JPS59101299A - Continuous automatic pressure dehydrator - Google Patents

Abstract

PURPOSE:To dehydrate continuously and automatically various kinds of sludge under pressure by treating continuously the sludge in various stages for filtering under pressure, dehydrating cake, removing cake and washing filter clotch thereby decreasing the moisture content of the sludge with good efficiency and preventing the clogging in the filter cloth. CONSTITUTION:Sludge-contg. cement or sludges contg. org materials such as mud, excrement, or the like is supplied by a pressure pump 13 into a pressure filtering dehydrator 17, where the sludge is pressed and dehydrated by an endless filter cloth 3 passing in the dehydrator and is filtered as cake C on the filter cloth 3. The filtrate is discharged through a draining port 25. The filter cloth deposited thereon with the cake C is pressed by a press roll 77 and a receiving roll 75, via a guide roll 73, then the cake C transfers onto the roll 77. The transferred cake C' is scraped by a scraper 85 onto a conveyor 87. The filter cloth 3 enters the inside of a washing water tank 95, where it passes a cage type roll 101 and is cleaned by a nozzle 103 for ejecting water ultrasonically and a squeezing roll 107 to a clean filter cloth having no remaining cake. Said filter cloth is again circulated to the dehydrator 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous automatic dewatering device for sludge generated in wastewater and sewage treatment, particularly for pressure filtration, cake dewatering,
By automatically and continuously performing each process of cake removal and filter cloth cleaning, it is possible to efficiently reduce the moisture content of various sludges, maintain the filter cloth with almost no clogging, and can also be manufactured for transportation. Concerning continuous automatic pressurized dehydration equipment.

Currently, wastewater and sewage treatment is extremely urgent in terms of pollution prevention, but equipment costs are generally high, and small and medium-sized enterprises in particular cannot bear the burden.

For example, wastewater from washing agitator trucks used for transporting fresh concrete at a factory, and wastewater from washing formwork at a factory for producing humid pipes, concrete piles, concrete members for prefabricated buildings, slate, etc., are generated daily compared to general factory wastewater. Although the amount is small compared to that of 2009, it contains fine sand and cement, which makes it highly alkaline, and it is impossible to directly discharge it into the public sewer system, so a settling tank is installed, which is extremely expensive. However, in the event of heavy rain, there is not only a risk of serious pollution such as flooding of surrounding areas or infiltration of groundwater, but also
It is common for early morning sedimentation ponds to become full and require further expansion. Therefore, a filter press or the like is installed to process the water every day, and the generated solids are used to the extent possible as materials for reef blocks and other secondary products that do not require strength, and the filtered water is reused as working water. is the most preferable, but since filter presses are usually used for batch processing, the sludge remains in the frelter for a long time.
During this time, the cement solidifies within the filter cloth and is difficult to remove even with subsequent cleaning, thus shortening the life of the filter cloth and not only requiring extremely high initial equipment costs, but also increasing maintenance costs during use. However, there is also a very large drawback. For this reason, it is common practice to have wastewater treatment companies take over the wastewater, and in some cases, as a result of outsourcing to inferior wastewater treatment companies, wastewater is illegally dumped into public sewers, etc., which is extremely serious in terms of pollution prevention. There are many cases where unexpected accidents occur. This kind of case is almost the same in the case of mud-containing washing wastewater in the quarrying industry, and wastewater in the treatment of manure in the pig farming or poultry farming industry.

The purpose of this application is to eliminate the drawbacks of conventional filter presses, etc., and to have sufficient filtration function to dewater sludge from cement products factories including ready-mixed concrete factories, quarrying industries, pig farming, poultry farming, etc. In addition, we aim to provide an inexpensive continuous automatic pressurized dewatering device that is less likely to clog the filter cloth, has a relatively simple structure, and is highly maneuverable. By reducing the burden of equipment funding and maintenance costs,
The purpose is to make it possible to easily dewater sewage, wastewater, etc. necessary for pollution prevention at the place where it is generated, and to promote its widespread use.

The continuous automatic pressurized dewatering device of the present invention is installed between horizontal and mutually parallel drive rules and support rolls located at both ends of the device, and is pulled and driven from the support roll toward the drive roll. , a belt-shaped endless filter cloth that circulates with the upper side as an outgoing process and the lower side as a returning process; and a pressurized filtration and dehydration device that is positioned to sandwich the filter cloths above and below in the outgoing process following the support roll. , the driving roll is frictionally driven by pressing the filter cloth through the filter cloth, and after pressing and dewatering the cake on the filter cloth, a pressing roll for transferring the cake; One or more receiving rolls for dewatering, a cake peeling means comprising a scraper or the like for peeling off the cake so that the distance between the surface of the pressing roll and the cutting edge is equal to or less than the thickness of the cake to be transferred, and a return path. It mainly consists of a cleaning device for the filter cloth installed in the process, and the pressurized filtration and dehydration device cleans one hollow shell from above and below in one plane! C consists of an upper layer and an upper shell corresponding to two parts, and this upper shell supports the filter cloth and faces the upper shell, which is located in contact with the lower surface of the filter cloth, in contact with the upper surface IC of the filter cloth. and the required distance 1■ between the upper shell and the upper shell.
It has a lowering means such as a pneumatic cylinder for being pressed toward the upper layer, and furthermore, a partition part for suppressing adjustment is provided on the side surface of the outlet side through which the filter cloth passes. It is characterized by having the following.

The present invention will be explained below with reference to Examples and drawings.

All of the main parts of this device can be assembled into a single rack.

The endless filter cloth 3 is preferably made of felt made from natural fibers or synthetic fibers, and its width is not particularly specified, but it is usually about 2 m or less.

The thickness of the filter cloth 3 is most preferably selected depending on the properties of the sludge, but the thickness can usually be selected from a range of about 41 qm to about 12 sq. For example, raw concrete!・For sludge from factories, etc., a thickness of about 6 mm is sufficient.

The support roll 5 located at the starting end of the forward stroke is a floating roll, and it is preferable that the bearings 7 at both ends of the support roll 5 are moved by a tensioning device 9 made of, for example, a screw mechanism to tension the filter cloth 3 and act as a tension roll.

The sludge S to be dewatered using this device is usually temporarily stored in a relatively small capacity mud storage tank (not shown) 1, and then passes through a transport pipe 11 to a pressure pump 13 where it is brought to the required pressure. The sludge is pressurized and then passed through the pipe 15 into the upper shell 19 of the pressurized filtration and dewatering device 17 through the sludge population 21 .

Although a known pressure pump 13 can be used, it is preferable to use one that can be used in conjunction with the valve 14 and the like to adjust the pressure and flow rate χ according to the type of sludge S, solid content, etc. Since the filter cloth 3 moves continuously, the thickness of the produced cake C can be kept relatively thin, and therefore the filtration resistance can be kept low, so that the pressure can be adjusted within a range of, for example, 0.2 K9/lyl to 1. OKflll
cr&, and the flow rate adjustment range is O,”;', m@/
If it is about min to 0.5 m7m1n, it is sufficient for applications such as a normal scale ready-mixed concrete factory.

The upper shell 19 and the upper shell 23 of the pressure source kaI 7 are approximately equivalent to one hollow shell, for example, a hollow shell consisting of a rectangular hexahedron on a horizontal plane, that is, a box-shaped body divided into upper and lower parts by a horizontal plane. Then, the filter cloth 3 is sandwiched in between to form a sealed body.

The upper shell 23 is fixed approximately horizontally 1/fi to the pedestal l, and can send filtered water to a raw water tank (not shown) through a drain port 25 and piping 27 on the bottom.

The upper surface of the upper shell 23 is located perpendicularly to the traveling direction of the filter cloth 3 and at an angle of about 20 degrees to about 60 degrees from the vertical plane in the opposite direction.
It has a plurality of support bars 29 that are inclined within a range of 100 to 100 degrees, and supports the pressure applied to the filter cloth 3, and also functions as a drainer to facilitate the discharge of filtered water from the filter cloth 3.

The upper shell 19 is located on a vertical plane that passes approximately through the center of its upper surface portion 31 and is perpendicular to the traveling direction of the filter cloth 3.
The frame 1'/C is supported by usually two suppression adjusters 33 provided on or near both sides of the frame 1'/C, and the spacing between the upper shells 23 and the upper shells 23 is set to a required size. The suppression adjustment shell 33 includes, for example, a support fitting 35 provided on the pedestal IK, a screw rod 37, an adjustment fixing nut 39, a bearing 41, and a fixing fitting 4.
The upper shell 19 is suspended from the frame l on both sides of its width and approximately in the center, and the distance between the upper shell 23 and the upper shell 23 is set to a required value below the position of the pressure adjusters 33 on both sides. can. Therefore, the amount of reduction of the upper shell 19 relative to the upper shell 23 can be limited, and the shaft bearing 41 can prevent front-to-back imbalance in the traveling direction of the filter cloth 3.

Further, the upper shell 19 passes approximately through the center of the upper surface portion 31 and the filter cloth 3
The lowering means 45 is placed between the frame 1 and the frame 1 on a vertical plane extending in the traveling direction ICJp and at a position approximately symmetrical with respect to the center t2. The lowering means 45 can be, for example, a known pneumatic cylinder or hydraulic cylinder. In one row, two pneumatic cylinders 45 installed perpendicularly to the pedestal 1 are connected to the upper surface part 3 via a bearing 49 provided at the lower end of the shaft 47.
By connecting the front and rear ends of 1 to each other, the upper shell 1
9 towards the upper shell 23 and press the filter cloth 3 within the interval set by the compression and adjustment tool 33. The pressing force by the pneumatic cylinder 45 is air compression @ (not shown)
By adjusting the air pressure of each pneumatic cylinder 45 individually or simultaneously, the pressing force between the front and rear of the upper shell 19 is maintained in balance with the bearing 41 of the pressure adjustment tool 33 as a fulcrum, and the bearing 49 maintains balance in the left-right direction and allows the pressing force of the entire upper shell 19 to be set to a desired value. Furthermore, since the spacing between the upper IJ 19 and the upper shell 23 is set to a required value by the suppression adjuster 33, the filter cloth 3
It is possible to prevent pressing more than necessary.

On the side surface 5I of the upper shell 19 on the exit side of the filter cloth 3, there is a sealing sheet 53 made of a synthetic resin or a living body such as a comb, a pressure adjustment plate 55, an adjustment stud 57, an adjustment nut 59, etc. The suppression adjustment plate 55 is provided in the partition part 61' for the adjustment stud 57 and the adjustment nut 591C.
Therefore, when descending, the lower end of the sealing sheet 53 is strongly pressed down onto the upper surface of the filter cloth 3 to substantially seal the gap 63 at the lower end of the side surface 51 of the upper shell 19, thereby reducing the pressure inside the upper shell 19. This prevents the drop in pressure and increases the inflow pressure of the sludge S into the upper shell 19.In addition, the cake C formed on the filter cloth 3 is strongly pressed when it passes through, allowing for extremely effective dewatering. The squeezing rate can be easily lowered with difficult Cake C. If the suppression adjustment plate 55 is raised to weaken the pressing force, the opposite will occur, so adjust it according to the magnitude of filtration resistance of sludge and the difficulty of dewatering Cake C. Also, the suppression adjustment plate 55
After adjustment, fix with the fixing screw 65.

Filter cloth 3 on the lower side of the upper shell 19 excluding the partition 61
It is advantageous to add a scrap frame 67.6@ made of synthetic resin or the like that has low frictional resistance with the filter cloth 3 to the portion in contact with the upper surface of the upper shell 23 and the portion of the upper surface of the upper shell 23 in contact with the filter cloth 3. .

What about the drive roll 71? The filter cloth 3 is pulled and circulated from the support roll 5 through a guide roll 73 and one or more receiving rolls 75 for dewatering, which are usually provided one or more times, and a suppression roll 77 is driven through the filter cloth 3. The drive roll 71 is driven by a town-speed peeper 79, and the speed of the filter cloth 3 is approximately t3m/gs to 60m/am.
It is preferable that the speed can be continuously variable to a certain degree.

The press roll 77 is supported by bearings 83 provided on two support arms 81 with a bearing 8° provided on the frame 1 as a fulcrum, and a cake C is transferred onto the surface of the press roll 77.
A cake peeling means 85 is provided for peeling off the cake; for example, a scraper or the like can be used. The distance between the cutting edge of the scraper 85 and the surface of the suppression roll 77 should be less than or equal to the thickness of the cake g to be transferred, for example less than 5 mm, preferably (7 or 3 z + m ~
Q, 5 mm. Therefore, the distance is l, Q Ter
m, and if the thickness of the transfer cake C is 2.5 mm, then 1
．． Peel 5 wings t4t'i L/, l mm suppress roll 7
7 Leave cake C on the surface.

Also, below the scraper 85 is a conveyor 87 for discharging the peeled cake C.

The suppression roll 77 compresses and dehydrates the cake C on it together with the filter cloth 3 between the receiving roll 75 and the driving roll 71, and then dehydrates the cake C from the filter cloth 3 after deicing. In order to peel off the C and transfer it to the surface of the pressing roll 77, a required pressing force and a diameter larger than that of the driving roll 71 and the receiving roll 75 are required. Alternatively, it is preferable to coat it with rubber to increase the dehydration power. The pressing force is determined by the weight of the pressing roll 77, and if necessary, the pressing force can be increased by injecting water into the pressing roll 71, which is usually hollow and cylindrical, or by placing a weight on the two support arms 81J and fixing it. By doing so, the pressing force can be increased.

The diameter of the pressing roll 77 is preferably about 2 to 3.5 times that of the driving roll 71.

It is preferable that the press roll 77 can be raised when replacing the filter cloth 3. For example, a wire or the like is connected to the tip 89 of the support arm 81, and the pressure roll 77 is hoisted up and suppressed by a hoist 93 via a pulley 91. It is also possible to raise the roll 77. Further, it is preferable that the receiving roll 75 can be adjusted up and down in order to optimally set the position relative to the pressing roll 77 for dewatering.

The main part of the returning process of the filter cloth 3 from the drive roll 71 to the support roll 5 is its cleaning, and the cleaning device is a cleaning water tank 95-
Two box-shaped rolls 101.2 each having a polygonal box shape, with a large gap 99 in the middle of the ribbed beams 97.
A set of fountain nozzles 103, water W from a raw water tank (not shown)
A high-pressure pump 105 and a set of squeezing rolls 10 pressurize the
It mainly consists of 7th grade. It is preferable to use ultrasonic waves for cleaning.The water fountain nozzle 103 is preferably a so-called water bottle-type ultrasonic water fountain nozzle 103 that draws air into the water fountain nozzle and generates ultrasonic vibrations in the water, or alternatively, uses ultrasonic waves. The generator may be installed in any way that generates and heats ultrasonic waves in the cleaning water tank 95, but usually Q) A combination water cylinder type ultrasonic fountain nozzle +03 is sufficient.

The operation and handling of this device will be outlined below.

The sludge S from the sludge storage tank (not shown) is transferred to a pressurizing pump 13.
, the sludge is forced into the upper shell 19 through the sludge 21 through the pipes 15 and the like at the required inflow velocity and pressure. At that time, taking into account the type and properties of sludge S,
Corresponding to the inflow speed and injection pressure of sludge S according to c,
Adjustment of the distance between the upper shell 19 and the upper shell 23 by the pressure adjustment tool 33, adjustment of the pressing force by the lowering means 45 consisting of a pneumatic cylinder, adjustment of the pressure of the partition part 61, adjustment of the speed of the filter cloth 3, etc. As a result, the pressure inside the upper shell 19 is maintained at 8 degrees that satisfies the filtration resistance, and the partition portion 61
From the chisel, the cake C formed on the north side of the cloth 3 can be dehydrated and discharged. It also passes through the filter cloth 3: 4. : The F1 superfluous water is sufficiently scraped off by the support branch 21, and is collected from the drain port 25 of the upper shell 23 into a raw water tank (not shown) and reused. The above adjustments must be made in conjunction with each other. Assuming that the number of rows of sludge S to be treated is constant, when an increase in throughput is desired, the inflow speed is usually increased and the speed of the filter cloth 3 is also correspondingly increased. Since an increase in filtration resistance can thereby be prevented, there is almost no need for an increase in the inflow pressure and an increase in the pressing force by the lowering means accompanying the increase in inflow pressure. Further, by increasing the pressing force of the pipe J part 61, it is possible to effectively reduce the water content of the pipe C to be discharged. On the other hand, increasing the speed of the filter cloth 3 is effective in reducing the filtration resistance and increasing the throughput as described above, but it also increases the water content of the produced cake C and the required power, so it is usually based on the required cake water content. It is preferable to adjust it as follows. It is preferable to find the conditions for minimizing the moisture content of the cake C that is generally generated by experiment for the target sludge S. Approximately 55φ in case of
The filter cloth 3, which retains the cake C on its surface, which can be smeared without reaching about 65% or less even when it contains organic matter such as mud or excrement, is further advanced to the guide roll 73. The direction is changed and the cake C is pressed between the first pressing port and the Luer 7 and the receiving roll 75 and between the first driving roll 71, and the cake C above it is further dehydrated. During this time, the adhesive force of the shell C on the filter cloth 3 to the pressure roll 77 is greater than that to the filter cloth 3, so the pressure roll 77
Almost all of the cake C, for example about 95 or more in the case of cement-related cake C, is deposited on the top, scraped off once to the floor 1 nopa 85, and carried out of the apparatus by a conveyor 87 located 10 degrees below.

If the distance between the blade edge of the scraper 85 and the surface of the suppression roll 77 is eliminated, and if they are in close contact, almost all of the adhesion cake C will be peeled off, but a part of the thickness of the adhesion cake C will be peeled off. When a part of the cake C is left on the pressure roll 77, the partially dehydrated cake C rotates once and is transferred between the guide roll 73 and the receiving roll 75 to form the cake C with a high water content on the filter cloth. When combined with Cake C, Cake C acts as a water absorption layer, and part of the moisture contained in Cake C transfers to Cake C, and an average of 1 C of the contained moisture is removed, resulting in a decrease in the overall moisture content. It acts extremely effectively to suppress the moisture content of Cake C and reduce the moisture content of Cake C, which is clarified by dehydration.

On the other hand, if the thickness of cake C is increased, it is related to the type of sludge S, but from the experimental results, it is generally about 5111
If it is more than m, it will easily peel off from the surface of the suppression roll 77, so the thickness of the coating C left on the surface of the suppression roll 77 is set to a practical thickness of 25 mm or less, preferably 3 mm or less. Moreover, although it is difficult to confirm a clear dehydration effect below 0.541 m, the effect of at least facilitating the transfer of Cake C on the filter cloth onto Cake C is clearly observed. Normally, the effect of reducing the dehydration rate by providing Cake C can be expected to be about 1% to about 5 times.

The moisture content of the cake C discharged onto the conveyor 87 through the above forwarding process is the sludge S consisting of fine sand and cement.
In the case of sludge S containing organic matter, it is about 55% or less.

After passing through the drive roll 71, it is purified on the return journey.

First, the surface of the filter cloth 3 is washed as it passes through the box-shaped roll 101 of the tooth 1, and cake residue is removed from the gap 99 into the water, and then) a 1.1 ultrasonic fountain nozzle is applied from the back side of the filter cloth 3. The filter cloth 3 is washed by high-pressure water accompanied by ultrasonic waves from 103, and the residue remaining inside the filter cloth 3 is also removed, and the generated ultrasonic waves reach the water in the cleaning water tank 95 and have a further effect on cleaning the filter cloth 3. Filter cloth 3 with box-shaped roll 101 of tooth 2
The filter cloth 3 is cleaned from the back side, then the front surface of the filter cloth 3 is cleaned by the ultrasonic fountain nozzle 103 of ]・2, and finally the filter cloth 3 is cleaned from the front surface of the filter cloth 3 by a set of
The cloth 3 dehydrated in the first call 107 is sent to the return trip.
Once the cleaning process is completed, it is restored to a clean state, and then passes through the support roll 5 again to reach the outbound machining process, where it is circulated. Also, washing water tank 9
The wastewater in 5 is successively returned to the mud storage tank.

As described above, the continuous automatic pressure dewatering device of the present invention circulates through a belt-shaped endless filter cloth, and performs pressure filtration of sludge and further pressure dewatering of cake using a knife-edge pressure filtration and dehydration device provided in the forward process. The cake is made to reach a moisture content of about 5% or less, which is practically sufficient, and the cake is further compressed and dehydrated using a pressure roll.Then, the cake is separated from the filter cloth, transferred, and peeled off with a noper. The cake recovery rate is extremely good, reaching over 95% of the produced cake, and when a portion of the cake is left on the suppression roll, the moisture content of the cake can be reduced to a cement level. In the case of a cake containing organic matter, it is possible to reach a temperature of about 35 degrees or less, and even in the case of a cake containing organic matter, it is possible to reach a temperature of about 55 degrees or less.

In addition, the small amount of violet cake residue remaining on the filter cloth is thoroughly washed from the front and back sides of the filter cloth by a box-shaped roll and an ultrasonic fountain nozzle during the return trip, so it usually hardens within the filter cloth and becomes difficult to remove. Even in the case of cement-related sludge treatment, it is washed without giving time for solidification, so it is removed sufficiently and there is very little clogging over a long period of time - especially in the pressure filtration and dehydration equipment, the progress of the filter cloth 1) Since filtration is always carried out with a washed filter cloth, the cake on the filter cloth is kept relatively thin, and therefore the filtration resistance is small compared to the amount of retardation. It is possible to reduce the pressure to be applied by a fraction. In addition, the upper shell is held at approximately the center of both sides in the filter cloth traveling direction by the suppression adjustment device, and its descent is limited by 1-, and the lowering means is used as a fulcrum to suppress it in the front and back of the traveling direction, so that the upper shell is not pushed. There is no fear that the increase in pressure will directly press the filter cloth and cause an increase in friction during movement, and it is possible to apply the necessary pressing force, and it is possible to increase the pressing force of the partition and reduce the moisture content of the cake. Even when lowering the pressure, it is easy to maintain the balance of the pressing force by adjusting the pressing force of the lowering means located before and after the moving direction.

Therefore, this device not only does not require the use of filter presses, etc., which are expensive and have high maintenance costs, but also does not require a sedimentation tank, and can also be used with a small sludge storage tank to temporarily store sludge. It is sufficient to pressurize the sludge even if the sludge has relatively high filtration resistance, such as mud or excrement, using a pressurizing pump with a pressure of about tKylcti or less - and the moisture content of the final cake recovered from the press roll is sufficient. can be almost as suitable for traditional filter presses.

In addition, since it is a continuous automatic device, it is easy to handle and can reduce labor costs.Furthermore, since it can be incorporated into a frame, it not only occupies a small area when permanently installed, but also can be moved easily. It is also possible to load it into a car for business purposes, and it can also be used jointly by several offices.

The continuous automatic pressurized dewatering device of the present invention not only has excellent functional effects, but also has a relatively simple structure, so it can be supplied at low cost, and its maintenance costs are low. It is extremely useful as a pollution prevention device and can contribute to its widespread use.

[Brief explanation of the drawing]

Figure 1 and Figure 2 are explanatory diagrams showing only the main parts with some parts omitted to explain the embodiment, and Figure 1 is a plan view,
] Figure 12 is a front view. Fig. 3 is a cross-sectional view taken along line A-A in Fig. 1, mainly showing only the pressure filtration and dehydration device, and Fig. 4 is a left side view with a part of Fig. 3 omitted. 1... Frame, 3... Filter cloth, 5... Support roll, 1
3... Pressurization pump, 17... Pressurization 'a, over-dehydration device, 19. Upper shell, 21... Sludge inlet-23...
Upper shell, 25... Drain port, 29... Support rod, 31.
...Top part, 33...Press adjustment tool -35...Supporting metal fitting, 37...Screw rod, 39...Adjustment fixing nut, 4
DESCRIPTION OF SYMBOLS 1... Bearing, 43... Fixing metal fittings, 45... Lowering means (pneumatic cylinder). 49... Bearing, 53... Sealing sheet, 55...
Suppression adjustment plate, 57... Adjustment stud, 59... Adjustment nut, 61... Partition portion, 65... Fixing screw, 67
... Sliding frame, 69... Sliding frame, 71... Drive roll, 75... Receiving roll, 77... Pressing roll, 79
... Variable speed forming machine, 81... Support arm, 85... Scraper, 87... Conveyor, 93... Hoisting machine,
95...Cleaning water tank, +01...Box-shaped roll, +03
Fountain nozzle (ultrasonic fountain nozzle), 107... Squeezing roll, S... Sludge, C, C, C・1 cake.

Claims (4)

[Claims] (1) It is mounted between horizontal and mutually parallel drive rolls and support rolls located at almost both ends of the device, and is index-driven from the support rolls toward the pre-drive roll, and the upper side is connected to the forward process. A belt-shaped endless filter cloth whose lower part is circulated as a return process; a pressurized filtration/dehydration device positioned vertically between the two filter cloths in the outward process following the support roll; A pressure roll that presses through the filter cloth and is driven by friction, and a pressure roll for transferring the cake after pressing and dewatering the cake on the filter cloth, and one or more receiving rolls for dewatering that are pressed against the pressure roll. , a cake peeling means comprising a scraper or the like for peeling off the cake so that the distance between the surface of the pressure roll and the cutting edge is equal to or less than the thickness of the cake to be transferred, and a cleaning device for the filter cloth provided in the return process. The pressurized filtration and dehydration device is mainly composed of an upper shell and an upper shell, which are equivalent to dividing the shell into upper and lower halves by one plane, and this upper shell is The upper shell, which supports the filter cloth and is located in contact with the lower surface thereof, is opposed to the upper surface of the filter cloth at t7, and has a required spacing between the upper shells and is pressed toward the upper shell. It is characterized by having a reduction means consisting of a pneumatic cylinder or the like for applying pressure, and further having a partition part for pressure adjustment on the side surface on the exit side through which the filter cloth passes. Continuous automatic pressurized dehydration equipment. (2) The upper shell and the upper shell are equivalent to dividing a hollow shell consisting of a rectangular hexahedron into two halves, upper and lower by t on a plane parallel to an arbitrary plane, and the width of the filter cloth is approximately at the center. The upper shell is parallel to the traveling direction of the filter cloth and is located above and below the filter cloth in the middle, and the upper shell has a vertical plane that passes approximately through the center of its upper surface and is perpendicular to the traveling direction of the filter cloth and both side surfaces. In the vicinity of the intersection, the parts of the lower shell facing each other are spaced apart from each other at a required distance, and a reduction means such as a pneumatic cylinder is passed through the center and placed on a vertical plane parallel to the traveling direction of the filter cloth. The lower shell has a plurality of supporting branches located at right angles to the traveling direction of the filter cloth and inclined in the opposite direction on the upper surface of the lower shell. A continuous automatic pressurized dewatering device according to claim 1. (3) A sealing sheet made of an elastic material such as rubber or synthetic resin whose partition part presses and seals the gap with the filter cloth on the exit side of the upper shell, and a sealing sheet for pressing down and fixing the sealing sheet. The continuous automatic pressurized dehydration apparatus according to any one of claims 211 to 2, further comprising a suppression adjustment plate that is fixed after being set at a required vertical position. (4) The continuous automatic pressurized dehydration according to any one of claims 1 to 3, wherein the distance between the cutting edge of the cake peeling means and the surface of the suppression roll is about 3 am to about Q, 5 am. Device.