JPH0773797B2 - Solid-liquid separation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-liquid separating device for continuously supplying a solid-liquid mixed substance by a screw and continuously separating and discharging a solid substance and a liquid substance.

[0002]

2. Description of the Related Art As a prior art of this type of solid-liquid separation device, a scraper filtration device (Japanese Patent Application Laid-Open No. 2-290208) and a cylindrical solid-liquid separation device (Japanese Patent Application Laid-Open No. 3-290208) filed by the present inventor.
No. 86204) has been proposed. FIG. 5 shows a sectional side view and an enlarged perspective view of a portion A of the essential parts of this scraper filtration device.

In FIG. 5, reference numeral 1 denotes a cylindrical body having a filtration peripheral surface, which is formed by processing a perforated porous cylindrical body or the like and is provided with a large number of liquid circulation holes 1a.

A locking groove 1b is formed in a spiral shape on the inner peripheral surface of the cylindrical body 1 at a predetermined pitch, and a top end portion is engaged with the locking groove 1b to form a wire rod 2 having an isosceles triangular cross section. Is wound in a spiral shape and locked and fixed, and slits s, which are filtration holes having a predetermined width dimension, are continuously formed in a spiral shape between the wire rods 2.

The base 2a of the triangular cross section of the wire 2 forms a smooth cylindrical inner peripheral surface R, and the solid substance and the liquid substance are separated by filtration with the cylindrical body 1 and the spirally wound wire 2. A filter element F is constructed. Reference numeral 3 is a cylinder formed by fitting the filter element F inside the outer cylinder 3a, 4 is a discharge pipe disposed at the bottom of the outer cylinder 3a for discharging the filtrate filtered by the filter element F, and 5 is the cylinder 3 Of the filter element F is a feed screw (hereinafter referred to as a screw) which is held in a non-contact manner with a small gap maintained between the inner peripheral surface R and the filter element F.
The pitch of the crests of the solid-liquid mixed substance supplied by the rotation of the screw 5 changes the supplied solid-liquid mixed substance by a variable pitch method in which the groove depth decreases toward the tip, or a variable depth method in which the depth of the groove decreases toward the tip. It is configured to be pressure-fed toward the tip of the.

Reference numeral 6 denotes a scraper mechanism (hereinafter referred to as a scraper) which is held in a groove formed on the peripheral end surface of the crest of the screw 5 and is provided with spring elasticity in the outer peripheral direction. The scraper 6 is a filter element F. It is configured to be in sliding contact with the inner peripheral surface R and scrape off the solid substance adhering to the inner peripheral surface R. Reference numeral 7 denotes a bearing that rotatably holds the tip of the screw 5, and the bearing 7 is a cylinder head (hereinafter referred to as a head) 8 attached to the tip of the cylinder 3.
Supported by. Reference numeral 9 denotes a diaphragm member that holds the gap c between the inner peripheral edge of the tip opening portion of the head 8 and the inner peripheral edge of the head member 8. Aperture surface 8 formed on the periphery
The gap c with the a can be arbitrarily adjusted by rotating the handle 11 attached to the aperture adjusting screw 10. 12 is an adjusted clearance c between the diaphragm surfaces 8a and 9a.
Reference numeral 13 denotes a hopper for storing the solid substance discharged from the container in a container (not shown), and 13 denotes a frame of the filtering device. The head 8, the diaphragm member 9A, the diaphragm adjusting screw 10 and the handle 11 constitute a filter residue discharging mechanism A.

The operation will be described based on the above configuration. First, when a screw (5) is rotated by driving a motor (not shown), the solid-liquid mixed substance supplied to the screw (5) from a feed hopper (not shown) is pushed forward inside the cylinder (3) according to the rotation of the screw (5). Be done. At this time, the liquid substance is guided from the slit s of the inner peripheral surface R of the filter element F through the circulation hole 1a into the outer cylinder 3a by the compression action due to the volume change of the groove of the screw 5, and by the discharge pipe 4 at the bottom. It is taken out. As it goes to the tip of the screw 5, the liquid substance of the solid-liquid mixed substance is filtered by the slit s to separate the filter residue, and the solid substance is discharged into the head 8.
The gap c between the diaphragm surface 8a of the head 8 and the diaphragm surface 9a of the diaphragm member 9 is adjusted in advance to the most suitable gap size for solid-liquid separation by the operation of the handle 11, so that the filter residue filled in the head has a gap c. The discharge pressure of the filter dust increases due to the throttling effect, and this pressure gives a back pressure to the screw 5, so that the pressure inside the groove of the screw 5 also increases accordingly, and the liquid substance is separated. More effectively done. The filter dust discharged from the gap c is in the hopper 1.
It is guided by 2 and separately stored in a storage container (not shown).

[0008]

In the conventional example, the solid substance and the liquid substance are separated from the solid-liquid mixed substance as described above, and therefore, the separation and filtration of the liquid substance is almost complete and sufficient. It is possible. However, it has not been attempted to further squeeze the filter residue at the time of discharging the filter residue to further complete the filtration.

The present invention has been made in order to further complete the solid-liquid separation from the solid-liquid mixed substance as compared with the prior art, and is high with respect to the filter residue discharged from the screw due to the restriction added by the discharging mechanism. It is an object of the present invention to provide a solid-liquid separation device that can perform solid-liquid separation more completely than before by performing secondary filtration using pressure.

[0010]

Therefore, in the solid-liquid separation device according to the present invention, the scraper mechanism is provided on the outer peripheral end face in the cylindrical body having the filtration peripheral surface having the filtration holes of the desired size formed on the peripheral surface. A screw for transferring the solid-liquid mixed substance is rotatably arranged, and a supply port for the solid-liquid mixed substance to be filtered is provided in one of the cylinders to discharge the filter residue compressed and transferred by the screw at the other end. A discharge mechanism is provided , and in the vicinity of this discharge mechanism, there are provided secondary filtration means for performing secondary filtration by the pressing pressure of the screw, and filtrate discharge means for taking out the filtrate filtered by this secondary filtration means to the outside. At the same time, the filtering surface formed in the secondary filtering means is formed by spirally winding and fixing the wire rods on the flat plate- shaped perforated base plate at equal intervals and spirally with a desired equal width between the wire rods. Continuous slits Form, or filtering surface to form a secondary filtering means, varying the spacing conical plate shape perforated base plate on
It is intended to achieve the above-mentioned object by winding and fixing the wire material in a spiral shape by making it into a spiral shape .

[0011]

In the solid-liquid separation device according to the present invention having the above-described structure, the secondary filtering means for carrying out the secondary filtration by utilizing the high discharge pressure applied by the discharging mechanism to the filter residue extruded from the screw. In this way, the secondary squeezing is sufficiently performed to squeeze out the filter residue even more completely, and the separation of the liquid substance is performed in an extremely complete state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

(Structure) FIG. 1 is a sectional side view of a main part of a solid-liquid separator showing an embodiment of the present invention, and FIG. 2 is an enlarged side sectional view of the same part. Note that the same or corresponding parts as those of the conventional example are represented by the same reference numerals.

In FIGS. 1 and 2, reference numeral 14 denotes a perforated base plate (hereinafter referred to as a base plate) having a porous structure having a liquid substance flow hole 14a, and the base plate 14 has a predetermined interval dimension p ₁ . The top end portion of the wire rod 2 having an isosceles triangular cross section is engaged with the locking groove 14b formed in a spiral shape and is fixed by an adhesive agent or welding, and a slit s having a desired width dimension is formed.
₁ is continuously formed in a spiral shape, and the bottom side 2a of the triangular cross section of the wire rod 2 forms a smooth planar filtration surface R ₁ . Reference numeral 9A denotes a throttle member that controls the discharge pressure of the filter residue by adjusting the gap c. The throttle member 9A is formed with a recessed hole 9b, and a step 9c is provided at the edge of the recessed hole 9b. The base plate 14 is fitted and held on 9c. Reference numeral 15 is a discharge pipe for the separated liquid substance attached to the discharge port 9d for the liquid substance opened on the lower surface of the inner periphery of the recessed hole 9b by screwing or the like, and 16 is one of the races fitted to the tip of the gap adjusting screw 11. The other race is fitted to the throttle member 9A to adjust the size of the gap c according to the rotation of the screw 11, and the thrust bearing is loaded with thrust due to the discharge pressure of the filter residue. F ₁ is base plate 1
4 and the wire rod 2. The filter element F ₁ , the cylinder head 8 (hereinafter referred to as a head), the throttle member 9A, the throttle adjusting screw 10 and the handle 11 together form the secondary filtering means B. The throttle member 9A and the discharge pipe 15 constitute filtrate discharge means C, respectively. s and s ₁ are slits that form the filtration holes.

(Operation) An operation will be described based on the above configuration. Until the solid-liquid mixed substance is pushed out to the head 8, it is exactly the same as in the conventional example, and therefore detailed description thereof is omitted.

When the screw 5 is rotated, the head 8 is filled with a solid substance, which is a liquid substance almost completely separated from the liquid substance by the screw 5 and the filter element F, that is, filter residue, which is adjusted by the operation of the handle 11 in advance. It is discharged from the gap c into the hopper 12. At this time, the pressure of the filter residue in the head 8 increases due to the throttling effect of the gap c. Due to this high pressure, the filter residue in the head 8 is pressed against the filter surface R ₁ of the filter element F ₁ , and the liquid substance remaining in the filter residue is further squeezed out completely by the secondary throttle, and from the slit s _1. It is introduced into the recessed hole 9b through the circulation hole 14a and taken out from the discharge pipe 15 to the outside. As a result, no residue of the liquid substance remains in the filter residue discharged from the adjustment gap c, and the solid-liquid separation of the solid-liquid mixed substance can be completed.

Next, another embodiment of the present invention is shown in FIG. 3 which is a sectional side view of the solid-liquid separation device, and FIG. 4 is an enlarged side sectional view of the main part. The same or corresponding parts as those in the above embodiment are designated by the same reference numerals.

In FIGS. 3 and 4, 8A is a cylinder head (hereinafter referred to as a head), and the diaphragm surface 8b of the head 8A is formed with a wide conical surface having a partial cone shape.
Diaphragm member 9A is almost equal gradient stop surface 8b of the head 8A, step a filter element F ₂ a gap c ₁ is formed to a desired angle of the conical shape small enough to be close to the discharge end of the filtration Kas 9c Is held in place.

In the above construction, the operation is the same as that of the above embodiment, but the compression pressure is increased as the separated filter residue approaches the discharge end, and the conical filtering surface R formed on the filter element F ₂ is formed. _The filter element F ₂ is pressed against ₂ , which causes the filter residue to be more completely squeezed, and the separated filter residue slides along the filter surface R ₂ at a high pressure to prevent the filter element F ₂ from being clogged. The filtration efficiency of the liquid substance can be kept at a perfect level over a period of time.

For this reason, it is possible to obtain a solid-liquid separator having excellent performance which is optimal for solid-liquid separation of a solid-liquid mixed substance without causing clogging in cooperation with a scraper mechanism arranged on the screw.

In the above-mentioned embodiment, the wire element having an isosceles triangular cross section is wound around and fixed to each of the filter elements F, F ₁ and F _2. However, the present invention is not limited to this, and the cross section is round, A wire rod having a square shape, an equilateral triangle shape, a trapezoidal shape, or the like may be used, and a filter element having an appropriate structure such as a mesh structure may be used. Further, the wire material may be fixed to the base plate by an appropriate method such as an adhesive or spot welding.

Further, the structure of the secondary filtering means is not limited to the above embodiment, and any suitable structure capable of effectively performing the secondary filtering such as forming the filtering surface of the filter element into a substantially cylindrical shape may be used.

[0023]

As described above, according to the present invention, a screw is rotatably arranged in a non-contact manner in a cylinder having a filter hole in its peripheral surface, and a screwer mechanism is provided on the outer peripheral end surface of this screw. Filtration means for performing secondary filtration on the cylinder head of the apparatus by utilizing the high discharge pressure generated by the discharge mechanism for filter dust compressed and discharged by the screw, and filtrate discharge means for taking out the filtrate filtered by this filter means to the outside. Since the filter is provided, the filter residue squeezed by the screw is further subjected to secondary filtration at a high pressure, so that the liquid substance remaining in the separated solid substance can be separated and collected without any liquid substance.

The secondary filtering means has a conical surface close to the discharge end.
We decided to form the wire by winding and fixing the wire closely.
More, filtered throttling is improved, separation of the liquid material from the solid-liquid substance mixture becomes even more satisfactory, solid-liquid be extremely Umate high performance that can be performed in a complete state separation filtration of the mixed substance <br /> can it to provide a solid-liquid separator.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a main part of a solid-liquid separator according to an embodiment of the present invention.

FIG. 2 is an enlarged side sectional view of a main part of the above embodiment.

FIG. 3 is a side sectional view showing the configuration of the essential parts of a solid-liquid separation device according to another embodiment of the present invention.

FIG. 4 is an enlarged side sectional view of a main part of the other embodiment.

FIG. 5 is a cross-sectional side view and a partially enlarged perspective view of a main part of a solid-liquid separation filtration device of a conventional example.

[Explanation of symbols]

1 cylinder 1b, 14b locking groove 2 wire rod 5 screw 6 scraper mechanism 14 base plate A discharge mechanism B secondary filtration means C filtrate discharge means p, p ₁ interval dimension s, s ₁ slit (filter hole) In the figure The same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] 1. A screw for transporting a solid-liquid mixed substance having a scraper mechanism provided on an outer peripheral end face is rotatably arranged in a cylinder having a filter peripheral face having a filter hole of a desired size formed on the peripheral face, a discharge mechanism for discharging the filtration debris is compressed transported by the screw to the other tip provided the supply port of the solid-liquid mixture to be filtered material to one of said tubular body, in proximity to the discharge mechanism, the pressing of the screw A secondary filtration means for performing secondary filtration by pressure and a filtrate discharge means for taking out the filtrate filtered by the secondary filtration means to the outside are provided.
A solid-liquid decomposition apparatus, comprising a filter formed in the secondary filtration means.
The upper surface is a flat plate-shaped perforated base plate with evenly spaced vortices.
The wire is wound and fixed in a winding shape, and a desired equal width is provided between the wire.
It is characterized by forming a spiral slit of size
Solid-liquid separator to. 2. A filter hole having a desired size is formed on the peripheral surface.
A scraper mechanism is attached to the outer peripheral end surface in a cylinder with a filtration peripheral surface.
Freely rotate the screw to transfer the solid-liquid mixed substance
A supply port for the solid-liquid mixed substance to be filtered is provided in one of the cylinders.
The other end is compressed and transferred by the screw.
Equipped with a discharge mechanism to discharge the filter residue
Adjacent to each other, secondary pressure is applied by pressing pressure of the screw.
The secondary filtering means to be performed and the secondary filtering means
And a means for discharging the filtrate to the outside are provided.
A solid-liquid decomposition apparatus, comprising a filter formed in the secondary filtration means.
The upper surface is a conical disc-shaped perforated base plate with a variable spacing.
Then, the wire is wound and fixed in a spiral shape, and the width dimension is set between the wires.
Specially, the changed spiral slit is formed.
Solid-liquid separation device to collect.