated product discharged from the centrifugal dehydrator.
  • the centrifugal dewatering device includes a cylindrical outer shell bowl to which a hydrated product is supplied, and a blade member that protrudes from the peripheral surface of the rotating drum housed in the outer shell bowl.
  • a valve body provided such that the width in the axial direction of the drainage passage of the water-containing material formed can be adjusted.
  • the fibers or crystals attached to the discharge passage can be removed by moving the valve body that can adjust the width of the discharge passage. it can. That is, the discharge passage is narrowed due to adhesion, and the discharge pressure rises so that the valve body moves to widen the discharge passage, and the adhering material is removed to prevent clogging when discharging the water-containing material. be able to.
  • discharge resistance can be provided to the water-containing material by narrowing the width of the discharge passage.
  • the moisture content of the hydrated material can be adjusted by adjusting the width of the discharge passage.
  • the valve body may have a configuration in which an elastic force is applied in a direction to reduce the width.
  • variety of a discharge passage increases by the press force accompanying the fall of the moisture content of a hydrated product, and the residence time of a hydrated product becomes short.
  • the reduction of the pressing force accompanying the increase in the moisture content of the hydrated product reduces the width of the discharge passage, and the retention time of the hydrated product becomes longer.
  • the residence time according to the moisture content of the hydrated product and the fluctuation of the moisture content of the hydrated product can be minimized.
  • the water content of the hydrous material can be adjusted by adjusting the initial length of the spring (the spring state at the time of assembly can be arbitrarily selected from the natural length or the compression side) and the spring constant. The rate can be adjusted.
  • the centrifugal dehydrator may include an actuator that moves the valve body in a direction in which the width is increased or decreased according to the pressure of the hydrated material.
  • the width of the discharge passage is increased in accordance with the increase in the pressing force accompanying the decrease in the moisture content of the moisture content, thereby shortening the residence time of the moisture content, and the pressing force associated with the increase in the moisture content of the moisture content.
  • the width of the discharge passage can be reduced to increase the residence time of the hydrated material. Thereby, it becomes the residence time according to the moisture content of the hydrated product, and the fluctuation of the moisture content of the hydrated product can be minimized.
  • a valve seat surface provided in the outer body bowl and in surface contact with the valve body may be formed in a truncated cone shape that increases in diameter toward the propelling direction of the hydrated material. Since the discharge passage formed by the valve seat surface and the valve body has a shape that faces radially outward along the direction in which the centrifugal force is applied, the discharge of the water-containing material becomes smoother.
  • the centrifugal dewatering device is provided with a blade member protruding from a peripheral surface of a cylindrical outer shell bowl to which a hydrated product is supplied and a rotating drum inserted through the outer shell bowl.
  • An inner body screw for propelling the hydrated material in the axial direction, a rotating body that dehydrates using the centrifugal force while conveying the hydrated material, and inclined with respect to the propelling direction of the hydrated material A plurality of guide vanes arranged and spaced from each other toward the downstream, and a water content that is provided at one end of the outer body bowl in the propulsion direction and discharges the water-containing material squeezed by the plurality of guide vanes And an object discharge hole.
  • the hydrated material can be given a squeezing force by colliding with the guide blades in the process of being promoted by the hydrated material and generating discharge resistance. Moreover, since the squeezed hydrated matter is discharged through the hydrated matter discharge hole in the forward direction of the guide blade, blockage when the hydrated matter is discharged can be prevented. In addition, the moisture content of the hydrated material can be adjusted by changing the arrangement angle of the guide vanes.
  • the outer body bowl has a cylindrical straight body part and a truncated cone-shaped taper part, and the plurality of guide blades are provided so as to protrude to the inner peripheral side from the taper part. It is good. According to the said structure, squeezing force can be provided to a hydrated material with the discharge resistance by the guide blade provided in the taper part.
  • sufficient discharge resistance can be imparted to the water-containing material discharged from the centrifugal dehydrator. Moreover, it can be set as the discharge
  • FIG. 1 is a vertical sectional view showing a centrifugal dehydration apparatus 1.
  • the centrifugal dewatering device 1 is a so-called straight body type, and includes a rotating body 2 having a hollow interior, a feed pipe 3 inserted into the inside from the supply side end of the rotating body 2, and a rotating body. And a pair of support units 5 provided at both ends in the longitudinal direction of the rotating body 2, and a drive unit 6 that rotationally drives the rotating body 2.
  • the rotating body 2 separates a hydrated material such as sludge supplied to the inside into a dehydrated cake and a separation liquid by dehydrating using a centrifugal force while being conveyed.
  • the rotating body 2 includes a hollow cylindrical outer shell bowl 8 and an inner drum screw 22 that is housed in the outer shell bowl 8 and propels water-containing material in the axial direction.
  • the centrifugal dewatering device 1 performs solid-liquid separation on the hydrated material introduced from the left side of FIG. 1 via the feed pipe 3, and the dehydrated cake is on the first end side of the outer body bowl 8, and the hydrated material is propelled in the propulsion direction. It discharges from the front side.
  • the first end side of the outer shell bowl 8, the front side in the propelling direction of the hydrated material is called the discharge side, and the second end side opposite to the first end side is called the supply side.
  • the central axis O of the rotating body 2 is referred to as the central axis O
  • the longitudinal direction of the rotating body 2 is referred to as the axial direction.
  • the outer shell bowl 8 includes a bowl main body 9 that is a hollow cylindrical casing, and a hollow outer drum rotation shaft 10 that protrudes from both longitudinal ends of the bowl main body 9 to both sides. .
  • a separation liquid discharge hole 11 for discharging the separation liquid separated from the hydrated material is provided at the supply side end of the bowl body 9.
  • a cake discharge hole 12 for discharging the dehydrated cake separated from the hydrated material is provided at the discharge side end of the bowl body 9.
  • the protrusion 13 includes a reduced diameter surface 14 having a truncated cone shape whose cross-sectional shape viewed from the circumferential direction narrows the inner diameter of the bowl body 9 from the supply side toward the discharge side, and the supply side And a diameter-enlarged surface 15 (valve seat surface) having a truncated cone shape that widens the inner diameter of the bowl body 9 from the discharge side toward the discharge side.
  • the shape of the protrusion 13 viewed from the circumferential direction has a triangular shape with one side coinciding with the inner peripheral surface of the bowl body 9.
  • the outer shell bowl 8 is supported by the support unit 5 so as to be rotatable around the shaft from below with the outer drum rotating shaft 10 disposed so as to extend in the horizontal direction. . Thereby, the bowl main body 9 is held at a predetermined height position from the installation surface F.
  • the inner cylinder screw 22 conveys the hydrated material inside the outer cylinder bowl 8 to the discharge side while stirring.
  • the inner drum screw 22 has a substantially cylindrical rotary drum 23 in which a slightly large-diameter feed zone 24 is formed in the central portion in the longitudinal direction, and protrudes in the radial direction from the peripheral surface of the rotary drum 23 and extends spirally in the axial direction. And a blade member 25.
  • a feed hole 26 communicating with the outer shell bowl 8 is formed through the feed zone 24 of the rotary drum 23.
  • the inner cylinder screw 22 is accommodated in the outer cylinder bowl 8, and the inner cylinder rotation shaft 16 formed so as to protrude from both axial ends of the rotation cylinder 23 is provided inside the outer cylinder rotation shaft 10 of the outer cylinder bowl 8. Are inserted respectively.
  • the inner cylinder rotating shaft 16 on the supply side has a hollow structure.
  • the pitch in the axial direction of the blade member 25 can be arbitrarily changed.
  • the pitch can be a constant pitch or a gradually decreasing pitch
  • the back pressure valve 17 is attached to an end wall 19 on the discharge side of the bowl body 9 via a plurality of compression coil springs 18.
  • the back pressure valve 17 is connected to the end wall 19 via the compression coil spring 18.
  • the back pressure valve 17 is not fixed to the bowl body 9 or the rotating drum 23.
  • the back pressure valve 17 has a disk shape having a through hole 20 in the center, and an inner body screw 22 is inserted through the through hole 20.
  • the back pressure valve 17 has an outer diameter that is slightly smaller than the inner diameter of the bowl body 9.
  • an inclined surface 21 whose diameter increases from the supply side toward the discharge side is formed at the outer peripheral edge of the back pressure valve 17.
  • the angle of the inclined surface 21 is equal to the angle of the enlarged diameter surface 15 of the protrusion 13 of the bowl body 9. That is, the inclined surface 21 of the back pressure valve 17 is formed so that the inclined surface 21 and the enlarged diameter surface 15 are in surface contact with each other by moving the back pressure valve 17 to the supply side.
  • the enlarged diameter surface 15 functions as a valve seat surface of the back pressure valve 17 which is a valve body.
  • a cake discharge passage 27 that squeezes the dehydrated cake toward the cake discharge hole 12 is formed between the enlarged diameter surface 15 of the bowl body 9 and the inclined surface 21 of the back pressure valve 17. Since the back pressure valve 17 is attached to the bowl body 9 via the compression coil spring 18, the gap G 1 between the enlarged diameter surface 15 and the inclined surface 21 changes depending on the pressure applied to the back pressure valve 17. Fluctuates depending on the height. That is, the back pressure valve 17 is given an elastic force in a direction to reduce the width of the cake discharge passage 27. In other words, the width of the cake discharge passage 27 (cross-sectional area perpendicular to the axial direction of the cake discharge passage 27) varies according to the pressure of the dehydrated cake applied to the back pressure valve 17.
  • the back pressure valve 17 functions as a valve body capable of adjusting the axial width of the cake discharge passage 27.
  • the member connecting the back pressure valve 17 and the end wall 19 is not limited to the compression coil spring 18, as long as an elastic force can be applied to the back pressure valve 17 in the direction of reducing the width of the cake discharge passage 27.
  • a material having elasticity such as a leaf spring or an elastomer may be used.
  • the feed pipe 3 is a pipe that supplies water-containing material to the rotating body 2.
  • the feed pipe 3 is a hollow pipe member that is open at both ends.
  • the feed pipe 3 is inserted into the inner cylinder rotating shaft 16 of the inner cylinder screw 22 from the supply side end of the rotating body 2, and the first end of the feed pipe 3. Reaches the feed zone 24 of the rotary drum 23.
  • the second end opposite to the first end of the feed pipe 3 protruding from the supply-side end of the rotating body 2 is supported by the support unit 5.
  • the casing 4 accommodates the outer body bowl 8 and collects the dehydrated cake and the separated liquid discharged from the outer body bowl 8.
  • the casing 4 is a hollow casing, and a separation liquid chute 28 for discharging the separation liquid recovered from the outer shell bowl 8 to the outside is provided at the supply side end.
  • a cake chute 29 for discharging the dewatered cake collected from the outer bowl 8 is provided at the discharge side end of the casing 4.
  • the support unit 5 is a unit that rotatably supports the rotating body 2 at both ends in the longitudinal direction (axial direction).
  • the support unit 5 includes a supply-side support unit 30 that supports the supply-side end portion of the rotator 2 and a discharge-side support unit 31 that supports the discharge-side end portion of the rotator 2.
  • the drive unit 6 is a unit that rotationally drives the outer body bowl 8 and the inner body screw 22 constituting the rotating body 2 at different speeds.
  • the drive unit 6 includes a motor 32 as a drive source, a belt transmission mechanism 33 that transmits the rotational driving force of the motor 32 to the outer body bowl 8, and a hydraulic differential speed device 34 that rotationally drives the inner body screw 22. And have.
  • the operation of the motor 32 is controlled by a control device (not shown).
  • the straight body type centrifugal dewatering device 1 configured as described above, when the outer body bowl 8 and the inner body screw 22 are rotationally driven by the drive unit 6 at different rotational speeds, water content such as sludge is fed. It is supplied to the feed zone 24 of the rotary drum through the pipe 3. Then, the hydrated material moves from the feed zone 24 to the outer shell bowl 8 through the supply hole 26 by receiving a centrifugal force. Thereafter, the hydrated product is separated from the separated water and dehydrated by the centrifugal effect while being transported from the supply side to the discharge side by the blade member 25 of the inner barrel screw 22 due to the differential speed between the outer barrel bowl 8 and the inner barrel screw 22. Separated into cakes. Then, the separation water is discharged from the separation liquid chute 28 to the outside of the apparatus through the separation liquid discharge hole 11.
  • the dewatering cake is subjected to a pressing force (back pressure) due to the discharge resistance in the axial direction by the back pressure valve 17 in the process of being conveyed and discharged.
  • back pressure back pressure
  • resistance is imparted to the dewatered cake conveyed from the supply side to the discharge side by the blade member 25 of the inner body screw 22 by hitting the back pressure valve 17 and pressing the back pressure valve 17.
  • the pressing force of the dewatered cake due to the propulsive force of the inner barrel screw 22 increases.
  • the compression coil spring 18 that supports the back pressure valve 17 is contracted, and the height of the compression coil spring 18 is lowered to form the cake discharge passage 27. That is, the cake discharge passage 27 as shown in FIG. 2 is formed from the state where the back pressure valve 17 as shown in FIG. 3 is closed and the enlarged diameter surface 15 and the inclined surface 21 are in surface contact.
  • the dehydrated cake is discharged from the cake chute 29 to the outside of the apparatus through the cake discharge passage 27 through the cake discharge passage 12.
  • the spring constant and the number of the compression coil springs 18 will be described.
  • the spring constant and the number of the compression coil springs 18 are determined based on the specifications of the centrifugal dehydrator 1. For example, when the processing amount per hour of the centrifugal dehydrator 1 is 50 m 3 , it is determined based on the pressing force of the dewatering cake during the processing of the water content of this processing amount, that is, at the rated operation. Specifically, during rated operation, the distance G1 between the enlarged diameter surface 15 and the inclined surface 21 is about 1/3 of the distance G2 between the inner peripheral surface of the bowl body 9 and the outer peripheral surface of the rotating drum 23 (hereinafter referred to as a standard interval). The number of spring constants and the number are selected.
  • the spring constant and the number of the compression coil springs 18 balance the overall elastic force of the plurality of compression coil springs 18 and the pressing force of the dehydrated cake during rated operation in a state where the cake discharge passage 27 is at a standard interval.
  • the pressing force of the dehydrated cake when the moisture content of the dehydrated cake further decreases, the pressing force of the dehydrated cake further increases, the interval G1 becomes larger than the standard interval, and the area of the cake discharge passage 27 increases.
  • the area of the cake discharge passage 27 By increasing the area of the cake discharge passage 27, more dehydrated cake is discharged, and the residence time of the dehydrated cake is shortened. Thereby, it returns from the state where the moisture content of a dewatering cake is low.
  • the pressing force of the dehydrated cake decreases, the interval G1 becomes smaller than the standard interval, and the area of the cake discharge passage 27 decreases.
  • the discharge amount of the dehydrated cake is also reduced, and the residence time of the dehydrated cake is lengthened. Thereby, it returns from the state where the moisture content of the dehydrated cake is high. That is, the residence time according to the moisture content of the dehydrated cake becomes a minimum, and the fluctuation of the moisture content of the dehydrated cake is minimized.
  • the hydrated material contains fibers or crystals
  • the fibers or crystals may adhere to the cake discharge passage 27.
  • the area of the cake discharge passage 27 is temporarily reduced, the discharge resistance is increased, the internal pressure is increased, and the force for pressing the back pressure valve 17 is increased.
  • the back pressure valve 17 retracts toward the discharge side in accordance with the magnitude of the increased force, and the area of the cake discharge passage 27 increases. That is, the width G1 of the cake discharge passage 27 is widened because the gap G1 between the enlarged diameter surface 15 and the slope 21 is larger than the standard gap. Thereby, the fiber part and crystal
  • the area of the cake discharge passage 27 returns to the standard interval by the elastic force of the compression coil spring 18.
  • the back pressure valve 17 that determines the width of the cake discharge passage 27 moves so as to widen the cake discharge passage 27. Fibers and crystals adhering to the discharge passage 27 can be removed. That is, when the cake discharge passage 27 is narrowed due to adhesion and the discharge pressure is increased, the back pressure valve 17 is moved to widen the cake discharge passage 27 and the adhering material is removed, thereby discharging the dehydrated cake. Can be prevented.
  • an increase in the pressing force accompanying a decrease in the moisture content of the dehydrated cake increases the area of the cake discharge passage 27 and shortens the residence time of the dehydrated cake.
  • the area of the cake discharge passage 27 decreases due to a decrease in the pressing force accompanying an increase in the moisture content of the dehydrated cake, and the residence time of the dehydrated cake becomes longer. Thereby, it becomes the residence time according to the moisture content of the dehydrated cake, and the fluctuation of the moisture content of the dehydrated cake can be minimized.
  • the moisture content of the dewatered cake can be adjusted by adjusting the spring constant and initial length of the compression coil spring 18 (the spring state during assembly can be arbitrarily selected from the natural length and the compression side). it can.
  • the back pressure valve 17 of the centrifugal dehydrator of the modification of the first embodiment is supported by an actuator 36. That is, the back pressure valve 17 and the end wall 19 of the bowl body 9 are connected by the actuator 36.
  • the actuator 36 is a drive device that can change the axial position of the back pressure valve 17 to an arbitrary position.
  • the actuator 36 can employ a hydraulic cylinder, for example.
  • the back pressure valve 17 is provided with a pressure gauge (not shown) that can detect the pressure of the dewatered cake applied to the back pressure valve 17.
  • the stroke of the actuator 36 is controlled by a control device (not shown) according to the pressure measured by the pressure gauge.
  • the control device stores the pressing force (hereinafter referred to as standard pressure) of the dehydrated cake during rated operation.
  • standard pressure the pressing force of the dehydrated cake during rated operation.
  • the control device determines the position of the back pressure valve 17 so that the gap G1 (width of the cake discharge passage 27) between the enlarged diameter surface 15 and the inclined surface 21 is the standard gap. Adjust.
  • the interval G1 is made narrower than the standard interval.
  • the pressure is larger than the standard interval, the interval G1 is made wider than the standard interval.
  • the residence time of the dehydrated cake depends on the moisture content, and fluctuations in the moisture content of the dehydrated cake are minimized.
  • the interval increases by increasing the pressing force of the dehydrated cake, so that the fibers or crystals attached to the cake discharge passage 27 can be removed. . That is, it is possible to prevent clogging when the dehydrated cake is discharged.
  • the centrifugal dewatering device 1B of this embodiment is a so-called decanter type, and has a shape such as the shape of the outer shell bowl 8 as compared with the straight barrel-type centrifugal dewatering device 1 of the first embodiment.
  • the cake discharge structure is different.
  • the bowl main body 9 of the outer body bowl 8 of the present embodiment has a cylindrical straight body part 40 and a truncated cone-shaped taper part 41.
  • the discharge-side cake discharge hole 42 of the present embodiment is a circular cake discharge hole 42 formed by the discharge-side end portion of the tapered portion 41.
  • the cake discharge hole 42 is slightly smaller than the flow path area of the straight body portion 40 of the bowl body 9.
  • a plurality of guide vanes 43 are provided at equal intervals in the circumferential direction on the tapered portion 41 of the bowl body 9 of the present embodiment.
  • Each guide blade 43 is a plate-shaped member that protrudes radially inward from the inner peripheral surface of the tapered portion 41.
  • the guide blade 43 has a rectangular shape when viewed from the circumferential direction, a blade tip side 44 provided in parallel with the outer peripheral surface of the rotating drum 23, and a first of the blade tip sides 44.
  • the end and the first end of the tapered portion 41 are connected, and the front end side 45 extending along the plane orthogonal to the central axis O and the first end of the blade end side 44 are opposite to each other.
  • the guide vane 43 and the tapered portion 41 are connected via a connection side 47 that connects the outer peripheral end of the front end side 45 of the guide vane 43 and the outer peripheral end of the rear end side 46.
  • the guide blades 43 are formed so as to be as close as possible to the rotary drum 23 as long as the blade edge sides 44 do not contact the rotary drum 23.
  • the guide blades 43 are not arranged on the same plane as the plane including the central axis O, and are formed to be inclined with respect to the propulsion direction of the dewatered cake. That is, the plurality of guide blades 43 are formed such that the dewatered cake hits the guide blades 43 as the dewatered cake conveyed by the blade member 25 of the inner barrel screw 22 moves in the propulsion direction.
  • FIG. 8 is a development view of the truncated cone-shaped tapered portion 41 of the bowl body 9 showing the position of the connecting side 47 of the guide vane 43.
  • reference numeral 41 a is an end of the taper portion 41 on the axial supply side
  • reference numeral 41 b is an end of the taper portion 41 on the axial discharge side.
  • the connecting side 47 of the guide vane 43 is not parallel to the central axis O when viewed from the radial direction, but is inclined with respect to the central axis O when viewed from the radial direction.
  • the distance between the guide blades 43 is formed to be larger than 1/3 of the distance G2 between the inner peripheral surface of the bowl body 9 and the outer peripheral surface of the rotary drum 23 even in the narrowest place. That is, the minimum space dimension of the adjacent guide vanes 43 is larger than 1/3 of the gap G ⁇ b> 2 between the inner peripheral surface of the bowl body 9 and the outer peripheral surface of the rotating drum 23.
  • the dewatered cake collides with the guide blades 43 in the process of being carried out, and the dewatered cake generates a discharge resistance and gives the dewatered cake a pressing force. Can do.
  • the cake discharge hole 42 is slightly smaller than the flow path area of the straight body portion 40 of the bowl body 9, the cake discharge hole 42 is not easily blocked.
  • the moisture content of a dewatering cake can be adjusted by changing the arrangement
  • the fibers or crystals attached to the discharge passage are removed by moving the valve body capable of adjusting the width of the discharge passage. be able to. That is, the discharge passage is narrowed due to adhesion, and the discharge pressure rises so that the valve body moves to widen the discharge passage, and the adhering material is removed to prevent clogging when discharging the water-containing material. be able to.
  • discharge resistance can be provided to the water-containing material by narrowing the width of the discharge passage.
  • the moisture content of the hydrated material can be adjusted by adjusting the width of the discharge passage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Centrifugal Separators (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention porte sur un dispositif de déshydratation centrifuge qui possède : un corps rotatif (2) qui transporte un objet contenant de l'eau et qui utilise une force centrifuge pour la déshydratation, ayant un bol d'enveloppe externe cylindrique (8) dans lequel l'objet contenant de l'eau est disposé et une vis d'enveloppe interne (22) ayant un élément lame (25) disposé de façon à faire saillie sur une surface périphérique d'une enveloppe rotative (23), logée dans le bol de l'enveloppe externe (8), et qui propulse l'objet contenant de l'eau dans la direction axiale ; une vanne (17) disposée de façon à pouvoir ajuster la largeur dans la direction axiale d'un trajet d'évacuation (27) pour l'objet contenant de l'eau, formé à une extrémité, sur le côté avant dans la direction de propulsion du bol de l'enveloppe externe (8).
PCT/JP2015/050479 2014-01-14 2015-01-09 Dispositif de déshydratation centrifuge WO2015107989A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020167015273A KR20160082249A (ko) 2014-01-14 2015-01-09 원심 탈수 장치
CN201580002999.6A CN105813759A (zh) 2014-01-14 2015-01-09 离心式脱水装置
KR1020177037708A KR102037588B1 (ko) 2014-01-14 2015-01-09 원심 탈수 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-004368 2014-01-14
JP2014004368A JP6278307B2 (ja) 2014-01-14 2014-01-14 遠心脱水装置

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WO2015107989A1 true WO2015107989A1 (fr) 2015-07-23

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PCT/JP2015/050479 WO2015107989A1 (fr) 2014-01-14 2015-01-09 Dispositif de déshydratation centrifuge

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JP (1) JP6278307B2 (fr)
KR (2) KR20160082249A (fr)
CN (1) CN105813759A (fr)
TW (1) TWI586435B (fr)
WO (1) WO2015107989A1 (fr)

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SI3658300T1 (sl) * 2017-07-25 2021-04-30 Cesaro Mac Import S.R.L. Obdelovalna naprava odpadnega proizvoda za ločevanje frakcij za recikliranje
JP6349604B1 (ja) * 2017-09-27 2018-07-04 三菱重工環境・化学エンジニアリング株式会社 遠心脱水装置

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JPS4328209Y1 (fr) * 1964-08-19 1968-11-20
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JPS6133250A (ja) * 1984-05-24 1986-02-17 カ−・ハ−・デ−・フムボルト・ウエダ−ク・アクチエンゲゼルシヤフト デカンタ型遠心分離機の遠心力作用域でのスラッジ脱水装置
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KR20180002908A (ko) 2018-01-08
TWI586435B (zh) 2017-06-11
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