KR102200736B1 - Screw Press For Dehydration of Sludge - Google Patents

Abstract

A screw press for dewatering sludge is disclosed.
The disclosed sludge dewatering screw press improves the existing perforated structure for sludge dewatering and installs a sludge compression control means to prevent clogging of the dewatering holes during sludge dehydration, while increasing the compressive strength according to the inflow amount of sludge. It controls and discharges, and maintains a stable close contact with the inner circumferential surface of the dewatering screen formed of this material by the auxiliary blades made of PE material attached to the main screw so that it can be detached from the main screw. It provides one that enables efficient dewatering while preventing the occurrence of sludge jamming between the two.

Description

Screw Press For Dehydration of Sludge{Screw Press For Dehydration of Sludge}

The present invention relates to a screw press for dewatering sludge used for dehydration of sludge generated in sewage and wastewater treatment plants.In particular, in order to satisfy the moisture content condition of the sludge, the perforated network is improved and the sludge compressive strength can be arbitrarily adjusted. It relates to a screw press for dewatering sludge.

In general, a large amount of sludge is discharged in the process of sewage and wastewater treatment. The sludge generated at this time is to remove moisture contained in the sludge by using a screw press for the purpose of facilitating secondary treatment such as transport and transport, and the screw press used for dewatering of the sludge is published in the following patent documents. Has been.

Patent Document 1 says that it relates to a'food waste dehydration device using a hydraulic press', and'the first compression screw and the second compression screw are continuously arranged inside the housing to squeeze and dehydrate moisture contained in the food waste. 2 The compression guide is fixedly formed on the inlet side of the compression screw, and the pressurization part is formed to move back and forth on the outlet side of the first compression screw, so that when the front and rear compression cylinder moves forward and backward, the pressurization unit advances and compresses the first compression screw and the second. The dehydration efficiency is improved by compressing the food waste existing between the screws to increase dehydration efficiency, and by installing a buffer plate that blocks the outlet of the second compression screw with a constant pressure at the outlet side of the second compression screw.' Is starting,

Patent Document 2 relates to a low-power, low-carbon screw press having a filtration function on a screw shaft that can significantly increase the concentration and dewatering effect of sludge by using a hollow screw shaft having a hole, and the base frame and the base frame One side and the other side support fixedly installed on the upper one side and the other side of the screen, a hollow cylindrical screen chamber fixed at both ends between the one side and the other side support and having a double perforated network structure, installed inside the screen chamber and facing the other end A screw formed of a screw shaft formed to gradually increase its outer diameter and a screw blade spirally formed on the outer circumferential surface of the screw shaft and forcibly rotated by a driving means, a cleaning means positioned outside the screen chamber to clean the screen chamber, and It is installed on the other side support and comprises a pressurizing means for pressing the concentrated sludge while moving toward one side, and the screw shaft is formed in a hollow shape and consists of a perforated network structure, so that the screw shaft is pressed when the sludge is pressed by rotation of the screw shaft. It is characterized in that it is configured so that dehydration can be achieved by injecting and discharging some of the moisture contained in the sludge from the outside.

Patent Document 3 relates to'a screw press for dehydration of a forward and reverse rotation type that can be removed by dehydrating and removing solid matters such as sludge or sediment and impurities with excellent compression, and a dehydration method using the same', and'solid matter such as inflowing sludge Or grit and impurities are conveyed by screw blades attached to the screw shaft rotating forward by the drive motor, and solids such as sludge conveyed by reverse rotation of a cylindrical cylinder using gears, grit and impurities are compressed and squeezed simultaneously. Efficient operation while maintaining a clean environment of the treatment plant by removing the moisture content of solids such as sludge or sedimentation and impurities generated in various treatment plants by dehydration and removing moisture content to reduce volume and moisture to remove spoilage and odor. It is disclosed that it provides an effect that can be used.

However, in the case of the prior art, it is a structure in which moisture contained in sludge is dehydrated through numerous holes in the perforated net. For this reason, in the process of discharging water, the perforated net is frequently clogged by sludge, causing a problem that the moisture content condition cannot be satisfied. In particular, when non-uniform sludge is introduced, the clogging of the perforated net is further aggravated, leading to a factor in reducing the dewatering efficiency of the sludge.

Therefore, there is an urgent need to develop a screw-type press capable of always satisfying the moisture content of sludge without causing clogging of the water dehydration holes by sludge as in the existing perforated net.

KR Patent Publication No. 10-2018-0136626 KR Patent Publication No. 10-2017-0050746 KR Registered Patent No. 10-1187322

The present invention was developed to supplement the problems of the prior art and provide various additional advantages, and by installing a compression strength control means for controlling the compression strength of sludge as well as improving the existing perforated structure for dewatering sludge, sludge It is an object of the present invention to provide a screw press for dehydration that improves dehydration efficiency by adjusting the compressive strength according to the inflow amount of sludge while preventing clogging of the dewatering holes of

The present invention also maintains a frictional state that elastically adheres to the inner circumferential surface of the screen for dehydration by means of auxiliary blades made of PE on the blade portion of the screw, protects the inner circumferential surface of the screen for dehydration and prevents the adhesion of sludge to the inner circumferential surface of the screen. It is an object of the present invention to provide a screw press for dewatering sludge capable of increasing dewatering efficiency.

An object of the present invention is to provide a screw press for dehydration in which the auxiliary blades are detachably attached and thus economical to replace only the auxiliary blades when damaged.

The above object is achieved by the screw press for dehydration provided according to the present invention.

In the screw press for dehydration provided according to an aspect of the present invention, in a screw press that conveys sludge input through an inlet by a screw, and discharges dehydrated sludge through an outlet after dehydration, one side is conveyed by the screw. The sludge conveying part is provided and the other side has the discharge port formed, and by being integrally connected with the sludge conveying part, a dewatering passage of a predetermined length in contact with the sludge conveying part is formed, and the sludge is compressed through the dewatering passage by the conveying screw. In addition, moisture generated by sludge compression is discharged to the outside through long grooves for dehydration formed over the entire length by a plurality of wires installed at regular intervals in the circumferential direction, and dewatered sludge is discharged from the outlet. Dehydration screen unit capable of being discharged through; And a rotating shaft of the screw that is mounted on the outlet side so that the opening degree of the outlet can be adjusted so that the sludge compressive strength can be adjusted according to the input amount of the sludge through the inlet in the dewatering screen. A conical opening and closing port which is loosely coupled to the outlet to allow opening and closing of the discharge unit, a pressurizing cylinder that is fixedly supported at the rear side of the conical opening and closing the conical opening and provides a pressure to control the degree of opening of the conical opening, and the dehydration while forming a state extended from the pressurizing cylinder. It includes a sludge compression control means consisting of a support tool that is pivotally hinged to a support bar fixedly supported on the screen unit and supports the conical opening and closing port in a state of being pressed by a pressure roller.

In another example, the wire has a wedge shape as viewed in cross section, so that a wide portion of the wire is located inside the dewatering screen unit, and a narrow portion is installed to be located outside the dewatering screen unit, and the dehydration The dragon grooves are characterized in that they are configured in a form that widens toward the outside of the dewatering screen.

delete

In another embodiment, an auxiliary blade made of a PE material is attached to the screw of the dewatering screen unit, so that the dewatering screen unit is in elastic frictional contact with the inner circumferential surface of the dewatering screen unit.

In another embodiment, the auxiliary wing made of PE is characterized in that it is detachably attached to the screw as a fastening bolt.

According to the present invention, the compressive strength is adjusted and discharged according to the inflow amount of the sludge while preventing clogging of the dewatering hole during dehydration of sludge, thereby increasing the dewatering efficiency.

In addition, the present invention maintains a frictional state in elastic contact with the inner circumferential surface of the dewatering screen by means of auxiliary blades made of PE material attached to the main screw, so that sludge is attached to the inner circumferential surface of the dewatering screen as well as protecting the dewatering screen. It gives an effect that does not reduce the efficiency.

In addition, the present invention provides the effect of allowing the auxiliary blades to be detachably attached so that only the auxiliary blades can be replaced when damaged.

1 is a plan view of a screw press for dewatering sludge according to the present invention,
2 is a view showing the drive motor is omitted from one side view of FIG. 1,
3 is a cross-sectional view taken along the line II of FIG. 1,
4 is an enlarged view of a portion'A' of FIG. 2,
5 is an enlarged view of part'B' of FIG. 2.

The present invention will be described in detail in the detailed description of the bar, specific embodiments that can be made various changes and can have various embodiments.

However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, and since these may vary according to the intention or custom of users or operators, the definition should be made based on the contents throughout the present specification describing the present invention. .

Hereinafter, a more preferred embodiment of the screw press for dewatering sludge according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view of a screw press for dewatering sludge according to the present invention, and FIG. 2 is a side view of FIG. 1, omitting the driving motor.

As shown in the drawing, the screw press 100 for dewatering sludge according to the present invention is provided with a sludge transfer unit 110 having a sludge inlet 112 for introducing sludge containing a large amount of moisture.

The sludge conveying unit 110 is a sludge conveying pipe 114 that has a substantially U-shape as viewed from a cross section forming a sludge conveying path 113 of a predetermined length, and the sludge conveying pipe 114 inside the sludge conveying pipe 114. ) It is composed of a screw 120 that is axially supported to rotate in the axial direction. The sludge transfer pipe 114 is configured in a state in which all but the sludge inlet 112 is closed, and an opening/closing cover may be installed on the sludge inlet 112.

The sludge containing a large amount of moisture injected through the sludge inlet 112 is transferred to the dewatering screen 130 to be described later by the screw 120. The screw 120 is driven with a driving motor 160 mounted on one side of the sludge transfer pipe 114 by extending the screw shaft 122 to the sludge transfer pipe 114 axially supported. It was able to rotate in connection with the chain 162.

One side of the sludge transfer unit 110, that is, the dewatering screen unit 130 having a substantially cylindrical shape to the right as seen in the drawing, are integrally combined in a state in which they are in contact with each other, and the dewatering screen unit 130 causes the sludge A dewatering passage 132 of a predetermined length to be in contact with the sludge conveying path 113 of the conveying part 110 was formed, and the screw 120 installed in the sludge conveying part 110 also in the dewatering passage 132 ) Is installed to be extended and supported by the shaft so as to be rotated on the base 102 supporting the dehydration passage 132.

Therefore, the sludge transferred from the sludge transfer unit 110 to the dewatering screen unit 130 by the screw 120 is from the dewatering screen unit 130 while passing through the dewatering passage 132 to the screw ( A plurality of wires 133 installed at predetermined intervals d (see Fig. 3) in the circumferential direction of the dewatering screen unit 130 while achieving a state compressed by 120). The dehydration function is discharged to the outside through the long grooves 134 for dehydration provided between, and the dewatered sludge is discharged to the outside through an outlet 135 installed at one side of the dewatering screen unit 130 . A more detailed configuration of the dewatering screen unit 130 will be described later with reference to FIG. 3.

As shown in the figure, sludge compression control means for adjusting the compressive strength of the sludge by the screw 120 for the purpose of increasing the dewatering efficiency of the sludge on the side of the outlet 135 of the dewatering screen unit 130 150 was installed.

The sludge compression control means 150 adjusts the degree of opening of the discharge port 135, and adjusts the sludge compressive strength according to the amount of sludge input through the input port 112 in the dewatering screen unit 130. To be adjustable. The detailed configuration of the sludge compression control means 150 will be described later with reference to FIG. 4.

3 is a sectional view taken along the line I-I of FIG. 1.

As shown in the drawing, the dewatering screen unit 130 forms a wedge shape as viewed in cross section and arranges a wedge-shaped wire member 133 made of a metal material having a predetermined length to form a predetermined gap d in the circumferential direction. This is to form a cylindrical body forming the dewatering passage 132 inside, and the long grooves 134 for dehydration over the entire length of the screen unit 130 for dehydration by the gaps d 1 and 2) were formed.

A wide portion of the wedge-shaped wire member 133 is positioned inside the dewatering screen unit 130, while a narrow portion is installed to be positioned outside the dewatering screen unit 130, so that the long groove for dewatering The fields 134 were made to form a shape gradually widening toward the outside of the dewatering screen unit 130. The reason why the long groove for dewatering 134 is installed along the entire length of the dewatering screen unit 130, that is, along the direction in which the sludge is conveyed and pressurized by the screw 120, is provided by the sludge. It is intended to allow (134) to be provided for dehydration without clogging. It will be understood from the above embodiment that the number and gaps of the wedge-shaped wire members 133 can be modified as much as possible depending on the diameter of the dewatering screen unit 130.

4 is an enlarged view of part'A' of FIG. 2.

As shown in the drawing, the sludge compression control means 150 is loosely coupled to the rotating shaft 122 of the screw 120 to open and close the outlet 135, a conical opening 152 and the opening 152 ) Is fixedly supported on the rear side of the pressurizing cylinder 154 for applying pressure to adjust the opening degree of the opening and closing opening 152, and the pressurizing cylinder 154 extended from the pressurizing cylinder 154 and fixedly supported on the dewatering screen unit 130 It is positioned in a state in contact with the front part of the conical opening 152 while being rotated by the hinge part 156 on the support bar 153 to support the conical opening 152 in a state where it is naturally pressed. Consisting of a shaped support 155, a pressure roller 158 was installed at the lower end of the support 155.

5 is an enlarged view of a portion'B' of FIG. 2.

As shown in the drawing, an auxiliary wing 126 made of polyethylene (PE) is detachably attached to the screw wing 124 of the screw 120 located on the dewatering screen unit 130, and the dewatering screen unit It was configured in a state of elastically frictional contact with the inner peripheral surface of (130) (see Fig. 3). Since the auxiliary wing 126 is formed of a PE material and has a predetermined elastic strength, it is possible to make frictional contact with the inner circumferential surface of the dewatering screen unit 130 while maintaining elasticity, so that the dewatering screen unit While minimizing the abrasion rate of 130, the dewatering sludge does not stick to the inner circumferential surface of the dewatering screen unit 130, and the bolt 127 from the screw blade 124 of the auxiliary wing 126 Detachable coupling by the like makes it easy to replace and maintain the screw wing (124).

An example of the operation of the present invention having such a configuration will be described again with reference to the drawings.

The sludge that is fed into the sludge transfer path 113 of the sludge transfer unit 110 through the sludge inlet 112 is driven by the driving force transmitted from the drive motor 160 through the rolling chain 162 to the screw 120. I made it possible to rotate.

The rotation of the screw 120 is continuously transferred to the dewatering screen unit 130 in contact with the sludge transfer path 113 through the sludge transfer path 113 while the sludge is input.

The sludge transferred to the dewatering screen unit 130 side is passed through the dewatering passage 132 by the screw 120 extended to the dewatering passage 132 of the dewatering screen unit 130. The sludge is transferred toward the discharge port 135, and the sludge transferred to the discharge port 135 along the dewatering passage 132 is closed in an almost closed state by the opening and closing port 152. Is strongly compressed by the screw 120 inside the dewatering screen part 130.

Moisture generated by the squeezing of the sludge performs a dehydration function that is quickly discharged to the outside through the long grooves 134 for dehydration provided by the wedge-shaped wire members 133 of the dewatering screen unit 130. In particular, the long grooves 134 for dehydration have a structure that extends toward the outside of the dewatering screen unit 130 while being formed to be long in the direction of the sludge.

Therefore, unlike the conventional sludge that prevents the dehydration hole when water is discharged by the dehydration hole perforated in a circular shape, or it is difficult to maintain the moisture content of the sludge due to the discharge of the sludge before dehydration, even if the sludge has non-uniform particles Without being discharged as it is through the long grooves 134 for dewatering, while being pressurized by the screw 120, it forms a long open state in the direction of progression of the sludge, and goes smoothly without being clogged along the long grooves for dewatering 134 formed. It is possible to increase the efficiency of dewatering of the sludge by allowing moisture to be discharged.

The control of the moisture content of the sludge in the dewatering screen unit 130 may be arbitrarily adjusted by adjusting the opening degree of the discharge port 135 by the opening 152 of the sludge compression control means 150. For example, when the amount of sludge input through the inlet 112 is small, the opening 152 is positioned in the solid line state of FIG. 4 to maintain the state in which the outlet 135 is substantially closed. The water content of sludge can be adjusted while maintaining high compressive strength of sludge by

Conversely, when the amount of sludge input is large, the opening 152 is moved to the virtual line state of FIG. 4 to allow the outlet 135 to be opened, so that the sludge moisture content can be adjusted while maintaining the compressive strength of the sludge by the screw 120 low. I can.

Since the conical opening 152 of the sludge compression control means 150 is loosely coupled to the rotational shaft 122 of the screw 120, the rotational shaft 122 is irrespective of the rotation of the screw 120 While moving, the degree of opening of the outlet 135 can be adjusted. The movement of the conical opening 152 toward the outlet 135 is extended from the pressing cylinder 154 while being bent at a predetermined angle, so that the pressing roller 158 is formed on the front surface of the conical opening 152 It is achieved by the support tool 155 placed in a contacted state.

In positioning the conical opening 152 to be spaced apart from the outlet 135, the pressing roller 158 of the support 155 for applying a pressing force to the conical opening 152 is positioned in the virtual line of FIG. To be separated from the conical opening 152, this operation is performed by the operation of the pressure cylinder 154.

For example, when the pressurizing cylinder 154 is operated forward, the pressurizing cylinder 154 pushes the hinge portion 156 of the support bar 153 to the support point and rotates the conical opening and closing opening. The pressure roller 158 at the lower end of the support tool 155 that was pressing 152 is moved to the virtual line position of FIG. 4 by moving it away from the conical opening/closing port 152, and pressing force from the pressure cylinder 154 The released conical opening 152 is moved along the rotation axis 122 of the screw 120 by the pressing force of the sludge proceeded by the screw by the distance the pressure roller 158 of the support tool 155 has moved. Thus, the open state of the discharge port 135 is maintained, and the opening degree of the discharge port 135 can be arbitrarily adjusted according to the movement of the conical opening/closing port 152 according to the forward movement amount of the pressurizing cylinder 154.

Unlike the opening of the outlet 135, when the conical opening 152 is moved to the solid line position shown in FIG. 4 to close the outlet 135, the pressure cylinder 154 is operated backward Thus, the pressure roller 158 side of the support 155 pushes the conical opening 152 toward the outlet 135 along the rotation shaft 122 to move it to the solid line position of FIG. 4.
Meanwhile, the sludge obtained by dehydrating water while passing through the dewatering screen unit 130 may be smoothly discharged through the discharge port 135 which is opened according to the movement of the conical opening 152.

On the other hand, the screw 120 for directly performing water dehydration of the sludge in the dewatering screen unit 130 is a PE auxiliary blade 126 installed on the screw blade 124 is the dewatering screen unit ( The screw 120 compresses the sludge with high strength by frictional contact that makes the inner circumferential surface of 130) elastically close to the inner circumferential surface of the screen unit 130 for dewatering while improving the dewatering efficiency of the sludge. It gives the benefit of eliminating the problems that cling to wealth.

Since the detachable mounting of the auxiliary blade 126 made of PE material to the screw wing 124 only needs to be replaced with the auxiliary wing 126 made of PE material when damaged, the entire screw can be removed from wear due to the direct contact of the conventional screw with the spinneret. It also provides benefits that reduce economic losses that must be replaced with new ones.

The present invention can be usefully applied to a screw press used to dewater sludge.

100: screw press for sludge dewatering
110: sludge transfer unit
120: screw
126: auxiliary wing made of PE material
130: screen for dehydration
132: dehydration passage
133: wedge type wire member
134: long groove for dehydration
135: outlet
150: sludge compression control means
152: conical opening
153: support bar
154: pressure cylinder
155: support ball
158: pressure roller
160: drive motor

Claims (5)

In a screw press in which the sludge input through the inlet is conveyed by a screw and the dehydrated sludge is discharged through the outlet after dehydration,
One side is provided with a sludge conveying part conveyed by the screw, and the other side forms a dewatering passage having a predetermined length in contact with the sludge conveying part by being integrally connected with the sludge conveying part and having the outlet formed therein, and the dewatering passage by the screw In addition to allowing the sludge to be transported in a compressed state through the circumferential direction, moisture generated by sludge compression is transmitted through long grooves for dehydration formed over the entire length by a plurality of wire members installed at regular intervals in the circumferential direction. A screen unit for dewatering that is drained to the outside and allows the dewatered sludge to be discharged through the outlet; And
It is mounted on the outlet side so that the opening degree of the outlet can be adjusted, so that the compression strength of the sludge can be adjusted according to the input amount of the sludge through the inlet in the dewatering screen unit. A conical opening and closing port which is loosely coupled to allow opening and closing of the outlet, a pressure cylinder fixedly supported at the rear side of the conical opening and closing port to provide a pressure to control the degree of opening of the conical opening, and a pressure cylinder extending from the pressure cylinder for dehydration. Sludge compression control means consisting of a support tool that is pivotally hinged to a support bar fixedly supported on the screen and supports the conical opening and closing port in a state of being pressed by a pressure roller; Screw press for sludge dewatering comprising a. The method of claim 1,
The wire member has a wedge shape as viewed in cross section so that a wide portion of the wire is located inside the dewatering screen portion, and a narrow portion is installed to be positioned outside the dewatering screen portion, and the long grooves for dewatering are A screw press for dewatering sludge, characterized in that it is configured to be widened toward the outside of the screen for dewatering. delete The method of claim 1,
A screw press for dewatering sludge, characterized in that, by attaching auxiliary blades of PE material to the screw of the dewatering screen unit, elastically frictionally contact with the inner circumferential surface of the dewatering screen unit. The method of claim 4,
A screw press for dewatering sludge, characterized in that the auxiliary blade of the PE material is detachably attached to the screw with a fastening bolt.

Images