JP2016036798A - Dewatering bag and dewatering apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a "dewatering bag" which has a high filtration capacity and the strength enough to store separated solids and a "dewatering apparatus using the dewatering bag."SOLUTION: A dewatering apparatus includes: a dewatering bag 11 including a storage bag 12 in which a plurality of water permeable holes are formed and a filter cloth 13 provided inside the storage bag 12 to separate cloudy water in which water and solids are mixed into water and solids; a dewatering bag hanging frame 28 for hanging the dewatering bag 11; a treatment tank 23 for stirring cloudy water which has been put therein; an underwater pump 43 for sending out the stirred cloudy water; a flocculation reaction tank 25 for putting a flocculant in the cloudy water sent out by the underwater pump 43 and stirring; and an underwater pump 48 for sending out the cloudy water in which the flocculant has been put. The cloudy water sent out by the underwater pump 48 is put in the dewatering bag 11 held by the dewatering bag hanging frame 28.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a dehydration bag for separating turbid water in which water and a solid are turbid into the water and the solid and a dehydration apparatus using the dehydration bag.

  In the treatment of turbid water containing sludge and the like, a filtration device (dehydration device) that separates water and solids is used to prevent leakage of harmful substances and the like. As the filtration device, a vacuum filtration device using a vacuum differential pressure by a vacuum mechanism, a filter press filtration device using a pressure differential pressure by a pressure mechanism, a belt press filtration device, or the like is used (for example, Patent Document 1, 2). The filter press device disclosed in Patent Document 1 is a filtration device that separates and dehydrates by passing turbid water containing sludge between filter plates arranged in a predetermined direction and narrowing the space between the filter plates.

JP 2012-61473 A JP 2014-18718 A

  The content disclosed in Patent Document 1 is to provide a filter press device that can sufficiently withstand the high pressure required during squeezing, but is a device configuration in which a plurality of filter plates are arranged, and a large amount of turbidity. In order to treat water, there is a problem that the apparatus becomes relatively complicated and large, and costs such as installation costs and maintenance costs increase.

  On the other hand, the turbid water separation treatment apparatus described in Patent Document 2 uses a sandbag as a filter cloth, and can treat the separated flock together with the filter cloth, thereby reducing costs. However, the sandbag is, for example, a purse-type polyethylene cloth bag. To use such a sandbag as a filter cloth, it is possible to prevent leakage of harmful substances even though there is no problem in strength. There is a problem with the filtration capacity. Although it is possible to use sandbags made of filter cloth with high filtration capacity, there is a problem in strength when storing and storing solid materials that have been separated, and in order to use filter cloth with increased strength There are difficulties due to problems such as cost.

  The present invention has been made in view of such circumstances, and is a dehydration bag having high filtration capacity and strength capable of storing separated solids, and a dehydration apparatus using the dehydration bag. It is for the purpose of provision.

  In order to solve the above problems, a dehydration bag according to the present invention is a dehydration bag that separates turbid water in which water and solids are turbid into the water and solids, and has a plurality of water-permeable holes. It becomes the structure which has the formed storage bag and the filter cloth provided in the inner side of this storage bag.

  According to such a configuration, the dehydration bag has a double structure of a storage bag in which a plurality of water permeable holes are formed and a filter cloth provided inside the storage bag, so that it is separated from the turbid material by the filter cloth. Since the water can be discharged from the storage bag and has the strength to store the solid matter left after being separated by the filter cloth, it has a high filtration capacity and the strength to store the separated solid matter. It can be used as a dehydration bag.

  The dehydration bag according to the present invention may have a structure having a suspension member attached to the dehydration bag in order to suspend the dehydration bag.

  According to such a configuration, since the suspension member is attached to the dewatering bag, the dewatering bag filled with turbid water such as sludge is suspended on a hanging tool or the like, and solids and water are separated from the turbid water. Can be separated, so that dehydration is facilitated.

  In the dewatering bag according to the present invention, the suspension member may be a pair of belt-shaped members having both ends sewn to the dewatering bag.

  According to such a configuration, since the pair of belt-like members are mounted as the suspending members, the dehydrating bag can be easily suspended and dehydrated.

  In the dehydration bag according to the present invention, the filter cloth may be provided on the entire inner side of the storage bag by stitching with the storage bag.

  According to such a configuration, since the filter cloth is provided on the entire inside of the storage bag by stitching with the storage bag, discharge of solid matter from the dehydration bag can be suppressed. Furthermore, a dehydration bag having improved strength by stitching can be provided.

  In the dehydration bag according to the present invention, the filter cloth may be composed of a woven or non-woven fabric made of a natural material or artificial material containing flannel.

  According to such a configuration, the filter cloth can be selected according to the particle size of the solid matter contained in the turbid water containing sludge. In particular, by using flannel for the filter cloth, for example, even sludge containing radioactive substances such as cesium can separate solids such as soil containing cesium and the like from water.

  In the dewatering bag according to the present invention, the storage bag can be made of a water-permeable material or a water-impervious material provided with a plurality of drain holes.

  According to such a configuration, in addition to using a coarse water-permeable material as a storage bag, a water-permeable material can be provided with a plurality of drain holes, so that a selection can be made. Can widen the range.

  In the dehydration bag according to the present invention, the storage bag may be a flexible container bag.

  According to such a configuration, the flexible container bag, which is a general-purpose product, is used as the storage bag, so that the dehydration bag can be easily manufactured and the cost can be reduced.

  The dehydrating apparatus according to the present invention includes any one of the dehydrating bags described above, a dehydrating bag holding means for holding the dehydrating bag in a predetermined state, a processing tank for stirring the turbid water that has been added, and the processing tank. A first delivery means for sending the turbid water stirred in step 1 to the outside of the treatment tank, an agglomeration reaction tank for adding and stirring the flocculant to the turbid water sent by the first delivery means, and a flocculant. A second delivery means for delivering the introduced turbid water to the outside of the agglomeration reaction tank, and the turbid water is retained by the dehydration bag retaining means by the second delivery means. It is configured to be put into a bag.

  According to such a configuration, water and solid matter are separated from the turbid water by introducing the turbid water containing the flocculant into the dehydration bag held in a predetermined state for introducing the turbid water. In addition, since it can be easily dehydrated, the separated water can be reused and the solid matter separated from the water can be stored in the dehydration bag. The dehydrating bag holding means corresponds to, for example, a gantry that suspends the dehydrating bag to a predetermined position in order to dehydrate the input sludge, or a dehydrator that is attached to the dewatering bag and spin-dehydrates.

  A dehydration apparatus according to the present invention is charged with a dehydration bag having the above-described suspension member, and a dehydration bag suspension base that suspends the dehydration bag by a suspension that engages with the suspension member of the dehydration bag. A treatment tank for stirring the turbid water, a first delivery means for sending the turbid water stirred in the treatment tank out of the treatment tank, and a flocculant in the turbid water sent by the first delivery means. An agglomeration reaction tank that is charged and stirred; a second delivery means for delivering the turbid water charged with an aggregating agent from the agglomeration reaction tank to the dehydration bag suspended on the dehydration bag suspension; And a first separated water storage tank that stores water separated from the turbid water discharged from the dehydration bag.

  According to such a configuration, the dehydration bag suspended by the dehydration bag suspension base that suspends the dehydration bag by the suspension member that engages with the suspension member is used to suspend the dehydration bag. Is easily separated into water and solids. Moreover, since the 1st separated water storage tank which stores the water isolate | separated from the turbid water was provided, processing, such as reuse or discharge | release, can be performed on the water separated from the turbid water.

  In the dehydrating apparatus according to the present invention, the dewatering bag suspension base includes a separation water receiving table that collects water separated from the turbid water discharged from the dehydrating bag, and the separation water receiving table includes: The first separated water storage tank can be communicated with the first separated water storage tank.

  According to such a configuration, since the separation water receiving tray that collects the water separated from the turbid water discharged from the dehydration bag communicates with the first separation water storage tank, Use of the separated water is facilitated.

  A dehydration apparatus according to the present invention includes a dehydration bag having the above-described suspension member, a dehydrator that suspends the dehydration bag by a positioning tool that engages with the suspension member of the dehydration bag, and rotates and dehydrates the dehydration bag. A processing tank for stirring the turbid water that has been added, a first sending means for sending the turbid water stirred in the processing tank to the outside of the processing tank, and agglomeration in the turbid water sent by the first sending means An agglomeration reaction tank that is charged with an agitation agent, a second delivery means for delivering the turbid water charged with the agglutinating agent from the agglomeration reaction tank to the dehydration bag suspended on the dehydrator, and the dehydration A second separated water storage tank that stores water separated from the turbid water discharged from the machine.

  According to such a configuration, the suspension member mounted on the dehydration bag and the dehydrator positioning tool are suspended by rotation and rotationally dehydrated. Turbid water can be filtered and separated into water and solid matter in a short time. By storing this separated water in the second separated water storage tank, treatment such as reuse or release of the separated water can be performed. It becomes easy.

  In the dehydrating apparatus according to the present invention, the second delivery means is configured to send the turbid water to the dehydrating bag after forming floc and supernatant from the turbid water in the flocculating tank in which the flocculating agent is charged. It can be.

  With such a configuration, after confirming the formation of floc and supernatant from the turbid water charged with the flocculant, the turbid water is sent to the dehydration bag, so that separation of water and solids from the turbid water can be achieved. It can be performed more reliably and easily, and the dehydration effect is improved.

  In the dehydration difference according to the present invention, the first delivery means switches the turbid water delivery to the agglomeration reaction tank to circulation in the treatment tank by opening and closing a valve provided in a connected pipe. The turbid water can be stirred in the processing tank.

  By adopting such a configuration, the turbid water delivery to the agglomeration reaction tank and the turbid water agitation by circulation in the treatment tank are switched by the first delivery means by opening and closing the valve. Can do.

  In the dehydrating apparatus according to the present invention, the second delivery means switches the turbid water delivery to the dehydration bag to circulation in the agglomeration reaction tank by opening and closing a valve provided in a connected pipe. Thus, the turbid water can be stirred in the agglomeration reaction tank.

  According to such a configuration, the second sending means can switch between the sending of the turbid water to the dehydrating bag and the stirring of the turbid water by circulation in the agglomeration reaction tank by opening and closing the valve. it can.

  The dehydration bag according to the present invention has a double structure of a storage bag in which a plurality of water permeable holes are formed and a filter cloth provided on the inner side of the storage bag. Water can be drained from the storage bag, and it has the strength to store the solid matter that has been separated by the filter cloth, so it has high filtration capacity and has the strength to store the separated solid matter. It can be used as a bag.

  Further, according to the dehydrating apparatus according to the present invention, the turbid water containing the flocculant is introduced into the dehydrating bag held in a predetermined state for introducing the turbid water, so that the turbid water and water Since the solid matter can be separated and easily separated and dehydrated, the separated water can be reused and the separated solid matter can be stored in the dehydration bag.

It is the schematic of the bag for dehydration which concerns on the 1st Embodiment of this invention. 1 is a schematic configuration diagram of a dehydrating apparatus according to a first embodiment of the present invention. It is a front view of the suspension stand which comprises the spin-drying | dehydration apparatus shown in FIG. It is a top view of the suspension stand which comprises the spin-drying | dehydration apparatus shown in FIG. It is an AA arrow directional view of the suspension stand which comprises the spin-drying | dehydration apparatus shown in FIG. It is a flowchart which shows the process sequence by the spin-drying | dehydration apparatus which concerns on the 1st Embodiment of this invention. It is the schematic of the bag for dehydration which concerns on the 2nd Embodiment of this invention. It is a schematic block diagram of the dehydration apparatus which concerns on the 2nd Embodiment of this invention. It is the schematic of the bag for dehydration which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
The dewatering bag according to the first embodiment of the present invention is configured as shown in FIG. Furthermore, the dehydrating apparatus according to the first embodiment of the present invention is configured as shown in FIG.

  As shown in FIG. 1, the dehydrating bag 11 includes a cylindrical storage bag 12 having a bottom portion 12a and a side surface portion 12b, a filter cloth 13 sewn on the entire inside of the storage bag 12, and both ends at the bottom. 12a and a pair of suspension belts (suspending members) 15a and 15b stitched to the side surface portion 12b.

  As the storage bag 12, for example, a commercially available flexible container bag (hereinafter abbreviated as “flexible bag”) composed of a sheet and a belt woven with a strong chemical fiber such as polyethylene or polypropylene is used. Can do. As described above, since the belt forming the pair of long loop-shaped hanging parts for suspension is stitched to the bottom part and the side part (providing the reinforcing cloth 16 around the opening), the flexible container bag is sewn. The suspension belts 15a and 15b can also be used. Commercially available flexible container bags include a rectangular shape and a cylindrical shape. In this embodiment, a cylindrical shape is used, but any one can be selected depending on the application. Furthermore, the material, size, etc. can also be selected according to the application, capacity, etc. In addition, the flexible container bag includes a relatively rough weave and a water permeation hole, and a fine weave and a water barrier. The flexible container bag used as the storage bag 12 constituting the dewatering bag 11 uses a bag having a coarsely permeable water permeation hole. Can be used by subjecting a hole to a plurality of water permeation holes (diameter of about 5 to 10 mm).

  The filter cloth 13 that is sewn to the entire inside of the storage bag 12 is appropriately selected according to the type of solid matter contained in the turbid water that is put into the dehydration bag 11 and dehydrated. For example, cesium (a radioactive substance) When separating and filtering water from soil containing Cs) and sludge containing water, it is preferable to use flannel as the filter cloth in order to prevent permeation of cesium combined with the soil. Flannel includes plain wool woven or twill woven, and a blend of wool and synthetic fiber. For example, any one that can prevent permeation of cesium bound to soil is used. You may do it. As shown in FIG. 1, the filter cloth 12 made of flannel is sewn on the entire inner surface of the storage bag 12, and is sewn with a folded portion 13 a provided at the top opening of the storage portion 12. In addition to the flannel described above, other natural fibers, synthetic fibers, blended fibers thereof, paper, and the like can be selected as the filter cloth 12 according to applications.

  Next, with reference to FIG. 2, the outline | summary of the apparatus structure of the dehydration apparatus 21 which uses the above-mentioned dehydration bag 11 is demonstrated. The dehydrator 21 targets sludge, which is turbid water in which soil containing cesium and water are mixed as turbid water to be dehydrated. Hereinafter, the case where water is dehydrated from sludge and soil containing cesium is separated will be described as an example.

  As shown in FIG. 2, the dehydrator 21 is fed with sludge (turbid water) in which soil containing cesium and water is turbid (turbid water), circulates and agitate the sludge, and is sent from the treatment tank 23. The flocculant is introduced into the sludge, and the flocculant reaction tank 25 that circulates and agitate the sludge, the flocculant supply device 27 that injects the flocculant into the agglomeration reaction tank 25, and the flocculant that has been fed into the flocs And a dewatering bag suspension base 28 for suspending the dewatering bag 11 into which the sludge formed with is put.

  As shown in FIGS. 3 to 5, the dewatering bag suspension base 28 is a combination of four columns 31 a, 31 b, 31 c, and 31 d, each of which is inclined through two beam members 32 a and 32 b. The suspension beam 33 is installed between them. A mud pipe 35a is disposed substantially parallel to the suspension beam 33 that is installed in the horizontal direction between the columns 31a and 31b and the columns 31c and 31d. As will be described later, the mud feeding pipe 35 a is a pipe for sending sludge from the agglomeration reaction tank 25 to the dehydration bag 11 suspended from the dehydration bag suspension base 28, and one end thereof is connected to the agglomeration tank 25. The other end is sealed by a member such as a flange. In the mud pipe 25, nozzles 34 a and 34 b for pouring sludge into the dewatering bag 11 suspended from the hanging beam 33 are suspended from a portion disposed in parallel with the hanging beam 33. The nozzles 34a and 34b are respectively provided with flow control valves 36a and 36b for controlling the flow rate of the sludge to be introduced. The flow control valves 36a and 36b may be either electromagnetic valves or manual valves, and actuator valves can also be used. Which of these is to be used can be selected as appropriate according to specifications, operational status, and the like.

  In order to suspend the dehydrating bag 11, hanging tools 38a, 38b, 38c, and 38d that engage with the hanging belts 15a and 15b of the dehydrating bag 11 are fixed to the hanging beam 33. In the present embodiment, one dewatering bag suspension base 28 has a structure in which two dewatering bags 11 are suspended, and one dewatering bag 11 has two suspension belts 15a and 15b. (A pair) is provided, and is suspended by being engaged with two suspension members 38 respectively. The hanger 38 is a hook member in the shape of a fishhook, and has a structure that is hung by hooking the hanger belt 15 on the arc portion.

The dewatering bag suspension base 28 is provided with a separation water receiving table 39 that is a rectangular dish that receives water separated from sludge and hangs down from the dewatering bag 11 just below the two dewatering bags 11 that are suspended. In addition, a separation water storage tank 41 communicating with the separation water receiving base 39 is provided. The separation water receiving base 39 is formed with a water gradient 39a (an inclination of about 1/100 to 1/50) in order to send the separated water toward the separation water storage tank 41.

  The dehydrating apparatus 21 having the above-described dehydrating bag suspension base 28 will be described with reference to FIG. In the treatment tank 23, a sludge pipe 35b for introducing the conveyed sludge penetrates the inside of the treatment tank 23 from the outside. A submersible pump 43 is installed at the bottom of the processing tank 23, and the submersible pump 43 has a function of sending sludge stored in the processing tank 23 to the outside. A sludge pipe 35c connected to the submersible pump 43 is extended to the outside of the processing tank 23, and is branched into sludge pipes 35d and 35e on the way. The sludge pipe 35d is connected to the agglomeration reaction tank 25, and the sludge pipe 35e passes through the top (or wall) of the processing tank 23 so as to return to the processing tank 23, and is disposed toward the inside of the processing tank 23. ing. The sludge pipe 35d is provided with an electromagnetic opening / closing valve 45a, and the sludge pipe 35e is provided with an electromagnetic opening / closing valve 45b, whereby the sludge pipes 35d, 35e can be opened and closed. When the electromagnetic open / close valve 45b is closed and the electromagnetic open / close valve 45a is opened to operate the submersible pump 43, sludge in the processing tank 23 is sent to the agglomeration reaction tank 25 through the sludge pipes 35c and 35d. When the electromagnetic switching valve 45b is opened and the electromagnetic switching valve 45a is closed and the submersible pump 43 is operated, the sludge in the processing tank 23 is circulated to the processing tank 23 through the sludge pipes 35c and 35e. Is made. The processing tank 23 is further provided with liquid level sensors 46 a and 46 b on the side walls of the processing tank 23 for detecting the upper and lower limits of the flow rate of the stored sludge. The liquid level sensors 46a and 46b are respectively connected to a controller (not shown), and the controller can perform opening / closing control of the electromagnetic opening / closing valves 45a and 45b based on the detected value. It is also possible to perform mixing by stirring and mud feeding at the same time by using the above-described electromagnetic open / close valves 45a and 45b in a half-open state. In addition, a manual valve can be used instead of the electromagnetic opening / closing valve, and an actuator valve can also be used. Which type of valve is used and how it is used can be appropriately selected depending on the specification, operation status, and the like.

The agglomeration reaction tank 25 communicates with a sludge pipe 35d through which sludge from the processing tank 23 is sent. A submersible pump 48 is installed at the bottom of the agglomeration reaction tank 25, and this submersible pump 48 has a function of sending the sludge stored in the agglomeration reaction tank 25 to the outside. A sludge pipe 35f connected to the submersible pump 48 is extended to the outside of the agglomeration reaction tank 25, and is branched into sludge pipes 35g and 35h on the way. The sludge pipe 35g is connected to the sludge pipe 35a of the dewatering bag suspension base 28, and the sludge pipe 35h penetrates through the top (or wall) of the agglomeration reaction tank 25 so as to return to the agglomeration reaction tank 25, and the agglomeration reaction. It is arranged toward the inside of the tank 25. Further, an electromagnetic opening / closing valve 45c is installed in the sludge pipe 35g, and an electromagnetic opening / closing valve 45d is installed in the sludge pipe 35h, whereby the sludge pipes 35g, 35h can be opened and closed. When the electromagnetic opening / closing valve 45d is closed and the electromagnetic opening / closing valve 45c is opened to operate the submersible pump 48, the sludge in the agglomeration reaction tank 25 passes through the sludge pipes 35f, 35g, 35a and the nozzles 34 (34a, 34b) and the dehydration bag 11 Is sent to. Further, when the electromagnetic opening / closing valve 45d is opened and the electromagnetic opening / closing valve 45c is closed and the submersible pump 48 is operated, the sludge in the agglomeration reaction tank 25 is circulated to the agglomeration reaction tank 25 through the sludge pipes 35f and 35h. The sludge is stirred in the reaction tank 25.
The agglomeration reaction tank 25 is further provided with liquid level sensors 46c and 46d on the side walls of the agglomeration reaction tank 25 for detecting the upper and lower limits of the flow rate of the stored sludge. The liquid level sensors 46c and 46d are respectively connected to a controller (not shown), and the controller can perform opening / closing control of the electromagnetic opening / closing valves 45c and 45d based on the detected value. Mixing by stirring and mud feeding can be performed by using the electromagnetic opening / closing valves 45c and 45d in a half-open state. In addition, a manual valve can be used instead of the electromagnetic opening / closing valve, and an actuator valve can also be used. Which type of valve is used and how it is used can be appropriately selected depending on the specification, operation status, and the like.

  The flocculant supply device 27 is disposed on the top side of the agglomeration reaction tank 25, and supplies the flocculant to the agglomeration reaction tank 25 by adjusting the timer. As the flocculant, any solid flocculant such as sludge can be formed so as to floc form soil and produce a supernatant. For example, a powdery inorganic flocculant such as zeolite, shirasu, or gypsum is used. In addition, PAC (polyaluminum chloride), sulfuric acid band (aluminum sulfate), polyiron (polyferric sulfate) and other inorganic flocculants, and polyacrylamide organic flocculants (polymer flocculants) ) Can also be used. Specifically, a flocculant in which the solid matter contained in the turbid water easily forms a floc is selected.

  Next, the operation procedure by the dehydrating apparatus shown in FIG. 2 will be described with reference to the flowchart shown in FIG. The target turbid water separates the soil containing cesium (Cs), which is a radioactive substance, and sludge containing water (turbid water) into cesium-containing soil and water, and performs sludge dehydration. It is. For example, when washing and collecting soil contaminated with cesium, gutters, etc., it is possible to prevent scattering of cesium into the atmosphere by spraying water on the soil or gutters. In order to properly dispose of sludge containing water, it is necessary to separate the water from the sludge.

  Sludge sucked and collected by a side groove cleaner (not shown) that sprinkles and cleans the side grooves and the like (brush cleaning) is sent out through the sludge pipe 35b connecting the side groove cleaner and the processing tank 23, and is put into the processing tank 23. (S11). In the processing tank 23, the amount of the introduced sludge is detected by the liquid level sensors 46a and 46b, and when a predetermined amount is introduced, the introduction of the sludge is stopped by control by a controller (not shown).

  In the treatment tank 23 into which a predetermined amount of sludge has been introduced, the electromagnetic switching valve 45a is closed, the electromagnetic switching valve 45b is opened, the submersible pump 43 is operated, and the muddy water is treated with the processing tank 23, the submersible pump 43, the mud pipe 35c, Circulating and stirring to the muddy water pipe 35e and the processing tank 23 (S12). Cesium released into the atmosphere falls with rain and has the property of being attracted to the soil carrying negative ions as cations. Therefore, by sufficiently stirring the sludge sucked and collected from the side groove by watering, cesium contained in the water is combined with soil particles in the sludge. Cesium has a property that it is difficult to separate from the soil, so the water separated from the sludge will contain almost no cesium, allowing disposal of the soil containing cesium and the release and reuse of the separated water. It becomes. For this reason, as described above, it is necessary to sufficiently stir in the processing tank 23 to combine cesium with soil so that the cesium does not float in water.

  After the muddy water is sufficiently stirred in the processing tank 23, when the electromagnetic open / close valve 45b is closed and the electromagnetic open / close valve 45a is opened and the submersible pump 43 is operated to send muddy water, the muddy water becomes muddy water piping 35c. , 35d to the aggregation reaction tank 25 (S13). In the agglomeration reaction tank 25, the amount of the introduced sludge is detected by the liquid level sensors 46c and 46d, and when a predetermined amount is introduced, the mud fed by the submersible pump 43 of the processing tank 23 is controlled by a controller (not shown). Is stopped. It should be noted that mixing by stirring in the processing tank 23 and mud feeding to the agglomeration reaction tank 25 can be simultaneously performed by operating the submersible pump 43 with the electromagnetic open / close valves 45a and 45b being in a half-open state.

  In the agglomeration reaction tank 25 into which a predetermined amount of sludge has been introduced, the electromagnetic on-off valve 45c is closed, the electromagnetic on-off valve 45d is opened, the submersible pump 48 is operated, and the muddy water is agglomerated reaction tank 25, submersible pump 48, mud water piping. It is circulated to 35f, the muddy water pipe 35h, and the agglomeration reaction tank 25 and stirred (S14). As described above, this is because the cesium contained in the muddy water is sufficiently combined with the soil.

  Sufficiently stirring the muddy water in the agglomeration reaction tank 25, and adding a predetermined amount of flocculant to the muddy water from the aggregating agent supply device 27 disposed on the ceiling of the agglomeration reaction tank 25 under the timer control (S15). As described above, as the flocculant, in addition to powdery inorganic flocculants such as zeolite, shirasu and gypsum, inorganic flocculants such as PAC (polyaluminum chloride), organic flocculants (polymer flocculants) Can also be used. By adding a flocculant, a floc of an aggregate formed by combining a number of soil particles containing cesium is formed, and a supernatant is produced. Thus, when muddy water is put into a dewatering bag, which will be described later, and dehydrated, the separated water that is separated from the sludge and hangs down from the dewatering bag can be made substantially free of cesium.

  After the flocculant is added to the agitating mud water in the agglomeration reaction tank 25, the formation of flocs and the generation of a supernatant are confirmed in the mud water. When the formation of floc and the generation of supernatant are not confirmed (NO in S16), the flocculant is continuously charged. When formation of flocs and generation of supernatant are confirmed (YES in S16), the flocculant is stopped and mud feeding to the dehydrating bag 11 is started (S17). The electromagnetic opening / closing valve 45d is closed, the electromagnetic opening / closing valve 45c is opened, and mud feeding by the submersible pump 48 is started. The sludge is sent to the two dewatering bags 11 through the sludge pipes 35f, 35g, 35a and the nozzles 34a, 34b. It should be noted that mixing by stirring in the agglomeration reaction tank 25 and feeding of mud to the dehydration bag 11 can be performed simultaneously by operating the submersible pump 48 with the electromagnetic open / close valves 45c and 45d being half open.

  Sludge is introduced into the two dewatering bags 11 suspended from the dewatering bag suspension base 28 from the nozzles 34a and 34b suspended from the sludge pipe 35a. The amount of sludge introduced is adjusted by opening / closing control by flow control valves 36a and 36b provided near the middle of the nozzles 34a and 34b.

  In the dewatering bag 11 into which a predetermined amount of sludge has been put, the soil and water containing cesium contained in the sludge are separated and filtered by the flannel filter cloth 13 sewn on the entire inside of the storage bag 12 (see FIG. 1). The flannel filter cloth 13 has a fuzzy surface and is formed with a finer mesh width, so that only water can be permeated without permeating the aggregate (floc) of soil containing cesium. As the water is separated and filtered, the flannel filter cloth 13 forms a film made of soil contained in the sludge, and this has a function of promoting sludge filtration.

  The water separated by the filter cloth 13 permeates the storage bag 12 that uses a flexible and water-permeable flexible container bag (see FIG. 1), falls due to its own weight, and is disposed at the bottom of the dehydration bag 11. It is collected in the separation water cradle 39. In addition, when using a water-proof storage bag (flexible bag), a plurality of water permeable holes are formed at the bottom of the storage bag. The separation water receiving table 39 has a water gradient 39 a (an inclination of 1/100 to 1/50), and the water that has flowed through the water gradient 39 a communicates with the separation water receiving table 39. (S18). As described above, cesium has the property of ionically bonding with soil particles, and therefore, when sufficiently stirred in the treatment tank 23 and the agglomeration reaction tank 25, the cesium is strongly bonded to the soil particles and is separated after being bonded. It seems that there is almost no. Then, flocs are formed in the sludge containing soil particles combined with cesium in the agglomeration reaction tank 25. The sludge in which flocks are formed is put into the dewatering bag 11, separated from the sludge, and the water dripping from the dewatering bag 11 becomes almost free of cesium, and the water stored in the separated water storage tank 41 Can be reused or disposed of by release.

  The separation of the soil (including cesium) and the water from the sludge in the dewatering bag 11 is that the water in the sludge falls due to gravity and passes through the filter cloth, so that it takes several hours to separate the sludge. However, it is possible to separate the water from the sludge simply by introducing the sludge into the dewatering bag suspended from the dewatering bag suspension stand 28, and thus a low-cost dewatering apparatus can be provided. In addition, since the water collected after dehydration contains almost no cesium, the separated water can be reused, and the soil containing cesium left in the dehydration bag can be used as a water-impervious bag ( By placing it in a water-impervious flexible container bag as it is, it can be brought into a disposal site without directly touching the hands of workers.

(Second Embodiment)
Next, a dehydration bag according to a second embodiment of the present invention and a dehydration apparatus according to the second embodiment of the present invention using this dehydration bag will be described. The dewatering bag according to the second embodiment of the present invention is configured as shown in FIG. Furthermore, the dehydrating apparatus according to the second embodiment of the present invention is configured as shown in FIG. In the description of the present embodiment, the description of the parts common to the first embodiment will be simplified, and detailed description will be made mainly on the description of the different parts. In addition, description will be made using the same names and reference numerals of components common to the first embodiment.

  As shown in FIG. 7, the dehydrating bag 51 includes a cylindrical storage bag 12 having a bottom portion 12a and a side surface portion 12b, a filter cloth 13 sewn to the entire inside of the storage bag 12, and a side surface portion 12b. This is a configuration having four ring-shaped members (suspending members) 52 (52a to 52d) sewn at equal intervals via a reinforcing cloth 16 near the opening on the upper end side.

  As the storage bag 12, as in the first embodiment, a commercially available flexible container bag woven with strong chemical fibers such as polyethylene or polypropylene can be used. When a commercially available flexible container bag is sewn substantially the same as the above-described ring-shaped member 52, it is used as the ring-shaped member 52. When the same is not sewn, four pieces are used together with the reinforcing cloth 16. The ring-shaped member 52 is stitched to the flexible container bag. Similarly to the first embodiment, the flexible container bag has a coarsely woven water permeation hole, but when using a finely woven water barrier, the bottom 12 or the like has water. Can be used after drilling to provide a plurality of through holes (diameter of about 5 to 10 mm). Further, it is preferable to use flannel as the filter cloth 13 that is sewn to the entire inside of the storage bag 12. The dehydration bag 51 described above has a double structure of the storage bag 12 and the filter cloth 13 sewn inside, but for example, when the amount of turbid water such as sludge to be stored is about 20 to 30 kg. May have a structure made of a filter cloth 13 such as flannel alone without using the storage bag 12 (flexible bag). In this case, the above-described four ring-shaped members (suspending members) 52 (52a to 52d) are stitched into a storage bag made of only a filter cloth to form a dehydration bag. When there is no problem in strength, it can be processed at a lower cost by using a bag for dehydration made only of a filter cloth.

  Next, with reference to FIG. 8, the outline | summary of the apparatus structure of the dehydration apparatus 55 containing the above-mentioned dehydration bag 51 is demonstrated. In the dehydrating device 55, as in the first embodiment, sludge that is turbid water in which soil containing cesium and water is mixed is targeted as the turbid water to be dehydrated.

  As shown in FIG. 8, the dehydrator 55 inputs a sludge in which cesium-containing soil and water are turbid, circulates and agitate the sludge, and a flocculant in the sludge sent from the treatment tank 23. The flocs were formed by adding the flocculant in the flocculant reaction tank 25 that circulates the sludge, the flocculant supply device 27 that injects the flocculant into the flocculant reaction tank 25, and the flocculant in the flocculant reaction tank 25. The dewatering bag 51 into which sludge is thrown is attached by suspending, and a dewatering device 57 for rotating and dewatering, and a separated water storage tank that is installed at the bottom of the dewatering device 57 and stores separated water hanging from the dewatering device 57. 58. The difference between the dehydrating device 55 of the present embodiment and the dehydrating device 21 of the first embodiment is that in the first embodiment, the dewatering bag 11 is suspended from the dewatering bag suspension stand 28 and sludge is introduced. The mechanism for separating and dehydrating is a mechanism for dehydrating the dehydrating bag 51 by the rotation of the dehydrator 57 in the dehydrating device 55 of the present embodiment. Also, the dehydrating bag 51 of the dehydrating device 55 of the present embodiment is different from the first embodiment in which it is suspended from the dehydrating bag suspension base 28, and is installed in the dehydrator 57 for rotational dehydration. A belt-like member is not necessary, and the difference is that the ring-like member 52 is stitched as shown in FIG. Since the processing tank 23, the agglomeration reaction tank 25, the aggregating agent supply device 27, and the like are common including accessories such as sensors and the piping system, the description of these points will be simplified.

  As shown in FIG. 8, the dehydrator 57 mainly includes a case body 58 which is a box, a bottomed cylindrical rotary tub 59 provided inside the case body 58, and a lid provided on the top of the case body 58. 61, and a motor 62 that rotates the rotating tub 59 via a belt 60. The lid 61 is provided at the top of the case body 58 so as to be openable and closable with the hinge 63 as a fulcrum, and has a mechanism that allows the dehydrating bag 51 to be attached to the rotating tub 59 by opening the lid 61. Four fishing hook-shaped positioning pins 65 are provided at equal intervals around the opening at the top of the rotating tub 59. By engaging the ring-shaped member 52 sewn around the opening of the dewatering bag 51 with the positioning pin 65, the dewatering bag 51 can be mounted at a predetermined position of the rotating tank 59. A cylindrical insertion member 67 is provided through the center of the lid 61, and a flexible sludge pipe 71 is fitted into the insertion member 67. One end of the sludge pipe 71 is fitted into the insertion member 67 of the lid 61, and the other end is connected to the sludge pipe 35 g via the connector 62.

  The separated water storage tank 58 disposed at the lower part of the dehydrator 57 is a tank that stores water falling from a water collection part 57 a provided at the bottom of the dehydrator 57. Since the water separated from the sludge by the dehydrator 55 contains almost no cesium, the separated water is stored in the separated water storage tank 58 for reuse or disposal. The separated water storage tank 58 is provided with a liquid level sensor 46e for measuring the amount of stored separated water stored therein, and the controller (not shown) monitors the increase or decrease in the amount of stored water.

  Next, the operation procedure by the dehydrating apparatus shown in FIG. 8 will be described. As in the first embodiment, the sludge is separated from the sludge (turbid water) containing soil and water containing cesium (Cs), which is a radioactive substance, into the soil and water containing cesium. It is.

  The cesium deposited in the gutter etc. is sprinkled with water and sucked and collected as sludge together with the soil by a gutter cleaner and put into the treatment tank 23. In the treatment tank 23, the electromagnetic opening / closing valve 45a is closed, the electromagnetic opening / closing valve 45b is opened, the submersible pump 43 is operated, and the muddy water is transferred to the treatment tank 23, the submersible pump 43, the muddy water pipe 35c, the muddy water pipe 35e, and the treatment tank 23. Circulate and stir. After the muddy water is sufficiently stirred in the processing tank 23, when the electromagnetic open / close valve 45b is closed and the electromagnetic open / close valve 45a is opened and the submersible pump 43 is operated to send muddy water, the muddy water becomes muddy water piping 35c. , 35d to the agglomeration reaction tank 25.

  In the agglomeration reaction tank 25 into which a predetermined amount of sludge has been introduced, the electromagnetic on-off valve 45c is closed, the electromagnetic on-off valve 45d is opened, the submersible pump 48 is operated, and the muddy water is agglomerated reaction tank 25, submersible pump 48, mud water piping. It is circulated to 35f, the muddy water pipe 35h, and the agglomeration reaction tank 25 and stirred. Stirring is sufficiently performed, and a predetermined amount of flocculant is added to the mud from the flocculant supply device 27 disposed on the ceiling of the agglomeration reaction tank 25 under timer control. As described above, the flocculant may be a powdery inorganic flocculant, an inorganic flocculant such as PAC (polyaluminum chloride), an organic flocculant (polymer flocculant), as in the first embodiment. ) Can also be used. After flocculant is added to the stirring mud water in the agglomeration reaction tank 25, when floc formation and generation of supernatant are confirmed, the addition of the flocculant is stopped and mud fed to the dehydration bag 11 is carried out. Start. The electromagnetic opening / closing valve 45d is closed, the electromagnetic opening / closing valve 45c is opened, and mud feeding by the submersible pump 48 is started. The sludge is sent to the dehydration bag 51 attached to the rotary tank 59 of the dehydrator 57 through the sludge pipes 35f and 35g, the sludge pipe 71, and the insertion member 67.

  After a predetermined amount of sludge is put into the dewatering bag 51 fitted with the ring-shaped member 52 to the positioning pin 65 of the rotary tank 59 provided in the dehydrator 57, the coagulation reaction tank 25 The mud is stopped. The amount of sludge sent to the dehydration bag 51 can be controlled by a controller (not shown) by, for example, the detection values of the liquid level sensors 46c and 46d of the agglomeration tank 25 serving as the sending source. After a predetermined amount of sludge is put into the dewatering bag 51, the motor 62 is driven to rotate the rotary tank 59 to dehydrate the sludge. The water contained in the sludge is filtered and separated by the filter cloth 13 due to the centrifugal force due to the rotation, and further passes through the storage bag 12 having water-permeable holes and reaches between the dewatering bag 51 and the rotary tank 59. Since innumerable water-permeable holes are formed in the side surface and bottom surface of the rotary tank 59, the water separated from the sludge is further passed from between the rotary tank 59 and the case body 58 to the separated water storage tank 58 through the water collecting part 57a. Fall. The controller (not shown) detects the amount of water stored in the separated water storage tank 58 by the liquid level sensor 46e.

  As described above, the dehydrating device 55 according to the present embodiment is a mechanism that attaches the dehydrating bag 51 to the dehydrator 57 and dehydrates. Therefore, unlike the dehydration by the falling by the suspension according to the first embodiment, the dehydrating device 55 Since the time can be shortened, the use of the dehydrating device 55 of this embodiment is suitable when a large amount of sludge treatment is performed. Since the water separated by filtration and dehydration and stored in the separated water storage tank 58 contains almost no cesium as described above, it can be reused for other purposes or can be disposed of such as water discharge. As for the soil containing cesium whose capacity has been reduced by dehydration, the dehydration bag is placed in a water-impervious bag (water-impervious flexible container bag) as it is in the first embodiment. It is possible to bring it into a disposal site without directly touching.

(Third embodiment)
Next, a dehydration bag according to a third embodiment of the present invention will be described. The dewatering bag according to the second embodiment of the present invention is configured as shown in FIG. The dehydrating bag 71 according to the present embodiment is of a type that can be used for both the dehydrating apparatus 21 according to the first embodiment of the present invention and the dehydrating apparatus 55 according to the second embodiment of the present invention. It is. Accordingly, the names and symbols of the constituent parts common to the first and second embodiments will be used.

  As shown in FIG. 9, the dehydrating bag 71 includes a cylindrical storage bag 72 having a bottom portion 72a and a side surface portion 72b, a filter cloth 73 sewn on the entire inner side of the storage bag 12, and both ends at the bottom. A pair of suspension belts (suspending members) 75a, 75b sewn to the 12a and the side surface portion 12b, and four ring-shaped members (suspending members) 77a, 77b, 77c, 77d sewn to the pair of suspension belts 75a, 75b. It is the structure which has. Four ring-shaped members (suspending members) 77 a, 77 b, 77 c, 77 d are sewn to a pair of suspension belts 75 a, 75 b near the upper end of the side surface of the storage bag 72. In addition, when the thing equivalent to said ring-shaped member 77a-77d is not stitch | sutured to the commercially available flexible container bag, it is necessary to attach | wear with a stitch | separation separately. The pair of suspension belts 75a and 75b is sewn to the side surface portion 72b of the storage bag 72 via a reinforcing cloth 78, and further engages with the suspension member 38 (38a to 38d) of the dewatering bag suspension base 28. Is fitted with a cylindrical belt protector 81. A reversing belt 83, which is a ring-shaped member, is stitched to the bottom 72a of the storage bag 72, and a slip bag 85 formed of a transparent resin is stitched to the side surface 72b. Since the material of the storage bag 72 and the filter cloth 73 are the same as those described in the first and second embodiments, the description thereof is omitted.

  The dehydrating bag 71 according to the present embodiment uses a commercially available flexible container bag. When the dehydrating bag 71 is suspended on the dehydrating bag suspension base 28 of the dehydrating device 21 and dehydrated, it is attached to the dehydrator 57 of the dehydrating device 55 and dehydrated. It can be used in any case. When dewatering by hanging on the dewatering bag suspension base 28, the belt protector 81 portion of the dehydration bag 71 is hung on the suspension 38 of the dehydration bag suspension base 28. When the dehydrator 57 is attached and dehydrated, the ring-shaped member 77 of the dehydration bag 71 is hung on the positioning pin 65 of the rotating tub 59 and suspended.

  As described above, the dehydration bag 71 according to the present embodiment can be used for both the dehydration device 21 that is suspended from the dehydration bag suspension base 28 and dehydrated, and the dehydration device 55 that is attached to the dehydrator 57 and dehydrated. Furthermore, since a commercially available flexible container bag is used, it is easy to manufacture, is easy to use, and is provided at a lower cost. When the dehydrator 57 is attached to the dehydrator 57 and used for the dehydration device 55, for example, when the amount of turbid water such as sludge to be stored is a small amount of about 20 to 30 kg, the outer storage bag 72 (flexible bag etc. ) May be used and the filter cloth 73 may be composed of a flannel or the like. In this case, the above-described four ring-shaped members (suspending members) 77 (77a to 77d) are sewn into a storage bag made of only a filter cloth to form a dehydration bag. When there is no problem in strength, it can be processed at a lower cost by using a bag for dehydration made only of a filter cloth.

  A dehydration bag according to the present invention and a dehydration apparatus using the dehydration bag are a dehydration bag having a double structure of a storage bag having a plurality of water permeable holes and a filter cloth provided inside the storage bag. Therefore, the water separated from the turbid material can be discharged from the storage bag, has the strength to store the remaining solid material, and further reuses the separated water and treats the solid material separated from the water. It has an effect of being easy, and is useful as a dehydration bag for separating turbid water in which water and solids are turbid into water and solids, and a dehydration apparatus using the dehydration bag.

DESCRIPTION OF SYMBOLS 11 Bag for dehydration 12 Storage bag 13 Filter cloth 15 (15a, 15b) Hanging belt (hanging member)
DESCRIPTION OF SYMBOLS 16 Reinforcement cloth 21 Dehydration device 23 Processing tank 25 Coagulation reaction tank 27 Coagulant supply tank 28 Dehydration bag suspension stand 51 Dehydration bag 55 Dehydration device 57 Dehydrator 59 Rotating tank 71 Dehydration bag

Claims (14)

A dehydration bag for separating turbid water in which water and solids are turbid into water and solids,
A storage bag having a plurality of water permeable holes;
And a filter cloth provided inside the storage bag.   The dehydration bag according to claim 1, further comprising a suspension member attached to the dehydration bag to suspend the dehydration bag.   The dewatering bag according to claim 2, wherein the suspension member is a pair of belt-shaped members having both ends sewn to the dewatering bag.   The dehydrating bag according to any one of claims 1 to 3, wherein the filter cloth is provided on the entire inner side of the storage bag by stitching with the storage bag.   The dehydrating bag according to any one of claims 1 to 4, wherein the filter cloth is made of a woven or non-woven fabric made of a natural material or artificial material containing flannel.   The dehydration bag according to any one of claims 1 to 5, wherein the storage bag is made of a water-permeable material or a water-impervious material provided with a plurality of drain holes.   The dehydration bag according to any one of claims 1 to 6, wherein the storage bag is a flexible container bag. Dehydration bag according to any one of claims 1 to 7,
Dehydration bag holding means for holding the dehydration bag in a predetermined state;
A treatment tank for stirring the turbid water that has been charged;
First delivery means for delivering the turbid water stirred in the treatment tank to the outside of the treatment tank;
An agglomeration reaction tank in which an aggregating agent is added to the turbid water sent by the first delivery means and stirred;
A second delivery means for delivering the turbid water charged with a flocculant to the outside of the agglomeration reaction tank,
A dehydrating apparatus in which the turbid water is put into the dehydrating bag held by the dehydrating bag holding means by the second delivery means. A dehydration bag according to claim 2 or 3,
A dewatering bag suspension base that suspends the dehydration bag by a suspension that engages with the suspension member of the dehydration bag;
A treatment tank for stirring the turbid water that has been charged;
First delivery means for delivering the turbid water stirred in the treatment tank to the outside of the treatment tank;
An agglomeration reaction tank in which an aggregating agent is added to the turbid water sent by the first delivery means and stirred;
A second delivery means for feeding the turbid water charged with a flocculant from the agglomeration reaction tank to the dehydration bag suspended on the dehydration bag suspension;
A dewatering apparatus comprising: a first separated water storage tank that stores water separated from the turbid water discharged from the dewatering bag.   The dewatering bag suspension base includes a separation water receiving table that collects water separated from the turbid water discharged from the dewatering bag, and the separation water receiving table is configured to store the first separated water storage. The dehydrating apparatus according to claim 9, wherein the dehydrating apparatus is in communication with a tank. A dehydration bag according to claim 2;
A dehydrator that suspends the dewatering bag by a positioning tool that engages with the suspension member of the dewatering bag and rotates and dehydrates the dewatering bag;
A treatment tank for stirring the turbid water that has been charged;
First delivery means for delivering the turbid water stirred in the treatment tank to the outside of the treatment tank;
An agglomeration reaction tank in which an aggregating agent is added to the turbid water sent by the first delivery means and stirred;
Second delivery means for delivering the turbid water charged with a flocculant from the agglomeration reaction tank to the dehydration bag suspended from the dehydrator;
And a second separated water storage tank for storing the water separated from the turbid water discharged from the dehydrator.   The said 2nd delivery means sends out the said turbid water to the said dehydration bag after formation of a flock and a supernatant from the turbid water in the said flocculation tank in which the said flocculant was thrown into. Dehydration apparatus as described.   The first delivery means switches the turbid water delivery to the agglomeration reaction tank to circulation in the treatment tank by opening and closing a valve provided in a pipe to be connected, and The dehydration apparatus according to any one of claims 8 to 12, wherein the turbid water is stirred.   The second delivery means switches the turbid water delivery to the dehydration bag to circulation in the agglomeration reaction tank by opening and closing a valve provided in a pipe to be connected. The dehydration apparatus according to claim 8, wherein the turbid water is stirred.

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