JP2009190011A - Dehydrating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the technique for improving the throughput of a dehydrating apparatus where a liquid component comprised in a workpiece is sucked, so as to perform dehydration. <P>SOLUTION: The dehydrating apparatus 10 includes: a rotatably provided rotor 1; and a pressure reduction mechanism. The rotor 1 includes: a plurality of buckets 5 arranged in the circumferential direction to the rotary axis 1a of the rotor 1 and receiving a workpiece W; and filters 6 provided at the plurality of buckets 5 so as to be brought into contact with the workpiece W. The pressure reduction mechanism alternately performs the pressure reduction in the opposite face opposite to the contact face brought into contact with the workpiece W in each filter 6 and the stop of the pressure reduction synchronously with the rotation of the rotor 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dehydrating apparatus, and more particularly to a dehydrating apparatus that dehydrates by sucking a liquid component contained in a processing object.

  One method of dehydrating operation for separating a liquid from a mixture of a solid material and a liquid is to suck a liquid component contained in the processing object. When the other surface of the filter is depressurized while one surface of the filter (filter medium) is in contact with the object to be processed, the liquid component is sucked through the filter, whereby the liquid component can be separated from the object to be processed. In this specification, an operation for separating a liquid from a mixture of a solid and a liquid is described as a “dehydration” operation, and an apparatus for performing the dehydration operation is described as a dehydration apparatus. Note that liquids other than water can be used.

  According to Applicants' investigation, liquid aspiration is one of the most effective methods for separating liquid components, particularly from a mixture of sand and liquid components (eg, sewage). However, most of the dehydrating devices that perform dehydrating operation by suction are batch-type dehydrating devices, and the throughput of the dehydrating operation is not high.

  From such a background, it is desired to provide a technique for improving the throughput of a dehydrating apparatus that performs dehydration by sucking a liquid component contained in a processing object.

  An object of the present invention is to provide a technique for improving the throughput of a dehydrating apparatus for dehydrating by sucking a liquid component contained in a processing object.

  In order to achieve the above object, the present invention employs the means described below. In the description of the means, in order to clarify the correspondence between the description of [Claims] and the description of [Best Mode for Carrying Out the Invention], [Best Mode for Carrying Out the Invention] ] Are used for reference. However, the appended numbers and symbols should not be used to limit the technical scope of the invention described in [Claims].

  The dehydrating apparatus (10) of the present invention includes a rotor (1) provided rotatably and a pressure reducing mechanism (9, 11, 12, 15). The rotor (1) includes a plurality of buckets (5) for receiving a processing object (W) arranged in a circumferential direction with respect to a rotation axis (1a) of the rotor (1), and the plurality of buckets (5 And a filter (6) provided so as to be in contact with the processing object (W). The pressure reducing mechanism (9, 11, 12, 15) is opposite to the contact surface of the filter (6) that is in contact with the object to be processed (W) in synchronization with the rotation of the rotor (1). The pressure reduction of the surface and the stop of the pressure reduction are alternately performed.

  When the first zone and the second zone are defined in the circumferential direction of the rotating shaft, preferably, the pressure reducing mechanism (9, 11, 12, 15) is the first zone of the plurality of buckets (5). The opposite surface of the filter (6) provided in the bucket located in the position is decompressed, and the opposite of the filter (6) provided in the bucket located in the second zone among the plurality of buckets (5). The surface is configured not to be depressurized.

  In one embodiment, the rotor (1) further supports the bucket (5) and has a hollow water absorption box (4) provided with the opening, and the water absorption for each of the bucket (5). A water absorption pipe (7) provided to connect to the opening inside the box (5), and the pressure reducing mechanism (9, 11, 12, 15) is provided to slide on the water absorption pipe. And a pump (11) for depressurizing the inside of the water absorption box (4). In this case, the slide valve (13) includes the inside of the water absorption pipe (7) provided for the bucket located in the first zone among the plurality of buckets (5) and the water absorption box (4). A space inside the water absorption pipe (7) provided for the bucket located in the second zone among the plurality of buckets (5), having a through hole (15) for communicating the inside, It is preferable to be configured to be separated from the space inside the water absorption box (4).

  Preferably, the dehydrator further includes compressed air supply means for supplying compressed air to the water absorption pipe (7) provided for the bucket located in the second zone among the plurality of buckets (5). It is preferable to comprise (16, 17). In one embodiment, the slide valve (13) is a compressed air passage (18) communicating with the water absorption pipe (7) provided for a bucket located in the second zone among the plurality of buckets (5). The compressed air supply means (16, 17) includes a backwash pipe (16) communicating with the compressed air passage (18), the backwash pipe (16), and the compressed air passage (18). And an air compressor (17) for supplying the compressed air to the opposite surface of the filter (6) via the water absorption pipe (7).

  In addition, it is preferable that the dehydrating device further includes a cleaning nozzle (19) for injecting cleaning water to a bucket located in the second zone among the plurality of buckets.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which improves the throughput of the spin-drying | dehydration apparatus dehydrated by attracting | sucking the liquid component contained in a process target object is provided.

  FIG. 1 is a cross-sectional view showing a configuration of a dehydrating apparatus 10 according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a part of the dehydrating apparatus 10. The dehydrating apparatus 10 is configured to suck the liquid component from the processing object W in which the solid and the liquid component are mixed. Examples of the processing object W include a mixture of sand and liquid generated in the treatment of human waste and sludge. As described above, suction is an effective technique for separating liquid from a mixture of sand and liquid. Hereinafter, the configuration of the dehydrating apparatus 10 will be described in detail.

  Referring to FIG. 1, a dehydrating apparatus 10 includes a rotor 1 that is rotatably provided around a rotation shaft 1a. The rotor 1 is joined to the drive device 3 via the shaft 2 and is rotated around the rotation shaft 1 a by the drive device 3. The rotating shaft 1a is preferably oriented in the horizontal direction (direction perpendicular to the direction of gravity). In the following description, “axial direction”, “radial direction”, and “circumferential direction” are defined with reference to the rotating shaft 1a. That is, the axial direction is a direction parallel to the rotating shaft 1a, the radial direction is a direction perpendicular to the rotating shaft 1a, and the circumferential direction is a direction defined so as to go around the rotating shaft 1a. is there.

  3 is a cross-sectional view showing a configuration of the rotor 1 in a vertical cross section including the rotating shaft 1a, and FIG. 4 is a cross-sectional view showing a structure of the rotor 1 in a II-II 'cross section in FIG. As shown in FIG. 3, the rotor 1 includes a hollow water absorption box 4 and a bucket 5. The bucket 5 is for accommodating the processing object W, and is joined to the side surface 4 a of the water absorption box 4. As illustrated in FIG. 4, the buckets 5 are arranged side by side in the circumferential direction, and in the present embodiment, six buckets 5 are provided. Returning to FIG. 3, an opening is provided in the side surface 4 a of the water absorption box 4 so as to communicate with the bucket 5, and a filter 6 is provided in the opening. The filter 6 is in contact with the processing object W on its outer surface.

  A suction pipe 7 is joined to the opening to which the filter 6 is attached. The suction pipe 7 is provided so as to extend in the radial direction from the opening to which the filter 6 is attached toward the rotating shaft 1a, and further bend and extend in the axial direction. As will be described later, the suction tube 7 is used for reducing the pressure on the inner surface of the filter 6 (the surface opposite to the surface in contact with the processing object W) and sucking liquid from the processing object W. The

  As shown in FIG. 4, the space around the rotor 1 is defined by three zones: an introduction zone, a dewatering zone, and a discharge zone. The introduction zone is a zone for introducing the processing object W into the bucket 5, and the dehydration zone is a zone for dehydrating the processing object W accommodated in the bucket 5 by liquid suction. The discharge zone is a zone for discharging the dehydrated processing object W ′ from the bucket 5.

  With reference to FIG. 1, the water absorption box 4 of the rotor 1 is provided with a bearing 8, and the water absorption box 4 is rotatably supported by the fixed drain shaft 9 by the bearing 8. The fixed drain shaft 9 is a hollow tube. One end of the fixed drain shaft 9 is inserted into the water absorption box 4, and the other end is connected to the drain pump 11. The fixed drain shaft 9 is provided with a drain port 12 that opens inside the water absorption box 4. The space inside the water absorption box 4 communicates with the drainage pump 11 from the drainage port 12 through the fixed drainage shaft 9, and the inside of the water absorption box 4 is decompressed by the drainage pump 11.

  With reference to FIG. 2, a disc-shaped slide valve 13 is provided at the end of the fixed drain shaft 9 inserted into the water absorption box 4. The slide valve 13 can be rubbed along the fixed drain shaft 9 (that is, in the axial direction), but is attached to the fixed drain shaft 9 so as not to rotate around the rotary shaft 1a. Further, the slide valve 13 is urged toward the suction pipe 7 by a spring 14. When the rotor 1 rotates, the suction pipe 7 of the rotor 1 is rubbed while being in contact with the slide valve 13.

  FIG. 5 is a diagram illustrating an example of the structure of the slide valve 13 viewed from the axial direction. The slide valve 13 is provided with a through hole 15. The through hole 15 is formed at a position corresponding to the position of the suction pipe 7, and the through hole 15 serves to communicate the space inside the suction pipe 7 and the space inside the water absorption box 4. The through hole 15 of the slide valve 13 is provided in such an arrangement that when a certain bucket 5 is located in the introduction zone or the dewatering zone, the suction pipe 7 connected to the bucket 5 and at least one of the through holes 15 overlap. It has been. When the bucket 5 is located in the dewatering zone, the suction pipe 7 connected to the bucket 5 does not overlap any of the through holes 15. Such an arrangement can be easily realized by appropriately adjusting the positions and diameters of the suction tube 7 and the through hole 15. In the example of FIG. 5, a plurality of through holes 15 are provided in a portion of the slide valve 13 corresponding to the introduction zone or the dehydration zone.

  Returning to FIG. 1, when the suction pipe 7 moves as the rotor 1 rotates and a certain suction pipe 7 overlaps the through hole 15, the space inside the suction pipe 7 communicates with the space inside the water absorption box 4. . Since the inside of the water absorption box 4 is depressurized by the fixed drain shaft 9 and the drain pump 11 as described above, when a certain suction pipe 7 overlaps the through hole 15, the space inside the suction pipe 7, that is, the The inner surface of the filter 6 corresponding to the suction pipe 7 is decompressed. In such a configuration, the fixed drain shaft 9, the drain pump 11, and the slide valve 13 function as a decompression mechanism that decompresses the space inside the suction pipe 7, that is, the inner surface of the filter 6.

  In FIG. 5, a configuration in which a plurality of circular through holes 15 are provided in portions corresponding to the introduction zone and the dehydration zone of the slide valve 13 is illustrated, but the shape, number, and arrangement of the through holes 15 are as follows. Those skilled in the art will readily understand that such changes can be made as appropriate. For example, as shown in FIG. 6, a single through hole 15 extending in the circumferential direction may be provided in a portion corresponding to the introduction zone and the dewatering zone of the slide valve 13. However, a configuration in which a plurality of circular through holes 15 are provided is preferable in terms of easy manufacture.

  The dehydrating apparatus 10 having such a configuration performs the dehydrating operation of the processing object W by the following operation. With reference to FIG. 4, when a bucket 5 enters the introduction zone by the rotation of the rotor 1, the processing object W is introduced into the bucket 5. The processing object W is introduced into the bucket 5 so as to cover the filter 6. When the rotor 1 further rotates, the suction pipe 7 connected to the bucket 5 starts to overlap the through hole 15, and the space inside the suction pipe 7, that is, the surface where the processing object W of the filter 6 is not in contact passes. It communicates with the space inside the water absorption box 4 through the hole 15. As described above, since the space inside the water absorption box 4 is depressurized by the drainage pump 11, as a result, the inner surface of the filter 6 is depressurized. Thereby, the liquid component is sucked from the processing object W, and the processing object W is dehydrated. The dehydration of the processing object W is continued until the bucket 5 moves from the introduction zone to the dehydration zone by the rotation of the rotor 1 and further enters the discharge zone.

  When the bucket 5 enters the discharge zone, the dehydrated processing object W ′ is discharged from the bucket 5 by natural fall due to gravity. At this time, the inner surface of the filter 6 is not decompressed, and the processing object W ′ is not sucked into the filter 6. That is, when the bucket 5 enters the discharge zone, the suction pipe 7 does not overlap the through hole 15, and the suction pipe 7 is blocked from the space inside the water absorption box 4 by the slide valve 13. Accordingly, the inside of the suction pipe 7, that is, the inner surface of the filter 6 is not decompressed. Stopping the decompression of the inner surface of the filter 6 is preferable in terms of facilitating the discharge of the processing object W.

  Hereinafter, by the same process, when the bucket 5 is located in the introduction zone and the dewatering zone, the processing object W inside the bucket 5 is dehydrated by liquid suction, and when the bucket 5 reaches the discharge zone, the dewatered processing object W ′ is formed. Discharged. As described above, in the dehydrating apparatus 10, the pressure reduction of the inner surface of each filter 6 and the stop of the pressure reduction are alternately performed for each bucket 5, so that the processing object W is dehydrated and dehydrated. Is continuously discharged.

  As described above, in the dehydrating apparatus 10 of the present embodiment, the liquid suction and discharge with respect to the processing target W are sequentially performed as the rotor 1 rotates. That is, the dehydrating apparatus 10 of the present embodiment can continuously suck liquid with respect to the processing object W. Therefore, the dehydrating apparatus 10 can achieve a high throughput.

  A problem in operating the dehydrating apparatus 10 is that the fluidity becomes poor when the processing object W is dehydrated. When the fluidity of the processing object W becomes poor, it becomes difficult for the processing object W to naturally fall from the bucket 5. This is not preferable in the operation of the dehydrator 10. FIG. 7 shows a configuration for dealing with such a problem.

  FIG. 7 is a cross-sectional view showing a configuration of the dehydrating apparatus 10 for coping with such a problem. In the configuration of FIG. 7, the backwash pipe 16 and the air compressor 17 are provided, and the compressed air passage 18 penetrating the slide valve 13 is provided. One end of the backwash pipe 16 is connected to the compressed air passage 18 through the inside of the fixed drain shaft 9, and the other end is connected to the air compressor 17. One end of the compressed air passage 18 of the slide valve 13 is opened so as to communicate with the backwash pipe 16, and the other end is opened at a position corresponding to the suction pipe 7 in a portion corresponding to the discharge zone of the slide valve 13. is doing. The air compressor 17 generates compressed air and supplies it to the compressed air passage 18 via the backwash pipe 16.

  The configuration of FIG. 7 described above facilitates that the dehydrated processing object W ′ is discharged from the bucket 5 when the bucket 5 enters the discharge zone. According to the configuration of FIG. 7, when the bucket 5 enters the discharge zone, the dehydrated processing object W ′ easily falls naturally due to gravity due to the action of the compressed air supplied from the air compressor 17. That is, when the bucket 5 enters the discharge zone, compressed air is supplied to the suction pipe 7 of the bucket 5 through the backwash pipe 16 and the compressed air passage 18. As a result, the inner surface of the filter 6 becomes positive pressure, and the dehydrated processing object W ′ is likely to fall naturally.

  In addition, the configuration of FIG. 7 also has an effect of suppressing clogging of the filter 6. When the liquid suction is performed, the processing object W enters the filter 6 and the filter 6 may be clogged. This is not preferable because it reduces the dehydration efficiency. However, according to the configuration of FIG. 7, when the bucket 5 enters the discharge zone, the inner surface of the filter 6 becomes positive pressure, and the processing object W that has entered the filter 6 is easily detached from the filter 6. As described above, according to the configuration of FIG. 7, the filter 6 is washed with the compressed air supplied from the air compressor 17, and clogging of the filter 6 is suppressed.

  In order to suppress clogging of the filter 6, it is also preferable to provide a cleaning nozzle 19 and a drain receiver 20 in the drain zone as shown in FIG. The cleaning nozzle 19 sprays cleaning water onto the bucket 5 continuously or intermittently, thereby removing the processing object W remaining on the filter 6. The washing water used for washing the filter 6 is discharged from the bucket 5 to the drain receiver 20 so as not to be mixed into the newly supplied processing object W. According to such a configuration, clogging of the filter 6 can be effectively suppressed.

FIG. 1 is a cross-sectional view showing a configuration of a dehydrating apparatus according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing the configuration of the dehydrating apparatus of FIG. FIG. 3 is a cross-sectional view showing the configuration of the rotor of the dehydrating apparatus of FIG. FIG. 4 is a cross-sectional view showing the configuration of the rotor of the dehydrating apparatus of FIG. FIG. 5 is a cross-sectional view showing an example of the configuration of the slide valve of the dehydrating apparatus of FIG. FIG. 6 is a cross-sectional view showing another example of the configuration of the slide valve of the dehydrating apparatus of FIG. FIG. 7 is a cross-sectional view showing a configuration of a dehydrating apparatus according to another embodiment of the present invention. FIG. 8 is a cross-sectional view showing a configuration of a dehydrating apparatus according to still another embodiment of the present invention.

Explanation of symbols

10: Dehydrating device 1: Rotor 2: Shaft 3: Drive device 4: Water absorption box 5: Bucket 6: Filter 7: Suction pipe 8: Bearing 9: Fixed drain shaft 11: Drain pump 12: Drain port 13: Slide valve 14: Spring 15: Through hole 16: Backwash pipe 17: Air compressor 18: Compressed air passage 19: Cleaning nozzle 20: Drainage receiver

Claims (6)

A rotor provided rotatably,
A pressure reducing mechanism,
The rotor is
A plurality of buckets arranged in a circumferential direction with respect to the rotation axis of the rotor to receive processing objects;
A filter provided in an opening that communicates with the inside of the plurality of buckets,
The pressure reducing mechanism is configured to alternately perform pressure reduction on the opposite surface of the filter opposite to the contact surface that is in contact with the object to be processed and stop the pressure reduction in synchronization with rotation of the rotor. Dehydration device. The dehydration apparatus according to claim 1 comprises:
When the first zone and the second zone are defined in the circumferential direction of the rotation axis,
The decompression mechanism decompresses the opposite surface of the filter provided in a bucket located in the first zone among the plurality of buckets, and is provided in a bucket located in the second zone among the plurality of buckets. The dewatering device is configured such that the opposite surface of the filter is not decompressed. The dehydrator according to claim 2,
The rotor is
A hollow water absorption box supporting the bucket and provided with the opening;
A water absorption pipe provided to connect to the opening inside the water absorption box for each of the buckets;
The decompression mechanism is
A slide valve provided to slide on the water absorption pipe;
A pump for decompressing the inside of the water absorption box,
The slide valve has a through hole that communicates the inside of the water absorption pipe and the inside of the water absorption box provided to the bucket located in the first zone among the plurality of buckets, and the plurality of the plurality of buckets A dehydrating apparatus configured to separate a space inside the water absorption pipe provided for a bucket located in the second zone of the bucket from a space inside the water absorption box. The dehydrator according to claim 3,
Furthermore, a dehydrating apparatus comprising compressed air supply means for supplying compressed air to the water absorption pipe provided for a bucket located in the second zone among the plurality of buckets. The dehydrating apparatus according to claim 4,
The slide valve has a compressed air passage communicating with the water absorption pipe provided for a bucket located in the second zone among the plurality of buckets,
The compressed air supply means includes
A backwash pipe communicating with the compressed air passage;
A dehydrator comprising: an air compressor that supplies the compressed air to the opposite surface of the filter through the backwash pipe, the compressed air passage, and the water absorption pipe. A dehydrator according to any one of claims 2 to 5,
The dehydrator further includes a cleaning nozzle that injects cleaning water to a bucket located in the second zone among the plurality of buckets.

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