KR100257025B1 - Construction to moisture exclude of sludge - Google Patents

Abstract

PURPOSE: A sludge dewatering treatment equipment is provided, which can dewater sludge free from the sort of sludge effectively in a short time, slough off sludge cake attached on the filter cloth automatically and wash the filter cloth, so that the operation is easy and the system can save maintenance cost. CONSTITUTION: The system comprises the followings: (i) a sludge dewatering equipment (1) that has an upper chamber (130) and down chamber (140); (ii) an upper chamber (130) that has a sludge inlet (110) and an air inlet (120) at the both side top, an air chamber (160) set outside the upper chamber (130) for injecting high pressure air to the upper chamber (130) and a cylinder (150) for lifting the upper chamber (130); (iii) a down chamber (140) that has a drain fan (250) and a drain hole (260) at the bottom for receiving and draining the dewatered water; and (iv) a filter cloth (210) that is driven by a driven roller (221) and moves between the upper chamber (130) and the down chamber (140), an air injecting nozzle (230) at an end of side for sloughing off sludge cake from the filter cloth (210) and a water spraying nozzle (240) at the other side for washing the filter cloth (210).

Description

Sludge Dewatering Treatment System

The present invention is not limited to the type of sludge, the water contained in the various sludge can be dehydrated in a short time efficiently and automatically remove the sludge cake squeezed on the filter cloth and easy to operate by allowing automatic cleaning of the filter cloth And a sludge dewatering treatment device capable of reducing maintenance costs. The sludge is introduced into the sludge dispersing device by a pump from a sludge tank to induce the sludge to be evenly distributed in the upper chamber, and the sludge introduced into the upper chamber. Is filtered by its own weight in one step to be dehydrated through the lower chamber below, and by injecting high pressure air in two steps to filter and dewater to the residual moisture remaining in the sludge, and then press the first and second steps The sludge dehydrated by squeezed into the filter cloth was caked and dehydrated at the top. The upper chamber is raised by the mounted cylinder, and the filter cloth is conveyed by the driving motor. At this time, the sludge cake pressed on the filter cloth is completely separated from the filter cloth by the scraper while being separated from the filter cloth by the air spray nozzle continuously sprayed. Meanwhile, the filter cloth is washed by the water sprayed from the water spray nozzle on the other side, and is introduced between the upper chamber and the lower chamber for the next process. When the preparation of the next process is completed, the upper chamber is lowered again by the upper cylinder and coupled to the lower chamber, and the sludge dewatering treatment apparatus for allowing the circulation process to be automatically performed as the sludge flows into the upper chamber again.

In general, a dewatering treatment device commonly used is a filter press device and a belt press device. The filter press device is introduced from a concentration tank into a filter plate by a high pressure pump. The dewatered sludge is dehydrated only depending on the filling pressure of the pump and the pressing force of the cylinder, so the dewatering time is long and the dehydration rate is lowered. In addition, the desorption method of the dewatered sludge cake is also inconvenient that a worker must always reside in order to process the sludge cake which is not detached from the filter plate by manual or vibration method. Due to the dehydration efficiency is reduced, the life of the filter cloth is also shortened. Recently, a manual washing method has been used to compensate for these drawbacks, but it is difficult to reverse washing (backwashing), which is only a form, and some sludges due to the forward washing are embedded in the filter cloth deeper and hard to expect a great effect.

In addition, the belt press (BELT PRESS) device, which is one of the conventional dehydrator, is to pass the filter cloth belt between the two rollers, so that the filter cloth belt is compressed by the roller while passing through the roller. When the sludge containing water stored in the thickener flows into the sludge tank, the sludge flows into the filter cloth belt inlet while the filter belt passes through the sludge tank. The sludge introduced in this way is passed between the rollers as they are collected between the filter cloth belts. At this time, the rollers compress the filter cloth belts to dehydrate the water contained in the sludge while passing through the rollers.

The remaining sludge is caked by compression with a roller and pressed onto the surface of the filter cloth belt. The sludge that has been compressed and caked by the filter cloth belt is conveyed and discharged by the filter cloth belt. In the roller pressing process, the sludge is caught in the upper and lower filter cloth belts, and clogging occurs, and the dehydration efficiency gradually decreases. In addition, there is a hassle that the belt is frequently replaced due to severe damage to the filter cloth belt by pressing by the roller.

As such, the conventional sludge dewatering treatment device dehydrates the sludge for a certain period of time, resulting in dehydration efficiency deterioration due to a clogging phenomenon in the filter or filter cloth. When the sludge treatment contains sharp impurities or other impurities, the filter or filter cloth is damaged and cannot be treated.The filter cloth or filter is easily damaged because it is dehydrated from the filter cloth belt or filter plate by pressing or pumping pressure. There was an uneconomical problem.

In addition, the conventional filter press device or belt press device is capable of treating only high concentration slits, so in order to dehydrate sludge containing low concentrations of water containing a large amount of water, a thickening tank must be installed separately to concentrate the sludge in a concentration tank and then dewatered. Therefore, the economic loss due to the installation of the thickening tank, as well as having a large installation area has a problem that is not suitable for installation in a narrow place.

On the other hand, in case of filter press, sludge should be introduced into the filter plate at high pressure, so only high pressure pumps can be used, and there is no compatibility of pumps, and the pumping life is shortened to maintain proper high pressure. . In addition, since the pressure flowing into the filter cannot be adjusted according to the type of sludge, there is a non-productive problem in that unnecessary time is wasted in order to increase and maintain the dewaterable pressure. It is difficult to expect high dewatering efficiency because the pressing force cannot be adjusted according to the sludge.

Therefore, the conventional dewatering device should be inspected by the operator from time to time in the overall work process, and damage to the filter or filter cloth caused by the sharp foreign matter contained in the sludge is frequently caused, and economical loss, and the filter or filter cloth should be changed. In addition, the work time is prolonged by various tasks involved indirectly, resulting in an inefficient operation. In addition, sludge that adheres and solidifies, such as cement sludge, abrasives and scrap sludge discharged from metal and nonmetal polishing plants, can damage the filter or filter cloth. There has been a problem that can only be done.

Therefore, the present invention has been made to solve the above problems, to provide a dewatering device for dehydrating water contained in all kinds of sludge without regard to the type of sludge, there is an object of the present invention, dehydration After the automatic removal of the caked sludge pressed on the filter cloth and the automatic washing device of the filter cloth, the entire process of the dehydration process is fully automated, so that the dehydration time is shortened and the dehydration process is also caused by the weight of moisture contained in the sludge. After the first dehydration, the residual water remaining in the sludge is dehydrated through the secondary air using compressed air to increase the dewatering efficiency and to prevent damage of the filter cloth caused by the sludge by using air pressure. There is another purpose for doing so. In addition, the present invention can treat a large amount of sludge in a short time by adjusting the one-step dehydration time according to the sludge concentration, and even in the case of low concentration sludge, it is possible to dehydrate without the installation of the concentration tank to reduce the installation cost, minimize the installation area and Another object of the present invention is to facilitate the maintenance and operation of the equipment.

The present invention for achieving the above object,

In the dewatering treatment device 1 for various sludges,

The upper chamber 130 and the lower chamber 140 through which the upper and lower portions are formed, and the upper chamber 130 is provided with the slot inlet 110 and the air inlet 120 formed on the other side thereof. The cylinder 150 for elevating operation is provided at the upper end of the upper chamber 130, and the air chamber 160 for supplying high pressure air to the upper chamber 130 through the air inlet 120 to one side of the upper chamber 130. Is provided, the filter cloth 210 is circulated by the driving roller 221 between the upper chamber 130 and the lower chamber 140 is provided, and communicates with the lower chamber 140 under the filter cloth 210. The drain pen 250 is provided to receive the water dehydrated in the sludge so as to be drained through the drain outlet 260, and the caked sludge compressed to the filter cloth 210 has an air spray nozzle 230 housing 200. I put it on one end and let a cake and a sludge separate from a filter cloth, It was completely detached by the scraper 300, with the construction that the water injection nozzle 240 is provided with features for cleaning the filter cloth 210 in the housing 200 the other end.

1 is a front sectional view showing an installation state of the present invention,

2 is a plan view showing an installation state of the present invention,

Figure 3 is an enlarged cross-sectional view "A" part showing the combination of the upper and lower chambers of the present invention,

Figure 4 is a perspective view showing a sludge dispersion device interposed in the present invention,

5 is a front view showing a means and a washing means for automatically removing the hard caked slotted by being compressed to the filter cloth and dewatered while the filter cloth is rotated by the drive of the drive motor.

※ Brief description of the major symbols in the drawings

1: sludge dewatering treatment device 2: sludge 100: case 110: sludge inlet

120: air inlet 130: upper chamber 131, 141: fixing members 132, 142: rubber pad

133, 143: body 134: circular projection 135, 145: bolt 140: lower chamber

144: protruding surface 150: cylinder 151: rod 160: air chamber 200: housing

210: filter cloth 220: drive motor 221: drive roller 222: driven roller

223: support roller 224: tension control device 225: chain 230: air spray nozzle

240: water spray nozzle 250: drain pen 300: scraper

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the present invention will be described in detail.

1 is a front sectional view showing an installation state of the present invention, Figure 2 is a plan view showing an installation state of the present invention, Figure 3 is an enlarged cross-sectional view "A" part showing the combination of the upper chamber and the lower chamber of the present invention, Figure 4 is a perspective view of the sludge dispersing device is disclosed in the present invention, Figure 5 is a filter cloth is transported by the drive of the drive motor for automatically cleaning the filter cloth and the means for removing the sludge paper sludge cake attached to the filter cloth It is a front view showing a means.

1 and 2, the slot 130 is provided at one side of the upper surface of the upper chamber 130, and the air inlet 120 is provided at the other side, and the cylinder 150 is fixed at the center of the upper surface. It is mounted. When the sludge is injected into the sludge inlet 110, the sludge dispersion device 170 is fixedly mounted in the upper chamber 130 so that the sludge is uniformly distributed downward.

The sludge dispersing device 170 has a rectangular duct shape through which the upper part is perforated as shown in FIG. 4, and the rectangular duct 172 dispersed in the central duct 171 on both sides is similarly in a state where both are perforated. Sludge is formed in the sludge inlet 110 of the upper surface of the upper chamber 130 has a plurality of outlets 173 are formed on both bottom surfaces of the ducts 171 and 172 that are in communication with each other and are dispersed in the center and both sides. When introduced into the duct 171, and then distributed evenly distributed to the duct 171, 172 on both sides of the upper chamber 130 through the discharge port 173 formed on the lower surface of both sides of the duct 171,172 It will fall inside.

On the other hand, the sludge dispersion device 170 is mounted on the upper end of the upper chamber 130, so as to operate in conjunction with the upper chamber 130 by the operation of the cylinder 150 to be elevated by the operation of the cylinder 150 have. The upper chamber 130 which is lifted and operated as described above is in close contact with the lower chamber 140 at the bottom to maintain airtightness, and the structure thereof is fixed to the fixing member 131 along the lower surface of the upper chamber 130 as shown in FIG. 3. Is fixed by the bolt 135 and the rubber pad 132 having a shape in which the round circular protrusion 134 protrudes out of the fixing member 131 while the body 133 is inserted into the fixing member 131. Is inserted.

Meanwhile, the fixing member 141 is similarly supported on the upper surface of the lower chamber 140 by the bolt 145 along the upper surface of the lower chamber 140, and is inserted into the fixing member 131 of the upper chamber 130. The body portion 143 is inserted into the fixing member 141 fixed to the upper surface of the lower chamber 140 by the bolt 145 so as to be in contact with the circular protrusion 134 of the rubber pad 132 that has been sealed. And a protruding surface 144 that meets the circular protruding portion 134 on the surface of the fixing member 141 is formed integrally with the body portion 143, the upper chamber (lifting operation by the operation of the cylinder 150) The circular protrusion 134 and the protruding surface of the rubber pads 131 and 141 are disposed between the upper chamber 130 and the lower chamber 140 while the 130 is lowered to contact the upper surface of the lower chamber 140. 144 abuts to maintain airtightness. When the upper chamber 130 and the lower chamber 140 are combined, the sludge flows into the sludge dispersing device 170 through the sludge inlet 110 and is evenly distributed in the upper chamber 130 by the sludge dispersing device 170. . The sludge introduced into the upper chamber 130 is dehydrated by its own weight in one step. When the pressure in the upper chamber 130 due to the inflow of the sludge reaches a predetermined pressure (adjustable), the compressed air is passed through the air inlet 120. Inflow, secondary dehydration proceeds.

On the other hand, the air chamber 160 for blowing high-pressure air into the air inlet 120 formed on one side of the upper chamber 130 is fixedly mounted on one side of the case 100.

When the first and second stage dehydration is completed, the upper chamber 130 is raised by the cylinder 150, and the driving motor 220 fixed to the upper surface of one side of the housing 200 drives the driving roller 221. The filter cloth 210 to which the caked sludge 2 is attached is transported out through the upper chamber 130 and the lower chamber 140. As the filter cloth 210 is transported, air is injected from the air spray nozzle 230 toward the filter cloth 210, and the cake-shaped cake sludge 2 compressed on the filter cloth 210 is sprayed from the air spray nozzle 230. It is to be removed by the air which becomes. In accordance with the rotation of the driving roller 221 in the position facing the air injection nozzle 230 and the filter cloth 210 in order to completely shake off the sludge removed by injecting air to the filter cloth 210 as described above. The scraper 300 is connected to a chain or the like so as to completely remove the sludge from the filter cloth 210 and start dropping it from the filter cloth 210 so as to drop the sludge collector.

In this case, the filter cloth 210 is installed in the driving roller 221 fixed to one side of the housing 200 and the driven roller 222 fixed to the other side, and supported by the support roller 223 fixed to the bottom of the housing 200. In addition, the tension control device 224 is fixedly mounted on the proper portion of the housing 200 to allow the circulation to be transported, and to prepare the tension of the filter cloth 210 in preparation for the drop of the tension of the filter cloth 210 due to the dehydration process for a long time. Lose.

Meanwhile, after the removal of the cake sludge 2 is completed by the air spraying nozzle 230, the filter cloth 210 is circulated by the driving roller 221 and circulated to the other side. Water is sprayed toward the filter cloth 210 to remove the sludge 2 caked by the air spray nozzle 230, and then finely drop the impurities compressed in the filter cloth 210 again, and filter cloth 210 ) To clean the gaps and to keep the filter cloth 210 always clean.

Meanwhile, a drain pen 250 is connected to the lower chamber 140 and fixedly coupled to the housing 200 downward to collect the dehydration filtrate dewatered from the sludge to form a drain outlet formed at the front of the drain pen 250 ( 260), the dehydration amount is sent to the sump or recycled.

According to the configuration as described above will be described in detail the operating state of the present invention.

The present invention is a cement sludge produced in a ready-mixed concrete or a fume pipe plant or a sludge produced in ceramic production, a sludge sludge produced in a ceramic plant or a sludge produced in a wastewater treatment plant, and a sludge scrap sludge produced in a metal and nonmetal polishing plant, or various food wastes. As a dewatering sludge dewatering treatment apparatus of the present invention, the dehydration treatment process of the present invention is dewatered in two stages, the water contained in the sludge is dehydrated by its own weight and the process of dehydration by compression of compressed air Going through.

First, when the sludge mixed with water is stored in the sludge tank (not shown), the sludge is flowed from the sludge tank to the sludge dewatering treatment device 1 by a pump (not shown), as shown in FIG. Sludge containing moisture is introduced into the sludge inlet 110 provided on the upper chamber 130.

In order to prevent the injected sludge from being concentrated at a predetermined part and to be evenly distributed in the upper chamber 130, the sludge dispersing device 170 is fixedly supported at the upper end of the upper chamber 130. The sludge dispersing device 170 is formed while the upper duct 171 of the through-hole is transversely formed inside the upper chamber 130 and a plurality of ducts 172 communicate with both sides of the central duct 171, The sludge injected into the sludge dispersing device 170 flows along the duct 171 of the central portion, and the sludge flows along the duct 172 of the side portions communicating with both sides. The sludge flowing in this way is dropped downward along a plurality of outlets 173 formed in the lateral side surfaces of the ducts 171 and 172.

Since water is present in the sludge that falls in this way, water and the sludge freely fall through the outlet 173 of the ducts 171 and 172, and the water passes through the filter cloth 210, and the sludge is on the filter cloth 210. Is loaded. Meanwhile, the water passing through the filter cloth 210 passes through the lower chamber 140 and is collected in the drain pan 250 that is fixed to the housing 200 and drained to the water collecting tank through the drain outlet 260.

Meanwhile, as the amount of sludge loaded on the filter cloth 210 increases, the drainage speed of the water passing through the filter cloth 210 becomes slow, and the internal pressure of the upper chamber 130 gradually increases. When the pressure in the upper chamber 130 reaches a predetermined pressure or when the sludge inflow elapses for a predetermined time, the sludge conveying pump (not shown) is stopped and compressed through the air inlet 120 attached to the upper chamber 130. As air flows into the upper chamber 130, two-stage dehydration proceeds. Compressed air generated in the compressor (not shown) is introduced into the upper chamber 130 through the air chamber 160. The inlet pressure is adjusted according to the type of the sludge to shorten the dehydration time and increase the dehydration efficiency.

When dehydration of the first and second stages is completed, the pressurization in the upper chamber 130 is automatically released to the outside, and the upper chamber 130 is raised while the cylinder 150 mounted on the upper side is operated. At this time, the drive roller 221 and the scraper 300 connected to the chain 225 by the operation of the drive motor 220 is rotated, the cake fabricated sludge (2) pressed on the filter cloth 210 while the filter cloth 210 is moved. Exits between the upper chamber 130 and the lower chamber 140. At the same time, compressed air is injected from the air spray nozzle 230 installed at the lower part of the driving roller 221 to separate the sludge 2 compressed on the filter cloth 210 from the filter cloth 210, and the caked sludge 2 that has been separated. Is completely removed from the filter cloth 210 by the scraper (300). The drive motor 220 is operated until the sludge cake 2 of the rear is completely removed from the filter cloth 210, and the air spray nozzle 230 and the filter cloth 210 for the automatic cleaning water spray nozzle 240 are driven motor. Link with 220.

Here, the role of the water spray nozzle 240 is to remove the impurities, such as fine sludge and filter cloth remaining in the compressed air injected from the air spray nozzle 230 to leave the sludge cake (2) and dirty filter cloth (210) ) To clean. In addition, the filter cloth 210 is installed in the driving roller 221, the driven roller 222 and the support roller 223 to move.

Meanwhile, when the filter cloth 210 cleaned by the water spray nozzle 240 is positioned above the lower chamber 140, the cylinder 150 mounted on the upper surface of the upper chamber 130 operates to lower the upper chamber 130. do. The lowered upper chamber 130 is in contact with the upper surface of the lower chamber 140, as shown in Figure 3, wherein the fixing member 131 fixed to the lower surface of the upper chamber 130 by the bolt 135 The body 133 is inserted therein and the circular protrusion 134 protrudes from the circular protrusion 134 onto the surface of the fixing member 131. Similarly, the lower chamber 140 is inserted into the fixing member 141 fixed by the bolt 145 along the upper surface of the lower chamber 140, and a slight protruding surface on the surface of the fixing member 141. Rubber pad 142 having a (144) is provided, the lower and upper circular chamber 134 of the upper chamber 130 and the projecting surface 144 of the lower chamber 140 meet each other and apply mutual pressure to the upper and lower chambers It is possible to maintain the confidentiality between (130) and (140).

At this time, the filter cloth 210 is pressed while the circular protrusion 134 of the upper chamber 130 and the protruding surface 144 of the lower chamber 140 press the filter cloth 210 positioned between the upper chamber 130 and the lower chamber 140. The sludge existing in the upper side is pushed to both sides by the circular protrusion 134, which is the sludge in the pressing area on the filter cloth 210 when the upper chamber 130 and the lower chamber 140 is pressed. If present, to prevent the airtightness is not maintained in advance, and serves to push the sludge 2, etc. in contact with the circular protrusion 134 in the upper chamber 130, the outside and at the same time to maintain the mutual airtight This is to ensure the airtightness between the upper chamber 130 and the lower chamber 140 and to protect the filter cloth 210 at the same time.

When the upper chamber 130 and the lower chamber 140 are in close contact with each other, the sludge flows back into the sludge dispersing device 170 through the sludge inlet 110 and repeats and circulates the operation as described above.

The series of repetition and circulation processes described above are operated automatically by a control unit (not shown), and the operating conditions of all processes can be arbitrarily adjusted and set.

Therefore, according to the present invention, after the sludge is put into the upper chamber, dehydration proceeds by the self-weight of the sludge containing water in the first step, and in the second step, the sludge accumulated on the upper surface of the filter cloth is injected by pressing high-pressure compressed air. It is a two-stage dehydration method that dehydrates the residual water remaining in the sludge.It can increase the dehydration efficiency and process a large amount of water in a short time than the case of dehydrating water by pressing the filter belts by the conventional filter press method or the filter cloth belt. Do. In particular, adhesive sludge such as cement or sludge containing sharp foreign substances produced by metal and non-metal polishing may damage the filter cloth or the belt and the like, and thus the present invention may not be treated by conventional dehydration. Regardless of the sludge, it can dehydrate the contained moisture.

In addition, the present invention adopts a sludge removal device attached to the filter cloth is a two-step (1 step; air spray escape, 2 steps; water spray cleaning device) treatment method that can not be found in other facilities, the sludge attachment surface opposite Adopting backwashing method to wash in the direction, perfect cleaning effect is obtained. After passing through the 1st stage washing (slit release) device, the remaining fine sludge and impurities adhering to the filter cloth are removed and washed in the secondary water spray nozzle to keep the surface of the filter cloth clean at all times, and increase the dehydration efficiency and the life of the filter cloth. Can be extended. As in the case of conventional filter presses or belt presses, the operation is stopped after dehydration for a certain period of time (hours), and thus, the operator does not need to remove or wash the remaining cakes compressed on the filter plate or the belt filter cloth. It is possible to make the most of the surplus manpower required in time, to process a large amount of slots in a short time, and to carry out the work continuously.

In addition, the present invention, unlike the dewatering method of dewatering the high concentration of sludge by first concentrated in the thickening tank in the dehydration process of the conventional low concentration sludge, because the low concentration of the sludge can also be dehydrated without the concentration tank, such as a concentration facility, ancillary facilities, etc. It can reduce the equipment cost because it is not necessary and can make the most of the effective space by minimizing the installation place of the dehydration treatment device.

In addition, since the whole process is handled automatically, the operation of the sludge dewatering treatment device can be facilitated, and the control system that can arbitrarily adjust the dewatering time and pressure according to the type of sludge can save unnecessary dehydration time. It will maximize the efficiency.

Claims (3)

In the dewatering treatment device 1 for various sludges, The upper chamber 130 and the lower chamber 140 through which the upper and lower portions are formed, and the upper chamber 130 is provided with the slot inlet 110 and the air inlet 120 formed on the other side thereof. The cylinder 150 for elevating operation is provided at the upper end of the upper chamber 130, and the air chamber 160 for supplying high pressure air to the upper chamber 130 through the air inlet 120 to one side of the upper chamber 130. Is provided, the filter cloth 210 is circulated by the driving roller 221 between the upper chamber 130 and the lower chamber 140 is provided, and communicates with the lower chamber 140 under the filter cloth 210. The drain pen 250 is provided to receive the water dehydrated in the sludge so as to be drained through the drain outlet 260, and the caked sludge compressed to the filter cloth 210 has an air spray nozzle 230 housing 200. I put it on one end and let a cake and a sludge separate from a filter cloth, Sludge dewatering apparatus as were completely detached by a scraper 300, a housing 200, a configuration that the water injection nozzle 240 is provided with features for the other end to wash the filter fabric (210). The method of claim 1, The through-hole rectangular duct 171 is formed long in the longitudinal direction, and a plurality of ducts 172 communicating with the duct 171 are formed on both sides, the respective ducts 171, 172 on both lower end surfaces By forming a plurality of outlets 173, when the sludge is introduced through the sludge inlet 110, the sludge flows along the duct 171 of the center, is dispersed in both ducts 172, evenly in the upper chamber 130 There is a sludge dispersing device 170 to be dispersed, the rod 151 of the cylinder 150 provided in the upper surface of the case 100 is connected to the upper chamber 130, the upper surface is fixed to the upper chamber 130 Sludge dewatering treatment apparatus, characterized in that. The method of claim 1, The body 133 is inserted into the fixing member 131 fixed by the bolt 135 along the lower surface of the upper chamber 130, which is an abutting portion of the upper chamber 130 and the lower chamber 140, and the fixing member is inserted into the fixing member 131. A rubber pad 132 having a circular protrusion 134 protruding while being integral with the body 133 is formed on a surface thereof, and a lower chamber corresponding to a bottom surface of the upper chamber 130. 140, the body portion 143 of the rubber pad 142 is inserted into the fixing member 141 which is fixed by the bolt 145 along the top surface, and is integral with the body portion 143 on the surface of the fixing member 142. The sludge dewatering treatment device, characterized in that the projecting surface 144 is formed to be in contact with the circular protrusion 134 to maintain the airtightness between the upper, lower chamber 130, 140.