JP2006289241A - Dehydration method of sewage sludge, and its apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dehydrating apparatus efficiently dehydrating sludge to a low moisture content, and smoothly discharging dehydrated and solidified sludge to the outside with a reduced energy consumption. <P>SOLUTION: This dehydrating apparatus comprises: a flat frame body; a cylindrical air-permeable filter medium along the inner peripheral face of the frame body; a water guiding panel provided with grooves in a vertical direction on a face in contact with at least the flexible filter medium, in which its lower part is exposed from the lower part of the frame body and which is attached to front and rear wall inner faces; a bottom lid pinching the lower part of the flexible filter medium at the lower part of the frame body to close it; a moisture absorbing panel provided in parallel with the front and rear wall inner faces roughly at the center in the cross direction in the body; a suction pump sucking inside of the water absorbing panel; an air sending pump in the water absorbing panel; a selector valve connecting one of the suction pump and air sending pump to the water absorbing panel; and a water permeating sheet separated from the surface of the water absorbing panel when air is sent into the panel. Thus, sludge is efficiently dehydrated and sludge can be easily discharged from the dehydrating apparatus. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention stores fluid hydrates such as sludge in a storage tank, allows the filtered water to flow out from the lower part of the storage tank, and further filters and absorbs water inside the storage tank to efficiently dehydrate fluid hydrates. The present invention relates to a dehydrating method and a dehydrating apparatus.

  There is known a dehydration method in which sludge containing a large amount of water is put into a storage tank, the water in the sludge is filtered and sucked from a suction pipe disposed in the sludge, and the sludge is dehydrated.

  In this dehydration method, the solid matter of sludge adheres to the periphery of the suction tube, and the filter provided in the suction tube is likely to be clogged. There is. Therefore, an invention is known in which an air supply pipe is installed in the sludge, air bubbles are generated around the suction pipe by the air sent out from the air supply pipe, and the sludge adheres to the suction pipe and water absorption is stopped. .

  In addition, there is known an invention of a dehydrating apparatus that dehydrates sludge and then sends air to the suction pipe to separate the solidified sludge after dehydration from the suction pipe and easily discharge the dewatered sludge from the dehydrating apparatus.

JP 2000-325998 A

  However, in the invention for generating air bubbles inside the storage tank containing sludge, an air supply pump for sending air bubbles is installed, and electric power for operating the installed air supply pump is always required.

  Further, in the invention in which moisture is sucked with a suction pipe and sludge is fixed around the suction pipe and the solid content is peeled off by air supply, moisture is sucked from all the sludge stored in the storage tank to It is difficult to attach sludge to the surroundings. As described above, when a certain amount of sludge adheres to the periphery of the suction pipe, the sludge attachment does not proceed in a state where the sludge containing moisture remains in the tank.

  Normally, even if air is sent into the suction pipe to separate the sludge solids from the suction pipe, all of the sludge does not adhere to the suction pipe, and liquid sludge not attached to the suction pipe enters the storage tank. The remaining sludge was to be dropped into liquid sludge.

  Further, when the liquid level of the sludge decreases with water absorption, the upper part of the suction pipe is exposed from inside the sludge, and air suction at the exposed portions increases, so that water is not sucked from the sludge.

  An object of the present invention is to provide a dehydration method and a dehydration apparatus that can efficiently dehydrate sludge to a low water content with a simple configuration and can smoothly discharge solidified sludge after dehydration.

In order to solve the above-described object, the present invention has a dehydrating method and a dehydrating apparatus as follows.

  1. A filtration step of flowing a fluid hydrate into a storage tank provided with a flexible filter medium, filtering moisture contained in the fluid hydrate with a flexible filter medium, and discharging it to the outside of the storage tank; The negative pressure is applied to the water absorption panel provided inside the storage tank while introducing the outside air taken from the outside of the storage tank around the flexible filter medium, and the water contained in the fluid water-containing material is absorbed into the water absorption panel. A water absorption process to suck in, a pressure separation process in which air is pumped into the water absorption panel to expand the surface of the water absorption panel and the solid matter adhering to the surface of the water absorption panel is separated from the water absorption panel, and the lower end of the flexible filter medium is opened And the dehydration method was comprised from the discharge process which drops solid content from the lower part of a flexible filter medium, and discharges | emits it from a storage tank.

  In the filtration step, filtration may be performed by applying pressure to the fluid hydrated material in addition to filtering by the weight of the fluid hydrated material. The filtered water is discharged from a discharge port or the like provided in the lower part or the side surface of the storage tank.

  It is preferable to provide the water absorption panel so that the contact area with the fluid hydrated material becomes wide. The negative pressure applied to the water absorption panel may be changed, and further, a positive pressure may be temporarily applied when the negative pressure changes.

The expansion of the water absorption panel is performed by providing a sheet-like film material that expands from the surface of the water absorption panel when air is pumped into the water absorption panel, for example. The lower end of the flexible filter medium is preferably opened and closed by opening and closing the bottom lid of the storage tank.
2, a flat frame body in which the front and rear wall surfaces are close to each other, a top plate that covers the top surface of the frame body, and a cylindrical body along the inner peripheral surface of the frame body, with the upper end fixed to the upper part of the frame body, A flexible filter medium having air permeability with a lower end extending downward from the lower part of the frame, a pressure-feed pipe for pumping a fluid hydrated substance into the flexible filter medium, and at least contacting the flexible filter medium A water guide panel mounted on the inner surface of the front and rear walls with a groove on the surface in the vertical direction, with the bottom end exposed from the bottom of the frame to the outside of the frame, and a water guide panel that can be opened and closed at the bottom of the frame. With the bottom edge of the panel exposed from the bottom of the frame to the outside of the frame, close the bottom of the frame, close the bottom of the flexible filter medium from the front and rear, and close the top and bottom on the front and back A water absorbing panel provided with a groove extending in the direction and a filter medium covering the upper surface of the groove, and provided in parallel with the front and rear wall bodies at the approximate center in the front-rear direction in the frame body; And a connected suction pump grooves water panel to constitute a dewatering device.

  You may attach the upper end of a flexible filter material not to the upper part of a frame but to the lower surface of a top plate, etc. The lower end of the water guide panel is not directly exposed to the outside of the frame body from the lower part of the frame body, and a groove formed in the water guide panel may communicate with the outside air through a gap formed between the frame body and the bottom cover. . Further, a drain pipe may be attached to the lower end of the water guide panel, and the water flowing down from the lower end of the water guide panel may be guided to a predetermined place.

  Further, an air supply pipe may be connected to the lower end of the water guide panel, and air or the like may be sent into the groove of the water guide panel from the air supply pipe. The air sent into the groove of the water guide panel may be warm air, dried air, or the like in addition to the outside air, and the delivery pressure for sending out the air may be changed with time.

  The fluid hydrated material may be introduced into the frame without using a pressure feeding tube. In that case, for example, an openable / closable lid is provided above the frame body, and the fluid hydrated substance introduced from the open / close lid into the frame body is filtered by its own weight.

  Further, the front and rear wall bodies may be formed of a perforated plate having a plurality of holes on substantially the entire surface without providing the water guide panel on the front and rear wall bodies of the frame body. In this case, it is preferable to provide a drainage channel for receiving moisture flowing out from the hole of the wall body at the lower part of the front and rear wall bodies. Further, a cover plate or the like is provided on the perforated portions of the front and rear wall bodies so as to air-tightly cover the holes so that air is supplied to the holes. The front and rear wall plates may be formed of a perforated plate in which a large number of holes are formed in a metal plate by pressing, or may be formed of a material such as a sintered plate having water permeability.

  There may be a plurality of water absorbing panels instead of one. Moreover, it may be provided inclining with respect to the wall body, not parallel to the front and rear wall bodies.

  In the dehydrating apparatus of 3 or 2, an air supply pump connected in the water absorption panel, a switching valve for connecting one of the suction pump and the air supply pump to the water absorption panel, and the surface of the water absorption panel due to an increase in internal pressure by the air supply pump The dehydrating apparatus was configured with a water-permeable sheet provided on the surface of the water-absorbing panel, which peeled from the water-absorbing panel.

  According to the dehydration method of the present invention, the fluid water-containing product can be dehydrated to a predetermined moisture content by the filtration step, and the water-absorbing step further sucks moisture contained in the fluid water-containing product and draws the flexible filter material while flowing. It can be dehydrated until the solid hydrate is solidified. Then, the solid matter of the fluid hydrated product can be separated from the water absorption panel by the peeling step, and the solid matter of the fluid hydrated product can be easily dropped from the inside of the flexible filter medium and discharged from the storage tank by the discharging step.

  According to the dehydrating apparatus according to the present invention, fluid hydrous material such as sludge introduced through a pressure feed pipe is pressurized in the dehydrating apparatus, the sludge is filtered through a flexible filter medium or a water guide panel, and the dehydrator is passed through the water guide panel. The filtered water can be discharged from the bottom.

  When a perforated plate or the like is used, the water filtered by the flexible filter material flows out from the dehydrator through the hole formed in the wall.

  Moisture can be sucked from the sludge through the water absorption panel by operating the suction pump. When moisture is sucked in, outside air is introduced into the frame through the water guide panel, so the pressure difference between the water absorption panel and sludge can be maintained at all times, and filtration and water absorption can be performed efficiently without causing clogging of the filter. Become.

  Further, when a perforated plate or the like is used, outside air flows into the dehydrator through the hole formed in the wall body to the outer surface of the flexible filter medium.

  When the volume of sludge decreases according to the suction of moisture, the internal volume of the flexible filter medium decreases, and the sludge is pressed against the surface of the water absorption panel. By operating the suction pump even after absorbing moisture, air is sucked through the flexible filter medium, and the sludge can be air-dried by the air passing through the sludge.

  As described above, since air is introduced into the frame body through the water guide panel, it is not necessary to install an air supply pump as in the prior art, and electric power for operating the air supply pump can be made unnecessary.

  The flexible filter media moves with water absorption and agglomerates sludge on the surface of the water absorption panel, so there is no exposure of the water absorption panel due to lowering of the sludge liquid level, and all of the sludge thrown into the flexible filter media Can be solidified and fixed around the water absorbing panel. In addition, new sludge can be added to the inside of the flexible filter medium.

  By sending air from the air supply pump to the water absorption panel, the internal pressure of the water-permeable sheet can be increased and the water-permeable sheet can be expanded. Thereby, the sludge adhering to the water absorption panel surface can be easily peeled from the water absorption panel. By opening the bottom lid, the lower side of the flexible filter medium can be opened, and the sludge peeled off from the water absorption panel can be reliably and easily discharged from the bottom of the dehydrator.

  By closing the bottom lid of the dewatering device, the lower portion of the flexible filter medium can be closed, and the sludge dewatering operation can be repeated by reusing the flexible filter medium.

  An embodiment of a dehydration method and a dehydration apparatus according to the present invention will be described by taking a dehydration apparatus for dehydrating by filtering water from sludge as an example.

  As shown in FIG. 13, the dewatering device 1 stores the sludge and stores the sludge, and sends the sludge from the sludge tank 4 to the storage tank 2 and applies pressure to the sludge inside the storage tank 2. It comprises a delivery pump 6, a suction pump 8 connected to the storage tank 2 via a water storage tank 9, an air supply pump 10 for pumping air, and the like.

  The delivery pump 6 is a pump that sucks sludge from the sludge tank 4 and pumps the sucked sludge. The suction pump 8 is a pump that sucks air in the water storage tank 9 and makes the inside of the water storage tank 9 have a negative pressure close to vacuum. The water tank 9 is a hermetically sealed container, and moisture or the like accumulated inside is appropriately discharged out of the water tank 9 by a pump (not shown). The air supply pump 10 is a compression pump that sends out air with increased pressure.

  As shown in FIG. 1, the storage tank 2 includes a frame body 12 in which four wall bodies 11 are connected, a top plate 14 that covers the upper surface of the frame body 12, a bottom lid 16 that is attached to the lower surface of the frame body 12, and the like. The front and rear wall bodies 11 of the frame body 12 are substantially square, and are formed in a flat box shape in which the interval between the front and rear wall bodies 11 is reduced.

  The top plate 14 is attached to the frame 12 in a watertight manner, and a pressure feeding pipe 18 connected to the delivery pump 6 is attached to the top plate 14. The pressure feeding pipe 18 is bifurcated at the upper part of the top plate 14, the tip divided at the center in the width direction of the top plate 14 is arranged at the front and back, and a one-way valve 19 is provided for each of them and connected. . The one-way valve 19 is a one-way valve that opens in the inflow direction to the storage tank 2 and closes in the direction of flowing out of the storage tank 2. The one-way valve 19 may be an operating valve that is mechanically or electrically opened and closed as appropriate.

  As shown in FIG. 2, the bottom lid 16 includes two lids 17 extending in the lateral width direction of the storage tank 2, and the lid 17 is rotated forward and backward from the center of the frame 12 in the front-rear direction. Open and close. Each lid plate 17 is provided with a drive mechanism (not shown) such as a cylinder mechanism, and is driven to open and close by the drive mechanism. In addition, rubber pieces 21 that are in close contact with each other when the bottom lid 16 is closed are attached to the end surface of the lid plate 17 on the rotating side along the longitudinal direction.

  A water guide panel 20 is provided inside the storage tank 2 along the front and rear wall bodies 11. As shown in FIG. 3, the water guide panel 20 includes a resin holding plate 22 having a groove 23 in the longitudinal direction of the storage tank 2, and a filter 24 having air permeability and attached to the front and back of the holding plate 22. Thus, the lower part of the water guide panel 20 is exposed to the outside of the storage tank 2 through the gap between the wall 11 and the lid plate 17 with the bottom lid 16 closed as shown in FIG. As shown in FIG. 4, the water guide panel 20 may be opened only on one surface side of the holding plate 22 so that the groove 23 is inside the storage tank 2, and the filter 24 is pasted on the upper surface of the groove 23. Not necessary.

  A water absorption panel 26 is provided at the center inside the storage tank 4. The water absorption panel 26 has the same configuration as the water guide panel 20, a filter 24 having air permeability is attached to the front and back of the holding plate 22 having the grooves 23 on both sides, and moisture filtered from sludge and air introduced from the outside are provided in the grooves 23. It is possible to pass inside. The water absorption panel 26 has a size substantially equal to the vertical and horizontal lengths inside the storage tank 2 and is provided in parallel with the front and rear wall bodies 11 at the approximate center in the front-rear direction of the storage tank 2.

  A water-permeable sheet 28 is attached to the front and back surfaces of the water absorption panel 26. The water-permeable sheet 28 is made of a material having high water permeability and slightly low air permeability. The water-permeable sheet 28 covers the entire water-absorbing panel 26. It is attached with some margin in shape.

  A tube body 30 is attached to the upper part of the water absorption panel 26. The pipe body 30 communicates with the inside of the groove 23 and extends through the top plate 14 to the water storage tank 9 (see FIG. 11). The water storage tank 9 is a sealed container. When the suction pump 8 is operated, a negative pressure is generated inside the water storage tank 9 and a suction force acts on the tube body 30.

  Further, a switching valve 32 is provided in the middle of the tubular body 30 and is connected to the air supply pump 10 via the switching valve 32, and the air supply pump 10 is operated by switching the switching valve 32 to the air supply pump 10 side. Then, air is sent into the water absorption panel 26.

  The storage tank 2 is further provided with a flexible filter medium 34 made of a flexible material having air permeability and water permeability. A perspective view of the entire configuration of the storage tank 2 is shown in FIG. The flexible filter medium 34 has a cylindrical shape having a sufficient width and length along the entire inner surface of the storage tank 2. The upper end is fixed between the top plate 14 and the wall body 11 of the storage tank 2, and the lower end is When the bottom lid 16 is closed, it is sandwiched from the front and rear by the rubber piece 21 in a state along the inner surface shape of the storage tank 2. A metal fitting (not shown) for opening and closing the lower end of the flexible filter medium 34 is attached to the lower end of the flexible filter medium 34 so that the flexible filter medium 34 can be easily closed from the front and rear by the bottom cover 16. It may be.

  Next, the operation of the dehydrator 1 will be described.

  The dehydrator 1 is installed at a construction site where sludge is generated as shown in FIG. In addition, you may make it install the spin-drying | dehydration apparatus 1 in a processing place, and process the sludge which was conveyed with the spin-drying | dehydration apparatus 1 instead of installing directly on-site. Further, the sludge tank 4 may not be provided, and the sludge may be sent directly to the storage tank 2 by the delivery pump 6.

  The storage tank 2 is singly or plurally mounted on a stand or the like, and the bottom lid 16 is installed so that it can be opened and closed.

  First, as shown in FIG. 5, the bottom cover 16 is closed. The bottom cover 16 is closed and the flexible filter medium 34 is sealed with the rubber piece 21, and the flexible filter medium 34 is made to follow the entire inner surface of the storage tank 2.

  Next, the delivery pump 6 is operated, and the sludge is put into the storage tank 2 as shown in FIG. The sludge passes through the pressure feed pipe 18 and is introduced from the top plate 14 into the flexible filter medium 34. Sludge thrown into the flexible filter medium 34 is filtered by the flexible filter medium 34, and water flows out of the storage tank 2 through the groove 23 of the water guide panel 20.

  As shown in FIG. 7, after filling the inside of the storage tank 2 with sludge, the delivery pump 6 is continuously operated to increase the pressure in the storage tank 2 and filter the sludge. The sludge thrown into the storage tank 2 is prevented from flowing back in the direction of the pressure feed pipe 18 by the one-way valve 19, and the pressure in the storage tank 2 is maintained.

  Thereby, a water | moisture content can be filtered from sludge and the moisture content of sludge can be reduced.

  When the amount of water flowing out from the bottom of the storage tank 2 decreases, the operation of the delivery pump 6 is then stopped and the suction pump 8 is operated. When the suction pump 8 is operated, the inside of the water storage tank 9 becomes negative pressure, the inside of the groove 23 of the water absorption panel 26 passes through the tube body 30, and the sludge is filtered to suck moisture. The sucked water is stored in the water storage tank 9. Further, even if the inside of the groove 23 of the water absorption panel 26 becomes negative pressure by the suction pump 8, the lower part of the water guide panel 20 is exposed from the storage tank 2. Since air flows between the wall bodies 10, the pressure difference between the water absorption panel 26 and the sludge can be maintained, and moisture contained in the sludge can be efficiently sucked.

  In FIG. 8, the state which attracted | sucked the water | moisture content from the sludge in the flexible filter medium 34 through the water absorption panel 26 is shown. The sludge in which moisture has been sucked is reduced in volume and solidified, and adheres to the surface of the water absorption panel 26 while being stored in the contracted flexible filter medium 34. Further, the suction force of the suction pump 8 is changed or the switching valve 32 is operated to send the air supply from the air supply pump 10 to the water absorption panel 26 temporarily. May be repeated. Then, it becomes possible to apply vibration to the sludge in the flexible filter medium 34 to stir the sludge, and to suck the moisture contained in the sludge more efficiently.

  Even after the water suction by the water absorption panel 26 is reduced, the suction pump 8 is operated as it is, and the air introduced into the storage tank 2 through the water guide panel 20 is sucked through the sludge. Thereby, sludge is air-dried.

  When the air drying of the sludge is completed, the suction pump 8 is stopped, the switching valve 32 is operated, the water absorption panel 26 is connected to the air supply pump 10, and air is sent from the air supply pump 10 to the water absorption panel 26. Then, the water-permeable sheet 28 swells outward as shown in FIG. 9, and the solidified sludge adhering to the surface of the water-absorbing panel 26 (more precisely, the surface of the water-permeable sheet 28) is peeled off and dropped off. The sludge solidified from the bottom cover 16 opened before or after the operation of the air feed pump 10 falls out of the storage tank 2.

  If the sludge is discharged out of the storage tank 2, the bottom cover 16 is closed, the flexible filter medium 34 is closed with the cover plate 17, and the sludge is again input into the storage tank 2 to perform dehydration as described above. Repeatedly.

  Next, another example of the dehydrating apparatus according to the present invention will be described.

  As shown in FIG. 10, the dehydrator 1 is provided with a drain passage 36 in the bottom lid 16 along the lower ends of the front and rear wall plates 11 at the bottom of the storage tank 2, and further opens the end of the drain passage 36 to the outside air. Thus, the groove 23 of the water guide panel 20 is communicated with the outside air.

  If the dehydrating apparatus 1 is configured in this way, the moisture flowing down in the groove 23 of the water guide panel 20 passes through the drainage passage 36 and can be discharged from the outlet of the drainage passage 36 to the outside of the storage tank 2. Further, when moisture is sucked from the water absorption panel 26, outside air is introduced into the groove 23 through the drainage passage 36, and water absorption can be efficiently performed while maintaining the pressure difference between the water absorption panel 26 and sludge.

  Further, an air supply pump (not shown) may be connected to the drainage passage 36 so that air can be supplied into the drainage passage 36 from the air supply pump. In this case, it is preferable that drainage from the drainage passage 36 is always possible. By supplying air from the air supply pump, the periphery of the flexible filter medium 34 can be pressurized through the groove 23, and the water suction efficiency of the water absorption panel 26 can be increased. Furthermore, the sludge can be dehydrated and dried more efficiently by sending warm air or dry air from the air feed pump and causing the water absorption panel 26 to suck the warm air or dry air. In addition, by changing the air supply pressure sent from the air supply pump and applying vibration to the flexible filter medium 34, moisture is uniformly absorbed from the sludge stored in the flexible filter medium 34. Can be aspirated.

  Further, in the suction panel 26, the suction force of the suction panel 26 may be changed, or the suction operation may be temporarily stopped, and pressurized air may be sent into the suction panel 26. In this way, greater vibrations can be imparted to the sludge stored in the flexible filter medium 34, and when the suction is resumed, the sludge is stirred, and moisture is also efficiently removed from the sludge located away from the suction panel 26. Can suck. Note that warm air or the like may be supplied to the suction panel 26.

  Another example of the dehydrating apparatus is shown in FIG. Compared with the configuration of the dehydrating apparatus 1 of the above example, the dehydrating apparatus 3 does not use the water guide panel 20 and has a punching metal or the like having a large number of holes 41 on the entire surface by pressing the front and rear wall bodies 11. A perforated plate 40 was used, and a cover plate 42 was further provided outside the perforated plate 40.

  The bottom lid 17 is rotatably attached to the lower end of the cover plate 42. When the bottom lid 16 is closed, the inside of the storage tank 2 is made airtight by the top plate 14, the cover plate 42, and the bottom plate 17. Further, the lower part between the cover plate 42 and the perforated plate 40 communicates with the outside of the storage tank 2 as a drainage passage 44, and the air supply pump (see FIG. 5) in the space between the cover plate 42 and the perforated plate 40. Not shown.) Other configurations are the same as those in the above example.

  According to this dewatering device 3, when sludge is introduced into the storage tank 2, the holes 41 formed in the perforated plate 40 are filtered with the flexible filter medium 34 by their own weight or by pressurization of the delivery pump 6. The water flows out of the storage tank 2 and is discharged to the outside of the storage tank 2 through the drainage passage 44 between the cover plate 42 and the perforated plate 40.

  When water is sucked from the water absorption panel 26, outside air flows from the drainage passage 44 between the cover plate 42 and the perforated plate 40, and always maintains the pressure difference between the water absorption panel 26 and sludge. Can do.

  Further, by supplying air from the air supply pump into the space defined by the cover plate 42 and the perforated plate 40, the periphery of the flexible filter medium 34 can be pressurized through the hole 41 of the perforated plate 40, and the water absorption The panel 26 can suck moisture efficiently. In this case, the air supply from the air supply pump does not escape from the drainage passage 44 so that the pressure in the space does not decrease. Furthermore, the sludge can be dehydrated and dried more efficiently by sending warm air or dry air from the air feed pump and causing the water absorption panel 26 to suck the warm air or dry air. In addition, by changing the air supply pressure from the air supply pump and applying vibration to the flexible filter medium 34, moisture is uniformly absorbed by the water absorption panel 26 from the sludge stored in the flexible filter medium 34. Can be aspirated.

  Furthermore, also in the dehydrating apparatus 3, the suction force of the suction panel 26 may be changed as described above, or the suction operation may be temporarily stopped and the pressurized air may be sent into the suction panel 26. In this way, greater vibration can be imparted to the sludge stored in the flexible filter medium 34, and when the suction is resumed, the sludge is agitated, and moisture is also efficiently removed from the sludge located away from the suction panel 26. Can suck.

  In the above example, the dewatering device for dewatering sludge has been described. However, the dewatering device of the present invention is not limited to the one for dewatering sludge, and may be used for dewatering other fluid hydrated substances such as food and industrial products. Is possible.

It is a perspective view which shows one Embodiment of the storage tank concerning this invention. It is sectional drawing which shows a storage tank. It is a figure which shows a water absorption panel. It is a figure which shows the other example of a water guide panel. It is sectional drawing which shows a storage tank. It is sectional drawing which shows a storage tank. It is sectional drawing which shows a storage tank. It is sectional drawing which shows a storage tank. It is sectional drawing which shows a storage tank. It is sectional drawing which shows the other example of a storage tank. It is sectional drawing which shows the other example of a storage tank. It is a perspective sectional view showing a storage tank. It is a perspective view showing one embodiment of a dehydrating device concerning the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 3 Dehydrator 2 Storage tank 4 Sludge tank 6 Delivery pump 8 Suction pump 9 Storage tank 10 Air supply pump 11 Wall body 12 Frame body 14 Top plate 16 Bottom cover 17 Cover plate 18 Pressure feed pipe 19 One-way valve 20 Water guide panel 21 Rubber Piece 22 Holding plate 23 Groove 24 Filter 26 Water absorption panel 28 Water passing sheet 30 Tubing body 34 Flexible filter medium 36 Drainage passage 40 Perforated plate 41 Hole 42 Cover plate 44 Drainage passage

Claims (8)

A filtration step of flowing a fluid hydrate into a storage tank equipped with a flexible filter medium, filtering the moisture contained in the fluid hydrate with the flexible filter medium and discharging it to the outside of the storage tank;
Applying negative pressure to the water absorption panel provided inside the storage tank while introducing outside air taken in from the outside of the storage tank to the periphery of the flexible filter medium, and absorbing moisture contained in the fluid hydrated material A water-absorbing process that is filtered and sucked by a panel;
A peeling step of pumping air into the water absorbing panel to expand the surface of the water absorbing panel and peeling off the solids adhering to the surface of the water absorbing panel from the water absorbing panel;
A dehydrating method comprising: a discharging step of opening a lower end of the flexible filter medium, dropping the solid content from a lower portion of the flexible filter medium, and discharging the solid content from the storage tank. A flat frame with close wall spacing on the front and rear surfaces;
A top plate covering the top surface of the frame;
A cylindrical shape along the inner peripheral surface of the frame body, the flexible filter medium having air permeability with the upper end fixed to the upper part of the frame body and the lower end extended downward from the lower part of the frame body;
A pumping tube for pumping fluid hydrated matter into the flexible filter medium;
At least a groove extending in the vertical direction on the surface in contact with the flexible filter medium, and a water guide attached to the inner surfaces of the front and rear wall bodies with a lower end exposed from the lower part of the frame body to the outside of the frame body A panel,
The lower portion of the frame body is provided to be openable and closable, and the lower end of the water guide panel is exposed to the outside of the frame body from the lower portion of the frame body. A bottom lid that sandwiches and closes the lower part of the material from the front-rear direction;
A water absorption panel provided with a groove extending in the vertical direction on the front and back surfaces and a filter medium covering the upper surface of the groove, provided substantially parallel to the front and rear wall bodies in the front-rear direction center of the frame body;
And a suction pump connected to the groove of the water absorption panel. An air pump connected to the water absorption panel;
A switching valve for connecting either the suction pump or the air supply pump to a water absorption panel;
The dehydration apparatus according to claim 2, further comprising: a water flow sheet provided on the surface of the water absorption panel, which is peeled off from the surface of the water absorption panel due to an increase in internal pressure by the air supply pump. The dehydrating apparatus according to claim 2 or 3, wherein an air feed pump is connected to a lower end of the water guide panel so that air can be pumped from the air feed pump into the groove. The dehydrating apparatus according to claim 2 or 3, wherein the front and rear wall bodies are provided with water permeability, and are not provided with a water guide panel along the front and rear wall bodies. The dehydrating apparatus according to claim 5, wherein the front and rear wall bodies are perforated plates in which a plurality of holes penetrating in the front and back direction are formed. The dehydrating apparatus according to claim 5, wherein the front and rear wall bodies are plate members made of a sintered member. A cover plate is provided in an airtight manner outside the front and rear walls, and an air supply pump is connected to a closed space formed by the cover plate and the front and rear walls, and air is supplied from the air supply pump into the closed space. The dehydrator according to any one of claims 5 to 7, which is capable of being pumped.

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