KR20150022317A - Piston type sludge dehydration apparatus - Google Patents

Abstract

The present invention relates to a piston-type sludge dehydration apparatus that presses sludge with a strong pressing force by using two pistons so that low water content can be obtained regardless of sludge characteristics. The piston-type sludge dehydration apparatus according to the present invention includes a casing that includes a cylindrical inner space, an outlet, and a supply passage; a supply screw device that is arranged on the supply passage and supplies sludge into the inner space by means of rotation; a filter device that is arranged in the casing and discharges only a liquid element that is generated by the pressing of the sludge; a fixed piston device that is arranged on one side of the casing and presses the sludge in the inner space; and a rotating piston device that is arranged on the side opposite to the fixed piston device and supports the sludge which is pressed by the fixed piston device. The fixed piston device presses the sludge when the sludge is injected through the supply screw device, at which point the rotating piston device supplies the sludge by blocking the outlet. In a case where the pressing is complete, the rotating piston opens the outlet and discharges the pressed sludge.

Description

[0001] The present invention relates to a piston type sludge dehydration apparatus,

The present invention relates to a piston-type sludge dewatering device, and more particularly, to a piston-type sludge dewatering device capable of dewatering various sludge generated in a sewage treatment facility or a water treatment facility at a low water content by a high pressing force.

Generally, in the process of treating various wastes in processing facilities such as settling basin, inorganic regulating agent such as ash, iron chloride or polymerization flocculant is added to aggregate the suspended solids in the sewage to form sludge, which is mainly incinerated or buried .

Sludge treatment by landfill or marine dumping causes various kinds of pollution, and the incineration treatment method is mainly used nowadays. The sludge recovered from the treatment facilities is water at 90% by weight, and therefore, the sludge must be dehydrated using a dewatering device.

If the sludge having less dehydration is incinerated, a lot of heat energy is required to evaporate moisture, and since combustion efficiency is lowered, pollutants are generated, so it is preferable to dehydrate the sludge as appropriate for incineration as much as possible.

The dewatering device for dewatering sludge is divided into a centrifugal dewatering method and a pressurized dewatering method. In the centrifugal dewatering method, when the sludge is fed to the inside of the conveying screw driving shaft having a helical conveying blade and hollow inside, The sludge is brought into close contact with the inner wall surface of the dewatering drum installed to rotate in the opposite direction from the outside and the water is discharged to the water discharge port and the sludge is discharged to the sludge discharge port by the transfer blade.

The centrifugal dewatering system has a relatively high dewatering rate, but is expensive and has a relatively high power consumption.

On the other hand, the squeeze dewatering system can be implemented at a relatively low cost in accordance with the use of the sludge, such as a belt press or a screw press, and can be installed at a relatively low cost. However, the dewatering rate .

In order to increase the dewatering rate in the squeeze-dewatering system, the dewatering rate can be increased by increasing the pressing force applied to the sludge. However, the lifetime of the dehydrator is reduced due to limitations of the filter strength used in the dewatering system.

In order to overcome such disadvantages, Patent No. 1120669 suggests a new type of filter.

The present invention relates to a hollow cylindrical and cylindrical casing; An inlet port formed in the casing for introducing sludge therein; A discharge port formed in the casing to discharge sludge; An impeller shaft which is located inside the casing and is rotated by an external motor and formed with a screw whose pitch gradually diminishes at the outer periphery so as to pressurize the sludge introduced into the inlet to move to the outlet; And a filter part for filtering moisture discharged from the sludge pressurized by the screw to the casing.

Particularly, the configuration of the filter part is such that a clearance portion of 1/1000 mm or more and 1 mm or less is formed on the side surface in the longitudinal direction and a plurality of members, which are formed by inclining the upper and lower surfaces of the cross section at specific angles, And the sludge is discharged from the sludge through the gap, thereby performing the function of the filter even at a high pressing force.

However, when the sludge itself is slippery, there is a limitation in squeezing the sludge only by the single screw itself, and there is a disadvantage in that a sufficient water content can not be obtained in a specific sludge.

SUMMARY OF THE INVENTION The present invention has been made in order to overcome the disadvantages of the prior art as described above and provides a piston type sludge dewatering device capable of obtaining a low water content regardless of the characteristics of sludge by pressing the sludge with high pressure using two pistons The purpose of that is to do.

According to an aspect of the present invention, there is provided a piston type sludge dewatering apparatus comprising: a casing including a cylindrical inner space, an outlet, and a supply passage; A supply screw device installed on the supply passage and supplying sludge to the inner space by rotation; A filter device installed in the casing for discharging only the liquid component generated by the pressurization of the sludge; A fixed piston device installed at one side of the casing to pressurize the sludge in the inner space; And a rotary piston device installed on the opposite side of the stationary piston device for supporting the sludge pressurized by the stationary piston device, wherein the stationary piston device pressurizes when the sludge is introduced through the supply screw device, The rotary piston device supports the sludge by closing the discharge port, and when the pressurization is completed, the rotary piston opens the discharge port to discharge the pressurized sludge.

Advantageously, the fixed piston device comprises: a fixed actuator fixed to the floor; A fixed piston moving in the inner space by the fixed actuator; And a first sealing material and a second sealing material for sealing between the stationary piston and the casing, the rotating piston device comprising: a rotating actuator fixed to the floor; A rotary piston moving in the inner space by the rotary actuator; A rotary motor for rotating the rotary piston; And a third seal member that seals between the rotary piston and the casing.

More preferably, a rotating blade is formed on the end surface of the rotating piston, and when the opening is opened by the rotating piston after the pressing by the rotating piston is completed, the rotating piston rotates to crush the pressed sludge .

Preferably, the filter device comprises: a plurality of unit members having a circular cross section, wherein the unit members are arranged in a circumferential direction of the casing, a support is arranged at a position of a unit member, And the mutual contact force of the unit members is changed by operation of the filter actuator.

More preferably, the filter actuator vibrates the support to remove foreign matter contained between the members.

The piston type sludge dewatering apparatus according to the present invention generates a high pressing force with two pistons and is capable of dewatering at a low water content regardless of the characteristics of the sludge. Also, when the two pistons are operated in conjunction with each other, the pressing force can be controlled very easily.

1 is a sectional view of a piston type sludge dewatering apparatus according to the present invention,
Fig. 2 is a partially enlarged view of Fig. 1,
3 is a cross-sectional view of the filter device shown in Fig. 1,
Figure 4 is a perspective view of the unit member shown in Figure 3,
Fig. 5 is a perspective view of the casing in which the filter device shown in Fig. 3 is located,
FIG. 6 is a side view of the filter device shown in FIG. 1,
7 is an operational state diagram of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the dewatering device 100 according to the present invention includes a casing 10, a fixed piston device 20, a rotary piston device 30, a feed screw device 40, a filter device 50, .

First, the casing 10 is fixed to the bottom 1, a cylindrical inner space 11 is formed therein, and a supply passage 12 is formed in a vertical direction in the middle region.

Further, the internal space 11 is formed with a filter device 50, and water is discharged through the filter device 50.

A discharge port 13 is formed at a lower end of the casing 10 to discharge the pressurized sludge.

The supply screw device 40 includes a supply shaft 41 installed longitudinally in the supply passage 12, a supply screw 42 formed on the supply shaft 41, And a supply motor (43) connected to the supply shaft (41) to rotate the supply shaft (41). The sludge is supplied to the end of the supply path (12).

When the sludge is supplied to the end of the supply passage 12, the sludge moves downward according to the rotation of the supply screw 42 and is guided to the inner space 11 of the casing 10.

If necessary, a pressurizing device or the like which can pressurize the sludge may be added to the end of the supply passage 12. In addition, a cover may be added to close the supply passage after the sludge is charged.

On the other hand, a fixed piston device 20 is disposed on one side of the casing 10.

The fixed piston device 20 includes a fixed actuator 21 and a fixed piston 22 connected to the fixed actuator 21 to move the inner space 11 of the casing 10, 22 are initially formed to have a length sufficient to occupy the entire inner space 11 on the right side of the supply passage 12. [

The first and second sealing members 23 and 24 are formed at the left end and the right end of the stationary piston 22 to maintain sealing with the casing 10, respectively.

When the fixed actuator 21 is operated, the fixed piston 22 moves to the inner space 11 where the filter device 50 is located in the casing 10 to pressurize the sludge, and the fixed actuator 21, Is preferable because it provides a high pressure to be driven by hydraulic pressure, but it can be changed to electric or the like if necessary.

On the other hand, on the left side of the casing (10), a rotary piston device (30) is located.

The rotary piston device 30 includes a rotary actuator 31, a rotary piston 32 connected to the rotary actuator 31 and moving in the inner space 11, a rotary motor 32 for rotating the rotary piston 32 33).

Here, the rotary actuator 31 is driven by hydraulic pressure, and the rotary motor 33 can also be changed to a hydraulic motor that operates with hydraulic pressure, and also to an electric type if necessary.

2, the rotary piston 32 is sealed with the casing 10 by a third sealing material 34, and a rotary blade 35 is formed at an end thereof. The rotary knife 35 is for crushing sludge when the sludge is fixed by pressing. When the rotary motor 33 is operated, the rotary piston 32 rotates and rotates at the same time.

The rotary piston 32 is initially positioned past the outlet 13 and just before the filter device 50.

When the sealing material 23, 24, 34 is made of a metal material, it is preferable that the hardness is lower than that of the casing 10.

On the other hand, the casing 10 includes a filter device 50 as shown in Fig.

The filter device 50 includes a unit member 51 having a plurality of circular cross sections arranged in the inner circumferential direction of the casing 10, A plurality of pressing members 52 for increasing the contact force, two fixing flanges 59 for fixing the members 51 to the casing 10, a plurality of pressing members 52 for moving the pressing members 52 in the radial direction of the casing 10 And a filter actuator (53).

First, the member 51 is formed into a circular cross section as shown in FIG. 4, and fixed ends 58 for fixing to the casing 10 are formed at both ends.

The fixed end 58 is preferably formed at the center of the circular cross section.

Meanwhile, the casing 10 is formed in a circular shape, and includes a cut surface 57 for discharging moisture by internal pressure as shown in FIG.

The members 51 are continuously arranged in the circular arc direction inside the casing 10, and a plurality of members 51 may be arranged in the longitudinal direction of the casing 10, if necessary.

The member 51 is fixed at both ends of the casing 10 by a fixing flange 59 at which the fixing end 58 is supported by the fixing flange 59, Or the like.

In this case, when the two members 51 are arranged in the longitudinal direction of the casing 10, a configuration corresponding to the fixing flange 59 is formed in the middle of the casing 10, .

The function of the filter can be sufficiently performed by disposing the unit member 51 in the circumferential direction on the inner surface of the casing 10 and fixing it by the fixing flange 59. However, 52 can be disposed.

That is, as shown in FIG. 6, a plurality of members 51 are placed in contact with each other, but a pressing member 52 is disposed between the members 51.

However, it is preferable that three pressing members 52 are arranged at intervals of 120 degrees in order to increase the pressing force of the entire members 51. [

The pressing body (52) moves in the radial direction of the end surface of the casing (10), and the width of the pressing body (52) changes according to the moving direction.

As shown in FIG. 6, when moving in the radial direction of the end surface of the casing 10, it is preferable to press the neighboring member 51, but it may be implemented in other forms.

A filter actuator 53 is attached to an end of the pressing body 52 to move the pressing body 52 up and down.

At this time, the member 51 is pressed when the filter actuator 53 moves in the radial direction of the casing 10, and the pressing force of the member 51 is released when the filter actuator 53 is in the opposite direction.

Therefore, the degree of filtering by the operation of the filter actuator 53 can be adjusted.

Further, when the filter actuator 53 is operated in the vibration mode, there is an advantage that foreign substances sandwiched between the members 51 can be removed.

The filter actuator 53 is preferably operated by hydraulic pressure, but may be configured to operate as a pneumatic or electric actuator, if desired.

Particularly, the filter device 50 according to the present invention is configured such that the members 51 are disposed without any clearance and are filtered by occurrence of a clearance due to contact deformation of the members 51 when a high pressing force is applied to the inside of the casing 10 , Has excellent characteristics in a high-pressure dewatering device, and has a long life by structural simplicity.

Further, when the member 51 is made of metal and the size of the circular cross section is adjusted, it is possible to cope with the diameter of any casing 10, which is advantageous in that it has a high design freedom.

The member 51 is preferably made of a metal material, but may be made of other synthetic resin, ceramics, or the like.

The dewatering device 100 according to the present invention includes a fixed piston device 20 and a rotary piston device 30 to operate two pressure pistons interlocked to each other to provide a high dewatering capability. Go ahead.

First, as shown in FIG. 7 (a), sludge is injected into the inner space 11 through the feed screw device 40. At this time, the stationary piston 22 is located on the right side of the supply passage 12, and the rotary piston 32 is located on the right side of the discharge port 13 to prevent the discharge of the sludge.

Next, the stationary piston 22 advances as shown in Fig. 7 (b). At this time, moisture contained in the sludge is discharged through the filter device 50, and the sludge is fixed.

Next, as shown in Fig. 7 (c), the rotary piston 32 retracts to a position where the discharge port 13 is opened, and then rotates.

Next, as shown in Fig. 7 (d), when the fixed piston 32 advances to the right of the discharge port, the sludge squeezed out is discharged to the discharge port 13. [

At this time, since the rotary blade 35 attached to the rotary piston 32 rotates, the fixed sludge is crushed by the rotary blade 35 and is easily discharged to the discharge port 13.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

1: bottom 10: casing
11: inner space 12: supply passage
13: exhaust port 20: fixed piston device
21: fixed actuator 22: fixed piston
23: first sealing material 24: second sealing material
30: Rotary piston device 31: Rotary actuator
32: rotary piston 33: rotary motor
34: third sealing material 35: rotary blade
40: Feed screw device 41: Feed shaft
42: feed screw 43: feed motor
50: Filter device 51: Member
52: pressure body 53: filter actuator
57: cut surface 58: fixed end
100: Dewatering device

Claims (5)

In the piston type sludge dewatering device,
A casing including a cylindrical inner space and a discharge port and a supply passage;
A supply screw device installed on the supply passage and supplying sludge to the inner space by rotation;
A filter device installed in the casing for discharging only the liquid component generated by the pressurization of the sludge;
A fixed piston device installed at one side of the casing to pressurize the sludge in the inner space; And
And a rotary piston device installed opposite the stationary piston device for supporting the sludge pressurized by the stationary piston device,
When the sludge is introduced through the supply screw device, the stationary piston device pressurizes the rotary piston device, thereby supporting the sludge by closing the discharge port. When the pressurization is completed, the rotary piston opens the discharge port to discharge the pressurized sludge Wherein the piston-type sludge dewatering device is a piston-type sludge dewatering device.
The apparatus of claim 1, wherein the stationary piston device comprises:
A fixed actuator fixed to the floor;
A fixed piston moving in the inner space by the fixed actuator; And
And a first seal member and a second seal member that seal between the stationary piston and the casing,
The rotary piston device comprises:
A rotating actuator fixed to the floor;
A rotary piston moving in the inner space by the rotary actuator;
A rotary motor for rotating the rotary piston; And
And a third seal member for sealing between the rotary piston and the casing.
[3] The apparatus of claim 2, wherein a rotating blade is formed on an end surface of the rotating piston, and when the outlet is opened by the rotating piston after the pressing by the stationary piston is completed, the rotating piston rotates to crush the pressed sludge Wherein the piston-type sludge dewatering device comprises:
The filter device of claim 1, wherein the filter device comprises:
Wherein the unit members are arranged in a circumferential direction of the casing, a support is arranged at a position of a unit member, and the support is connected to a filter actuator so that the operation of the filter actuator Thereby changing the mutual contact force of the unit members.
5. The piston type sludge dewatering device of claim 4, wherein the filter actuator vibrates the support to remove foreign matter contained between the members.

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