JPH0261287B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bag filter that separates a stock solution into a liquid and a residue using a bag-like cloth sewn with fibers, and particularly relates to a bag filter that uses a bag-like cloth sewn with fibers to separate a stock solution into a liquid and a residue. Sometimes a protective device is provided to support the fabric.

Conventional technology Conventionally, bag-like cloth sewn with this type of fiber has to withstand the high pressure when it is filled with slurry from a supply pump, and when high pressure is applied, it has to withstand the pump pressure that gradually increases. must also hold out. The bag-like cloth is usually suspended by a slurry inlet pipe connected to its upper end, and the entire surface of the cloth is placed in free space and supported without any trouble. In order to withstand a long period of time, there have been conventionally provided fabrics in which a corrugated plate is placed on the side of the fabric and the fabric is held down by the corrugated plate, or in which the fabric is completely sealed with a concave plate. However, when the fabric is supported by the plate surface as described above, the overload from the entire surface of the fabric is limited to a considerable extent by the plate surface, which reduces overperformance and has the disadvantage of accelerating the clogging phenomenon of the fabric. Ta.

OBJECT OF THE INVENTION The present invention aims to solve the above-mentioned conventional drawbacks, and uses a steel wire instead of a plate material as a member to support the outer surface of the bag-like cloth during slurry press-fitting.
It supports and protects the fabric without reducing overload.

Structure of the Invention The present invention has been made to achieve the above-mentioned object, and includes a support member consisting of an upper plate movably suspended from a rail and a support rod connecting the upper plate and the lower plate. While multiple sets are installed in parallel, the slurry introduction pipes are supported by the adjacent support rods and arranged in parallel, and the liquid inlets are communicated with each slurry introduction pipe to suspend the bag-like cloth, and the movement of the upper plate allows the lower plate to move. The lower end opening of the cloth is opened and closed between the adjacent lower plate, and a steel wire is stretched vertically between the upper plate and the lower plate, or a steel wire is stretched vertically between the upper plate and the lower plate. When steel wires are stretched horizontally at intervals between the mounting rods fixed between the lower plates, or steel wires are stretched at specified intervals in both the vertical and horizontal directions, and the slurry is press-fitted into the fabric,
The present invention provides a bag filter characterized in that the steel wires contact the outer periphery of the cloth at predetermined intervals in the vertical direction, the horizontal direction, or both the vertical and horizontal directions to protect the cloth.

Examples Hereinafter, the present invention will be explained in detail with reference to examples shown in the drawings.

Figures 1 to 5 show a first embodiment in which steel wires are stretched horizontally at predetermined intervals;
The bag-like cloth 1 is suspended and supported by a slurry introduction pipe 2, and the slurry introduction pipe 2 is supported by a support member consisting of an upper plate 3, a support rod 4, a lower plate 5, and links 6A and 6B. A mounting rod 7 is erected between the upper plate 3 and lower plate 5 of the member, and a steel wire 8 is stretched horizontally between the mounting rods 7 at a predetermined interval in the vertical direction.

The cloth 1 is made of coarse fibers sewn into a bag shape, and has a liquid inlet 1a at the center of the upper end and an opening 1b at the lower end, as described below.
The opening 1b is closed by sandwiching the opening 1b between adjacent lower plates 5, and when the cake is later discharged, the lower plate 5 is moved and separated to open the opening 1b. The liquid inlet 1a of the cloth 1 is fitted into and fixed to a tube portion 2a protruding from the center of the lower surface of the slurry introduction tube 2, and a shape retaining plate that is long in the front and rear direction is attached to the tube portion 2a protruding into the cloth 1. Attach 10 with stopper 11,
The hanging cloth 1 maintains its shape so as to protrude in the front-rear direction. A slurry inlet 2b is protruded from the center of both left and right ends of the slurry inlet pipe 2, and a gasket 12 is attached to the circumferential surface of the slurry inlet 2b, so that when the slurry inlet pipes 2 installed in parallel are connected, the liquid passes through the slurry inlet 2b one after another without leaking. Slurry is supplied to each slurry introduction pipe 2.

To explain the support member that supports the slurry introduction pipe 2, the upper plate 3 consists of a rectangular horizontal plate that is long in the front and back direction as shown in the figure, and has two hanging fittings 13 protruding from each of the front and rear ends of its upper surface. A roller 14 is rotatably supported on each hanging fitting 13. The roller 14 is movably mounted on a rail 16 installed between the upper surfaces of stands 15, and the upper plate 3 is suspended between the stands 15 in parallel. A chain 17 of a predetermined length is attached between the rollers 14 protruding from the adjacent upper plates 3, and a distance corresponding to the length of the chain 17 is left between adjacent upper plates 3. That's what I do.

The upper end of a support rod 4 consisting of two round rods is fixed to the center of the lower surface of each upper plate 3 in the left-right direction with an interval in the front and rear, and the support rod 4 having the same shape as the upper plate 3 is fixed to the lower end of the support rod 4. The lower plate 5 of is fixed. In this way, the support rod 4
By connecting and interlocking the lower plate 5 and the upper plate 3 through the lower plate 5, the lower end opening 1b of the bag-like cloth 1 is
I'm trying to open and close it.

The lower ends of links 6A and 6B are pivotally attached to the upper side of each of the support rods 4 with pins 18, and the upper end of one link 6A of the rings is connected to the slurry introduction pipe 2 disposed on one side. The upper ends of the links 6B are pivotally attached to the slurry introduction pipes 2 disposed on the other side via pins 19, and in this way, each slurry introduction pipe 2 is linked and supported between adjacent support rods 4.

The upper plate 3 and lower plate 5 of the support member are provided with holes 3a and 5a for inserting mounting rods at the four corners, respectively, and replacement holes are provided at inner positions close to each hole 3a and 5a. 3'a and 5'a are drilled. Both ends of the mounting rods 7 are inserted between the vertically opposing holes 3a and 5a, respectively, and the mounting rods 7 are erected at four corners between the upper plate 3 and the lower plate 5. These mounting rods 7 are provided with steel wires 8 made of piano wire at predetermined intervals in the longitudinal direction between the pair of front and rear mounting rods 7.
It's on full display. Each steel wire 8 is stretched so that it just contacts the outer peripheral surface of the cloth 1 when the slurry is filled into the cloth 1 under high pressure. It's narrow.

A slurry press-in tube 20 through which slurry is pumped from a slurry supply pump (not shown) is fixed to one of the above stands 15, and a movable plate 21 is fixed to the tips of the upper plate 3 and lower plate 5 at the downstream end. A tube 22 whose flow path can be opened and closed is fixed to the movable plate 21. The movable plate 21 is moved upstream,
When the parallel upper plate 3 and lower plate 5 are brought into contact with each other and are in a continuous state, the slurry press-in pipe 20 at the upstream end and each slurry introduction pipe 2 and the downstream end pipe 22 communicate in series, and the slurry press-in pipe 20 Slurry is filled into the fabric 1 through each slurry introduction pipe 2 in sequence.

Next, the operation of this device will be explained. When supplying slurry, the upper plate 3 and the lower plate 5 are brought into contact with each other and made to be continuous. At this time, the lower end opening 1b of each cloth 1 is closed by being sandwiched between the adjacent lower plates 5. in this way,
The slurry is pumped through the slurry introduction pipe 2 in a continuous state, and each cloth 1 is filled with the stock solution. After filling, the supply of the slurry is stopped. At the time of filling,
Cloth 1 is empty () → filled () as shown in Figure 2.
→It expands as high-pressure filling ( ) occurs, and the cloth 1 is tightened and held by the steel wire 8 during high-pressure filling. Holding the steel wire 8 prevents the fabric 1 from expanding excessively and causing tears, and also prevents slurry from spewing out from the tears. Moreover, since it is a steel wire, it does not restrict overload from the entire surface of the cloth 1 and does not reduce overload capacity. After the required time has elapsed, the upper plate 3 at the downstream end is moved downstream and separated from the adjacent upper plate 3 by the length of the chain 17. With this operation, the lower plate 5 also moves,
The space between the adjacent lower plates 5 is opened, and the closed lower end opening 1b of the cloth 1 is opened. At this time, the support rod 4 also moves in conjunction with the upper plate 3, links 6A and 6B open, and the supported slurry introduction pipe 2 moves downward until it is positioned exactly between the lower plate 5 that has separated the cloth 1. to ensure that the lower end opening 1b of the cloth 1 is opened.
By this release, the cake inside the cloth 1 is released into the lower end opening 1b.
Emit more. Similarly, move the upper plate 3 one after another,
The spaces between adjacent lower plates 5 are sequentially opened, the lower end opening 1b of the cloth 1 is opened, and the cake is discharged. When the next upper plate 3 is moved after discharging the cake, the links 6A and 6 of the support rod 4 connected to the upper plate 3 that had separated
Since B supports the slurry introduction pipe 2 in a "V" shape, the upper ends of the links 6A and 6B rise smoothly toward each other, making the upper plate 3 easily movable. In this way, the separated upper plate 3 and lower plate 5 are closed until they come into contact, and at the same time the next upper plate 3 and the lower plate 5 are separated, and the cloth 1 after discharging the cake is closed, and at the same time the next cloth is closed. 1 is opened to complete the cake discharge.

Figure 5 shows holes 3'a and 5'a for replacing the mounting rod 7.
The figure shows the state in which it is installed.

6 to 9 show an embodiment in which the steel wire 8 is stretched vertically, and steel wire stop plates 30 and 31 are provided on the lower surface of the upper plate 3 and the upper surface of the lower plate 5, respectively. It is fixed via bolts 32 and 33. Locking holes 30a, 31a are bored in these steel wire stop plates 30, 31, and hooks 34 attached to both ends of the vertical steel wire 8 are locked, and the hooks 34 are fixed at a predetermined interval in the horizontal direction. The steel wire 8 is stretched vertically.

The steel wire 8 comes into contact with the outer peripheral surface of the cloth 1 in the vertical direction when the slurry is filled into the cloth 1 under high pressure,
It supports the cloth 1.

Further, the present invention is not limited to the above embodiments, and the steel wires may be stretched in combination in the vertical and horizontal directions, or the steel wires may be stretched diagonally.

Effects of the Invention As is clear from the above explanation, in the bag filter according to the present invention, when the cloth is filled with slurry at high pressure, the steel wires that come into contact with the outer peripheral surface of the cloth and support the cloth are spaced apart at a predetermined interval. Because of the tension, the fabric can withstand repeated filling pressures and overpressures, making it difficult for the fabric to tear, and preventing slurry from spewing out from the tears. In addition, since steel wire is used,
This method does not restrict overload from the entire surface of the cloth during overloading, and the overload capacity can be doubled compared to the case where a conventional plate material is used. Furthermore, since it is made of steel wire, it is extremely lightweight, easy to handle, and can be provided at low cost. Furthermore, the present invention has various advantages such as being able to easily and reliably open and close the lower end opening of the bag-like cloth by simply moving the upper plate, improving work efficiency. .

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing one embodiment of the present invention, Fig. 2 is a partially enlarged view of Fig. 1, and Fig. 3 is a partially enlarged view of Fig. 2.
Fig. 4 is a cross-sectional view taken along the - line in Fig. 3, Fig. 5 is a drawing showing a state in which the insertion position of the mounting rod has been changed, and Fig. 6 shows a modification of the present invention. 7 is a front view of FIG. 6 when the cake is being discharged, FIG. 8 is a side view of FIG. 6, and FIG. 9 is a sectional view taken along the line -- of FIG. 6. 1... Cloth, 2... Slurry introduction pipe, 3... Upper plate, 4... Support rod, 5... Lower plate, 6A, 6B...
Link, 7...Mounting rod, 8...Steel wire.

Claims (1)

[Claims] 1. A plurality of sets of support members each consisting of an upper plate movably suspended from a rail and a support rod connecting the upper plate and the lower plate are provided in parallel, and a slurry introduction pipe is connected to the adjacent The bag-like cloth is suspended by connecting the slurry inlet to each slurry inlet pipe, and the lower plate is moved by the movement of the upper plate, and the lower end opening of the cloth is connected to the adjacent lower end. The steel wire can be opened and closed between the upper plate and the lower plate, and a steel wire is stretched vertically with a space between the upper plate and the lower plate, or a space is left between the mounting rods fixed between the upper plate and the lower plate. When a steel wire is strung horizontally or at a predetermined interval both vertically and horizontally, and the slurry is press-fitted into the cloth,
A bag filter characterized in that the steel wires are arranged at predetermined intervals in the vertical direction, the horizontal direction, or both the vertical and horizontal directions to contact the outer peripheral surface of the cloth to protect the cloth. 2. The bag filter according to claim 1, wherein piano wire is used as the steel wire.