KR101917579B1 - Centrifugal concentrating dehydrator with excellent water content reduction of dehydrated cake - Google Patents

Abstract

The present invention relates to a centrifugal concentration and dehydration device with excellent water content reduction of a dehydrated cake. The present invention comprises: a bowl which has a cylindrical inner space formed inside thereof and a separation liquid outlet and a cake outlet formed at both ends thereof in order to discharge a separated liquid and a dehydrated cake separated from sludge; a sludge inlet pipe which is inserted into one end of the bowl to inject sludge; a screw which is rotatably installed in the bowl, is provided with a screw wing in the longitudinal direction, rotates by receiving a rotational force transmitted from the outside, and separates the sludge in the inner space into the separated liquid and the dehydrated cake to be discharged to the separation liquid outlet and the cake outlet, respectively; and a water content adjusting unit which is installed in the bowl to be movable along the longitudinal direction of the screw while facing an end of the screw, adjusts a gap of a passage of the sludge formed between the end of the screw and the unit, and adjusts the water content of the dehydrated cake. According to the present invention, it is possible to adjust the water content of the dehydrated cake by adjusting the passage gap of the sludge such that the water content of the dehydrated cake can be flexibly operated, thereby maximizing the water content reduction efficiency of the dehydrated cake. Further, it is possible to increase the treatment efficiency of the sludge by promoting the separation of wastewater and solids from the sludge, and to increase the discharge efficiency of the wastewater, thereby reducing the rise of the hydraulic pressure and preventing the degradation of bearing life, excessive power, and increase of noise.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a centrifugal concentrating dehydrator,

The present invention relates to a centrifugal concentrator and dehydrator, and more particularly, to a centrifugal concentrator and a dehydrator capable of reducing a water content by controlling a water content of a dehydrated cake.

Generally, the sludge generated from a treatment process such as sewage, manure, industrial wastewater, and livestock wastewater is supplied to a centrifugal dehydrator or a thickener through a sludge inlet pipe, and is separated into wastewater and solid matter.

The centrifugal separating and dehydrator used for removing the wastewater from the sludge by dewatering or concentration of the sludge is such that a screw provided with a screw blade around the rotating shaft is rotatably installed in a hollow tube.

As a technique related to a conventional centrifugal separating and dehydrator, Korean Patent Laid-Open No. 10-2018-0033835, entitled "Inclined Screw Conveyor ", has been proposed, which has a cylindrical space formed on the inside thereof, A bowl having an inner diameter reducing part formed on one side thereof and having an inner diameter reduced toward the cake outlet side; And a first tapered portion having a reduced outer diameter corresponding to the inner diameter reduction portion is formed at one side of the hub, and a hub for supplying sludge supplied from the outside to the space is rotatably installed in the space, A second tapered portion formed to have a reduced outer diameter from the first tapered portion toward the end side is formed so that the clearance between the second tapered portion and the inner surface of the bowl increases toward the tip of the bowl, And a screw for separating the sludge in the space into a separating liquid and a dewatering cake by rotation, and discharging the separated liquid to the cake outlet and the separation liquid outlet, respectively.

In this conventional technology, the hub of the screw is formed to be tapered, thereby reducing the clogging of foreign materials such as hair, and securing the water level for the separated liquid of the sludge is sufficient to reduce the water pressure rise, thereby reducing the moisture content of the dewatered cake, However, since the moisture content of the dehydrated cake can not be adjusted as needed, the moisture content of the dehydrated cake can not be flexibly operated.

In order to solve the problems of the prior art as described above, the present invention adjusts the water content of the dewatered cake by adjusting the passage gap of the sludge, thereby flexibly operating the water content of the dewatered cake, It can maximize the efficiency and improve the treatment efficiency of sludge by promoting the separation of wastewater and solids from the sludge. By increasing the discharge efficiency of wastewater, it can reduce the rise of hydraulic pressure and prevent the bearing life, power surge and noise increase. .

Other objects of the present invention will become readily apparent from the following description of the embodiments.

According to an aspect of the present invention, there is provided an apparatus for separating sludge, comprising: a cylindrical inner space formed on an inner side thereof; a separation liquid outlet for discharging the separation liquid separated from the sludge and a dewatering cake, ; A sludge inlet pipe inserted to inject sludge into one end of the bowl; The sludge in the inner space is separated into a separating liquid and a dewatering cake by being rotated by receiving a rotational force transmitted from the outside by providing a screw blade along the longitudinal direction so as to be rotatable in the bowl, A screw to be respectively discharged to an outlet; And adjusting the water gap of the dewatering cake by adjusting the passage gap of the sludge formed between the end of the screw and the end of the screw so as to be movable along the longitudinal direction of the screw so as to be opposed to the end of the screw And a moisture content adjusting unit for adjusting the moisture content of the dehydrated cake.

The bowl is provided with a vortex guide for guiding the separated liquid discharged from each of the separated liquid outlets to be discharged in the form of a swirl by the centrifugal force due to the rotating force of the screw, May be provided for each separation liquid discharge port.

Wherein the moisture content adjusting unit comprises: a ring body which is provided so as to be in surface contact with the inner circumferential surface of the bowl and movable along the longitudinal direction of the screw; A pressure ring provided at one end of the ring body so as to face an end of the screw and having a ring shape to allow the dehydrated cake to pass therethrough; An extension hole formed along the circumference of the ring body to correspond to each of the cake outlet ports formed along the edge of the bowl in the ring body, the extension hole extending along the movement direction; And a plurality of ring gears which are inserted in parallel to the moving direction of the ring body so as to be arranged along a plurality of end edges of the bowl and are respectively screwed to the other ends of the ring body, And an adjusting bolt for varying the position of the ring body with respect to the moving direction by rotation.

The pressing ring may be inclined to the ring body so as to correspond to an end portion formed to be inclined with respect to the moving direction in the screw.

The pressing ring may be formed perpendicular to the ring body so as to correspond to an end portion of the screw which is formed to be perpendicular to the moving direction.

Further comprising a separation promoting unit installed in the hollow portion of the screw and separating and promoting the sludge introduced into the hollow portion from the sludge inlet pipe by the separation liquid and the dehydration cake, A plurality of discs arranged side by side and having a first opening formed at the center thereof; A plurality of first wings provided along the edge of the original plate and connecting the original plates to each other, the first wings having a width direction coinciding with a radial direction of the original plate; A plurality of second wings extending in a longitudinal direction from an outer side edge of the disk, the second wings having a width direction coinciding with a direction parallel to a tangent of the disk; And a chamber connected to the second vane and provided in the longitudinal direction, wherein a second opening is formed so as to face the first opening, and a third opening is formed so as to coincide with a sludge supply port formed in the screw; .

According to the centrifugal separating and concentrating dehydrator of the present invention, which is excellent in reducing the water content of the dehydrated cake, the moisture content of the dehydrated cake can be controlled by controlling the passage clearance of the sludge, so that the dehydrated cake moisture content can be flexibly operated, It is possible to maximize the efficiency of reducing the water content of the sludge and to improve the treatment efficiency of the sludge by promoting the separation of the wastewater and solid matter from the sludge and to improve the discharge efficiency of the wastewater, It is possible to prevent overload and noise increase.

FIG. 1 is a perspective view showing a centrifugal separating and dehydrating dehydrator excellent in water content reduction of a dewatering cake according to an embodiment of the present invention. FIG.
FIG. 2 is a perspective view of a centrifugal separating and concentrating dehydrator according to an embodiment of the present invention, which is excellent in reducing the water content of a dewatering cake in another direction.
FIG. 3 is a cross-sectional view illustrating a centrifugal separating and dehydrating dehydrator superior in water content reduction of a dewatering cake according to an embodiment of the present invention.
FIG. 4 is a perspective view illustrating a front ball head in a centrifugal separating and dehydrating dehydrator excellent in water content reduction of a dewatering cake according to an embodiment of the present invention. FIG.
5 is a perspective view showing a water content adjusting unit in a centrifugal separating and dewatering machine having an excellent dewatering cake reducing water content according to an embodiment of the present invention.
FIG. 6 is a perspective view illustrating a separation promoting unit in a centrifugal separating and dehydrator having a reduced water content of a dewatering cake according to an embodiment of the present invention. FIG.
FIG. 7 is a cross-sectional view illustrating the essential part of a centrifugal separating and dehydrating machine having a water-reducing effect of a dewatering cake according to another embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in detail in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention, And the scope of the present invention is not limited to the following examples.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant explanations thereof will be omitted.

FIG. 1 is a perspective view showing a centrifugal separating and dehydrator having a water content reduction of a dehydrated cake according to an embodiment of the present invention. FIG. 2 is a perspective view of a centrifugal separating and dehydrating dehydrator according to an embodiment of the present invention, FIG. 3 is a cross-sectional view illustrating a centrifugal separating and concentrating dehydrator having a reduced water content in a dewatering cake according to an embodiment of the present invention. Referring to FIG.

1 to 3, a centrifugal separating and dehydrator 100 having a reduced moisture content of a dewatering cake according to an embodiment of the present invention includes a bowl 110, a sludge inlet pipe 120, a screw 130, And a moisture content regulation unit 140.

The bowl 110 has a cylindrical inner space 117 formed therein and a separation liquid outlet 114 and a cake outlet 115 for discharging the separated liquid and the dewatered cake separated from the sludge at both ends are formed. The ball 110 can have, for example, a cylindrical shape as a single member, and as another example as in the present embodiment, the front and rear ball heads 111 and 112 are provided at both ends with a hollow structure by a plurality of fixing bolts 113 Or may have an assembling structure that is detachably installed.

1, 3, and 4, the ball 110 may have a plurality of separation liquid outlets 114 formed at one end, for example, along the circumference of the center of the front ball head 111, A vortex guide 115 for guiding the separated liquid discharged from each of the separation liquid discharge ports 114 to be discharged in the form of a spiral due to the centrifugal force by the rotational force of the screw 130 may be provided for each separation liquid discharge port 114. The vortex guide 115 can guide the separation liquid discharged from the separation liquid discharge port 114 by contact, collision or by providing a path so as to be discharged in a tangential direction with respect to rotation of the screw 130. That is, the vortex guide 115 is a guide for guiding the discharged liquid discharged from the separation liquid discharge port 114 into contact with or colliding with the tangential direction or the inclined guide surface Alternatively, as another example, a discharge passage may be formed in the tangential direction to guide the discharge liquid discharged from the separation liquid discharge port 114 to be discharged in the tangential direction. Thus, the separation liquid can be discharged regularly and smoothly in the form of a spiral from the ball 110 in a regular and smooth manner, so that water is injected into the internal components, such as bearings for installation of the sludge inlet pipe 120, And it is also possible to prevent excessive power and noise which would otherwise occur when the separated liquid is discharged irregularly. In addition, the bowl 110 may have a cake outlet 116 along the periphery of the other end.

The sludge inlet pipe 120 is inserted into one end of the ball 110 such as the front ball head 111 so as to inject the sludge into the hollow portion 132 of the screw 130, May be configured to be supplied to the inner space 117 of the ball 110.

The screw 130 is rotatably installed in the bowl 110 and is provided with a screw blade 134 along the longitudinal direction to receive a rotational force transmitted from the outside and rotate to rotate the screw 110 in the internal space 117 of the bowl 110 The sludge is separated into a separation liquid and a dehydrating cake to be discharged to the separation liquid discharge port 114 and the cake discharge port 116, respectively.

The screw 130 is installed such that a screw shaft 131 extending from one end of the screw 130 is received outside through the other end of the ball 110 such as the rear ball head 112 to receive the rotational force of the motor from the outside, 131 are rotatably supported in a state sealed by bearings and sealing members provided on the rear ball head 112 and sludge supplied to the inner hollow portion 132 through the sludge inlet pipe 120 is supplied to the outside At least one sludge supply port 133 may be formed to supply the sludge to the inner space 117 of the corresponding bowl 110. In addition, the screw 130 may be formed as a tapered portion 135 whose diameter gradually increases toward one end of the screw 130, thereby increasing the concentration efficiency of the sludge passing therethrough.

The water content regulation unit 140 is installed in the bowl 110 so as to be movable along the longitudinal direction of the screw 130 in opposition to the end 136 of the screw 130, Thereby adjusting the water content of the dewatered cake.

The water content regulation unit 140 includes a ring body 141 that is in contact with the inner peripheral surface of the bowl 110 and is movable along the longitudinal direction of the screw 130, A pressurizing ring 142 provided to face the end of the bowl 130 and having a ring shape to allow the dewatering cake to pass therethrough and a cake outlet 116 formed along the circumference of the end of the bowl 110 in the ring body 141 An extension hole 144 formed to extend along the circumference of the ring body 141 to correspond to the direction of movement of the water content control unit 140 and an extension hole 144 formed to extend along the end edge of the bowl 110, Are inserted in parallel to the moving direction of the ring body 141 so as to be arranged in plural numbers along the edge of the ball head 112 and screwed to the other ends of the ring body 141, By rotation, It may include an adjusting bolt 145 to vary the position of the ring body 141 with respect to the moving direction of the group.

The ring body 141 and the presser ring 142 are both formed in a ring shape so that a through hole 143 for passing the dewatering cake is formed at the center portion. The end portion 136 of the screw 130 and the presser ring The dewatered cake introduced through the passage between the extension hole 144 and the cake outlet 116 is moved to the inside of the ring body 141 through the through hole 143 to be discharged outward through the extension hole 144 and the cake outlet 116. At this time, the extension hole 144 is formed so as to extend along the moving direction of the moisture content control unit 140, so that the state of being connected to the cake outlet 116 can be maintained despite the movement of the moisture content control unit 140 . The adjustment bolt 145 may be fixed using a member such as a snap ring, a nut, or a bearing to allow rotation while suppressing movement to the end edge of the ball 110, for example, the edge of the rear ball head 112, And may be fixed by a groove structure formed in the head 112 such that it is laterally inserted so as to be inhibited from being moved back and forth and exposed or protruded back and forth. In addition, the head 112 can be rotatably coupled .

When the passage gap between the pressurizing ring 142 and the end portion 136 of the screw 130 is maximized by the adjusting bolt 145, the water content of the discharged dewatering cake may be 80 3% by weight, Can follow Table 1 below.

division The passage clearance (mm) between the pressure ring 142 and the end 136 of the screw 130, Water content of dehydrated cake (wt%) at least 10 70 maximum 32 78

The pressing ring 142 may be formed to be inclined to the ring body 141 so as to correspond to the end portion 136 formed to be inclined with respect to the moving direction in the screw 130 as in the present embodiment. Therefore, the length of the movement path of the dewatering cake between the end portion 136 of the screw 130 and the presser ring 142 is relatively increased, so that the dewatering action can be more consistently performed, and the dispersion of the power required for concentration of the dewatering cake . ≪ / RTI >

Referring to FIGS. 3 and 6, the separation promoting unit 150 may be installed in the hollow portion 132 of the screw 130. The separation promoting unit 150 separates and accelerates the sludge introduced into the hollow portion 132 from the sludge inlet pipe 120 by the separation liquid and the dehydration cake. That is, the separation promoting unit 150 is directly or indirectly connected to the sludge inlet pipe 120 or installed adjacent to the sludge inlet pipe 120 to receive sludge from the sludge inlet pipe 120. At this time, And a polymer or a chemical for helping the separation of the cake. The solid material facilitates the agglomeration of the dewatering cake, and the separation liquid can be easily separated from the sludge.

The separation promoting unit 150 may include a circular plate 151 provided in parallel to the hollow portion 132 so as to be parallel to the hollow portion 132 and having a first opening 152 formed in the central portion thereof, A first wing 153 whose width direction coincides with the radial direction of the disk 151 and a second wing 153 which extends from the outer circumferential edge of the disk 151 to the screw 130 A plurality of second wings 154 that extend in the longitudinal direction of the first wing 154 and coincide in the width direction with the tangent of the disk 151 and a second wing 154 that is connected to the second wing 154, A second opening 156 is formed so as to face the first opening 152 and a chamber 155 in which a third opening 157 is formed to coincide with a sludge supply port 133 formed in the screw 130 . Therefore, the sludge collides with the first and second vanes 153 and 154 while sequentially passing through the first to third openings 152, 156 and 157 of the disk 151, thereby assisting the action of the polymer or chemical in the sludge, This promotes the separation of the sludge into separate liquid and dehydrated cake. The sludge having passed through the first and second wings 153 and 154 is supplied to the inside of the chamber 155 through the second opening 156 and flows through the third opening 157 and the sludge supply port 133, And is supplied to the inner space 117. The separation promoting unit 150 also supplies the sludge to the internal space 117 of the boiler 110 through the third opening 157 to bear wear instead of the sludge supply port 133, The replacement of the screw 130 can be prevented, and the use period of the screw 130 can be remarkably increased.

FIG. 7 is a cross-sectional view illustrating the essential part of a centrifugal separating and dehydrating machine having a water-reducing effect of a dewatering cake according to another embodiment of the present invention.

Referring to FIG. 7, in the centrifugal separating and dehydrator having excellent water content reduction of the dewatering cake according to another embodiment of the present invention, the pressurizing ring 242 is vertically movable in the direction of the water content controlling unit 240 in the screw 230 And may be formed perpendicular to the ring body 241 so as to correspond to the end portion 236 formed to be formed. Thus, as in the previous embodiment, it is possible to adjust the water content of the dewatered cake by adjusting the gap of the passage formed between the end portion 236 of the screw 230 and the pressure ring 242 by the adjustment bolt 245 And the presser ring 242 is formed in a ring shape together with the ring body 241 so that the through hole 243 is formed. Further, the length of the dewatering cake transfer passage between the end portion 236 of the screw 230 and the presser ring 242 is made relatively short, so that the dewatering action can be performed more quickly.

According to the centrifugal separating and dewatering machine of the present invention, the water content of the dewatering cake can be controlled by controlling the passage gap of the sludge, so that the water content of the dewatering cake can be flexibly operated, It is possible to maximize the water reducing efficiency of the dehydrated cake.

According to the present invention, the treatment efficiency of the sludge can be improved by promoting the separation of wastewater and solids from the sludge, and the increase of the hydraulic pressure can be reduced by increasing the discharge efficiency of the wastewater, and the bearing life is shortened, Can be prevented.

Although the present invention has been described with reference to the accompanying drawings, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

110: Bowl 111: Front ball head
112: rear ball head 113: fixing bolt
114: Separate liquid outlet 115: Vortex guide
116: cake outlet 117: inner space
120: sludge inlet pipe 130,230: screw
131: screw shaft 132: hollow part
133: sludge supply port 134: screw blade
135: tapered portion 136, 236: end
140, 240: water content adjusting unit 141, 241:
142, 242: pressure ring 143, 243: through hole
144: extension hole 145, 455: adjusting bolt
150: separation promotion unit 151: original plate
152: first opening 153: first wing
154: second wing 155: chamber
156: second opening 157: third opening

Claims (6)

A bowl having a cylindrical inner space formed inside thereof, a separation liquid outlet for discharging the separation liquid separated from the sludge and a dewatering cake, and a cake outlet;
A sludge inlet pipe inserted to inject sludge into one end of the bowl;
The sludge in the inner space is separated into a separating liquid and a dewatering cake by rotating a rotating force transmitted from the outside by providing a screw blade along the longitudinal direction so as to be rotatable in the bowl, A screw to be respectively discharged to an outlet;
The water gap of the dewatering cake is adjusted by adjusting the passage gap of the sludge formed between the end of the screw and the end of the screw so as to be movable along the longitudinal direction of the screw so as to be opposed to the end of the screw A water content regulation unit;
A separation promoting unit installed in the hollow part of the screw and separating and promoting the sludge charged into the hollow part from the sludge charging pipe into a separating liquid and a dehydrating cake;
/ RTI >
Wherein the separation promotion unit comprises:
A plurality of first and second openings formed in parallel to one another in the hollow portion so as to be perpendicular to each other;
A plurality of first wings provided along the edge of the original plate and connecting the original plates to each other, the first wings having a width direction coinciding with a radial direction of the original plate;
A plurality of second wings extending in a longitudinal direction from an outer side edge of the disk, the second wings having a width direction coinciding with a direction parallel to a tangent of the disk; And
A chamber connected to the second wing and installed in the longitudinal direction, a second opening formed to face the first opening, and a third opening formed to coincide with a sludge supply port formed in the screw;
Wherein the dehydrated cake has a water content lower than that of the dehydrated cake. The method according to claim 1,
The above-
And a vortex guide for guiding the separated liquid discharged from each of the separate liquid discharging outlets to be discharged in the form of a swirl by the centrifugal force due to the rotating force of the screw, A centrifugal concentrator and dehydrator installed at each outlet, which is excellent in reducing the water content of the dehydrated cake. The method according to claim 1,
The water content regulation unit comprises:
A ring body disposed in surface contact with an inner circumferential surface of the bowl and movable along a longitudinal direction of the screw;
A pressure ring provided at one end of the ring body so as to face an end of the screw and having a ring shape to allow the dehydrated cake to pass therethrough;
An extension hole formed along the circumference of the ring body to correspond to each of the cake outlet ports formed along the edge of the bowl in the ring body, the extension hole extending along the movement direction; And
The ring body being inserted in parallel to the moving direction of the ring body so as to be arranged along a plurality of end edges of the bowl and screwed to the other end of the ring body, An adjusting bolt for varying a position of the ring body with respect to the moving direction;
Wherein the dehydrated cake has a water content lower than that of the dehydrated cake. The method of claim 3,
The pressurizing ring may include:
Wherein the dewatering cake is formed slantingly on the ring body so as to correspond to an end portion formed to be inclined with respect to the moving direction of the screw. The method of claim 3,
The pressurizing ring may include:
And is perpendicular to the ring body so as to correspond to an end portion of the screw perpendicularly formed with respect to the moving direction, wherein the moisture content of the dewatering cake is excellent. delete

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