JP2007130576A - Rotating drum adsorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple-structured, compact rotary drum adsorber which can concurrently perform adsorption treatment and desorption treatment in the same device, and enables continuous operation. <P>SOLUTION: The rotary drum adsorber 10 comprises a rotatably mounted rotary drum 1 having an adsorber layer 2 on the periphery, and having partition walls 11 at both ends, a raw water supply means 5 for supplying raw water A into the rotatry drum 1, a regenerant supply means 6 for supplying regenerant C to the adsorber layer 2 from the upper outside of the drum, a regenerant collection means 7 for collecting the regenerant having passed through the adsorber layer 2 in the drum, a washing water supply means 8 for supplying washing water D to the adsorber layer 2 from the upper outside of the drum, and a washing water collection means 9 for collecting the washing water having passed through the adsorber layer 2 in the drum. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an adsorption device that adsorbs and removes target pollutants from raw water such as industrial wastewater, household wastewater, eutrophied river water, lake water, and the like.

  Conventionally, as a technique for adsorbing and removing substances in wastewater using activated carbon or an ion exchange resin, an adsorption tower method in which a tank is filled with an adsorbent is generally used. However, the adsorbing tower method requires replacement of the adsorbent when the adsorbent layer breaks through, and there is a difficulty in continuous operation.

So far, a multistage adsorption tower apparatus has been proposed that includes a plurality of adsorption towers and enables continuous operation by alternately repeating adsorption treatment and desorption regeneration treatment in each adsorption tower (for example, Patent Document 1). reference). However, this multistage adsorption tower apparatus has a complicated structure and has a problem that it must be enlarged.
JP-A-9-38451

  The present invention was made in view of the above-mentioned difficulties in the conventional adsorption tower type adsorption apparatus, and can perform adsorption treatment and desorption treatment simultaneously in the same apparatus, It is a technical problem to provide a simple and compact rotary drum type adsorption device that can be operated continuously.

  In addition, another technical problem of the present invention is to provide a rotary drum type adsorption device capable of simultaneously performing different adsorption / desorption processes in the same apparatus, or a solid-liquid separation process as a pre-process of the adsorption / desorption process. There is to do.

The present invention is a hollow cylindrical body provided with an adsorbent layer on the periphery and provided with partition walls at both ends, and a rotating drum provided rotatably with a rotation axis coaxial with the cylindrical axis line,
Raw water supply means for supplying raw water to be adsorbed into the rotating drum;
A regenerating liquid supply means for supplying a regenerating liquid for desorbing adsorbate from the regenerating liquid nozzle disposed on the outer side of the rotating drum to the adsorbent layer at the top of the rotating drum;
A regenerating liquid recovery means for recovering the regenerating liquid that has passed through the adsorbent layer in the rotating drum;
Washing water for supplying washing water to the adsorbent layer from a washing water nozzle disposed on the outer side of the rotating drum at the upper part of the rotating drum and on the downstream side of the revolving liquid nozzle. Supply means;
Washing water collecting means for collecting the washing water that has passed through the adsorbent layer is provided in the rotating drum.

  In the present invention, another rotating drum type adsorbing device is provided adjacent to the same axis as the rotating shaft of the rotating drum, and the adsorbent layer of the other rotating drum type adsorbing device has other characteristics. Or it is made into the filter material.

  In the rotary drum type adsorption apparatus according to the present invention, the adsorption process, the desorption process, and the cleaning process can be performed in the same apparatus, so that it can be continuously operated while being simple and compact. In the case of the conventional adsorption tower system, raw water or regenerated liquid is supplied to the adsorbent layer packed in the adsorption tower to perform adsorption / desorption treatment, whereas in the case of the rotary drum type adsorption apparatus according to the present invention, adsorption is performed. An adsorbent layer is provided on the periphery of the rotating drum so that the adsorbent layer itself can be circulated, and adsorption processing, desorption processing, and cleaning processing can be performed in parallel at each position on the periphery of the rotating drum. Therefore, it is possible to provide a compact and simple continuous adsorption apparatus capable of continuous operation.

  Also, if another rotating drum type adsorbing device is provided adjacent to the same axis as the rotating shaft of the rotating drum, and the adsorbent layer of the other rotating drum type adsorbing device is used as another adsorbent layer or a filter medium, the same Different adsorption / desorption processes in the apparatus, or solid-liquid separation process as a pre-process of the adsorption / desorption process can be performed in parallel.

  Hereinafter, the rotary drum type adsorption device 10 of the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the rotary drum type adsorption device 10 mainly includes a rotary drum 1 having an adsorbent layer 2 on the periphery and raw water A that supplies raw water A to be adsorbed into the rotary drum 1. Supply means 5, regeneration liquid supply means 6 for supplying the regeneration liquid C for desorption to the adsorbent layer 2 of the rotating drum 1, and regeneration liquid recovery means 7 for recovering the regeneration liquid C that has passed through the adsorbent layer 2. And a cleaning water supply means 8 for supplying cleaning water D for cleaning to the adsorbent layer 2 of the rotary drum 1, and a cleaning water recovery means 9 for recovering the cleaning water D that has passed through the adsorbent layer 2. It is configured.

  The rotating drum 1 is configured in a substantially hollow cylindrical shape, and includes a plurality of adsorbent layers 2 that are divided into 16 divisions in a side-by-side manner on the circumference of the cylinder, and the raw water A does not pass through both ends of the cylinder. A disk-shaped partition wall 11 is provided. At the center of each partition wall 11, a hollow shaft 12 concentric with the cylindrical axis of the rotating drum 1 protrudes toward the side of the drum, through which the inner space of the rotating drum 1 and the outside of the drum are connected. Communicate. The hollow shaft 12 is rotatably supported by bearing means (not shown) and is connected to the prime mover 14 via the transmission belt 13. Thus, the rotary drum 1 is driven by the prime mover 14 and continuously rotates around a horizontal cylindrical axis.

  In the present embodiment, a treatment tank 3 is provided below the rotating drum 1 so as to surround the lower portion of the rotating drum 1. The treatment tank 3 temporarily stores treated water B obtained by adsorption treatment with the adsorbent layer 2 of the rotary drum 1. A treated water discharge pipe 31 for guiding the treated water B to the outside is connected to a predetermined height position on the side wall of the treated tank 3, and the treated water discharge pipe 31 makes the storage level of the treated water B constant. Can keep.

  The adsorbent layer 2 is configured to fill a net bag through which raw water A passes with a granular adsorbent and maintain a predetermined thickness, and is partitioned by a partition wall 11 and a partition plate 21 as shown in FIG. It is detachably fixed to the part. In the present embodiment, a porous iron oxyhydroxide catalyst that can adsorb phosphorus, nitrogen, fluorine, etc. as an adsorbent and can easily desorb these adsorbates by contacting with an alkaline solution is employed. Of course, the present invention is not limited to this, and other porous metal oxides, activated carbon, and the like can also be employed. Further, for example, an organic polymer porous body that can adsorb gold, copper, etc. and can desorb these adsorbates by contact with an acidic solution may be adopted. As described above, various adsorbents and ion exchange resins can be employed according to the adsorbate to be adsorbed and removed as long as the adsorbent can desorb the adsorbate by contact with the regenerating liquid.

  In the present embodiment, a plurality of guides 4 are provided on the outer periphery of the rotating drum 1. As shown in FIG. 3, the guide 4 according to the present embodiment includes an outer peripheral portion 111 of a pair of partition walls 11 provided in the rotary drum 1 and an outer portion 211 of a pair of adjacent partition plates 21. Each of the plurality of absorbent layers 2 partitioned by the plate 21 is disposed. By means of this guide 4, the regenerating liquid C supplied from the regenerating liquid supply means 6 or the cleaning water D supplied from the cleaning water supply means 8 can be reliably guided to the adsorbent layer 2 and brought into contact with the adsorbent layer 2. It becomes possible. In this embodiment, the guide 4 is configured integrally with the partition wall 11 and the partition plate 21 in this way to simplify the configuration. However, a guide plate separate from the partition wall 11 and the partition plate 21 is used. You may comprise a guide by arrange | positioning. Further, it is not always necessary to provide a guide in accordance with the position of each absorbent layer 2.

  Furthermore, in the present embodiment, the inner portion 212 of the partition plate 21 is protruded from the adsorbent layer 2 toward the axis of the rotating drum 1 on the inner periphery of the rotating drum 1. As a result, the regenerated liquid C or the cleaning water D that has passed through the adsorbent layer 2 can be guided to the regenerating liquid recovery means 7 or the cleaning water recovery means 9, respectively, and reliably recovered.

  As shown in FIGS. 1 and 2, the raw water supply means 5 includes a raw water supply pipe 51 inserted into the hollow shaft 12 of the rotary drum 1 and a raw water pump (not shown) connected to the raw water supply pipe 51. It is configured. The opening at the front end of the raw water supply pipe 51 faces the inner space of the rotating drum 1, and the rear end side is connected to the raw water pump outside the rotating drum 1. By driving the raw water pump, the raw water A can be continuously supplied into the rotary drum 1.

  The regenerating liquid supply means 6 is connected to the regenerating liquid nozzle 61 disposed outside the upper portion of the rotary drum 1, a regenerating liquid supply pipe 62 connected to the regenerating liquid nozzle 61, and the regenerating liquid supply pipe 62. And a regenerative liquid pump (not shown). By driving the regeneration liquid pump, the regeneration liquid C can be sprayed from the regeneration liquid nozzle 61 to the adsorbent layer 2 through the regeneration liquid supply pipe 62.

  The regenerating liquid recovery means 7 is connected to a regenerating liquid hopper 71 disposed in the rotating drum 1 and a regenerating liquid discharge pipe 72 that is connected to the lower portion of the regenerating liquid hopper 71 and is inserted into the hollow shaft 12 of the rotating drum 1. And is composed of. The regenerating liquid C supplied by the regenerating liquid supplying means 6 and falling through the adsorbent layer 2 is received by the regenerating liquid hopper 71 and guided to the outside of the rotating drum 1 through the regenerating liquid discharge pipe 72. The regeneration liquid hopper 71 is supported at the tip of a regeneration liquid discharge pipe 72 fixed outside the drum, so that the regeneration liquid hopper 71 does not rotate in the inner space of the rotating drum 1 that rotates continuously. The position is fixed. In the present embodiment, as shown in FIG. 3, the regenerant liquid hopper 71 is disposed with its opening tip close to the inner portion 212 of the partition plate 21 and falls from the adsorbent layer 2. The regenerating liquid C can be reliably received by the regenerating liquid hopper 71.

  As shown in FIGS. 1 and 2, the washing water supply means 8 is located outside the upper part of the rotating drum 1 and on the downstream side of the regenerating liquid nozzle 61 of the regenerating liquid supplying means 6 in the rotating direction of the rotating drum 1. The cleaning water nozzle 81 is provided, a cleaning water supply pipe 82 connected to the cleaning water nozzle 81, and a cleaning water pump (not shown) connected to the cleaning water supply pipe 82. By driving the cleaning water pump, the cleaning water D can be sprayed from the cleaning water nozzle 81 to the adsorbent layer 2 through the cleaning water supply pipe 82.

  The washing water recovery means 9 is connected to a washing water hopper 91 disposed in the rotating drum 1 and a washing water discharge pipe 92 that is connected to the lower portion of the washing water hopper 91 and is inserted into the hollow shaft 12 of the rotating drum 1. And is composed of. The washing liquid D supplied by the washing water supply means 8 and passing through the adsorbent layer 2 is received by the washing water hopper 91 and guided to the outside of the rotating drum 1 through the washing water discharge pipe 92. The washing water hopper 91 is supported at the tip of a washing water discharge pipe 92 fixed outside the drum, so that the washing water hopper 91 also rotates in the inner space of the rotating drum 1 that rotates continuously. The position is fixed without. The washing water hopper 91 is also disposed with its opening tip approaching the inner portion 212 of the partition plate 21, and the washing water hopper 91 reliably receives the washing water D falling from the adsorbent layer 2. be able to.

  Below, the adsorption | suction process of the raw | natural water A by the rotating drum type adsorption | suction apparatus 10 of this embodiment is demonstrated.

  First, raw water A is continuously supplied into the rotary drum 1 by the raw water supply means 5 while continuously rotating the rotary drum 1 in one direction. The raw water A supplied into the drum temporarily accumulates in the lower part of the rotating drum 1 and adsorbent according to the level difference H between the water surface level of the raw water A and the storage level of the treated water B as shown in FIG. It moves from the inside of the rotating drum 1 to the outside through the layer 2. Thus, in the process where the raw water A passes through the adsorbent layer 2 in the lower part of the rotating drum 1, the adsorbate in the raw water A is adsorbed by the adsorbent layer 2 and the adsorbate is removed from the raw water A. The treated water B obtained by removing the adsorbate is temporarily stored in the treatment tank 3 and guided to the outside through the treated water discharge pipe 31.

  Next, the adsorbate is desorbed from the adsorbent layer 2 by the regenerating liquid C in the process in which the regenerating liquid C supplied by the regenerating liquid supply means 6 passes through the adsorbent layer 2 at the upper part of the rotating drum 1. The quality is recovered together with the regenerated liquid C by the regenerated liquid recovery means 7. That is, the adsorbent layer 2 that has adsorbed adsorbate at the lower part of the drum moves to the upper part of the drum by the continuous rotational movement of the rotary drum 1, and the regenerating liquid C continuously sprayed from the regenerating liquid nozzle 61 of the regenerating liquid supplying means 6. Contact. Thus, the adsorbate is desorbed from the adsorbent layer 2 by the regenerated liquid C in the process in which the regenerated liquid C supplied at the upper part of the rotating drum 1 passes through the adsorbent layer 2. The adsorbate desorbed from the adsorbent layer 2 passes through the adsorbent layer 2 together with the regenerating liquid C, falls into the drum, and is recovered by the regenerating liquid recovery means 7. In the present embodiment, porous iron oxyhydroxide capable of adsorbing phosphorus, nitrogen, fluorine, etc. is used as the adsorbent, so an alkaline solution is used as the regenerating liquid C for desorbing and regenerating the adsorbent layer 2. Can be used. When an organic polymer porous body capable of adsorbing gold, copper or the like is used as the adsorbent, an acidic solution can be used as the regenerating solution.

  Next, in the process in which the cleaning water D supplied by the cleaning water supply means 8 passes through the adsorbent layer 2 at the upper part of the rotating drum 1, the regeneration liquid C is washed out from the adsorbent layer 2 by the cleaning water D, C is recovered together with the cleaning water D by the cleaning water recovery means 9. That is, the adsorbent layer 2 that has been subjected to the desorption process further moves on the drum upper part by the continuous rotational movement of the rotary drum 1 and comes into contact with the cleaning water D that is continuously sprayed from the cleaning water nozzle 81 of the cleaning water supply means 8. In the process in which the washing water D supplied at the upper part of the rotating drum 1 passes through the adsorbent layer 2, the regeneration liquid C is washed out from the adsorbent layer 2 by the washing water D. The regenerated liquid C washed off from the adsorbent layer 2 passes through the adsorbent layer 2 together with the washing water D, falls into the drum, and is collected by the washing water collecting means 9. As the cleaning water D, the above-described treated water B can be used.

  The adsorbent layer 2 regenerated by the regenerating liquid C and then cleaned by the cleaning water D moves to the lower part of the drum by the continuous rotation of the rotating drum 1 and comes into contact with the raw water A again to perform the adsorbing process.

  As described above, in the rotating drum type adsorption device 10 of the present embodiment, the adsorption process, the desorption process, and the cleaning process can be performed in the same apparatus. Can do. In the case of the conventional adsorption tower system, raw water or regenerated liquid is supplied to the adsorbent layer packed in the adsorption tower to perform adsorption / desorption treatment, whereas in the case of the rotating drum type adsorption apparatus of this embodiment, adsorption is performed. By providing the adsorbent layer on the circumference of the rotating drum 1, the adsorbent layer itself can be circulated and moved, and at each position on the circumference of the rotating drum, the adsorption process, the desorption process, and the cleaning process are performed simultaneously. Therefore, it is possible to provide a suction device capable of continuous operation with a simple configuration and a compact configuration.

  Further, in the rotating drum type adsorption device 10 of the present embodiment, since the guide 4 is provided on the outer periphery of the rotating drum 1, the regenerating liquid C supplied from the regenerating liquid nozzle 61 and the washing water nozzle 81 are used. The supplied sprayed washing water D is reliably prevented from entering the treated water B of the treatment tank 3 or the raw water A in the rotating drum 1 through the outer periphery of the rotating drum 1 or the partition wall 11. can do.

  That is, in order to perform the adsorption / desorption process continuously in the adsorbent layer 2 of the rotary drum 1, not only the regenerated liquid supply means 6 that supplies the regenerated liquid C to each adsorbent layer 2 but also the regenerated liquid C. It is necessary to provide cleaning water supply means 8 for supplying the cleaning water D to be washed away, and in order to secure a minimum desorption time in the adsorbent layer 2, a certain interval is provided with respect to the regenerating liquid supply means 6. Thus, the washing water supply means 8 must be provided on the downstream side of the rotation. Therefore, as long as the diameter of the rotating drum 1 is not increased so much, at least one of the regenerating liquid supply means 6 and the washing water supply means 8 must be arranged to face the inclined peripheral surface of the rotating drum 1. If the guide 4 is not provided, the regenerative liquid C and the like will travel on the inclined outer peripheral surface of the rotary drum 1 as the sufficient amount of the regenerant liquid C and the like is supplied to the adsorbent layer 2 to improve the processing capacity. There was a negative effect of flowing down and mixing into the treated water B of the treatment tank 3. In the present embodiment, by providing the guide 4 on the outer periphery of the rotating drum 1, the mixing of the regenerated liquid C into the treated water B and the raw water A is solved, and further the scattering at the time of supplying the regenerated liquid C is prevented. Yes. Moreover, in this embodiment, since this guide 4 is comprised integrally with the partition 11 and the partition plate 21 of the rotating drum 1, while simplifying a structure, the intensity | strength of the rotating drum 1 can be improved. .

  Furthermore, in the present embodiment, since the inner portion 212 of the partition plate 21 is protruded from the adsorbent layer 2, the regenerated liquid C or the like that has passed through the adsorbent layer 2 is mixed into the raw water A in the rotary drum 1. Can be prevented. Further, since the protruding inner portion 212 of the partition plate 21 actively agitates the raw water A below the drum by the rotational movement of the rotary drum 1, the raw water A and the adsorbent layer 2 can be brought into efficient contact with each other. And the adsorption processing efficiency can be improved.

  Furthermore, in the present embodiment, the front end of the regenerative liquid hopper 71 of the regenerative liquid recovery means 7 and the front end of the cleaning water hopper 81 of the cleaning water recovery means 8 are disposed close to the inner portion 212 of the partition plate 21. Therefore, it is possible to reliably recover the regenerated liquid C and the like that falls through the adsorbent layer 2, and this also prevents the regenerated liquid C and the like from being mixed into the raw water A.

  The rotary drum type suction device 10 of the present embodiment has been described above, but the present invention can be implemented in other forms.

  For example, another rotary drum type adsorption device is provided adjacent to and coaxially with the hollow shaft 12 that is the rotation axis of the rotary drum 1 of the rotary drum type adsorption device 10, and the adsorbent layer of the other rotary drum type adsorption device is provided. An adsorbent layer having other adsorption characteristics may be used. This makes it possible to perform different adsorption / desorption processes as a whole as a whole in parallel. In addition, since the rotating shafts of a plurality of rotating drums can be made common, if this common hollow shaft is rotationally driven by a single prime mover via a transmission belt or the like, the structure can be further simplified and made compact. Can save power energy.

  In addition, as shown in FIG. 4, another rotating drum type solid-liquid separation device 20 may be provided adjacent to the hollow shaft 12 that is the rotating shaft of the rotating drum 1 of the rotating drum type adsorption device 10 coaxially. A solid-liquid separation device 20 shown in FIG. 4 is a pretreatment for the adsorption treatment of the raw water A by the rotating drum type adsorption device 10, and removes suspended matters etc. from the waste water E. The solid-liquid separation device 20 performs the filtration treatment. The filtered water F is supplied to the rotary drum type adsorption device 10 as raw water A. This solid-liquid separation device 20 is provided with a filter medium 202 made of a general fabric or the like instead of the adsorbent layer 2 of the rotary drum 1 of the rotary drum type adsorption device 10, and the configuration of the rotary drum 201 is as follows. This is the same as that of the rotary drum type suction device 10. In FIG. 4, reference numeral 205 denotes a supply pipe of waste water supply means for supplying waste water E into the rotary drum 201, and reference numeral 208 denotes back washing that injects back washing water to the filter medium 202 from the outside of the drum at the upper part of the drum. A water supply means 209 is a discharge pipe of the backwash water recovery means for recovering the solid component detached from the filter medium 202 by the backwash water jet. In addition, as a rotary drum type solid-liquid separation device, for example, a conventionally known solid-liquid separation device described in Japanese Patent Publication No. 4-9081 and Japanese Patent Laid-Open No. 7-136418 can be applied.

  As a result, the entire apparatus can simultaneously perform solid-liquid separation processing as pretreatment for adsorption / desorption treatment, which is advantageous in terms of energy, site area, operability, and the like. Here, an example in which two rotating drums are adjacent to each other has been described. Of course, three or more rotating drums may be provided, and suspended matter removal, anion removal, cation removal, etc. are performed simultaneously in parallel by each of the rotation drums. You may make it process. The rotating drum type adsorption device according to the present invention has a very simple configuration and is compact, so that it can be easily combined with other wastewater treatment devices, and can be used for various purposes.

  The present invention can be carried out in a mode in which various improvements, modifications, and variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Any invention-specific matters may be replaced with other technologies within a range where the same action or effect occurs, and the invention-specific matters configured integrally may be constituted by a plurality of members. In addition, the invention specific items constituted by a plurality of members may be implemented in an integrated configuration.

It is a partially broken side view of the rotary drum type adsorption device according to the present invention. It is a schematic plan view of the apparatus. It is a partially broken enlarged side view of the rotating drum of the same apparatus. It is a schematic plan view of the other rotating drum type adsorption | suction apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotating drum type adsorption | suction apparatus 1 Rotating drum 11 Partition 111 The outer peripheral part 12 of a partition The hollow shaft (rotary shaft)
2 Adsorbent layer 202 Filter material 21 Partition plate 211 Outside part 212 of partition plate 3 Inside part of partition plate 3 Treatment tank 4 Guide 5 Raw water supply means 6 Regeneration liquid supply means 61 Regeneration liquid nozzle 7 Regeneration liquid recovery means 71 Regeneration liquid hopper 8 Wash water supply means 81 Wash water nozzle 9 Wash water recovery means 91 Wash water hopper A Raw water B Treated water C Reclaimed liquid D Wash water

Claims (2)

A hollow cylindrical body having an adsorbent layer on the periphery and partition walls at both ends, the rotating drum provided rotatably with a rotation axis coaxial with the cylindrical axis;
Raw water supply means for supplying raw water to be adsorbed into the rotating drum;
A regenerating liquid supply means for supplying a regenerating liquid for desorbing adsorbate from the regenerating liquid nozzle disposed on the outer side of the rotating drum to the adsorbent layer at the top of the rotating drum;
A regenerating liquid recovery means for recovering the regenerating liquid that has passed through the adsorbent layer in the rotating drum;
Washing water for supplying washing water to the adsorbent layer from a washing water nozzle disposed on the outer side of the rotating drum at the upper part of the rotating drum and on the downstream side of the revolving liquid nozzle. Supply means;
A rotary drum type adsorbing device comprising: cleaning water recovery means for recovering the cleaning water that has passed through the adsorbent layer in the rotary drum. Another rotating drum type adsorbing device is provided adjacent to and coaxially with the rotating shaft of the rotating drum, and the adsorbent layer of the other rotating drum type adsorbing device is an adsorbent layer or a filter medium having other characteristics. Item 2. The rotating drum type adsorption device according to Item 1.

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