JP4275658B2 - Solid-liquid separation device and solid-liquid separation method - Google Patents

Description

  The present invention relates to a solid-liquid separation device and a solid-liquid separation method for separating a liquid substance and a solid substance from a mixture.

As this type of solid-liquid separation device, for example, as shown in Patent Document 1 below, a filtration unit in which the mixture is supplied to the surface, and a pressurizing unit applied to the surface of the filtration unit. There is known a configuration in which a pressure unit and a recovery unit that recovers the liquid substance are provided on the back side of the filtration unit. Furthermore, the pressurizing means of this document 1 includes a pressurizing plate in which a plurality of through-holes are formed, and a surface on which these through-holes open contacts and pressurizes the mixture. A pressure fluid is passed through the through-hole in a state where it is in contact with the mixture, whereby the mixture is pressurized with the pressure plate and the pressure fluid.
As described above, the mixture is pressurized by both the pressure plate and the pressure fluid, and the liquid substance is squeezed out from the mixture, and at the same time, the mixture is recovered by the recovery means, so that the mixture is liquid. The substance and the solid substance can be separated.
Japanese Patent No. 3311417

  By the way, in the conventional solid-liquid separation device, when the mixture is pressurized using the pressure plate, the through-hole is opened, and the back surface side that contacts and pressurizes the mixture (hereinafter referred to as “pressure region”). ), The mixture was simply pressed toward the surface side of the filtration part. At the time of this pressurization, the mixture is more than in the pressurization region in the direction along the surface of the filtration part. There was a risk of being pushed outward or scattered. The mixture thus extruded has a residual amount of liquid substance larger than that located in the pressure region, and the purity of the resulting solid substance varies, thereby improving the purity. There was a problem that was difficult.

  The present invention has been made under such a background, and during pressurization, the mixture is extruded outward from the pressurization region or scattered in the direction along the surface of the filtration part. It is an object of the present invention to provide a solid-liquid separation apparatus and a solid-liquid separation method that can prevent the solid matter from being dispersed and suppress the variation in the purity of the obtained solid substance and improve the purity of the solid substance.

  In order to solve such problems and achieve the above object, the solid-liquid separation device of the present invention is a solid-liquid separation device that separates a liquid substance and a solid substance from a mixture, and the mixing is performed on the surface. A filtration unit to which a body is supplied, a seal means having a seal portion provided in a frame shape or a ring shape, and supported to be movable toward and away from the surface of the filtration unit, and supplied to the surface of the filtration unit Pressurizing means for pressurizing the mixture, and at least a part in the circumferential direction of the seal portion includes a wall portion that pierces the mixture supplied to the surface of the filtration portion in the thickness direction thereof. The mixture supplied to the surface of the filtration part is surrounded by the seal part in a state of being pierced by the wall part, and the enclosed mixture is pressurized by the pressurizing means, That separates solids from solid materials And characterized in that it is a.

  According to this invention, the seal portion having the wall portion is provided, and when the mixture supplied to the surface of the filtration portion is pressurized by the pressurizing means, the mixture is pierced by the wall portion. In the direction along the surface of the filtration part, the mixture is pushed outward or scattered from the inside of the opening surface of the seal part during the pressurization. It becomes possible to prevent. That is, even if the mixture located inside the opening surface of the seal portion is pushed out from the inside of the opening surface by the pressurization, the mixture is prevented from moving by the inner surface of the wall portion. It becomes possible, and it becomes possible to pressurize the mixture located inside the opening surface of the seal portion while being held inside. As a result, not only can the solid-liquid separation efficiency be improved, but also the purity of the obtained solid substance can be suppressed and the purity can be improved.

  By the way, when the mixture has a low viscosity, when the mixture is subjected to, for example, surface pressurization by the opening surface of the seal portion, the mixture is brought outside by the opening surface of the seal portion. With this, the amount of the mixture located inside the opening surface of the seal portion is reduced by pushing the mixture located inside the opening surface to the outside. There is a possibility that the solid-liquid separation efficiency and the purity of the solid substance cannot be improved.

  However, in the present invention, since at least a part of the seal portion in the circumferential direction is the wall portion, the mixture located inside the seal portion may be pushed outward by the opening surface of the seal portion. However, at least the inner surface of the wall portion can prevent the movement, and the amount of the mixture located inside the opening surface is small when being pressurized by the pressing means. It can be surely suppressed.

  Here, the seal part is provided in a frame shape or in an annular shape, and its opening surface can be intimately contacted by pressing the surface of the filtration part or the mixture supplied to the surface over the entire circumference. You may provide the said sealing material.

  In this case, since not only the wall portion but also the sealing material that pressurizes the mixture is provided, when the pressure is applied by the pressurizing means, the mixture is located outside the inside of the opening surface of the seal portion. It is possible to reliably prevent extrusion or scattering. In particular, when the surface of the mixture is pressurized by the sealing material, the liquid substance is squeezed out and solidified, so that the mixture located inside the opening surface when pressurized by the pressure means Even when a force for moving the body toward the outside of the opening surface acts on the body, the solidified portion of the mixture can prevent the movement.

  In addition, you may make it provide the drive means which drives the said sealing material, and the drive means which drives the said wall part each independently. In this case, for example, according to the properties of the mixture, it is possible to vary the surface pressurization by the sealing material and the timing of the piercing by the wall, and the mixture can be changed from the inside of the opening surface of the seal. Can be prevented regardless of the type of the mixture. As a result, even when various types of mixtures are squeezed and ventilated, stable filtration can be performed without scattering the mixture, and solid-liquid separation efficiency can be improved. Thus, it becomes possible to improve the handleability of the solid-liquid separator.

The sealing material may include an outer sealing material and an inner sealing material provided inside the outer sealing material, and the wall portion may be provided between the outer sealing material and the inner sealing material. .
In this case, in the mixture, it is possible to harden both the portion connected to the inside of the wall surface and the portion connected to the outside to the portion pierced by the wall portion by surface pressing with the respective sealing materials. Therefore, the inner surface of the wall portion and the mixture even when a force is applied to the mixture located on the inner side of the opening surface of the seal portion during the pressurization by the pressurizing unit. The movement can be prevented by the solidified portion connected to the inside and outside of the wall portion.

Still further, the wall portion may be provided such that a tip of the wall portion protrudes from the opening surface of the sealing material toward the surface side of the filtration portion.
In this case, even if the drive unit that drives the wall portion and the drive unit that drives the sealing material are not provided independently, if the entire seal portion is moved toward the surface of the filtration portion, The surface is first stabbed into the wall, and then surface pressure is applied by the sealing material. Therefore, particularly when the viscosity of the mixture is low, after the surface of the mixture is pressurized with the sealing material and then pierced by the wall portion, the mixture located inside the opening surface of the sealing material is as described above. However, if the surface is pressed by the sealing material after being pierced by the wall portion, the mixing located on the inner side at the time of pressing the surface may be considered. Even if the body is pushed outward, the movement can be stopped by the inner surface of the wall. From the above, the low-viscosity mixture can be solid-liquid separated with high efficiency without increasing the size of the apparatus.

Furthermore, the sealing material may be formed of a material that is elastically deformed.
In this case, the mixture located inside the opening surface of the sealing material may be pressurized while the sealing material is elastically deformed and brought into close contact with the surface of the filtration part or the mixture supplied to the surface. It becomes possible, and it becomes possible to suppress reliably that the said mixture is extruded to the said outside from the inner side of the opening surface of a sealing material at the time of this pressurization.

Further, the pressurizing means may be configured to pressurize the mixture with a pressure fluid supplied to the inside of the opening surface of the seal portion.
Furthermore, the pressurizing means includes a pressurizing plate in which a plurality of through-holes are formed, and a surface on which the through-holes are open contacts and pressurizes the mixture, and the pressurizing plate is attached to the mixture. The mixture may be configured to pressurize the mixture with the pressure plate and the pressure fluid by allowing the pressure fluid to pass through the through-hole in a contact state.
In these cases, it is possible to reliably improve the solid-liquid separation efficiency and reduce the variation in the purity of the solid substance.

In addition, a recovery means for recovering the separated liquid substance may be provided on the back side of the filtration unit, and the recovery means may be connected to a vacuum suction device.
In this case, the solid-liquid separation efficiency can be further improved.

  Furthermore, a recovery means for recovering the separated liquid substance is provided on the back side of the filtration unit, and the surface of the filtration unit is configured by a filter cloth provided to be able to run substantially horizontally on the apparatus body, A plurality of the recovery means are provided in the traveling direction of the filter cloth under the filter cloth, and are constituted by a vacuum tray connected to a vacuum suction device, and the mixture supplied on the filter cloth is The liquid material is surrounded by the seal portion in a state of being pierced by the wall portion, and is vacuum-sucked through the filter cloth by the vacuum tray while pressurizing the surrounded mixture by the pressurizing means. You may be set as the structure which isolate | separates a solid substance.

In this case, it becomes possible to pressurize the mixture while moving it intermittently or continuously with a filter cloth, and to perform solid-liquid separation, and the solid-liquid separation process in which the purity of the obtained solid substance is improved is highly efficient. Can be implemented.
The wall portion may be provided at least on the front side and the rear side in the traveling direction of the filter cloth.

  In the solid-liquid separation method of the present invention, using the solid-liquid separation device according to any one of claims 1 to 10, the mixture supplied to the surface of the filtration part is pierced by the wall part. In addition to being enclosed and sealed by the seal portion, the enclosed material is pressurized by the pressurizing means to separate the liquid material from the solid material.

Moreover, the solid-liquid separation method of the present invention uses the solid-liquid separation device according to any one of claims 2 to 10 and pierces the wall portion into the mixture supplied to the surface of the filtration portion. The sealing material has an opening face that is in close contact with the surface of the filtration unit or the mixture supplied to the surface over the entire circumference, and surrounds and seals the mixture . The mixture is pressurized by the pressing means to separate the liquid material from the solid material .

  In these cases, not only can the solid-liquid separation efficiency be improved, but also the purity of the obtained solid substance can be suppressed and the purity of the solid substance can be improved. In particular, in the latter solid-liquid separation method, when the mixture is low in viscosity, when the surface is pressurized with the sealing material, the mixture located inside the sealing material will be pushed outward. However, the movement can be blocked by the inner surface of the wall portion. Therefore, even a mixture having a low viscosity can be solid-liquid separated with high efficiency.

  Not only can the solid-liquid separation efficiency be improved, but also the purity of the obtained solid substance can be suppressed and the purity of the solid substance can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In the solid-liquid separation device 10 according to the present embodiment, the filtration unit 11a to which the mixture is supplied to the surface, the sealing means 12 having the frame-like seal unit 12a, and the mixture supplied to the surface of the filtration unit 11a are added. There are provided pressurizing means 13 for pressing, and recovery means 14 provided on the back side of the filtration part 11a for recovering the liquid substance separated from the mixture.

  In this embodiment, the filtration part 11a is comprised by a part of filter cloth 11 provided in the apparatus main body 10a so that a substantially horizontal run is possible. That is, as shown in FIG. 4, the filter cloth 11 is stretched endlessly on a number of guide rolls 15 rotatably provided on the apparatus main body 10a, and is horizontally stretched on the upper side of the apparatus main body 10a. The part (hereinafter referred to as “horizontal part”) constitutes the filtering part 11a.

  A plurality of (four in the illustrated example) recovery means 14 is provided on the back surface side of the filtration unit 11a along the traveling direction F of the filtration unit 11a, and is connected to a vacuum suction device (not shown). Consists of trays A1 to A4. The mixture is a so-called slurry S containing a solid substance in a liquid substance.

  As shown in FIGS. 1 and 2, the upper surfaces of the plurality of vacuum trays A <b> 1 to A <b> 4 each have a central portion in the width direction (direction perpendicular to the traveling direction F) of the cross section as viewed from the traveling direction F of the filtration unit 11 a. The horizontal portion 14b has a substantially V-shape in which inclined portions 14c that rise obliquely upward toward the outside are connected to both ends in the width direction of the horizontal portion 14b. Here, the filtration part 11a is arrange | positioned at the upper surface of vacuum tray A1-A4, and this filtration part 11a is also made into the said substantially V shape so that the upper surface of vacuum tray A1-A4 may be followed.

  As shown in FIG. 1, a plurality of through holes are formed on the horizontal portion 14b side of the horizontal portion 14b and the inclined portion 14c in the upper surface of the vacuum trays A1 to A4. A vacuum suction force acts on the slurry S supplied to the surface of the filtration part 11a through the holes, and the liquid substance from the slurry S is collected in the vacuum trays A1 to A4.

  The plurality of vacuum trays A1 to A4 are independently connected to a control valve (not shown) and a filtrate tank, and each filtrate tank is connected to a vacuum pump and a filtrate pump (not shown). And each vacuum tray A1-A4 can perform a required vacuum pressure and air release operation independently. In addition, the filter cloth 11 on each vacuum tray A1 to A4, that is, the filtration unit 11a, is divided into a cake forming section, a first and second washing section, and a dewatering section.

  Above the filtration unit 11a, as shown in FIG. 4, the slurry supply device 16 supported by the moving frame 10b and the first and second cleaning devices 17a and 17b are connected to each other in a state where they are connected to each other. And reciprocating along the traveling direction F. The slurry supply device 16 supplies the slurry S to the cake forming section, and the cleaning devices 17a and 17b pass through the first and second cleaning sections, respectively, to the second cleaning filtrate (permeate the second cleaning section). Recovered liquid) and fresh cleaning liquid (for example, tap water).

A support member 19 is attached to the lower part of the apparatus main body 10a, and a traveling carriage 18 is disposed on the support member 19 so as to be able to travel along the traveling direction F of the filter portion 11a. The traveling carriage 18 is provided with a clamping cylinder (not shown) that holds the filter cloth 11 located below the vacuum trays A1 to A4 from the thickness direction.
Furthermore, a moving cylinder 20 is suspended from the lower part of the apparatus main body 10a so that the axis extends in the traveling direction F, and one end portion (rear end portion in the traveling direction F) 20a of the moving cylinder 20 is provided. It is connected to the traveling carriage 18.

  As described above, the one end side 20a of the moving cylinder 20 is moved in the direction opposite to the traveling direction F in a state where the holding cylinder holds the filter cloth 11 located below the vacuum trays A1 to A4. Then, the traveling carriage 18 and the filter cloth 11 positioned below the vacuum trays A1 to A4 are caused to travel toward the side opposite to the traveling direction F, and the filtering unit 11a is traveled toward the traveling direction F. It has become so.

  A cleaning pipe 21 is connected to the other end portion (front end portion in the traveling direction F) 20b of the moving cylinder 20, and is obtained at the tip of the cleaning pipe 21 (front end portion in the traveling direction F). A cleaning nozzle 22 for cleaning the filter cloth 11 after the solid material is peeled off is provided surrounded by a cover 23 for preventing scattering of the cleaning water.

  In the solid-liquid separation device 10 of the present embodiment, above the filtration unit 11a, the second cleaning liquid supply means 17b is located in front of the traveling direction F (in the illustrated example, at the front end in the traveling direction F). The pressurizing means 13 and the sealing means 12 are arranged at the arrangement position of the vacuum tray A4. Note that the pressurizing means 13 and the sealing means 12 are arranged at the same position in the traveling direction F of the filtration part 11a, and can simultaneously act on the same slurry S on the surface of the filtration part 11a. ing.

  As shown in FIGS. 1 to 3, the pressurizing means 13 includes a main body portion 13a having a rectangular shape in plan view, and a flat vent plate disposed on the lower surface side of the main body portion 13a facing the surface of the filtration portion 11a. 13b, a pressurizing means driving portion 13c that supports the main body portion 13a and the ventilation plate 13b so as to be able to advance and retreat toward the surface of the filtration portion 11a, and a pressure fluid supply means (not shown) that supplies the main body portion 13a with a pressure fluid. It has been.

  As shown in FIG. 2, openings 13e and 13f that open to the surface of the filtration part 11a are provided on the lower surface of the main body part 13a. A plurality of openings 13e and 13f of the present embodiment are provided, and a main opening 13e that opens at the center in the width direction on the surface of the filtration part 11a and a sub-opening 13f that opens at both ends in the width direction on the surface of the filtration part 11a. , 13f. The insides of these openings 13e and 13f are communicated with the pressure fluid supply means via a pressure fluid supply hole 13h so that the pressure fluid can be supplied. In this embodiment, air is used as the pressure fluid.

  Further, a pressurizing means driving unit 13c is connected to the upper surface of the main body part 13a, and by driving the driving part 13c, the main body part 13a can move forward and backward with respect to the surface of the filtering part 11a together with the ventilation plate 13b. It is like that.

  The ventilation plate 13b is attached to the lower surface of the main body 13a so as to close the openings 13e and 13f. The ventilation plate 13b has a plurality of through holes 13g penetrating in the thickness direction, so that the pressure fluid supplied to the openings 13e and 13f through the pressure fluid supply hole 13h passes therethrough. The slurry S that passes through the hole 13g and contacts the surface of the filtration part 11a is supplied and can be pressurized.

As shown in FIGS. 1 to 3, the sealing means 12 includes a frame-shaped seal portion 12a, a backup plate 12b bonded to the upper surface of the seal portion 12a, and an upper surface of the backup plate 12b. And a seal portion drive means 12c such as a cylinder device that supports the seal portion 12a together with the seal portion 12a so as to be capable of moving forward and backward.
In addition, the seal | sticker part drive means 12c is comprised by another component different from the pressurization means drive part 13c, and is independent of the ventilation board 13b, and seal part 12a is attached to the surface of the filtration part 11a via the backup plate 12b. It is possible to move forward and backward towards.

  Here, at least a part of the seal portion 12a in the present embodiment is a wall portion 12d that pierces the slurry S supplied to the surface of the filtration portion 11a in the thickness direction. The illustrated wall portion 12d is located on the front side and the rear side in the running direction F of the filtration portion 11a in the circumferential direction of the seal portion 12a, and each wall portion 12d extends over substantially the entire width direction of the filtration portion 11a. It is extended. The wall portion 12d is made of, for example, stainless steel.

  Further, the sealing portion 12a has a frame shape, and the sealing material 12e whose opening surface can be brought into close contact with the surface of the filtering portion 11a or the slurry S supplied to the surface over the entire circumference. It has. The sealing material 12e of the present embodiment is formed of, for example, foam rubber, single foam sponge, or urethane, and the surface of a portion corresponding to the inclined portion 14c of the vacuum tray A4 in the filtration portion 11a and the filtration portion 11a. The slurry S supplied to the surface is elastically deformed when it is brought into close contact with the surface pressure.

  Further, the sealing material 12e includes an outer sealing material 12f and an inner sealing material 12g provided inside the outer sealing material 12f, and the wall portion 12d is provided between the outer sealing material 12f and the inner sealing material 12g. It has been. The outer sealing material 12f and the inner sealing material 12g are arranged so that the height positions of the lower surface facing the surface of the filtration portion 11a and the upper surface opposite to the lower surface are substantially equal, and the tip of the wall portion 12d is The outer sealing material 12f and the inner sealing material 12g are positioned so as to protrude downward (on the surface side of the filtration part 11a) from the lower surface. In addition, the thickness (wall thickness) in the direction along the opening surface of the outer sealing material 12f and the inner sealing material 12g is substantially equal, and the wall portion 12d is obtained when the outer sealing material 12f and the inner sealing material 12g are viewed as one body. The tip of the wall 12d is disposed so as to protrude from the lower surface of the sealing material 12e toward the surface of the filtration part 11a.

  The sealing means 12 is provided on the outer peripheral edge of the main body 13 a of the pressurizing means 13. The sealing material 12e is disposed so that the lower surface side protrudes from the lower surface of the main body portion 13a, the backup plate 12b is disposed on the inner side of the main body portion 13a, and the sealing material driving means 12c is disposed on the main body portion 13a. It is arrange | positioned at the upper surface.

  As shown in FIG. 1, the backup plate 12b is disposed so as to cover substantially the entire area of the upper surface of the seal portion 12a including the seal member 12e and the wall portion 12d, and is divided into a plurality of portions in the circumferential direction. In the illustrated backup plate 12b, the front end portion and the rear end portion in the traveling direction F and the both end portions in the direction orthogonal to the traveling direction F are divided into four. That is, by the backup plate 12b at the front end portion, the portion constituting the front end portion in the traveling direction F of the inner and outer sealing materials 12f and 12g and the wall portion 12d positioned at the front end in the traveling direction F are filtered. A portion of the inner and outer sealing materials 12f and 12g constituting the front end portion of the traveling direction F by the backup plate 12b at the rear end portion, and the traveling direction; The wall portion 12d positioned at the rear end of F is moved forward and backward toward the surface of the filtration portion 11a. Further, by the backup plates 12b at the both ends, portions of the inner and outer sealing materials 12f and 12g that constitute both ends in the direction orthogonal to the traveling direction F are moved forward and backward toward the surface of the filtering portion 11a. It is like that.

A plurality of sealing material driving means 12c are provided corresponding to the plurality of divided backup plates 12b, and each of the divided backup plates 12b is separately applied to the surface of the filtration part 11a by these sealing material driving means 12c. Are moved forward and backward independently of each other.
As a result, the seal portion 12a surface pressurizes the surface of the filtration portion 11a located at the portion corresponding to the inclined portion 14c of the vacuum tray A4 (among the inner and outer seal materials 12f and 12g, in the traveling direction F). A portion constituting both end portions) and a portion for pressing and piercing the slurry S supplied to the surface of the filtration portion 11a (the front end portion in the direction orthogonal to the traveling direction F of the inner and outer sealing materials 12f and 12g) The forward drive force can be made different between the portion constituting the rear end portion and the wall portion 12d) located at the front end and the rear end in the traveling direction F.

  Here, in the plan view of the sealing means 12 and the pressurizing means 13, the inner peripheral edge shape of the inner sealing material 12g of the seal portion 12a is substantially the same as the outer peripheral edge shape of the vent plate 13b of the pressurizing means 13. In this state, there is substantially no gap between the inner and outer peripheral edges. That is, in this embodiment, at least a part of the outer peripheral portion of the ventilation plate 13b bites into the inner peripheral surface of the inner sealing material 12g.

  When the seal portion 12a is moved forward, the both end portions of the lower surface of the outer seal material 12f are connected to the upper surface of the inclined portion 14c of the vacuum tray A4 via the filter cloth 11, as shown in FIG. The both end portions of the lower surface of the inner sealing material 12g extend in the traveling direction F and extend in the traveling direction F at a portion of the slurry S located in contact with the inclined portion 14c. It is getting closer.

  Further, of the lower surfaces of the outer sealing material 12f and the inner sealing material 12g, the portions located on the front side and the rear side in the traveling direction F are spread over the entire area in the width direction of the slurry S as shown in FIG. The tip of the wall portion 12d protrudes toward the surface of the filtering portion 11a from between the outer sealing material 12f and the inner sealing material 12g, and the outer and inner seals of the slurry S on the filtering portion 11a. The parts 12f and 12g are pierced between the parts whose surfaces are pressed by the front end part and the rear end part.

Next, a method for separating the slurry S into a liquid substance and a solid substance by the solid-liquid separation apparatus 10 configured as described above will be described.
First, after stopping the vacuum suction to each of the vacuum trays A1 to A4, the one end portion 20a of the moving cylinder 20 is placed in a state where the filter cloth 11 located below the vacuum trays A1 to A4 is sandwiched by the sandwiching cylinder. It is moved by a predetermined distance in the direction opposite to the traveling direction F. Accordingly, the filter cloth 11 positioned below the vacuum trays A1 to A4 is moved toward the opposite side of the traveling direction F, and the filtering unit 11a is moved by a predetermined distance toward the traveling direction F.

  Next, vacuum suction of the vacuum trays A1 to A4 is started. At this time, the slurry S is uniformly supplied to the cake forming section on the upper surface of the vacuum tray A1 by the slurry supply device 16, and the first and second cleaning devices 17a and 17b are used to supply the first and second surfaces of the vacuum trays A2 and A3. The second washing filtrate and fresh washing liquid are uniformly sprayed in the second washing section, respectively, and the cake-like slurry S formed in the first and second washing sections is washed, while the washing nozzle 22 Washing water is supplied to the filter cloth 11 to wash the filter cloth 11. In the dewatering section, dehydration and drying are performed by vacuum suction of the washed slurry S.

  As described above, the filter unit 11a is intermittently moved by a predetermined distance in the traveling direction F by the sandwiching cylinder and the moving cylinder 20, and the slurry S is supplied to the surface of the filter unit 11a by the slurry supply device 16 and vacuumed. After the cake-like slurry S is obtained, the slurry S is supplied to the slurry S by the first and second cleaning devices 17a and 17b and sucked in vacuum, and further washed. The slurry S is dehydrated and dried by vacuum suction, and is removed from the filter cloth 11 by a scraper (not shown) as a solid substance and collected.

  Here, in this embodiment, the filter cloth 11 is stopped when the second cleaning filtrate and the slurry S supplied with the cleaning liquid are vacuum-sucked in the vacuum tray A4 located at the most distal portion in the traveling direction F. In this state, the pressurizing means driving part 13c of the pressurizing means 13 is moved forward toward the surface of the filtering part 11a, and the main body part 13c is moved forward together with the ventilation plate 13b toward the surface of the filtering part 11a.

At the same time, the sealing material driving means 12c of the sealing means 12 is driven forward toward the surface of the filtration part 11a, the seal part 12a is moved forward toward the surface of the filtration part 11a via the backup plate 12b, and the wall With the tip of the portion 12d pierced into the slurry S, the lower surfaces of the inner and outer sealing materials 12f and 12g are placed on the surface of the filtration portion 11a located at the portion corresponding to the inclined portion 14c of the vacuum tray A4, and the surface. The supplied slurry S is brought into close contact with the surface pressure. At this time, the lower surfaces of the front and rear end portions of the inner and outer sealing materials 12f and 12g are portions of the slurry S that are continuous with the front side and the rear side in the traveling direction F at the portion pierced by the wall portion 12d. Apply pressure to the surface and close. Further, both the inner and outer sealing materials 12f and 12g are compressed and deformed in the elastic region in the advance / retreat direction over the entire circumference.
As described above, the lower surfaces of the sealing materials 12f and 12g are brought into close contact with the surface of the filtration unit 11a and the slurry S supplied to the surface by pressing the surfaces thereof, and at the same time, the lower surface of the ventilation plate 13b is bonded to the sealing unit 12a. In contact with the sealed slurry S.

  Then, in a state where the surrounding of the slurry S by the seal portion 12a is maintained, the pressure fluid supply means is operated to supply the pressure fluid to the openings 13e through the pressure fluid supply holes 13h formed in the main body portion 13a. 13f. As a result, the inside of the openings 13e and 13f of the main body 13a is blocked by the ventilation plate 13b and the slurry S, and the internal pressure increases. Then, the increased internal pressure and the pressure fluid supplied to the openings 13e and 13f act on the slurry S through the through holes 13g formed in the ventilation plate 13b.

  As described above, the slurry S located inside the opening surface of the seal portion 12a is pressurized by the pressure fluid supplied into the openings 13e and 13f. At this time, by vacuuming the lower surface side of the filtration part 11a with the vacuum tray A4, the liquid material extruded from the slurry S is collected in the vacuum tray A4, and the slurry S is turned into a solid material and a liquid material. To be separated.

  As described above, according to the solid-liquid separation device 10 according to the present embodiment, the seal portion 12a having the wall portion 12d is provided, and when the slurry S supplied to the surface of the filtration portion 11a is pressurized by the pressurizing means 13. Since the slurry S is surrounded by the seal portion 12a while being pierced by the wall portion 12d, the slurry S is applied from the inside of the opening surface of the seal portion 12a in the direction along the surface of the filtration portion 11a during the pressurization. It is possible to prevent the material from being pushed outward or scattered.

  That is, even if the slurry S located inside the opening surface of the seal portion 12a is pushed out from the inside of the opening surface by the pressurization, the movement is prevented by the inner surface of the wall portion 12d. It becomes possible, and it becomes possible to pressurize the slurry S located inside the opening surface of the seal portion 12a while being kept inside. As a result, not only can the solid-liquid separation efficiency be improved, but also the purity of the obtained solid substance can be suppressed and the purity of the solid substance can be improved.

  By the way, when the slurry S has a low viscosity, as in the above-described embodiment, the slurry S is surface-pressed by the lower surfaces (opening surfaces of the seal portion 12a) of the outer and inner sealing materials 12f and 12g. Then, the slurry S is pushed outward by the lower surfaces of the sealing materials 12f and 12g, and the slurry S located inside the inner sealing material 12g is also pushed outward, thereby the inner side. There is a possibility that the amount of the slurry S located inside the sealing material 12g becomes small, and it becomes impossible to improve the solid-liquid separation efficiency and the purity of the solid substance.

  However, in the solid-liquid separation device 10 of the present embodiment, since the seal portion 12a having the wall portion 12d is provided, the slurry S positioned inside the outer and inner seal materials 12f and 12g is removed by the lower surface. Even if it is pushed out, the movement of the wall portion 12d can be prevented by the inner surface of the wall portion 12d. It can be surely suppressed that it becomes small.

  In particular, in the present embodiment, the both end portions of the filtering portion 11a are inclined portions 14c that rise obliquely upward toward the outside, and the wall portion 12d includes a front end portion and a rear portion in the traveling direction F of the seal portion 12a. Since it is provided at the end and extends over the entire length in the width direction of the filtration part 11a, when the slurry S is pressurized by the pressurizing means 13, it is outward from the inside of the opening surface of the seal part 13a. It is possible to reliably suppress the slurry S from being extruded toward the front.

  Further, since the sealing portion 12a includes not only the wall portion 12d but also the sealing materials 12f and 12g, the slurry S is outside the inside of the opening surface of the sealing portion 12a when being pressurized by the pressurizing means 13. It is possible to reliably prevent extrusion or scattering. In particular, the portion of the surface of the slurry S that is surface-pressed by the sealing materials 12f and 12g is squeezed and solidified, so that when the pressurizing means 13 pressurizes it, Even when a force for moving the slurry S located outward is applied to the slurry S, the solidified portion of the slurry S can prevent the movement.

  Further, since the sealing material 12a includes the outer sealing material 12f and the inner sealing material 12g, and the wall portion 12d is provided between the outer sealing material 12f and the inner sealing material 12g, in the slurry S, the wall portion 12d Both the portion connected to the inside of the wall surface 12d and the portion connected to the outside of the pierced portion can be hardened as described above by surface pressing with the respective sealing materials 12f and 12g. Therefore, even when a force for moving the slurry S located on the inner side of the opening surface of the seal portion 12a is applied to the slurry S at the time of pressurization by the pressurizing means 13, the inner surface of the wall portion 12d and the slurry S are applied. The movement can be prevented by the hardened portions that are connected to the inside and the outside of the wall portion 12d.

  Furthermore, the wall portion 12d is provided with a tip projecting from the opening surfaces of the inner and outer sealing materials 12f, 12g toward the surface side of the filtration portion 11a, and therefore a drive portion for driving the wall portion 12d. If the entire seal portion 12a is moved toward the surface of the filtration portion 11a without providing the drive portions for driving the seal materials 12f and 12g independently, the surface of the slurry S is first the wall portion 12d. Then, surface pressure is applied by the sealing materials 12f and 12g.

  Therefore, when the slurry S has a low viscosity, when the surface pressure is applied by the sealing materials 12f and 12g and then the slurry S is pierced by the wall portion 12d, the slurry S located inside the opening surfaces of the sealing materials 12f and 12g. However, when the surface is pressed by the sealing materials 12f and 12g after being pierced by the wall portion 12d, the surface pressure may be increased. Sometimes, even if the slurry S located inside is about to be pushed outward, the movement can be blocked by the inner surface of the wall 12d. As described above, the low-viscosity slurry S can be solid-liquid separated with high efficiency without making the apparatus large.

  Further, since each of the sealing materials 12f and 12g is formed of a material that is elastically deformed, the sealing materials 12f and 12g are elastically deformed on the surface of the filtration part 11a or the slurry S supplied to the surface. In this state, it is possible to pressurize the slurry S located inside the opening surfaces of the sealing materials 12f and 12g. At the time of pressurization, the slurry S is applied to the opening surfaces of the sealing materials 12f and 12g. It is possible to reliably suppress extrusion or the like from the inside to the outside.

Further, a recovery means 14 for recovering the separated liquid substance is provided on the back surface side of the filtration part 11a, and the recovery means 14 is connected to a vacuum suction device, so that the solid-liquid separation efficiency is further improved. be able to.
In particular, in the present embodiment, a recovery means 14 for recovering the separated liquid substance is provided on the back side of the filtration part 11a, and the surface of the filtration part 11a is provided on the apparatus main body 10a so as to be able to run substantially horizontally. A plurality of collection means 14 are provided under the filter cloth 11 in the traveling direction F of the filter cloth 11 and are constituted by vacuum trays A1 to A4 connected to a vacuum suction device (not shown). The slurry S supplied on the cloth 11 is surrounded by the seal part 12a while being pierced by the wall part 12d, and is vacuumed through the filter cloth 11 by the vacuum trays A1 to A4 while being pressurized by the pressurizing means 13. Since the liquid substance and the solid substance are separated from each other by suction (hereinafter referred to as “the structure of the horizontal vacuum filter”), the slurry S is intermittently separated by the filter cloth 11. Pressurized while moving, it is possible to solid-liquid separation, can be purity of the obtained solid material performs the processing of enhanced solid-liquid separation at a high efficiency.

  Further, since the seal portion 12a is supported so as to be able to advance and retreat toward the surface of the filtration portion 11a independently of each other in a plurality of regions divided in the circumferential direction, In the present embodiment, the portion that presses the surface of the filtration portion 11a located at the portion corresponding to the inclined portion 14c of the vacuum tray A4 (the width of the inner and outer sealing materials 12f and 12g perpendicular to the traveling direction F). Part of both ends in the direction) and the part that pressurizes and stabs the slurry S supplied to the surface of the filtration part 11a (the front end part and the rear part in the traveling direction F of the inner and outer sealing materials 12f and 12g) The forward drive force can be made different between the portion constituting the end portion and the wall portion 12d located at the front end and the rear end in the traveling direction F.

  Therefore, according to the properties of the slurry S supplied to the surface of the filtration part 11a, the forward drive force is varied for each circumferential position of the seal part 12a, so that the slurry S can be applied during pressurization by the pressurizing means 13. Can be reliably suppressed from being pushed outward from the inside of the opening surface of the seal portion 12a.

  Further, the sealing material driving means 12c is constituted by another component different from the pressurizing means driving portion 13c, and is located in a portion corresponding to the inclined portion 14c of the vacuum tray A4 independently of the ventilation plate 13b. Since the surface of the filtration part 11a and the slurry S supplied to the surface can be pressed by the seal part 12a, for example, depending on the properties of the slurry S supplied to the surface of the filtration part 11a Thus, it is possible to appropriately change the surface pressure load of the ventilation plate 13b and the seal portion 12a toward the surface of the filtration portion 11a.

  As described above, when the slurry S is pressurized by the pressurizing unit 13, the slurry S can be prevented from being pushed out or scattered regardless of the type of the slurry S. As a result, even when various types of slurry S are squeezed and ventilated, stable filtration can be performed without scattering the slurry S, and the solid-liquid separation efficiency can be improved. The handling property of the solid-liquid separator 10 can be improved.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the said embodiment, although the structure which has the sealing materials 12f and 12g and the wall part 12d was shown as the seal part 11a, it replaces with this and only the wall part 12d as shown in FIG. You may make it comprise. Moreover, although the structure provided with the inner side sealing material 12f and the outer side sealing material 12g was shown as a sealing material, even if it employ | adopts the sealing material 12h which integrated these 12f and 12g as shown in FIG. 6 and FIG. Good. In this case, as shown in FIG. 6B, the wall portion 12d may protrude from the inner peripheral surface side of the sealing material 12h toward the surface of the filtration portion 11a, or as shown in FIG. 7B. In this way, the sealing material 12h may be provided so as to protrude from the outer peripheral surface side toward the surface of the filtration part 11a.

  Moreover, in the said embodiment, although the structure of the said horizontal type vacuum filter was shown as the solid-liquid separation apparatus 10, it replaces with this and the filtration part 11a with which the surface is fixed and it is not supported so that driving | running | working is possible. A configuration having 12 and pressurizing means 13 may be adopted. Furthermore, a recovery means 14 connected to the vacuum suction device may be provided in this configuration (hereinafter referred to as “another embodiment”). According to the other embodiment, the slurry S supplied to the surface of the filtration part 11a is stabbed by the wall part 12d and is surrounded by the seal part 12a, and is pressurized by the pressure fluid while being vacuum-sucked by the recovery means 14. And may be separated into solid and liquid.

Moreover, in the said other embodiment, you may use the ventilation board 13b as a pressurization board which pressurizes the slurry S supplied to the surface of the filtration part 11a. That is, when the pressurizing means driving unit 13c is driven forward with respect to the surface of the filtering unit 11a, the pressure is maintained by pressurizing the slurry S on the surface of the filtering unit 11a by the lower surface of the vent plate 13b. In the state, the slurry S may be pressurized with the pressure fluid. In this case, the solid-liquid separation efficiency and the purity of the solid substance can be improved more reliably. Furthermore, the slurry S may be pressurized using only a pressure plate instead of the ventilation plate 13b without performing pressurization with a pressure fluid.
Furthermore, in the embodiment as the horizontal vacuum filter, the ventilation plate 13b may be used as the pressure plate, and the slurry S may be pressurized together with the pressure fluid as in the other embodiments. You may make it pressurize the slurry S only by.

  Further, in the embodiment and the other embodiments, after the slurry S supplied to the surface of the filtration part 11a is vacuum-sucked by the recovery means 14, at least the pressure fluid and the ventilation plate 13b as the pressure plate You may make it pressurize by one side. Further, the pressure applied to the slurry S by the pressure fluid or the pressure plate may be increased stepwise over time. In the case of the embodiment as the configuration of the horizontal vacuum filter, the pressure is increased stepwise over time in the slurry S located at the same position by stopping the traveling of the filtration part 11a. It shall be done for.

  Furthermore, when the pressurizing means 13 of the embodiment and the other embodiments includes the vent plate 13b and is configured to pressurize the slurry S with at least the pressure fluid, the pressurizing means 13 causes the slurry. After pressurizing S, when the pressurizing means 13 is moved backward with respect to the surface of the filtration part 11a, or while moving backward, the pressure fluid is supplied to the slurry adhered to the surface of the ventilation plate 13b. S or the like may be blown away to clean the surface of the ventilation plate 13b.

In the said embodiment, although the structure which moves the filter cloth 11 intermittently to the said running direction F was shown, you may move continuously. Furthermore, although the vacuum trays A1 to A4 are shown as the recovery means 14, it is not limited to this.
Furthermore, in the embodiment, air is used as the pressure fluid, but a liquid such as water or a cleaning liquid may be used. Moreover, you may employ | adopt the solid-liquid separation apparatus 10 which does not have the ventilation board 13b.

  Further, driving means for driving the sealing materials 12f and 12g and driving means for driving the wall portion 12d may be provided independently. In this case, for example, according to the properties of the slurry S, the surface pressurization by the sealing materials 12f and 12g and the timing of the piercing by the wall 12d can be arbitrarily changed. It is possible to prevent the slurry S from being pushed outward from the inside of the opening surface of 12a regardless of the type of the slurry S.

  At the time of pressurization, it becomes possible to prevent the mixture from being extruded or scattered outside the pressurization region in the direction along the surface of the filtration part, and the purity of the obtained solid substance is It is possible to suppress variation and improve the purity of the solid substance.

It is the principal part schematic of the solid-liquid separator shown as 1st Embodiment of this invention. In the solid-liquid separator of FIG. 1, it is the cross-sectional top view seen from the running direction of the filter cloth. In the solid-liquid separator of FIG. 1, it is the cross-sectional top view seen from the direction orthogonal to the running direction of a filter cloth. It is the whole solid-liquid separator shown as one embodiment of the present invention. It is the principal part schematic of the solid-liquid separator shown as 2nd Embodiment of this invention, Comprising: (a) The cross-sectional top view seen from the running direction of the filter cloth, (b) The direction orthogonal to the running direction of the filter cloth It is the cross-sectional top view seen from. It is the principal part schematic of the solid-liquid separator shown as 3rd Embodiment of this invention, Comprising: (a) The cross-sectional top view seen from the running direction of the filter cloth, (b) The direction orthogonal to the running direction of the filter cloth It is the cross-sectional top view seen from. It is the principal part schematic of the solid-liquid separator shown as 4th Embodiment of this invention, Comprising: (a) The cross-sectional top view seen from the running direction of the filter cloth, (b) The direction orthogonal to the running direction of the filter cloth It is the cross-sectional top view seen from.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Solid-liquid separator 10a Apparatus main body 11 Filter cloth 11a Filter part 12 Sealing means 12a Seal part 12d Wall part 12e, 12h Sealing material 12f Outer sealing material 12g Inner sealing material 13 Pressurizing means 13b Ventilation plate (pressurizing plate)
14 Collecting means A1 to A4 Vacuum tray F Running direction S Slurry (mixture)

Claims (12)

A solid-liquid separator for separating a liquid substance and a solid substance from a mixture,
A filtration part to which the mixture is supplied on the surface, a sealing means that is supported so as to be able to advance and retreat toward the surface of the filtration part, and has a seal part provided in a frame shape or in an annular shape, and the surface of the filtration part Pressurizing means for pressurizing the mixture supplied to
The seal portion is a wall portion at least a part of which is circumferentially pierced in the thickness direction of the mixture supplied to the surface of the filtration portion.
The mixture supplied to the surface of the filtration part is surrounded by the seal part in a state where the mixture is pierced by the wall part, and the enclosed mixture is pressurized by the pressurizing means to form a liquid substance and a solid A solid-liquid separation device characterized in that it is configured to separate a substance. The solid-liquid separator according to claim 1,
The seal portion is provided in a frame shape or in an annular shape, and the opening surface thereof can be brought into close contact with the surface of the filtration portion or the mixture supplied to the surface over the entire circumference. A solid-liquid separator comprising a sealing material. The solid-liquid separator according to claim 2,
The sealing material includes an outer sealing material and an inner sealing material provided inside the outer sealing material, and the wall portion is provided between the outer sealing material and the inner sealing material. Solid-liquid separator. In the solid-liquid separation device according to claim 2 or 3,
The wall part is provided with a tip projecting from the opening surface of the sealing material toward the surface side of the filtration part. The solid-liquid separator according to any one of claims 2 to 4,
The sealing material is formed of a material that is elastically deformed. In the solid-liquid separation device according to any one of claims 1 to 5,
The solid-liquid separation device, wherein the pressurizing means is configured to pressurize the mixture with a pressure fluid supplied to the inside of the opening surface of the seal portion. The solid-liquid separator according to claim 6,
The pressurizing means includes a pressure plate in which a plurality of through holes are formed, and a surface on which the through holes are open contacts and pressurizes the mixture, and the pressure plate is brought into contact with the mixture. The solid-liquid separation device is configured to pressurize the mixture with the pressure plate and the pressure fluid by allowing the pressure fluid to pass through the through-hole in a state where the pressure is applied. In the solid-liquid separation device according to any one of claims 1 to 7,
A solid-liquid separation device characterized in that a recovery means for recovering the separated liquid substance is provided on the back side of the filtration unit, and the recovery means is connected to a vacuum suction device. The solid-liquid separator according to claim 8,
The surface of the filtration part is constituted by a filter cloth provided on the apparatus main body so as to be able to run substantially horizontally, and a plurality of the recovery means are provided below the filter cloth in the running direction of the filter cloth, and a vacuum suction device Consists of vacuum trays connected to
The vacuum tray is closed while the mixture supplied on the filter cloth is surrounded by the seal portion while being pierced by the wall portion, and the pressurized mixture is pressurized by the pressure means. The solid-liquid separator is characterized in that the liquid substance and the solid substance are separated by vacuum suction through the filter cloth. The solid-liquid separator according to claim 9, wherein
The wall portion is provided at least on the front side and the rear side in the traveling direction of the filter cloth.   Using the solid-liquid separation device according to any one of claims 1 to 10, the mixture supplied to the surface of the filtration part is surrounded and sealed by the seal part while being pierced by the wall part. In addition, the solid-liquid separation method is characterized by separating the liquid substance from the solid substance by pressurizing the enclosed mixture by the pressurizing means. Using the solid-liquid separation device according to any one of claims 2 to 10, after the wall portion is pierced into the mixture supplied to the surface of the filtration portion, the opening surface of the sealing material is arranged around the entire circumference. In close contact with the surface of the filtration part or the mixture supplied to the surface, the mixture is surrounded and sealed , and the enclosed mixture is pressurized by the pressurizing means. And separating the liquid material from the solid material .

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