KR101926957B1 - Water-Jet Type Centrifuge by Hydraulic Motor - Google Patents

Water-Jet Type Centrifuge by Hydraulic Motor Download PDF

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Publication number
KR101926957B1
KR101926957B1 KR1020170002404A KR20170002404A KR101926957B1 KR 101926957 B1 KR101926957 B1 KR 101926957B1 KR 1020170002404 A KR1020170002404 A KR 1020170002404A KR 20170002404 A KR20170002404 A KR 20170002404A KR 101926957 B1 KR101926957 B1 KR 101926957B1
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South Korea
Prior art keywords
bowl
water
sludge
discharge port
screw conveyor
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KR1020170002404A
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Korean (ko)
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KR20180081315A (en
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이세호
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이세호
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/06—Fluid drive
    • 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
    • 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
    • B04B1/2016—Driving control or mechanisms; Arrangement of transmission gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/10—Control of the drive; Speed regulating
    • 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
    • B04B2001/2083—Configuration of liquid outlets
    • 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

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  • Centrifugal Separators (AREA)

Abstract

The present invention relates to a sludge boiler comprising a bowl having a discharge port through which water discharged from the sludge is discharged from the sludge, and a solids discharge port through which the solids separated from water are discharged from the sludge discharge port. A screw conveyor provided inside the bowl and driven by a hydraulic motor for vehicle speed which adds a rotational force to the rotational force of the main motor to perform squeezing and dewatering of sludge to be injected therein; And a feed pipe passing through the screw conveyor shaft to inject sludge into the screw conveyor, wherein the bowl is formed by combining a cylindrical bowl and a conical bowl, and the cylindrical bowl A balancing groove is formed along the circumferential surface of the coupling end, and a balancer for adjusting the balancing of the bowl is coupled to the balancing groove to freely adjust the balancing point of the waiter and to reduce the rotational load of the bowl. The water-pressure centrifugal dehydrator of the present invention is a water-hydraulic centrifugal dehydrator.
According to the embodiment of the present invention, a balancing groove is formed along the circumferential surface of the bowl, and a balancer for balancing the bowl is combined with the balancing groove, so that the balancing point according to the movement of the waiter is freely adjustable The projecting portion on the surface of the bowl is removed, thereby reducing the rotational load during high-speed rotation of the bowl, thereby reducing energy consumption.

Description

[0001] The present invention relates to a water-jet type centrifugal dehydrator,

The present invention relates to a water-driven hydraulic centrifugal dehydrator, and more particularly, to a water-powered hydraulic centrifugal dehydrator capable of increasing dehydration efficiency and reducing energy.

Generally, a centrifugal dehydrator separates sludge supplied from a treatment process such as industrial wastewater, manure, biological sludge, etc. into water and solid matter using mechanical centrifugal force.

Conventionally, a centrifugal dehydrator includes a bowl rotating at high speed by a main motor and a differential motor connected to a differential motor provided inside the bowl and adding a rotational force to the rotational force of the main motor, A feed pipe for introducing sludge into a chamber in the screw conveyor, and a bowl housing surrounding the outside of the bowl, a water drain port provided at one side, and a solids drain at the other side.

In the centrifugal dehydrator configured as described above, the sludge injected through the feed pipe receives centrifugal force due to centrifugal force at high speed rotation of the bowl, and the solids having a large specific gravity are pushed outward, and the lighter water than the solids are collected and collected in the direction of the center of the bowl, And is conveyed to a rotating screw conveyor 20 and discharged to the outside.

The conventional centrifugal dehydrator has a first type in which the supply of sludge is supplied in the cylindrical bowl direction from the conical bowl position and a second type in which the supply of the sludge is provided in the conical bowl direction at the position of the cylindrical bowl, In recent years, the second type, which is supplied in the direction of the conical bowl from the position of the cylindrical bowl, is preferred because the sludge supply pipe is short and stably sprayed and the filtration area is long to increase the dewatering efficiency.

However, in the case of the second embodiment, the dewatering efficiency is better than that of the first embodiment. However, since the total driving load is large and the energy consumption is large, there is a need to improve the structure capable of reducing energy consumption.

In addition, the sludge introduced into the centrifugal dehydrator usually has a concentration variation ranging from 1 to 4%. That is, when the concentration of the sludge is high, the percentage of the solid matter is high, and when the concentration of the sludge is low, the percentage of the solid matter is low.

However, in the conventional centrifugal dehydrator, the motor for rotating the bowl and the screw is composed of an electric motor. Since such an electric motor is rotated at a constant rotation speed (rpm) irrespective of the concentration of the sludge, The response force of the sludge to the sludge is not immediately responsive to the rotational force of the sludge conveying device, so that the dewatering efficiency is low and the solid matter is not smoothly discharged.

In addition, since the main motor and the differential motor are concentrated in one place on one side of the bowl, load imbalance occurs. Because of this load imbalance can cause noise during the rotation of the bowl, conventionally, the outer surface of the bowl has been padded with weight to adjust the balance of the bowl.

However, the conventional weighing device has a structure in which the outer surface of the bowl is welded or drilled to assemble it, so that once the position is determined, the position can not be changed and the balance can not be adjusted freely. In addition, there is a problem in that the nonwoven cloth attached to the outer surface of the bowl protrudes from the outer surface of the bowl, thereby increasing the rotational load during high-speed rotation of the bowl.

In addition, a weir part for collecting the water separated from the solids is provided on one side of the bowl, and a discharge port for discharging the collected water is provided in the weir part. In the conventional ware part, Since the water is collected at the right angle with the bowl, there is a problem that the collected water is not smoothly discharged. In the case where the discharged water is not saturated, the water is stagnated and the driving load is increased during the rotation of the bowl. .

In addition, when the water stagnates in a saturated state, a vortex phenomenon occurs due to a perpendicular cross section of the discharge port during high-speed rotation, and the driving load is increased during the rotation of the bowl by scattering while scattering.

In addition, the other side of the bowl is provided with a solids discharge port through which solids separated from the water are discharged. When the solids are discharged in a high-speed rotation state of the bowl, resistance is generated at the discharge port surface opposite to the rotating direction of the bowl, There is a problem that the end face of the outlet is severely worn.

(Patent Document 1) Korean Patent No. 10-1008516 (January 14, 2011)

(Patent Document 2) Korean Patent No. 10-1586448 (Jan. 18, 2016)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems,

SUMMARY OF THE INVENTION It is an object of the present invention to provide a balancing groove along a circumferential surface of a bowl and a balancing groove to adjust the balancing of the bowl, The present invention also provides a water-driven hydraulic centrifugal dehydrator which can reduce energy by reducing the amount of rotation load during high-speed rotation of the bowl as the weight protruding from the bowl surface is removed.

Another object of the present invention is to provide a method and apparatus for controlling the speed of a screw conveyor using a differential motor for rotating a screw conveyor as a hydraulic motor and controlling the hydraulic pressure according to the concentration of the sludge to be supplied, And to provide a propellant hydraulic centrifugal dehydrator.

It is another object of the present invention to provide a method of manufacturing an apparatus for collecting water and discharging it to a discharge port by fabricating a streamlined or tapered cross-sectional shape of the inner wall of a weir so that water separated from the solid matter of the sludge is collected smoothly at high speed rotation of the bowl Thereby preventing the weight of the driving load from being increased while the water stagnates in the saturated state by inducing the water-driven hydraulic centrifugal dehydrator.

Another object of the present invention is to provide an apparatus and a method for attaching a wedge or streamlined water propulsion device to a discharge port of a weir part so that water discharged to the discharge port generates propulsive force and water propulsion force accelerates the rotation of the bowl, And to provide a water-driven hydraulic centrifugal dehydrator capable of reducing energy consumption by reducing turbulence and scattering generated when water is discharged and reducing unnecessary energy use.

It is a further object of the present invention to provide an apparatus and a method for reducing the discharge resistance by forming an inclined guide surface on a surface opposite to the rotating direction of the bowl to a solids discharge port through which solids separated from water are discharged, A water-driven hydraulic centrifugal dehydrator.

Another object of the present invention is to increase the dewatering volume by minimizing the diameter of the bowl and lengthening the length of the bowl, thereby increasing the dewatering efficiency of the sludge supplied in the direction of the conical bowl at the position of the cylindrical bowl The present invention also provides a water-driven hydraulic centrifugal dehydrator capable of maximizing gravity acceleration (G-force) and reducing energy consumption by reducing the total driving load during continuous operation because the weight of the screw conveyor can be reduced by reducing the weight thereof. There is.

According to an aspect of the present invention, there is provided a water-driven hydraulic centrifugal dehydrator, comprising: a water supply unit having a discharge port for discharging water separated from a solids of a sludge at one side thereof; A bowl provided with a solids discharge port through which solids are discharged and rotated by the driving force of the main motor; A screw conveyor provided inside the bowl and driven by a hydraulic motor for vehicle speed which adds a rotational force to the rotational force of the main motor to perform squeezing and dewatering of sludge to be injected therein; And a feed pipe passing through the screw conveyor shaft to inject sludge into the screw conveyor,

Wherein the bowl is formed by combining a cylindrical bowl and a conical bowl, a balancing groove is formed along a circumferential surface at an engagement end of the cylindrical bowl, and a balancing groove is formed in the balancing groove, A waiter for adjusting the balance of the waiter is combined with the weigher for adjusting the balance of the waiter, and the rotational load of the bowl is reduced.

A guide hole for guiding movement of the waiter is formed in the balancing groove so as to adjust the balance point of the waiter along the inner side wall in the circumferential direction, and a waiter input port for coupling the waiter to the guide hole is formed at one point of the guide hole And a release preventing block for preventing the waiter from being released when the bowl is rotated at a high speed is coupled to the wafer input port.

The hydraulic motor includes a control unit for controlling the vehicle speed by increasing the hydraulic pressure so that the vehicle speed of the screw conveyor falls within a preset range value when the vehicle speed of the screw conveyor falls below a preset range value.

The control unit may generate a warning sound, stop the supply of the sludge, or generate an operation stop signal when the hydraulic pressure exceeds the preset value.

A guide plate for guiding the collection of water is formed in the wear portion of the bowl and a wear plate for adjusting the discharge amount of water is provided on the outer surface of the discharge port, And the device is attached.

The water propulsion device has one side opened so that one surface thereof communicates with the discharge port and water discharged to the discharge port is discharged in a circumferential direction, and the opposite surface of the opened side surface is water discharged to one open side And an airfoil blade is repositioned so as to have a propulsion force.

In addition, the water propulsion device has one side opened so that one side communicates with the discharge port and water discharged to the discharge port is discharged in a circumferential direction, and the opposite side of the opened side is opened And the sides in the radial direction are formed in a streamlined shape so as to prevent development and scattering.

In addition, the guide surface is formed of a tapered or streamlined guide surface toward the discharge port so that water is collected toward the discharge port.

The bowl and the screw conveyor are characterized in that the ratio of the diameter (D) to the length (L) is 1: 3.6 to 4.3 so that the dewatering volume is increased and the number of revolutions is increased due to weight reduction due to miniaturization, do.

In addition, the solids discharge port of the bowl is coupled with a solids discharge guide cap which reduces the discharge resistance of the solids by machining an inclined guide surface on a surface opposite to the rotating direction of the bowl.

According to the embodiment of the present invention, a balancing groove is formed along the circumferential surface of the bowl, and a balancer for balancing the bowl is combined with the balancing groove, so that the balancing point according to the movement of the waiter is freely adjustable The projecting portion on the surface of the bowl is removed, thereby reducing the rotational load during high-speed rotation of the bowl, thereby reducing energy consumption.

In addition, by using the differential motor for rotating the screw conveyor as a hydraulic motor and controlling the hydraulic pressure of the hydraulic motor according to the concentration of the sludge to control the speed of the screw conveyor, it is possible to respond quickly to the concentration fluctuation of the sludge, So that energy can be saved by reducing the rotational load of the screw conveyor.

A tapered surface or a streamlined guide surface is formed in the wear portion of the bowl to induce the discharge of water to the collection and discharge port, thereby preventing the driving load from being increased due to stagnation of the separated water, thereby saving energy.

In addition, a water propulsion device is coupled to a wear plate provided at a discharge port of the weave portion, thereby inducing the water discharged to the discharge port to generate propulsion force, thereby accelerating the rotation of the bowl to increase the rotational force of the bowl, .

In addition, the water propulsion device is manufactured as an airfoil or a streamline type, thereby reducing the vortex phenomenon and scattering generated when the water is discharged, thereby reducing unnecessary energy use, thereby saving energy.

In addition, a solids discharge guide cap formed by machining a slanting guide surface on a surface opposite to the rotating direction of the bowl is connected to the solids discharge port through which the solids separated from the water are discharged, thereby reducing the discharging resistance of the solids, As a result, energy can be saved.

In addition, by minimizing the diameter of the bowl and lengthening the length of the bowl, the dewatering volume is increased to increase the dewatering efficiency of the sludge and reduce the weight due to the miniaturization of the screw conveyor. .

1 is a front sectional view showing the overall configuration of a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention;
2 is a conceptual diagram showing sludge supply and dehydration of a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention.
3 is a graph illustrating the proportional relationship between the hydraulic pressure and the vehicle speed of the hydraulic motor in the water-driven hydraulic centrifugal dehydrator according to the embodiment of the present invention.
4 (a) and 4 (b) are cross-sectional views illustrating a coupling structure of a waiter that adjusts balancing of a bowl in a water-powered hydraulic centrifugal dehydrator according to an embodiment of the present invention.
5 is a front section view of a bowl for explaining the ratio of the diameter D to the length L of the bowl in a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention.
6 is an enlarged view for explaining an improved part of a weir part in a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention;
7 (a) and 7 (b) are views showing a state in which the bowl and the ware plate are coupled to the discharge port of the ware unit shown in FIG. 6 to control the discharge amount of water desorbed from the sludge, Enlarged perspective view and sectional view for explaining the water propulsion device.
8 (a) and 8 (b) show another embodiment of the water propelling device shown in Fig. 6, in which the one side is made into a streamlined shape in the radial direction in order to reduce vapors and scattering of discharged water, .
FIG. 9 is an enlarged view of a part of the bowl according to the present invention to illustrate a solids discharge guide cap coupled to a solids discharge port of the bowl to reduce the discharge resistance of the solids. FIG.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. For purposes of this specification, like reference numerals in the drawings denote like elements unless otherwise indicated.

Referring to FIGS. 1 and 2, the overall concept of a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention will be described. Referring to FIG. 3, the hydraulic pressure is controlled according to the concentration of the sludge to control the speed of the screw conveyor Referring to FIG. 5, a description will be given of the hydraulic structure of a hydraulic motor according to the present invention, with reference to FIGS. 4 (a) and 4 (b) L and the improved portion of the wear portion of the bowl will be described with reference to FIG. Embodiments of a water propulsion device will be described with reference to Figs. 7 (a) and 7 (b) and Figs. 8 (a) and 8 (b) Described is a solids discharge guide cap which reduces the discharge resistance of the solids.

As shown in FIG. 1, a water-driven hydraulic centrifugal dehydrator according to an embodiment of the present invention includes a ware unit 110 having a discharge port through which water separated from solids of sludge is discharged, A bowl 100 provided with a solids discharge port 140 through which solids are discharged and rotated by the driving force of the main motor 180, a hydraulic motor 250 provided inside the bowl and adding a rotational force to the rotational force of the main motor, A screw conveyor 200 for squeezing and dewatering the sludge to be introduced therein, and a feed pipe 300 for passing the sludge through the screw conveyor shaft into the screw conveyor. In addition, a water drain pipe 410 for discharging the water discharged to the outlet of the bowl to the outside, and a solids discharge pipe 420 for draining the solids discharged to the solids discharge port to the outside are provided on the outside of the bowl, A housing 400 is provided.

First, the bowl 100 is constituted by a combination of a cylindrical bowl 101 and a conical bowl 102. At this time, the ware unit 110 is formed at one side of the cylindrical bowl 101, and the solid material outlet 140 is formed at one side of the conical bowl 102. A screw conveyor 200 is provided in the bowl 100.

The screw conveyor 200 is rotatably coupled to the inside of the bowl 100 and is connected to the hydraulic motor 250.

Hydraulic motor (250) A motor that converts the hydraulic energy generated by a hydraulic pump to the mechanical energy of rotary motion.

The hydraulic motor 250 is connected to the main motor 180 for rotating the bowl 100 at a high speed and rotates the screw conveyor 200 by adding additional rotational force to the rotational force of the main motor 180. Normally, a rotational force of about 1 rpm to 12 rpm is applied to the rotational force of the main motor 180 to rotate the screw conveyor 200, wherein the rpm added to the screw conveyor is the vehicle speed.

Inside the screw conveyor 200, a chamber 210 into which sludge is injected is provided.

Sludge and flocculant are introduced into the chamber 210 through a feed pipe 300 passing through the screw conveyor shaft. At this time, the sludge and the coagulant introduced into the chamber 210 of the screw conveyor through the feed pipe 300 are supplied in the direction of the conical bowl 102 from the position of the cylindrical bowl 101.

As shown in FIG. 2, the sludge injected through the feed pipe 30 receives centrifugal force due to high-speed rotation of the bowl and pushes the solids having a large specific gravity outward. The water having a lighter weight than the solids is collected and separated in the center direction of the bowl, The solids are conveyed to a rotating screw conveyor (200) and discharged to the outside through a solids outlet (140).

At this time, the injected sludge usually has a concentration variation ranging from 1 to 4%. When the concentration of the injected sludge is high, that is, when the percentage of solids is high, the vehicle speed of the screw conveyor 200 for conveying solid matters is decreased.

Here, the hydraulic motor 250 for rotating the screw conveyor 200 includes a control unit for controlling the speed of the screw conveyor 200.

The control unit measures the vehicle speed of the screw conveyor 200 according to the concentration of the sludge. When the measured vehicle speed falls below the preset range value, the control unit increases the hydraulic pressure to increase the vehicle speed of the screw conveyor 200.

For example, if the bowl 100 rotates at approximately 3000 rpm and the screw conveyor 200 rotates at 300 rpm with a vehicle speed of 5 rpm and operates at a hydraulic pressure of approximately 130 to 140 bar when the sludge concentration is within the normal range, When the concentration of the sludge is higher than the normal range and the solid percentage is increased, the vehicle speed of the screw conveyor 200 may drop to 5 rpm or less due to the density of the solid matter. At this time, the control unit raises the hydraulic pressure from 150 bar to 160 bar, and allows the screw conveyor 200 to maintain a vehicle speed of 5 rpm or more to smoothly discharge the solid matter.

3 is a graph showing an analog control characteristic at a pressure change point, wherein the hydraulic pressure and the vehicle speed have a proportional relationship.

That is, when the hydraulic pressure is increased, the vehicle speed of the screw conveyor 200 is increased, and the force (torque) for conveying the solid material is increased by the screw conveyor 200, so that the high-density solid material is smoothly discharged.

As described above, the hydraulic motor 250 can quickly cope with concentration fluctuation of the sludge to be introduced, and can reduce the rotational load of the screw conveyor 200, thereby saving energy.

In FIG. 3, the operating point is automatically changed according to the torque, P1 is the system setting pressure value at which the centrifugal dehydrator is stopped with the warning sound and the sludge supply is stopped, and P2 is the system pressure value at which the centrifugal dehydrator is stopped. And, the hydraulic maximum pressure (Pmax) is the system limited maximum limit input value (280 bar). Here, the values of P1 and P2 can be set in the control unit.

In this way, when the hydraulic pressure exceeds the preset value, the control unit can generate a warning sound, stop the supply of the sludge, or generate a signal to stop the operation of the centrifugal dehydrator.

4, a balancing groove 160 is formed along the circumferential surface of the coupling end of the cylindrical bowl 101 coupled with the conical bowl 102, (160) is coupled to a Weighter (162) which controls the balancing of the bowl.

More specifically, as shown in FIG. 4A, a balancing groove 160 is formed along the circumferential surface of the coupling end of the cylindrical bowl, and a balancing groove 160 is formed in the balancing groove 160, A guide hole 161 is formed along the side wall and a waiter 162 is movably coupled to the guide hole 161 of the balancing groove as shown in FIG. So that the balance point can be freely adjusted as the waiter 162 moves.

In addition, a waiter input port for coupling the waiter 162 to the guide hole 161 is formed at one point of the balancing groove, and the waiter insertion port is formed at one point of the balancing groove to prevent the waiter 162 from being loosened during high- (163).

Thus, by assembling the waiter 162 by inserting the waiter 162 into the guide hole 161 after measuring the rotational balancing after assembling the bowl 100, it is not necessary to join the waiter by drilling and welding as in the conventional method, Since there is no part protruding from the surface of the bowl 100, the amount of rotation load during high-speed rotation of the bowl 100 can be reduced to save energy.

Meanwhile, as shown in FIG. 5, the bowl 100 has a ratio of the diameter D to the length L of 1: 3.6 to 4.3. The screw conveyor 200 provided in the bowl 100 also has a ratio of diameter to length of 1: 3.6 to 4.3 according to the size of the bowl 100. That is, the bowl 100 of the present invention and the screw conveyor are smaller in diameter and longer than the bowl of the conventional centrifugal dehydrator.

By minimizing the diameter of the bowl and screw conveyor and lengthening the length of the bowl and screw conveyor, the dewatering volume of the sludge is increased and the dewatering efficiency of the sludge is increased. In addition, since the weight of the screw conveyor can be reduced by reducing the weight, the number of revolutions can be increased, thereby maximizing the gravitational acceleration (G-force), thereby reducing energy consumption by reducing the driving load of the main motor and the hydraulic motor during continuous operation.

6, a tapered surface is formed toward the discharge port so that the water separated from the sludge is smoothly collected toward the discharge port 111, or a streamlined guide surface 112 is formed do.

More specifically, the conventional ware unit forms a side perpendicular to the longitudinal direction of the bowl and has a discharge port formed on the side thereof. Since centrifugal force acts on the bowl at a high speed, a desorption filtrate separated from the sludge forms a vortex There is a problem that energy is consumed.

6, the tapered surface facing the discharge port 111 is formed in the wear portion 110 of the bowl or the water guide surface 112 is formed so that the water separated from the sludge is discharged from the tapered surface or the wired surface The water is guided to the discharge port 111 along the guide surface 112 so that the discharge of water can be smoothly performed even when centrifugal force acts on the bowl 100 due to high speed rotation.

7 (a) and 7 (b), the discharge port 111 of the ware unit is formed at regular intervals along the circumferential direction of the ware unit, and the discharge port 111 of the ware unit is provided with a wear plate (Not shown).

The wear plate 120 is coupled to the outer surface of the discharge port 111 so as to be capable of upward and downward flow within the range of the elongate hole 121 through the upper and lower elongated holes 121 formed in the weld plate 120. [ do. That is, the wear plate 120 adjusts the discharge amount of the water by adjusting the opening width of the discharge port 111. [

A water propelling device 130 is attached to one surface of the wear plate 120 to prevent water discharged to the discharge port from scattering in all directions and to generate a propulsive force by guiding the discharge direction of water.

Here, the water propulsion device 130 includes an airfoil blade piece, one surface of which communicates with the discharge port and one side surface of the discharge port is opened to guide the water discharged to the discharge port in the circumferential direction when the bowl is rotated. In other words, the blade reorganization of the airfoil induces the centrifugal force of the water discharged to the discharge port 111 to generate the propulsion force, and the rotational force of the bowl 100 is increased by using the generated propulsion force. .

8A and 8B show another embodiment of the water propelling device. In the water propelling device 130 according to another embodiment, the water propelling device 130 is coupled to the ware plate 120, And the other side extending from the open side is formed in a streamlined shape in the radial direction so as to be closed so that the discharged water is discharged to the open side The streamlined side prevents vortices and scattering, and generates water propulsion.

As shown in FIG. 9, the inclined guide surface 152 is machined on the surface of the solid outlet 140 formed on the side of the conical bowl 102 opposite to the rotating direction of the bowl to reduce the discharge resistance of the solid The solids discharge guide cap 150 is coupled.

Since the solid material discharged to the conventional solid material discharge port is discharged at a high rotational speed of the bowl, resistance is generated on the end surface of the solid material discharge port opposite to the rotating direction of the bowl, and the solid material discharge port is worn out severely during long- There is a problem in that the flow of the solids is reduced as well as shortening.

The present invention is characterized in that when the solids discharge guide cap 150 in which the inclined guide surface 152 is formed on the surface opposite to the rotating direction of the bowl 100 is buried in the solids discharge port 140 and coupled, It is possible to smoothly discharge the solid material along the inclined guide surface of the cap 150 to reduce the discharge resistance and to prevent the rotating load from being weighted to save energy, It is possible to extend the life of the battery.

As described above, according to the present invention, a balancing groove is formed along the circumferential surface of the bowl, and a balancing groove is formed in the balancing groove, and a balancer for adjusting the balancing of the bowl is coupled to the balancing groove. By eliminating the protruding parts of the surface, it is possible to save energy by reducing the rotational load during high speed rotation of the bowl.

In addition, by using the differential motor for rotating the screw conveyor as a hydraulic motor and controlling the hydraulic pressure of the hydraulic motor according to the concentration of the sludge to control the speed of the screw conveyor, it is possible to respond quickly to the concentration fluctuation of the sludge, It is possible to discharge smoothly, and it is possible to reduce energy by reducing the rotational load of the screw conveyor.

In addition, a tapered surface or a streamlined guide surface is formed in the wear portion of the bowl to induce the discharge of water to the collection and discharge port, thereby preventing the driving load from being increased due to stagnation of the discharged water, thereby saving energy.

In addition, a water propulsion device is coupled to a wear plate provided at a discharge port of the ware unit to induce the water discharged to the discharge port to generate propulsion force, thereby accelerating the rotation of the bowl to increase the rotational force of the bowl, thereby saving energy .

In addition, the water propulsion device is manufactured as an airfoil or a streamline type, which reduces energy consumption by reducing unnecessary energy use by reducing vapors and scattering generated when water is discharged.

In addition, a solids discharge guide cap formed by machining a slanting guide surface on a surface opposite to the rotating direction of the bowl is connected to the solids discharge port through which the solids separated from the water are discharged, thereby reducing the discharging resistance of the solids, So that energy can be saved.

In addition, by minimizing the diameter of the bowl and lengthening the length of the bowl, the dewatering volume is increased to increase the dewatering efficiency of the sludge and reduce the weight by reducing the size of the screw conveyor.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents may be resorted to as falling within the scope of the invention.

100: Bowl 101: Cylindrical Bowl
102: Conical bowl 110: Wear part
111: outlet 112: guiding surface
120: Wear plate 121: Long hole
130: Water propulsion device 140: Solids outlet
150: solids discharge guide cap 152: guide surface
160: Balancing groove 161: Guide hole
162: Waiter 163: Disengagement prevention block
180: main motor 200: screw conveyor
210: chamber 250: hydraulic motor
300: feed pipe 400: housing
410: Water pipe 420: Solid pipe

Claims (10)

A bowl which is provided at one side thereof with a discharge portion for discharging water separated from the solids of the sludge and has a solid discharge port through which the solids separated from the water are discharged from the other side and is rotated by the driving force of the main motor; A screw conveyor provided inside the bowl and driven by a hydraulic motor for vehicle speed which adds a rotational force to the rotational force of the main motor to perform squeezing and dewatering of sludge to be injected therein; And a feed pipe passing through the screw conveyor shaft to inject sludge into the screw conveyor,
Wherein the bowl is formed by combining a cylindrical bowl and a conical bowl, a balancing groove is formed along a circumferential surface at an engagement end of the cylindrical bowl, and a balancing groove is formed in the balancing groove, Wherein the weight balance of the waiter is freely adjustable and the rotational load of the bowl is reduced,
Wherein the hydraulic motor includes a control unit for controlling the vehicle speed by raising the hydraulic pressure so that the vehicle speed of the screw conveyor falls within a predetermined range value when the vehicle speed of the screw conveyor falls below a preset range value,
Wherein the controller generates a warning sound, stops the supply of the sludge, or generates an operation stop signal when the hydraulic pressure exceeds a preset value. The method according to claim 1,
A guide hole for guiding the movement of the waiter is formed in the balancing groove so as to adjust the balance point of the waiter along the inner side wall in the circumferential direction, and a waiter input port for joining the waiter to the guide hole is formed at one point of the guide hole Wherein the waiter insertion port is coupled with a departure prevention block for preventing the waiter from being released when the bowl is rotated at a high speed. delete delete The method according to claim 1,
A guide plate for guiding the collection of water is formed in the wear portion of the bowl and a wear plate for adjusting the discharge amount of water is provided on the outer surface of the discharge port, Wherein the device is attached. 6. The method of claim 5,
The water propulsion device has one side opened so that one side communicates with the discharge port and water discharged to the discharge port is discharged in a circumferential direction, Wherein the water-decomposing portion is formed of a blade-shaped piece of an airfoil. 6. The method of claim 5,
The water propulsion device has one side opened so that one side communicates with the discharge port and the water discharged to the discharge port is discharged in a circumferential direction, and the opposite side of the opened side has a vortex phenomenon Wherein the side surface in the radial direction is formed in a streamlined shape so as to prevent scattering. 6. The method of claim 5,
Wherein the guide surface comprises a tapered or streamlined guide surface toward the discharge port so that water is collected toward the discharge port. The method according to claim 1,
Wherein the bowl and the screw conveyor have a ratio of the diameter (D) to the length (L) of 1: 3.6 to 4.3. The method according to claim 1,
Wherein the solids outlet of the bowl is coupled with a solids discharge guide cap which is machined into a surface opposite the rotational direction of the bowl to reduce the discharge resistance of the solids.
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US20220410177A1 (en) * 2021-06-24 2022-12-29 Elgin Separation Solutions Industrials, Llc Electronically Controlled Hydraulic Decanter Centrifuge

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