JPS6354902A - Flat membrane device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) This invention relates to a fruit juice part on which a semi-permeable membrane such as an ultra-Oi membrane or a reverse osmosis membrane is stretched, and a permeable membrane on the surface of the membrane. A plurality of filter plates having liquid gaps on both sides are piled up in the front and back direction and pressed in a row between the front and rear fixed end plates and movable end plates, and the stock solution is brought into contact with the filter membrane in the opposed liquid passage gaps of each furnace plate. This invention relates to a flat membrane device that separates a stock solution into a filtrate obtained in a fruit juice portion by passing through a filter membrane and e-brain fluid that does not pass through a filter membrane.

(Prior Art) Such a flat membrane device is known from Japanese Patent Publication No. 52-10113.

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 once a week, and in the case of food manufacturing processes, they are used every day. A large number of filter plates (approximately 100) in a layered state must be opened and separated one by one, and both end plates and partition plates must be cleaned, and after cleaning, the filter plates will return to a layered state. It is necessary to apply pressure.

In order to separate the filter plates one by one using the conventional device described above, a bolt is passed between the fixed end plate and the movable end plate, and the movable plate is screwed into the bolt that tightens the multiple filter plates between the end plates in a pinched state. After cleaning, the above steps must be reversed by loosening the nuts behind the end plate, removing it from the bolts, and manually moving the movable end plate towards the fixed support column opposite the fixed end plate. , which required a lot of effort and time.

Therefore, in Japanese Patent Application No. 1983 (filed on August 20, 1986), the present applicant proposed a movable base connected to the movable end plate by a piston unit, and a space between the fixed end plate and the fixed support column, which is the same as the movable end plate. A pair of rails are provided to support the movable base movably in the direction, and a screw shaft parallel to the rails is passed through the movable base and screwed into engagement with the movable base, and each end plate and a filter adjacent thereto are provided. It has been proposed to connect the plates and adjacent filter plates to each other with a connecting device that can maintain a constant distance between them, such as a check 7 of a constant length or an X-shaped link.

As a result, in the preceding device, the piston of the piston unit is retracted, the pressure on the filter plate between the movable end plate and the fixed end plate is released, the screw shaft is rotated in one direction, and the movable base screwed into the screw shaft is rotated in one direction. can be moved back along the rail toward the fixed support column along with the movable end plate, and when the movable end plate moves back a little, the filter plate adjacent to it is pulled by the coupling device and begins to move back, and the furnace As the plate retracts a little with the movable end plate, the adjacent filter plate is pulled by the coupling device and begins to retract, thus moving the movable end plate towards the fixed support column, and the oven plate also moves at a predetermined distance. cleaning intervals are automatically created between the movable end plate and the adjacent furnace plate, between the furnace plates, and between the fixed end plate and the adjacent furnace plate.

After cleaning, when the screw shaft is rotated in the opposite direction, the movable base moves forward along the rail while pushing the movable end plates, and the gaps between each end plate and the oven plates and between the oven plates can be eliminated. Then, the rotation of the screw shaft is stopped, the piston of the piston unit y) is extended, and the filter plate can be squeezed between the movable end plate and the fixed end plate.

(Problems to be Solved by the Invention) As described above, in the previous device, by retracting the movable end plates with the movable platform, cleaning intervals can be automatically formed between the furnace plates and between the furnace plates and each end plate. If all of the 100 or so filter plates were to be attached at the same time and the cleaning intervals were to be maintained at the same time, the length of the entire device in the front and back direction would be significantly long, and a large amount of space would be required to install it. do.

(Means for Solving the Problems) Therefore, the present invention provides a large number of filter plates that are provided with a filter membrane and separate the stock solution into a filtrate that has passed through the filter membrane and a concentrated liquid that has not passed through the filter membrane. , comprising front and rear fixed end plates and movable end plates for stacking and compressing the filter plates in a row, and a movable platform for moving the movable end plates in the front and back direction, each of the above end plates and the filter plates adjacent thereto; In a flat membrane device in which adjacent filter plates are connected with each other at a constant interval, the entire large number of filter plates is divided into a plurality of sets in the front and back direction, and the fixed end plate is provided with the divided filter plates. A stopper is provided to prevent the rearmost filter plate of the previous set from retreating, and a moving device is provided for releasing the stopper and retracting the rearmost filter plate of the previous set. shall be.

(Function) As a result, in the present invention, the stopper prevents the rearmost filter plate of the previous set from retreating, so when the movable base moves back together with the movable end plate, cleaning is performed only between the furnace plates of the latter set. A gap is created for the Then, when the cleaning of the later set of plates is completed, the moving device is moved backward, and the moving device releases the stopper, allowing the last filter plate of the set of songs to be moved back. The cleaning gap that was previously formed between the filter plates of the set disappears, and a cleaning gap is created between the filter plates of the previous set.

(Example) Fixed end plate 2 and fixed support column 3 facing each other front and back on bed 1
One movable end plate 5 and a number of filter plates 6 are suspended so as to be movable along the horizontal support member 4 installed between them, and the filter is installed between the fixed end plate 2 and the movable end plate 5. All of the plates are stacked in a row and pressed together to form a flat membrane device.

The fixed end plate has a liquid supply lower a and a liquid drain lower b, which can be used for filtering! ! The stock solution is pumped into the liquid supply lower d, and the concentrated liquid that has not been thoroughly filtered is discharged from the drain lower b.

The stock solution press-injected into the liquid supply lower a comes into contact with the filter membranes on the opposing surfaces of the furnace plates and flows in an upward or downward flow, and the filtrate that has passed through the filter membranes flows through each furnace plate. The concentrated liquid that drips into the water tank 8 on the bed 1 from the surrounding extraction holes and does not pass through the filter membrane is discharged to the drain lower b through a series of openings between the furnace plates. Since the separation mechanism of the filtrate and concentrated liquid is not directly related, the details thereof will be omitted from the conventional examples and prior art devices described above, and further explanation thereof will be omitted.

Now, 9 is a movable base connected to the movable end plate 5 by the piston unit 1G, 11 is a pair of rails that movably supports the movable base 9 in the same direction as the movable end plate, and 12.12 is the rail 11. and a screw shaft for moving the movable carriage which passes through the movable carriage and is threadedly engaged with it, which are the same as in the previous device described above.

That is, the rail 11.11 is a channel with a U-shaped cross section that faces each other and whose ends are fixed to the left and right sides of the fixed end plate 2 and the fixed support column 3, and each screw shaft 12 is connected to the front and rear ends of the rail. Bearing 13. The movable platform 9 has wheels 14 attached to each end of the channel.
The left and right ends, which are suspended from the upper surface of the rail 11 and have fixed nuts 15, protrude into the channel of the rail, and each screw shaft 12 is screwed into the nut 15 thereof.

In order to integrally drive the screw shafts 12 and 12, a motor with a reduction gear [6] and a clutch brake 17 driven by the motor are mounted on the front of the fixed end plate 2, and are attached to the output shaft of the clutch brake. An endless belt 2 is placed between the pulleys 19, 19 attached to the front end of the double screw vehicle 12 and the
0 is stretched into a triangle.

The movable base 9 surrounds the piston of the piston unit 10 and is provided with a male thread 021 protruding toward the movable end plate, and a handle 22 is screwed onto the outer periphery of the male thread 021. Moreover, the movable end plate 5 has wheels 23.degree. 23 on the rear surface facing the movable base and rails 11.
An auxiliary stand 24 suspended from the upper surface of the movable stand 24 is fixed, and this auxiliary stand 24 has a recess 25 for receiving the male threaded cylinder 21 of the movable stand.
The piston end of the piston unit is connected to the bottom of the recess, and the rear end surface around the recess is in contact with the handle 22.

Also, as shown in FIG. 7, there is a movable end plate 5 and a PI! ! A connecting device 261 that can maintain a predetermined distance between adjacent filter plates, mutually adjacent filter plates, and a fixed end plate and an adjacent filter plate, respectively. It is connected. Preferably, the connection is made at the top and bottom as shown.

Therefore, in order to compress the furnace plate into a bedded state between the fixed and movable end plates 2.5, a motor is required! Clutch brake 17 at 6,
Screw shaft 12.1 through belt transmission +8.19.20
A movable base 9 that rotates 2 in one direction and is threadedly engaged with the movable base 9.
is advanced along the rail 11 toward the fixed end plate, and the movable end plate 5, furnace plate 6, etc. are pushed forward.

Is it all boards? When the contact state is reached, stop the motor 16,
Extend the piston of the piston unit and press all the filter plates toward the fixed end plate with the movable end plate 5. Once the filter plates are compressed to a predetermined level, manually turn the handle 22 on the outer periphery of the male threaded cylinder 21 to move the filter plates. The end plate is brought into contact with the rear end surface of the auxiliary stand 24.

The above-mentioned suppression by the piston unit 1G can be stopped automatically by attaching a proximity switch or a limit switch 27 to the rail 11 and having the auxiliary stand 24 of the IH end plate actuate the switch. Also, the screw shaft 12 of the movable base 9
Stopping the forward motion can also be done in the same way using a proximity switch or limit switch that operates the movable base. Then, when the piston unit 1o presses the movable end plate and the filter plate toward the fixed end plate, the movable base 9 is moved to the stationary screw shaft 12.
．． However, the reason why the handle 22 was brought into contact with the rear end surface of the auxiliary stand 24 was because some abnormality occurred in the hydraulic circuit to the piston unit 10.

This is to maintain the pinched state even if the piston unit retreats.

In this way, by compressing all the furnace plates between the end plates 2 and 5, the stock solution is allowed to flow into the liquid passage gap of the opposing furnace plates in contact with the filter membrane.
A separation step can be performed to separate the liquid that has passed through the IP membrane and the concentrated liquid that has not passed through the filter membrane.

To open the furnace plate by separating it into individual plates for cleaning, turn the handle 22 in the opposite direction to move it back on the male thread, and at the same time move the piston back to release the pressure on the filter plate. The motor 16 then rotates the screw shaft 12.12 in the opposite direction, causing the movable base 9 to move back toward the support column 3 together with the movable end plate 5. As a result, when the movable end plate 5 retreats a little, the filter plate adjacent to it is pulled by the coupling device 26 and begins to retreat, and when this oven plate retreats a little together with the movable end plate, the filter plate adjacent to it is pulled by the coupling device 26. The filter plate can be moved at a predetermined distance by moving the movable end plate toward the fixed support column.

In this case, if a cleaning interval is maintained for all of the filter plates between the fixed end plate and the movable end plate, the distance for retracting the movable base and the movable end plate will be extremely long, and the installation space will also be reduced in the front-back direction. will be needed for a long time.

For this reason, in this embodiment, in accordance with the present invention, the entire furnace plate is divided into a front group A and a rear group B each having half the number of C, and the fixed end plate 2 has the last set of the front group A. A stopper 28 is provided to prevent the furnace plate 6a from retreating, and this stopper is released.
A movable mold 2129 is provided for retracting the ancient furnace plate 6a.

The stopper 28 is a bar whose one end is pivotally attached to each left and right side of the fixed end plate and extends slightly diagonally downward.The stopper 28 has a downward notch 30 on the lower surface of the tip, and is attached to the left and right sides of the last furnace plate 6a of the previous group A. Hook the protrusion 31 provided on the side with the L notch 30,
The coupling device 2 is moved back to the extent that the front end filter plate 6b of the latter set is covered.
It is designed so that it will not move back even if you pull it with G (Figure 7).

In this embodiment, the movable type 2!29 has pulleys 3 attached to both left and right ends of a shaft 32 supported by bearings on the front surface of the fixed end plate 2.
3, a pulley 35 attached to both left and right ends of a shaft 34 supported by a bearing on the rear surface of the fixed support column 3, and both pulleys 33,
An endless belt 36 stretched between 35 and 35 is attached to the belt 36, and the notch 30 is lifted up from the protrusion 31 of the furnace plate 6a by lifting the tip of the stator/bag 8, and A pulley shaft 32 consisting of a projecting piece 37 that comes into contact with the front surface and supported by a bearing on a fixed end plate is driven by a motor 38 with a reduction gear that rotates forward and backward.

In this embodiment, the protruding piece 37 is attached to the upper running surface of the belt 36, and in order to prevent this upper running surface from sagging, a lower running surface is supported on the upper surface between the fixed end plate and the fixed support column. Although the cross beam 39 is installed across the belt, the projecting piece 37 may of course be attached to the lower running surface of the belt.

The stopper 28 prevents the notch 30 from tilting diagonally downward compared to the state where the notch 30 is fitted into the protrusion 31 of the furnace plate 6a from above.
In order to do this, a receiving member 40 for receiving one end of the stopper 22 is provided on each side of the fixed end plate 2, and a diagonally facing cam is provided on the lower surface of the tip of the stopper 2 beyond the notch 30. The role of the cam surface 41 provided will be described later.

As described above, the movable end plate 5 is moved back by the movable table 9 to maintain a cleaning interval between all the furnace plates of the latter set. At this time, the protrusion 37 attached to the belt 36 is placed 27y in front of the protrusion 31 of the filter plate 6d on which the stopper 28 is hooked (FIG. 7).

When the movable table 9 has retreated to a predetermined position on the rail 11.11 and a cleaning interval has been created between all the filter plates of the latter set, the motor 16 is stopped. This can be done automatically using a limit switch or proximity switch 42 operated by an auxiliary stand on the plate.

Then, cleaning the filter plate of the next group B, waiting for the tension of the filter membrane, etc. are performed, and when finished, the pulley shaft 32 is driven by the motor 38 to circulate the belt 36, and the protrusion 37 attached to the belt is moved back. (Figure 8).

As a result, the protruding piece 37 slides into contact with the lower surface of the stopper 28 facing diagonally downward and lifts the stopper while retreating.

The notch 30 is released from the protrusion 31 of the filter plate 6a to L, and then comes into contact with the L protrusion 31. Since the notch 30 of the stopper 28 has come off the protrusion 31, the furnace plate 6a is pushed by the protrusion 37 which is retracted by the circulating motion of the belt 36, and starts to retreat.
When it retreats to this extent, it comes into contact with the furnace plate 6b at the front end of the strange group B and pushes it backward, and at the same time pulls the adjacent filter plate in front of L by the connecting device 26 to start retreating.

Therefore, the plates of the later group B come into contact with each other and are pushed backward, and by the time the last filter plate comes into contact with the movable end plate 5, there is a gap between the furnace plates of the previous group A. Cleaning intervals are maintained. If necessary, the movable end plate may be moved back a little further using the movable platform.

In this way, it is possible to clean the board of the previous group A and replace the filter membrane.

After that, or before that, the motor 38 is reversed and the belt 36 returns the protrusion 37 to the front of the notch 30 on the second stopper.As mentioned above, the stopper 28 is stopped by the receiving member 40. Therefore, the protruding piece 37 slides against the cam surface 41 on one side of the tip of the stopper 28 and moves forward to lift the stopper, and it can go under it and return to the front. .

Then move the movable platform 9 to the rail 11. llk to move the filter plate forward, move the entire filter plate forward with the movable end plate 5, and move both sets A as described above.
, B can be pressed and compressed entirely against the fixed end plate 2. At this time, the protrusion 31 of the last furnace plate 6a of the previous set slides into contact with the cam surface 41 of the stopper and lifts the stopper in the same way as the protrusion 37, and when it comes directly under the notch 30, the notch descends and the protrusion 31 to prevent the oven plate 6a and the previous filter plate j[A from retreating again.

The mounting positions of the switches 27 and 42, which determine the forward and backward positions of the movable platform and the auxiliary platform mentioned above, can be adjusted by moving them along the rail II.

The opening of each set of filter plates and the clamping of all sets of filter plates after washing can be controlled by a microcomputer or the like.

Furthermore, the sash in the connecting type 2126 is not limited to a link, but may be a certain length of a chain, a rope, or the like.

In addition, between the bearing on the fixed end plate side that supports the front end of each screw shaft and the front surface of the movable base, an extendable cylinder 1, for example, a bellows cylinder 43 containing the screw shaft is connected, and cleaning water etc. It is a good idea to prevent this.

Furthermore, in this embodiment, the entire filter plate is divided into two sets A and B, which correspond to half of C, but it may also be divided into three or more sets. One end of each stopper of different lengths is pivotally connected to the end plate, and the notch of each stopper, except for the last set, is hooked to the protrusion of the last filter plate of each set, and one moving device, i.e. By operating each stopper using the belt 36 and the protrusion 37, the filter plate sets can be moved backward while turning the filter plate. In this way, the more the number of sets is increased, the shorter the length of the entire device in the front-rear direction can be.

(Effect of the invention) According to the invention, the movable end plate is retracted for opening.

To provide a flat membrane device that mechanically advances and suppresses a movable end plate for compressing a furnace plate into a layered state, thereby shortening the time required for work and saving labor, and having a short length in the front-rear direction. can do.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of an embodiment of the flat membrane device of the present invention;
Figure 2 is a front view of Figure 1 viewed from the left, Figure 3 is an enlarged side view of the main parts, Figure 4 is a front view of Figure 3 viewed from the left, Figure 5 is Figure 3 to the right. Figure 6 is a front view seen from VI- of Figure 4.
Figure 3 is a plan view taken in section along the VI line, Figure 7 is a side view of the latter set of filter plates with the frame opened, and Figure 8 is the front set of filter plates with the plates opened. The side view and FIG. 9 are front views showing the furnace plate, stopper and moving device. In the figure, 2 is the fixed end plate, 5
is a movable end plate, 6 is a furnace plate, 9 is a movable stand, 26 is a coupling device,
28 is a stop bar, and 29 is a moving device.

Claims (1)

[Scope of Claims] A large number of filter plates each having a filter membrane stretched thereon and separating the stock solution into a filtrate that has passed through the filter membrane and a concentrated liquid that has not passed through the filter membrane, and the above-mentioned filter plates stacked in a line. A fixed end plate and a movable end plate are provided before and after the clamping, and a movable platform is provided for moving the movable end plate in the front and back direction, and each of the end plates, a filter plate adjacent thereto, and an adjacent filter plate are mutually separated. In a flat membrane device connected at a constant interval, the entire large number of filter plates is divided into a plurality of groups in the front and back direction, and the fixed end plate includes the last filter plate of the previous group of the divided filter plates. A flat membrane device, characterized in that it is provided with a stopper for preventing the retraction of the filter plate, and a moving device for releasing the stopper and retracting the rearmost filter plate of the previous group.