KR20150047179A - Multi-stage type automated filter press having function of ultrasonic cleaning - Google Patents

Abstract

The present invention relates to a multi-stage type automated filter press filtering processing liquid such as wastewater or the like, and more specifically, to a multi-stage type automated filter press in which a plurality of filter plates are vertically arranged in a multi-stage type, a filter cloth is arranged and moved between filter plates in a zigzag manner, the filter cloth is washed by washing water and ultrasonic vibration after the filtration, and the filter cloth can be reused accordingly.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage automatic pressure filter having an ultrasonic cleaning function,

The present invention relates to an automatic pressure filtration apparatus for filtering process liquids (wastewater and the like), and more particularly, to an automatic pressure filtration apparatus in which a plurality of filter plates are arranged in a multi-stage manner, a filter cloth is arranged and moved in a staggered manner between filter plates, The present invention relates to a multi-stage automatic pressing filter having an ultrasonic cleaning function capable of reusing a filter cloth by washing the filter cloth by ultrasonic vibration.

An automatic squeeze filter (filter press), which is a squeeze filtration and dehydrator, is used to effectively pressurize and dehydrate a slurry from wastewater (ie, process liquid) generated in an industrial or household environment and mold and separate into a cake having a low moisture content. Especially in recent years, as the dumping and landfilling of the slurry in the wastewater treatment process becomes impossible, interest in various facilities for solid-liquid separation and dewatering devices such as an automatic squeezing filter is increasing.

In such an automatic pressure filtration apparatus, filtration is performed by a filter cloth (that is, a filtration filter) provided on a filter plate by introducing a slurry, which is discharged after passing through a wastewater treatment system, between pressurized filter plates. Accordingly, the filtrate after filtration is discharged to the outside, and the sludge deposited in the filter cloth is subjected to pressurization and dehydration processes to become a cake form, and then to be treated separately.

Meanwhile, in Korean Patent Laid-Open No. 2002-82047, as shown in FIG. 1, when a filter cloth is attached or bonded to each filter plate, it is difficult to replace the filter cloths in each process, (90). Accordingly, when the process is completed, the filter cloth 90 is circulated so that the unused portion comes between the filter plates 80, thereby making it unnecessary to replace the filter cloths 90 every time, So that the filter cloth 90 over a certain cycle can be reused.

However, in the above conventional art, all of the filter plates 80 are pulled by the wire 300 connected between the filter plates 80 when the filter plates 80 are separated from each other for sludge removal In this case, force is not uniformly transmitted to all the filter plates 80, and the intervals between the filter plates 80 are not uniform. Accordingly, part of the sludge deposited on the filter cloth 90 is squeezed between the filter cloth 90 and the filter plate 80 as the filter plate 80 and the filter cloth 90 are sufficiently separated from each other, If the plate 80 and the filter cloth 90 are not sufficiently separated from each other, there is a problem that sludge is not desorbed.

The first force for pulling the wire 300 is generated because the pressing plate 34 pulls back the filter cloth 90 while retracting back. In this case, not only is the filter cloth 90 damaged, but also the filter cloth 90 Since the sufficient force is not transmitted to the wire 300, the gap between the filter plates 80 is not sufficient and is not uniform.

Further, as shown in FIG. 2, the automatic pressure filtration apparatuses are provided with a plurality of process liquid supply holes and a filtration liquid (not shown) on the front or rear surface of a filter plate (i.e., filter plate) And the process liquid supply holes of the respective filter plates 4 are communicated with each other in this state. Therefore, when the slurry is fed through the outermost process liquid feed hole, the slurry flows into the process liquid feed holes of the remaining filter plates 4, and the slurry is fed into all the filter plates 4, And filtration was performed in the process of being blown through the filter cloth attached to the rear surface. After filtration, the filtrate was discharged to the outside through the filtrate discharge hole.

However, in the conventional art as described above, in particular, since the process liquid supply holes are formed on the front surface and the rear surface of the filter plate 4 and the process liquid supply holes are connected when the filter plates are in close contact with each other, It was possible to supply the slurry to all of the filter plates. In this case, however, the effect of filtration and dehydration is very low, and the process time is long as well as non-uniform.

This is because the slurry is simultaneously supplied to all the filter plates 4 during the filtration process. If the performance of the filter plate 4 is lowered due to clogging of the filter plates 4, etc., the slurry can not be supplied to the remaining filter plates 4 , And if all the filter plates 4 are not filled with the slurry, the pressure is insufficient and the slurry is not spouted with a strong force so that the filtration process can not be performed while passing through the filter cloth.

On the other hand, the automatic pressure filtration apparatuses according to the related art have cleaning apparatuses for washing filter cloths. However, there is a possibility that contaminants may remain in the filter cloth due to the simple washing with washing water, which may cause secondary contamination of the filtrate upon reuse.

Also, in the conventional automatic squeezing filters, the filter plates are arranged horizontally, but in the case of the horizontal automatic squeezing filter, the volume is large and occupies a large occupied space.

1, when the scrapers are scraped to remove the sludge deposited on the outer surface of the filter cloth passing through the upper end of the filter plate, the sludge desorbed from the filter cloth is disposed between the filter plates There is a problem that the filter cloth is re-contaminated and the sludge can not be removed because the filter cloth falls. Therefore, the sludge must be removed from the lower end of the filter plate. In this case, the sludge must be deposited on the outer surface of the filter cloth passing through the lower end of the filter plate. Thereby performing only the function of pressing and conveying the filter cloth. For example, filtration of the process solution should not occur in the filter plate 70 placed between filter plates 80 on both sides in FIG. That is, in the case of a horizontal type automatic squeeze filter, the number of filter plates participating in filtration is reduced to half, which lowers filtration efficiency.

The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for separating sludge deposited on a filter cloth and easily cleaning the filter cloth, thereby preventing secondary contamination of the filtrate upon re- It is intended to provide an automatic squeeze filter.

Since the inlet port for supplying the process liquid to the filter plate and the outlet port for discharging the cleaned filtrate through the filtering are respectively provided on the side of the filter plate, the process liquid can be supplied independently for each filter plate, Which is capable of selectively using an optimized number of filter plates at the same time as reducing the number of filter plates.

The present invention also provides a multi-stage automatic squeeze filter capable of increasing the space efficiency by vertically arranging a plurality of filter plates, facilitating the removal of sludge, and using all of the filter plates for filtration to increase the filtration efficiency I want to.

According to an aspect of the present invention, there is provided a multi-stage automatic pressure filtration device including: a body; And a sludge inlet port through which the process solution containing sludge is introduced, and a squeezed and filtered process solution is discharged to the other sidewall of the main body. A plurality of filter plates each having an exhaust port for allowing the exhaust gas to pass therethrough; In order to filter the process liquid, the filter plate is moved upward from below to move the filter plates in close contact with each other, and after the filtration is completed, the filter plates are moved downward to separate the filter plates from each other A lifting and lowering driving unit 230; A filter cloth installed to pass the plurality of vertically arranged filter plates in a zigzag direction and closely arranged on an upper surface of the filter plates to filter sludge contained in the process solution supplied to the filter plate; A filter bag transferring part for moving the filter bag in one direction and the opposite direction for cleaning and reuse of the filter bag after completion of filtration; A process liquid supply unit for supplying the process liquid containing the sludge to the inlet of the filter plate; A filtrate discharging unit that receives filtrate filtered by the filter cloth through an outlet of the filter plate and discharges the filtrate to the outside; And a filter cloth washing unit for washing the contaminated filter cloth after the completion of filtration by washing water injection and ultrasonic vibration.

Here, the filter bag sending portion includes a first winding roller which is engaged with one end portion of the filter fabric on the upper side of the uppermost filter plate, is rotated in normal and reverse directions by a first drive motor, and winds up the filter fabric in one direction or in a reverse direction; A second winding roller which is coupled to the other end of the filter cloth at a lower side of the lowermost filter plate and rotated in normal and reverse directions by a second driving motor to wind the filter cloth in one direction or in a reverse direction; The filter cloth is disposed on one side of the uppermost filter plate and rotates in engagement with the filter cloth wound or unwound by the first winding roller so as to guide the filter cloth in a state of being closely contacted with the upper surface of the filter plate, A first guide roller; And guide rollers provided on guide roller brackets coupled to ends of the filter plates disposed on the lower side of the uppermost filter plate so that the filter cloths passing through the first guide rollers are disposed in close contact with the upper surfaces of the filter plates, And a rotary roller provided at an end opposite to the adjacent filter plate so as to pass the filter plates in the zigzag direction.

A scrapper for scraping off the sludge deposited on the surface of the filter cloth to be conveyed by being engaged with the rotary roller is provided on the outer side of the rotary roller of each filter plate. The scrapper includes a scrapper mounting bracket Wherein the scroller mounting bracket has a lower end hingedly coupled to the guide roller bracket so as to be pivotable, and the upper end of the scroller mounting bracket is hinged to the lower end of the guide roller, The elastic spring is constituted by a tension spring and presses the scrapper mounting bracket toward the rotary roller by a restoring force to give a tension so that the scrapper can be brought into close contact with the surface of the filter cloth.

In addition, a lower lifting plate for lifting and lowering the filter plate by the lifting and lowering driving unit 230 is provided at a lower portion of the lowest filter plate, an upper fixing plate is provided at an upper portion of the uppermost filter plate, The filter plate and the upper fixing plate are connected to each other by a link. The hinge hole is hinged to the side of the adjacent filter plate adjacent to the adjacent filter plate. The filter plate and the upper fixing plate are connected to the side surface of the filter plate and arc- A curved long hole is formed.

The lifting and lowering driving unit 230 is installed between the main body and the lower lifting and lowering plate. The lifting and lowering driving unit 230 is expanded and contracted by the hydraulic pressure to raise and lower the lifting plate and the plurality of filter plates connected thereto. And a hydraulic pressure supply unit for supplying the hydraulic pressure required for the expansion and contraction operation of the hydraulic cylinder.

Also, the filter cleaning unit may include a cleaning tank for temporarily storing the contaminated filter fabric after filtration for cleaning; A rotary drum disposed in the washing tank in a transverse direction and rotated through a rotary roller provided on the lowermost filter plate to be engaged with a filter cloth drawn into the washing tank and switching the proceeding direction so that the filter cloth is drawn out of the washing tank; ; An injection nozzle for injecting washing water onto the surface of the filter cloth drawn into the washing tank; A washing water pipe connected to the injection nozzle; A washing water supply pump for supplying washing water for washing the filter cloth to the spray nozzle through the washing water pipe; And ultrasonic vibration means for vibrating the filter cloth to remove residual contaminants in the filter cloth as the ultrasonic waves are generated in the washing tank.

Here, the ultrasonic vibration means may be provided inside the washing tank.

Preferably, the ultrasonic vibrator includes a first ultrasonic vibrator, wherein the first ultrasonic vibrator is installed inside the rotary drum.

The first ultrasonic vibrator is installed in the center of the rotary drum in the longitudinal direction. A drum shaft having a circular section is protruded from both left and right sides of the rotary drum, and the drum shaft is rotatably mounted on the outer side of the drum shaft. And a fixing shaft is provided on the outer side of the bearing, and the fixing shaft is penetrated to the outside of the washing tank and then fixed by a fixing member.

In addition, a space for inserting the first ultrasonic vibrator may be formed in the center of the rotary drum. In order to insert the first ultrasonic vibrator from one side of the rotary drum, It is preferable that an inserting hole communicating with the space portion of the housing is formed. In addition, the contour of the space of the first ultrasonic vibrator and the rotary drum may be angled so that the first ultrasonic vibrator can not rotate or flow independently within the rotary drum.

Further, in order to supply power to the first ultrasonic vibrator installed in the rotary drum, a through hole is formed at the center of the drum shaft of the rotary drum, the bearing, the cover, and the fixing member so that a power- .

Further, it is preferable that a second ultrasonic vibrator is further attached to the outside of the washing tank.

The filter cleaning unit may include a recovery pipe connected to a lower portion of the cleaning tank for discharging the cleaning solution to the process solution supply unit for re-filtering the cleaning solution sprayed from the inside of the cleaning tank to clean the filter fabric; A valve for controlling the return pipe; And a level sensor installed inside the washing tank to sense a level of water in the washing tank; The valve is closed when the level of the inside of the cleaning tank detected by the level sensor is lower than a predetermined high level and the valve is opened when the level of the water reaches a predetermined high level so that the cleaning liquid in the cleaning tank is recovered through the recovery pipe .

In the present invention as described above, not only the filter cloth is arranged in a staggered manner between a plurality of filter plates, but also the filter plates are connected to each other through the link, so that the movement of all the filter plates is uniform and stable, Can be efficiently removed.

In addition, after filtration, the filter cloth is washed with high-pressure washing water and an ultrasonic vibrator to remove residual contaminants in the filter cloth, thereby preventing secondary contamination of the filtrate by residual contaminants when the filter cloth is reused.

In addition, since the inlet port for supplying the process liquid to the filter plate and the outlet port for discharging the cleaned filtrate through the filtering are respectively provided on the side surfaces of the filter plate, the process liquid can be supplied independently for each filter plate , The filtration process time can be shortened and an optimized number of filter plates can be selectively used.

Further, the plurality of filter plates are arranged vertically, which is advantageous in that the space efficiency is excellent.

1 is a view showing a conventional filter bag transfer type automatic squeezing filter.
FIG. 2 is a view showing a filtration plate transfer device of an automatic pressure filtration device according to the prior art.
FIG. 3A is a front view of a multi-stage automatic pressure filtration apparatus according to the present invention,
FIG. 3B is a side view of the multi-stage automatic pressure filter according to the present invention,
FIG. 3c is a view showing a state in which the filter plates of the multi-stage automatic pressure filtration filter according to the present invention are in an upwardly close contact state,
4 is a first embodiment showing a filter plate of a multi-stage automatic pressure filtration filter according to the present invention.
5 is a second embodiment showing a filter plate of a multi-stage automatic pressure filtration filter according to the present invention.
6 is a third embodiment of a filter plate of a multi-stage automatic pressure filtration filter according to the present invention.
7 is a fourth embodiment showing a filter plate of a multi-stage automatic pressure filtration filter according to the present invention.
8 is a fifth embodiment showing a filter plate of a multi-stage automatic pressure filtration filter according to the present invention.
Fig. 9 is a view showing a preferred embodiment of the filter cloth washing section of the multi-stage automatic pressure filtration filter according to the present invention,
10 is an operational flowchart of a multi-stage automatic pressure filtration device according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multi-stage automatic pressing filter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, the object to be filtered, such as wastewater or slurry, will be referred to as a "process liquid", suspended solids contained in the process liquid will be referred to as "sludge", and the sludge will be removed Is referred to as a 'filtrate', but it is obvious that it is not limited to this name.

Meanwhile, the multi-stage automatic pressure filtration filter according to the present invention is mainly characterized in that it has an ultrasonic cleaning function, and the ultrasonic cleaning function can be applied to any horizontal or vertical automatic pressure filtration device. However, in the present invention, since the vertical type automatic squeezing filter has high sludge removal and filtering efficiency, it is mainly applied to the vertical type automatic squeezing filter, and the ultrasonic cleaning function is applied to the horizontal automatic squeezing filter It is to be understood that the invention is not limited thereto.

3A and 3B, a multi-stage automatic pressure filtration apparatus according to the present invention includes a body 210, a filter plate 220, an elevation driving unit 230, a filter fabric FC, a filter cloth transfer unit 240, A liquid supply portion 250, a filtrate discharge portion 260, and a filter cleaning portion 280.

The body 210 supports the entire structure of the multi-stage automatic pressure filtration filter according to the present invention from below, and includes various hydraulic equipment such as a pressure switch, a pressure regulator, and the like for moving the filter plate 220, And other equipment.

The filter plate 220 is a plate member for separating the sludge contained in the process liquid by squeezing the supplied process solution. As shown in FIG. 3A, the filter plate 220 includes a plurality of vertically arranged multi- The filter plates 220 are movable upward or downward to be in close contact with each other as they are raised during the supply of the process liquid so as to carry out pressure filtration. After completion of the filtration, the filter plates 220 are separated from each other, Respectively.

In order to perform this operation, the filter plates 220 are connected to each other by a link 224, and are configured to be moved up and down by a lifting and driving unit 230 described later.

More specifically, a lower lifting plate 214 for lifting and lowering the filter plate 220 by a lift driving part 230 described later is provided at a lower portion of the lowermost filter plate 220 of the filter plate 220, An upper fixing plate 216 is provided at an upper portion of the uppermost filter plate 220. The lower lifting plate 214 and the plurality of filter plates 220 and the upper fixing plate 216 are interconnected by a link 224.

The hinge hole 224a hinged to the side of the adjacent one filter plate 220 and the hinge hole 224a coupled to the side of the other filter plate 220 are formed on the link 224 such that the fastener 224b is movably fitted A long hole 224c is formed. The elongated hole 224c is curved in an arc shape.

With such a configuration, the link plates 224 between the filter plates 220 are rotated at appropriate angles, and the filter plates 220 are moved up and down to be closely contacted with each other and separated from each other. 3C shows a state in which the filter plates 220 are in close contact with each other.

Meanwhile, when the process fluid is supplied to the filter plate 220 between the sealed filter plates 220, the sludge contained in the process fluid (that is, S are filtered by the filtering cloth FC so that the sludge S is left in the space between the filter plates 220 and only the filtrate flows out to the outside. That is, mechanical filtration and filtration of the process liquid as wastewater is performed.

For this, an inlet port through which the process liquid flows into one side surface of each filter plate 220 is provided, and an outlet port through which the process liquid filtered and filtered is discharged, respectively.

As shown in FIG. 4, in the case of a double filter type filter plate, the first plate 220a and the second plate 220a are separated from each other, 220b are constituted as one set. 4 (a) shows the first plate 220a, and FIG. 4 (b) shows the second plate 220b. In the case of using such a duplex filter plate, for example, an inlet IN is provided on a side surface of the first plate 220a and a discharge port OUT is provided on a side surface of the second plate 220b.

The plate body 221a of the first plate 220a is provided with a first internal flow passage 223a through which the process liquid supplied to the inlet IN flows, Shaped space 222a (also referred to as a chamber) through which the process liquid is discharged to the outside, and the first internal flow path 223a is connected to the space portion 222a. The number, the shape, and the position of the first internal flow path 223a connected to the space portion 222a are not particularly limited. That is, although the first internal flow path 223a is connected to the space portion 222a through three flow paths in FIG. 4, a number of flow paths exceeding the first internal flow path 223a may be used.

A second inner flow path 223b through which the filtrate flows can be disposed inside the plate body 221b of the second plate 220b and a suction hole 222b through which the filtrate flows (or sucked) And the second inner flow path 223b connects the suction hole 222b and the discharge port OUT.

The surface of the first plate 220a of the one filter plate 220 and the rear surface of the second filter plate 220b of the other filter plate 220 are in contact with each other, The filter cloth FC is inserted between the front surface of the first plate 220a and the rear surface of the second plate 220b so that the filtration of the process liquid is performed as described above.

That is, when the process liquid is sequentially passed through the inlet IN and the first internal flow path 223a and the space portion 222a and then discharged into the space portion 222a of the first plate 220a, Since the sludge S can not pass through the filter fabric FC, the sludge S is accumulated between the space portion 222a of the first plate 220a and the filter fabric FC and the filtrate from which the sludge S has been removed is passed through the filter fabric FC . The filtrate having passed through the filter fabric FC flows into the suction hole 222b of the second plate 220b and is discharged to the discharge port OUT through the second inner flow path 223b.

The filtrate discharged in this manner is collected through the filtrate discharging portion 260 and discharged to the outside. Of course, the sludge S collected between the first plate 220a and the filtration filter 241 is also removed after completion of the filtering process for a predetermined time, but a description thereof will be described later.

In the meantime, according to the present invention, an inlet (IN) through which the process liquid flows into the side surface of the filter plate (220) and a discharge port (OUT) through which the filtrate is discharged are provided, so that all the filter plates And to perform an independent filtration process. Therefore, there is no particular limitation on the structure of the filter plate 220 as long as the inlet IN and the outlet OUT can be provided on the side of the filter plate 220.

For example, as shown in FIG. 5, the double filter plates 310a and 310b are applied, and a space 312a is formed on the entire surface of the plate body 311a of the first plate 310a as shown in FIG. 5 (a) And has two inlets (IN) and two first internal passages (313a), so that the process liquid can be supplied from two places at the same time. Of course, preferably, the second plate 310b corresponding to the second plate 310b is provided with a suction hole 312b on the rear surface of the plate body 311b so that the filtrate can be simultaneously discharged from two places, and two outlets OUT and 2 It is preferable that each of the first and second internal flow paths 312b is provided.

However, the inlet IN has three outlets OUT and the inlet IN and the outlet OUT have a single outlet. In this case, It is obvious that the number may be changed in various ways.

In addition, as another example of the filter plate 220, a single filter plate may be used in addition to the above-described double filter plate. The single filter plate 220 includes a first plate 220a and a second plate 220b, In the case of the single-piece filter plate integrally formed as such, the inlet IN and the outlet OUT are respectively installed on the side of the single-stage filter plate.

6, a groove-shaped space portion 322 is formed on the front surface of the plate body 321 of the fast filter plate, a suction hole 323 is formed on the rear surface thereof, And the inlet OUT is connected to the space 322 through the first inner flow path 324 and the outlet OUT is connected to the suction hole 323 through the second inner flow path 325, .

Of course, although the illustration is omitted, it is also possible to provide a plurality of the inlet IN and the outlet OUT in the case of such a single filter plate, or to provide only one of the inlet IN and the outlet OUT, The possibility is obvious.

Further, in the present invention, it is preferable that an air bladder 333, which is inflated by the inflow of air from the outside, is attached to the space portion 332 provided in the filter plate 330 as shown in FIG. The air bag 333 swells up during the air injection so that the sludge S accumulated between the filter cloth FC and the filter plate 330 is further compressed and the sludge S deposited on the filter plate 220 is well separated To the filter cloth (FC) side. The sludge S is deposited only in the filter fabric FC and not in the filter plate 330. The sludge S deposited on the filter fabric FC can be removed after being dried in a cake state by compression, The residual sludge S deposited on the filter plate 330 is difficult to clean.

For example, when the air bag 333 is provided in the double-layer filter plate 330, the space portion 332 is formed in a predetermined groove shape in the plate body 331 of the first plate as shown in FIG. 7 (a) The air bag 333 is firmly installed (or attached) in the space portion 332 to prevent the air bag 333 from being separated.

The inlet IN through which the process liquid is injected is connected to the space portion 332 through the first inner flow path 334 and the air inlet IN_A through which the air is supplied flows through the third inner flow path 335 And is connected to the air bag 333. Air supplied to the air inlet IN_A is regulated to be supplied through a valve (not shown).

7 (b), when the air is supplied to the air inlet IN_A by opening the valve, the air bag 333 is swollen and the remaining sludge (air) accumulated in the space 332 of the first plate S) to be removed. Although not shown in FIG. 7 (b), one side of the sludge S is in a state of being deposited on the filter cloth FC.

Similarly, in the case where the air bag 343 is provided in the fast filter plate 340 as shown in Fig. 8, the air bag 343 shown in Fig. 8 (a) before the air bag 34 is inflated and the air bag 343 after the air bag 343 is swollen The air bag 343 is installed in the space portion 342 formed on the front surface of the plate body 341 as shown in FIG. The air inlet IN_A is spaced apart from the inlet IN and the outlet OUT when one inlet plate IN and the outlet OUT and the air inlet IN_A are provided in one filter plate 220 Air is injected only into the air bag 343, and a duplicate description of the other reference numerals in FIG. 8 will be omitted.

3A and 3B, the lifting drive unit 230 will be described. The lifting and lowering drive unit 230 pushes the filter plate 220 upward to move the filter plates 220 in close contact with each other and moves the filter plate 220 downward after completion of filtration And includes a hydraulic cylinder 232 and a hydraulic supply unit 234 for separating the filter plates 220 from each other.

The hydraulic cylinder 232 is installed between the main body and the lower lifting plate 214 and moves up and down the lifting plate and the plurality of filter plates 220 connected thereto as it expands and contracts due to hydraulic pressure. More specifically, as shown in FIG. 3A, a lower support 212 is provided on the upper portion of the main body, a hydraulic cylinder 232 is supported on the upper surface of the lower support 212, and a hydraulic cylinder 232 (The cylinder rod) is coupled to the lower surface of the lower lifting plate 214. As shown in Fig.

The hydraulic pressure supply unit 234 is a part that provides the hydraulic pressure required for the expansion and contraction of the hydraulic cylinder 232 and includes an oil tank, a motor, a pump, a solenoid valve, and a check valve.

Therefore, when the hydraulic cylinder 232 is operated, the hydraulic cylinder 232 is inflated and the lower lift plate 214 is moved to the lower position by supplying hydraulic pressure from the hydraulic supply unit 234 to the hydraulic pressure supporter in accordance with the control signal of the controller 270. [ The lower lifting plate 214 pushes up the filter plate 220 so that all the filter plates 220 are in close contact with each other. When the upper and lower surfaces of the filter plates 220 are in close contact with each other, the process liquid supplied to the inside of the filter plates 220 is prevented from leaking out, And passes through the filter fabric FC.

The elevation driving unit 230 may further include a guide unit 236. The guide means 236 includes a guide rod 236a and a slide bush 236c as means for steadily and smoothly guiding the lifting and lowering of the lower lifting plate 214 and the filter plate 220. [

3A, the guide rods 236a are vertically arranged on the outer side of the filter plate 220 arranged in a multi-stage manner, and the upper ends of the guide rods 236a are inserted into the fixing bush 236b, 216 and the lower end thereof is fixedly coupled to one side of the lower support table 212 while being inserted into the fixed bush 236b. The guide rod 236a is inserted into one side of the lower lifting plate 214 and the filter plate 220 which are moved up and down according to the operation of the hydraulic cylinder 232 and slide along the guide rod 236a The movable slide bush 236c is engaged. The slide bush 236c is generally called a 'linear bushing', and a plurality of balls are provided therein to reduce friction with the guide rod 236a to smoothly move the slide.

When the lower lifting plate 214 and the plurality of filter plates 220 are lifted and moved, the lower lifting plate 214 is lifted and lowered as the slide bush 236c is slid along the guide rod 236a. And the filter plate 220 are secured.

On the other hand, as already mentioned, a filter fabric FC is interposed on the outside of the filter plate 220. The filter fabric FC is installed to pass through a plurality of vertically adjacent filter plates 220 in a zigzag direction, and functions to filter the sludge S contained in the process solution. The filter cloth FC is configured to be moved in one direction by the filter bag transfer unit 240 and then moved backward.

3A and 3B, the filter bag transferring unit 240 includes a first winding roller 241, a second winding roller 246, a first guide roller 243, and a rotary roller 244. The first winding roller 241, the second winding roller 246,

The first winding roller 241 is a means for winding the filter cloth FC upwardly or reversely in one direction from the upper side of the uppermost filter plate 220. The first winding roller 241 is a bracket coupled to one side of the upper fixing plate 216 (Not shown). More specifically, the first winding roller 241 is provided with a driven pulley 241b at one end of its rotating shaft 241a and a speed reducer 241b connected to the motor shaft of the first driving motor 242, The driving pulley 242b of the first driving roller 242a and the driven pulley 241b provided on the rotating shaft 241a of the first winding roller 241 are connected by the first belt 242c, The filter cloth FC is wound or wound.

On the other hand, the second winding roller 246 is a bracket coupled to one side of the lower support table 212 as a means for winding up or unfolding the filter fabric FC in one direction from the lower side of the lowermost filter plate 220 Not shown) and rotated. More specifically, the second winding roller 246 is provided with a driven pulley 246b at one end of its rotating shaft 246a, and a speed reducer (not shown) connected to the motor shaft of the second driving motor 247, The driving pulley 247b of the second driving roller 247a and the driven pulley 246b provided on the rotating shaft 246a of the second winding roller 246 are connected by the second belt 247c, The filter cloth FC is wound or unwound.

Here, the actions of the first winding roller 241 and the second winding roller 246 are opposite to each other. More specifically, when the first winding roller 241 releases the filter cloth FC (unwound), the second winding roller 246 is unwound and winds the wound filter cloth FC (wound). Then, the first winding rollers 241 wind the filter cloth FC on which the second winding roller 246 has been wound (unwound) (wound). According to this method, the filter cloth FC can be moved in one direction and in the opposite direction.

On the other hand, the filter cloth FC which is moved in the one direction and the reverse direction while being wound or unwound by the first winding roller 241 and the second winding roller 246 includes a plurality of vertically multi-stage filter plates 220 arranged in the zigzag direction And is closely disposed on the upper surface of each filter plate 220 and moved. Rollers for guiding the movement of the filter cloth FC are mounted on the filter plates 220 for movement in the zigzag direction and in close contact with the filter plate 220.

A first guide roller 243 is disposed on one side of a filter plate disposed on the uppermost layer among a plurality of vertically multi-stage filter plates 220, as shown in Figs. 3A and 3B. The first guide roller 243 is rotatably mounted on a first guide roller bracket 243a provided at one side of the uppermost filter plate and is wound around the first filter roller 241 And the filter cloth FC is disposed on the upper side of the filter plate 220 so as to guide the filtration cloth FC in the direction of the filter cloth 220. [ So that it can be passed through.

The filter cloth FC having passed through the first guide roller 243 is closely contacted with the upper surface of each filter plate 220 by the rotary roller 244 provided at the end of each filter plate 220, . More specifically, the rotary rollers 244 are installed at one end of each filter plate 220, and are installed at opposite ends of the adjacent filter plates to guide the filter cloth FC in the zigzag direction. That is, as shown in FIG. 3A, the uppermost filter plate is provided with a first guide roller 243 on the right side and the rotary roller 244 is provided on the left side. On the lower filter plate adjacent to the uppermost filter plate, And a rotary roller 244 is provided on the right side. The lower filter plate is provided with a rotary roller 244 on the right side.

The rotary roller 244 is rotatably installed by a rotary roller bracket 244a provided on one side of each filter plate 220. The uppermost and lowermost points of the outer circumferential surface of the rotary roller 244 are the height So that the filter cloth FC is closely disposed on the upper surface of each filter plate 220 and is moved.

Scrapers 245 are provided on the outside of the rotary rollers 244 of the filter plates 220. The scrapper 245 is formed as a blade and scrapes and removes sludge adhering to the surface of the filter fabric FC conveyed by the rotary roller 244 to be transferred to the end of each guide roller bracket 244, The scraper mounting bracket 245a is installed vertically on the scraper mounting bracket 245a. The scraper mounting bracket 245a is disposed on the outer side of the guide roller 242 and has an end inclined upwards at an angle to the outer peripheral surface of the rotary roller 244. The lower end of the scrapper mounting bracket 245a is hinged to the guide roller bracket and the upper end thereof is connected to the guide roller bracket by an elastic spring 245b. The elastic spring 245b is constituted by a tension spring and presses the scrapper mounting bracket 245a toward the rotary roller 244 by a restoring force so that the scrapper 245 is tensioned so as to be brought into close contact with the surface of the filter cloth FC .

As a plurality of filter plates are arranged in a vertically multi-stage and scrapers are mounted on the horizontal end side of each filter plate, the sludge that has been removed is dropped outwardly and is easily removed and does not contaminate filter bags or other devices.

On the other hand, the filter cloth FC that has passed through the rotary roller 244 provided on the lowermost filter plate is drawn downward and is wound on the second winding roller 246 via the second guide roller 248. Here, the second guide roller 248 is a roller for applying tension to the filter fabric FC and changing the proceeding direction, and there is no particular limitation on the number and arrangement of the rollers FC. However, as shown in FIG. 3A, FC), it is preferable to provide one on each of the right and left sides in order to guide the cleaning device to the cleaning device.

3B, the process liquid supply unit 250 supplies the process liquid in which the sludge S is mixed with the inlet IN of the filter plate 220, A supply hose 252 connected to the supply header 251 at one end and connected to an inlet IN of the filter plate 220 at the other end, A process liquid supply pump 254 for supplying and pressurizing the process liquid and a supply line 256 for transferring the process liquid pressurized by the process liquid supply pump 254 to the supply header 251.

3B, the supply header 251 is vertically disposed on one side of the filter plate 220 and supplied to the lower end from the process liquid supply pump 254 through a supply line 256 A process liquid intermittent valve 251a for interrupting the inflow of the process liquid and a compressed air intermittent valve 251b for interrupting inflow of the compressed air are provided at the upper end.

The process liquid intermittent valve 251a is provided in the supply header 251 of the process liquid supply unit 250 to control the supply of the process liquid to be supplied to the filter plate 220. [ The compressed air intermittent valve 251b is opened when the process liquid intermittent valve 251a is closed. The process liquid intermittent valve 251a is closed to stop the supply of the process liquid, and instead, the high pressure air for drying is supplied. The high-pressure air flows along the same path as the process liquid and is injected into the sludge S deposited on the filter fabric FC. So as to further lower the water content by spraying the sludge S with high-pressure air.

The process liquid supplied from the supply header 251 is transferred to the inlet IN of the filter plate 220 through the supply hose 252 while the filter plate 220 is in close contact with the filter plate 220, 220 are filtered as described above. The sludge S is removed through filtration, and the filtered filtrate is discharged to the outside through the filtrate discharging portion 260.

Particularly, in the present invention, the number of the supply hoses 252 connected to the supply header 251 is equal to the number of the filter plates 220, and each supply hose 252 is connected to the inlet IN of the filter plate 220 The process liquid supplied through the process liquid supply unit 250 is supplied to the plurality of filter plates 220 independently.

That is, in the present invention, the inlet (IN) for supplying the process liquid and the discharge outlet (OUT) for discharging the filtrate are provided on the side of the filter plate (220), respectively, (Not shown). Of course, a valve (not shown) may be provided in the supply hose 252 to determine whether or not the process liquid is supplied for each supply hose 252.

Therefore, even if the characteristics of any one filter plate 220 is reduced, the present invention does not affect the performance of the other filter plate 220, thereby maintaining high performance as a whole and shortening the processing time. In addition, a valve is provided in each supply hose 252 to individually adjust the supply of the process liquid, so that the filter plate 220 to be used in the filtration process can be selected.

Therefore, in order to supply the process liquid in a state in which the filter plates 220 are in close contact with each other, the inlet IN and the outlet OUT are provided on the front surface and the rear surface of the filter plate 220, Since the process liquid sequentially fills all the filter plates 220, the entire process is affected when any one of the filter plates 220 is abnormally generated. The present invention solves this problem.

The filtrate discharging portion 260 receives the filtrate filtered by the filter fabric FC through the discharge port OUT of the filter plate 220 and discharges the filtrate to the outside. As shown in FIG. 3B, And a discharge hose 262 connected at one end to the discharge header 261 and at the other end to an outlet OUT of the filter plate 220. Here, the discharge header 261 is arranged vertically on the opposite side of the supply header 251, and a discharge line 264 for discharging the filtrate to the outside is connected to the lower end.

3B, the cleaned filtrate is filtered by the filter plate 220 to be delivered to the discharge hose 262 through the discharge port OUT of the filter plate 220, The filtrate discharged into the discharge header 262 is collected in the discharge header 261 and discharged to the outside through the discharge line 264. [ Of course, if necessary, the filtrate may be secondarily treated to remove the harmful substances more completely and discharge the same.

The filter fabric cleaning unit 280 is installed on one side of the body 210 and cleans the filter cloth FC by spraying high pressure cleaning water toward the filter fabric FC moving in a contaminated state with sludge or the like.

The sludge S deposited on the filter cloth FC is removed by the scrapper 245 provided outside the rotary roller 244 when the filtration cloth 241 is moved in a state where the filter plates 220 are spaced apart, The residual filter sludge S and various contaminants may be adhered to the filter fabric FC even in such a case. Therefore, the filter fabric is cleaned by the filtration filter cleaning unit 280 for reuse of the filter fabric FC will be.

The filter cleaning unit 280 includes a cleaning tank 281, a cleaning water supply pump 284, a cleaning water pipe 285, an injection nozzle 283, and an ultrasonic vibration unit 286, as shown in FIG. do.

The cleaning tank 281 temporarily stores the contaminated filter cloth FC for cleaning. The upper portion of the filter tank 28 is opened and the lower portion thereof is formed so as to be narrowed downward so that the cleaning liquid used for cleaning can be smoothly collected and discharged. Inside the washing tank 281, a rotary drum 282 is disposed in the lateral direction. 3A, the filter fabric FC having passed through the lowermost rotary roller is drawn into the washing tank 281 through the second guide roller 248, and is engaged with the rotary drum 282 to be circumscribed, And is drawn out to the outside of the washing tank 281 and wound around the second winding roller 246.

In this way, a jetting nozzle 283 is provided at one side of the filter fabric FC which is drawn into the cleaning tank 281 and moves. The jetting nozzle 283 is means for jetting high-pressure cleaning water onto the surface of the contaminated filter fabric FC, and a plurality of the filters are arranged in a line along the width direction of the filter fabric FC. The spray nozzle 283 is connected to the washing water pipe 285 and the washing water pipe 285 is connected to the washing water supply pump 284 to supply the washing water to the spray nozzle 283, Respectively. The wash water supply pump 284 pressurizes the wash water stored in the outside and supplies the wash water to the spray nozzle 283 through the wash water pipe 285 so that the high pressure wash water is sprayed from the spray nozzle 283.

It is preferable that an ultrasonic vibration means 286 is additionally provided in the washing tank 281. Although the filter fabric FC can be cleaned by the cleaning water jetted from the injection nozzle 283 at a high pressure, contaminants such as sludge may remain in the filter fabric FC even after washing with the washing water. In order to completely remove such residual contaminants, in the present invention, the ultrasonic vibration means 286 is adopted to remove residual contaminants as the filter cloth FC is shaken by the ultrasonic vibration.

Since the washing liquid sprayed from the inside of the washing tank 281 and used for cleaning the filter cloth FC is contaminated with contaminants such as sludge, it is preferably recovered so as to be filtered again together with the process liquid without being directly discharged to the outside. 3B, a return pipe 287 is connected to the lower portion of the washing tank 281. As shown in FIG. The recovery pipe 287 is connected to the process liquid supply pump 254 so that the recovered cleaning liquid is pressurized by the process liquid supply pump 254 together with the process liquid newly introduced for filtration, And the supply header 251 to the filter plates 220, the filter is re-filtered. In this case, a valve 287a is provided in the return pipe 287, and a level sensor 281a is provided in the washing tank 281. When the water level in the washing tank 281 is lower than a predetermined high level, The valve 287a is closed, and when the water level reaches a predetermined high value, the valve 287a is opened so that the washing liquid in the washing tank 281 can be discharged through the return pipe 287. [

Meanwhile, as shown in FIG. 3B, it is preferable that the discharge header 261 is further provided with a branch pipe 266. One end of the branch pipe 266 is connected to the discharge header 261 and the other end is connected to the washing tank 281. The branch pipe 266 is provided with a branch valve 266a. Normally, the filtrate is discharged to the outside through the discharge header 261 and the discharge line 264. When it is judged that the filtrate is not sufficiently filtered and there is a large amount of the remaining contaminant, the branch valve 266a is opened and the branch The filtrate flowing into the washing tank 281 is transferred to the process liquid supply pump 254 through the recovery pipe 287 to be re-filtered do.

9, another embodiment of the filter cleaning unit 280 is shown. 9 (a) is a front sectional view of the filter cleaning unit 280, and FIG. 9 (b) is a side sectional view of the filter cleaning unit 280. FIG. The structure of this embodiment is mostly common to that of the filter cloth cleaning unit 280 described above, and the structure of the ultrasonic vibration means 286, which is a difference here, will be mainly described, and a description of common portions will be omitted.

9, the filter cleaning unit 280 according to the present embodiment includes a filter fabric FC wound around the second winding roller 246 after flowing into the cleaning tank 281 from the rotary roller 244, The first ultrasonic vibrator 286a is installed inside the rotary drum 282 in which the filter cloth FC is rotated to rotate and the second ultrasonic vibrator 286 is installed as a further ultrasonic vibration means 286. [ And the vibrator 286b is installed outside the cleaning tank 281. [

More specifically, a first ultrasonic vibrator 286a is embedded in the center of the rotary drum 282 in the longitudinal direction of the rotary drum 282. A drum shaft 282a having a circular section is protruded from both left and right sides of the rotary drum 282. A bearing B for rotatably supporting the drum shaft 282a is disposed outside the drum shaft 282a. . A fixing shaft BX is provided on the outer side of the bearing B and the fixing shaft BX is penetrated outside the cleaning tank 281 and fixed by a cover C and a fixing member F .

A space for inserting the first ultrasonic vibrator 286a may be formed in the center of the rotary drum 282. The first ultrasonic vibrator 286a may be inserted into the rotary drum 282 from a side of the rotary drum 282, An insertion hole (not shown) communicating with a space inside the rotary drum 282 is formed through the one side drum shaft 282a of the rotary drum 282. 9 (a), the first ultrasonic vibrator 286a and the rotary drum 282 are spaced apart from each other such that the first ultrasonic vibrator 286a rotates inside the rotary drum 282 It is preferable to prevent rotation or flow independently of each other.

The drum shaft 282a of the rotary drum 282 and the bearing B, the cover C and the fixing member 282a are connected to the first ultrasonic vibrator 286a mounted in the rotary drum 282, F are formed with through holes at the center so that electric wires for supplying power can be installed.

The filter cloth FC drawn into the washing tank 281 is cleaned by the injection nozzle 283 and then rotated by the rotary drum 282 vibrating by the first ultrasonic vibrator 286a Residual contaminants can be additionally removed by vibrations transmitted while engaged and circumscribed. Although the rotary drum 282 and the ultrasonic vibration means 286 are spaced apart from each other and the vibration may not be transmitted to the filter fabric FC in the previous embodiment, in the present embodiment, the first ultrasonic vibrator 286a), the vibration is transmitted to the filter cloth (FC) relatively well, and the effect of desorbing the pollutant will be great.

9 (a), the second ultrasonic vibrator 286b is attached to the outside of the cleaning tank 281 to cause vibration in the cleaning tank 281 itself, so that the contaminants of the filter fabric FC Removal can be assisted.

Hereinafter, the operation of the multi-stage automatic pressure filtration device according to the present invention having the above-described structure will be described. 10, the operation sequence of the multi-stage automatic pressure filtration filter according to the present invention is sequentially shown.

First, as shown in FIG. 3A, the hydraulic cylinder 232 is initially in a contracted state, so that the filter plates 220 are spaced apart from each other. On the upper surface of each filter plate 220, a filter cloth FC is closely arranged. When the hydraulic cylinder 232 is expanded (ST1) to filter the process liquid, the lower lifting plate 214 rises to pressurize the filter plate 220, The filter plates 220 are lifted while the filter plates 224 are turned, and the filter plates 220 are in close contact with each other and sealed (ST2) as shown in Fig. 3C. The process liquid supply pump 254 is operated so that the filter plates 220 are connected to the filter plate 220 through the supply line 256 and the supply header 251 and the supply hose 252, . The sludge in the process liquid supplied to the filter plate 220 is deposited on the surface of the filter fabric FC and the filtrate is discharged to the outside through the discharge header hose 262, the discharge header 261 and the discharge line 264 ST3). When the filtration is completed, the hydraulic cylinder 232 contracts (ST4) and the filter plates 220 descend and are separated from each other (ST5). Then, the first winding roller 241 and the second winding roller 246 rotate in one direction to move the filter cloth FC (ST6), and the filter cloth FC is attached to the outside of each rotary roller 244 The sludge deposited on the filter cloth FC by the scrapper 245 is primarily removed. The filter cloth FC flows into the washing tank 281 and is washed with the high pressure washing water sprayed from the spray nozzle 283, and the remaining contaminants are removed by the ultrasonic vibration means 286 (ST7). When the cleaning of the filter cloth FC is completed, the second winding roller 246 and the first winding roller 241 are reversely rotated to move the filter cloth FC in the reverse direction and return to the initial state (ST8).

The specific embodiments of the present invention have been described above. It is to be understood, however, that the scope and spirit of the present invention is not limited to these specific embodiments, and that various modifications and changes may be made without departing from the spirit of the present invention. If you have, you will understand. Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

210: body 220: filter plate
230: a lifting opening part 240: a filter bag sending part
241: Filter cloth 250: Process liquid supply unit
260: filtrate discharge unit 270: controller
280:

Claims (15)

A plurality of filter plates 220 are arranged in multiple stages and a filter fabric FC is disposed between the filter plates 220. The filter plates 220 are pressed to be in close contact with each other to squeeze and filter the sludge from the process solution, In the multi-stage automatic pressure filtration device,
Characterized in that the filter fabric (FC) is washed by washing water injection and ultrasonic vibration after filtration and sludge removal. The method according to claim 1,
The multi-stage type automatic squeezing filter is a vertical type automatic squeezing filter,
A body 210;
The sludge is introduced into the main body 210 through the inlet 210. The sludge is introduced into the main body 210 through the inlet 210. The sludge is introduced into the main body 210, A plurality of filter plates (220) each having an outlet for discharging the liquid;
In order to filter the process liquid, the filter plate 220 is moved upward from below to move the filter plates 220 in close contact with each other, and the filter plate 220 is moved downward A lifting and driving unit 230 for moving the filter plates 220 apart from each other;
The filter plate 220 is disposed so as to pass through the vertically multi-stage filter plates 220 in a zigzag direction. The filter plate 220 is disposed in close contact with the upper surface of the filter plates 220, A filter cloth FC for filtering out water;
A filtering cloth transfer unit 240 for moving the filter cloth FC in one direction and the opposite direction for cleaning and reuse of the filtering cloth FC after completion of filtration;
A process liquid supply unit 250 for supplying a process liquid containing sludge to an inlet of the filter plate 220;
A filtrate discharging unit 260 for supplying filtrate filtered by the filter fabric FC through an outlet of the filter plate 220 and discharging the filtrate to the outside;
And a filter cleaning unit (280) for cleaning the contaminated filter cloth (FC) by means of washing water injection and ultrasonic vibration after filtration is completed. 3. The method of claim 2,
The filter cloth transferring unit 240,
A first winding roller 241 which is engaged with one end of the filter cloth FC on the upper side of the uppermost filter plate and rotated in normal and reverse directions by the first driving motor 242 to wind the filter cloth FC in one direction or in a reverse direction, )Wow;
A second winding roller (not shown) which is engaged with the other end of the filter cloth FC at the lower side of the lowermost filter plate and rotated in normal and reverse directions by the second driving motor 247 to wind the filter cloth FC in one direction 246);
The filter cloth FC is disposed in close contact with the upper surface of the filter plate 220 as the filter cloth FC is disposed on one side of the uppermost filter plate and rotated with the filter cloth FC wound or unwound by the first winding roller 241, A first guide roller 243 for guiding and guiding the traveling direction so as to be passed through the first guide roller 243;
The filter cloths 220 that are provided on the guide roller brackets coupled to the ends of the filter plates 220 disposed below the uppermost filter plate 220, And a rotary roller 244 which guides the filter cloths FC to be disposed in close contact with the upper surface thereof and which is provided at an opposite end to the filter plate 220 adjacent to the filter plates 220 so as to pass through the filter plates 220 in a zigzag direction Which is a multi-stage automatic squeezing filter. The method of claim 3,
A scrapper 245 for scraping off the sludge deposited on the surface of the filter fabric FC conveyed by the rotary roller 244 is provided on the outer side of the rotary roller 244 of each filter plate 220, 245 are mounted on scrapper mounting brackets 245a vertically installed at the ends of the guide roller brackets and arranged side by side on the outer side of the guide rollers with their ends inclined upwards obliquely to the outer peripheral surface of the rotary roller 244 The lower end of the scrapper mounting bracket 245a is hinged to the guide roller bracket so as to be pivotable and the upper end thereof is connected to the guide roller bracket by an elastic spring 245b and the elastic spring 245b is connected to a tension spring And the scrapper mounting bracket 245a is pressed toward the rotary roller 244 by a restoring force so that the scrapper 245 is tensioned so as to be brought into close contact with the surface of the filter cloth FC The multistage automatic compression filter as claimed. The method of claim 3,
A lower lifting plate 214 for lifting and lowering the filter plate 220 by the lifting and lowering drive unit 230 is provided at the lower portion of the lowest filter plate and an upper fixing plate 216 is provided at an upper portion of the uppermost filter plate The lower lifting plate 214 and each filter plate 220 and the upper fixing plate 216 are interconnected by a link 224 and the link 224 is hinged to the side of the adjacent filter plate And a long hole (224c) formed to be curved in an arc shape is formed to be engaged with the hinge hole (224a) and the side surface of the other filter plate and the fastener (224b) movably fitted thereinto. 6. The method of claim 5,
The lifting and lowering driving unit 230,
A hydraulic cylinder 232 installed between the main body and the lower lifting plate 214 to move up and down the lifting plate and the plurality of filter plates 220 connected thereto as the lifting and contracting by the hydraulic pressure;
And a hydraulic pressure supply unit (234) for supplying the hydraulic pressure required for the expansion and contraction operation of the hydraulic cylinder (232). The method of claim 3,
The filter cleaning unit 280 includes:
A washing tank 281 for temporarily storing the contaminated filter cloth FC after filtration for cleaning;
The cleaning cloth 281 is rotatably disposed in the cleaning tank 281 in a transverse direction and is rotated by engaging with the filter fabric FC which is drawn into the cleaning tank 281 after passing through the rotary roller 244 provided on the lowermost filter plate, A rotary drum 282 for switching the proceeding direction to be drawn out of the washing tank 281;
An injection nozzle 283 for injecting wash water onto the surface of the filter fabric FC which is drawn into the inside of the washing tank 281;
A washing water pipe 285 connected to the injection nozzle 283;
A wash water supply pump 284 for pressurizing the wash water for cleaning the filter cloth FC and supplying the wash water to the spray nozzle 283 through the wash water pipe 285;
And an ultrasonic vibration means (286) provided in the cleaning tank (281) to remove residual contaminants in the filter fabric (FC) by vibrating the filter cloth (FC) as ultrasonic waves are generated. filter. 8. The method of claim 7,
Characterized in that the ultrasonic vibration means (286) is provided inside the washing tank (281). 8. The method of claim 7,
Wherein the first ultrasonic vibrator (286a) is installed inside the rotary drum (282), wherein the first ultrasonic vibrator (286a) is included as the ultrasonic vibration means (286). 10. The method of claim 9,
The first ultrasonic vibrator 286a is installed in the center of the interior of the rotary drum 282 in a longitudinal direction. A drum shaft 282a having a circular section is protruded from both left and right sides of the rotary drum 282, A bearing B for rotatably supporting the drum shaft 282a is coupled to the outer side of the drum shaft 282a and a fixing shaft BX is provided outside the bearing B, Is passed through the outside of the washing tank (281) and fixed by a fixing member (F). 11. The method of claim 10,
A space for inserting the first ultrasonic vibrator 286a may be formed in the center of the rotary drum 282 and the rotation of the rotary drum 282 may be changed so that the first ultrasonic vibrator 286a can be inserted from one side of the rotary drum 282. [ Wherein the one drum shaft (282a) of the drum (282) is formed with an insertion hole communicating with a space inside the rotary drum (282). 12. The method of claim 11,
The space contours of the first ultrasonic vibrator 286a and the rotary drum 282 are formed to be angular so that the first ultrasonic vibrator 286a can not rotate or flow independently within the rotary drum 282 Multistage automatic squeezing filter. 12. The method of claim 11,
The drum shaft 282a of the rotary drum 282 and the bearing B, the cover C and the fixing member F (not shown) are connected to the first ultrasonic vibrator 286a mounted in the rotary drum 282, Wherein a through hole is formed at the center so that a power line can be installed. 10. The method of claim 9,
And a second ultrasonic vibrator (286b) attached to the outside of the cleaning tank (281). 8. The method of claim 7,
A recovery pipe 281 connected to the lower part of the cleaning tank 281 for discharging the cleaning solution to the process solution supply unit 250 for refilling the cleaning solution used for cleaning the filter fabric FC, (287);
A valve 287a for interrupting the return pipe 287;
Further comprising a level sensor (281a) installed inside the washing tank (281) and sensing a level of the inside of the washing tank (281);
The valve 287a is closed when the water level inside the cleaning tank 281 detected by the level sensor 281a is lower than a predetermined high water level and the valve 287a is opened when the water level reaches a predetermined high water level, And the washing liquid in the tank (281) is recovered through the recovery pipe (287).

Images