KR101181237B1 - High pressure screw dewatering equipment - Google Patents

Abstract

PURPOSE: A high pressure screw-based dehydrating apparatus is provided to save costs required for treating sludge and to prevent environmental pollution by treating the sludge. CONSTITUTION: A high pressure screw-based dehydrating apparatus includes a coagulating tank, a main body(30), and a controlling part. Sludge is coagulated in the internal space of the coagulating tank. The coagulated sludge is introduced into the main body. The main body includes a casing, a driving part(32), a screw(33), a pressurizing unit(40), and a moisture discharging part(36). The casing includes a sludge inlet(311) and a sludge outlet(312). The screw transfers the sludge form the sludge inlet to the sludge outlet. The pressurizing unit is fixed to the casing and pressurizes the sludge. The moisture discharging part is arranged in the casing discharges moisture form the internal space to the external space of the coagulating tank.

Description

High pressure screw dewatering equipment

The present invention relates to a high pressure screw dewatering device, and more particularly, to a high pressure screw dewatering device for compressing and dewatering sludge such as sewage or wastewater generated in an industrial facility or at home.

With the development of industry, industrial facilities continue to increase, the amount of sewage or wastewater generated by increasing industrial facilities increases, and the amount of sewage or sewage generated by households increases with the increase of population and quality of life. There is a situation.

Facilities for treating sewage or wastewater generated in industrial facilities or homes are also becoming larger and larger, and sewage or wastewater is treated by various treatment methods.

In such a facility for treating sewage or wastewater, the sewage or wastewater is purified through a plurality of stages and discharged into a river or the sea, or recycled into various waters.

As such, the sewage or sewage and wastewater generated in industrial facilities or homes continues to increase, and the treatment facilities for treating them also need to increase.

The sewage or sewage and wastewater purified through a plurality of steps in the treatment facility is separated into sludge and water, which are sediments through various treatments, and the water is purified through a separate process, and the sludge, which is a sediment, is landfilled, dumped, and recycled. Or incineration or the like.

However, since marine dumping, which is a method of treating a large portion of sludge, which is a sediment such as sewage treatment plant or livestock wastewater, has been banned since 2012, the treatment method of the sludge has emerged as a serious issue, and the water content for treating the sludge has been raised. There is a demand for a lowering method.

In general, the dewatering device is used to separate the sludge agglomerated in the form of floc (Floc) using a flocculant with water, and the apparatus used in the dehydration process of separating the water and sludge contained in the sludge is called a dewatering device.

That is, the dewatering device is separated into water and sludge from waste water, etc., by lowering the water content of the sludge by further dewatering the water contained in the separated sludge from the sludge, and discharged sludge in the form of a cake can be treated. To do so.

The industrial dewatering device is classified into a belt type, a centrifugal type, and a fluidized plate type according to a method of dewatering sludge. A belt type dewatering device includes a sludge aggregated while moving the sludge by a belt and is compressed and included in the sludge. Dehydration is achieved by releasing moisture.

Then, the centrifugal dehydrator is a sludge in the inner space of the rotating body by applying a centrifugal force to the sludge to remove the moisture contained in the sludge, the water is discharged, the dewatered sludge is in the form of a cake of the rotating body It is dehydrated in such a way that it remains in the interior space.

In addition, the fluidized plate type dehydration device is configured to discharge the water contained in the sludge by the flow movement of the low speed rotating shaft by gravity, and the sludge discharged water is transported by a screw coupled with the low speed rotating shaft is configured to be discharged do.

This fluidized plate type dehydrator is an environmentally friendly dewatering device mainly used for medium and small scale wastewater treatment facilities.

On the other hand, the Republic of Korea Patent No. 10-0715616 discloses an invention relating to the air-pressing sludge dehydrator, the registered patent is to make the forward and backward operation of the compressed piston in the screen cylinder by the drive of the individually connected cylinder sludge Dehydration pressure and the movement distance of the piston can be controlled in whole or in part so that the device is not overwhelmed even when the sludge contains foreign substances, and smoothly discharged by the stroke of the piston even when the compressed and dewatered sludge is discharged. The invention for the following is disclosed.

Further, in the registered patent, a plurality of screen cylinders for dewatering the sludge are disposed through the oscillation of the piston at the same radius around the rotation axis to dewater the sludge through a cycle consisting of compression dehydration, discharge of dewatered sludge, and screen cylinder cleaning. Disclosed is a piston pressurized sludge dehydrator.

An object of the present invention is to provide a high-pressure screw dewatering device for reducing the water content of the sludge while proceeding with the concentration and dehydration of the sludge generated in the treatment process, such as sewage or waste water using the pressure of the fluid.

High pressure screw dewatering device according to the present invention, the coagulation tank to aggregate the sludge in the inner space; A main body into which the sludge aggregated in connection with the agglomeration tank is introduced; And a control unit for controlling the coagulation tank and the main body. And,

The main body includes a casing having a sludge inlet through which the sludge flows and a sludge discharge port through which the sludge is discharged; A drive unit fixed to an outer surface of the casing to generate power; A screw for transferring the sludge from the sludge inlet to the sludge outlet while rotating by the power provided by the driving unit; A compression unit fixed to the casing and compressing the sludge in a direction crossing with the rotation axis of the screw; And a water discharge part formed in the casing to discharge moisture from the internal space to the external space. .

The screw type dewatering device according to the present invention is configured to dewater water from the sludge as the sludge is concentrated and dewatered using the pressure of the fluid.

As such, as the sludge is concentrated and dehydrated using the pressure of the fluid, the water content of the sludge discharged finally can be expected to be reduced, and the amount of sludge discharged is reduced by decreasing the water content of the sludge. You can expect.

By reducing the amount of sludge discharged, it is possible to expect the effect of preventing the environmental pollution by the treatment of sludge, and to expect the effect of reducing the processing cost for the treatment of sludge, and to save energy for the treatment of sludge You can expect the effect to work.

By lowering the water content of the sludge, it is possible to expect the effect of easy management of the dewatering device, it is possible to expect the effect of reducing the maintenance cost by the operation of the dewatering device and improve the ease of use of the dewatering device.

1 is a perspective view showing the appearance of the high-pressure screw dewatering device according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view showing the casing configuration of the high pressure screw dewatering device according to an embodiment of the present invention.
Figure 3 is a schematic side view showing the casing configuration of the high pressure screw dewatering device according to an embodiment of the present invention.
Figure 4 is an operation showing the operation of the high pressure screw dewatering apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the high-pressure screw dewatering device according to the present invention will be described by way of example.

However, the spirit of the present invention is not limited to the implementation state by the embodiments described below, and those skilled in the art to understand the spirit of the present invention using other embodiments falling within the scope of the same technical spirit It may be easily proposed, but this will also be included in the technical idea of the present invention.

In addition, terms used in the present specification or claims are concepts selected for convenience of description and should be properly interpreted as meanings corresponding to the technical idea of the present invention in grasping the technical contents of the present invention.

1 of the accompanying drawings is a perspective view showing the external appearance of the high pressure screw dewatering device according to an embodiment of the present invention, Figure 2 is a schematic cross-sectional view showing the casing configuration of the high pressure screw dewatering device according to an embodiment of the present invention.

In addition, Figure 3 is a schematic side view showing the casing configuration of the high pressure screw dewatering apparatus according to an embodiment of the present invention, Figure 4 is an operation diagram showing the operation of the high pressure screw dewatering apparatus according to an embodiment of the present invention.

First, referring to Figure 1, the screw-type dewatering apparatus to which the embodiment of the present invention is applied is connected to the coagulation tank 10 for coagulating and stirring the sludge separated from the waste water in the internal space, and the coagulation tank 10 A main body 30 into which the aggregated sludge flows; And a control unit 20 for controlling the coagulation tank 10 and the main body 30.

One side of the agglomeration tank 10 is a sludge service tank (not shown) in which sludge separated from sewage or sewage or wastewater generated in an industrial facility or a general household is introduced and accommodated.

In the internal space of the service tank, the sludge and the inorganic coagulant are agitated to proceed with the first coagulation, and the first coagulated sludge is transferred to the coagulation tank 10 by a transfer pump.

The agglomeration tank 10 is formed to have a predetermined internal space, the internal space is divided into at least three spaces. The three spaces are divided into a flow adjusting tank (not shown) for adjusting the flow rate of the sludge conveyed from the service tank, and a rapid stirring tank for aggregating by stirring the appropriate amount of the sludge with an organic flocculant through the flow adjusting tank ( And a slow stirring tank (not shown) for separating the sludge mixed with the polymer in the rapid stirring bath with water, respectively.

Of course, the flow rate adjustment tank, the rapid stirring tank and the slow stirring tank may be configured in the form of each tank, not the inner space of the cohesion tank 10.

The sludge coagulated in the coagulation tank 10 is transferred to the main body 30, concentrated and dehydrated while passing through the internal space of the main body 30, and discharged to the external space of the main body 30 in the form of a cake. .

One side of the coagulation tank 10 is located a control unit 20 for controlling the operation of the coagulation tank 10 and the main body 30, the control unit 20 is the coagulation tank 10 and the main body ( 30) and a plurality of control components for controlling the operation of the plurality of components.

The agglomeration tank 10 and the main body 30 are directly controlled or automatically controlled by the driver through the control unit 20 to concentrate and dewater the sludge to separate water and cake-type sludge.

2 to 4, the main body 30 includes a casing 31 forming an outer shape, a driving part 32 fixedly mounted to a side surface of the casing 31, and a casing 31. It is provided along the outer surface and comprises a compression unit 40 for compressing the sludge, the casing 31 is formed with a water discharge portion 36 for the discharge of water separated from the sludge.

In addition, a screw 33 for compressing and transporting the sludge is mounted in the inner space of the casing 31 while rotating by the power provided by the driving unit 32.

The casing 31 has a cylindrical shape lying in a substantially horizontal direction while having a predetermined internal space as a whole, and one side provides rotational power of the screw 33 mounted in the internal space of the casing 31. The drive unit 32 is mounted.

The casing 31 has a sludge inlet 311 which provides a passage through which the sludge conveyed from the coagulation tank 10 flows into the inner space, and a passage for discharging the sludge of the concentrated and dehydrated cake form into the outer space. Sludge outlet 312 is provided to provide.

The sludge inlet 311 is formed on the upper surface of the casing 31 of the portion adjacent to the coagulation tank 10, the sludge discharge port 312 is formed in the portion adjacent to the drive unit (32).

A back pressure plate housing 34 is formed between the casing 31 and the driving part 32. The back pressure plate housing 34 is formed in the form of a hexahedron having a predetermined inner space, and the back pressure plate 35 is positioned in the inner space.

Of course, the back pressure plate housing 34 may also be formed in a polyhedral or cylindrical form other than a hexahedron, but the back pressure plate 35 is positioned so that the sludge in the form of cake does not move to another space. It should be configured to have a degree of internal space.

The lower surface of the back pressure plate housing 34 is cut off to have a predetermined area, and the sludge discharge port 312 is provided to provide a passage through which the sludge in the form of cake is discharged to the external space.

The back pressure plate 35 is formed in a disk shape having a predetermined thickness as a whole, the center portion is formed by cutting a predetermined area so that the rotation axis of the screw 33 penetrates.

In addition, the inclined surface is inclined in a direction away from the casing 31 so that the thickness becomes thinner toward the outside from the left side central portion of the back pressure plate (35). The inclined surface of the back pressure plate 35 guides the movement of the sludge in the form of dehydrated and concentrated cake discharged into the inner space of the back pressure plate housing 34.

While the sludge is guided by the inclined surface of the back pressure plate 35, the sludge moves to the inner space of the back pressure plate housing 34, and the sludge is moved to the outer space through the sludge discharge port 312. Is discharged.

The back pressure plate 35 is mounted so as to have a predetermined space as a rim portion while the sludge conveyed by the screw 33 on the left side central part is in close contact with a portion discharged to the side of the casing 31.

As such, the back pressure plate 35 is mounted to be in close contact with the side of the casing 31 so that the sludge is compressed while being transported, and in this process, the sludge is concentrated and converted into a cake shape.

The sludge converted into a cake shape is discharged into the inner space of the back pressure plate housing 34 while being guided by the inclined surface of the back pressure plate 35, and the sludge discharged into the inner space of the back pressure plate housing 34. Through the sludge discharge port 312 is discharged to the external space in the form of a low moisture content.

The back pressure plate housing 34 may be configured to be integrally formed with the casing 31, and may be mounted while being coupled by a fastening member or the like.

The outer surface of the casing 31 is equipped with the compression unit 40 for the compression of the sludge, the water discharge portion 36 for discharging the water separated from the sludge due to the compression of the sludge is formed.

The compression unit 40 is mounted along an outer surface of the upper half of the casing 31 in a circumferential circular shape that intersects the casing 31 and crosses the rotation axis of the screw 33 by the pressure of the fluid. The sludge is compressed while generating a compressive force.

That is, the compression unit 40 is mounted along the outer surface of the upper half of the casing 31, and generates a power by pneumatic or hydraulic pressure to compress the sludge. Detailed description of the compression unit 40 will be described later.

The lower half of the casing 31 is provided with a water discharge portion 36 for discharging the water generated while the sludge is dewatered and concentrated to the outside space. The water discharge part 36 is formed to enable the gap of the space where water is discharged according to the amount of water discharged.

The gap control of the water discharge portion 36 may be formed to control the gap by adjusting the position of the blocking member in the water discharge port, and is also configured to adjust the position of the blocking member by the pressure of the water drained by mounting an elastic body. It will be possible.

In addition, the water discharge portion 36 may be equipped with a wire mesh or a porous network of the mesh form in order to prevent the sludge is discharged to the outer space of the casing 31 with the water. By mounting such a wire mesh or porous network, the sludge may be prevented from leaking out of the casing 31 together with moisture.

Since the wire mesh or the porous network performs a function of preventing the sludge from being discharged to the outer space of the casing 31 together with the moisture, the wire mesh or the porous network may be formed in any form, but the moisture does not pass through the sludge. It must be constructed in such a way that it can pass.

The water discharging unit 36 further includes a washing unit for washing the sludge located in the water discharging unit 36. When the sludge presses the sludge when the sludge pushed out of the screw 33, which will be described later, is deposited on the water discharge part 36, the washing part sprays the washing water to secure a water discharge space and to fix the sludge. It will prevent the function.

The washing unit may be configured in the form of a nozzle in the form of spraying the washing water supplied from the outside, it may be configured in the form of a valve in the form of ejecting the washing water.

By washing the sludge by the washing unit, it is possible to prevent or prevent the clogging of the water discharge unit 36, it has the advantage that the discharge of water is smooth.

Of course, the washing unit may be configured in a form other than the shape of the nozzle or the valve, and may not be formed in the washing unit, but to ensure a smooth space of the water discharge unit 36 by washing the sludge Configurations formed for this will be preferred.

In the inner space of the main body 30, the screw 33 is axially coupled to the driving unit 32 and rotated by the rotational power provided by the driving unit 32. The screw 33 is formed to have a screw blade 331 of the thread form on the outer surface of the cylindrical shape lying in the horizontal direction while having a certain diameter.

The screw 33 has a shape in which the diameter decreases toward the opposite direction from the driving part 32 direction. That is, the diameter of the screw blade 331 is narrowed as the diameter increases toward the sludge discharge port 312 toward the sludge inlet 311.

As such, when the screw blades 331 are formed to have a narrower gap toward the sludge discharge port 312, the sludge is dehydrated while the space in which the sludge is located is narrowed.

In other words, the space in which the sludge is accommodated is gradually reduced by the interval between the screw blades 331 and the rotating shaft of the screw 33, and the sludge is compressed while being transported to dehydrate and concentrate the sludge.

On the other hand, the compression unit 40 is formed in the form of a cylinder and a piston as a whole, relatively to the portion located outside the casing 31 is a power portion that is a cylinder portion for generating power by the pressure of the fluid supplied ( 41) is formed.

In addition, a portion relatively positioned near the outer surface of the casing 31 is formed with a moving portion 42 which is a piston portion that moves by the power provided by the power portion 41.

The movement part 42 is translated by the power provided by the power unit 41 in the direction of intersection with the axis of rotation of the screw 33, in detail in the direction of intersection with the conveying direction of the sludge.

Looking at this in detail, the sludge is moved from the sludge inlet 311 toward the sludge discharge port 312 in a direction parallel to the axis of rotation of the screw 33 by the rotational movement of the screw 33.

The sludge is compressed by the gap between the screw blades 331 and the diameter of the screw 33 tends to move a part in the outward direction of the screw 33.

This is because the space in which the sludge is gradually reduced by the diameter of the screw 33 and the screw blade 331 is to be moved in the outward direction of the screw 33 with relatively less pressing force. There is a tendency.

At this time, the sludge to be moved to the outside of the screw 33 is compressed by a plurality of compression units 40 mounted along a virtual circular outer surface forming the outer diameter of the upper half of the casing 31.

As such, the sludge is further compressed by the compression unit 40 in which the compressive force acts in the direction of movement of the sludge or in the direction of rotation of the screw 33 to further reduce the water content of the sludge. .

As such, the screw 33 compresses the sludge while substantially transporting the sludge by the rotary motion, and condenses and dehydrates the compressing unit 40. As a result, the water content of the sludge can be further reduced.

In this case, the controller 20 controls the rotational movement power of the screw 33 and the translational movement power of the compression unit 40 to control the sludge to be compressed by the power most suitable for the compression of the sludge. do.

On the other hand, the movement portion 42 is the lower end is pressed the sludge to the outside than the imaginary straight line connecting the outer edge portion of the screw blade 331.

This is to prevent breakage of the moving part 42 and the screw wing 331 by preventing contact with the screw wing 331 when the lower end of the moving part 42 is pressed the sludge.

In addition, the compression unit 40 is operated in the process of moving the sludge by the rotational movement of the screw 33, so that the sludge is continuously compressed so that the sludge can be continuously dehydrated, concentrated, and compressed. You have an advantage.

The outer surface of the casing 31 is provided with a compression tube 37 for fixing the compression unit 40 is installed. The compression tube 37 is installed along the outer circumference of the casing 31 to support the compression unit 40 to guide the movement direction of the movement part 42.

Of course, the compression tube 37 is formed to support the compression unit 40 while being formed long in the longitudinal direction of the casing 31, it is fixed to the outer surface of the casing 31 partially It may also be configured to support the compression unit 40.

In addition, the compression unit 40 is capable of measuring and adjusting the compression force applied to the sludge dewatered in the inner space of the casing 31 by generating a power to operate the movement unit 42 by hydraulic or pneumatic pressure. It is configured to.

By controlling the hydraulic pressure or pneumatic pressure supplied to the compression unit 40 by the control unit 20 has the advantage of easy measurement and adjustment of the compression force applied to the sludge.

At this time, the control unit 20 controls to compress the sludge with the most suitable compression force by adjusting the compressive force applied to the sludge according to the amount or state of the sludge, measurement and adjustment of the compressive force applied to the sludge This facilitates dehydration and concentration by compressing the sludge with a suitable compressive force.

As such, it is possible to measure and adjust the compressive force applied to the sludge, which has the advantage of allowing dewatering and concentration of the sludge having a low water content.

The description of the present invention as described above is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains various modifications without departing from the essential characteristics of the present invention. Modifications may be possible.

The screw-type dewatering device according to the present invention is configured to compress the sludge in order to lower the water content of the sludge while the sludge is concentrated and dewatered in the treatment process such as sewage or wastewater.

As the water content of the sludge is lowered by the screw-type dewatering device, the amount of sludge is reduced, and the sludge is easily treated.

In addition, it has the advantage that the cost for treating the sludge is reduced, has the advantage that the consumption of energy for the treatment of the sludge is saved.

Due to these many advantages, the screw-type dewatering device according to the present invention will be highly applicable to not only the production industry of the dewatering device, but also various industries related thereto.

10. Coagulation tank 20. Control unit
30. Body 31. Casing
311. Sludge Inlet 312. Sludge Outlet
32. Drive 33. Screw
331. Screw wing 34. Back pressure plate housing
35. Back pressure plate 36. Water outlet
37. Compression Tube 40. Compression Unit
41. Power unit 42. Exercise unit

Claims (9)

Agglomeration tank for agglomerating sludge in the inner space;
A main body into which the sludge aggregated in connection with the agglomeration tank is introduced; And
A control unit for controlling the coagulation tank and the main body; And,
The main body includes:
A casing having a sludge inlet through which the sludge flows and a sludge discharge port through which the sludge is discharged;
A drive unit fixed to an outer surface of the casing to generate power;
A screw for transferring the sludge from the sludge inlet to the sludge outlet while rotating by the power provided by the driving unit;
A compression unit fixed to the casing and compressing the sludge in a direction crossing with the rotation axis of the screw; And
A water discharge part formed in the casing to discharge moisture from the internal space to the external space; High pressure screw dehydrator configured to include. The method of claim 1,
The compression unit is a high pressure screw dewatering device for compressing the sludge by hydraulic or pneumatic. The method of claim 1,
The compression unit is a high pressure screw dewatering device is mounted on the outer surface of the upper half of the casing along the imaginary circular outer surface formed in the cross direction with the casing. The method of claim 1,
The control unit is a high pressure screw dewatering device for controlling the kinetic power of the screw, and the kinetic power of the compression unit, respectively. The method of claim 1,
The compression unit is a high pressure screw dewatering device in which the adjacent compression unit is mounted on a virtual different straight line parallel to the axis of rotation of the screw. The method of claim 1,
The high pressure screw dewatering device is formed so that the water discharge portion is adjustable to the gap of the area where the water is discharged. The method of claim 1,
The casing is a high pressure screw dewatering device is formed to be connected in series. The method of claim 1,
The casing is a high-pressure screw dewatering device is further formed for the washing portion for cleaning the water discharged portion. The method of claim 1,
The control unit is a high-pressure screw dewatering device capable of measuring and adjusting the compression force applied to the sludge dewatered in the casing.

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