JPS6249921A - Bag filter - Google Patents

Abstract

PURPOSE:To support and protect the filter cloth of the titled filter without deteriorating the filtering function by using a steel wire as a means for supporting the outer side surface of a bag-shaped filter cloth when a slurry is forced in. CONSTITUTION:When a slurry is filled in a bag-shaped filter cloth 1 under high pressure, the filter cloth 1 is pressed and held by a steel wire 8 when the slurry is filled under pressure. Since the steel wires 8 which abut on the outer peripheral surface of the filter cloth 1 and support the filter cloth 1 are arranged at specified intervals. Consequently, the tearing of the filter cloth 1 due to the excessive expansion is prevented by the support of the steel wire 8 and the spouting of the slurry from the tear is also prevented. Furthermore, since the steel wire 8 is used, the filtering function over the whole surface of the filter cloth 1 is not controlled and the filtering capacity is not deteriorated. Moreover, the lower opening part 1b can be easily and surely opened and closed only by moving an upper plate 3 and the operation efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bag filter that uses a bag-like filter cloth sewn with fibers to separate a stock solution into a liquid I and a residue. It is equipped with a protection device that supports the door cloth when it is filled with high pressure.

Conventional technology Conventionally, when a bag-shaped cloth sewn with this type of fiber is filled with slurry at high pressure from a supply pump, it is necessary to withstand the high pressure, and when high pressure is applied, the pressure is gradually increased. It must also withstand pump pressure. The bag-like p-cloth is usually suspended by a slurry introduction pipe connected to its upper end, and the entire surface of the p-cloth is placed in a free space and supported without any trouble. Conventionally, in order to withstand filtration pressure for a long period of time, a corrugated plate was placed on the side of the cloth to hold down the furnace cloth, or the cloth was completely sealed with a concave plate. provided. However, when the filter cloth is supported on the plate surface as described above, the I-filtration action from the entire surface of the filter cloth is limited to a considerable extent on the plate surface, resulting in a decrease in filtering performance and the phenomenon of clogging of the filter cloth. The disadvantage was that it was accelerated.

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, thereby reducing the filtration effect. It supports and protects the furnace cloth without causing any damage.

Structure of the Invention The present invention has been made to achieve the above-mentioned object, and includes a support member that supports a slurry inlet pipe from which a bag-shaped cloth is hung, and a steel wire is attached in a vertical direction, a horizontal direction, or both vertical and horizontal directions. The steel wires are stretched at intervals, and when the slurry is press-fitted into the filter cloth, these steel wires come into contact with the outer periphery of the filter cloth to protect the filter cloth. For more information,
A bag-like filter cloth made of fibers with a liquid inlet at the center of the upper end and an opening at the lower end that is open when discharging the cake is attached to the stock solution introduction pipe by fixing the liquid inlet, and the stock solution introduction pipe is attached to the upper plate. The upper and lower plates are supported by a support rod that connects them, while a steel wire is stretched vertically between the upper and lower plates, or between the mounting rods fixed between the upper and lower plates. When steel wires are strung horizontally at intervals, or steel wires are strung at predetermined intervals both vertically and horizontally, and the slurry is filled at high pressure into the filter cloth, the filter cloth is strung with steel wires stretched at intervals in the horizontal and vertical directions. The shield cloth is protected by contacting the steel wires at predetermined intervals in the direction or in both the vertical and horizontal directions, and the upper plate is moved to interlock the lower plate, and by moving the lower plate, the gap between adjacent lower plates is The present invention provides a bag filter characterized in that a lower end opening of a door cloth is opened and closed.

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

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

The above-mentioned cloth l is made of coarse fibers sewn into a bag shape, and has a liquid inlet 1a in the center of the upper end, an opening 1b in the lower end, and an adjacent lower plate 5 as described later. When closing the opening 1b and discharging the cake after washing, the lower plate 5 is moved. The liquid inlet 1a of the cloth 1 is fitted into and fixed to a pipe portion 2a protruding from the center of the lower surface of the slurry introduction pipe 2, and the liquid inlet 1a of the cloth 1 is fixed to the bottom of the slurry introduction pipe 2. Inwardly projecting tube portion 2a1.
:@A shape-retaining plate IO that is long in the rear direction is attached with a stopper II, and the shape is maintained so that the hanging filter cloth L protrudes in the front-rear direction. Slurry tubes 2b are protruded from the center of both left and right ends of the slurry introduction tube 2, and a gasket 12 is attached to the circumferential surface of the slurry tube 2, so that when the slurry introduction tubes 2 installed in parallel are connected, the slurry tube 2b can pass through the slurry tube 2b without leaking. Slurry is supplied to each slurry introduction pipe 2 in sequence.

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 I4 is rotatably supported on each hanging fitting t3. The roller 14 is placed on a rail 16 installed between the upper surfaces of stands 15 so as to be freely movable, and the upper plate 3 is suspended between the stands 15 in parallel. The adjacent chains 17 are attached at a distance corresponding to the length of the chains 17, so that the adjacent upper plates 3 can be spaced apart.

The upper ends of support rods 4 made up of two round rods are 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 back, and the lower ends of the support rods 4 have the same shape as the upper plate 3. The lower plate 5 of is fixed. In this way, by connecting and interlocking the lower plate 5 with the upper plate 3 via the support rod 4, the lower end opening 8a of the bag-shaped door cloth 8 is opened and closed by the lower plate 5.

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 connected to the slurry introduction pipes 2 disposed on the other side via pins 19, and in this way,
Each slurry introduction pipe 2 is supported by a link 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 the six holes 3a and 5a. 3°a, 5
°a is drilled. The above-mentioned vertically opposing holes 3a and 5a
Both ends of the mounting rods 7 are inserted between them, respectively, and the mounting rods 7 are erected at four corners between the upper plate 3 and the lower plate 5. Five steel wires 8 made of piano wire are stretched vertically at predetermined intervals between each of the pair of front and rear mounting rods 7 . Each steel wire 8 is stretched so that it just contacts the outer circumferential surface of the r cloth 1 when the slurry is filled into the filter cloth 1 under high pressure, and the expanding central portion extends from the outside of the interval between the steel wires 8. 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. When the movable plate 21 is moved upstream and the parallel upper plate 3 and lower plate 5 are in contact with each other and are in a continuous state, the slurry press-in tube 20 at the upstream end, each slurry introduction tube 2 and the tube 22 at the downstream end are connected in series,
The slurry is filled into the door cloth 1 through each slurry introduction pipe 2 sequentially from the slurry press-in pipe 20.

Next, to explain the operation of this device, when supplying slurry, the upper plate 3 and the lower plate 4 are brought into contact with each other and made to continue.

At that time, the lower end opening tb of each door cloth l is connected to the adjacent lower plate 4.
It is closed between the two. In this manner, the slurry is pumped through the pump while the slurry introduction pipe 2 is continuous, and each door cloth 1 is filled with the stock solution, and after filling, the supply of the slurry is stopped. At the time of filling, Shitofu! As shown in Figure 2, is empty (
I) - Filling 1 = i (II) - High pressure filling (III) As the filter cloth 1 expands, it becomes in a state where the filter cloth 1 is tightened and held by the steel wire 8 during high pressure filling. By holding the steel wire 8, the filter cloth 1 is prevented from expanding excessively and being torn, and
It also prevents slurry from spewing out from the tear. Moreover, since it is a copper wire, it does not restrict the filtering action from the entire surface of the filter cloth 1, and does not reduce the filtering ability. After the required time has passed and the filtration is completed, 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, and the space between the adjacent lower plates 5 opens,
Open the lower end opening lb of the closed door cloth 1. At this time, the support rod 4 moves in conjunction with the upper plate 3, and the links 6A and 6
B opens, moves the supported stock solution introduction tube 2 downward, positions the cloth l exactly between the separated lower plates 5, and securely releases the lower end opening 1b of the cloth l. By this release, the cake inside the filter cloth 1 is discharged from the lower end opening 1b. Similarly, the upper plates 3 are sequentially moved, the spaces between the adjacent lower plates 5 are sequentially opened, and the lower end opening 1b of the filter cloth I is opened to discharge the cake. 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 whole liquid 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 lower plate 5 are separated, and the filter cloth 1 after discharging the cake is closed, and at the same time the next upper plate 3 and lower plate 5 are closed. After opening the door cloth 1 and completing the discharge of the cake, FIG. 5 shows a state in which the mounting rod 7 is attached to the replacement holes 3°a and 5'a.

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

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

Furthermore, 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, and
The steel wire may be stretched diagonally.

As is clear from the above explanation, in the bag filter according to the present invention, when the filter cloth is filled with slurry at high pressure, the steel wire that comes into contact with the outer peripheral surface of the r cloth and supports the a cloth is Because the filter cloth is strung at predetermined intervals, it can withstand repeated loading pressure and overpressure, making it difficult for the filter cloth to tear, and to protect it from tearing. This can prevent slurry from spewing out. Also, since steel wire is used, −
Without restricting the r-filtration effect from the entire surface of the filter cloth in a timely manner, the I-filtration 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, in the present invention, the opening and closing of the lower end opening of the bag-like cloth is
This can be done simply and reliably by simply moving the upper plate, and has various advantages such as improved work efficiency.

[Brief explanation of drawings]

FIG. 1 is a partially sectional front view showing one embodiment of the present invention, and FIG.
The figure is a partially enlarged view of Fig. 1, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, Fig. 4 is a view taken along the line IV-IV in Fig. 3, and Fig. 5 is a difference in the mounting rods. 6 is a front view showing a modified example of the present invention when the cake is properly drained; FIG. 7 is a front view when the cake in FIG. 6 is being discharged; FIG. FIG. 9 is a sectional view taken along the line IX--IX in FIG. 6.

Claims (3)

[Claims] (1) A bag-like filter cloth is suspended with the liquid inlet communicating with the slurry introduction pipe, and steel wires are stretched vertically, horizontally, or both vertically and horizontally at intervals on the support member that supports the slurry introduction pipe. A bag filter characterized in that these steel wires contact the outer periphery of the filter cloth to protect the filter cloth when slurry is press-fitted into the filter cloth. (2) In the bag filter according to claim (1), a liquid inlet communicating with the slurry introduction pipe is provided at the center of the upper end of the bag-like filter cloth, and a lower end opening is closed during filtration, and an upper plate and a lower plate are provided. While supporting and installing with connecting support rods, a steel wire is stretched vertically 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 the filter cloth is filled with slurry at high pressure by stretching steel wires in the horizontal direction, or by stretching steel wires at specified intervals in both the vertical and horizontal directions, the filter cloth is filled with slurry under high pressure. The steel wires are in contact with the filter cloth at a predetermined interval to protect the filter cloth, and the upper plate is moved to interlock the lower plate, and by moving the lower plate, the filter cloth is moved between adjacent lower plates. A bag filter characterized by opening and closing the bottom opening. (3) The bag filter according to claim (1), characterized in that a piano wire is used as the steel wire.