JP2012045498A - Concentrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a concentration factor for a treatment target material which contains a liquid and is fed together with a flocculant, to a treatment vessel.SOLUTION: A concentrator includes a draining member which is arranged in the concentration section of a treatment vessel and drains the treatment target material through rotation by rotation driving of the rotary shaft of the concentration section, which is arranged in the axial direction of the treatment vessel, and a stirring blade which is arranged in a flocculation section and rotates by rotation driving of the rotary shaft of the flocculation section arranged concentrically with the rotary shaft of the concentration section. The draining member and the stirring blade are rotated at different speeds by making the rotational seed of the rotary shaft of the concentrating section different from that of the rotary shaft of the flocculation section.

Description

  The present invention relates to a concentrating device for concentrating a processing object including a liquid supplied into a processing tank together with a flocculant.

  Conventionally, a cylindrical processing tank, an agglomeration part provided at the lower part of the processing tank and provided with a stirring blade for aggregating the processing object and the flocculant to agglomerate the processing object, and above the aggregation part in the processing tank And a concentrating device having a concentrating unit provided with a screen for filtering the object to be processed (see, for example, Patent Document 1 and Patent Document 2).

  Such a conventional concentrating apparatus is configured such that when a processing object such as filth including liquid with a flocculant is supplied from the bottom of the processing tank to the inside of the processing tank, the processing object is formed in the aggregation part by the rotation of the stirring blade. And the flocculant are agitated to cause the treatment target to agglomerate. In the concentrating unit, the concentrating unit slides a scraper or a blade against the screen to prevent clogging of the screen, and the liquid contained in the agglomerated processing object is passed through the screen to the outside of the processing tank. The solution is concentrated by passing through a filter.

  Thereafter, the concentrating device discharges the concentrated processing object from the outlet, and the processing object concentrated by the concentrating device is further dehydrated by the dehydrating device, so that a desired moisture content is obtained. It is supposed to be a processing object.

Japanese Utility Model Publication No. 6-39786 Japanese Patent No. 3570293

  Here, when the processing object concentrated by the dehydrating apparatus is dehydrated, the higher the concentration of the processing object, the higher the dehydrating efficiency of the dehydrating apparatus. However, according to the conventional concentration apparatus as described above, there is a case where a processing object having a desired concentration cannot be obtained only by filtering the agglomerated processing object in the concentration unit. As a result, there has been a problem that the dewatering efficiency in the subsequent dewatering device is lowered.

  This invention is made | formed in view of these points, and it aims at providing the concentration apparatus which can improve the concentration rate of a process target object.

  In order to achieve the above object, the concentration device according to the first aspect of the present invention is characterized in that a processing tank to which a processing object including a liquid and a flocculant are supplied, a lower part of the processing tank, and the processing An agglomeration part having a stirring blade for aggregating the object to be treated by agitation of the object and the aggregating agent, and a liquid of the agglomerated object to be agglomerated provided above the agglomeration part in the treatment tank are filtered. In a concentrating apparatus comprising: a concentrating part for concentrating the object to be treated; and a discharge part provided above the concentrating part in the treatment tank and having a discharge port for discharging the concentrated object to be treated. The concentration portion is provided with a draining member that drains the liquid to be treated by allowing the liquid accumulated inside the agglomerated processing object to flow out of the processing object.

  According to the first aspect of the present invention, the liquid collected in the processing object is discharged to the outside of the processing object by the draining member, and the processing object conveyed to the concentrating unit is drained. Therefore, the liquid accumulated in the object to be processed can be filtered by filtering the liquid that has flowed out.

  According to a second aspect of the present invention, there is provided a concentration apparatus according to the first aspect of the present invention, wherein the draining member is rotated by a rotational drive of a concentrator rotating shaft disposed along the axial direction of the treatment tank. The stirring blade is rotated by a rotational drive of the aggregating part rotating shaft arranged coaxially with the concentrating part rotating shaft, and the rotational speeds of the concentrating part rotating shaft and the aggregating part rotating shaft are adjusted. The difference is that the draining member and the stirring blade are rotated at different speeds.

  As a result, a difference between the flow rate of the processing object in the aggregating part and the flow rate of the processing object in the concentrating part can be caused to further improve the draining effect of the processing object by the draining member. The concentration rate of the product can be further improved.

  According to a third aspect of the present invention, there is provided a concentration device according to the second aspect of the present invention, wherein the draining member is a first draining member, and the first draining member is attached to the concentrating portion rotating shaft, The blade surface has a first draining blade arranged to be inclined with respect to the axial direction of the concentrating portion rotation axis.

  Thereby, the 1st draining member stirs the processing target object of a concentration part with the 1st draining blade rotated by the rotation drive of a concentration part rotating shaft, and thereby the liquid collected inside the processing target object is processed. The object to be treated can be drained by flowing out to the outside, and the liquid accumulated inside the object to be treated can be filtered by filtering the liquid that has flowed out. Further, the first draining member can push the processing object upward by the rotation of the first draining blade and transport it to the discharge unit. Furthermore, since the first draining blade has a rotational speed different from that of the stirring blade, a difference between the flow rate of the processing object in the agglomeration part and the flow rate of the processing object in the concentrating part is caused. Can be improved.

  According to a fourth aspect of the present invention, there is provided a concentration apparatus according to the second or third aspect of the present invention, wherein the draining member is a second draining member, and the second draining member is the aggregating portion rotating shaft. A support portion attached to the support portion, a support shaft fixed to the support portion and extending from the support portion in the direction of the concentration portion, and a second draining blade attached to the support shaft, The two draining blades are at a point that is rotated by the rotational drive of the aggregating portion rotating shaft.

  As a result, the second draining member agitates the processing object of the concentrating unit by the second draining blade rotating by the rotation driving of the aggregating unit rotating shaft, so that the liquid accumulated inside the processing object is removed from the processing object. The object to be treated can be drained by flowing out to the outside, and the liquid accumulated inside the object to be treated can be filtered by filtering the liquid that has flowed out.

  A feature of the concentrating device according to the invention of claim 5 is that, in the invention of any one of claims 2 to 4, the draining member is a third draining member, and the third draining member is It is in the point provided with the support part fixed to the surrounding wall of the said discharge part, and the 3rd draining blade suspended from the said support part and arrange | positioned at the said concentration part.

  As a result, the third draining member generates a turbulent flow in the flow of the processing object by the third draining blades that are fixedly arranged, so that the liquid accumulated inside the processing object is removed from the outside of the processing object. The object to be treated can be drained by flowing in the direction, and the liquid accumulated inside the object to be treated can be filtered by filtering the liquid that has flowed out.

  According to a sixth aspect of the present invention, there is provided a concentration device according to the second aspect of the present invention, wherein the draining member is a fourth draining member, and the fourth draining member is attached to the rotating shaft of the concentrating unit. And a draining blade attached to the supporting portion and disposed along the axial direction of the concentrating unit rotation shaft, wherein the draining blade is rotated by a rotational drive of the concentrating unit rotating shaft. .

  Thereby, the 4th draining member stirs the process target object of a concentration part with the 1st draining blade rotated by the rotation drive of a concentration part rotating shaft, and thereby the liquid collected inside the process target object is processed. The object to be treated can be drained by flowing out to the outside, and the liquid accumulated inside the object to be treated can also be filtered by filtering the liquid that has flowed out. In addition, since the first draining blade has a rotational speed different from that of the stirring blade, a difference between the flow rate of the processing object in the agglomeration part and the flow rate of the processing object in the concentrating part causes a difference in the draining effect of the processing object. Can be improved.

  As described above, according to the concentrating device according to the present invention, the liquid accumulated inside the processing object can also be filtered, so that the concentration rate of the processing object can be improved.

The longitudinal cross-section front view which shows 1st Embodiment of the concentration apparatus which concerns on this invention 1 is a longitudinal sectional side view of a conceivable portion from the direction of arrow A of the concentrator shown in FIG. FIG. 1 is a cross-sectional plan view of a corresponding portion of the concentrator shown in FIG. Fig. 1 is a cross-sectional plan view of a corresponding portion of CC in the concentrator shown in Fig. 1. The longitudinal cross-section side view which shows 2nd Embodiment of the concentration part in the concentration apparatus which concerns on this invention The cross-sectional top view of the equivalent part in DD of the concentration part shown in FIG. The longitudinal cross-section front view which shows 3rd Embodiment of the concentration part in the concentration apparatus which concerns on this invention The cross-sectional top view of the equivalent part in EE of the concentration part shown in FIG. The longitudinal cross-section side view which shows 4th Embodiment of the concentration part in the concentration apparatus which concerns on this invention FIG. 9 is a cross-sectional plan view of a portion corresponding to FF of the concentration unit shown in FIG.

  Hereinafter, an embodiment of a concentrating device according to the present invention will be described with reference to FIGS. In addition, in this embodiment, although demonstrated using sludge as a processing target object concentrated with a concentration device, a processing target object concentrated with a concentration device concerning the present invention is not limited to sludge, sludge, food residue, Various processing objects such as waste liquid and screen residue are possible.

  FIG. 1 is a longitudinal sectional front view showing a first embodiment of a concentrating device according to the present invention, and FIG. 2 is a longitudinal sectional side view as viewed from an arrow A in the concentrating device of FIG.

  As shown in FIGS. 1 and 2, the concentrating device 1 according to the present embodiment has a treatment tank 2 having a cylindrical peripheral wall 3 and a bottom wall 5, and the bottom wall 5 includes a treatment tank 2. A sludge supply port 7 connected to a supply pipe 6 for supplying sludge is provided. Further, the supply pipe 6 is provided with a first flocculant supply port 8A through which a flocculant can be arbitrarily supplied. When the flocculant is supplied from the first flocculant supply port 8A, the concentrating device 1 is configured to supply the sludge together with the flocculant from the bottom of the treatment tank 2 through the supply port. Yes.

  The lower part of the treatment tank 2 is an aggregation part 2A for aggregating sludge, and a concentration part 2B for concentrating the aggregated sludge is provided above the aggregation part 2A in the treatment tank 2. Furthermore, a discharge unit 2C that discharges the concentrated sludge from the treatment tank 2 is provided above the concentration unit 2B.

  The aggregation portion 2 </ b> A in the treatment tank 2 is provided with an aggregation portion rotation shaft 10 along the axial direction S of the treatment tank 2. Further, the concentrating unit 2B is provided with a concentrating unit rotating shaft 11 coaxially with the aggregation unit rotating shaft 10, and the concentrating unit rotating shaft 11 extends to the discharge unit 2C. Both rotary shafts 10 and 11 are connected to one drive motor 13 via a plurality of gears 12, respectively, and can be rotated at different speeds. Thus, by driving both rotating shafts 10 and 11 with a single drive motor 13, the apparatus can be simplified and lightened. The rotary shafts 10 and 11 may be rotationally driven by different drive motors 13. Thereby, each rotating shaft 10 and 11 can be freely rotationally driven by appropriate rotation speed.

  A plurality of (three in this embodiment) flocculant supply ports 8B, 8C, and 8D that can arbitrarily supply the flocculant are provided in parallel along the axial direction S on the peripheral wall 3 of the flocculent portion 2A. ing. The concentrating device 1 has at least one type of coagulant in the treatment tank 2 from at least one coagulant supply port 8 among the first to fourth coagulant supply ports 8A, 8B, 8C, 8D (8). It comes to be supplied. The position of the flocculant supply port 8 for supplying the flocculant is selected in consideration of the number of flocculants to be supplied, the aggregation reaction time, and the like. In general, when one kind of flocculant is supplied, the flocculant is supplied from any one of the flocculant supply ports 8, and when two kinds of flocculants are supplied, the first flocculant is the first flocculant. The first coagulant supply port 8A is supplied, and the second coagulant is supplied from any one of the second coagulant supply port 8B, the third coagulant supply port 8C, or the fourth coagulant supply port 8D. It has become. Moreover, the concentration apparatus 1 which concerns on this embodiment can be adapted also when supplying the same coagulant | flocculant in multiple times.

  In addition, as the flocculant, various types are used depending on the type of the processing object. For example, when the processing object is excess sludge, an inorganic flocculant and a liquid polymer flocculant are used. In the case of inorganic agglomerated precipitated sludge, two liquids of a cationic polymer and an anionic polymer are used.

  The agglomeration part 2A is provided with a stirring blade 15 for agitating the sludge and the aggregating agent by being rotated by the rotational drive of the agglomeration part rotating shaft 10. As shown in FIG. 3, the stirring blade 15 is fixedly attached to the aggregation unit rotating shaft 10 so as to rotate around the aggregation unit rotating shaft 10, and the blade surface 15 a of the stirring blade 15 is fixed to the stirring blade 15. They are arranged so as to be orthogonal to the rotation direction C. In this embodiment, as shown in FIGS. 1 and 2, three stirring blades 15 are arranged in parallel in the axial direction S with a predetermined gap, and each stirring blade 15 is adjacent to the adjacent stirring blade. 15 is arranged so as to be orthogonal to the plane. And each stirring blade 15 is rotated by the rotational drive of the aggregation part rotating shaft 10 by the speed of 20-80 rpm in consideration of the kind of sludge etc., for example. In addition, the arrangement | positioning and number of the stirring blades 15 in this invention are not limited to this embodiment, In the present invention, the stirring blades 15 should just be provided so that a sludge and a flocculant can be stirred.

  A baffle plate 16 is fixed to the peripheral wall 3 of the aggregation portion 2A at a position corresponding to the gap between the positions of the stirring blades 15 in the axial direction S. The baffle plates 16 are stirred by the stirring blades 15. A turbulent flow is generated in the flow of the sludge and flocculant.

  As a result, the agglomeration unit 2A agitate the sludge and the aggregating agent supplied to the treatment tank 2 with the agitation blade 15 to agglomerate the sludge to form a floc. Further, the agglomeration part 2A can agitate the sludge and the flocculant more uniformly by causing the baffle plate 16 to generate a turbulent flow in the flow of the sludge and the flocculant, thereby uniformly aggregating the whole. Yes.

  The peripheral wall 3 of the concentration unit 2B in the treatment tank 2 is configured by a screen 18 made of a punching metal, a filter, or the like, and the concentration device 1 filters sludge liquid through the screen 18 in the concentration unit 2B. ing. Further, a cradle 19 for receiving the liquid filtered through the screen 18 is provided at the outer lower end portion of the screen 18 so as to protrude outside the processing tank 2. The cradle 19 is shown in FIG. As described above, a pair of discharge holes 20 for discharging the filtered liquid is formed. Further, the outer peripheral edge of the cradle 19 is connected to an outer wall 21 that is disposed to face the outer surface of the screen 18.

  The concentrating unit 2B is provided with a cleaning member 23 for preventing the screen 18 from being clogged. The cleaning member 23 is fixedly attached to the concentrating unit rotating shaft 11, and is supported by the supporting shaft 23a. And a support plate 23b disposed to face the inner surface of the screen 18, and a rubber plate 23c supported by the support plate 23b and in sliding contact with the inner surface of the screen 18. The cleaning member 23 removes sludge from the screen 18 by sliding the rubber plate 23c against the inner surface of the screen 18 while rotating by the rotational drive of the concentrating unit rotating shaft 11, thereby preventing the screen 18 from being clogged. In the present embodiment, the pair of cleaning members 23 are disposed to face each other with the concentration unit rotating shaft 11 interposed therebetween.

  Further, the concentration unit 2B is provided with a draining member 25 for draining the agglomerated processing object.

  In the present embodiment, the draining member 25 includes a first draining member 25A having a first draining blade 26 fixedly attached to the concentrating unit rotating shaft 11, and the first draining member 25A is rotated by the concentrating unit. A pair of first draining blades 26 arranged opposite to each other with the shaft 11 interposed therebetween are arranged in a set with a predetermined gap in the axial direction S, so that a total of four first draining blades 26 are provided. Each first draining blade 26 of the first draining member 25A is rotated by the rotational drive of the concentrating unit rotating shaft 11, and in this embodiment, the sludge is transported and the screen 18 is clogged. In consideration of the state and the like, the concentrator rotating shaft 11 is rotated by a rotational drive at a speed of 1 to several rpm. Thereby, the 1st draining blade 26 rotated by the rotational drive of the concentration part rotating shaft 11 and the stirring blade 15 rotated by the rotational drive of the aggregation part rotating shaft 10 rotate at different speeds. And the 1st draining member 25A stirs the sludge conveyed to the concentration part 2B by rotation of each 1st draining blade 26, and makes the liquid collected in the sludge flow out to the outside of the sludge. The sludge transported to the concentration unit 2B is drained.

  Further, as shown in FIG. 1, each first draining blade 26 has a blade surface 26a so that the upstream end edge in the rotation direction C of the concentrating portion rotating shaft 11 is located above the downstream end edge. Is arranged so as to be inclined with respect to the axial direction S of the concentrating portion rotating shaft 11. Then, the first draining member 25A is able to agitate the sludge conveyed to the concentrating unit 2B by the rotation of the first draining blades 26 and convey the sludge further upward.

  A discharge port 28 for discharging sludge from the inside of the treatment tank 2 is provided in the peripheral wall 3 of the discharge unit 2 </ b> C, and the discharge port 28 is connected to a discharge chute 29. Further, a scraping blade 27 that guides the sludge conveyed to the discharge unit 2C to the discharge port 28 is attached to a portion of the concentration unit rotating shaft 11 that extends to the discharge unit 2C. The scraping blade 27 is opposed to the peripheral wall 3 of the processing tank 2 at the tip thereof, the blade surface 27 a is arranged orthogonal to the rotation direction C of the concentration unit rotation shaft 11, and is rotated by the rotation drive of the concentration unit rotation shaft 11. The sludge transported to the discharge part 2C by scraping is scraped out and guided to the discharge port 28. The concentrator 1 discharges sludge from the discharge port 28 through the discharge chute 29 to the outside of the treatment tank 2, and the discharged sludge is illustrated as it is when it is subsequently dehydrated. It is designed to be supplied to a dehydrator.

  Next, the operation of this embodiment will be described.

  First, the concentrating device 1 supplies the sludge from the sludge supply port 7 to the treatment tank 2 via the supply pipe 6 and considers the aggregation reaction time and the like, and at least one of the coagulant supply ports 8. At least one type of flocculant is supplied through the supply port 8. Subsequently, the concentrating device 1 stirs the sludge and the flocculant supplied to the treatment tank 2 by rotating the aggregating unit rotating shaft 10 by driving the drive motor 13 and rotating each stirring blade 15. Agglomerate sludge. In addition, the concentrating device 1 agitates the sludge and the flocculant more uniformly by causing the turbulent flow in the sludge flow stirred by the baffle plates 16 in the coagulation section 2A, thereby coagulating the sludge evenly. Can be made.

  Subsequently, the concentrating device 1 rotates the concentrating portion rotating shaft 11 by driving the driving motor 13 and rotates the first draining blades 26 of the first draining member 25A, thereby stirring the sludge upward. The sludge liquid conveyed to the concentration unit 2B is filtered through the screen 18 while being conveyed so as to be pushed up. At this time, the concentrating device 1 stirs the sludge by the rotation of the first draining blades 26 and drains the sludge by causing the liquid accumulated in the sludge to flow out to the outside of the sludge. As a result, the concentrating device 1 allows the liquid accumulated in the sludge to flow out to the outside of the sludge and be filtered by the screen 18.

  Thus, the concentration apparatus 1 can also filter the liquid accumulated in the sludge by the screen 18 by draining the sludge with the first draining member 25A in the concentration unit 2B. The concentration rate can be improved.

  Further, the concentrating device 1 is configured so that the stirring blade 15 in the aggregation unit 2A and the first draining blade 26 in the concentrating unit 2B have different speeds (in this embodiment, the rotational speed of the first draining blade 26 is set to the rotation of the stirring blade 15 By rotating at a speed slower than the speed, a difference occurs between the sludge flow rate in the agglomeration part 2A and the sludge flow speed in the concentration part 2B, and the sludge drainage effect by the first draining blade 26 is further improved. Therefore, the concentration rate of sludge can be further improved. Further, by dropping the rotation in the concentration unit 2B, it is possible to prevent the aggregation flocs from being broken and to prevent the rubber from being worn.

  Further, the concentrating device 1 guides the sludge conveyed to the discharge unit 2C to the discharge port 28 by scraping the sludge by the scraping blade 27 that is rotated by the rotation drive of the concentration unit rotating shaft 11, and from the discharge port 28 to the treatment tank 2 Discharge to the outside.

  Thus, according to the present embodiment, the sludge transported to the concentration unit 2B is agitated by the rotation of the first draining blade 26, and the liquid accumulated in the sludge is caused to flow out to the outside of the sludge. Then, the sludge is drained, and the liquid that flows out of the sludge can be filtered through the screen 18.

  Therefore, since the concentration apparatus 1 can also filter the liquid accumulated in the sludge, the concentration rate of the sludge can be improved. According to the concentration apparatus 1 according to the present embodiment, the sludge having a sludge concentration of 0.5% can be concentrated to a sludge concentration of about 3.0%, and the sludge is concentrated at a concentration rate of about 17%. Can do. Moreover, according to the concentration apparatus 1 which concerns on this embodiment, the sludge with a sludge density | concentration of 1.5% can be concentrated to about 5.0%, and a sludge can be concentrated with the concentration rate of about 30%. it can. Thereby, the dewatering efficiency in the dewatering device when the sludge concentrated by the concentrating device 1 is dewatered by the dewatering device can be improved.

  Moreover, the concentration apparatus 1 improves the draining effect by the first draining member 25A by making the rotational speed of the first draining blade 26 in the concentrating part 2B different from the rotational speed of the stirring blade 15 in the aggregation part 2A. As a result, the concentration rate of sludge can be further improved.

  Next, a second embodiment of the concentration device 1 according to the present invention will be described with reference to FIGS.

  In addition, about the structure similar to 1st Embodiment, it demonstrates using the same code | symbol and abbreviate | omits detailed description.

  Also in the second embodiment of the present invention, as in the first embodiment, the aggregating unit rotating shaft 10 and the concentrating unit rotating shaft 11 are different from each other via the respective gears 12 by driving the drive motor 13. It is designed to rotate at speed.

  As shown in FIGS. 5 and 6, the concentrating unit 2 </ b> B in the concentrating device 1 according to the second embodiment has a support shaft 23 a of the cleaning member 23 as a draining member 25 that drains the agglomerated processing object. A first draining member 25A is provided above. The first draining member 25 </ b> A has a pair of first draining blades 26 fixedly attached to the concentrating unit rotating shaft 11, and both the first draining blades 26 are the same as the draining blades in the first embodiment. The concentrating unit rotating shaft 11 is disposed opposite to the concentrating unit rotating shaft 11 and is rotated by the rotational driving of the concentrating unit rotating shaft 11. And the 1st draining member 25A stirs the sludge conveyed to the concentration part 2B by rotation of the 1st draining blade 26, and makes the liquid accumulated in the sludge flow out to the outside of the sludge. It is designed to drain water.

  Further, below the first draining member 25A via the support shaft 23a of the cleaning member 23 in the concentration unit 2B, the rotation of the aggregation unit rotating shaft 10 is performed as another draining member 25 that drains the agglomerated processing object. A second draining member 25B that rotates by driving is provided.

  The second draining member 25B is fixed to the support portion 30 and a pair of support portions 30 attached to the aggregation portion rotation shaft 10 so as to be opposed to each other with the aggregation portion rotation shaft 10 interposed therebetween. To the concentrating portion 2B and extending along the axial direction S of the concentrating portion rotating shaft 11, and a pair of second draining blades attached to the supporting shaft 31 with a predetermined gap in the axial direction S As shown in FIG. 6, each second draining blade 32 is disposed such that the blade surface 32 a intersects the radial direction of the treatment tank 2 at a predetermined angle on the plane. . And the 2nd draining blade 32 rotates through the support part 30 and the spindle 31 by the rotational drive of the aggregation part rotating shaft 10, and, thereby, rotates at a different speed from the 1st draining blade 26. It is like that.

  Next, the operation of the second embodiment will be described.

  According to the concentration apparatus 1 according to the second embodiment, the second draining member 25B is conveyed from the aggregation unit 2A to the concentration unit 2B by the rotation of the second draining blade 32 by the rotational drive of the aggregation unit rotating shaft 10. The sludge can be drained by stirring the sludge and causing the liquid accumulated in the sludge to flow out to the outside of the sludge.

  The first draining member 25A further stirs the sludge stirred by the second draining blade 32 by the rotation of the first draining blade 26 by the rotation drive of the concentrating unit rotating shaft 11, and the liquid accumulated in the sludge. The sludge can be drained by causing the sludge to flow out to the outside of the sludge.

  Therefore, the concentrating device 1 according to the second embodiment allows the liquid accumulated in the sludge to flow out toward the outside of the sludge by stirring the sludge by the rotation of the first draining blade 26 and the second draining blade 32. Therefore, the sludge concentration rate can be improved.

  Furthermore, according to the concentrating device 1, the first draining blade 26 and the second draining blade 32 are rotated at different rotational speeds so that the sludge flow rate by the stirring of the first draining blade 26 and the second draining blade 32 A difference occurs in the flow rate of sludge by stirring, and the sludge draining effect by the draining blade can be further improved, so that the concentration rate of sludge can be further improved.

  Next, a third embodiment of the concentration apparatus 1 according to the present invention will be described with reference to FIGS.

  In addition, about the structure similar to 1st and 2nd embodiment, it demonstrates using the same code | symbol and abbreviate | omits detailed description.

  As shown in FIGS. 7 and 8, the concentrating unit 2B in the concentrating device 1 according to the third embodiment of the present invention supports the cleaning member 23 as a draining member 25 that drains the agglomerated processing object. A first draining member 25A is provided below the shaft 23a. The first draining member 25A has a pair of first draining blades 26 fixedly attached to the concentrating unit rotating shaft 11, and both the first draining blades 26 are similar to the draining blades in the first embodiment. The concentrating unit rotating shaft 11 is disposed opposite to the concentrating unit rotating shaft 11 and is rotated by the rotational driving of the concentrating unit rotating shaft 11. And the 1st draining member 25A stirs the sludge conveyed to the concentration part 2B by rotation of the 1st draining blade 26, and makes the liquid accumulated in the sludge flow out to the outside of the sludge. It is designed to drain water.

  Further, a further draining member 25 for draining the agglomerated processing object is disposed above the first draining member 25A via the support shaft 23a of the cleaning member 23 in the concentration unit 2B as the peripheral wall 3 of the discharge unit 2C. The 3rd draining member 25C fixed to is provided.

  25 C of 3rd draining members have the support part 35 fixed to the surrounding wall 3 of the discharge part 2C, and the 3rd draining blade 36 fixedly suspended from the support part 35, and arrange | positioned at the concentration part 2B. As shown in FIG. 8, the third draining blade 36 is disposed such that the blade surface 36 a intersects the radial direction of the treatment tank 2 with a predetermined angle on the plane. The third draining blade 36 generates a turbulent flow in the flow of the sludge pushed up while being agitated by the rotation of the first draining blade 26, and further causes the liquid accumulated in the sludge to move outward in the sludge. By draining, the sludge is drained.

  Next, the operation of the third embodiment will be described.

  According to the concentrating device 1 according to the third embodiment, the first draining member 25A is conveyed from the aggregation unit 2A to the concentrating unit 2B by the rotation of the second draining blade 32 by the rotational drive of the concentrating unit rotating shaft 11. The sludge can be drained by stirring the sludge and causing the liquid accumulated in the sludge to flow out to the outside of the sludge.

  Further, the third draining blade 36 is fixedly attached to the peripheral wall 3 of the discharge portion 2C via the support portion 35, and turbulently flows in the flow of sludge stirred and pushed up by the first draining blade 26. The sludge can be drained by causing the liquid accumulated in the sludge to flow out to the outside of the sludge.

  Therefore, the concentrating device 1 according to the third embodiment accumulates in the sludge by stirring the sludge by the rotation of the first draining blade 26 and generating a turbulent flow in the sludge flow by the third draining blade 36. The liquid can also flow out to the outside of the sludge and be filtered, so that the concentration rate of sludge can be further improved.

  Next, a fourth embodiment of the concentration apparatus 1 according to the present invention will be described with reference to FIGS. 9 and 10.

  In addition, about the structure similar to 1st, 2nd and 3rd embodiment, it demonstrates using the same code | symbol and abbreviate | omits detailed description.

  Also in the fourth embodiment of the present invention, as in the first embodiment, the aggregating unit rotating shaft 10 and the concentrating unit rotating shaft 11 have different speeds through the gears 12 by driving the drive motor 13, respectively. It is designed to rotate at.

  As shown in FIGS. 9 and 10, the concentrating unit 2B in the concentrating device 1 according to the fourth embodiment of the present invention has a concentrating unit rotating shaft 11 as a draining member 25 for draining the agglomerated processing object. The 4th draining member 25D rotated by this rotational drive is provided.

  The fourth draining member 25D has a pair of support portions 38 attached to the upper portion of the concentration portion rotation shaft 11 in the concentration portion 2B so as to face each other with the concentration portion rotation shaft 11 interposed therebetween, and two support members 38 are suspended from each support portion 38. And four fourth draining blades 39 arranged along the axial direction S of the concentrating unit rotating shaft 11. In the fourth embodiment, each fourth draining blade 39 is a round bar-like shape. It is comprised by the member. Further, as shown in FIG. 10, each fourth draining blade 39 has a predetermined gap in the radial direction of the treatment tank 2, and both the fourth draining blades 39 attached to one support portion 38 are respectively connected to the other. It arrange | positions in the position which does not overlap with both the 4th draining blade 39 attached to the support part 38 on a rotation route. In addition, the shape of the 4th draining blade 39 is not limited to this embodiment, For example, you may comprise by a plate-shaped member. Each of the fourth draining blades 39 is rotated by the rotation drive of the concentrating unit rotating shaft 11.

  Next, the operation of the fourth embodiment will be described.

  According to the concentrating device 1 according to the fourth embodiment, the fourth draining member 25D is conveyed from the aggregation unit 2A to the concentrating unit 2B by the rotation of each fourth draining blade 39 by the rotational drive of the concentrating unit rotating shaft 11. The sludge can be drained by stirring the sludge and allowing the liquid accumulated in the sludge to flow out of the sludge.

  Therefore, the concentrating device 1 according to the fourth embodiment is capable of filtering out the liquid accumulated in the sludge by the sludge agitation caused by the rotation of the fourth draining blade 39, so that the sludge can flow out to the outside of the sludge and be filtered. The concentration rate of can be improved.

  Further, by arranging both the fourth draining blades 39 attached to one of the support portions 38 at positions where they do not overlap with the fourth draining blades 39 attached to the other supporting portion 38 on the rotation route, respectively. The sludge transported to 2B can be uniformly stirred, and the liquid accumulated in the sludge can be discharged more toward the outside of the sludge. Thereby, the concentration apparatus 1 which concerns on 4th Embodiment can further improve the concentration rate of sludge.

  The present invention is not limited to the above-described embodiments, and various modifications can be made as necessary.

  For example, the shape, arrangement position, arrangement direction, and the like of the draining blade in the present invention are not limited to the above-described embodiments, and the liquid accumulated in the sludge in the concentrating unit 2B flows out to the outside of the sludge. It is sufficient if the sludge can be drained.

  Further, in the second embodiment, the first draining member 25A and the second draining member 25B are combined in the concentrating part 2B in the third embodiment, and the first draining member 25 and the third draining member 25 are combined. However, the present invention is not limited to this, and each draining member 25 may be used alone or may be freely combined as long as sludge can be drained by each draining blade. For example, the second draining member 25B in the second embodiment is provided below the concentration unit 2B, and the third draining member 25C in the third embodiment is provided above the second draining member 25B in the concentration unit 2B. Also good.

DESCRIPTION OF SYMBOLS 1 Concentrator 2 Processing tank 2A Aggregation part 2B Concentration part 2C Discharge part 3 Perimeter wall 7 Sludge supply port 8A 1st flocculant supply port 8B 2nd flocculant supply port 8C 3rd flocculant supply port 8D 4th flocculant supply port 10 Aggregation part rotating shaft 11 Concentrating part rotating shaft 13 Drive motor 15 Stirring blade
15a blade surface 18 screen 25 draining member 25A first draining member 26 first draining blade 26a blade surface 28 outlet

Claims (6)

A processing tank to which a processing object containing liquid and a flocculant are supplied, and a stirring blade provided at a lower part of the processing tank, which stirs the processing object and the flocculant to aggregate the processing object. An aggregating part, a concentrating part that is provided above the aggregating part in the processing tank and that concentrates the processing object by filtering the liquid of the agglomerated processing object; and the concentrating part in the processing tank In a concentrating apparatus provided with a discharge unit provided above and having a discharge port for discharging the concentrated processing object,
A concentrating apparatus, wherein the concentrating unit is provided with a draining member for draining the processing object by allowing the liquid accumulated in the agglomerated processing object to flow out of the processing object. . The draining member is rotated by a rotational drive of a concentrating unit rotation shaft arranged along the axial direction of the treatment tank,
The stirring blade is adapted to rotate by a rotational drive of an aggregating part rotating shaft arranged coaxially with the concentrating part rotating shaft,
The concentration apparatus according to claim 1, wherein the draining member and the stirring blade are rotated at different speeds by changing the rotation speeds of the concentration section rotation shaft and the aggregation section rotation shaft. The draining member is a first draining member,
3. The first draining member is attached to the concentrating unit rotation shaft, and has a first draining blade disposed such that a blade surface is inclined with respect to an axial direction of the concentrating unit rotation shaft. The concentrating device described in 1. The draining member is a second draining member,
The second draining member is attached to the support shaft, the support portion attached to the rotation shaft of the aggregation portion, the support shaft fixed to the support portion and extending from the support portion toward the concentration portion, and the support shaft. The concentrating device according to claim 2, wherein the second draining blade is rotated by a rotational drive of the aggregating unit rotating shaft. The draining member is a third draining member,
The said 3rd draining member is provided with the support part fixed to the surrounding wall of the said discharge part, and the 3rd draining blade suspended from the said support part and arrange | positioned at the said concentration part. The concentration apparatus according to any one of claims 4 to 4. The draining member is a fourth draining member,
The fourth draining member includes a support part attached to the concentration part rotating shaft, and a fourth draining blade attached to the support part and arranged along the axial direction of the concentration part rotating shaft, The concentrating apparatus according to claim 2, wherein the four draining blades are rotated by a rotational drive of the concentrating unit rotating shaft.

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