KR102267921B1 - Sludge dewatering device with forced discharge structure of cake - Google Patents

Abstract

An objective of the present invention is a sludge dehydrator with a forced discharge structure of a cake which is configured in a screw press scheme having a shaftless screw section, rotatively supports an end of a shaftless blade to prevent the shaftless blade from being bent using a bearing, configures a filter of a shaftless screw section to have a reverse slope structure and configures a shaftless blade to have a steep slope so that a cake having low moisture is generated by applying force acting a slude toward a center to make an exhaust direciton of moisture contained in the sludge to be different from a direction of force applied to the sludge which results in exhausting moisture through a filter, and eaisly exhaust the cake and accordingly easily dehydrates the cake, and improves moisture content by crushing a cake of low moisture to exhaust the cake to an outside by force using an empty space formed due to a shaftless screw section through a phenomenon difficult to exhaust due to reduced liquidity of the cake having low moisture. The sludge dehydrator with a forced discharge structure of a cake comprises: a cylinder having a structure to exhaused moisture included in a sludge; a screw installed along a center axis of the cylinder and moving along the sludge to press and hydrate the cake; a motor installed at one side of the screw to provide power for driving the screw; and a forced cake exhausting means installed at another side of the screw facing the motor for crusing the hydrated cake to exhause the cake outward of the cylinder.

Description

Sludge dewatering device with forced discharge structure of cake

The present invention relates to a sludge dewatering device, and more particularly, by crushing the cake moving toward the outlet after dewatering in a screw press method, and then forcibly discharging the cake to the outside, the sludge dewatering having a forced discharge structure of the cake that enables smooth discharge of the cake It's about the device.

The amount of wastewater is increasing rapidly every year. As a result, the pollution problem of the surrounding environment has been seriously raised, and various efforts are being made to effectively treat the wastewater accordingly. That is, various technologies for a sludge dewatering device that dehydrates the moisture contained in the sludge to make a cake have been developed.

On the other hand, in recent years, a sludge dewatering device that dehydrates the moisture contained in the sludge by a screw press method and makes a cake is the mainstream, and the sludge dewatering apparatus of this screw press method has also been improved to have more improved dewatering efficiency. That is, in the past, the cylinder was composed of a screen in the form of a perforated network, and the moisture contained in the sludge was discharged to the outside through the holes of the screen. More specifically, it was configured so that moisture contained in the sludge was discharged to the outside through a hole in the screen by a screw that was installed along the central axis of the cylinder and pressed while moving the sludge.

However, this screen type sludge dewatering device has a structure in which the sludge is moved while the screw is rotated and the moisture contained in the sludge is discharged to the outside through the hole of the fixed screen. That is, in the screen type sludge dewatering device, as the screen has a fixed shape, the sludge attached to the screen is not cleaned smoothly in the process of water separation, causing a decrease in the drainage effect, thereby lowering the dewatering efficiency. there was

In order to compensate for the above problems, it has been improved to a lamination type sludge dewatering device in which a cylinder is repeatedly laminated alternately so that a plurality of ring-shaped fixed disks and movable disks have a gap therebetween. This lamination type sludge dewatering device is installed along the central axis of the cylinder, and the movable disk moves simultaneously with the rotation of the pressing screw while moving the sludge, and the moisture contained in the sludge is discharged through the gap between the fixed disk and the movable disk. It is configured to self-clean the sludge attached to the gap.

On the other hand, the screen type and lamination type sludge dewatering device as described above is installed along the central axis of a cylinder and uses a screw that compresses the sludge while moving the sludge to remove the moisture contained in the sludge through the hole in the screen or the gap between the fixed disk and the movable disk. It is designed to be discharged to the outside through Here, the screw is composed of a drive shaft installed along the central axis of the cylinder, and a screw blade coupled along the circumference of the drive shaft. That is, the conventional screw is configured such that the drive shaft and the screw blade are integrally configured to rotate together.

On the other hand, the initial screw used a drive shaft having the same diameter in the longitudinal direction of the cylinder as shown in FIG. 1 . However, in the case of a screw having a drive shaft of the same diameter, as the moisture content in the sludge decreases as it progresses from the front end of the cylinder into which the moisture-containing sludge is input to the rear end where the cake is discharged, the drive shaft has the same diameter as the drive shaft. In the part, the moisture content was lower than that of the surrounding area, so it was discharged better as it moved away from the center of the cylinder due to reduced fluidity, and there was a problem in that the sludge was continuously attached to the surface of the drive shaft or the blade of the screw and accumulated inside.

More specifically, since the cake is discharged from the end of the back pressure plate, the sludge near the center continuously accumulates and the moisture content decreases, while the sludge at the far part from the center has a continuously high moisture content. is emitted as As a result, the sludge on the central shaft (drive shaft) accumulates and the moisture content decreases and discharge is not smooth, so the effective area of dewatering decreases, and the sludge in the part far from the central shaft is discharged to a situation where the moisture content increases due to the decrease in the effective area of dewatering. As this progresses, there is a structural problem in which it is difficult to discharge the cake.

So, as shown in FIG. 2, the screw was configured to have a tapered drive shaft whose diameter gradually increased toward the outlet of the cake. By the way, even in the case of a screw having a tapered drive shaft, it is less than a screw having a drive shaft of the same diameter, but as sludge is attached to the surface of the drive shaft or the blade of the screw and accumulates, the moisture content is lowered, so there was the same problem as a screw without a taper. . That is, as the sludge could not be transferred and discharged in a state in which the sludge was completely filled inside the sludge dewatering device, there was a problem in that the sludge was accumulated as described above.

On the other hand, in the structure as shown in FIG. 2, the direction of the force received by the sludge during compression transfer and the direction in which the compression liquid that is squeezed out of the sludge is discharged is the same, so that the moisture content of the cake is not good, and in the case of sludge that is easy to squeeze There was a problem in that the moisture content of the discharged cake was severely varied due to poor discharge of the compressed liquid. In addition, when the rotation speed of the screw is increased to increase the throughput of the sludge as the sludge is not transported and discharged in a state where the sludge is completely filled inside the sludge dewatering device due to fluidity deviation, the compressed liquid compressed in the rotation direction of the screw is caused by gravity There was a problem in that it was difficult to treat the sludge due to the high moisture content of the discharged cake as the screw progressed forward before being automatically discharged.

To solve this problem, in the classical screw press method, the distance between the back pressure plate and the back pressure plate is widened by reversing the screw or by widening the gap between the back pressure plate at the part where the cake is discharged, and the moisture content of the cake, which is an environment in which the sludge in the center is well discharged, is increased. When the cake is discharged smoothly, a solution was sought by reducing the gap between the back pressure plate. However, this is a method outside the purpose of improving the moisture content, which is the original purpose of the dehydrator, and it is not an accurate method to solve as a temporary method in the dehydrator, which is the purpose of obtaining a low moisture cake.

Thus, in order to essentially improve the above problems, that is, cake and smooth discharge of low moisture, Korean Patent Application Publication No. 2016-0143520, filed by the present applicant, discloses a sludge dewatering device having a main shaft and a shaftless screw section. As shown in Figure 3, the sludge dewatering device of this patent is to dehydrate the water contained in the sludge to make a cake, and the screw is composed of a main shaft and a shaftless screw section. That is, the first half side to which the sludge is supplied is composed of a main shaft screw section, and the second half side where the sludge is discharged in the form of a cake is composed of a shaftless screw section. As such, this patent discloses that the first half is composed of the main shaft screw section to effectively dewater while transferring the water contained in the sludge, and the second half is composed of the shaftless screw section so that the sludge does not adhere to the surface of the shaft and the blades of the screw smoothly. It is designed so that it can be discharged.

On the other hand, as shown in Figure 3, the sludge is gradually compressed while being transported in the A1 ~ A3 direction by the first motor (M1), from the A2 position is about to be fixed. Therefore, in this publication, by rotating the second motor (M2) in the opposite direction to the first motor (M1) in the shaftless screw section, which is the section in which the sludge is to be fixed, the sludge is not adhered to the surface of the shaft and the blades of the screw. It is configured to be transferred toward the outlet of the cake.

However, when the present applicant manufactured and operated the sludge dewatering device of Patent Publication No. 2016-0143520, there was an efficiency in treating sludge without a change in moisture content, but there were several problems. That is, as the blade of the screw in the shaftless screw section has a free end structure, a lot of force is added to the bending of the screw blade, and corrosion occurs due to the difficulty in sealing the bearing installed at the connection part between the main shaft and the shaftless screw section. and sagging. In addition, as the structure using the pressure inside the dehydrator is adopted, foreign substances such as hair are sequentially caught in a plurality of holes formed at the end for discharging the sludge, and the pressure is not uniform, causing some clogging at some outlets. When this elapses, there is a problem in that the hole is blocked, and the low moisture cake in the vicinity of the discharge port has a problem in that the moisture is reduced and the fluidity is lowered and clogging occurs.

On the other hand, in the conventional screw press method, the fluidity of the dehydrated cake is reduced due to the decrease in the moisture content during dehydration, and the clogging phenomenon occurs due to the sludge. In order to prevent this, the force applied to the sludge is configured to face the direction of the dewatering filtration surface. . Therefore, in the dehydrator whose purpose is to reduce the moisture content, the direction of the force applied to the sludge and the discharge direction of the water contained in the sludge are the same due to the decrease in the fluidity of the cake, so there is a limit to improving the moisture content.

Patent Registration No. 10-0978040 (Registration Date: 2010.08.19.) Patent Publication No. 2016-0143520 (published date: 2016.12.14.)

Therefore, this invention was developed to solve the problems of the prior art as described above, and is configured in a screw press method having a shaftless screw section, but using a bearing at the end of the shaftless blade so that bending does not occur in the shaftless blade It is supported rotatably, and the filter part of the shaftless screw section has a reverse inclined structure, and the shaftless blade is made up of a steep incline so that the force acting on the sludge is directed toward the center and acts on the discharge direction of the water contained in the sludge and the sludge. By discharging the water through the filtration unit by changing the direction of the force, a cake of lower moisture is created, and the phenomenon of difficulty in discharging due to the deterioration of the fluidity of the cake of low moisture is eliminated by the hollow space formed by the shaftless screw section. An object of the present invention is to provide a sludge dewatering device having a cake forced discharge structure that crushes a low moisture cake using a sludge and then forcibly discharges the cake to the outside, thereby enabling smooth discharge of the cake and thereby smooth dehydration and improvement of moisture content.

The sludge dewatering device of this invention for achieving the above object includes a cylinder having a structure in which water contained in the sludge is discharged, and a screw installed along the central axis of the cylinder for dewatering by pressing while moving the sludge; A motor installed on one side of the screw to provide power to drive the screw, and a cake forced discharge means installed on the other side of the screw opposite to the motor to crush the dehydrated cake and forcibly discharge it to the outside of the cylinder and the cylinder is configured to have an inner diameter gradually decreasing from the vicinity of the outlet side of the cylinder, and the screw includes a shaft installed along the central axis of the cylinder, and a blade integrally coupled along the periphery of the shaft, The shaft is configured with the same diameter and extends only to a certain length of the cylinder in a state in which one side is coupled to the motor and rotatably supported, and the other side has the form of a free end, and the blade extends to the free end of the shaft. It has the form of a main shaft section integrally coupled to the shaft at an inclination angle of 3 to 4° forward with respect to the vertical direction of the surface, and thereafter, it is axisless at an inclination angle of 15 to 35° forward with respect to the vertical direction of the shaft surface. The end of the shaftless blade is rotatably supported on the cylindrical frame by a bearing in a state in which it is further extended in the form of a section, and the cake force discharging means is an empty space in the axial direction formed by the shaftless blade. A crushing means for crushing the dehydrated cake filled in the empty space while rotating and moving forward and backward along the , and discharge for discharging the crushed cake to the outside of the cylinder while rotating and moving forward and backward along the inside and the empty space of the crushing means A drill comprising a means, wherein the crushing means is formed to have a gear structure on the outer surface while being of a hollow type with front and rear ends open, and crushing the dehydrated cake filled in the empty space while rotating and moving forward and backward along the empty space A member and a structure engaged with the gear of the drill member while being disposed in a shape surrounding the periphery of the drill member a first power transmission gear having a, and a first motor for providing power to the first power transmission gear, wherein the discharge means is on the outer surface of the support member for supporting the shaftless screw blade and the shaftless screw blade. A screw member formed to have a gear structure and discharging the crushed cake from the empty space to the outside of the cylinder while rotating and moving forward and backward along the inside and the empty space of the drill member, and a shape surrounding the circumference of the support member and a second power transmission gear having a structure engaged with the gear of the support member while being disposed, and a second motor providing power to the second power transmission gear.

In addition, according to this invention, the cylinder is a multilayered cylinder constructed by alternately repeatedly stacking a plurality of ring-shaped fixed disks and movable disks to have a gap therebetween, and is formed continuously on one side of the laminated cylinder and is formed in a perforated network form. It is preferable to include a screen-type cylinder composed of a screen, wherein the screen-type cylinder has an inner diameter gradually decreasing toward the outlet located at the end of the screen-type cylinder.

In addition, according to this invention, it is preferable that the cylinder is entirely composed of a screen in the form of a perforated network.

In addition, according to this invention, the blade has a thickness within the main shaft section of 7mm, it is more preferable that the shaftless section has a thickness of 20-25mm.

The sludge dewatering device of this invention is configured in a screw press method having a shaftless screw section, but rotatably supports the end of the shaftless blade using a bearing so that bending does not occur in the shaftless blade, and the filtration part of the shaftless screw section is reversely inclined In addition to the structure, the shaftless blades are configured with a steep slope so that the force acting on the sludge is directed toward the center, and the direction of discharging water contained in the sludge and the direction of the force acting on the sludge are different from each other, and the water is discharged through the filter unit. By doing this, a cake of low moisture is created, and the phenomenon that it becomes difficult to discharge due to the decrease in fluidity of the cake of low moisture is crushed using the empty space formed by the shaftless screw section and then forced to the outside. This has the advantage of enabling smooth discharge of the cake and thus smooth dehydration and improvement of moisture content.

Specifically, the sludge dewatering device of this invention crushes the cake moving toward the outlet of the cylinder using the cake forced discharge means and then forcibly discharges the cake to the outside of the cylinder, so that the cake can be smoothly discharged, thereby enabling the efficient sludge dewatering device. work is possible That is, because the cake is not accumulated by being attached to the shaft and/or blade due to the smooth discharge of the cake, it is possible to smoothly operate the sludge dewatering device capable of low moisture content.

In addition, the sludge dewatering device of the present invention forms an empty space for crushing the dewatered cake and forcibly discharging it to the outside through a shaftless blade, and rotatably supports the shaftless blade on the inside of the frame using a bearing. By adopting , it is possible to dewater the sludge through the screw in a stable state and to discharge the cake smoothly through the cake forced discharge means.

In addition, the sludge dewatering device of this invention consists of a shaftless blade at an inclination angle of approximately 15 to 35° forward with respect to the vertical direction of the shaft, and crushes and discharges the dehydrated cake while collecting it inside the empty space, so that the cake is discharged smoothly This is possible.

In addition, the sludge dewatering device of this invention is configured to separately drive the crushing means and the discharging means constituting the cake forced discharge means, so that efficient discharge of the cake through the selective driving of the crushing means and the discharging means in consideration of the moisture content of the dehydrated cake is possible. It is possible.

1 and 2 are conceptual views of a general sludge dewatering device,
3 is a conceptual diagram of a sludge dewatering device having a main shaft and a shaftless screw section according to the prior art;
Figure 4 is a schematic diagram showing the configuration of the sludge dewatering device having a forced discharge structure of the cake according to an embodiment of the present invention,
5a to 5c are operational state diagrams illustrating the process of forcibly crushing and discharging cakes in the sludge dewatering device shown in FIG. 4;
Figure 6 is a schematic diagram showing the configuration of the sludge dewatering device having a forced discharge structure of the cake according to another embodiment of the present invention,
7a to 7c are operational state diagrams illustrating the process of forcibly crushing and discharging the cake in the sludge dewatering device shown in FIG. 6 .

This invention is applicable to all sludge dewatering devices of the screw press method. That is, it is applicable to both the screen type and the lamination type sludge dewatering device as described above. Accordingly, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only this embodiment completely conveys the scope of the invention to those of ordinary skill in the art so that the disclosure of this invention is complete. It is provided to inform you.

4 is a schematic diagram showing the configuration of a sludge dewatering device having a structure for forced discharge of cakes according to an embodiment of the present invention, and FIGS. 5a to 5c are forcibly crushing the cake in the sludge dewatering device shown in FIG. It is an operation state diagram showing the discharging process.

4 to 5c, the sludge dewatering device 10 according to this embodiment dehydrates the water contained in the sludge to make a cake, and includes a plurality of fixed disks 110 and movable disks 120. A laminated cylinder 100 constructed by alternately and repeatedly laminated to have a gap therebetween, a screen type cylinder 150 continuously formed on one side of the laminated cylinder 100 and having a perforated network shape, and cylinders 100 and 150 A screw 200 installed along the central axis of the sludge to dehydrate the sludge by pressing while moving the sludge, and a plurality of movable disks 120 receiving the power of the screw 200 are rotated simultaneously with respect to the fixed disk 110 to close the gap. A turning bar 300 to remove moisture through, a motor 400 that is installed on one side of the screw 200 to provide power to drive the screw 200, and a screw opposite to the motor 400 ( It is installed on the other side of the 200) is configured to include a cake forced discharge means 500 for forcibly discharging to the outside by crushing the dehydrated cake.

The stacked cylinder 100 is configured by alternately and repeatedly stacking a plurality of fixed disks 110 and movable disks 120 to have a gap therebetween, and the gap is fixed between a plurality of fixed disks 110 . formed by spacers (not shown). That is, by configuring the spacer to be thicker than the thickness of the movable disk 120 , a gap is formed between the plurality of fixed disks 110 and the movable disk 120 , respectively. Meanwhile, the plurality of fixed disks 110 and the spacers may be integrally fixed with a fixing bar or the like.

The screen-type cylinder 150 is continuously formed on one side of the stacked-type cylinder 100 and has a perforated network shape. This screen-type cylinder 150 has a tapered shape (reverse inclination structure) in which the inner diameter is gradually decreased toward the outlet located at the end thereof. This is to create a situation in which the inside of the screen-type cylinder 150 is filled with more sludge so that the sludge is compressed more efficiently and then discharged more smoothly.

On the other hand, the screen-type cylinder 150 is formed of a case having a predetermined length with holes of a predetermined size are formed at equal intervals, and a screen installed on the inner surface of the case and having fine holes. The hole in the screen serves as an outlet through which water contained in the sludge escapes to the outside of the screen-type cylinder 150 .

The screw 200 is installed along the central axis of the cylinders 100 and 150 to dehydrate the sludge by pressing while moving the sludge. The shaft 210 and the shaft 210 are installed along the central axis of the stacked cylinder 100. ) is integrally coupled along the circumference of the blade 220 to dehydrate the sludge by pressing while transporting the sludge. Here, the shaft 210 is configured to have the same diameter and is arranged in a horizontal state, and one side is coupled to the motor 400 and extended only to the stacked cylinder 100 in a rotatably supported state, and the other side has the form of a free end. have That is, the shaft 210 has the form of a free end at the outlet side from which the dehydrated cake is discharged, and extends only to a position where some components of the cake forced discharging means 500 can provide a space to move in the axial direction. have a form

The blade 220 integrally coupled along the periphery of the shaft 210 as described above is installed. At this time, the blade 220 is installed in a form that is further extended past the free end of the shaft 210 . That is, the blade 220 has a form integrally coupled with the shaft 210 until the portion where the shaft 210 is located, and thereafter is disposed in a shaftless form. Specifically, in the section in which the screen-type cylinder 150 is located, it has an axisless shape. Therefore, an empty space is formed in the axial direction in the portion where the shaftless blade 220 is located, and along this empty space, some components of the cake forced discharging means 500 move while making the dehydrated cake filled in the empty space. It is crushed and forcibly discharged to the outside of the screen-type cylinder 150 .

On the other hand, the blade 220 is efficiently dehydrated by configuring an inclination angle of approximately 3 to 4° forward with respect to the vertical direction of the surface of the shaft 210 until the part integrally coupled with the shaft 210, and in the shaftless section, the shaft It is preferable to configure the dehydrated cake to gather inside the empty space by configuring an inclination angle of approximately 15 to 35° toward the front with respect to the vertical direction of the surface of the 210 . In configuring the blade 220 of the shaftless section in this way, as confirmed through simulation, when the inclination angle is less than 15°, the effect of gathering the cake inside the center is insignificant, and when configured with an inclination angle of more than 35° There was a problem in that too much force was applied to the inside of the center, acting on the blade 220 . Therefore, it was confirmed that the blade of the shaftless section is preferably configured with an inclination angle of 15 to 35°.

The sludge dewatering device 10 of this embodiment comprises the filtration part (screen-type cylinder 150) of the shaftless screw (blade) section in a reverse inclination structure, and the shaftless blade is configured at an inclination angle of 15 to 35° to sludge By directing the force acting on the sludge to the center, the direction of discharging the water contained in the sludge and the direction of the force acting on the sludge are different from each other, and the water is discharged through the filtering unit (screen hole of the screen-type cylinder 150) to further reduce Can create watery cakes.

On the other hand, the screw 200 is not structurally stable as the shaft 210 has a free end structure and the blade 220 has a structure that extends further in a shaftless form past the free end of the shaft 210 . Accordingly, the screw 200 of this embodiment is configured to rotatably support the shaftless blade 220 in a frame or the like. That is, the shaftless blade 220 is rotatably supported on the inside of the frame using a bearing.

In general, the blade 220 integrally coupled to the shaft 210 has a thickness of about 7 mm or less. By the way, as the blade 220 of this embodiment has a shaft-free section that is integrated with the shaft 210 and a shaft-free section without the shaft 210, the main shaft section has a thickness of about 7 mm or less, the same as a general screw, whereas , it is preferable that the shaft-free section has a thickness of about 20 to 25 mm. That is, since the shaft-free section has to dehydrate the water contained in the sludge in the absence of the shaft 210, it is efficient to configure it with a relatively thick thickness. There is a risk of warpage, and when it exceeds 25 mm, there is a problem in that the driving load is gradually increased. Therefore, it was confirmed that it is preferable to configure the blade in the shaftless section with a thickness of about 20 to 25 mm.

In general, in integrating the blade 200 with the shaft 210, the fragments of the blade 200 are welded to be positioned on the periphery of the shaft 210, and then the blade 200 is pulled with the equipment to have a predetermined pitch interval. It was integrated by welding to the shaft 210 in the adjusted state. However, since the blade 200 of the shaftless section of this embodiment is thick, it has to be cut by lathe work.

The turning bar 300 is provided with the power of the screw 200 to simultaneously rotate the plurality of movable disks 120 with respect to the fixed disk 110, and for this purpose, the shaft 210 of the screw 200 is interlocked. It has a connected structure. On the other hand, the turning bar 300 may be configured by adopting a separate power and a turning mechanism other than the power of the screw 200 as disclosed in Korean Patent Application Laid-Open No. 2016-0143520.

The cake forced discharging means 500 constitutes the filtration part (screen-type cylinder 150) of the shaftless screw (blade) section in a reverse inclined structure, and as well as configuring the shaftless blade at an inclination angle of 15 to 35°, It creates more and more low moisture cakes, and thereby serves to solve the problem of difficulty in discharging due to the reduced fluidity of the low moisture cake. That is, the cake forced discharging means 500 is installed on the other side of the screw 200 facing the motor 400 to crush the dehydrated cake and forcibly discharge it to the outside, and the empty formed by the shaftless blade 220 . The crushing means 510 for crushing the dehydrated cake filled in the empty space while rotating and moving forward and backward along the space, and the inside of the crushing means 510 and the cake crushed while rotating and moving forward and backward along the empty space are screen-type Consists of a discharge means 520 for discharging to the outside of the cylinder (150).

The crushing means 510 has a structure that rotates and moves forward and backward by receiving power from a motor, which is a driving source, and is hollow and is formed to have a gear structure on the outer surface so as to rotate and move forward and backward along the empty space while filling the empty space. is a drill member 511 for crushing the dehydrated cake, a first power transmission gear 512 having a structure engaged with the gear of the drill member 511 while being disposed in a shape surrounding the periphery of the drill member 511, and a second 1 is composed of a first motor 513 that provides power to the power transmission gear 512 .

The drill member 511 is a hollow type in which the front end and the rear end are open, but the front end and the adjacent edge portion have a blade structure capable of crushing the cake. In addition, the drill member 511 has a gear structure capable of rotating and moving forward and backward on the outer surface. Accordingly, the drill member 511 crushes the dehydrated cake filled in the empty space while rotating and moving forward and backward.

The first power transmission gear 512 has a shape surrounding the circumference of the drill member 511 and a gear structure that meshes with the gear of the drill member 511 on the inside. On the other hand, the first power transmission gear 512 has a gear structure that transmits power so that the drill member 511 rotates and moves forward and backward while rotating in place by the power provided from the first motor 513 .

Accordingly, when power is supplied from the first motor 513, the crushing means 510 transmits power to the drill member 511 while the first power transmission gear 512 rotates in place, and then the drill member 511. It is to crush the dehydrated cake filled in the empty space while rotating and moving forward and backward.

The discharging means 520 discharges the cake crushed by the crushing means 510 to the outside of the screen-type cylinder 150, and supports the non-axis screw blades 521a and the shaftless screw blades 521a. A screw member formed to have a gear structure on the outer surface of the member 521b and discharging the crushed cake from the empty space to the outside of the stacked cylinder 100 while rotating and moving forward and backward along the inside and the empty space of the drill member 511 521 and a second power transmission gear 522 having a structure that is engaged with the gear of the support member 521b while being disposed in a shape surrounding the support member 521b of the screw member 521, and a second power transmission gear and a second motor 523 that provides power to 522 .

The screw member 521 has a shaftless screw blade 521a of a structure capable of smoothly discharging the crushed cake to the outside of the screen-type cylinder 150 in the empty space. In addition, the screw member 521 has a gear structure capable of rotating and moving forward and backward on the outer surface of the support member 521b. Accordingly, the screw member 521 can smoothly discharge the crushed cake from the empty space to the outside of the screen-type cylinder 150 while rotating and moving forward and backward along the inside and the empty space of the drill member 511 .

The second power transmission gear 522 has a shape surrounding the support member 521b of the screw member 521 and a gear structure that meshes with the gear of the support member 521b on the inside. Meanwhile, the second power transmission gear 522 has a gear structure that transmits power so that the screw member 521 rotates and moves forward and backward while rotating in place by the power provided from the second motor 523 .

Accordingly, when power is supplied from the second motor 523, the discharge means 520 transmits power to the screw member 521 while the second power transmission gear 522 rotates in place, and then the screw member 521. While rotating and moving forward and backward, the crushed cake is discharged from the empty space to the outside of the screen-type cylinder 150 .

As described above, the cake forced discharging means 500 is configured such that the crushing means 510 and the discharging means 520 are individually driven. Therefore, when the dehydrated cake has a high water content and discharge is smooth, only the discharge means 520 is operated to discharge the cake to the outside of the stacked cylinder 100, and when there is a risk of sticking due to a low moisture content, the crushing means 510 ) to operate the discharging means 520 after crushing to discharge the cake to the outside of the stacked cylinder 100 .

On the other hand, the cake forced discharging means 500 may be configured to simultaneously drive the crushing means 510 and the discharging means 520 by a motor as a single driving source. That is, the first power transmission gear 512 of the crushing means 510 and the second power transmission gear 522 of the discharge means 520 are connected to each other by a belt or a connecting gear, and the belt or the connecting gear is connected to one motor. should work with At this time, it is possible to crush and discharge the cake while controlling the degree of rotation and forward/backward of the drill member 511 and the screw member 521 by adjusting the gear ratio between the first and second power transmission gears 512 and 522 .

Hereinafter, the operational relationship of the sludge dewatering device having the structure for forced discharge of the cake of this embodiment configured as described above will be described.

4 to 5c, the sludge is put into the inlet located on one side of the stacked cylinder 100, and the screw 200 is operated to place the introduced sludge on the other side of the screen type cylinder 150. transported to the outlet. Then, the compressed liquid formed as it is gradually dehydrated by the screw 200 is discharged to the outside through the gap between the movable disk 120 and the fixed disk 110 and the hole in the screen, and the dehydrated sludge is discharged toward the outlet in the form of a cake. Move.

On the other hand, when the dewatered cake moves toward the outlet of the screen-type cylinder 150, the cake forced discharging means 500 operates to crush the dehydrated cake and forcibly discharge it to the outside. That is, the drill member 511 rotates and moves forward and backward by the power of the first motor 513 constituting the crushing means 510 to crush the dehydrated cake filled in the empty space, and configure the discharge means 520 . The screw member 521 rotates and moves forward and backward by the power of the second motor 523 to discharge the crushed cake from the empty space to the outside of the screen-type cylinder 150 .

Figure 6 is a schematic diagram showing the configuration of a sludge dewatering device having a forced discharge structure of the cake according to another embodiment of the present invention, Figures 7a to 7c are forcibly crushing the cake in the sludge dewatering device shown in Figure 6, It is an operation state diagram showing the discharging process.

As shown in Figures 6 to 7c, the sludge dewatering apparatus 10A of this embodiment is composed of a cylinder (100A) of a full screen type, whereby the cylinder (100A) as a whole is configured in the form of a perforated network, and the swing bar is separately It has the same configuration as the sludge dewatering device 10 shown in FIGS. 4 to 5C except that it is not provided. That is, the sludge dewatering device 10A of this embodiment consists of the cylinder 100A as a full screen type, and as shown in FIGS. 4 to 5c , a plurality of fixed disks 110 and movable disks 120, including movable disks ( It has a structure that does not include the pivot bar 300 for driving the 120 .

On the other hand, in configuring the cylinder 100A, it is configured in a tapered shape (reverse inclination structure) in which the inner diameter gradually decreases from the vicinity of the outlet side of the cylinder 100A. This is to create a situation in which more sludge is filled in the vicinity of the outlet side of the cylinder 100A so that the sludge is compressed more efficiently and then collected toward the center and discharged more smoothly.

In the sludge dewatering device 10A of this embodiment, the sludge is gradually dewatered by the rotation of the screw 200A, the compressed liquid is discharged to the outside through the perforated network, and the dewatered sludge moves toward the outlet in the form of a cake. At this time, the compressed liquid (water) is smoothly discharged to the outside through the hole of the perforated network. And, the dehydrated cake is crushed and forcibly discharged to the outside. For this purpose, the configuration and operating relationship of the cake forced discharging means 500A is the same as that of FIGS. 4 to 5C, and thus a description thereof will be omitted.

The sludge dewatering device of this invention is configured in a screw press method having a shaftless screw section, but rotatably supports the end of the shaftless blade using a bearing so that bending does not occur in the shaftless blade, and the filtration part of the shaftless screw section is reversely inclined In addition to the structure, the shaftless blades are configured with a steep slope so that the force acting on the sludge is directed toward the center, and the direction of discharging water contained in the sludge and the direction of the force acting on the sludge are different from each other, and the water is discharged through the filter unit. By doing this, a cake of low moisture is created, and the phenomenon that it becomes difficult to discharge due to the decrease in fluidity of the cake of low moisture is crushed using the empty space formed by the shaftless screw section and then forced to the outside. By doing this, it is possible to smoothly discharge the cake and thereby smooth dehydration and improve the moisture content (low moisture content).

Specifically, the sludge dewatering device of this invention crushes the cake moving toward the outlet of the cylinder using the cake forced discharge means and then forcibly discharges the cake to the outside of the cylinder, so that the cake can be smoothly discharged, thereby enabling the efficient sludge dewatering device. work is possible That is, because the cake is not accumulated by being attached to the shaft and/or blade due to the smooth discharge of the cake, it is possible to smoothly operate the sludge dewatering device capable of low moisture content.

In addition, the sludge dewatering device of the present invention forms an empty space for crushing the dewatered cake and forcibly discharging it to the outside through a shaftless blade, and rotatably supports the shaftless blade on the inside of the frame using a bearing. By adopting , it is possible to dewater the sludge through the screw in a stable state and to discharge the cake smoothly through the cake forced discharge means.

In addition, the sludge dewatering device of this invention consists of a shaftless blade at an inclination angle of about 15 to 35° forward with respect to the vertical direction of the shaft surface, and crushes and discharges the dewatered cake while collecting it inside the empty space, so that the cake is smooth. discharge is possible.

In addition, the sludge dewatering device of this invention is configured to separately drive the crushing means and the discharging means constituting the cake forced discharge means, so that efficient discharge of the cake through the selective driving of the crushing means and the discharging means in consideration of the moisture content of the dehydrated cake is possible. It is possible.

In the above, the technical details of the sludge dewatering device having the forced discharge structure of the cake of the present invention have been described along with the accompanying drawings, but this is an exemplary description of the best embodiment of the present invention. Therefore, the present invention is not limited to the embodiments described above, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention, so such modifications Examples or modifications will also fall within the scope of the claims of this invention.

10: sludge dewatering device 100: stacked cylinder
110: fixed disk 120: movable disk
150: screen-type cylinder 200: screw
210: shaft 220: blade
300: swivel bar 400: motor
500: cake forced discharge means
510: crushing means 511: drill member
512: first power transmission gear 513: first motor
520: discharge means 521: screw member
521a: screw blade 521b: support member
522: second power transmission gear 523: second motor

Claims (4)

A cylinder having a structure in which water contained in the sludge is discharged, a screw installed along the central axis of the cylinder to press and dehydrate while moving the sludge, and a motor installed at one side of the screw to provide power to drive the screw and cake forced discharge means installed on the other side of the screw opposite to the motor to crush the dehydrated cake and forcibly discharge it to the outside of the cylinder,
The cylinder is configured to have its inner diameter gradually smaller from near the outlet side of the cylinder,
The screw is composed of a shaft installed along the central axis of the cylinder, and a blade integrally coupled along the periphery of the shaft,
The shaft is configured with the same diameter and extends only to a certain length of the cylinder in a state where one side is coupled to the motor and rotatably supported, and the other side has the form of a free end,
The blade has the form of a main shaft section integrally coupled with the shaft at an inclination angle of 3 to 4° forward with respect to the vertical direction of the shaft surface up to the free end of the shaft, and thereafter, in the vertical direction of the shaft surface It is arranged so that the end of the shaft-free blade is rotatably supported by the cylindrical frame by a bearing in a state in which it is further extended in the form of a shaftless section at an inclination angle of 15 to 35° forward to
The cake force discharging means includes a crushing means for crushing the dehydrated cake filled in the empty space while rotating and moving forward and backward along the empty space in the axial direction formed by the shaftless blade, and along the inside and the empty space of the crushing means Discharge means for discharging the crushed cake to the outside of the cylinder while rotating and moving forward and backward,
The crushing means is a hollow type in which the front and rear ends are open and is formed to have a gear structure on the outer surface of the drill member to crush the dehydrated cake filled in the empty space while rotating and moving forward and backward along the empty space, and the drill; A first power transmission gear disposed in a shape surrounding the circumference of the member and having a structure meshed with the gear of the drill member, and a first motor for providing power to the first power transmission gear,
The discharging means is formed to have a gear structure on the outer surface of the support member for supporting the shaftless screw blade and the shaftless screw blade, and rotates and moves forward and backward along the empty space and inside the drill member. A screw member discharging from the empty space to the outside of the cylinder, a second power transmission gear disposed in a shape surrounding the circumference of the support member and having a structure meshed with the gear of the support member, and power to the second power transmission gear Sludge dewatering device having a forced discharge structure of the cake, characterized in that it comprises a second motor to provide. The method according to claim 1,
The cylinder is a laminated cylinder configured by alternately stacking a plurality of ring-shaped fixed disks and movable disks to have a gap therebetween, and a screen-type cylinder formed continuously on one side of the laminated cylinder and consisting of a perforated mesh screen. includes,
The screen-type cylinder is a sludge dewatering device having a forced discharge structure of the cake, characterized in that the inner diameter gradually decreases toward the outlet located at the end of the screen-type cylinder. The method according to claim 1,
The cylinder is a sludge dewatering device having a forced discharge structure of the cake, characterized in that the whole is composed of a screen in the form of a perforated network. 4. The method according to any one of claims 1 to 3,
The blade is a sludge dewatering device having a forced discharge structure of the cake, characterized in that the main shaft section has a thickness within 7mm, and the shaftless section has a thickness of 20-25mm.

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