JP4090844B2 - Filtration dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filtration drying apparatus, and more particularly to a filtration drying apparatus capable of appropriately discharging the entire amount of powder and the like in the apparatus.
[0002]
[Prior art]
As a conventional filtration drying apparatus, for example, a technique disclosed in JP-A-8-155216 (Patent Document 1) is known.
[0003]
The filter drying apparatus according to this prior art is configured by using a sealed container, a heating jacket provided outside the side wall of the container, a stirring blade provided inside the container, and the like. The heating jacket has a function for drying the object to be processed put in the container, and the stirring blade has a function for stirring to promote the drying of the object to be processed, and the powder product after drying. Etc., and a function of smoothing the top surface of the cake at the time of filtration, and a function of adding a washing liquid after filtration to make the cake into a slurry again.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-155216
[Problems to be solved by the invention]
However, the filtration and drying apparatus according to the above prior art has a problem that it is difficult to discharge the entire amount of powder and the like after the filtration and drying treatment from the inside of the container.
According to the prior art, the powder is discharged by rotating the stirring blade. However, wear and damage due to contact between the stirring blade and the container (filter plate on the bottom surface) is prevented. In order to do so, a predetermined gap is provided. Therefore, inevitably, even if the stirring blade is rotated, the powder in the gap provided between the stirring blade and the bottom of the container cannot be easily discharged.
[0006]
Accordingly, the present invention has been made to solve the above-described problems of the prior art, and efficiently discharges powder and the like in the container while having a predetermined interval between the stirring blade and the bottom of the container. It is an object of the present invention to provide a possible filter drying apparatus.
[0007]
[Means for Solving the Problems]
That is, the present invention for solving the above problems includes a container provided with a filter cloth inside and below, a rotating shaft provided substantially at the center of the container, a stirring blade fixed to the rotating shaft, Inclining means that can incline the container together with the stirring blade, and vibration generating means that can vibrate the filter cloth in the plane crossing direction ,
When discharging the processing object stored in the container from the container,
The container and the stirring blade are tilted by the tilting means, and the stirring blade is rotated in a state where the filter cloth is vibrated in the plane crossing direction by the vibration generating means.
[0008]
According to such a configuration, the workpiece on the filter cloth is caused to vibrate in the cross-plane direction of the filter cloth by causing the vibration generating means to function while the container is inclined by the inclination means. Since it moves up and down (from higher to lower) along the inclined surface, the object to be processed in the container can be easily discharged.
[0009]
Further, in the filtration drying apparatus according to the present invention, the vibration generating means is provided to give vibration in a cross-plane direction to a substantially central portion of the filter cloth, and the filter cloth is provided from the vibration generating means. A configuration in which primary vibration is generated such that the center portion has a maximum amplitude due to the applied vibration and the amplitude decreases toward the peripheral portion .
[0010]
According to this preferred configuration, the filter cloth is amplitude decreases towards the periphery of the substantially center portion of its the maximum amplitude, to the so-called primary vibration. And according to this structure, by causing primary vibration in this way, the powder can be smoothly moved from the substantially central portion of the filter cloth to the peripheral portion.
Further, according to this configuration, it is possible to cause the object to be processed to diverge or float from the filter cloth by applying vibration. Therefore, by discharging the stirring blade, it is possible to easily discharge the object to be processed.
[0013]
Moreover, in the filtration drying apparatus concerning this invention, the structure whose inclination-angle of the said inclination is about 1 degree-10 degrees is preferable. Furthermore, the inclination angle is more preferably about 5 °.
[0014]
When the container is inclined, if the inclination angle is increased, the structure of the pipe connection portion and the power supply wiring becomes complicated, resulting in an increase in cost. Therefore, according to the present invention, by combining “inclination” and “vibration” as described above, it is possible to effectively discharge an object to be processed with a smaller inclination angle (1 ° to 10 °). . That is, according to the present invention, it is possible to realize a filtration and drying apparatus capable of appropriately discharging an object to be processed without increasing the inclination angle (that is, without complicating the apparatus (piping and wiring)). Yes.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a schematic cross-sectional view of a filtration drying apparatus according to an embodiment of the present invention. In FIG. 1, the filtration and drying apparatus according to the present embodiment is provided on a container 10 into which a cake or the like to be processed is charged, an agitating blade 20 provided in the container 10, and an outer periphery of a side wall of the container 10. The heating jacket 30 that is a heat exchange part, the discharge port 40 for discharging the object to be processed, the vibration generating means 50 that can vibrate the bottom surface part (filter plate and the like to be described later) of the container 10, and the container 10 can be inclined. It is comprised using the inclination means 60 grade | etc.,.
[0017]
The container 10 is formed in the shape of a bell-shaped housing, and a processing object supply port (not shown) for feeding slurry or cake as a processing object is usually provided at the upper part thereof. In addition, a cleaning liquid pipe (not shown) or the like is disposed above the inside of the container 10 as necessary. Furthermore, a driving means 13 for rotating the stirring blade 20, a blade lifting cylinder 14 for moving the stirring blade 20 up and down, and the like are provided on the upper portion (outside the upper wall) of the container 10. Further, a filter cloth 15, a filter plate 16, a filtrate discharge part 17, and the like are provided below the inside of the container 10.
[0018]
The stirring blade 20 is provided at a lower end portion of a rotating shaft 21 provided at a substantially central portion of the container 10, and a rotating shaft protecting portion 22 made of a bellows or the like is provided on the outer periphery of the rotating shaft 21. The rotating shaft protection unit 22 is provided with a stirring blade 20 from the upper inner surface of the container 10 so that the rotating shaft 21 disposed in the container 10 does not come into contact with an object to be processed in the container 10 or the like. It is provided so that a gap may not be formed up to the upper part. Here, the rotating shaft 21 is configured to rotate and move up and down in the container 10. At this time, the rotating shaft protection unit 22 is also configured to move up and down as the rotating shaft 21 moves up and down.
[0019]
As described above, the heating jacket 30 serving as the heat exchange unit is provided on the outer peripheral portion of the side wall of the container 10 so that a medium for performing heat exchange (for example, hot water) can be appropriately circulated or exchanged. Is formed. For example, in the present embodiment, a medium inflow portion and a medium outflow portion (not shown) are provided at appropriate positions of the jacket 30 formed so as to have a predetermined space from the side wall of the container 10. And in this embodiment, after the hot water etc. which flowed in in the jacket 30 via the medium inflow part heat-exchanged with the to-be-processed object in the container 10 via the side wall of the container 10, a medium outflow part. It is comprised so that it may flow out of the jacket 30 via.
[0020]
The vibration generating means 50 includes a rod-like vibration part 51 having one end 51a attached to the filter plate 16 provided in the container 10, and an air vibrator 52 connected to the other end 51b of the vibration part 51. (Corresponding to the “driving part” of the present invention) and the sealing part 53 and the like.
As shown in FIG. 1, the vibrating part 51 penetrates the filtrate discharge part 17, and its one end 51 a is fixed to the filter plate 16 in the filtrate discharge part 17, and outside the filtrate discharge part 17. The other end 51 b is attached to the drive unit 52.
Further, in the portion where the vibrating part 51 passes through the filtrate discharging part 17, the filtrate leakage from the filtrate discharging part 17 is prevented, and the vibrating part 51 is appropriately held while vibrating and stopped. In order to prevent filtrate leakage through the sealing portion 53, a sealing portion 53 is provided. The sealing portion 53 is configured using, for example, a diaphragm, a bellows, a V ring, an O ring, or the like.
[0021]
The tilting means 60 includes a support portion 61 fixed to the container 10, a tilted leg portion 62 that is one of the leg portions that hold the container 10 and is provided to come into contact with the support portion 61, and the tilted leg portion. The hydraulic cylinder 63 is fixed to 62, and the shaft 64 is fixed to the support portion 61 at one end and can be reciprocated by the hydraulic cylinder 63 (in the arrow Y direction in FIG. 1). Although not shown, the container 10 is connected to a pin 68 or the like so that it can swing with respect to a leg 68 (for example, two legs 68) that holds the container 10 other than the inclined leg 62. Attached. In addition, each pipe connected to the container 10 is connected using a flexible joint or the like so that the inclined state can be appropriately absorbed (relaxed) within the inclination movable range of the inclination means 60. Yes.
[0022]
The filtration drying apparatus according to the present embodiment is configured as described above and operates as follows. Here, a case where solid particles (powder particles) in the raw material slurry are taken out using the filter drying apparatus according to the present embodiment will be described as an example, and specific steps in this case will be described in order.
[0023]
<Filtering process>
In the filtration and drying apparatus according to the present embodiment, after supplying the raw slurry into the container 10 from the workpiece supply port, the inside of the container 10 is pressurized using the gas supplied from the gas supply unit (not shown). (Or, the inside of the container 10 is depressurized (in the direction of the filtrate discharge part)), that is, the raw material slurry is filtered by applying pressure to the raw material slurry that is the object to be processed. At this time, the filtrate filtered through the filter cloth 15 and the filter plate 16 is discharged / collected out of the container 10 from a filtrate discharge part 17 provided at the lower part of the container 10. In this way, when any pressure is applied to the raw material slurry, the stirring blade 20 in the present embodiment is retracted above the raw material slurry (above the container 10).
[0024]
By performing the filtration step, only the solid content of the raw material slurry remains in the container 10, and the solid content is deposited on the filter cloth 15 as a wet cake layer.
[0025]
<Expanding process>
During the filtration process, cracks penetrating to the filtration surface (bottom portion of the container 10) may occur on the cake surface, and the pressurized gas or the like may short pass, and filtration may not proceed properly. In such a case, it is necessary to perform a process of smoothing the cake surface using the stirring blade 20. If such a process is performed, the filtration process further proceeds and the mother liquor content in the cake can be lowered.
[0026]
Specifically, after passing through the filtration process for a certain time, the stirring blade 20 that has been retracted above the container 10 is lowered, and the stirring blade 20 is slightly infiltrated into the cake layer, and then the stirring blade 20 is fixed. Rotate at speed. By operating the stirring blade 20 in this way, the above-described cracks are eliminated, and moisture is squeezed out from the cake layer, and this moisture is discharged from the filtrate discharge portion 17. This process is a spreading process.
Here, the stirring blade 20 is configured to be movable up and down by moving the rotary shaft 21 up and down by the lift cylinder 14, and the rotary shaft protection unit 22 expands and contracts along with this up and down. Further, the stirring blade 20 is configured to be rotatable through a rotating shaft 21 that is driven to rotate by the driving means 13.
[0027]
<Washing process>
Next, in order to eliminate foreign matters (impurities such as unreacted substances in the remaining mother liquor) present in the cake, a cleaning process is performed. The cleaning process includes replacement cleaning and stirring cleaning. Depending on the properties of the object to be processed, the process is performed selectively or in combination.
[0028]
In the replacement cleaning, cleaning liquid is supplied into the container 10 from the nozzle part (not shown) at the tip of the cleaning liquid pipe (the cleaning liquid is sprayed on the cake from the nozzle part), and the cake is cleaned. It discharges from the filtrate discharge part 17. At this time, the stirring blade 20 is being fixed to the cake upper surface position.
In the stirring cleaning, the cleaning liquid is accumulated in the container 10 from the nozzle portion at the tip of the cleaning liquid piping, and the cake is again made into a slurry state by the stirring blade 20. At this time, the stirring blade 20 is rotationally driven at a predetermined speed while being fixed at a fixed position in the slurry liquid. Thereafter, by performing the filtration step again, the stirring cleaning is completed.
[0029]
<Drying process>
Next, the inside of the container 10 is depressurized, and the side wall of the container 10 is heated by introducing a heat exchange medium from the medium inflow part into the heat exchange part 30. The stirring blade 20 is moved up and down while rotating at a predetermined speed.
[0030]
In this process, the cake layer deposited on the filter cloth 15 is stirred and mixed by the stirring blade 20 by operating the stirring blade 20 and the like as described above, and heat exchange is performed through the side wall of the container 10. The heat from the part 30 is received. That is, a drying process for the object to be processed is performed by this stirring action and heat exchange.
Then, when the drying of the solid content proceeds to a certain level, the drying process is further advanced while the height of the stirring blade 20 is fixed and rotated at a certain position in the cake layer. As a result, when the object to be processed reaches a predetermined dry state, the inside of the container 10 is returned to the atmospheric pressure, the supply of the heat exchange medium to the heat exchange unit 30 is stopped, and the drying process is completed.
[0031]
<Discharge process>
Next, in the present embodiment, in a state where the container 10 is inclined at a predetermined angle and the filter plate 16 and the like in the container 10 are vibrated, the dried powder material (the object to be processed) in the container 10 ) Is discharged.
Here, FIG. 2 shows a schematic cross-sectional view of the filtration and drying apparatus according to the present embodiment, and FIG. 2A shows a state where the inclination angle of the container 10 is “0 °”. (B) has shown the state whose inclination-angle of the container 10 is "5 degrees".
[0032]
In the present embodiment, as shown in FIG. 2A, the processing from the filtration step to the drying step described above is performed in a state where the inclination angle of the container 10 is “0 °”. That is, from the filtration step to the drying step in a state where the ground plane G of the apparatus is substantially parallel to the filter plate 16 and the like constituting the vessel 10 and the gravity acts on the object in the vessel 10 evenly. Is processed. In such a state (see FIG. 2 (a)), the processing from filtration to drying is performed when the container 10 is inclined, non-uniform filtration, drying, etc. are performed on the object to be processed. Because it will be done.
[0033]
On the other hand, as described above, in this embodiment, the container 10 is tilted by a predetermined angle (here, 5 °, see FIG. 2B) and the filter plate 16 and the like in the container 10 are vibrated. In this state, the powder material in the container 10 is discharged.
Specifically, first, as shown in FIG. 2B, the shaft 64 in the hydraulic cylinder 63 is driven to tilt the container 10. Here, the container 10 is tilted so that the powder in the container 10 moves to the discharge port 40 side. Secondly, the air vibrator 52 is driven to vibrate the filter plate 16 and the filter cloth 15 via the vibration part 51. Third, in a state where tilting and vibration are applied, the driving means 13 (electric motor or the like) is driven to rotate the stirring blade 20. At this time, a gap having a predetermined interval (for example, 5 mm to 10 mm) is provided between the stirring blade 20 and the filter cloth 15.
[0034]
In the present embodiment, as described above, the discharge port 40 while performing the inclination (inclination of the container 10), vibration (vibration of the filter plate 16 as the bottom surface of the container 10), and rotation (rotation of the stirring blade 20). Therefore, the dried powder (processed object) in the container 10 is appropriately discharged out of the container 10 through the discharge port 40, and the entire amount of the powder can be recovered efficiently. it can.
[0035]
Specifically, according to the present embodiment, the powder 10 is discharged by combining the small inclination angle (for example, 5 °) and vibration, and rotating the stirring blade 20. The piping and wiring connected to the container 10 may also be configured to allow a small movement. In other words, since each pipe or the like has only a small movement, it is possible to always be connected using a flexible joint, a bellows, or the like without performing an attaching / detaching operation or the like when the container 10 is moved.
Thus, according to this embodiment, since the container 10 is slightly inclined, the entire amount of the object to be processed in the container 10 can be discharged without attaching or detaching piping or the like, so that fully automatic operation is possible. (It is possible to save labor without the need for manpower), and it is possible to prevent the occurrence of contamination.
[0036]
Further, in the present embodiment, since the vibration generating means 50 is provided to apply vibration to the substantially central portion of the container bottom portion (the filter plate 16 forming the container), the substantially central portion of the filter plate 16 is set to the maximum amplitude. A vibration form (so-called “primary vibration”) in which the amplitude decreases toward the peripheral part (peripheral part of the filter plate 16) is obtained. Therefore, according to the present embodiment, the powder on the filter plate 16 is effectively moved toward the periphery of the filter plate 16 to perform the necessary minimum “tilt” as described above. Based on the interaction, the powder can be appropriately discharged.
Furthermore, in this embodiment, since vibration is given to one place of the substantially central portion of the disk-shaped filter plate 16, uniform vibration can be easily given to the entire area of the filter plate 16.
Even when the above-mentioned “primary vibration” cannot be obtained, vibration is applied to one portion of the substantially central portion of the disk-shaped filter plate 16, so that vibration waves are generated on the filter plate 16. It is transmitted from the center to the periphery. Therefore, according to this embodiment, the powder (object to be processed) on the filter plate 16 moves toward the periphery of the filter plate 16 by this vibration wave, and is appropriately discharged.
[0037]
The present invention is not limited to the above embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.
[0038]
For example, although the case where the air vibrator 52 is used as the drive unit has been described in the above embodiment, the present invention is not limited to this configuration, and a vibration motor, a piezoelectric element, or the like may be used as the drive unit.
[0039]
Moreover, in the said embodiment, although the case where the inclination means 60 was comprised using the hydraulic cylinder 63 was demonstrated, this invention is not limited to this structure, An electric jack, an air cylinder, etc. are used as needed. Also good.
[0040]
Moreover, in the said embodiment, although the case where the container 10 was inclined "5 degrees" at the time of a discharge process was demonstrated, this invention is not limited to this structure, As needed, it is inclined 1 degree-10 degrees The discharging step may be carried out.
[0041]
【The invention's effect】
As described above, in the present invention, the process of discharging the object to be processed in the container is performed while the container is inclined, the container bottom is vibrated, and the stirring blade is rotated.
Therefore, according to the filtration drying apparatus according to the present invention, the movement of the object to be processed in the direction of the discharge port is promoted by the inclination and vibration, and therefore, when there is a predetermined interval between the stirring blade and the bottom of the container. Even if it exists, all the to-be-processed objects (powder etc.) in a container can be discharged | emitted efficiently.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a filtration and drying apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of a filtration and drying apparatus according to an embodiment of the present invention. FIG. 2 (a) shows a state where the inclination angle of the container is 0 °, and FIG. 2 (b) shows the inclination angle of the container. A state of 5 ° is shown.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Container, 13 ... Drive means, 14 ... Cylinder for blade raising / lowering, 15 ... Filter cloth, 16 ... Filter plate, 17 ... Filtrate discharge part 20 ... Stirring blade, 21 ... Rotating shaft, 22 ... Rotating shaft protection part 30 ... Heat Replacement part (heating jacket)
DESCRIPTION OF SYMBOLS 40 ... Discharge port 50 ... Vibration generating means, 51 ... Vibrating part, 52 ... Air vibrator, 53 ... Sealing part 60 ... Inclining means, 61 ... Supporting part, 62 ... Inclining leg part, 63 ... Hydraulic cylinder, 64 ... Shaft part , 68 ... Leg

Claims (3)

A container provided with a filter cloth inside and below, a rotating shaft provided substantially at the center of the container, a stirring blade fixed to the rotating shaft, and a tilting means capable of tilting the container together with the stirring blade; A vibration generating means capable of vibrating the filter cloth in the plane crossing direction ,
When discharging the processing object stored in the container from the container,
Filtration characterized in that the container and the stirring blade are tilted by the tilting means, and the stirring blade is rotated while the filter cloth is vibrated in the plane crossing direction by the vibration generating means. Drying equipment. The vibration generating means is provided to give a vibration in a direction intersecting the plane to the substantially central portion of the filter cloth, and the filter cloth is surrounded by the vibration from the vibration generating means with the central portion as a maximum amplitude. The filtration drying apparatus according to claim 1, which performs primary vibration with an amplitude decreasing toward the portion .   The filtration drying apparatus according to claim 1 or 2, wherein an inclination angle of the inclination is 1 ° to 10 °.

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