JP2009227431A - Transfer device for granular solid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer device for a granular solid which can effectively separate a suspension without deteriorating transfer efficiency when the granular solid is transferred from the suspension containing the granular solid, and is convenient even in a maintenance aspect. <P>SOLUTION: An approximately cylindrical casing 4 is inclined and arranged so that a discharge port 3 side becomes high, a storage hopper 5 for storing the suspension is connected to a throwing port 2 of the casing 4, and a ribbon-like helical impeller 7 having a hollow part 6 formed along an axis is internally installed in the casing 4. Furthermore, an upper end of the helical impeller 7 is only fixed to a drive shaft 9, whereby a lower end is made as a free end without fixing, and a canti-lever structure is formed. A plurality of reinforcement members 12 are fixed to an inner peripheral edge facing an axis hollow part 6 of the helical impeller 7 to apply reinforcement. Furthermore, when the granular solid is pulled up to the discharge port 3 side of an upper end of the casing 4 to be transferred, the suspension associated with the granular solid is made to flow down from the axis hollow part 6 of the helical impeller 7 to effectively be separated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a granular solid material transfer device for separating and transferring a granular solid material from a suspension containing the granular solid material.

Conventionally, as an apparatus for separating and transferring granular solids from a suspension containing various granular solids such as various slurries, sludge water, and muddy water, for example, as shown in Patent Documents 1 to 3, the outlet side is There is one in which a storage hopper for storing suspension is connected to an inlet of a screw conveyor that is inclined so as to be higher. In the above transfer device, various granular solids that settle on the bottom of the storage hopper storing the suspension are pushed up and transferred to the discharge port side obliquely upward by a screw conveyor connected to the bottom of the hopper, At the time of the transfer, a large amount of suspension accompanying the particulate solid is made to flow down from the clearance between the outer peripheral edge of the screw blade and the inner wall of the casing of the conveyor to be drained and separated.
JP-A-6-11125 JP 2000-317694 A Japanese Utility Model Publication No. 3-30332

  By the way, depending on the use of granular solids and suspension, etc., it may be required to separate them as much as possible. It may be possible to gain a lot of time for the turbid liquid to flow down, or to adjust the clearance between the blade outer peripheral edge and the casing inner wall so that the suspension can easily flow down. Adjustment is not necessarily preferable because it causes a decrease in the transfer efficiency of the granular solid. In addition, since the lower bearing portion of the screw conveyor that is inclined is immersed in the suspension and constantly exposed to the suspension, high sealability is required to prevent leakage of the suspension. There is also a maintenance problem that the wear of the bearing or the like is extremely accelerated due to the intrusion of the granular solid into the part. In addition, although the transfer device of Patent Document 3 is designed to prevent intrusion of granular solids by supplying pressurized liquid into the housing of the lower bearing portion, there is a concern that the structure becomes complicated and the cost increases. In addition, it is considered that it is difficult to completely prevent the intrusion of the particulate solid because the bearing is still unchanged in that it is exposed to the suspension.

  In view of the above points, the present invention can effectively separate a suspension without lowering the transfer efficiency when transferring a granular solid from a suspension containing the granular solid, and is also suitable in terms of maintenance. It is an object of the present invention to provide a granular solid material transfer device.

  In order to solve the above problems, the granular solids transfer device according to the present invention is a granular solids transfer device that separates and transfers granular solids from a suspension containing the granular solids, and has one end. A substantially cylindrical casing provided with a discharge port at the other end is inclined so that the discharge port side is higher, and a storage hopper for storing suspension is connected to the input port of the casing, Inside the casing is a ribbon-like spiral blade having a hollow portion formed along the shaft center, and the upper end of the spiral blade is penetrated from the upper end side of the casing and fixed to a drive shaft rotatably supported. The lower end portion of the spiral blade is not fixed, and is a free end, and a plurality of reinforcing members are fixed to the inner peripheral edge facing the hollow portion of the axial center of the spiral blade over substantially the entire length of the spiral blade in parallel with the axial center, The granular solid contained in the suspension by the rotation of the spiral blade When the product is lifted and transferred to the discharge port side at the upper end of the casing, the suspension accompanying the particulate solid is flowed down to the lower end side of the casing from the axial hollow portion of the spiral blade and separated. Yes.

  According to the granular solids transfer device of the present invention, a substantially cylindrical casing having an inlet at one end and an outlet at the other end is inclined so that the outlet side becomes higher, and the casing is charged. A suspension hopper for storing suspension is connected to the mouth, and a ribbon-like spiral blade having a hollow portion formed along the axial center is provided inside the casing, and the upper end of the spiral blade is from the upper end side of the casing. The lower end of the spiral blade is not fixed, but is a free end, and a plurality of reinforcing members are provided on the inner peripheral edge facing the hollow center of the spiral blade. When the spiral blades are fixed over the entire length in parallel with the axial center, and the solid particles contained in the suspension are lifted and transferred to the discharge port side at the upper end of the casing by the rotation of the spiral blades, they are accompanied by the particulate solids. Axis hollow of the spiral blade that makes the suspension Since it is configured to flow down to the lower end side of the casing for separation, the accompanying suspension can be effectively separated without lowering the transfer efficiency of the granular solid, and the bearing portion is exposed to the suspension. This is preferable in terms of maintenance.

  In the granular solids transfer device of the present invention, a substantially cylindrical casing having an inlet at one end and an outlet at the other end is inclined so that the outlet side becomes higher, and the casing is charged. A suspension storage hopper is connected to the mouth, and a ribbon-like spiral blade having a hollow portion formed along the axial center is provided inside the casing. Further, the upper end portion of the spiral blade is fixed to a drive shaft that is rotatably supported by penetrating from the upper end side of the casing, while the lower end portion of the spiral blade is a free end without being fixed to the rotation shaft, etc. A so-called cantilever structure is employed. Further, a plurality of reinforcing members are fixed to the inner peripheral edge facing the hollow portion of the axial center of the spiral blade in parallel with the axial center and over substantially the entire length of the spiral blade.

  Then, when separating and transferring the granular solid from the suspension containing the granular solid using the transfer device, first, the suspension is put into the storage hopper and stored, and settled at the bottom of the hopper. The granular solid is charged into the lower cylindrical casing. The granular solids put into the casing are sequentially pulled up and transferred along the casing by the rotational drive of the ribbon-shaped spiral blades, and at that time, a large amount accompanying the granular solids. Since the suspension of, the clearance between the outer peripheral edge of the spiral blade and the inner wall of the casing, and the large-diameter hollow portion formed along the axis of the spiral blade, flows down relatively quickly to the lower end of the casing. For example, it is effective without reducing the transfer speed of the spiral blades or widening the clearance between the outer periphery of the spiral blades and the inner wall of the casing. Can be separated.

  In addition, this transfer device employs a cantilever structure in which only the upper end portion of the spiral blade is fixed to the drive shaft and the lower end portion is a free end, and a bearing for supporting the spiral blade on the lower end side of the casing. Since there is no portion, problems such as leakage of suspension from the bearing portion and extreme wear of the bearing portion of the bearing cannot occur, which is extremely suitable in terms of maintenance. The ribbon-shaped spiral blade does not originally have a shaft body for supporting the blade at the shaft center portion, and adopts a cantilever structure that fixes only the upper end portion of the blade, but conversely has a shaft body. Even when a large load is applied to the blade, such as during the transfer of granular solids, the weight is reduced significantly due to the absence and reinforcement by a plurality of reinforcing members fixed to the inner peripheral edge of the spiral blade facing the hollow portion of the shaft center. And so that no deformation or the like occurs.

  As described above, a ribbon-shaped spiral blade having a large hollow portion formed along the axial center is adopted as a means for transferring the granular solid contained in the suspension, and only the upper end portion of the spiral blade is driven. Since the bearing part at the lower end of the casing is not required by fixing the shaft to the cantilever structure, the suspension can be quickly flowed down from the hollow part of the shaft center without reducing the transfer efficiency of granular solids. In addition, there are no problems such as leakage of the suspension from the bearing due to exposure to the suspension and extreme wear of the bearing, which is extremely suitable in terms of maintenance.

  Embodiments of the present invention will be described below with reference to the drawings.

  Reference numeral 1 in the figure denotes a transfer device that separates and transfers granular solids from a suspension containing various granular solids such as various slurries, sludge water, and muddy water. As shown in FIG. 1, a substantially cylindrical casing 4 having a discharge port 3 at the other end is inclined at an appropriate angle so that the discharge port 3 side becomes higher. 2 is connected to a storage hopper 5 for storing suspension, and a ribbon for transferring solid solid matter, in which a hollow portion 6 having a relatively large diameter is formed along the axis in the casing 4. A spiral blade 7 is included.

  A drive motor 8 is provided at the upper end of the casing 4, and a drive shaft 9 that rotates via a drive chain or the like according to the drive of the drive motor 8 is passed through the casing 4 from the outer side of the upper end of the casing 4. The upper end of the spiral blade 7 is fixed to the drive shaft 9, and the spiral blade 7 is rotated at a desired speed according to the rotation of the drive shaft 9. The lower end portion of the spiral blade 7 is not fixed to the rotating shaft or the like, but has a so-called cantilever structure as a free end, and the bearing 4 does not exist on the lower end side of the casing 4. In addition, the lower end portion of the casing 4 is provided with an extraction port 10 for extracting residual liquid in the storage hopper 5.

  A clearance 11 having an appropriate width is secured between the outer peripheral edge of the spiral blade 7 and the inner wall of the casing 4. The presence of the clearance 11 enables the spiral blade 7 to rotate smoothly and is a granular solid. While a part of the suspension flows down and is drained to some extent during the transfer of the product, it is set to a size that does not reduce the transfer efficiency of the granular solid as much as possible.

  Further, unlike the spiral blade 7, the shaft center portion does not have a blade support shaft and has a cantilever structure, and the other end is driven in a cantilever structure with one end being a free end. When the transported object is rotated toward the shaft side, it is rotated in the direction of unwinding the spiral on the free end side, so that higher strength is required for the blade, but the axial hollow portion of the spiral blade 7 6 to 8 round steel reinforcing members 12 are fixed at substantially equal intervals in the axial direction and over substantially the entire length of the spiral blade 7. While the blade strength is sufficiently increased and the significant weight reduction expected due to the absence of the shaft body, even when a large load is applied to the spiral blade 7 as in the case of transferring the granular solid, It is intended to prevent deformation and the like.

  When the granular solid material is separated and transferred from the suspension containing the granular solid material using the granular solid material transfer device 1, first, the suspension is put into the storage hopper 5 to be stored. The granular solid that settles at the bottom of the hopper is put into the lower casing 4. In this way, the granular solid charged in the casing 4 is sequentially lifted and transferred along the inner wall of the casing 4 to the side of the discharge port 3 obliquely upward by the rotational drive of the spiral blade 7, A large amount of the suspension accompanying the granular solid is relatively large in which a part thereof is formed from the clearance 11 between the outer peripheral edge of the spiral blade 7 and the inner wall of the casing 4 and the rest is formed along the axis of the spiral blade 7. It quickly flows down from the hollow portion 6 having a diameter to the lower end side of the casing 4 to be drained and effectively separated.

  At this time, the transfer device 1 adopts a cantilever structure in which the lower end portion of the spiral blade 7 is a free end, and there is no bearing portion on the lower end side of the casing 4. Problems such as leakage of the suspension from the part and extreme wear of the bearing caused by the suspension cannot occur, which is extremely suitable in terms of maintenance.

  As described above, since the ribbon-shaped spiral blade in which a large hollow portion is formed along the axial center is adopted as a transfer device for transferring the granular solid contained in the suspension, the transfer efficiency of the granular solid is minimized. The suspension can be quickly flowed down from the hollow portion of the shaft center without being lowered, and can be separated extremely effectively. In addition, since the bearing part on the lower end side of the casing is not required as a cantilever structure in which only the upper end part of the spiral blade is fixed to the drive shaft, suspension leakage from the bearing part and extreme wear of the bearing that conventional devices have Etc. cannot occur, and it can be made extremely suitable in terms of maintenance.

  In addition, in this transfer apparatus, it can employ | adopt suitably also when collect | recovering either a granular solid and a suspension from the suspension containing a granular solid. That is, it is possible to separate unnecessary suspension from useful granular solids as much as possible, and to recover high-purity granular solids, or to use useful suspensions. Of course, it is possible to separate the unnecessary granular solids from the turbid liquid so as to be discharged as much as possible and to recover a high-purity suspension.

  For example, high-purity useful slaked lime is obtained by discharging and separating unreacted residues that are granular solids from a slaked lime slurry in a suspension produced by stirring and mixing quick lime and digested water. It can also be suitably employed when recovering the slurry.

It is the schematic which shows one Example of the transfer apparatus of the granular solid based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Transfer apparatus 2 ... Input port 3 ... Discharge port 4 ... Casing 5 ... Storage hopper 6 ... Hollow part 7 ... Spiral blade 9 ... Drive shaft 11 ... Reinforcement member

Claims (1)

  An apparatus for transferring granular solids, which separates and transfers granular solids from a suspension containing granular solids, and discharges a substantially cylindrical casing having an inlet at one end and an outlet at the other end. A sloping arrangement is provided so that the outlet side becomes higher, and a storage hopper for storing suspension is connected to the inlet of the casing. The upper end of the spiral blade is fixed to a drive shaft that is rotatably supported by penetrating from the upper end side of the casing, while the lower end of the spiral blade is not fixed and is a free end, and the axial center of the spiral blade A plurality of reinforcing members are fixed to the inner peripheral edge facing the hollow portion over the substantially entire length of the spiral blade in parallel with the axial center, and the particulate solid contained in the suspension is discharged from the upper end of the casing by the rotation of the spiral blade. When transported by lifting to the outlet side, granular Transfer device particulate solids characterized by being configured to separate the suspension associated to the shape was allowed to flow down from the shaft suicide empty portion of the spiral blade to the casing lower end.

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