JPH05317611A - Liquid treating device and liquid treating facility using the same - Google Patents

Abstract

PURPOSE:To obtain a small-sized liquid treating device excellent in treating efficiency by installing a inflow opening for dispersing and flowing liquid from the circumferential direction in the bottom part of a tank or in the vicinity of a cylinder, installing a means for taking out a solid material in the intermediate part of the tank, installing a means for breaking lumps in the cylinder and making the liquid flow out from the upper of part of the tank. CONSTITUTION:A inflow opening 1 for liquid contg. a solid material, etc., is installed in the central bottom part of a treating tank 10 or on the circumference in the vicinity of the bottom part and only the solid material out of the liquid contg. the solid material, etc., is coagulated in a filter layer 20. Since the solid material layer normally forms a good filter layer, bar projections are provided on the periphery of a rotating cylinder 5 and a means for pulling out the solid material from the tip of the projections by a siphon or a pump, etc., and a lump breaking device, such as that having plural bar projections on the periphery of the rotating cylinder 5 are provided. After that, supernatant is discharged from a discharge opening 3 in the upper part of the tank 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid processing apparatus, and more specifically, a liquid containing a solid matter, a suspension and a soluble substance is passed through a slow and uniform dispersion layer comprising the solid matter or the like. Liquid capable of reaction, culturing, concentration or solid-liquid separation, for example, activated sludge used in the treatment of wastewater such as sewer or factory wastewater by the activated sludge method or the like, which can separate purified water from purified water Regarding a processing device.

[0002]

2. Description of the Related Art Conventionally, as a method for treating sewage and separating the resulting mixture of solid and liquid from each other,
Known methods include a method in which the mixture is allowed to stand and the solid is settled and separated by gravity, and a method in which a filter layer is provided and the mixture is passed therethrough to separate the two. In particular, the method of sedimentation is said to be suitable for treating a large volume of solid-liquid mixture.

[0003]

[Problems to be solved by the invention] However,
The method of settling and separating requires a large-capacity settling tank, and therefore requires a large-scale liquid processing apparatus for processing, which requires a large space and construction cost is high. is there. There is also a problem in that the treatment efficiency is poor because sedimentation does not take place easily, particularly when a solid material having a relatively low specific gravity is contained. For example, in the activated sludge method that has been conventionally adopted for purification of wastewater containing a large amount of organic matter, wastewater containing organic matter is continuously supplied from an adjusting tank to an aeration tank, where it was collected and acclimatized in advance. Aerobic bacteria (activated sludge) oxidize and decompose organic substances for purification, but finally lead the mixed solution of activated sludge and treated water to a settling tank and let it settle naturally to make activated sludge into a supernatant liquid. Separated and solid-liquid separated. That is, the purified supernatant liquid is overflowed and discharged, while the sedimented and separated activated sludge is returned to the aeration tank, and the grown components are dehydrated as excess sludge to be solid-liquid separated. The activated sludge forms flocs by bacteria having a floc forming ability. Organic substances are adsorbed on the flocs, and the organic substances adsorbed by the bacteria are then oxidatively decomposed to purify the wastewater. In the above-mentioned activated sludge method, it is a principle that the treated water and the activated sludge are finally separated, and it is desired that sludge has a good sedimentation property and can be easily sedimented in order to improve the treatment efficiency. Therefore, an object of the present invention is to provide a liquid processing apparatus which is excellent in processing efficiency such as solid-liquid separation, is small in size, and has a relatively simple structure and is excellent in economic efficiency, and a liquid processing facility using the same.

[0004]

The above object can be achieved by the present invention described below. That is, the present invention relates to a liquid processing apparatus in which at least one fixed cylinder or a vertical rotating cylinder is provided in the center of a processing tank, and a liquid containing a solid matter, a suspension, and a soluble substance is fixed or rotated. An inlet for dispersing and inflowing from the circumferential direction of the cylinder is provided at the bottom of the processing tank or in the vicinity of the cylinder, and is formed in the middle of the processing tank around the fixed cylinder or around the rotating cylinder. Means for taking out solid matter in the vicinity of the upper surface of the densely dispersed solid matter layer is provided, and the cylinder is provided with means for breaking the easily clumped state generated in the solid matter layer, and A liquid processing apparatus and a liquid processing facility using the same are characterized in that an outlet for a liquid that has passed through and separated between solid layers is provided near an upper portion of the processing tank.

[0005]

When the liquid treating apparatus of the present invention is used for a solid-liquid separating apparatus, for example, an inlet for a liquid containing a solid substance or the like in a treating tank having a fixed cylinder or a rotating cylinder in the center is provided. The liquid introduced from is swirled while the solids and the like are evenly dispersed by rotating the rotating cylinder or by injecting dispersedly from the circumference of the fixed cylinder, and at the same time, the solids and the like settle due to gravity while rising. As a result, a dense layer of solid matter or the like is gradually formed in the processing tank. When a dense layer such as this solid material develops to a certain degree of thickness, a liquid containing the solid material acts as a filter layer when passing through this layer, and the solid material and the like are aggregated in this layer. It becomes possible to easily remove things and the like. Further, since the oldest solid matter forming near the upper surface of the solid matter layer is sequentially removed, a good filtration layer is always formed by the solid matter layer. On the other hand, the liquid passes through the solid layer as described above and rises to the upper part of the processing tank,
As a result of being able to be discharged from the outflow port provided near the upper part of the processing tank, solid-liquid can be easily separated. In this case, if the solid layer is liable to clump, the function as a filtration layer will be impaired. Therefore, it is important to provide a clog prevention means, but in particular, the liquid treatment apparatus of the present invention. When the rotating device is provided, the lump can be easily broken by, for example, providing a convex device that rotates together with the rotating cylinder.

[0006]

The invention will now be described in more detail with reference to the preferred embodiments shown in the drawings. The liquid processing apparatus of the present invention is
As shown in FIG. 1, at least one fixed cylinder or rotating cylinder 5 is provided in a substantially central portion of the processing tank 10. The rotating cylinder is formed so that its rotation can be controlled by power (not shown). Further, the processing tank 10 may have a rectangular shape having a plurality of cylinders or a circular shape. In addition, the flow of a liquid containing a solid substance or the like is provided at the center of the bottom of the processing tank 10 (shown in FIG. 1B) or on the circumference near the bottom of the tank (shown in FIG. 1A or FIG. 1C). An entrance 1 is provided. In particular, when a fixed cylinder is used, it is preferable to provide an inflow port on the circumference to disperse solid substances and the like. The outlet 2 is
It is provided in the vicinity of the central portion of the treatment tank so that the solid matter in the vicinity of the upper surface of the layer containing a large amount of solid matter and the like can be taken out, and at the upper part of the treatment tank 10, the filtered supernatant liquid is discharged. An exit 3 is provided.

The liquid containing the solid matter and the like introduced into the treatment tank having the above structure is vertically rotated by the rotating cylinder 5 provided in the center of the treatment tank 10 or from the circumference of the fixed cylinder. By injecting the particles in a distributed manner, the particles are uniformly dispersed and swirl and rise, while gravity causes the solids and the like to settle. As a result, by appropriately controlling the number of rotations of the rotating cylinder 5, as shown in FIG. A layer 20 containing a large amount of solid matter (solid matter layer) is formed on the circumference of the lower part of 5.
Next, when the layer 20 containing a large amount of this solid substance reaches a certain thickness, this layer acts as a filter, and the solid substance that has flowed in from the inlet 1 at the center of the bottom of the processing tank 10 or on the circumference, The solids of the liquid containing the like are aggregated in the filtration layer (solids layer) 20, and only the liquid rises. As a result, as shown in FIG. 1, the liquid containing the solid matter or the like is separated into a supernatant layer and a layer of the solid matter or the like. In the treatment apparatus of the present invention, since the old solid matter in the upper layer portion of the formed solid matter layer 20 is removed to the outside of the system, a good filtration layer is always provided in the treatment tank 10. Has been formed. .. Further, the supernatant liquid that has passed through the solid layer 20 is discharged from the upper part of the tank to facilitate solid-liquid separation to obtain high-quality treated water.

As shown in FIG. 1, the treatment tank 10 used in the liquid treatment apparatus of the present invention contains a solid substance or the like to be treated which is forced to be fed by a natural flow or a pump (not shown). As long as it is a tank having an appropriate capacity, it has a liquid inlet 1 and a drain 2 for discharging separated solid matter and the like, and has means for efficiently overflowing the supernatant liquid. The shape is not particularly limited. Preferably, the inflow port 1 is provided at the center of the bottom or in the tangential direction of the circumference of the treatment tank 10 as shown in FIG. 1 so that the treated water flowing into the treatment tank 10 easily flows along the wall surface of the treatment tank 10. It was done. Further, the material, capacity, etc. of the treatment tank 10 may be appropriately changed depending on the condition of the water to be treated, that is, the treatment place, the amount of water, the amount of solid matter contained, etc. It may be formed of any material such as concrete, metal such as steel plate, plastic such as hard vinyl chloride resin, wood, and the like, and may have a volume of 0.5 to 500 m ³ , but is not limited thereto.

The rotary cylinder 5 used in the liquid treatment apparatus of the present invention is driven by a drive source (not shown) such as a motor attached to the treatment tank 10 as described above.
The rotating cylinder 5 may have any shape, for example,
As shown in FIG. 1 (a), a hollow cylinder having a bottom plate with a load applied to the upper portion, or a horizontal displacement of the rotating cylinder 5 at the lower portion of the processing tank as shown in FIG. 1 (b). Preventive measures 7, 7
′ Is provided, or as shown in FIGS. 1 and 2, a disc is added to the middle position (shown in FIG. 1B) or the lower position (shown in FIG. 1C) of the cylinder. Any shape may be used as long as it can efficiently stir and swirl a liquid containing solid matter or the like. Besides this, for example,
As shown in FIG. 3, a truncated cone with a slightly thin lower part (shown in FIG. 3A) or a disc with an upper disk (shown in FIG. 3B) may be used. .. Further, in order to break sludge that is easily clumped, a convex (for example, rod-shaped) one may be attached around the rotary cylinder 5, as described later.

Further, in order to facilitate the control of the flow of the liquid containing solid matter and the like, as shown in FIG. 4, a part of the rotary cylinder 5 is a double cylinder, which is also a preferred embodiment. The outer cylinder 50 provided to face the wall surface of the rotating cylinder 5 may be fixed to the treatment tank 10 as shown in FIG. 4A, or may be provided as shown in FIG. 4B. As described above, the structure may be such that it is connected to the rotary cylinder 5 and rotates in conjunction with the rotary cylinder 5. In this case, the rotation speed and direction of the outer cylinder 50 may be the same as that of the rotation cylinder 5, or may be different from that of the rotation cylinder 5 due to the action of a gear or the like, and the direction may be reversed. May be. Also, FIG.
As shown in (c) to (f), if a large number of convex portions are provided on the wall surface of the rotating cylinder 5 or the outer cylinder 50 at this time, it becomes easier to control the flow of the liquid containing the solid matter and the like. The processing efficiency of solid-liquid separation can be improved.

As means for allowing the rotating cylinder 5 to rotate as described above, for example, a similar flange (not shown) is provided inside the upper end of the cylinder 5 or inside the middle stage so that the cylinder 5 can freely rotate from the support. It may be suspended, or may be rotatably supported by an arm (not shown) extending from the bottom of the processing tank 10 or the wall of the processing tank 10. The rotating cylinder 5 as described above has a diameter of about 10 to 30% of the diameter of the processing tank 10, and its length depends on the size and depth of the processing tank 10 and the required processing capacity and power. It can be arbitrarily changed depending on the cost, and in some cases, two or more rotating cylinders can be installed in parallel or vertically.
The rotating cylinder 5 is preferably made of a corrosion resistant material such as stainless steel in consideration of strength and antiseptic property. Further, the wall surface of the rotating cylinder 5 is usually smooth, but it is possible to improve the frictional force with the water to be treated by providing a large number of holes, unevenness and grooves (not shown) on the wall surface.

5 to 7 are plan views of the processing tank 10.
FIG. 7 is an enlarged cross-sectional view of a portion where the supernatant liquid is submerged and discharged. The liquid containing the solid matter introduced from the bottom or bottom of the treatment tank is solid-liquid separated by the rotation of the rotary cylinder 5 as described above, but the supernatant liquid is provided along the wall surface of the treatment tank 10. It is made to flow into the gutter 4 which is flowing into the gutter 4 and is collected, and is collected and discharged from the discharge port 3 provided connected to the gutter 4. The shape of the gutter 4 may be in the treatment tank as shown in FIG. 5 as long as the supernatant liquid can flow in efficiently.
It may be on the outside of the outer wall of the treatment tank as shown in FIG. 6, and its shape is not limited at all. However, since floating matters (scums) 30 may float on the surface of the supernatant liquid, as shown in FIG. 7, a submerged hole 8 is provided at a position slightly lower than the liquid surface of the supernatant liquid, from which the liquid is guttered. It is preferable that the structure is such that it flows into No. 4. Further, as shown in FIG. 7 (b), a partition wall 9 is provided in the gutter 4 so that the treatment liquid which has been submerged as described above is overflowed and discharged, and the scum 30 on the surface is treated. It is a preferable embodiment that the structure does not enter. Furthermore, if the upper part of the partition wall 9 in the gutter 4 is made to have an uneven shape as shown in FIG.

In order to remove the scum 30 on the surface of the treated water, as shown in FIG. 8 (a), a scum guide plate in which the upstream half of the rotating flow is not in contact with the water surface and the downstream half is in light contact with the water surface. 11 may be provided, and the bottomed floating material reservoir 15 may be provided on the wall surface at the most downstream end. By providing such a scum guide plate 11 on the water surface, the scum 30 is affected by the rotating cylinder 5 and moves around the water surface of the processing tank 10 as shown in FIG.
The scum is captured by the guide plate 11 as shown in FIG. or,
It is also a preferred embodiment to collect scum in one place using a fan (not shown). The collected scum 30 is accumulated in the floating material reservoir 15 through the outlet (scum gate) 12. The scum 30 thus accumulated is pumped up by a pump or the like and processed. Of course, in the case where scum does not occur, it is natural that the above-mentioned suspended matter removing means is unnecessary.

The gutter 4 may be fixedly provided in the processing tank 10 as shown in FIG. 8 or the like, but as shown in FIG. 10 without being fixed in the processing tank, the gutter 4 may be provided. A float or a weight 13 may be attached to the lower part of the tank to set it up and down in accordance with the fluctuation of the height of the water surface in the treatment tank 10 (FIG. 10).
(B) Illustration). Further, at this time, as shown in FIG. 10 (a), a liquid treatment apparatus provided with the scum guide plate 11 and having a structure adapted to the water level fluctuation together with the scum guide plate is also a preferred embodiment of the present invention.

In order for the solid material layer 20 to always form a good filtration layer, a means for sequentially pulling out the old solid material in the upper layer portion of the formed solid material layer or a solid material is used. It is necessary to provide a means for preventing a state where lumps are easily formed.
As such an example, as shown in FIG. 8 (b), a plurality of rod-shaped projections may be provided around the rotary cylinder 5 and the solid matter may be pulled out from the tip of the projections by means of a siphon or a pump. In this case, it is a preferable method because it can serve both of the above two means. As other means,
As shown in FIG. 9, the extraction pipe is fixed to the outflow pipe 2 in the vicinity of the upper surface of the solid layer 20 (shown in FIG. 9A), and the extraction pipe is provided at a position perpendicular to the rotary cylinder 5. Is configured as both wings of a rotating cylinder, and is rotated together with the rotating cylinder (shown in FIG. 9 (b)), a lump crusher having a plurality of rod-shaped projections is provided around the rotating cylinder 5, and the rotating cylinder is rotated. There is a mode such as a method (illustrated in FIG. 9A) in which the broken solid matter is pulled out by a pulling tube by rotating together with the cylinder.

The entire wall surface of the rotating cylinder 5 (see FIG. 11)
(A) shown) or a part of the upper part (shown in FIG. 11 (b))
It is also a preferred embodiment of the present invention to use a fine mesh or filter layer. With such a mode, solids and the like do not pass through the mesh or filtration layer, and solids and the like accumulate on the wall surface of the rotating cylinder 5, while only liquid flows into the hollow portion, resulting in solid-liquid separation. Done. The liquid that has flowed and accumulated inside the rotary cylinder 5 is pumped up and discharged as shown in FIG. In addition, the solids and the like caught on the net are shown in FIG.
1 (1) is scraped off by the scraping plate 14 provided in parallel with the wall surface of the rotating cylinder 5 and returned to the processing liquid. Further, at this time, as shown in FIG. 12, a pellet or the like 16 made of a deodorant and / or an antibacterial agent is put in a part of the hollow portion of the rotary cylinder 5, and the treated water passes therethrough. This will prevent the generation of offensive odors in the liquid treatment facility.

The liquid treatment apparatus of the present invention as described above is preferably used for treating sewage by the activated sludge method or chemical treatment (chemical treatment). That is, if the liquid treatment device of the present invention is used in a reaction tank for activated sludge, a reaction tank for chemical treatment, or a settling tank used for separating treated purified water, it is not continuously introduced from the purification reaction tank. Treated water containing treated water, activated sludge and the like enters through an inlet 1 provided at the lower part of the present apparatus, swirls and rises while being uniformly diffused by a rotating cylinder 5, while being solid by gravity. As a result of a certain activated sludge settling, a layer 20 of activated sludge or the like is formed around the rotating cylinder 5.
Can be done. When this layer becomes dense to some extent, the solid matter such as activated sludge in the treated water containing the activated sludge that continuously flows in is captured by this layer 20 and agglomerated, and the treated water purified by the activated sludge and the like. Only the chimney passes through this layer and rises further to form a supernatant. The layer of activated sludge or the like and the supernatant liquid thus separated are discharged respectively, so that the separation of the two can be performed quickly and reliably.

In this case, the rotating cylinder 5 in the processing tank 10
It is also a preferable embodiment to provide the flow shielding plate 40 around the area. At this time, in the case of performing aerobic processing, FIG.
As shown in (a), a flow shield plate 40 having a structure that allows air and ozone to be sent from the lower part of the processing tank 10 to diffuse air is provided. On the other hand, in the case of performing anaerobic treatment, it is preferable to provide a flow shield plate 40 having a shape such that the treated water does not come into contact with air as shown in FIG. Methane gas or the like generated at this time is collected on the upper part of the flow blocking plate 40 and discharged to the outside of the system by a pump or the like. In this case, as shown in FIGS. 14 (a) to 14 (c), a precipitation drawing tube is removed from the solid layer (outer hem solid-liquid separation section) formed around the outer periphery of the rotary cylinder 5. It is possible to connect to a storage tank 60 formed on the upper part of the flow blocking plate 40, and take out from the storage tank to a predetermined place with a device such as a siphon. Incidentally, the reservoir 60
May be formed either outside or inside the upper part of the flow blocking plate 40. For example, in the case of aerobic treatment as shown in FIGS. 14 (a) and 14 (c), A reservoir 60 may be provided on the upper part of the plate, and the drawn tube may be extended to the reservoir 60.
Further, in the case of anaerobic treatment, it is advisable to provide a reservoir outside the upper part of the flow barrier as shown in FIG. 14 (b). Further, in either case of aerobic treatment or anaerobic treatment, the flow blocking plate 40 is made movable so as to prevent the settled sludge on the outer hem of the flow blocking plate from becoming clumped, or separately. It is advisable to provide a device for breaking the agglomerate or to provide a contact material such as fine ceramics in the treatment tank 10 so that the treatment tank 10 functions like a fluidized bed.

[0019]

As described above, according to the processing apparatus of the present invention, the liquid containing the solid substance and the soluble substance introduced from the inflow port in the treatment tank is solidified by the rotation of the rotating cylinder. Is uniformly dispersed and rises while being swirled, and at the same time, solids and the like settle down due to gravity, so that a dense layer of solids and the like is gradually formed in the processing tank. When the dense layer of the solid matter or the like becomes thick to some extent and the thickness increases, the solid matter layer is sequentially removed from the old solid matter, so that the solid matter layer functions as a good filtration layer to remove the solid matter and the like. When the contained liquid passes through this layer, solids and the like are aggregated in this layer, so the liquid passing through this solid layer becomes extremely high-grade treated water.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a liquid processing apparatus of the present invention.

FIG. 2 is a schematic plan view of the liquid processing apparatus of the present invention.

FIG. 3 is a conceptual cross-sectional view showing an example of a rotating cylinder.

FIG. 4 is a conceptual cross-sectional view showing an example of a rotating cylinder having an outer cylinder.

FIG. 5 is a schematic plan view of a liquid processing apparatus according to another aspect of the present invention.

FIG. 6 is a schematic plan view of a liquid processing apparatus according to another aspect of the present invention.

FIG. 7 is a schematic cross-sectional view showing a gutter part.

FIG. 8 is a schematic plan view of a liquid processing apparatus according to another aspect of the present invention.

FIG. 9 is a schematic plan view of a liquid processing apparatus according to another aspect of the present invention.

FIG. 10 is a schematic view of another embodiment of a liquid processing apparatus having a floating overflow gutter according to the present invention.

FIG. 11 is a schematic sectional view of a liquid processing apparatus according to another aspect of the present invention.

FIG. 12 is a conceptual cross-sectional view showing another example of a rotating cylinder.

FIG. 13 is a schematic cross-sectional view of a liquid processing apparatus according to another aspect of the present invention having a flow barrier plate.

FIG. 14 is a schematic cross-sectional view showing a gutter part.

[Explanation of symbols]

 1: Inflow port for solid-liquid mixture 2: Discharge port for solid matter, etc. 3: Discharge port for liquid 4: Gutter 5: Rotating cylinder or fixed cylinder 10: Treatment tank 11: Scum guide plate 12: Scum gate 13: Float or weight 14 : Scraping plate 15: Floating material reservoir 16: Pellet 20: Filter layer 30: Floating scum 40: Flow shield plate 50: Outer cylinder 60: Reservoir

Claims (9)

[Claims] 1. A liquid processing apparatus in which at least one fixed cylinder or a vertical rotating cylinder is provided in the center of a processing tank, wherein a liquid containing a solid matter, a suspension, and a soluble substance is fixed or rotating. Is provided at the bottom of the treatment tank or in the vicinity of the cylinder, and the dense portion formed around the fixed cylinder or the periphery of the rotating cylinder is provided in the middle portion of the treatment tank. Is provided with a means for taking out solid matter in the vicinity of the upper surface of the solid matter layer dispersed in the above, and the cylinder is provided with means for breaking the lumpy state generated in the solid matter layer, and A liquid processing apparatus, wherein an outflow port for the liquid that has passed through and separated between the material layers is provided near the upper portion of the processing tank. 2. The liquid treatment according to claim 1, wherein a trap plate (scum guide plate) for capturing suspended matters (scum) and a scum gate for trapped scum (scum gate) are provided in the vicinity of the liquid surface of the treatment tank. apparatus. 3. The gutter according to claim 1, wherein a gutter into which the separated liquid flows is provided along the outer circumference of the processing tank, and the gutter has a floating structure which is fixed together with the scum guide plate or responds to fluctuations in water level. Liquid handling equipment. 4. The liquid processing apparatus according to claim 3, wherein the liquid treatment apparatus is connected to the gutter and is provided with an outflow port to the gutter of a diving hole provided at a position lower than the water surface. 5. The liquid treatment apparatus according to claim 4, wherein all or only the peripheral portion of the rotating cylinder is a mesh or a filtration layer. 6. The liquid processing apparatus according to claim 5, wherein a deodorant and / or an antibacterial agent is enclosed inside the rotary cylinder. 7. The liquid processing apparatus according to claim 1, wherein a flow shield plate that is fixed or rotates is provided in the periphery of the rotating cylinder in the processing tank. 8. The liquid treatment apparatus according to claim 1, wherein the treatment tank is a reaction tank, a culture tank, a concentration tank or a separation tank. 9. A liquid treatment facility including a pretreatment facility or a pumping facility, comprising the liquid treatment apparatus according to any one of claims 1 to 8.