JP5720061B2 - Pressurized floating scum separation treatment device - Google Patents

Description

  The present invention relates to a pressurized floating scum separation processing apparatus.

  When the collected scum-containing sewage is introduced into the levitation separation tank, the scum that has been levitated will be discharged from the top by spraying under reduced pressure with water in which air is dissolved by pressurization and promoting scum ascent. The pressurized levitation method is a known technique. As a technique related to such a technique, there is a technique disclosed in Patent Document 1.

JP 2005-111375 A

The technique according to Patent Document 1 discloses a scraper that rakes a scum that floats toward a scum discharge trough provided in a pressurized levitation concentration tank (a levitation separation tank), and a scum that is sent from the scraper. And a scum discharge trough that receives the scum from the discharger and sends it to the scum treatment facility.
This scum pressurized levitation concentrator discharges the scum that has been levitated from the pressurized levitation and concentration tank and allows these scum to be transported to a remote scum treatment facility. The means for discharging consists of a scraper, which is a chain with a scraping plate protruding from the outer periphery, and a discharger with a scraping blade that moves along the curved surface and rotates around the rotation axis. The scum discharge trough is discharged, so the scum that floats up contains enough moisture and discharges it as it is, so that wasteful power is consumed for transportation to the scum treatment facility, Moreover, it is necessary to separate scum and moisture at the transport destination. Therefore, it is conceivable to install a screw in the scum discharge trough to dehydrate the scum. However, if the scraper and screw drive systems are configured independently, the drive system of the discharge machine is also independent. Therefore, there is a disadvantage that not only the structure of the apparatus is complicated but also it is difficult to reduce the cost.

  The present invention is intended to solve these problems. By adding a dewatering process to a scum that has been lifted and scraped in combination with a scraper and a screw, transport to a scum processing facility is possible without wasteful power consumption. To provide a pressurized floating scum separation treatment device that eliminates the need for water separation at the same time and simplifies the structure of the device and reduces costs by linking the drive systems of the scraper and screw. Objective.

In order to achieve the above object, the present invention provides a rectangular three-dimensional housing having a rectangular bottom wall and front, rear, left and right elevation walls rising from each of the four sides of the bottom wall. A partition plate is raised at a position in front of the enclosure on the front side elevation wall to form a tank, and scum-containing sewage and air-dissolved water are introduced into the tank to maintain a certain level of water surface. A floating separation tank in which scum can float on the water surface from the introduced water, and the lower end of the slope is located below the surface of the water in the floating separation tank, the middle of the slope is located at the upper end of the partition plate, and the upper end is from the upper end of the partition plate An inclined plate-shaped raking guide disposed so as to be inclined to the outside of the flotation separation tank, a scum discharge trough disposed so as to be located outside the flotation separation tank via the upper end of the flotation guide, Dehydrator installed in the scum discharge trough And a screw provided so as to be freely rotatable, and driven by a single drive source in a relation with the screw as if the scum that floated was scraped and lifted toward the scum discharge trough. The scraper is disposed between the front shaft and the rear shaft, the front shaft positioned above the upper portion of the lifting guide, the rear shaft positioned on the water surface with the rear elevation wall, and the rear shaft. Intermediate shafts, and a pair of left and right rake-up interlocking materials are hung through sprockets provided at the left and right ends of each of the shafts. a plurality upper floatation is attached formula scum separation processing apparatus of the scraper body to the orbital movement, the intermediate shaft and the intermediate sprocket, the wanted bend direction raked tip shaped folding A plurality of scraper bodies, which are formed in a bar shape and the base part of which is attached to the raked interlocking member so as to be able to rotate back and forth, sag vertically until the tip of the scraper guides, and then the tip is lifted up. After reaching the guide, the relative angle with respect to the vertical line from the raked interlocking member is gradually opened, and the tip is placed on the rake guide while being tilted back to the range of 70 to 80 degrees. It is arranged near the upper side in the middle of the inclination direction of the lifting guide so that the lifting operation is performed with the tip on the lifting surface while keeping the tilted state of the angle range after the operation. It is characterized by being .

As described above, the invention described in claim 1 is a rectangular three-dimensional housing having a rectangular bottom wall and front, rear, left and right elevation walls rising from each of the four sides of the bottom wall. A partition plate is raised at a position in front of the housing to form a tank, and scum-containing sewage and air-dissolved water are introduced into the tank so as to maintain a certain level of water surface. The levitation separation tank in which the scum can float, the lower end of the slope corresponding to the water surface below the levitation separation tank, the middle of the slope is located at the upper end of the partition plate, and the upper end from the upper end of the partition plate to the outside of the floating separation tank An inclined plate-shaped raking guide arranged so as to extend in an inclined manner, a scum discharge trough arranged so as to be positioned outside the floating separation tank via the upper end of the rafting guide, and provided in the scum discharge trough Rotating drive with dehydration function And a scraper adapted to be driven by a single drive source in conjunction with the screw as a scum that lifts and lifts the raised scum toward the scum discharge trough. The scraper includes a front shaft located above the upper part of the lifting guide, a rear shaft located on the water surface having the rear elevation wall, and an intermediate shaft disposed between the front shaft and the rear shaft. And a pair of left and right raked interlocking members are hung through sprockets provided at the left and right ends of each shaft, and these raked interlocking members make a revolving motion from above the water via the lifting guide. a plurality is floatation above equation scum separation device mounted in the body, the intermediate shaft and the intermediate sprocket, on the form of the bar-shaped bent-shaped want bent in the direction raked tip And the scraper body, whose base is attached to the raked interlocking member so as to be able to rotate back and forth, hangs vertically before the tip of the rake guide touches, and then the tip hits the rake guide. The rake is lifted up with the tip placed on the rake guide while the angle is gradually opened relative to the vertical line from the raked interlocking member and falls back to the range of 70 to 80 degrees. It is arranged near the upper side in the middle of the inclination direction of the lifting guide so as to perform the lifting operation with the tip on the lifting surface while maintaining the state of falling down in the angle range. Therefore, a pressure floating type scum separation treatment device that not only provides the dewatering effect of the scum by the screw, but also obtains the dewatering effect at the time of scraping by the scraper body in the previous stage. Can be provided.

  FIG. 3 is a cross-sectional view showing an embodiment of the present invention along the line II in FIG. 2.   II-II sectional view taken on the line of FIG.   III-III sectional view taken on the line of FIG.   The cross-sectional view which shows other embodiment.   VV sectional view taken on the line of FIG.   The perspective view which shows other embodiment about a scraper.   The perspective view which shows other embodiment about a scraper.   Side sectional drawing which shows other embodiment of the raking method.

FIG. 1 to FIG. 3 show an embodiment of a pressurized floating scum separation processing apparatus according to the present invention. Reference numeral 1 denotes a treatment tank, and the treatment tank 1 is detachably mounted on a pedestal (not shown) that can enter and exit from the installation base at a certain height (for example, around 2 m).
The treatment tank 1 is a rectangular solid body with an open top surface, which is composed of a rectangular bottom wall and front, rear, left and right elevation walls that stand up from each of the four sides of the bottom wall and are hermetically sealed. A floating separation tank 3 is formed on the right side of the interior by raising a vertical partition plate 2 so as to cross the inside of the tank 1 while leaving the upper part.
In the floating separation tank 3, a water surface 4a is set at a certain level by water 4 supplied by water supply means (not shown). A floating guide pipe 5 is fixed on the bottom wall of the floating separation tank 3 as a straight cylinder, and a double-row (or donut-type) aeration pipe 6 is fixedly disposed on the bottom surface. Yes.

  A separation water pipe 8 is inserted between the lower part of the partition plate 2 and the lower part of the vertical wall of the treatment tank 1 so as to guide the lower layer water in the floating separation tank 3 into the separation water tank 9 provided outside the treatment tank 1. It is. Reference numeral 10 denotes a filter provided in the separation water pipe 9 for guiding the lower layer water into the separation water tank 9 as clean separation water 11. Reference numeral 12 denotes an overflow port for keeping the water surface level in the separation water tank 9 constant and defining the water surface 4a in the floating separation tank 3 at the same level.

Reference numeral 15 denotes an air dissolving device, which is provided outside the processing tank 1 independently. The air dissolving device 15 includes a vertical cylindrical air dissolving tank 16 whose top and bottom are closed. An air refining section 18 that receives compressed air from an air supply source (compressor or the like) 17 to be refined is provided in the inside of the air dissolution tank 16, and is passed through a spring 19 in the middle of the cylinder. An on-off valve 21 that is urged in the direction of the hole 20 and opens at a constant pressure is provided. 22 is an inlet side pipe, the base end is connected to the separation water tank 9, the water supply pump 23 is connected to the trough, and the tip is connected to the upstream side (lower side) of the pressurizing valve 21 of the air dissolution tank 16. The separation water 11 is introduced into the air dissolution tank 16 and the refined air is dissolved to a supersaturated state under a state where internal pressure is applied.
The pressurizing valve 21 opens at a predetermined internal pressure or higher and discharges water in which the air is sufficiently dissolved from the outlet side pipe 24. The inlet side pipe 22 may be connected to the floating separation tank 3 as shown by a broken line in FIG.
The outlet side pipe 24 is connected to a sewage supply pipe 25 so as to join the collected scum-containing sewage and the air-dissolved water, and then guide the combined sewage into the levitation guide pipe 5. The air supply source 17 and the diffuser pipe 6 are connected by an air supply pipe 26.
The diffuser pipe 6 may be installed on the outer periphery of the levitation guide pipe 5, and the sewage supply pipe 25 is connected to the lower center of the levitation guide pipe 5 so as to float the combined water. Good.

  A tank lid 30 is attached to the upper part of the processing tank 1 so as to be openable and closable. On the upper part of the processing tank 1, a scraper (scum scraping / raising device) 32 is provided, and an upper part of the partition plate 2 is provided. A scraping guide 33 formed by bending and forming a flat metal plate having the same outer width as the inner width of the treatment tank 1 into a base shape raised the upper end 33a larger than the water surface 4. It is fixed in the state. Reference numeral 33b denotes a rake receiving surface which is formed as an inclined surface of about 45 degrees and whose lower end is at a level slightly submerged than the water surface 4a, while its horizontal upper edge is the upper end 33a.

  On the other hand, the scraper 32 includes three rotatable shafts, that is, a front shaft 35, a rear shaft 36, and an intermediate shaft 37 thereof, and these shafts are attached to the side wall of the processing tank 1 in a state where both ends are supported. A pair of left and right front sprockets 38, rear sprockets 39, and intermediate sprockets 40 are attached to the axial positions of the shafts 35, 36, and 37 corresponding to the inside of the processing tank 1, and scraped through these sprockets 38 to 40. Lifting interlock members (chains or link chains) 41 are hung so as to form a pair of left and right. Reference numeral 42 denotes a tensioner.

  In the drawing, three scraper bodies 43 are mounted on the outer periphery of the lifting interlocking member 41 and are driven to circulate from the water surface 4 in the direction of arrow A in FIG. . Reference numeral 44 denotes a second interlocking sprocket mounted on the outer shaft of the front shaft 35. The scraper main body 43 is a buoyant body having a flat strip shape, and may be made of wood or resin, and its base portion is fixed so as to be perpendicular to the rake interlocking member 41 and rises. It is designed to circulate in the same posture.

  Reference numeral 47 denotes a scum discharge trough, which has a U-shaped saddle shape integrally including a semi-cylindrical portion 47a and a front plate portion 47b and a rear plate portion 47c that rise vertically. As shown in FIG. 3, the semi-cylindrical portion 47a is fixed in a gentle inclined posture so that one end is slightly higher and the other end is slightly lower. The rear plate portion 47 c is integrated along the one end 33 a of the raking guide 33 such that one end side is low and the other end side is high. One end wall 47d and the other end wall 47e of the scum discharge trough 47 are closed plates, and an inclined screw shaft 48 is rotatably mounted on the semicylindrical portion 47a so as to be parallel to the semicylindrical portion 47a. ing. A screw blade 49 is attached to the outer periphery of the screw shaft 48 to constitute a screw 50, and an arrow B direction that is the same as the arrow B direction by an external drive source (a combination of a motor and a speed reducer) 51. To be driven.

A first interlocking sprocket 53 is mounted outside the other end of the screw shaft 48 so that the second interlocking sprocket 44 is rotationally interlocked via an interlocking chain 54. Reference numeral 56 denotes a fixed receiving plate, 57 denotes a shift receiving plate, and the fixed receiving plate 56 is provided so as to rotate relative to the screw shaft 48 along the end wall 47a of the trough 47. The non-rotating state is provided around the screw shaft 48 so as to face the fixed receiving plate 56 at a distance from each other. Between the fixed receiving plate 56 and the shift receiving plate 57, the shift receiving plate 57 is linear in the axial direction. A guide 59 composed of a combination of a shaft and a pipe for advancing and retreating is inserted along with a repulsion spring 58.
As shown in FIGS. 1 and 3, the shift receiving disk 57 is in contact with the end face of the screw blade 49 before operation. When the scum is taken into the scum discharge trough 47 as indicated by the arrow S and the screw 50 is driven to rotate, the scum S is pushed in the direction of the arrow X and the pressing force of the scum S in the direction of the arrow X As a result, the shift receiving plate 57 moves backward in the same X direction by the linear guide of the guide 59 while receiving the spring repulsive force.

  As a result, the scum S is subjected to a dehydrating action, and the upper end opening of the discharge chute 60 connected to the bottom of one end side of the scum discharge trough 47 is opened by the backward movement, so that the dewatered scum passes through the chute 60 one after another. And is sent to the next scum processing facility by a conveying means such as a container or a belt conveyor (not shown). In addition, 61 is a drain outlet, and drainage is returned to the floating separation tank 3 by a drain pipe 62.

In the supply water 4 having a water surface 4 a set in the levitation separation tank 3, the combined water of the scum-containing sewage collected from the scum-containing sewage with the fine air dissolved in the separation water 11 is levitated through the sewage supply pipe 25. The scum is ejected from the pipe 5 into the supply water 4, whereby the scum floats and separates in the supply water 4 and floats as the scum S on the water surface 4 a. Air diffused from the air diffuser pipe 6 also leads to promotion of floating separation.
When the screw shaft 48 is rotationally driven by the drive source 51 and the first interlocking sprocket 53 and the interlocking chain 54 are rotated, the front shaft 35 is moved via the second interlocking sprocket 44 and the scraper 32 is circulated. As a result, the scraper main body 43 scrapes the scum S on the water surface in the direction of the lifting guide 33 and then drops it into the scum discharge trough 47 so that the scraper body 43 is rotated in the direction of the slope X as indicated by the arrow X by the screw 50. It is fried. The scum compressed and dehydrated as described above is discharged through the discharge chute 60.

The drive source 51 may be disposed so as to directly drive, for example, the front shaft 35 on the scraper 32 side, as indicated by a virtual line in FIG.
As shown in FIG. 4, the separation water tank 9 may be installed integrally with the tank using the space below the scum discharge trough 47 in the floating separation tank 3 so as to make the entire apparatus compact.

  The scraper body 43 is fixedly disposed between the left and right lifting interlocking members (chains) 41 so as to maintain a vertical posture in the chain. However, as shown in FIGS. Alternatively, the scraper body 43 may be provided in a state where the scraper shaft 43a is mounted on the scraper shaft 43a so as to be freely rotatable back and forth. When the scraper body 43 is lifted along the scraping receiving surface 33b as shown in FIG. 4 using a plate material bent in a square shape when viewed from the side, the scraper body 43 tilts backward with respect to a line perpendicular to the line of the scraper body 43. It shall move while. The dimension h between the scraper main body 43 and the lifting receiving surface 33b at that time is assumed to be smaller than the height H of the scraper main body 43 in a state perpendicular to the lifting interlocking member 41. If it does so, even if there is abrasion at the tip of the scraper main body 43 when the scraper main body 43 comes to the crawl receiving surface 33b, the scum S can be always lifted up. As shown in the right part of FIG. 5, the scraper shaft 43a can be attached via a bracket 41b protruding from the chain plate 41a. Further, as shown by a broken line in FIG. 5, the tip of the scraper main body 43 may not be a continuous plate surface but may have a large number of recessed portions 43b. Although the scraper body 43 is one in FIG. 5, for example, a plurality of scrapers may be divided in the left-right direction.

  FIG. 6 shows a scraper body 43 according to the embodiment shown in FIG. 4 that is not shaped like a plate surface, but is shaped like a dogleg bent bar made of metal or resin. In FIG. 6, a large number of scraper bodies 43 are suspended from a common scraper shaft 43a so as to be able to rotate synchronously. However, the scraper bodies 43 may be individually suspended as shown in FIG. The tip of the scraper main body 43 may be formed in a Y shape as shown in the right column of FIG. 7 so that the scum can be captured more finely.

  In FIG. 4, when the scraper main body 43 reaches the lifting receiving surface 33 b and enters the lifting process, the scraper main body 43 is in a backward-tilted posture with respect to the lifting interlocking member 41, but as shown in FIG. It may be configured such that the swooping-up interlocking material 41 is tilted down to about 70 to 80 degrees later and scraped up as shown in the state of scraping from the lower state where the interlocking member 41 hangs down vertically. Then, during the distance L in which the scraper main body 43 lifts the rake receiving surface 33b from the vertical scraping state, the tip of the scraper main body 43 moves only by a fraction (1/2 to 1/3) of the distance m. Therefore, moisture flows out from the scum during the slow movement, and the subsequent dehydration process is reduced. As shown in the figure, if a plurality of scum removal bars 47f are provided so as to pass between the scraper main bodies 43 and 43 from the front plate 47b of the scum discharge trough 47, the scum will circulate with the scum attached to the scraper main body 43. Such inconveniences are eliminated.

  DESCRIPTION OF SYMBOLS 1 ... Processing tank 3 ... Levitation separation tank 4 ... Supply water 5 ... Levitation guide pipe 9 ... Separation water tank 15 ... Air dissolution apparatus 17 ... Air supply source 18 ... Air refinement part 32 ... Scraper 33 ... Raising guide 33a ... Upper end 33b ... Screw receiving surface 41 ... Screw interlocking member 43 ... Scraper body 47 ... Scum discharge trough 50 ... Screw 60 ... Discharge chute.

Claims (1)

A rectangular three-dimensional frame having a rectangular bottom wall and front, rear, left and right elevation walls that rise from each of the four sides of the bottom wall is formed, and a partition plate is raised at a position in front of the front vertical wall. A scum-containing sewage and air-dissolved water are introduced into the tank so as to maintain a certain level of water surface, and the scum can float on the water surface from the introduced water. An inclined lower end is located corresponding to the surface of the water in the separation tank, the inclined lower end is located at the upper end of the partition plate, and the upper end is inclined to extend from the upper end of the partition plate to the outside of the floating separation tank. A scum discharge guide, a scum discharge trough disposed outside the floating separation tank via the upper end of the rake guide, and a scum discharge trough provided in the scum discharge trough and provided with a dehydrating function and provided rotatably. Came up with a screw A scraper adapted to drive the cam toward the scum discharge trough and to be driven by a single drive source in conjunction with the screw. A front shaft located on the upper side, a rear shaft located on the water surface with the rear elevation wall, and an intermediate shaft disposed between the front shaft and the rear shaft, and both left and right ends of each shaft A pair of left and right rake-up interlocking members are hung through a sprocket provided on the base plate, and a plurality of scraper main bodies that circulate from the water surface through the rake guide are attached to these rake-up interlock members. flotation a above formula scum separation processing unit, said intermediate shaft and the intermediate sprocket, is its base with formed into bars bent shape of the wanted bend direction raked tip to掻揚interlocking member Multiple scraper bodies mounted so as to be able to rotate rearward are slanted vertically until the tip of the scraping guide reaches the tip of the scraper. The relative angle is gradually opened and the tip is placed on the lifting guide while being tilted back to within the range of 70 to 80 degrees. A pressure levitation type scum separation processing device, which is disposed near the upper side in the middle of the inclination direction of the lifting guide so as to perform a lifting operation with the tip on the lifting surface .

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