JP2013184082A - Solid-liquid separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separator that ensures a large scraping-up force and conveying force and achieves improvement of a liquid removal function by widening a clearance between front and rear rotating plates in each slit in a solid-liquid separator configured to allow liquid in a treated object to drip down through each slit in the front and rear direction formed between right and left guide members.SOLUTION: A solid-liquid separator is configured to allow liquid in a treated object to drip down through each slit in the front-back direction formed between right and left guide members. The solid-liquid separator has the following configuration. A rotary shaft 17 is located on the center side of the side surface of each of a plurality of juxtaposed rotating plates 18 arranged front and back in each slit. The rotating plate 18 has three tops 18a and three sides 18b connecting between the tops 18a. The respective three sides 18b are formed into a concave curved shape toward the center.

Description

  The present invention relates to a solid-liquid separation device that separates a processed product in which a solid and a liquid are mixed into a solid and a liquid.

  A feed unit is configured by arranging a plurality of rotating plates that are rotationally driven by a rotation shaft in the left-right direction in a straight line in the front-rear direction in plan view, and three or more feed units are arranged side by side in the left-right direction and are adjacent on the left and right A guide member in the front-rear direction is provided between the feeding units, and a guide surface of the workpiece is formed on the upper surface of the guide member. A solid-liquid separation apparatus shown in Patent Document 1 is known in which a liquid in a mixed processed material is dropped from a long and narrow slit formed between adjacent guide members on the left and right sides, and the processed material is sequentially forwarded. It has become.

Japanese Patent No. 3771515

In the solid-liquid separation device of the above document, each rotary plate is formed into an elliptical shape, and the spacing between adjacent rotary plates in the front and rear is arranged close to the extent that the rotation trajectory wraps, thereby providing a large scraping force. In addition, the conveyance force is secured.
However, during the rotation of the rotating plate, the gap between the rotating plates adjacent to each other in the slit in the slit becomes narrow due to the shape of the rotating plate, and as a result, a large liquid removal performance may not be ensured.

  The present invention secures a large scraping force and conveying force in a solid-liquid separation device that leaks the liquid in the processed material from the slit in the front-rear direction formed between the left and right guide members. An object of the present invention is to provide a solid-liquid separation device having an improved liquid removal function by widening the gap between the front and rear rotating plates.

  In order to solve the above-mentioned problem, first, the feed unit 14 is configured by arranging a plurality of rotary plates 18 that are rotationally driven by the rotary shaft 17 in the left-right direction in a straight line in the front-rear direction in plan view. Are arranged side by side in the left-right direction, a guide member 12 in the front-rear direction is provided between the feeding units 14 adjacent in the left-right direction, and a guide surface 12a of a processed object is formed on the upper surface of the guide member 12, and the guide surface The rotating plate 18 that projects upward from 12a and displaces forward causes the liquid in the processed material mixed with the solid and the liquid to fall from the elongated slit 13 before and after the gap formed between the adjacent guide members 12 on the left and right. In the solid-liquid separator that sequentially feeds the processed material forward, the rotary shaft 17 is positioned on the center side of the side surface of the rotary plate 18, and the rotary plate 18 has three top portions 18a and 18a. And three sides 18b for connecting, and characterized by being formed in a concave curve shape toward the center of each of the three sides 18b.

  Second, the rotating plate 18 is formed so that the distances from the center of the rotating plate 18 to the tops 18a are equal.

  Third, the rotating plate 18 is formed into a three-fold rotationally symmetric shape.

  The fourth feature is that a notch-shaped retracting portion 18c for avoiding interference between the rotating top portions 18a is formed on the back side in the rotational direction of the top portion 18a of the rotating plate 18.

  Fifth, the top 18a side of the rotating plate 18 is formed in an arc shape in a side view.

  Sixth, the phase of each rotary plate 18 of the feed unit 14 is set to be the same.

  Seventh, the upper end surface of the guide member 12 is positioned above the upper surface of the rotating shaft 17.

  Eighth, the lower end surface of the guide member 12 is positioned above the upper surface of the rotating shaft 17.

  Ninth, the guide member 12 is configured such that the lower end surface of the guide member 12 is positioned above the lower end of the rotation locus D of the rotating plate 18.

  Tenth, the guide member 12 is arranged such that the upper ends of the overlapping portions in the side view of the rotation trajectory D of the rotating plates 18 adjacent to each other in front and rear are positioned above the upper surface of the guide member 12. Yes.

  The rotating plate with the rotation axis positioned on the side center side has three apexes and three sides connecting the apexes, and each of the three sides is formed in a concave curve shape toward the center. Even when the adjacent rotating plates are brought close to the extent that the rotation trajectory overlaps, the concave curved side enlarges the gap between the rotating plates adjacent to each other in the slit and drains the liquid. The function can be improved and a large lifting force and conveying force can be maintained.

  In addition, according to the rotating plate formed so that the distance from the center of the rotating plate to each top is equal, or the rotating plate is formed into a three-fold rotationally symmetric shape, in the process of rotating the rotating plate once Since it is possible to carry out the same level of scraping and conveying three times, the processing performance is improved.

  Moreover, according to what formed the notch-shaped evacuation part which avoids interference between the tops in rotation on the back hand side of the rotation direction of the top part of the rotating plate, while ensuring a liquid drainage force of a predetermined level or more, It becomes possible to arrange the rotating plates closer to each other.

  Furthermore, according to the arrangement in which the guide member is arranged such that the upper ends of the overlapping portions in the side view of the rotation trajectory of the rotating plates adjacent to each other in front and back are located above the upper surface of the guide member, And the performance of separating into liquid is further improved.

It is a rear view which shows the structure of the solid-liquid separator to which this invention is applied. It is a side view which shows the structure of the solid-liquid separator to which this invention is applied. It is a side view which shows the structure of a rotating plate. It is a rear view which shows the structure of a rotating plate. It is a side view which shows the operation state in one cycle of the feed unit of the solid-liquid separator of this invention. It is a side view which shows the operation state in one cycle of the feed unit of the solid-liquid separator of a comparative example. It is a characteristic graph which shows a comparison result.

  1 and 2 are a rear view and a side view showing a configuration of a solid-liquid separator to which the present invention is applied. The solid-liquid separator shown in FIG. 1 includes an upper apparatus body 1 and a rectangular box-shaped lower frame 2 that supports the apparatus body 1.

  The upper surface side of the lower frame 2 is opened, and a drainage port 3 is formed on the bottom surface side, and a pair of left and right casters 4 are installed on the front and rear of the lower surface of the lower frame 2, respectively.

  The apparatus main body 1 is configured to convey a processed object toward the front, and is supported by the lower frame 2 so that the entire apparatus main body 1 swings up and down with a rear end portion as a fulcrum. With this support structure, the apparatus main body 1 is configured to be switchable between an operation posture that faces in the front-rear horizontal direction and a maintenance posture that is inclined upward toward the front. In the maintenance posture, the apparatus main body 1 can be inspected and repaired from the lower surface side. On the other hand, in the operation posture, the processing object can be separated into a solid and a liquid (in this example, water). Become.

  The apparatus body 1 includes a pair of left and right side plates 6, 6, a rear plate 7, and a front plate 8 that face each other so as to face each other in parallel to form a rectangular frame 1 a in plan view. The frame 1a is provided with a processing unit 9 for processing a processed product in which a liquid and a solid are mixed.

  The distance between the left and right side plates 6 and 6 is narrower than the left and right width of the lower frame 2, so that the left and right side plates 6 and 6 are closer to the left and right (right in the example shown) right above the lower frame 2. The installation space S in which various members are installed is formed in the left and right other side portions just above the lower frame 2.

  The rear plate 7 is formed in a square shape when viewed from the rear, and its lateral width is set to be substantially the same as that of the lower frame 2 and its vertical height is set to be substantially the same as that of the left and right side plates 6 and 6. . Incidentally, the rear plate 7 and the lower frame 2 are connected to each other via a hinge 11 so as to be pivotable up and down, whereby the apparatus main body 1 is supported by the lower frame 2 so as to be swingable up and down.

  The front plate 8 is formed in a square shape when viewed from the rear, is formed over the entire left and right width of the lower frame 2, and has a vertical height so as to cover the front lower half part between the left and right side plates 6.6. Is set to substantially half of the side plate 6.

  3 and 4 are a side view and a rear view showing the configuration of the rotating plate. The processing section 9 is composed of a large number of front and rear guide bars 12 arranged side by side between the left and right side plates 6 and 6, and a gap space elongated in the front and rear direction formed between the guide bars 12 adjacent in the left and right direction. A feed unit 14 arranged in each slit 13 and a drive mechanism 16 for driving the feed units 13 arranged in the left-right direction are provided.

  Then, the liquid in the processed material leaks into the lower frame 2 from the slit 13 between the guide bars 12, and the processed material is transported forward by the plurality of feed units 14 arranged in parallel on the left and right, thereby removing the processed material. In addition to performing liquid treatment, the processed product that has become separated from the liquid by being separated is discharged from a discharge port described later. Incidentally, the liquid accumulated in the lower frame 2 is discharged from the liquid discharge port 3.

  The feed unit 14 is configured by arranging a plurality (at least three or more) of rotating plates 18 that are driven to rotate about the axis of the rotating shaft 17 in the left-right direction in the front-rear direction.

  A specific configuration will be described. The rotary shaft 17 is supported between the left and right side plates 6 and 6 so as to be rotatable about the axis, and the rotary shaft 17 is arranged in the front-rear direction so as to be parallel to each other. A plurality (seven in the illustrated example) are arranged in parallel, and each rotary shaft 17 is provided with a large number of rotary plates 18 that are linear in the front-rear direction in a plan view when the thickness direction is directed in the left-right direction. Yes.

  Each rotary shaft 17 is rotatably supported around its own axis by a bearing 19 installed in the support holes 6a of the left and right side plates 6 and 6, and one end of the rotary shaft 17 is It protrudes to the installation space S side through the support hole 6a. Incidentally, the plurality of rotating shafts 17 are arranged in parallel in the front-rear direction at equal intervals, and the respective rotating shafts 17 are also set to have the same vertical height.

  A ring-shaped spacer 21 inserted through the rotation shaft 17 is interposed between the rotation plates 18, 18 adjacent to each other on the same rotation shaft 17, and the spacer 21 allows the rotation plates 18 arranged in parallel to the left and right. The intervals are held at equal intervals, and this causes the rotating plates 18 to be disposed at the same left and right positions on each rotating shaft 17, so that the rotating plates 18 are mounted on the rotating shaft 17. It is in a state of being arranged in a straight line in the front-rear direction.

  The feeding unit 14 is configured by the rotating plates 18 arranged in a straight line, and a plurality of rotating plates 18 are mounted on each rotating shaft 17. A large number are arranged in parallel on the left and right.

  The shape of the rotating plate 18 will be described in detail. The rotating plate 18 has three top portions 18a and three sides 18b connected between the top portions 18a in a side view, and each side 18b is a concave curve toward the center side. In other words, the side surface of the rotating plate 18 is formed in the shape of a three-pointed star that is a shape in which each side of the triangle is recessed toward the center. The rotating shaft 17 is located at the center of the side surface of the plate 18.

  The three top portions 18a of the rotating plate 18 have the same distance from the center and are formed in a circular arc shape (convex curve shape) in a side view. Further, the rotating plate 18 has a three-fold rotational symmetry shape (1/3 period). The shape is the same when rotated by a minute. A notch-shaped retracting portion 18c is recessed on the back side in the rotational direction (the rear side in the rotational direction, the upper side in the rotational direction) of each of the three top portions 18a of the rotating plate.

  The interval between the rotating plates 18 arranged in the front-rear direction is set so that the rotation locus D of the rotating plates 18 adjacent to each other in front and back is overlapped in a side view, and all the rotating plates 18 are in the same posture. Are mounted on the corresponding rotary shafts 17 so that the phases of the rotary plates 18 are all the same. For this reason, during rotation, the rotating plates 18 adjacent to each other at the front and rear are adjacent to each other at the tops 18a, but are prevented from interfering with each other by the notch-shaped retracting portion 18c. Can be made closer.

  The guide bar 12 is disposed between the feeding units 14 adjacent to each other on the left and right (between the rotating plates 18). In other words, a plurality of guide bars 12 in the front-rear direction are arranged on the left and right, and the slits 13 between the guide bars 12 adjacent in the left-right direction are arranged side by side from the arrangement configuration in which the guide bars 12 are arranged side by side. A plurality of feed units 14 are arranged in the slit 13.

  Each guide bar 12 has a left and right symmetrical rectangular cross section in which the left and right widths gradually decrease downward, and the upper surface of the guide bar 12 is formed in a horizontal plane extending in the front-rear direction. For this reason, each slit 13 gradually expands in the left-right width toward the lower side, and a flat guide surface 12 a for guiding the processed material is formed on the upper surface of the guide bar 12.

  The guide surfaces 12a of all the guide bars 12 are formed on the same plane, and a single transport surface is formed between the left and right side plates 6 and 6 as a whole. Incidentally, the guide surface 12 a is formed at the same position as the upper end of the front plate 8 or at a slightly higher position than the upper end of the front plate 8. In other words, the space above the transport surface between the left and right side plates 6 and 6 is open at the top and front, and in particular, the front open part separates the liquid and discharges the processed material that has approached the solid. It becomes a discharge port.

  Each guide bar 12 is supported and fixed to the frame 1a of the apparatus main body 1 and is disposed in the vicinity of the upper side of the rotary shaft 17 arranged in parallel in the front-rear direction. With this arrangement, the lower end of the guide bar 12 is slightly higher than the upper surface of the rotating shaft 17, and the upper end of the guide bar 12 is below the upper end of the rotation locus D of the rotating plate 18 and the guide bar 12. Is in a state of being positioned above the lower end of the rotation locus D of the rotating plate 18.

  For this reason, during the rotation of the plurality of rotating plates 18 that are all in the same phase, a part of the peripheral portion of all the rotating plates 18 protrudes upward from the guide surface 12a of the guide bar 12 and is wave-shaped feed that is displaced forward. The workpieces are sequentially fed forward by a feed surface that forms a surface and is displaced forward.

  More specifically, the rotation trajectories D of the rotating plates 18 adjacent to each other overlap as described above, but the upper end of the overlapping portion is located above the upper surface of the guide bar 12, and this configuration Further, the conveying force and the lifting force of the processed material by the rotating plate 18 are further improved. Incidentally, the plurality of left and right rotating shafts 17 arranged in the front-rear direction and the plurality of guide bars 12 arranged in the left-right direction are orthogonal to each other in a lattice shape in plan view.

  The drive mechanism 16 includes a drive motor 22 mounted and fixed on the front surface side of the rear plate 7, a rotary gear 23 mounted and fixed on an end portion of each rotary shaft 17 protruding toward the installation space S, and an installation space S The drive shaft 24 in the front-rear direction disposed on the lower side of the rotation gear 23, a plurality of drive gears 26 mounted on the drive shaft 24 and rotating integrally with the drive shaft 24, and the drive motor 22 to the drive shaft 24. A drive belt 27 for transmitting power is provided, and the plurality of drive gears 26 are always meshed with the corresponding rotary gears 23 respectively.

  The power generated by the drive motor 22 is transmitted in the order of drive belt 27 → drive shaft 24 → drive gear 26 → rotary gear 23 → rotary shaft 17 to rotate each rotary plate 18 in rotation.

  According to the solid-liquid separation device having the above configuration, when the processed material is introduced from the uppermost stream side end (rear end portion) of the transport surface in a state where each rotary plate 18 is driven to rotate, the processed material is rotated forward. The plates are sequentially sent forward by a rotating plate 18 that rotates in a direction (counterclockwise in FIG. 3).

  This will be described by focusing on the adjacent rotating plates 18 in the front and rear. First, the top portion 18a of the rear rotating plate 18 moves forward in an arc shape while protruding upward from the guide surface 12a. Send it forward while scraping.

  Subsequently, after the top portion 18a of the rear rotating plate 18 reaches the uppermost position, the top portion 18a of the rotating plate 18 moves forward in an arc shape while staying on the lower side of the guide surface 12a. The top 18a of the rotary plate 18 moves upward in a circular arc shape while projecting upward from the guide surface 12a. Thus, the front and rear rotary plates 18 and 18 pass each other up and down, so that the front rotary plate 18 is processed. Thereafter, the operation is repeated, and the processing objects are sequentially sent forward.

  In the process of delivering the processed material between the rotary plates 18 and 18, the rotation trajectory D of the rotary plate 18 wraps forward and backward, and the upper end of the wrap portion is positioned above the guide surface 12a. The processed material is efficiently transferred from the rotating plate 18 to the rotating plate 18 on the front side, and the liquid in the processed material falls into the gap between the front and rear rotating plates 18 and 18 in the slit 13.

  In order to efficiently drop the liquid in the slit 13, it becomes a problem how much the lower end (falling port) between the adjacent rotary plates 18 and 18 in the slit 13 is open. Each of the concave curved sides 18b recessed in the center increases the area of the dropping port during rotation, so that the liquid in the processed material can be efficiently leaked from the slit 13. Incidentally, since the left and right widths of the slit 13 gradually increase downward, the liquid can be smoothly dropped to the lower frame 2 side.

  Incidentally, the opening area (filtering area) of the drop opening is the opening length Y that is the distance between the lower ends of the slits 13 of the rotating plates 18 and 18 that are adjacent in the front and rear, and the opening width that is the left and right width at the lower ends of the slits 18. In the example shown in the figure, the opening length Y becomes the maximum opening length Ymax with the top portion 18a of each rotating plate 18 facing directly above, while each rotation In a state where the top portion 18a of the plate 18 faces directly below, the opening length Y becomes the minimum opening length Ymin.

  By the above, it becomes easy to ensure a high conveyance force and scraping force and high liquid removal performance, and it becomes possible to efficiently separate a processed material into a liquid and a solid.

  The shape of the rotating plate 18 is not limited to the shape described above, and the distance from the center portion to the top portion 18a may be different at each top portion 18a, and may not be rotationally symmetric. It is not necessary that all the rotating plates 18 have the same phase. In the example shown in the figure, the top portion 12a is arranged around the axis of the rotating shaft 17 every 1/3 period, but this may be changed as appropriate instead of at regular intervals.

  However, even in this case, it is necessary to set the period of all the rotary bodies 18 to be the same, and the adjacent rotary plates 18 and 18 in the front and rear are determined to be adjacent in one rotation. The parts must be shaped so as not to interfere with each other. For example, when all the rotating plates 18 are set to the same phase, predetermined top portions 18a are close to each other, but the adjacent top portions 18a need to be formed into shapes that do not interfere with each other.

Next, based on FIG. 5 thru | or FIG. 7, the solid-liquid separator of this invention and the conventional solid-liquid separator are compared.
FIG. 5 is a side view showing an operation state in one cycle of the feeding unit of the solid-liquid separation device of the present invention, and FIG. 6 shows an operation state in one cycle of the feeding unit of the solid-liquid separation device of the comparative example. FIG. The feed unit 14 (present invention) shown in FIG. 5 is provided in the solid-liquid separator shown in FIGS. 1 to 4, and the feed unit 14 ′ (comparative example) shown in FIG. 1 is a solid-liquid separator shown in FIG. In the feed unit 14 'shown in FIG. 6, the phases of adjacent rotary plates 18' are shifted by 1/4 turn in the front and rear, and each rotary plate 18 'is formed into an elliptical shape in a side view. Yes.

  Both match the full length distance L, which is the distance from the rearmost rotating shaft 17, 17 'to the foremost rotating shaft 17, 17'. Further, the solid-liquid separator shown in FIG. 5 has seven rotating shafts 17, whereas the solid-liquid separator shown in FIG. 6 has nine rotating shafts 17 ′. . In addition, the rotating plate 18 shown in FIG. 5 is formed in a three-fold rotationally symmetric shape, whereas the rotating plate 18 ′ shown in FIG. 6 is formed in a two-fold rotationally symmetric shape.

  Further, each rotary plate 18 in FIG. 5 has the minimum opening length Ymin at a position rotated by 1/6 turn from the rotation position at which the opening length becomes the maximum opening length Ymax. On the other hand, the rotating plate 18 ′ of FIG. 6 rotates the front rotating plate 18 ′ forward by 30 ° from the horizontal direction and rotates the rear rotating plate 18 ′ forward by 30 ° from the vertical direction. In this state, the opening length becomes the minimum opening length Ymin, and the opening length becomes the maximum opening length Ymax at the position where each rotary plate 18 ′ is rotated by 1/4 turn from the rotation position. Other configurations are basically the same as those in FIG. 5 and FIG.

  For this, the sum of the filtration areas of the plurality of drop openings of one feed unit 14, 14 'is calculated every time the rotary plates 18, 18' are rotated by 1/36 rounds (10 °). Compare the total filtration area.

  FIG. 7 is a characteristic graph showing the comparison results. As shown in the figure, in the present invention, although the change in the total value of the filtration area is more severe than that in the comparative example, the value obtained by integrating the total value of the excess area at each rotational position is shown in FIG. 6 is larger than that shown in FIG. As a result, in the present invention, the filtration area becomes larger during the rotation of the rotating plate 18, and as a result, the liquid can be more efficiently separated from the processed material.

12 Guide bar (guide member)
12a Guide surface 13 Slit 14 Feed unit 17 Rotating shaft 18 Rotating plate 18a Top portion 18b Side 18c Retraction portion D Rotating locus

Claims (10)

  A feed unit (14) is configured by arranging a plurality of rotary plates (18) that are rotationally driven by a rotary shaft (17) in the left-right direction in a straight line in the front-rear direction in plan view, and the feed unit (14) is A guide member (12) in the front-rear direction is provided between the adjacent feed units (14) on the left and right sides, and three or more guide members (12a) are formed on the upper surface of the guide member (12). Then, the rotating plate (18) that protrudes upward from the guide surface (12a) and moves forward moves the liquid in the processed material mixed with the solid between the guide members (12) adjacent on the left and right. In the solid-liquid separation device that sequentially feeds the processed products forward while dropping from the elongated slit (13) before and after formed on the rotating shaft, the rotating shaft (17) is positioned at the center of the side surface of the rotating plate (18) and rotated. Board (18) is 3 The solid-liquid separator has a top (18a) and three sides (18b) that connect the tops (18a), and each of the three sides (18b) is formed in a concave curve shape toward the center. .   The solid-liquid separator according to claim 1, wherein the rotating plate (18) is formed so that the distance from the center of the rotating plate (18) to each top portion (18a) is equal.   The solid-liquid separator according to claim 2, wherein the rotating plate (18) is formed into a three-fold rotationally symmetric shape.   The notch-shaped retracting portion (18c) for avoiding interference between the rotating top portions (18a) is formed on the back side in the rotational direction of the top portion (18a) of the rotating plate (18). The solid-liquid separator according to any one of the above.   The solid-liquid separator according to any one of claims 1 to 4, wherein the top (18a) side of the rotating plate (18) is formed in an arc shape in a side view.   The solid-liquid separator according to any one of claims 1 to 5, wherein the phases of the rotary plates (18) of the feed unit (14) are set to be the same.   The solid-liquid separator according to any one of claims 1 to 6, wherein the upper end surface of the guide member (12) is positioned above the upper surface of the rotating shaft (17).   The solid-liquid separator according to claim 7, wherein the lower end surface of the guide member (12) is positioned above the upper surface of the rotating shaft (17).   The guide member (12) according to any one of claims 1 to 8, wherein the guide member (12) is configured such that a lower end surface of the guide member (12) is positioned above a lower end of a rotation locus (D) of the rotating plate (18). Solid-liquid separator.   The guide member (12) is arranged so that the upper ends of the overlapping portions in the side view of the rotation locus (D) of the rotating plates (18) adjacent in the front-rear direction are located above the upper surface of the guide member (12). The solid-liquid separator according to any one of claims 1 to 9.

Images