JP4678627B2 - Cleaning processing method and cleaning processing apparatus - Google Patents

Description

  The present invention relates to a cleaning processing method and a cleaning processing apparatus.

In the sand basin provided in the water purification treatment plant, sewage from rivers and general households is introduced, where the sewage contained in the sewage is raked up by a rake and the sedimented sewage is pumped up. To process.
Dirty sand is collected and incinerated and discarded or reused in the sea. However, a large amount of organic solids are attached and mixed in it as it is. Even if it becomes necessary or reused, there will be problems such as cracking in concrete.
For this reason, there is a method in which organic solids are refined by incineration disposal while pulverizing dirty sand with a drum screen or the like so that the above problems do not occur. It is not valid anymore.
Therefore, the present applicant has developed and proposed an effective cleaning processing apparatus that solves the above problems prior to the present application. The proposal is intended to provide a cleaning processing apparatus that can increase the cleaning efficiency by placing it on a cleaning path that circulates without retaining residue and / or dirt sand at the bottom of the processing tank. The treatment tank which is the main body of the apparatus has an introduction path for introducing sewage containing sediment and / or sewage sand into the lower part of the tank, means for discharging the sewage in the tank, washing water supply means, Means for discharging sand and mud, and in the treatment tank, there is a contact levitation path in which the one introduced into the treatment tank rises together with a plurality of separation promoting pieces by means of the air and / or water rising force generation means. The levitation pipe provided is provided to extend vertically, and in the same processing tank, the upward flow in the contact levitation path is again introduced to the lower end of the contact levitation path together with the separation promoting piece and circulated together with the contact levitation path. Shape the road And a scum removing device for removing the separated levitated material separated and floated from the introduced sewage to the outside of the tank. In the lower part of the tank, there is provided a porous control material that crosses the lower part of the processing tank so as to leave the introduction path in communication with the lower part of the processing tank, and in the lower part of the processing tank An up-and-down opening promotion pipe is inserted and supported so as to pass through a through hole provided in the porous control member, and a lower end opening of the rising promotion pipe communicates with a lower control material region of the treatment tank. On the other hand, the upper end opening of the pipe is arranged so as to face a slightly upper center in the lower end opening of the levitation pipe, and the rising promotion pipe communicates with the rising promotion pipe. It is a cleaning processing device Patent Document 1).

  Japanese Patent No. 3811887

According to the technique disclosed in Patent Document 1, sewage containing sediment and / or sewage sand is guided to the lower part of the tank through the introduction path, and the sewage is generated by the air and / or water upflow generation means through the levitation promoting pipe. While being blown up to the contact levitation path in the levitation pipe through the porous control material and being circulated through the settling path in the tank, it is configured to be washed with the contact stirring action by the separation promoting piece.
However, there are many cases in which this cleaning treatment apparatus is used as it is, not only for sewage containing residue, but also for rainwater. In that case, when heavy rain occurs, a large amount of rainwater flows into the settling basin, and the sand mud sent from the settling basin by a bucket conveyor or the like increases at a stretch. In such a situation, if the cleaning treatment apparatus is used, a large amount of sand mud to be cleaned that has not been subjected to cleaning treatment stays and accumulates on the sand mud discharge port at the lower end. And the cleaning function using the original levitation pipe and separation promoting piece may be significantly degraded, leading to an inoperable situation. I was supposed to.
Sand mud from the rainwater sucked into the levitation pipe rises with the separation promoting piece in the levitation pipe and descends the settling path from its upper end opening, and further the lower ends of the porous control material and the levitation pipe. Because of the structure that can be sucked up again, the sand and mud will circulate repeatedly on the track connecting the settling path from the inside of the levitation pipe. This is not only a wasteful operation for washing sand and mud from rainwater that is easily separated, but also an apparatus that is not suitable for efficient washing of sand and mud that are introduced one after another.
Further, when the apparatus is stopped, the separation promoting pieces that have been circulated until then are all collected on the porous control material. However, when the operation is resumed, these separation promoting pieces cannot be sucked up. As a result, there is a possibility that the cleaning function by the separation promoting piece may be deteriorated.

  The present invention is intended to solve the problems of such a conventional method, and prevents the particles having a large particle size from being washed and accumulated on the bottom of the tank to be originally processed. Improves the cleaning capacity of small-sized sand mud and realizes one-time efficient cleaning instead of multiple times of sand mud cleaning so that a large amount of sand mud can be cleaned one after another without excessive operation. In addition, the separation promoting piece when the apparatus is stopped is also left in the floating pipe, and the rising and circulation during the next operation can be washed using all the pieces effectively. The purpose is to provide.

In order to achieve the above-mentioned object, the invention according to claim 1, the sand mud to be washed that exceeds a certain particle size is subjected to a washing treatment after settling inside the tank and a discharge treatment, For sand mud to be cleaned that is less than a certain particle size, it is introduced into the vertical floating pipe through the hole of the porous control material at the lower end of the pipe by the upward flow of the fluid introduced from the lower end of the pipe, and then the floating pipe About the already washed sand mud that is introduced from the middle and brought into contact with the separation promoting piece that rises together with the upward flow to be washed and led to the screen together with the separation promoting piece as the washed sand mud. while discharging through the discharge means by lowering separated from the separation promoting pieces through screen, towards the separation promoting pieces later by transport through the upper screenscrape Washing treatment is performed by returning to the levitation pipe through the return pipe that connects the lean and the levitation pipe to the washed sand mud that rises in the circulatory flow and rises in the levitation pipe. I tried to do.
The invention according to claim 2 is an apparatus main body in which cleaning water is filled and sand to be cleaned can be introduced from the settling basin, and the sand to be cleaned can be settled in the cleaning water. The treatment tank is a vertically oriented pipe having an opening at the top and bottom, and a lower end opening is provided with a porous control material that allows passage of sand to be cleaned that is less than a certain particle size, and guides a fluid such as air or water. a floating pipe to enable increased to be cleaned sand mud less than said predetermined diameter by generating upflow internally provided with a levitation accelerating pipe with a plurality of separation promoting pieces, from the top outlet of the floating pipe screening the predetermined particle size less than the while receiving the object to be cleaned sand and mud and separation promotion piece only be cleaned mud already as wash sand and mud only one separation promotion piece passing downward in controlled so as to flow a fixed direction Includes the, a return pipe for returning the separation promoting pieces on the screen in the floating pipe, and a discharge unit configured to discharge available-be-cleaned sand and mud and already cleaned sand and mud come to settle outside Yes.

  Since the present invention is configured as described above, it prevents the accumulation and accumulation of uncleaned processing parts having a large particle size from the bottom of the tank and improves the cleaning processing ability of sand mud having a small particle size that should be processed originally. In addition to over-cleaning the sand mud several times, one or several times of efficient cleaning is realized, so that a large amount of sand mud can be washed and discharged one after another without over-running. It is possible to provide a cleaning processing method and a cleaning processing apparatus in which the separation promoting pieces at the time of stopping remain in the floating pipe and the rising and circulation at the next operation can be cleaned using all the pieces effectively. it can.

  BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an apparatus longitudinal schematic front view showing an embodiment of a cleaning processing method and a cleaning processing apparatus according to the present invention.   II-II sectional view taken on the line of FIG.   The III-III line expanded sectional view of FIG.   Sectional drawing which shows other embodiment about the connection position of a return pipe.   The cross-sectional top view which shows other embodiment about a screen.   The cross-sectional view which shows other embodiment about a screen.

  Hereinafter, an embodiment of the method and apparatus of the present invention will be described with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a processing tank which is an apparatus main body, which is fixedly installed on a gantry 2. The upper part of the processing tank 1 has a rectangular cylindrical shape as shown in FIG. 2, and the lower body part is a right inclined wall 3 whose right side in FIG. 1 has an upper left inclined wall 5 of about 60 degrees, a left vertical wall 6 and a lower left inclined wall 7 of about 45 degrees. When the treatment tank 1 of FIG. 1 is viewed from the left side, the height equivalent portion from the upper rectangular tube-shaped portion to the upper left inclined wall 5 below it is straight with a uniform width and corresponds to the left vertical wall 6. The portion to be formed is a slightly narrowed taper shape, and the portion corresponding to the lower left inclined wall 7 is a further narrowed taper shape.

  A main lid 9 is detachably fixed to the main body of the treatment tank 1, and a sand mud introduction tube 10 is provided on the left side of the main lid 9 so that rain mud from the sand basin passes through a bucket conveyor (not shown). As shown by the arrow A, it can be put into the tank. A removable lid 11 is attached on the main lid 9 and can be opened and closed for maintenance.

  Reference numeral 13 denotes a levitation pipe. The vertical portion is a pipe body 14, and a suction portion 15 having an expanding taper is provided at the lower end, and a porous control member 16 is provided transversely at the lower end opening of the suction portion 15. It becomes. The suction portion 15 extends so as to have an inclined surface of about 45 degrees, but it may be made more constricted by about 30 degrees as shown in FIG. . The eyes of the control material 16 pass only those having a particle diameter of less than a certain particle size (here, 10 mm).

  In addition, the levitation pipe 13 has a leading opening of the first levitation-promoting pipe 17 inserted into the lower left inclined wall 7 so as to face the suction portion 15 through the center of the control member 16 and thereby air (or a fluid such as water). ) And the lower end of the second levitation-promoting pipe 18 provided along the pipe main body 14 through the upper end of the processing tank 1 is in communication with the lower end of the pipe main body 14 in a continuous manner. Has been. The first and second levitation-promoting pipes 17 and 18 are capable of generating the upward flow B in the internal washing water as indicated by the arrow B in FIG. An elbow 19 is provided at the upper end of the pipe main body 14, and an outlet 20 that is the upper end opening is supported by the upper partition wall 21. From the second levitation promoting pipe 18, air (or a fluid such as water) is continuously ejected into the levitation pipe 13.

  Such a levitation pipe 13 has a fixed particle size (in this case, of the settling sand mud) while leaving a settling flow area 22 that causes the input sand mud in the treatment tank 1 to sink as shown by an arrow A in FIG. A heavy thing exceeding a certain particle size is sucked up only as long as less than 10 mm) and is placed close to the sand mud introduction path 10 so as to be settled as shown by an arrow C and led to the discharge communication port 4.

  Reference numeral 25 denotes a lower partition wall, which is fixedly disposed horizontally across the tank 1 so as to be in the cleaning water 26 at a position closer to the right oblique wall 3 than the upper partition wall 21. In the space formed between the lower end of the upper partition wall 21 and the upper end of the lower partition wall 25 and between the front and rear tank walls in FIG. 1, an upper screen 26 that gently falls to the right is fitted. Washed water and separation promoting pieces (diameter 10 mm) 27 including the washed sand mud (particle size less than 10 mm) derived from the outlet 20 are received and washed washed while flowing down in the inclined direction as indicated by arrow D. Only the minute portion passes and settles as indicated by arrow E, while the separation promoting piece 27 is such that the longitudinal direction of the crosspiece is oriented in the inclined direction so that it can be transferred in the inclined direction.

  Further, a lower screen 28 is provided between the lower partition wall 25 and the right inclined wall 3 at a height lower than the upper screen 26, and the screen 28 is separated as indicated by an arrow X in FIG. It has a valley shape so as to receive the promotion piece 27 and guide it on the line where the pair of screens 28, 28 meet. The upper screen 26 and the lower screen 28 have a relationship in which the vertical bars thereof are perpendicular to each other. The screens 26 and 28 may be punched metal.

  An upper end opening of the return pipe 30 extending from the lower portion of the levitation pipe 13 faces the valley portion of the lower screen 28. The return pipe 30 is a pipe that accepts the remaining separation promoting pieces 27 while removing the washed sand mud as indicated by the arrow F by the lower screen 28 and flows down into the floating pipe 13 through the inclined pipe. ing. The return pipe 30 and the levitation pipe 13 and the upper and lower screens 26 and 28 form a circulation (loop) path with the separation promoting piece 27 as a closed flow path.

  Note that the screen 26 can be taken out by opening the lid 11, and the screen 28 is also separated from each other with a gap between each other, so that the return pipe 30 is left as shown in the upper right of FIG. It is convenient to perform maintenance such as screen clogging removal and screen cleaning easily and reliably. Further, it is advantageous in that maintenance can be freely performed by opening the lid 11 so that the separation promoting pieces 27 are recovered by a net and cleaned or newly replaced. The lid 11 can adopt a folding type. A washing water nozzle 31 is used for washing the inside of the treatment tank 1, and 32 is an overflow pipe for stabilizing the washing water 33 in the tank.

Reference numeral 35 denotes a screw type scraper (discharge means), which is fixed to the right slant wall 3 in a vertically slanting manner so that the lower end opening communicates with the discharge communication port 4, and the sand mud to be cleaned exceeding a certain particle size is indicated by an arrow C. The washed sand mud that settles again is accepted as indicated by the arrow G, is swept up as indicated by the arrow H, and is discharged as indicated by the arrow 1.
In addition, 36 is a water supply pipe, and as shown in FIG. 3, it is connected to the vicinity of the lower end of the screw pipe 37 of the hoisting machine through a valve 38 so that water is always supplied into the pipe 37 as indicated by an arrow J. Then, the sand mud to be cleaned exceeding a certain particle size is scraped up while being washed, and when the operation is stopped, the valve 39 is opened so that the sand mud accumulated in the inner bottom through the oppositely arranged discharge pipe 40 is indicated by the arrow K. So that it can be discharged.

  The treatment tank 1 is filled with the cleaning water 33 by the water supply from the water supply pipe 36 and is always kept at a constant level by the overflow pipe 32. A large amount of sand and mud from the sand settling basin where a large amount of rainwater flows due to heavy rain and the like is successively introduced into the treatment tank 1 through the sand and mud introduction cylinder 10 by a conveying means such as a bucket conveyor.

Of the sand mud to be cleaned that exceeds a certain particle size, the tank 1 settles in the tank 1 as indicated by the arrow A and is guided into the rake 35 through the discharge communication port 4. After being washed by the water supply, it is discharged as indicated by arrows H and I.
Of the sand mud to be cleaned, those that exceed a certain particle size are slightly contaminated and easy to remove, and therefore can be easily and reliably cleaned by the water supply.
As for the sand mud to be cleaned having a particle size less than a certain particle size, an upward flow is obtained as indicated by arrow B by supplying the fluid from the first and second levitation promoting pipes 17 and 18, and the suction force acts. It is forcibly introduced into the levitation pipe 13 through the eyes of the porous control material 16.
The sand mud to be cleaned is rising and is subjected to an effective cleaning action by the circulating separation promoting pieces 27... And is guided from the outlet 20 to the upper screen 26. In this way, the separation facilitating piece 27 is guided to the return pipe 30 from the lower screen 28 as shown by the arrow D and again into the levitation pipe 13. It contributes to the cleaning of sand mud to be cleaned that rises one after another. Since the two-stage screens such as the screens 26 and 28 are configured, the separation promoting pieces 27 are guided to the return pipe 30 surely and smoothly at all times while having a simple structure.

The already washed sand mud separated from the screens 26 and 28 and sinking as indicated by the arrow E is discharged by the rake 35 through the discharge communication port 4 due to the flow-down action along the right inclined wall 3. .
Sand mud accumulated in the bottom area of the rake 35 is removed from the discharge pipe 40 and the tank is appropriately cleaned with water from the cleaning water nozzle 31.
The separation promoting pieces 27 when the operation of the apparatus is stopped accumulate on the porous control material 16 which is the lower end region of the levitation pipe 13, but the eyes of the control material 16 pass the separation promoting pieces 27. Since it is not large in size, it is not released to the outside and waits in the levitation pipe 13 to the last. When the next operation resumes, first. It is possible to maintain the cleaning effect assumed for a long time because it is forcibly raised by the fluid ejection of the second levitation promoting pipes 17 and 18 and all contributes to the contact cleaning.

The embodiment can be modified in the following points.
As shown in FIG. 4, the return pipe 30 may have a lower end opening connected to the vicinity of the lower end of the levitation pipe 13. The contact cleaning action of the separation promoting piece 27 can be taken for a long time. The upper and lower screens 26 and 28 are provided with the full tank width, but may be of a narrow type as shown in FIG. In this case, the screens 26 and 28 are provided with side edges that prevent the separation promoting piece 27 from spilling to the side.
Further, as shown in FIG. 6, a screen 42 having a triangular shape may be provided on the inverted quadrangular pyramid surface to form the screen 42. As shown in the figure, the screen 42 and the levitation pipe 13 may be arranged in parallel in two rows or other multiple rows. The screen 42 may be moved up and down along the guide bar 41 to perform maintenance. The raising / lowering guide method using the guide bar 41 can also be applied to the screens 26 and 28 of FIG. Also in FIG. 2, a plurality of rows such as two rows of the levitation pipes 13 may be provided.
Further, as shown in FIG. 1, a control plate 43 for directing the already washed sand mud (arrow E) that has settled to finish the sand mud to be washed once in the direction of the discharge communication port 4 may be provided. . The control plate 43 is supported via the return pipe 30 or the tank side wall.
The two levitation promoting pipes 17 and 18 can be combined into either one.
Further, in the above description, the treatment target is rainwater, but dirty sand from sewage such as sewage can also be treated.

    DESCRIPTION OF SYMBOLS 1 ... Processing tank 10 ... Sand mud introduction pipe | tube 13 ... Levitation pipe 17, 18 ... Levitation promotion pipe 26, 28 ... Screen 27 ... Separation promotion piece 30 ... Return pipe 33 ... Washing water 35 ... Raising machine (discharge means) .

Claims (2)

Of the sand to be cleaned that exceeds a certain particle size, the inside of the tank is settled and then washed and discharged. On the other hand, for sand that is less than a certain particle size, Then, the fluid is introduced from the lower end of the pipe through the hole of the porous control member at the lower end of the pipe and then brought into contact with the separation promoting piece introduced from the middle of the floating pipe and rising along with the upward flow. The washed sand mud is taken out on the screen together with the separation promoting piece as the already washed sand mud, and further, the washed sand mud led out on the screen is separated from the separation promoting piece through the screen and lowered to be discharged through the discharging means. On the other hand, the separation promoting piece is moved through the screen and then the inside of the return pipe connecting the screen and the levitation pipe. Cleaning method which is adapted to the cleaning treatment by contacting with an object to be cleaned sand and mud coming upward in floating pipe riding again circulating flow by the upflow back Flip to the the floating pipe. The treatment tank, which is the main body of the equipment that is in a state filled with washing water and is capable of introducing the sand to be washed from the settling basin and into which the mud to be washed is allowed to settle in the washing water, has an open top and bottom. internal comprising a floating promoting pipe conducting fluid, such as air or water with the the vertical pipes and is the lower end opening provided with a porous control timber for passing those below a certain grain size of the object to be cleaned mud a floating pipe tHAT by generating an upward flow is possible Noboru Ue and with a plurality of separation promoting pieces to be cleaned sand mud less than said predetermined diameter, said less than a predetermined particle size from the top outlet of the floating pipe a subscription over emissions be controlled so as to flow a fixed direction only one separation promoting pieces passing downwardly as already washed sand and mud only the object to be cleaned mud while receiving an object to be cleaned sand and mud and separation promoting pieces on the screen Separation A return pipe for returning the advance piece in the floating pipe, precipitated come cleaning device to be cleaned sand and mud and already cleaned sand and mud and a discharge means is configured to be discharged to the outside.

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