KR101458499B1 - Sludge dehydration device - Google Patents

Abstract

The present invention relates to a sludge dehydration device which dehydrates moisture included in sludge generated in a process of treating organic matters of high concentration such as livestock excretions, food waste, a sewage treatment plant, and a digestion tank, dehydrates sludge having high moisture content, and minimizes sludge quantity which is finally emitted, and more specifically, to a screw press-type sludge dehydration device which has a shaft with a screw vane moving sludge, compresses sludge by differentiating the diameter of the shaft, reducing a space of the screw vain and a screen, and having a slant unit in the shaft, and maximizes a dehydration effect.

Description

Technical Field [0001] The present invention relates to a screw-type sludge dewatering apparatus,

The present invention relates to a method for dewatering water contained in sludge generated in the process of treating high-concentration organic matter such as livestock manure, food waste, sewage treatment plant, digestion tank, etc. to dewater sludge having a high water content of water to a maximum extent to minimize the amount of sludge finally discharged And more particularly, to a sludge dewatering apparatus comprising a shaft provided with a screw vane for moving sludge, wherein an inclined portion is provided on the shaft to reduce the gap between the screw vane and the screen by varying the diameter of the shaft, To a screw press type sludge dewatering device that maximizes the dewatering effect.

Generally, sludge is generated in the process of treating high concentration organic matter such as livestock manure, food waste, sewage treatment plant, digestion tank, etc. Such sludge contains a large amount of water, and thus, the cost for sludge treatment increases, there is a problem.

Accordingly, there has been proposed a dehydration apparatus for removing water contained in sludge.

Examples of such prior arts include "food waste dehydrator" of Patent No. 10-1128192 and "dehydration drying system of construction sludge" of Registration No. 10-1222452.

The above-mentioned prior art No. 10-1128192, " food garbage dehydrator " is mounted on both sides of the frame body and on the upper side of the frame body with an interval, a discharge port is formed at one side, a discharge port is formed at the opposite side, A dewatering unit mounted in the horizontal direction of the support frame and configured to remove water and oil contained in the food wastes through a rotation operation, and a dewatering unit mounted on the frame body and discharged from the dewatering unit, And a controller for controlling and regulating the dewatering means and the discharging means, the dewatering means being provided on the frame body,

The above-mentioned prior art Durok No. 10-1222452 entitled " Dewatering & Drying System for Construction Sludge " is a system for separating water and sludge from construction sludge such as water and mud during the construction and dismantling of buildings and houses, An apparatus for preventing environmental pollution and recycling a construction sludge, comprising: a dewatering device; and a drying device for dehydrating and drying the first concentrated sludge dewatered through the dewatering device, wherein the dewatering device has an inlet port and an outlet port A dewatering screen net connected to a tubular mesh screen which is inserted into the inside of the body and has an inlet and an outlet, and an inlet port through the inlet port, A dewatering section composed of a feed screw for dewatering while transferring the sludge and a motor for rotating the feed screw, Wherein the drying apparatus comprises a storage box for storing the first concentrated sludge transferred through the transfer pipe, and a storage tank for storing the concentrated sludge transferred from the storage tank to the storage tank, And a drying unit for dehydrating and drying the first concentrated sludge of the storage box conveyed by the conveying conveyor to form a second concentrated sludge. The drying sludge drying system according to claim 1, It is instructive.

However, the above two prior arts are related to a device for dewatering food garbage and sludge, which is a method of two-step dewatering through a screw, in which a structure of a generally used screw is presented, There is a problem that dehydration takes a long time or dehydration is not performed completely and odor is generated.

In order to solve the above problems, the prior art for enabling complete dewatering is disclosed in Korean Patent No. 10-1095545 entitled " Apparatus and Method for Processing Contaminated Contamination Including a Scrubber Type Drum Bore Processor " 10-0674580 " Automatic Vehicle Speed Proportional Control Device of Centrifuge "

The above-mentioned prior art No. 10-1095545 "separates solid and liquid containing contaminants from supplied wastewater, continuously separates without clogging by clogging, and then solidifies including the contaminants are compressed to form a cake, and the separated liquid is sand The present invention provides a system and a method for compressing a sand by filtering and sanding the sand so that the sand is filtered to form a cake screen. The drum screen is provided with a perforated mesh for centrifugally discharging the liquid component from the wastewater supplied through the scraper screw. And a scraper type scraper which is disposed inside the drum screen and compresses the solid content including the impurities by rotational force and discharges through one end of the drum screen and simultaneously scans the drum screen, The liquid that is separated and discharged from the impurity processor The sediments separated by sedimentation separation are separated from the sediment separation tank and the drum perforation type scraper type impregnation processor. The solid impurities including the impurities and the inclined screw conveyor are used to compress and dewater the fine impurities supplied from the septic tank to separate the caked solid The present invention provides an apparatus and method for processing a total scum including a drum piercing type scraper type scum processor including a screw press for discharging, a silt separating bath, and a storage tank for storing a liquid discharged from a screw press,

The above-described prior art No. 10-0674580 entitled " Automatic Vehicle Speed Proportional Control Apparatus " of the centrifugal separator outputs a vehicle speed control value to an inverter through a vehicle speed braking current value inputted in accordance with the concentration of sludge and the discharge pressure of solids, Is controlled by the vehicle speed control value to obtain the discharged solid matter of desired characteristics, the load current value applied to the vehicle speed motor in accordance with the concentration of the sludge which is electrically connected to the inverter and the vehicle speed motor, The load current value is compared with the set range of the braking current according to the concentration of the predetermined sludge, the solids discharge pressure, and the conveying torque, and the vehicle speed control value is output to the inverter, A centrifugal separator including a vehicle speed controller for controlling the motor in proportion to the vehicle speed current value It suggests an automatic vehicle speed proportional control device.

However, the above-mentioned two prior arts have proposed a method of separating contaminants into a liquid component and a solid component by being squeezed by rotation of a screw, or separating the contaminants through a centrifugal separator, wherein the water contained in the contaminants is removed by rotation of the screw, It is possible to dehydrate, but there is no specific technique for completely removing the moisture contained in the impurities, and there is a problem that odor may be generated due to the minute water content.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the above problems, and it is an object of the present invention to provide a screw press type sludge dewatering apparatus comprising a shaft provided with a screw vane for dewatering and moving sludge, And the screw vane on the discharge side is arranged close to the screen to increase the squeezing force of the sludge to maximize the dewatering effect,

The interval between the screw vanes gradually decreases toward the discharge portion so that the squeezing force of the sludge moving between the screw vanes is further increased,

The housing having a cleaning means to facilitate cleaning of the screen through the cleaning means when the screen is clogged with sludge,

A screw press type sludge which maximizes the dewatering effect of the sludge by increasing the duration of squeezing by the screw vane by lowering the moving speed of the sludge by the gravity by making inclination of the housing by providing the height adjusting means on one side or both sides of the housing, And a dewatering device.

In order to achieve the above object, a screw press type sludge dewatering apparatus according to the present invention comprises:

Housing and

A screen provided with a mesh network, and a discharge port provided in the housing for discharging the dewatered sludge,

And a shaft provided on the screen and rotatable in connection with the second driving unit, the sludge being introduced into the sludge supply unit, the moving unit moving the sludge into the screen and the sludge dewatering and moving the syringe, However,

The shaft further includes an inclined portion,

Wherein the screw vane is formed in a screw shape on an outer periphery of the shaft, and the interval of the screw vanes is gradually decreased toward the discharge portion.

As described above, in the screw press type sludge dewatering apparatus according to the present invention, the shaft provided with the screw vane for dewatering and moving the sludge is provided with the inclined portion so as to increase the diameter toward the discharge portion, so that the screw vane and the screen, and,

The interval between the screw vanes provided at the outer periphery of the shaft is reduced to the discharge side to increase the squeezing force of the sludge moving through the screw vanes and to maximize the dewatering effect to reduce the odor and to reduce the weight of the cake produced by dewatering the sludge Improve the effect,

If the screen provided with the mesh network is contaminated by the sludge or the through hole of the mesh network is clogged, it is cleaned through the cleaning means provided in the housing,

Height adjustment means is provided on one side or both sides of the housing to make a slope in the housing to reduce the moving speed of the sludge moving through the screw vane by gravity to improve the duration of squeezing through the screw vane, And the weight of the cake is reduced to prevent environmental pollution and the sludge can be squeezed in a single operation to increase the efficiency of the operation.

Fig. 1 is a photograph
Fig. 2 is a photograph showing an opening of the opening / closing part according to the present invention and an enlarged view
3 is a cross-sectional view according to the present invention and an enlarged view of an inclined portion
4 is a cross-sectional view and a photograph
Fig. 5 is a view showing an embodiment of the height adjusting means according to the present invention
FIG. 6 is an exploded perspective view of a press-
7 is a cross-sectional view of the compression ball according to the present invention
8 is a view showing an embodiment of the compression ball according to the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 to 3, a screw press type sludge dewatering device P according to the present invention comprises a housing 10, a screen 20 provided in the housing 10, And a shaft 30 provided on the shaft 30.

More specifically, a housing part 11 is formed in the housing 10 and a screen 20 having a dewatering part 27 formed therein is provided in the housing part 11. The dewatering part 27 Is provided with a shaft 30.

A first driving means 21 for rotating the screen 20 is provided on one side of the screen 20 and an outer circumference of the screen 20 is connected to a sludge passing through the inside of the screen 20 And a plurality of through holes 251 through which water to be dehydrated can be passed through the mesh net 25. The mesh network 25 is characterized in that it can pass liquid such as water or oil but does not discharge sludge P1 particles.

The shaft 30 is connected to the second driving means 31 for rotating the shaft 30 and is provided at one side with a livestock manure, And a sludge P1 generated in the process of treating high-concentration organic matter such as refuse, sewage treatment plant digestion tank and the like is charged into the charging part 33 is formed. A moving part 34 is provided so that the sludge P1 introduced into the shaft 30 through the charging part 33 can be moved to the inside of the screen 20 outside the shaft 30 . The sludge P1 is discharged to the outside of the shaft 30 through the moving part 34 when the sludge P1 is introduced into the shaft 30 through the charging part 33, In the screen 20 by the screen 20 surrounding the screen 20.

The sludge P1 is moved along the outer periphery of the shaft 30 as the shaft 30 rotates through the second driving means 31 connected to the shaft 30 at the outer periphery of the shaft 30, And a screw vane 36 is provided in the form of a screw on the outer periphery of the shaft 30. Dewatered sludge P1 is caked on one side of the screen 20, And the sludge P1 is moved toward the discharge part 23 by the screw vane 36. [

The screw vane 36 dewater sludge P1 introduced through the inlet 33 and moves toward the outlet 23. At this time, in order to improve the dewatering effect of the sludge P1, The shaft 30 is formed with an inclined portion in which the diameter of the shaft 30 increases from the insertion portion 33 toward the discharge portion 23.

The diameter of the shaft 30 increases toward the discharge portion 23 due to the inclined portion so that the outer peripheral edge of the shaft 30 at the discharge portion 23 and the peripheral edge of the discharge portion 23 The sludge P1 which is moved along the periphery of the shaft 30 in the screen 20 is subjected to a strong pressure so that the water contained in the sludge P1 And the solid such as oil and the solid body of the sludge P1 are separated from each other, so that the dehydration and deoiling of the sludge can be performed effectively.

3, the screw press type sludge dewatering device P according to the present invention includes a screw vane 36 provided at the outer periphery of the shaft 30 to maximize the dewatering effect of the sludge P1. The gap is gradually reduced toward the discharge portion 23 side.

3, the interval A between the screw vanes 36 on the side of the inlet 33 is larger than the interval B between the screw vanes 36 on the side of the outlet 23, The sludge P1 is discharged from the charging unit 33 toward the discharging unit 23 while the shaft 30 rotates along the screw vane 36 provided at the outer periphery of the shaft 30, The sludge P1 is pressed between the pressing portions 361 of the screw vanes 36 to be squeezed to the sludge P1 The water contained therein is dehydrated. At this time, the screw press type sludge dewatering device P according to the present invention narrows the interval of the screw vanes 36 toward the discharge part 23, so that the distance between the pressing parts 361 of the screw vane 36 By increasing the pressure for pressing the sludge P1 by narrowing the gap, the dewatering effect of the sludge P1 can be maximized by improving the pressing force.

Although the diameter of the shaft 30 is gradually increased toward the discharge portion 23 as described above, the diameter of the shaft 30 is preferably increased toward the discharge portion 23, A slope part is provided so as to increase in diameter from the part 33 toward the discharge part 23 and then decreases again so that the diameter increases and decreases repeatedly so that the change in the pressing force applied to the sludge P1 It is possible to maximize the dehydration effect by repeatedly pressurizing with double triple feed,

The diameter of the shaft 30 and the distance between the screw vanes 36 can be varied in a variety of ways, .

3 to 4, the screw press type sludge dewatering device P according to the present invention further comprises a first driving means 21 and a second driving means 22 for rotating the screen 20 and the shaft 30, respectively, The screen 20 and the shaft 30 may be rotated in opposite directions by rotating only one of the screen 20 and the shaft 30 through separate driving means When the screen 20 and the shaft 30 are rotated in opposite directions, the rotational force is increased by the small power to increase the dewatering efficiency, so that the power consumption is reduced, and the cleaning means 40, The cleaning efficiency can be increased when the shaft 30 and the screen 20 are cleaned by high pressure.

In the course of dewatering the water contained in the sludge P1 generated in the process of treating the high concentration organic matter such as livestock manure, food waste, and sewage treatment plant digestion tank through the screw press type sludge dewatering device P according to the present invention, The sludge P1 includes various kinds of particles as well as moisture so that the sludge P1 can move along the inside of the shaft 30 formed in the mesh net 25 while moving toward the discharge port 23 from the input port 33, The dehydrated water is not discharged to the outside of the shaft 30, so that the dewatering effect is deteriorated.

Therefore, in order to solve such a problem, the housing 10 is further provided with a cleaning means 40 for cleaning the screen 20.

More specifically, the washing means 40 includes a plurality of washing units 41 provided at the upper part of the inside of the housing 10, and a washing unit 41 provided at the lower part of the housing 10 to remove dehydrated water or sludge P1. And the drainage portion 43 into which all of the water

consist of.

The washing unit 41 includes a plurality of spray nozzles 411 capable of spraying the washing liquid at a high pressure. The drain unit 43 includes a receiving unit 431 provided at a lower portion of the housing 10, And a drainage hole 433 provided in the drainage portion 431.

Accordingly, when the through-hole 251 of the screen 20 is blocked, the screen 20, which is rotated by spraying the high-pressure cleaning liquid from the spray nozzle 411 provided at the upper portion of the housing 10, At this time, the screen 20 can be cross-rotated in the forward and reverse directions through the first driving means 21 to increase the cleaning efficiency.

Also, the shaft 20 provided in the screen 20 is also rotated by washing. At this time, as described above, the screen 20 and the shaft 30 are separated from each other by first and second driving means (31) so that the dewatering efficiency is increased and the power is dispersed to reduce the power consumption.

The dehydrated water from the washed washing liquid or the sludge P1 is drained through the drainage unit 43 provided in the lower portion of the housing 10. More specifically, the dehydrated water is drained from the washed washing liquid or sludge P1, Or both of them are gathered in the receiving part 431 provided at the lower part of the housing 10 and drained through the drainage hole 433 provided in the receiving part 431. [ At this time, the receiving portion 431 is inclined in the direction of the drain hole 433 so that the washing liquid or water flows naturally to the drain hole 433 by gravity. The position of the drain hole 433 is, But it may be installed at one side of the receiving part, as shown in one embodiment.

Further, the housing 10 is provided with an opening / closing part 13 which is openable and closable for cleaning and checking the screen 20, and FIG. 2 shows a state in which the opening / closing part 13 is opened , It is possible to separate only the opening and closing part (13) during maintenance of the screen (20), shortening the time for maintenance and facilitating the maintenance, thereby improving convenience of use.

As shown in FIG. 5, the screw press type sludge dewatering device P according to the present invention further includes height adjusting means 50 on one side or both sides of the housing 10.

5 (B) is a perspective view of the height adjustment means 50 (see FIG. 5). The height adjustment means 50 is provided at one side or both sides of the lower end of the housing 10 to adjust the height of the housing 10. The height of one side of the housing 10 is different from that of the housing 10 so that the housing 10 is tilted. The outlet 10 of the housing 10 is higher than the housing 10, The sludge P1 which is moved in the direction of the discharging part 23 from the inside of the screen 20 is discharged to the discharging part 23 through the discharging part 23, (33).

Accordingly, the moving speed of the sludge P1 moving toward the discharge portion 23 is reduced, and the duration of squeezing of the sludge P1 is increased by the pressing portion 361 of the screw vane 36, Can be further maximized. It is also preferable that the angle of the housing 10 with the mounting surface of the screw press type sludge dewatering device P according to the present invention by the height adjusting means 50 is adjustable from 0 to 20 degrees, The force of gravity applied to the sludge P1 is strong and the sludge is backwardly directed toward the inlet portion 33, so that dehydration may not be performed.

4, the dewatered sludge P1 is caked to form a dewatering cake. The dewatering cake is connected to the discharge portion 23 of the shaft 30 and is provided in the housing 10 The armo-box is a waste container provided in a vehicle for collecting wastes and the like. In this case, the armo-box is connected to the receiving portion 231 There is a problem that the dehydrated cake can not be collected directly in the box.

Therefore, the screw press type sludge dewatering device P according to the present invention is provided with the auger pipe 233 in the rejection 231, and the auger pipe 233 is provided so as to be movable up and down and left and right, And a screw type screw rod 235 is provided in the auger pipe 233 so that the movement of the dewatering cake to the arm and roll box can be smoothly performed by rotation of the screw rod 235 Thereby improving the efficiency of use.

6 to 8 show a squeeze hole 70 to be introduced into the screen 20 in order to maximize the dewatering effect of the screw press type sludge dewatering device P according to the present invention. A plurality of squeeze holes 70 are further provided to maximize the dewatering effect of the sludge P1 dewatered along the outer periphery of the shaft 30 in the screen 20. More specifically, A plurality of holes 70 are provided in the screen 20 and the pressing holes 70 are formed of a first powder 71 and a second powder 73. The first powder 71 and the second powder 73 The powder 73 is each hemispherical so that the first powder 71 and the second powder 73 are combined to form a single squeeze hole 70. The first powder 71 and the second powder 73 are provided with a center of gravity 79. More specifically, the first powder 71 and the first powder 713 are disposed in the first powder 71 and the second powder 73, respectively. A second seating portion 733 is formed in the second powder 73 so that when the first powder 71 and the second powder 73 are engaged with each other, the first seating portion 713, A portion of the weight center hole 79 is seated on the first seat portion 713 and the remaining unsealed portion of the weight center hole 79 is engaged with the second seat portion 733 so that the center of gravity 79 is provided inside the squeeze hole 70. When the squeeze hole 70 presses the sludge P1 by the rotation of the shaft 30 by providing the center of gravity 79, a certain pressure is applied to maximize the dewatering effect of the sludge P1 have.

In addition, a plurality of mesh holes 75 are provided on the outer surface of the squeeze hole 70. The mesh holes 75 allow the water to be easily passed through the sludge P1 when the sphere P1 is pressed, P1, and the shape and the number of the mesh holes 75 may be variously configured.

6 and 7, the first powder 71 and the second powder 73 are firmly coupled by the fixing bolt 76 and the fixing nut 77, A fixing bolt 76 and a fixing nut 77 protruding from the squeeze hole 70 inserted into the screen 20 when the fixing nut 77 and the fixing nut 77 protrude from the squeeze hole 70, The movement is not free and scratches or the like may be generated in the screen 20 or the shaft 30. [ The first powder 71 is provided with a nut hole 711 to which the fixing nut 77 is coupled and the second powder 73 is provided with the bolt hole 731 into which the head portion of the fixing bolt 76 is inserted The fixing nut 77 and the fixing bolt 76 can be prevented from protruding to the outside of the pressing hole 70 when the pressing hole 70 is fixed through the fixing bolt 76 and the fixing nut 77 have. The nut 711 has the same shape as that of the fixing nut 77. When the fixing bolt 76 is fastened to the fixing nut 77, a tool for fixing the fixing nut 711 is not used. Efficiency can be increased.

Further, the fixing bolt 76 penetrates the first powder 71 and passes through the fixing hole 791 passing through the center of the center of gravity 79, and passes through the second powder 73, So that the weight center hole 79 is firmly fixed in the compression hole 70 to prevent shaking.

8 is a view showing an embodiment in which the squeeze hole 70 is inserted into the screw press type sludge dewatering device P according to the present invention. The squeeze hole 70 is inserted into the screen 20, The screw vanes 36 of the discharge portion 23 are spaced apart from each other by a predetermined distance in order to move the squeeze holes 70 through the screw vanes 36 B, the diameter C of the squeeze hole 70 is smaller. The diameter C of the squeeze hole 70 is set to be small so that the diameter C of the squeeze hole 70 is prevented from flowing along with the sludge P1 The discharge portion 23 of the shaft 30 is formed to be larger than the size D of the discharge portion 23 through which the squeeze hole P1 is discharged. In order to more firmly prevent the squeezing hole 70 from being discharged together with the sludge, It is preferable that the sludge P1 is discharged and the squeeze hole 70 is not discharged by reducing the size of the discharge portion 23 by providing the latching jaw 339 on the side of the sludge.

While the present invention has been particularly shown and described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Modifications, alterations, and substitutions are to be construed as falling within the scope of protection of the present invention.

P: screw press type sludge dewatering device
P1: Sludge 10: Housing 11:
13: opening and closing part 20: screen 21: first driving means
23: discharge part 231: cancellation 233: auger pipe
235: screw rod 25: mesh net 251: through-hole
27: dehydrating section 30: shaft 31: second driving means
33: input portion 34: moving portion 36: screw vane
361: pressing portion 37: inclined portion 339:
40: cleaning means 41: cleaning portion 411: spray nozzle
43: drain part 431: receiving part 433: drain
50: height adjusting means
70: Compression ball 71: First powder 711: Nut hole
713: first seat portion 73: second powder 731: bolt hole
733: second seat part 75: mesh hole 76: fixing bolt
77: Fixing nut 79: Gravity center hole 791: Fixing hole

Claims (4)

A housing (10);
And a discharge unit 23 provided in the housing 10 for discharging the dewatered sludge P1 by rotating the first driving unit 21. The screen 20, ;
A charging unit 33 provided on the screen 20 and connected to the second driving unit 31 so as to be rotatable and charged with the sludge P1 and a charging unit 33 for charging the charged sludge P1 to the screen 20 And a shaft (30) having a moving part (34) for moving the sludge (P1) and a screw vane (36) for dewatering and moving the sludge (P1)
The shaft (30) is further provided with an inclined portion (37)

In the screen 20,
A plurality of pressing holes 70 including a center-of-gravity hole 79 are provided,
The squeeze hole 70 includes a first powder 71 having a first seating portion 713 for seating a part of the center of gravity 79 and a second seating portion 71 for seating the balance of the center of gravity 79. [ And a second powder (73) provided with a second sintered body (733). The method according to claim 1,
The screw vane (36) is formed in a screw shape on the outer circumference of the shaft (30)
And the interval of the screw vanes (36) is gradually decreased toward the discharge part (23).
The method according to claim 1,
In the housing 10
A washing unit 40 having a washing unit 41 in which the washing liquid for washing the screen 20 is sprayed and a drainage unit 43 for discharging the washed washing liquid or dehydrated water or both are provided,
Wherein the housing (10) further comprises height adjusting means (50) for adjusting the height of the housing (10) on one side or both sides of the housing (10). 4. The method according to any one of claims 1 to 3,
A plurality of mesh holes (75) are further formed on the outer surface of the squeeze hole (70)
The first powder 71 and the second powder 73 are coupled to each other by a fixing bolt 76 and a fixing nut 77,
The first powder 71 is provided with a nut hole 711 to which a fixing nut 77 is coupled and the second powder 73 is provided with a bolt hole 731 through which a head portion of the fixing bolt 76 is inserted And the fixing bolt (76) and the fixing nut (77) are coupled to the outside of the pressing hole (70) without protruding.

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