KR100726986B1 - Apparatus for dehydrating paper making sludge - Google Patents

Abstract

A paper-making sludge dehydrating equipment which minimizes volume and weight of sludge to be post-treated by completely removing water from paper-making sludge containing a large amount of water, and prevents the equipment from being broken down and reduces power consumed in dehydration by preventing dehydrated cake from being stuck into a wedge screen in the dehydration process is provided. An equipment for dehydrating paper-making sludge comprises: a sludge supplying pipe(3) of which one end is connected to a rotary joint(11) for supplying paper-making sludge, and which has a paper-making sludge discharge hole formed in the other end thereof; a main shaft(4) of which one end is connected to the sludge supply pipe, of which the other end is connected to the rotor, and which is driven by a rotor rotating motor(5); a rotor(25) fixed to the main shaft at a position near the paper-making sludge discharge hole of the sludge supply pipe; a wedge screen(26) which is put on an outer side of the rotor such that the wedge screen can be slid onto the main shaft while containing the paper-making sludge discharge hole of the sludge supply pipe in an inner space thereof; moving means for moving the wedge screen in a width direction of the main shaft; and a switch assembly(8) for limiting a movement range of the wedge screen reciprocated by the moving means.

Description

Paper sludge dewatering device {Apparatus for dehydrating paper making sludge}

1 is a cross-sectional view of a conventional sludge dewatering device

2 is a left perspective view of the present invention

3 is a right perspective view of the present invention

4 is an exploded perspective view of the present invention

5 is a front view showing the appearance of the present invention;

6 is a plan view of the present invention

Figure 7 is a front view showing the interior of the present invention

8 is a front sectional view showing a state in which paper sludge is introduced in the present invention.

9 is a front sectional view showing a state in which the dehydrated cake is discharged in the present invention;

Figure 10 is a front sectional view showing a state for maintenance in the present invention

* Explanation of symbols for the main parts of the drawings

A: drive part B: dewatering part

C: outlet 1: base frame

2,2a: Bracket 3: Sludge supply pipe

4: main shaft 5: rotor rotation motor

6: wedge screen moving cylinder 7: slide gate opening and closing cylinder

8: limit switch assembly 11: rotary joint

12: paper sludge discharge hole 13: reducer

20: slide gate 25: rotor

26: Wedge Screen 27: Slide Gate Valve

30: torque bar 31: sludge cake outlet

33: collecting panel 34: drain pipe

35: sludge cake discharge pipe

The present invention relates to a sludge dewatering device, in particular to incineration or landfill with industrial waste to completely remove the water from the paper sludge containing a large amount of water to minimize the volume and weight of the sludge after-treatment And a paper sludge dewatering device capable of preventing the dehydration cake from sticking to the inside of the wedge screen in such a process, thereby eliminating the risk of failure and reducing the power required for the dewatering treatment. .

In general, the papermaking process of manufacturing paper of lipids suitable for the purpose through various mechanical and chemical treatments using pulp as the main raw material is divided into composition process, papermaking process, and coating process, and then cut and packaged according to the specification in the finishing process. It is sold to consumers, in which the composition process dissociates the pulp, the main raw material of the paper, into water to release the pulp fibers, and then releases the pulp fibers until water reaches an appropriate level, followed by sizing agents and fillers. In the process of preparing the paper through the selection process after stirring, the retention enhancer and other additives are stirred, a large amount of paper sludge is generated in this composition process.

In addition, used paper waste paper, cardboard waste paper, advertisement paper, posters, etc. are used as raw materials of recycled pulp to recycle resources.Paper weapons such as calcium carbonate, talc, fillers, and pigments on paper surfaces made of pulp fibers Chemicals are applied to give smoothness and printability.

The papermaking inorganic chemicals are left after recovering the pulp fibers from the waste paper to become paper sludge. Since these paper sludges contain pulp short fibers or ink components, they are treated by incineration in a boiler or incinerator or landfilled as industrial waste. have.

Since the paper sludge contains a large amount of water, it is difficult to transport and incinerate, so that the paper sludge is separated from the water so as to have a proper moisture content. The extraction of water from the paper sludge is performed by compression and centrifugal dehydration. .

In the case of compression dehydration, the pressurized header reciprocated by the actuator inside the screen is divided into a structure in which the sludge is compressed or dewatered and transported by a screw that compresses or rotates the compressed dehydration by the reciprocating pressurized header. Compared with the centrifugal dewatering method, the dewatering efficiency is much better, and the screw method is effective in terms of delaying the sludge backflow.

Conventional sludge dewatering apparatus is selectively adopted by the dehydration method by the compression header and the screw dehydration method, or centrifugal dehydration method as described above, if each of the dehydration method is implemented if the above system is properly harmonized The disadvantages of this complement each other will be able to take full advantage of the advantages of each dehydration method.

A general sludge dewatering device using a pressurized header and a screw method has been reported in Korean Utility Model Registration 20-320813. The sludge dewatering device has a wedge screen installed in a screen housing having a drainage port, and an inlet pipe through which sludge is introduced and an outlet through which dewatered cake is discharged are formed at both ends of the wedge screen, and the cylinder is operated in the axial direction. It is installed by a screw rotor, and the discharge port is provided with a discharge valve that is opened and closed by another cylinder, the dehydration cake is present in the gap generated between the screw rotor and the wedge screen, so that the inner diameter of the wedge screen Since there is no means for removing the adhered dewatered cake, there is a problem that the dewatered sludge cake closes the screen.

In order to solve such a problem, Korean Patent Application No. 10-2005-17875 "Sludge Dewatering Device" is known.

The apparatus is provided with a rear plate 101 and a main shaft 105 penetrating the center plate 102 and the front plate 104 installed on the frame 100, and the rear plate 101 and the center plate ( The dewatering part 107 and the drainage part 108 where the wedge screen 106 is installed in the space formed by the 102 are installed, and the dewatering part is formed in the space formed by the center plate 102 and the rear plate 103. In forming the sludge dewatering device in which the discharge part 110 including the slide valve 109 for discharging the sludge cake is formed, the axial movement is fixed to the drive shaft of the motor 112 having the reduction gear 111. And a main shaft moving cylinder 115 fixed to the slide bracket 114 guided by the guide post 113 fixed to the front plate 101 on the main shaft 105 rotatably installed. The piston rod of the tread cylinder 115 is fixed to the front plate 103, the screw rotor 116 is fixed to the position close to the sludge cake outlet of the center plate 102, the screw rotor 116 and sludge Between the input pipe 117 is a vane 119 is installed while receiving the elasticity of the spring 118 is to be fixed to the rotor 120 is formed with a step.

The sludge dewatering device can completely remove the water from the sludge containing a large amount of water by a compression dewatering method between the screw rotor 121 and the sludge inlet pipe 117, the vanes (formed in the rotor 120) It is effective in that the wedge screen 106 can be automatically cleaned by 119 to prevent the dewatered cake from which moisture is removed from sticking to the wedge screen 106.

The sludge dewatering device is considered to be the most important dehydration efficiency that can effectively dewater water from the sludge, but it is necessary to reduce the power required for the effective dewatering efficiency, in view of the power saving effect of the sludge dewatering device. It is not up to expectations.

That is, since the relatively heavy chain rotor 120 and the screw rotor 121 are to be rotated and moved together with the reducer 111 in the axial direction, the required power increases. In addition, when performing maintenance work such as replacement of the rotor 120 or the need for internal cleaning, the frame 101, 102, 103 and the wedge screen 106 had to be dismantled to be inconvenient to work.

According to the present invention, the compression dehydration method by the pressurized header, the centrifugal dehydration method, and the dehydration transfer method by the screw are appropriately harmonized. The drive device is fixed and the weight of the wedge screen, which is relatively lightweight, can be reciprocated in the axial direction to dehydrate, thereby reducing the transportation and incineration costs associated with waste disposal, and the maximum stroke of the wedge screen for reciprocating movement is the length of the rotor. Since the rotor is exposed to a longer length, it is possible to maintain the rotor by dividing only the wedge screen during maintenance, thereby providing a paper and other sludge dewatering device that can reduce the power required for processing.

The present invention for achieving the above object is a rotor is fixed to the main shaft is installed rotatably horizontally to the bracket installed on the frame is rotated by the power of the rotor rotation motor for driving the main shaft, In the outer side of the rotor, a wedge screen is installed to dewater the sludge, and in order to form a sludge dewatering device in which dehydrated sludge is discharged as the slide gate opened and closed at one side of the wedge screen is opened, paper sludge is supplied at one end. Is connected to the rotary joint, the other end is the sludge supply pipe is formed paper discharge sludge hole; A main shaft having one end connected to the sludge supply pipe while the other end thereof is fixed with a rotor and driven by a rotor rotating motor; A rotor fixed to the main shaft to rotate in position; A wedge screen which is slidably placed on the main shaft while receiving the paper sludge discharge hole of the sludge supply pipe in the inner space from the outside of the rotor; Moving means for moving the wedge screen in an axial direction of the main shaft; And a limit switch assembly for limiting the range of movement of the wedge screen reciprocated by the moving means. The wedge screen reciprocates outside the rotor rotating at a predetermined position, and the inlet dehydration and discharge of the paper sludge is performed. It is characterized by.

The moving means is a piston rod of a wedge screen moving cylinder fixed to one side of the bracket, wherein the wedge screen is movably placed on a torque bar installed horizontally so that a pair of brackets fixed to the upper part of the frame maintain an appropriate interval. Is fixed to the wedge screen.

Such features and advantages of the inventive concept will be more clearly understood by the embodiments described in detail with reference to the accompanying drawings.

Hereinafter, an embodiment in which the technical spirit of the present invention is implemented will be described in detail.

2 to 10 show drawings related to embodiments of the present invention.

As shown in this figure, the upper portion of the base plate 1 has a drive unit A for dewatering the supplied paper sludge, and a dehydration unit B for dehydrating the water of the paper sludge by the driving force of the drive unit A. FIG. ) And a discharge portion (C) for discharging the dewatered water and the sludge cake.

The driving unit A is supported by a pair of brackets 2 and 2a fixed at an appropriate interval on the upper part of the base plate 1, and is provided with a sludge supply pipe 3 and a main shaft 4 rotatably installed horizontally. Rotor motor (5) fixed to the end of the main shaft (4), wedge screen moving cylinder (6, 6a), slide gate opening and closing cylinder (7, 7a) and limit switch assembly (8) It is composed.

The sludge supply pipe 3 is rotatably supported by the bearing block 9 at one end of the sludge supply pipe 3, and is located outside the bracket 2, and the other end is between the two brackets 2, 2a. It is located in the space of the fixed to the main shaft (4), the end located outside of the bracket (2) is connected to the rotary joint (11) connected to the discharge pipe (9) of the sludge feed pump (not shown) At the end where the main shaft 4 is fixed, a paper sludge discharge hole 12 is formed to supply the paper sludge supplied from the sludge supply pump to the dewatering part B.

One end of the main shaft 4 is fixed to the sludge supply pipe 3, and the other end of the main shaft 4 is rotatably fixed to the bracket 2a by a bearing block 8a.

The rotor rotation motor 5 supplies power for performing dehydration, and is fixed to the base plate 1 together with the reducer 13, and the output shaft 14 is connected to the input shaft 15 of the reducer 12. It is connected to supply decelerated power appropriately for the dehydration operation condition.

The output shaft 16 of the reducer 13 is connected to the main shaft 4 and the chain coupling 17 to transmit the decelerated power to the main shaft 4.

The wedge screen moving cylinders 6 and 6a, the slide gate opening and closing cylinders 7 and 7a and the limit switch assembly 8 are fixed to the outside of the bracket 2a.

The piston rods 18 and 18a of the wedge screen moving cylinders 6 and 6a penetrate the brackets 2a and are fixed to the dewatering part B.

The piston rods 19 and 19a of the slide gate opening and closing cylinders 7 and 7a are fixed to the slide gate 20.

The first switch 21 and the second switch 22 of the limit switch assembly 8 are fixed to the fixing piece 23 fixed to the bracket 2a, and the first second switches 21 and 22 are fixed. The touch bar 24 for contacting the through penetrates the bracket 2a and is fixed to the dewatering part B.

The dewatering part B is composed of a rotor 25 and a wedge screen 26 fixed to the main shaft 4 to rotate.

The rotor 25 is fixed to the main shaft 4 so that the rotor 25 can rotate at a reduced power. The side facing the sludge supply pipe 3 is located close to the paper sludge discharge hole 12 and on the other hand, a slide gate valve ( 27) is placed to be movable in the horizontal axis direction.

The rotor 25 may be applied to a variety of structures in addition to the illustrated structure, the screw rotor is fixed to a position close to the sludge cake outlet as shown in the example shown in Figure 1, between the screw rotor and the sludge inlet pipe At least two rotors formed with a step may be fixed with vanes installed while receiving the elasticity of the spring.

The wedge screen 26 may be formed in a known structure in which a pair of hemispherical bodies formed of perforated plates are joined.

The wedge screen 26 is the cover 29, 29a supported by the support bar 28 is fixed to both ends and installed on the outside of the rotor 25, the paper sludge discharge of the sludge supply pipe (3) in the inner space The ball 29 is accommodated, and the cover 29 is placed on the sludge supply pipe 3 so as to be movable in the horizontal axis direction, and the cover 29 is provided on a plurality of torque bars 30 installed between the brackets 2 and 2a. , 29a is placed to be movable in the horizontal axis direction, and the piston rods 18 and 18a of the wedge screen moving cylinders 6 and 6a are fixed to the cover 29a to expose the rotor 25, and the rotor At the end where 25 is exposed, the sludge cake outlet 31 through which the dewatered sludge cake is discharged can be opened and closed by the slide gate valve 27.

In the slide gate valve 27, the valve shafts 32 and 32 a are guided into the cover 29 a, and the piston rods 19 and 19 a of the slide gate valve opening and closing cylinders 7 and 7 a are fixed so that the sludge cake outlet port ( It is possible to open and close 32) to discharge the dewatered paper sludge cake.

Discharge part (C) is a water collecting panel 33 and the drain pipe 34 is installed in the lower portion of the wedge screen 26 to supply the water discharged through the wedge screen 26 to a separate treatment facility, and the slide gate valve And a sludge cake discharge pipe 35 for discharging the paper sludge cake discharged to the sludge cake discharge port 31 by the outside to the outside of the apparatus.

Looking at the operation state of the paper sludge dewatering in the paper sludge dewatering device is configured as follows.

In the paper sludge dewatering device of the present invention, as shown in FIG. 8, the paper sludge is supplied with a sludge feed pump in a state where a sufficient space for introducing paper sludge is formed between the cover 29 of the wedge screen 26 and the rotor 25. From the discharge pipe 10 and the paper sludge discharge hole 12 of the sludge supply pipe 3 is introduced into the wedge screen 26.

At this time, the wedge screen 26 and the slide gate valve 27, the piston rod (18, 19) of the wedge screen moving cylinder (6, 6a) and the slide gate opening and closing cylinder (7, 7a) respectively advances the wedge screen (26) ) Is fixed to the cover 29, 29a is guided by the sludge supply pipe (3) and the torque bar 30 to move to the left, the limit switch assembly (fixed to the cover (29a) of the wedge screen 26) When the touch bar 24 of 8) contacts the first switch 21, the wedge screen moving cylinders 6 and 6a are stopped, and the slide gate valve 27 is blocking the sludge cake outlet 31. to be.

Thereafter, the wedge screen moving cylinders 6 and 6a fixed to the brackets 2a and the slide gate opening and closing cylinders 7 and 7a operate to retreat each of the piston rods 18 and 19, as shown in FIG. 9. Similarly, the wedge screen 26 and the slide gate valve 27 are gradually moved to the right while the rotor 25 is in position and flows into the space between the wedge screen cover 29 and the left end of the rotor 25. As the paper sludge is compressed, the power generated by driving the rotor rotation motor 5 is properly decelerated in the reducer 13 and then the rotor 25 fixed to the main shaft 4 by rotating the main shaft 4. ) Rotates to perform centrifugal dehydration.

At this time, the wedge screen 26 is a cylinder for moving the wedge screen when the touch bar 24 fixed to the cover 29a contacts the second switch 22 of the limit switch assembly 8 fixed to the bracket 2a. (6,6a) stops and stops.

The water dehydrated between the inner circumferential surface of the wedge screen 26 and the outer circumferential surface of the rotor 25 flows out of the wedge screen 26 to fall outside and is then guided to the water collecting panel 33 to be discharged to the drain pipe 34 to separate. It is sent to the water treatment process.

The dewatered sludge cake is gradually moved toward the sludge cake outlet 31 by the rotation of the rotor 25. When the slide rod opening and closing cylinders 7 and 7a operate, the piston rods 19 and 19a move backward. The sludge cake outlet 31 is opened so that the paper sludge cake is discharged by the rotating rotor 25 and then discharged through the sludge cake discharge pipe 35.

In addition, the present invention can provide a more convenient workability when performing maintenance work, as shown in Figure 10, the wedge screen moving cylinder (6, 6a) in the state of temporarily stopping the function of the limit switch assembly (8) When the piston rods 18 and 18a of the rotor are advanced as much as possible, the wedge screen 26 that houses the rotor 25 exposes the rotor 25, so as to clean the inside of the wedge screen 26 and the rotor 25. And maintenance work of parts including the replacement of the rotor 25 can be made easy.

The present invention is able to completely remove the water from the high-function sludge containing a large amount of water by the compression and rotary dehydration method, the rotor and motor for rotating the relatively heavy chain rotor is driven in the right position, the rotor is in the right position Rotating only in, the wedge screen, which is relatively lightweight, dehydrates the paper sludge by reciprocating in the axial direction, thus reducing the power, transportation and incineration costs, and allowing the wedge screen to move enough to expose the rotor for maintenance work. It is possible to easily work without disassembling the wedge screen during the operation to provide optimum performance in the device for dewatering sludge containing a large amount of water, such as paper sludge.

Claims (3)

Rotor rotation motor for driving the main shaft 4 is fixed to the rotor 25 to the main shaft (4) installed rotatably horizontally to the brackets (2, 2a) provided on the frame (1) Rotating by the power of (5), the wedge screen 26 is installed on the outside of the rotor 25 to dewater the sludge, opening and closing the slide gate 20 is opened on one side of the wedge screen 26 In forming the sludge dewatering device in which the dewatered sludge is discharged accordingly, One end is connected to a rotary joint 11 to which paper sludge is supplied, and the other end is a sludge supply pipe 3 having a paper sludge discharge hole 12 formed therein; A main shaft 4 having one end connected to the sludge supply pipe 3 while the other end has a rotor 25 fixed thereto and driven by a rotor rotation motor 5; A rotor 25 fixed to the main shaft at a position proximate to the paper sludge discharge hole 12 of the sludge supply pipe 3; A wedge screen (26) which is slidably placed on the main shaft (4) while receiving the paper sludge discharge hole (12) of the sludge supply pipe (3) in the inner space outside the rotor (25); Moving means for moving the wedge screen 26 in the axial direction of the main shaft 4; And the wedge screen 26 is reciprocated outside the rotor 25 which rotates in a predetermined position with a limit switch assembly 8 for limiting the movement range of the wedge screen 26 reciprocating by the moving means. And paper sludge dewatering device characterized in that the inlet dewatering and discharge papermaking sludge. The wedge screen (26) according to claim 1, wherein the wedge screen (26) is provided on a torque bar (30) which is installed horizontally so that a pair of brackets (2, 2a) fixed to the upper portion of the frame (1) maintains a proper distance. Paper sludge dewatering, characterized in that the piston rods 18 and 18a of the wedge screen moving cylinders 6 and 6a, which are placed to be movable and fixed to one of the brackets 2a, are fixed to the wedge screen 26. Device. delete

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