JPH0127843Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for continuously filtering a liquid material in which particles are mixed.

(Prior art and its problems) In general, the stock solution is pumped or suctioned through a filter cloth to separate it into filtrate particles and filtrate, but because the filter cloth becomes clogged, continuous The stock solution cannot be filtered.

Therefore, in order to deal with this problem, we decided to
No. 34346 proposed a device that continuously performs filtration while forcibly discharging filter slag particles.

This filtration device consists of a single filter body formed by alternately combining disc-shaped filter plates and thick-walled spacers with a smaller outer diameter than the disc-shaped filter plates, and connecting them with a shaft passing through the center. A row of single filters is formed by arranging the single filters in such a way that the outer periphery of one filter plate contacts and meshes with the outer periphery of the other spacer, and the rows of single filters are arranged one above the other to form a row of single filters. The stock solution is supplied to the filter plate, and the stock solution is filtered through the gap created by the difference in wall thickness between the filter plate and the spacer. At the same time, by rotating the single filter body in the direction in which the stock solution is supplied, the stock solution is filtered out. It is designed to forcibly send out the ivy filter particles.

However, this filtration device is configured such that the filtrate naturally falls through the gap created by the difference in wall thickness between the filter plate and the spacer, and the filtration density is coarse and fine particles cannot be filtered. Of course, the filter slag sent out by the single filter in the previous process in the single filter row is once pushed into the troughs formed between the single filters, so the filter slag itself acts as a filter and is expected to achieve high-density filtration. However, in this case, the filtration rate becomes extremely slow and is not suitable for practical use.

(Technical Problem) The technical problem of the present invention is to quickly perform high-density filtration while preventing clogging of the filter slag.

(Technical Means and Effects thereof) In order to solve this technical problem, the present invention provides a filter medium formed by densely superimposing a large number of immovable plates and movable plates on the outside of a shaft body forming a flow path. The undiluted solution is filtered between the polymerized plates by applying negative pressure to the flow path of the shaft body using a suction device, and the shaft body is locked only to the movable body and rotated, and the immovable plate By rotating the movable plate between the plates, the convex portion protruding from the outer periphery of the movable plate intermittently pushes the filter slag that accumulates on the outside between the plates, thereby disrupting the balance in which the filter slag tends to accumulate. The technical means is to let it fall naturally.

(Effects of the present invention) Therefore, according to this technical means, filtration is performed by centripetally passing the stock solution between the densely polymerized immovable plate and the movable plate. Moreover, the flow path of the shaft body is suctioned to perform forced filtration, and the filtration can be performed in a short time.

The filter dregs remain on the outer periphery between the stationary plate and the movable plate while being sucked into the space between the plates together with the stock solution. Filtration can be carried out continuously in good condition without clogging the gaps and making filtration impossible.

(Example) Next, a specific example of the above technical means will be explained using the drawings.

FIG. 1 shows the filtration device with the front wall removed. The box body 1 has a stock solution supply port 2 at the top and a filter dregs receiving section 3 at the bottom.

A stationary plate 6 constituting the filter medium 5 has a circular shape, a through hole 7 is bored in the center thereof, and a projecting piece 8 having a hole 9 is fixed to the upper part (see FIG. 2).

Furthermore, the movable plate 11 has a circular shape with the same outer diameter as the fixed plate 6, and has a through hole 12 with a smaller diameter than the through hole of the fixed plate in the center thereof, and four convex portions 13 on the outer periphery. They are protruded at equal intervals, and key grooves 14 are formed in the through holes 12 (see FIG. 3).

These plates 6 and 11 are made of iron plates with a thickness of about 0.2 mm, but the thickness may be selected depending on the type of the stock solution or slag.

As shown in FIG. 4, the shaft body 15 is composed of a pipe with a large number of through holes 16 bored in its outer peripheral wall. A convex protrusion 17 having the same width is provided.

This shaft body 15 passes through the filter medium 5 in which the movable plates 6 and 11 described above are alternately superposed,
With the convex protrusion 17 of the shaft body fitted into the key groove 14 of the movable plate and keyed, the shaft body 15 is pivotally supported by bearings 18 and 19 fixed on the left and right sides of the box body 1, and one end of the shaft body 15 is attached to the box body. It is made to protrude outward from 1.

The hole 9 in the projecting piece of the immovable plate 6 is passed through a bar 10 which is installed and fixed in the upper part of the box body 1.

In this state, supply undiluted solution such as oil from the supply hole,
When the inside of the shaft body 15 is suctioned with a suction device (not shown),
The stock solution passes between the stationary plate 6 and the movable plate 11 and is sucked into the shaft body 15, and the filter dregs remain on the outer periphery between the plates. Therefore, using the motor 21, the shaft body 15
When the immovable plate 6 is rotated, since it is positioned by the bar 10, only the movable plate 11 keyed to the shaft body 15 rotates, and its convex portion 13 intermittently removes the accumulated filter slag. The filter dregs are pushed and allowed to fall naturally, and the filter dregs descend to the receiving part 3.

FIG. 5 shows the device for filtering using two shafts 35 with the front plate removed.

In the device of this embodiment, the immovable plate 26 has a figure 8 shape as shown in FIG. 6, and has two through holes 27 at the top and bottom.

This fixed plate 26 and the movable plate 1 shown in the previous embodiment
Two series of filter media are placed one above the other by alternately superimposing filter media 1 and 1, and the movable plates are rotated in the same direction (see arrows) by a drive means (not shown).

Filter dregs receiving box 33 located at the bottom of the box body 31
communicates with the inclined tube 36, and this inclined tube 36
A screw 37 that rotates by a drive means (not shown) is housed inside, and by rotating the screw 37 when the filter slag has accumulated, the filter slag can be automatically taken out from the discharge port 38. ing.

In the above embodiment, the shaft body is made of a pipe with a large number of through holes, but as shown in Fig. 7, it is also possible to use a shaft with grooves formed on the outside in the same direction as the shaft core. It may be used as a shaft, and the groove may be used as a flow path for the filtrate. Note that this groove does not necessarily have to be linear, and may be a spiral or meandering non-linear groove formed on the outer periphery of the shaft.

[Brief explanation of the drawing]

The drawings all show an embodiment of the present invention. Figure 1 is a front view of the inside of the filtration device, Figure 2 is a right side view of the stationary plate, Figure 3 is a right side view of the movable plate, and Figure 4 is a right side view of the movable plate. The figure is a front view of the shaft body, FIG. 5 is a partially cutaway front view of a filtration device in another embodiment, FIG. 6 is a right side view of a stationary plate in another embodiment, and FIG. 7 is another embodiment. FIG. 3 is a sectional view of the shaft body in the embodiment. 6, 26: Fixed plate, 11: Movable plate, 13: Convex portion, 15, 35: Shaft body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A rotating shaft with a flow path formed therein, and a stationary plate and a movable plate each having a through hole are alternately and closely superimposed and the through holes are made to coincide with each other. It consists of a formed filter medium and a suction device for creating a negative pressure in the flow path.A shaft body is passed through the filter medium and a movable plate is locked, and one or more convex portions are protruded on the outer periphery of the movable plate. A continuous filtration device characterized by: (2) The device according to claim 1 of the utility model registration claim, wherein the shaft body is a pipe with a large number of holes bored in the outer circumference. (3) The device according to claim 1, wherein the shaft body is a shaft having a linear or non-linear groove formed on the outer periphery. (4) Utility model registration request where the filter medium is formed by densely overlapping a stationary plate with multiple through holes and a movable plate with one through hole alternately over multiple shafts. The device according to claim 1, 2 or 3.