KR102519149B1 - Filter press with circulation type filter cloth - Google Patents

Abstract

The present invention provides a filter press with a circulation-type filter cloth, which is improved compared to the traditional one, comprising: a frame which forms an overall frame; front and back plates which are installed in the frame to be located away from each other in a forward and backward direction; a middle plate which is installed in the frame to move in the forward and backward direction between the front and back plates; a main cylinder which is installed in the back plate to move the middle plate in the forward and backward direction; a plurality of filter plates which are installed in the frame to move in the forward and backward direction between the front plate and the middle plate, have an upper guide roller and a lower guide roller on an upper end and a lower end thereof, are in a closed plate state by being in contact with each other by the forward of the middle plate, and are in an open plate state by being away from each other by the backward of the middle plate; and a filter cloth which is provided as a closed loop shape, circulates via each of spaces between filter plates in an open plate state when a driving roller installed in the frame is rotated, wherein the filter cloth is placed double in each space by sequentially winding the lower guide roller and the upper guide roller in the filter plate located in a back of each space, and then winding the lower guide roller in the filter plate located in a front of each space.

Description

Filter cloth circulation filter press {FILTER PRESS WITH CIRCULATION TYPE FILTER CLOTH}

The present invention relates to a filter press used for sludge dewatering, and more particularly, to a filter cloth circulation filter press in which closed-loop filter cloth is circulated through open filter plates.

Sewage discarded from homes or factories is treated after being sent to a sewage treatment plant, and sludge generated in this treatment process is treated through reduction processes such as concentration and dehydration. In addition, a dehydrator, which is one of the devices used in the sludge reduction process, separates the filtrate from the sludge, and is classified into belt press, filter press, screw press, centrifugal dehydrator, electric osmosis dehydrator, etc. according to the operating principle.

The filter press separates the filtrate from the sludge by injecting the sludge into an airtight chamber provided between the filter plates in a closed plate state (in close contact with each other), and then removing the sludge from the open chamber between the filter plates in an open state (separated from each other). It is a device that free-falls cake (dehydrated sludge).

Currently, a filter cloth circulation filter press, which is one type of such a filter press, is known. In the filter cloth circulation filter press, the filter cloth is provided in the form of a closed loop passing between filter plates. In addition, the filter cloth does not circulate in the closed plate state in which dehydration is performed, but in the open plate state after completion of dehydration, the filter cloth circulates so that the section of the filter cloth used for dehydration escapes between the filter plates and at the same time the section of the new filter cloth is located between the filter plates. do. When the section of the new filter cloth is located between the filter plates, a closed plate state is formed again and dehydration is performed.

The above filter cloth circulation filter press is disclosed in Patent Publication No. 10-2002-0082047 (filter press) and Patent Registration No. 10-2324708 (unmanned automatic tower type filter press device). In the above published patent publication, the filter plates are arranged in a horizontal direction, and in the above registered patent publication, the filter plates are arranged in a vertical direction.

Publication No. 10-2002-0082047 (filter press) Registered Patent Publication No. 10-2324708 (unmanned automatic tower type filter press device)

An object of the present invention is to provide an improved filter cloth circulation filter press compared to the prior art.

The present invention, the frame forming the overall frame; a front plate and a back plate installed on the frame so as to be spaced apart in the forward and backward directions; a middle plate installed on the frame so as to move forward and backward between the front plate and the back plate; A main cylinder installed on the back plate to move the middle plate forward and backward; It is installed on the frame so that it can move forward and backward between the front plate and the middle plate, and has an upper guide roller and a lower guide roller at the top and bottom, and is in close contact with each other by the forward movement of the middle plate to form a closed plate state, and to reverse the middle plate A plurality of filter plates spaced apart from each other by the plate state; And it is provided in a closed loop form and circulates through each of the spaced spaces between the filter plates in an open state when the drive roller installed on the frame rotates, and the lower guide roller and the upper guide roller of the filter plate located behind each spaced space are sequentially Provides a filter cloth circulation filter press comprising a; filter cloth disposed in two layers in each spaced space in the form of winding around the lower guide roller of the filter plate located in front of each spaced space after winding it around.

An anti-contact guide roller is provided at the upper end of any one of the two filter plates located in front and behind each of the separation spaces, and the diameter of the anti-contact guide roller and the lower guide roller is greater than the thickness in the front-back direction of the filter plate.

Two filter plates positioned in front and behind each of the separation spaces are connected by a connecting link, and the connecting link includes a front part and a rear part each having a front long hole and a rear long hole extending in the forward and backward direction. The front long hole protrusion protruding from the side of the filter plate located in front of each of the spaced spaces is inserted into the front long hole, and the rear long hole protrusion protruding from the side of the filter plate located behind each of the spaced spaces is inserted into the rear long hole. do.

The front and rear portions of the connecting link have different vertical positions, and the connecting link includes a middle portion connecting the front and rear portions. At the middle portion, a sludge supply member provided to pass the sludge press-fitted in the closed plate state in the front and rear directions and at the same time supply it to the room formed by the two layers is fixed.

The front plate and the back plate may be fixedly installed on the frame.

Unlike this, the front plate may be fixedly installed on the frame, and the back plate may be composed of a movable head installed on the frame so as to move forward and backward.

In this case, a rack extending in the front-rear direction is installed in the frame, and a pinion engaged with the rack and a pinion motor for rotating the pinion are installed in the moving head. The moving head moves forward and backward when the motor for the pinion is operated.

A locking means is installed on the back of the moving head. The locking means includes a locking block that moves between a locking position and an unlocking position, and in the locking position, the locking block prevents the moving head from being pushed backward when the main cylinder presses the filter plates in the closed state forward. It is inserted into the lock groove formed in the frame.

The frame includes a washing means for washing the filter cloth out of the filter plates, a meandering correction means positioned between the washing means and the drive roller to correct the meandering of the filter cloth, and a tension of the filter cloth when the middle plate moves forward and backward. A tension maintaining means is installed to keep it constant.

According to the present invention, since the filter cloth is formed in two layers between the filter plates to form a room in which the sludge is press-in and dehydrated, the sludge does not adhere to the filter plate at all when dehydration is performed in the closed plate state, and the filter plates are opened after dehydration In the process, the effect of the free fall of the sludge cake from the filter cloth occurs.

Further, according to the present invention, the filter cloth can be circulated in the open state without contacting the filter plates.

In addition, according to the present invention, the connection between the filter plates can all be connected by the same shape of the connection link, and the effect of preventing interference between the connection links and the effect of firmly fixing the sludge supply member to the connection link Occurs.

In addition, according to the present invention, since the main cylinder is installed in the moving head, the sludge dewatering capacity can be increased without limitation by increasing the number of filter plates as necessary, and the phenomenon that the moving head is pushed backward when the main cylinder is operated is prevented. .

Further, according to the present invention, the filter fabric can be washed during circulation, the meandering of the filter fabric occurring during circulation can be corrected, and the filter fabric can be prevented from loosening or tightening due to the opening and closing of the filter plate.

1 is a perspective view showing a filter cloth circulation filter press according to the present invention.
Fig. 2 is a left side view of the filter cloth circulation filter press shown in Fig. 1;
FIG. 3 is a left side view showing the inside of the cleaning means shown in FIG. 1;
FIG. 4 is an enlarged perspective view of a left part of the meandering correction unit shown in FIG. 1 .
5 is a real photograph of a connection link connecting the filter plates shown in FIG. 1 and a sludge supply member fixed to the connection link, as viewed from the left side.
Figure 6 is a real picture of the sludge supply member shown in Figure 5.
7 is a perspective view illustrating a moving head that is a modified example of the back plate shown in FIG. 1;
FIG. 8 is a perspective view of the back of the moving head shown in FIG. 7;

Hereinafter, preferred embodiments of the filter cloth circulation filter press according to the present invention will be described in detail with reference to the drawings. The terms or words used below should not be construed as being limited to ordinary or dictionary meanings, and based on the principle that the inventor can appropriately define the concept of terms in order to best explain his or her invention. It should be interpreted as meaning and concept consistent with the technical spirit of the present invention.

As shown in FIGS. 1 and 2, the filter cloth circulation filter press 100 according to the present invention includes a frame 110, a front plate 120 and a back plate 130, a middle plate 140, and a main cylinder 132 And, a plurality of filter plates (150a, 150b) and a filter cloth (160).

The frame 110 is a member constituting the entire frame. The front plate 120 is fixedly installed at the front end of the frame 110, and the back plate 130 is fixedly installed at the rear end of the frame 110. Therefore, the front plate 120 and the back plate 130 are spaced apart in the front-back direction. The middle plate 140 is installed on the frame 110 so as to move forward and backward between the front plate 120 and the back plate 130, that is, to move forward and backward.

The main cylinder 132 is fixedly installed on the back plate 130 and has a cylinder rod fixed to the middle plate 140. Therefore, when the main cylinder 132 operates, the middle plate 140 moves forward and backward. A hydraulic cylinder may be used as the main cylinder 132 .

The plurality of filter plates 150a and 150b include first filter plates 150a and second filter plates 150b that are alternately positioned, and are arranged parallel to each other between the front plate 120 and the middle plate 140 . In addition, left and right ends of the filter plates 150a and 150b are slidably coupled to the frame 110 . Accordingly, the filter plates 150a and 150b may move forward and backward between the front plate 120 and the middle plate 140 . In this specification, for a clear understanding, a case in which left and right are set based on a view from the rear to the front will be described as an example.

Upper guide rollers 152a and 152b extending in the left and right directions are rotatably provided at the upper end of each of the filter plates 150a and 150b. At this time, the upper guide roller 152a of the first filter plate 150a and the upper guide roller 152b of the second filter plate 150b have different heights in the vertical direction, which means that the filter plates 150a and 150b are in close contact with each other. This is to avoid interference between the upper guide rollers 152a and 152b adjacent to each other in the state. 1 and 2 show an example in which the upper guide roller 152b of the second filtering plate 150b is higher than the upper guide roller 152a of the first filtering plate 150a.

Bottom guide rollers 154a and 154b extending in the left and right directions are rotatably provided at the lower end of each filter plate 150a and 150b. The lower guide roller 154a of the first filter plate 150a also has a different height from the lower guide roller 154b of the second filter plate 150b in the vertical direction, which is also the lower guide roller 154a, 154b adjacent to each other in the closed plate state. ) to avoid interference between 1 and 2 show an example in which the lower guide roller 154b of the second filtering plate 150b is higher than the lower guide roller 154a of the first filtering plate 150a.

The filter plates 150a and 150b are brought into close contact with each other by the advancement of the middle plate 140 . In addition, the filter plates 150a and 150b are separated from each other by the backward movement of the middle plate 140, and at this time, a space is formed between the adjacent filter plates 150a and 150b. 1 and 2 show an open state.

In the open plate state, the most rearmost filter plate 150b is first pushed forward by the advancing middle plate 140, and then the filter plates 150a and 150b are sequentially pushed forward to a closed plate state. 1 and 2 show an example in which the rearmost filtering plate 150b is the second filtering plate 150b.

In the closed plate state, the rearmost filter plate 150b is first pulled backward by the middle plate 140 moving backward, and thereafter the filter plates 150a and 150b are sequentially pulled backward. To this end, the filter plates adjacent to each other ( The left and right sides of 150a and 150b are connected by a connecting link 180, and the left and right sides of the rearmost filter plate 150b and the left and right sides of the middle plate 140 are also connected by a connecting link 180.

Each connecting link 180 includes a front portion 182 and a rear portion 186, and an intermediate portion 184 connecting the two portions 182 and 186, as shown in FIG. A front long hole extending in the front-back direction is formed in the front part 182, and a rear long hole extending in the front-back direction is also formed in the rear part 186. In addition, a front long hole protrusion 183 and a rear long hole protrusion 187 are formed on the left side of each of the filter plates 150a and 150b, and upper protrusions 183 and 187 are also formed on the right side. In the upper front long hole formed in the front part 182, the front long hole projection 183 of the filter plates 150a and 150b located in front of the separation space is inserted, and in the upper rear long hole formed in the rear part 186, the spaced The protrusions 187 for long holes on the rear side of the filter plates 150a and 150b located behind the space are inserted, and after these insertions are made, the pins 188 are fastened to the protrusions 183 and 187 to form the connection link 180. departure is prevented. For reference, the illustration of the connection link 180 is omitted in FIGS. 1 and 2 .

As shown in FIGS. 1 and 2 , the filter cloth 160 is provided in a closed loop shape and circulates through spaced spaces between filter plates 150a and 150b in an open state. The filter cloth 160 sequentially winds the lower guide rollers 154a and 154b and the upper guide rollers 152a and 152b of the filter plates 150a and 150b located at the back of each separation space, and then in front of each separation space. The lower guide rollers 154a and 154b of the filter plates 150a and 150b are wound around and arranged in each spaced space. Therefore, in each spaced space, the filter cloth 160 is disposed in two layers, and the two layers form a filter cloth in which sludge is pressed and dehydrated in a closed plate state.

Circulation of the filter cloth 160 is performed when the driving roller 322 provided on the multifunctional cart 300 rotates. The multi-function bogie 300 includes a bogie frame 310 fixed to the frame 110, and the upper drive roller 322 is rotatably coupled to the bogie frame 310 in a left and right extending posture. And the drive roller 322 is provided to rotate by the drive motor 324 installed on the bogie frame 310.

In the prior art disclosed in Patent Publication No. 10-2002-0082047 and Patent Registration No. 10-2324708, since a layer of filter cloth is located in the space between the filter plates, when dehydration is performed in the closed plate state, the sludge is removed from the filter plate. There is a problem of being buried in the field and a problem of the existence of a sludge cake (dehydrated sludge) that does not free fall from the filter cloth in the open state.

However, in the filter cloth circulation filter press 100 according to the present invention, the filter cloth 160 is formed in two layers between the filter plates 150a and 150b to form a room in which sludge is pressed and dehydrated. does not adhere to the filter plate at all, and in the process of opening the filter plates 150a and 150b after dehydration, the sludge cake in the room is free-falling from the filter cloth 160.

On the other hand, in the filter cloth circulation filter press 100, as described above, the filter cloth 160 is circulated in an open state. At this time, when the filter cloth 160 contacts the filter plates 150a and 150b, it can be easily worn. You need to prevent this.

Therefore, in the filter cloth circulation filter press 100, the upper end of any one filter plate 150a among the two filter plates 150a and 150b located before and after each separation space, for example, the first filter plate as shown in FIGS. 1 and 2 An anti-contact guide roller 156a is additionally provided at the top of 150a. At this time, the guide roller 156a for preventing contact is located below the upper guide roller 152a of the first filter plate 150a and has a larger diameter than the thickness of the filter plates 150a and 150b in the front-back direction. In addition, along with this, the diameter of all the lower guide rollers 154a and 154b is also provided larger than the thickness of the filter plates 150a and 150b in the front and rear directions. Due to the anti-contact guide roller 156a and the lower guide rollers 154a and 154b as above, the two layers of filter cloth 160 located in each spaced space are separated from the filter plates 150a and 150b in a slightly spaced state. You can climb up and down in the field.

Previously, it has been described that the connecting link 180 has a front part 182, a rear part 186 and a middle part 184, but the middle part 184 has a sludge supply member 170 as shown in FIG. ) is detachably coupled in an erected state. This sludge supply member 170 is tightly sandwiched between the filter plates 150a and 150b in the closed plate state, and at this time, the inner end of the sludge supply member 170 (the right side if the sludge supply member 170 is located on the left side) It means the end, and if it is located on the right side, it means the left end] is tightly sandwiched between the two layers of the filter cloth 160 forming the yeosil.

As shown in FIG. 6, the sludge supply member 170 has one front and rear through hole 172 and a plurality of left and right through holes 174. 6 shows a sludge supply member 170 having three left and right through holes 174. At the left and right ends of each of the filter plates 150a and 150b, as shown in FIG. 1, sludge injection holes 158 are opened in the front and rear directions, and the upper front and rear through holes 172 are located in front and behind of their 172 in the closed plate state The sludge injection hole 158 is communicated. In addition, the left and right through holes 174 in the stomach communicate with the front and rear through holes 172 in the closed plate state. Therefore, when the sludge is pushed into the sludge injection pipe 122 (see FIG. 1) formed at the left and right ends of the front plate 120 in the closed plate state, the sludge moves backward along the sludge injection holes 158 and the front and rear through holes 172 At the same time, in each sludge supply member 170, it moves to each room through the left and right through holes 174. And while this state is maintained for a predetermined time, sludge is dehydrated.

During dehydration, the filtrate contained in the sludge in the filtering chamber passes through the two layers of filter cloth 160 forming the filtering chamber and flows down between the surface protrusions (not shown) provided on the front and rear surfaces of the filter plates 150a and 150b. , separated from the filtrate and dehydrated sludge, that is, sludge cake, remains in the filtering chamber. And the filtrate flowing down flows to the outside along the filtrate drainage holes (not shown) provided at the lower left and right ends of each filter plate (150a, 150b) and communicating with each other in the closed plate state to the drain pipe 124 formed at the left and right ends of the front plate 120. It is discharged.

As described above, in the present invention, the connection link 180 performs not only the function of connecting the filter plates 150a and 150b, but also the function of fixing the sludge supply member 170. In this case, the connection link 180 is shown in FIG. As described above, it is preferable that the vertical positions of the front part 182 and the rear part 186 are different. 5 shows an example in which the front part 182 is higher than the rear part 186 . As described above, if the vertical positions of the front part 182 and the rear part 186 are different, first, all the connecting links 180 may have the same shape, so that the manufacturing and fastening of the connecting links 180 are easy, and each other Interference between adjacent connecting links 180 can be avoided, and secondly, since the contact area between the intermediate portion 184 and the sludge supply member 170 is sufficiently secured in the vertical direction, the sludge supply member 170 in the connection link 170 ), it is easy to arrange a sufficient number of bolts in the vertical direction to firmly fix.

Previously, it has been described that the drive roller 322 is installed on the multi-function truck 300, and other meandering correction means and tension maintaining means are also installed on the multi-function truck 300. In addition, a washing means 200 is also provided in the filter cloth circulation filter press 100.

The washing means 200 is for washing the circulating filter cloth 160, and as shown in FIGS. 1 and 2, it is fixed to the frame 110 so as to be located on top of the front plate 120, and cleans the internal space. It includes a housing 210 having. And, the washing water supply pipe 220 is coupled to the housing 210 . 1 and 2 show an example in which two washing water supply pipes 220 are provided.

Inside the housing 210, as shown in FIG. 3, a plurality of guide rollers 230 around which the filter cloth 160 outside the filter plates 150a and 150b are wound are rotatably provided in a left and right extending posture. . In addition, a washing water injection pipe 222 is provided inside the housing 210 to spray the washing water supplied from the washing water supply pipe 220 to the circulating filter cloth 160. The washing water sprayed from the washing water injection pipe 222 rises from the bottom of the housing 210 while removing the sludge remaining in the filter cloth 160 from the filter cloth 160, and then enters the drain hole 212 formed on the front surface of the housing 210 ( 1) is discharged to the outside of the housing 210 through the upper drain 212.

On the other hand, the washing means 200 may be provided in various well-known forms unlike the above. For example, the cleaning means 200 may be configured like the ultrasonic cleaning device disclosed in Patent Registration No. 10-2313179.

The meandering correcting means is installed on the truck frame 310 to be located between the washing means 200 and the driving roller 322, and includes a pair of correcting rollers 344 arranged in the front-rear direction and extending in the left-right direction. The filter cloth 160 circulates through the bottom of the front straightening roller 344, between both straightening rollers 344, and the top of the rear straightening roller 344.

The left and right ends of the straightening roller 344 are rotatably coupled to the rotary table 342 as shown in FIG. 4 . Also, the rotation table 342 is supported by bearings 343, and thus can rotate around a vertical axis extending in the vertical direction. The bearing 343 is coupled to the upper surface of the forward and backward reciprocating block 345. The forward and backward reciprocating block 345 is coupled to the bracket 347 fixed to the bogie frame 310 so as to be able to move forward and backward, and moves forward and backward by the pneumatic cylinder 348 fixed to the bracket 347. In front of the correction roller 344, a pair of meander detection sensors 346 are installed to be positioned on the left and right sides of the filter cloth 160.

As in the present invention, when the filter cloth 160 circulates along a relatively long path, the filter cloth 160 may meander. It comes into contact with the left meandering detection sensor 346 shown in . And, as in this example, when the filter cloth 160 contacts the left meander detection sensor 346, the right pneumatic cylinder 348 operates to advance the right end of the correcting rollers 344 so that the filter cloth 160 meanders. , or by operating the left pneumatic cylinder 348 to reverse the left ends of the straightening rollers 344, the meandering of the filter cloth 160 is corrected.

The tension maintaining means is installed on the bogie frame 310 so as to be located between the drive roller 322 and the middle plate 140, and as shown in FIG. 2, a plurality of fixed rollers 336 and a plurality of tension rollers 334 include The filter cloth 160 wound around the drive roller 322 circulates around the fixed roller 336 and the tension roller 334 alternately. 2, three fixing rollers 336 and two tension rollers 334 are illustrated.

The fixed rollers 336 extend in left and right directions, are arranged in an up and down direction, and are rotatably coupled to the bogie frame 310 . The tension rollers 334 are rotatably coupled to a pair of back and forth reciprocating supports 332 that extend in the left and right directions, are arranged in the up and down directions, and are spaced apart in the left and right directions. A pair of forward and backward reciprocating supports 332 are coupled to the truck frame 310 to move forward and backward, and move forward and backward by one tension cylinder 338 installed on the truck frame 310. The tension cylinder 338 is controlled to move the back and forth reciprocating support 332 backward when the middle plate 140 advances and is controlled to move the back and forth reciprocation support 332 forward when the middle plate 140 moves backward, so that the middle plate 140 Even if it moves, the tension of the filter cloth 160 is kept constant.

On the other hand, it has been previously described that the back plate 130 on which the main cylinder 132 is installed is fixed to the frame 110, but unlike this, the back plate 130 may be installed on the frame 110 so as to move forward and backward, Below, this back plate 130 is referred to as a moving head 1130 and will be described with reference to FIGS. 7 and 8 .

A main cylinder 132 is fixed to the moving head 1130, and a cylinder rod of the main cylinder 132 is fixed to the intermediate plate 140. A pair of pinions 1132 spaced apart in the left and right directions are rotatably coupled to the moving head 1130, and a pinion motor 1134 for rotating the pinions 1132 is installed. 7 and 8 illustrate a pair of pinion motors 1134 for rotating the pair of pinions 1132, respectively, but only one pinion motor 1134 may be provided, in which case a pair of pinions 1132 are connected to each other and rotated simultaneously by one pinion motor 1134.

A pair of racks 1131 spaced apart in the left and right directions are fixed to the frame 110, and a pinion 1132 is engaged with the racks 1131. Therefore, when the pinion 1132 rotates, the moving head 1130 moves forward and backward, and when the moving head 1130 moves forward and backward, the middle plate 140 connected to the moving head 1130 is also moved by the main cylinder 132. Go forward and backward with (1130).

When the main cylinder 132 is installed on the back plate 130 fixed to the frame 110, the more the number of filter plates 150a and 150b increases, the longer the stroke of the main cylinder 132, so the filter plate 150a , There is a limit to increasing the sludge dewatering capacity by increasing the number of 150b). However, when the main cylinder 132 is installed on the moving head 1130, the front-back position of the main cylinder 132 can be changed by the moving head 1130, so the number of filter plates 150a and 150b is increased. However, the stroke of the main cylinder 132 does not need to be lengthened at all, and thus the sludge dewatering capacity can be increased without limitation by increasing the number of filter plates 150a and 150b as necessary.

When the moving head 1130 is provided as described above, the filter plates 150a and 150b are closed while the moving head 1130 advances to a preset forward position while the hydraulic pressure of the main cylinder 132 is kept constant. Then, the hydraulic pressure of the main cylinder 132 increases so that the main cylinder 132 strongly presses the middle plate 140 so that the closing state of the filter plates 150a and 150b is reliably maintained. At this time, the moving head 1130 Due to the reaction of the force applied to the middle plate 140 by the main cylinder 132, it is strongly pressed backward. Therefore, in the present invention, by installing a pair of locking means symmetrically left and right on the moving head 1130. The moving head 1130 is prevented from being pushed backward when the main cylinder 132 operates.

Each locking means may include a locking cylinder 1135, a locking block 1146, and a guider 1137, as shown in FIG. The locking cylinder 1135 is installed on a bracket fixed to the back of the moving head 1130. The locking block 1146 is fixed to the cylinder rod of the locking cylinder 1135 and reciprocates between a locking position and an unlocking position when the locking cylinder 1135 operates. The guider 1137 is fixed to the back of the moving head 1130 and guides the reciprocation of the locking block 1146.

When the moving head 1130 is placed in the forward position, a locking groove (not shown) is formed in advance at a portion of the frame 110 facing the locking block 1146. The locking block 1146 moved to the locked position is inserted, so that the moving head 1130 is not pushed backward even when the main cylinder 132 operates.

Hereinafter, the operation process of the above-described filter cloth circulation filter press 100 will be described.

When the filter plates 150a and 150b in the open plate are moved forward by the operation of the main cylinder 132 and become closed, the sludge is pressed into the sludge injection pipe 122, and at this time, the sludge is formed by the filter cloth 160 supplied with The press-injection of the sludge continues for a predetermined dewatering time, and in this process, the filtrate is drained through the drain pipe 124, and the sludge cake remains in the chambers. When the moving head 1130 is provided, the filtering plates 150a and 150b are closed when the moving head 1130 advances.

When the dehydration time is over, the main cylinder 132 operates in reverse so that the filter plates 150a and 150b in the closed plate state open, and in this process, the sludge cake in the chambers freely falls. After the opening state is formed, the driving roller 322 rotates so that the filter cloth 160 circulates only as much as the preset distance, and in this process, the section of the filter cloth 160 used for dehydration passes through the washing means 200. A section of the filter cloth 160 that has been washed and not used for dewatering is positioned between the filter plates 150a and 150b. When the moving head 1130 is provided, the filter plates 150a and 150b are opened when the moving head 1130 moves backward.

After this process is completed, a closed plate state is formed again and dehydration takes place.

As described above, although the present invention has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those skilled in the art to which the present invention belongs It goes without saying that various modifications and variations can be made within the equivalent scope of the claims to be described, and the above-described embodiments can be combined in various ways.

100: filter cloth circulation filter press 110: frame
120: front plate 130: back plate
132: main cylinder 140: middle plate
150a, 150b: filter plate 152a, 152b: upper guide roller
154a, 154b: bottom guide roller 156a: contact prevention guide roller
160: filter cloth 170: sludge supply member
172: front and rear through holes 174: left and right through holes
180: connection link 182: front part
183: front protrusion for long hall 184: middle part
186: rear part 187: rear long hole protrusion
200: washing means 300: multi-function cart
322: drive roller 334: tension roller
336: fixed roller 338: tension cylinder
344: calibration roller 348: pneumatic cylinder
1130: moving head 1131: rack
1132: pinion 1133: support roller
1134: motor for pinion 1135: lock cylinder
1136: lock block 1137: guider

Claims (9)

frame that forms the overall framework;
a front plate and a back plate installed on the frame so as to be spaced apart in the forward and backward directions;
a middle plate installed on the frame so as to move forward and backward between the front plate and the back plate;
A main cylinder installed on the back plate to move the middle plate forward and backward;
It is installed on the frame so that it can move forward and backward between the front plate and the middle plate, and has an upper guide roller and a lower guide roller at the top and bottom, and is in close contact with each other by the forward movement of the middle plate to form a closed plate state, and to reverse the middle plate A plurality of filter plates spaced apart from each other by the open plate state; and
It is provided in the form of a closed loop and circulates through each of the spaced spaces between the filter plates in an open state when the drive roller installed on the frame rotates, and sequentially passes the lower guide roller and the upper guide roller of the filter plate located behind each spaced space. A filter cloth arranged in two layers in each spaced space in the form of winding around the lower guide roller of the filter plate located in front of each spaced space after winding it around,
The two filter plates positioned in front and behind each of the separation spaces are connected by a connecting link, and the connecting link connects the front and rear parts, each having a front long hole and a rear long hole extending in the front and rear direction, and the front and rear parts. Including the middle part of
The front long hole protrusion protruding from the side of the filter plate located in front of each of the spaced spaces is inserted into the front long hole, and the rear long hole protrusion protruding from the side of the filter plate located behind each of the spaced spaces is inserted into the rear long hole. The front and rear parts of the connection link have different positions in the vertical direction, and in the middle part, the sludge that is press-fitted in the closed plate state is passed through in the front and rear directions and at the same time supplied to the room formed by the two layers. Supply of sludge A filter cloth circulation filter press with a fixed member. According to claim 1,
An anti-contact guide roller is provided at an upper end of any one of the two filter plates positioned in front and rear of each separation space, and the diameter of the anti-contact guide roller and the lower guide roller is greater than the thickness of the filter plate in the front-back direction. filter press. delete delete According to claim 1,
The front plate and the back plate are fixedly installed on the frame of the filter cloth circulation filter press. According to claim 1,
The front plate is fixedly installed on the frame, and the back plate is constituted by a movable head installed on the frame so as to move forward and backward. According to claim 6,
A rack extending in the forward and backward direction is installed in the frame, a pinion engaged with the rack and a pinion motor for rotating the pinion are installed in the moving head, and the moving head moves forward and backward when the pinion motor is operated. filter cloth circulation filter press. According to claim 7,
A locking means is installed on the rear side of the moving head, and the locking means includes a locking block that moves between a locked position and an unlocked position. The filter cloth circulation filter press in which the locking block is inserted into the locking groove formed in the frame to prevent the head from being pushed backward. According to claim 1 or 2 or 5 or 6 or 7 or 8,
The frame includes a washing means for washing the filter cloth out of the filter plates, a meandering correction means positioned between the washing means and the drive roller to correct the meandering of the filter cloth, and a tension of the filter cloth when the middle plate moves forward and backward. A filter cloth circulation filter press in which a tension maintaining means is installed to maintain a constant level.

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