JPH0376169B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention provides a liquid collection section in which a semipermeable membrane such as an ultrafiltration membrane or a reverse osmosis membrane is stretched, and a liquid passage gap on the surface of the membrane. A plurality of plates on both sides are piled up in the front and rear direction and pressed in a row between the front and rear fixed end plates and movable end plates, and the undiluted solution is allowed to flow into the liquid passage gap where each of the plates faces each other in contact with the membrane. The present invention relates to a flat membrane device that separates a liquid that passes through a membrane and is obtained in a liquid collecting section and a concentrated liquid that does not pass through the membrane.

(Prior Art) Such a flat membrane device is known from Japanese Patent Publication No. 52-10113. As shown in FIGS. 8 and 9, this conventional device has a single movable end that can be moved along a horizontal support member 4 that is installed between a fixed end plate 2 and a fixed support column 3 that face each other in the front and back on a bed 1. Board 2', one or more boards,
Here, three partition plates 5... and a plurality of plates 6... are suspended between the fixed end plate 2 and the partition plates, between the partition plates, and between the partition plate and the movable end plate, for example. By tightening the bolts 7 and nuts 7' passed between the fixed end plate 2 and the movable end plate 2', the blocks consisting of the partition plates 5 and the plates 6 for multiple sheets are sandwiched between the end plates 2 and 2'. Press.

On the front and rear surfaces of each plate 6, a washboard-like liquid collection recess 8 is formed by recessing two steps inside the peripheral edge made of a gasket, and a membrane 8 covering the liquid collection recess 8 is formed around the entire circumference of the first step. ' is stretched to form the liquid collection part 9,
Liquid passage ports 10 and 11 are opened at the top and bottom of this stage, and the upper liquid passage ports 10 and the lower liquid passage ports 11 of the board 6 for multiple sheets constituting each block are opposite to each other. Each liquid passage gap 9' between the plates
It becomes a series separated by . Each plate 6 has an extraction hole 12 through which the liquid that has passed through the membrane 8' and obtained in the liquid collection recess 8 is extracted from the periphery of the plate.

To carry out the separation, the stock solution is supplied by a pump to the liquid supply port 13 on the fixed end plate 2 that communicates with the upper liquid passage port 10 of the first block, and between the first and second blocks and between the third block. Each partition plate between the second block and the fourth block has a lower relay port 11' that communicates with the lower liquid passage port 11 of each block, and the partition plate between the second block and the third block is A device having an upper relay port 10' communicating with the upper liquid passage port 10 is used, and the movable end plate 2' is provided with a liquid drain port 14 communicating with the upper liquid passage port 10 of the fourth block.

As a result, the stock solution supplied from the liquid supply port 13 of the fixed end plate 2 to the continuous upper liquid passage port 10 of the first block passes through the liquid passage gaps 9' of all the plates of the first block to the membrane. contact and flow downward, at which time,
The liquids that have passed through the membrane and obtained in the liquid collecting recesses 8 are discharged from the respective extraction holes 12, and the stock liquid that has not passed through the membrane is discharged from the partition between the lower liquid passage port 11 of the first block and the second block. It flows through the lower relay port 11' of the plate into the series of lower liquid passage ports 11 of the second block, contacts the membrane in the liquid passage gaps 9' of all the plates of the second block, and then flows upward. At this time, the liquid that has passed through the membrane and obtained in the liquid collection recess is discharged outside the plate through the extraction hole 12, and the stock liquid that has not permeated is transferred from the upper liquid passage port of the second block to the third block. 3rd through the upper relay port 10' of the partition plate between the block and
It flows into a series of upper passage ports 10 of the block and now flows in a downward flow through the passage gaps 9' of all plates of the third block against the membrane.

In this way, the liquid that has flowed upward (or downward) through each liquid passage gap of the previous stage block by contacting the membrane will flow in the opposite direction through the liquid passage gap of the next stage block by contacting the membrane. The liquid flows in a downward flow (or upward flow), repeats a meandering flow in the vertical direction for each block, and flows in contact with the membrane through the liquid passage gap in the final stage, here the fourth block. The concentrated liquid that has not passed through the membrane is discharged from the drain port 14 of the movable end plate.

(Problems to be Solved by the Invention) By the way, such flat membrane devices are often used for wastewater treatment, food manufacturing processes, etc., and in the case of wastewater treatment, they are used only once a week or so. In the case of food manufacturing processes, it is necessary to separate the laminated boards one by one and open the frame every day, and clean both end plates and partition plates. Furthermore, after cleaning, it is necessary to press the layers together again.

In the conventional device described above, in order to separate the plates one by one, the nut 7' is loosened and removed from the bolt 7, and the movable end plate is manually moved toward the fixed support column, and the above operation is performed after cleaning. This had to be done in reverse, which required a great deal of effort and time.

(Means for Solving the Problems) Therefore, the present invention provides a movable base connected to a movable end plate by a piston unit, and a pair of rails that movably support the movable base in the same direction as the movable end plate, The present invention is characterized in that a screw shaft parallel to the rail passes through the movable base and is screwed into engagement with the movable base.

(Function) As a result, in the present invention, the piston of the piston unit is retracted to release the clamping pressure between the movable end plate and the fixed end plate, and the screw shaft is rotated in one direction so that the movable The platform can be moved back along the rail away from the plate along with the movable end plate.

Further, when the screw shaft is rotated in the opposite direction, the movable base moves forward along the rail with the movable end plate, and the movable end plate can be brought into contact with the plate. When the movable end plate comes into contact with the plate, the rotation of the screw shaft is stopped and the piston of the piston unit is extended, so that the plate can be clamped between the movable end plate and the fixed end plate.

(Embodiment) In the illustrated embodiment, components having the same functions as those of the conventional example described above are denoted by the same reference numerals.
Now, 15 is the movable end plate 2' and the piston unit 1.
A movable base 6 is connected to the movable base, 17 is a pair of rails that movably supports the movable base 15 in the same direction as the movable end plate, and 18 and 18 are the rails that pass through the movable base and are threadedly engaged with the movable base. 17, the screw axis is parallel to 17.

The rails 17, 17 are fixed end plates 2 and fixed support columns 3
Each screw shaft 18 is supported by bearings 19, 19 at the front and rear ends of the rail and penetrates through the channel. The movable platform 15 is suspended from the upper surface of the rail 17 by wheels 20 attached above each of the left and right ends, and the left and right ends, to which nuts 21 are fixed, protrude into the channel of the rail, and the screw shafts 18 is screwed through the nut 21.

In order to integrally rotate the screw shafts 18, 18, a motor 2 with a speed reducer is mounted on the front surface of the fixed end plate 2.
2, and a clutch brake 23 driven by a motor.
An endless belt 26 is stretched in a triangular shape between a pulley 24 attached to the output shaft of the clutch brake and pulleys 25 attached to the front ends of both screw shafts 18. The movable base 15 surrounds the piston of the piston unit 16, and is provided with a male threaded cylinder 27 that projects toward the movable end plate, and a handle 28 is screwed onto the outer periphery of the male threaded cylinder 27. Moreover, the movable end plate 2' has rails 17, 1 with wheels 29, 29 on the rear surface facing the movable base.
An auxiliary stand 30 suspended from the upper surface of the movable stand 30 is fixed, and this auxiliary stand 30 is provided with a recess 31 for receiving the male threaded cylinder 27 of the movable stand, and the piston end of the piston unit is connected to the bottom of the recess. The rear end surface of the periphery abuts the handle 28.

In addition, as shown in FIG. 7, the movable end plate 2' and the adjacent plate, the mutually adjacent plates, and the fixed end plate and the adjacent plate are connected so that a predetermined distance can be maintained between them. The devices 32 are connected by, for example, an X-shaped cross-over link 33 as shown. Preferably, the connection is made at the top and bottom as shown.

Therefore, in order to press the plates into a stacked state between the fixed and movable end plates 2 and 2', the motor 22 operates the clutch brake 23 and the belt transmission devices 24, 25, 2.
6, the screw shafts 18, 18 are rotated in one direction, and the movable base 15 screwed thereto is moved to the rail 17.
moving along the movable end plate 2' toward the fixed end plate;
Push board 6 forward. When all the plates are almost in contact, the motor 22 is stopped, the piston of the piston unit is extended, and the movable end plate 2' pushes all the plates toward the fixed end plate, compressing them into a predetermined stacked state. Then, manually turn the handle 28 on the outer periphery of the male threaded cylinder 27 to bring it into contact with the rear end surface of the auxiliary base 30 of the movable end plate.

The above-mentioned pressing by the piston unit 16 can be stopped automatically by attaching a proximity switch or a limit switch to the rail 17 and having the auxiliary stand 30 of the movable end plate actuate the switch. or,
Stopping the forward motion of the movable base 15 using the screw shaft 18 can be similarly performed using a proximity switch or a limit switch that operates the movable base. When the piston unit 16 presses the movable end plate and the plate toward the fixed end plate, the movable base 15 moves against the screw shaft 1 which is stationary.
Since it is threadedly engaged with 8 and 18, it does not move back.
The reason why the handle 28 is brought into contact with the rear end surface of the auxiliary stand 30 is to maintain the clamped state even if some abnormality occurs in the hydraulic circuit to the piston unit 16 and the piston unit retreats. However, it is not required.

In this way, by compressing all the plates between the end plates 2 and 2', the stock solution is allowed to flow through the liquid passage gap between the opposing plates in contact with the membrane, and is separated into the liquid that has passed through the membrane and the concentrated liquid that has not passed through the membrane. A separation step can be performed.

To perform the opening operation of separating the plates one by one for cleaning, turn the handle 28 in the opposite direction to move the handle 28 backward on the externally threaded cylinder, and at the same time, move the piston back to release the clamping pressure on the plates, and then At 22, the screw shafts 18, 18 are now rotated in the opposite direction, thereby moving the movable table 15 toward the support column 3 together with the movable end plate 2'. In this case, if the plates are connected to each other, and the end plates 2 and 2' and the plates in contact with them are connected by connecting devices 32 as shown in the figure, when the movable end plate 2' moves back a little, the plates in contact with it are connected. When this plate is pulled back by the device and begins to move back a little along with the movable end plate, the plate adjacent to it is pulled by the coupling device and starts moving back, thus moving the movable end plate towards the fixed support column. In addition to moving the board, it is also possible to move the board at a predetermined interval. Moreover, since the connecting device uses a cross link, it is possible to prevent the plate from swinging during movement.

When the movable base 15 has retreated to a predetermined position on the rails 17, 17, the motor 22 is stopped, but this can also be done automatically by a limit switch or proximity switch 34 operated by the movable base or the auxiliary base of the movable end plate. Then, the plates are cleaned, the membrane is replaced, etc., and when finished, the plates are pressed into a stacked state as described above.

The mounting positions of the proximity switches 33 and 34 can be adjusted by moving them along the rail 17.

The clutch brake 23, which transmits the rotation of the motor 22 to the belt transmission device, is driven by the motor to connect the clutch between the input shaft and the output shaft, and release the brake.
When the motor stops, the clutch is disengaged and the brake is activated. Therefore, while the flat membrane device is in operation, the screw shaft 18,
18 will turn unexpectedly and the movable base will not move. It is preferable that this clutch brake is provided with a handle 35 that allows the output shaft to be turned by hand, so that in the event of a power outage, etc., the movable base can be moved forward and backward by turning the handle by hand.

The above-mentioned connecting device 32 is not limited to a cross link, but may be a chain or rope of a certain length. The undiluted solution is supplied from the liquid supply port 13, flows through the liquid passage gaps facing each plate, and finally discharges the concentrated liquid from the liquid drain port 13. However, the present applicant is not limited to this, and the present applicant has disclosed in Japanese Patent Application Laid-Open No. 63-36805 (filed on July 31, 1986) and Japanese Patent Application Laid-Open No. 63-44907 (filed on August 12, 1986). It may also be from the earlier application you proposed. Therefore, in this embodiment, since the bypass path of the above-mentioned prior application is used, the drain port 13 for the concentrated liquid is provided in the fixed end plate 2 in the same manner as the liquid supply port 12, unlike the conventional device shown in FIGS. 8 and 9.

Further, the screw shaft 1 is disposed between the bearing 19 on the fixed end plate side that supports the front end of each screw shaft 18 and the front surface of the movable base 15.
It is preferable to connect a retractable tube 36, for example, a bellows tube, containing the tube 8 to prevent washing water from getting wet.

(Effects of the Invention) According to the present invention, the movable end plate retreats for opening the frame,
The movable end plates are mechanically advanced and pressed to compress the plates into a stacked state, thereby reducing the time required for the work and saving labor.

[Brief explanation of drawings]

Fig. 1 is a side view of the entire embodiment of the flat membrane device of the present invention, Fig. 2 is a front view of Fig. 1 seen from the left, Fig. 3 is an enlarged side view of the main parts, and Fig. 4 is Figure 3 is a front view seen from the left of Figure 3, Figure 5 is a front view of Figure 3 viewed from the right, Figure 6 is a cross-sectional view of Figure 3 taken along the - line in Figure 4.
7 is a side view showing the connection state of each end plate and plate, FIG. 8 is a side view of the entire conventional device,
FIG. 9 is a cross-sectional view showing the device shown in FIG. 8 in an abnormal state, in which 2 is a fixed end plate, 2' is a movable end plate, 6 is a plate, 8 is a liquid collection recess, 8' is a membrane, 9 is the liquid collection part,
9' is a liquid passage gap, 15 is a movable base, 16 is a piston unit, 17 is a rail, and 18 is a screw shaft.

Claims (1)

[Scope of Claims] 1. A liquid collection section with a membrane stretched thereon, and a plurality of plates having liquid passage gaps on both sides of the surface of the membrane, stacked in the front and back direction and arranged in a line between the front and rear fixed end plates and movable end plates. By squeezing and flowing the stock solution into the opposed liquid passage gaps of each plate in contact with the membrane, the stock solution is separated into the liquid that passes through the membrane and is obtained in the liquid collecting section, and the concentrated liquid that does not pass through the membrane. In the flat membrane device, a movable base connected to the movable end plate by a piston unit, and a pair of rails that support the movable base so as to be movable in the same direction as the movable end plate are provided, and the movable base is provided with a movable base that is parallel to the rails. 1. A flat membrane device characterized by having a threaded shaft passing through it and screwed into a movable base. 2. In the flat membrane device according to claim 1, a predetermined interval is maintained between the movable end plate and the adjacent plate, between the mutually adjacent plates, and between the fixed end plate and the adjacent plate. A flat membrane device connected with a connecting device that can be used.