KR20000024471A - Centryfugal separator with reversing filter cloths - Google Patents

Abstract

PURPOSE: A centrifugal dehydrator is provided to perfectly remove a cake in a filter web and to produce a cake with a high yield rate, which does not need to wash the filtering cloth. CONSTITUTION: A centrifugal dehydrator is composed of a body case(1), rotary cylinder(2), a rotary shaft(3), a mobile disk(4), a reciprocal cylinder(8), a filtering cloth(5), a ring(7), a wire(6), a ring guide(10) and an outer rotary drum(11). Herein, the mobile disk(4) is dropped at the lower part of the rotary cylinder, and the dehydration and filtering of the filtering cloth is accomplished in a state of being covered on the inner surface of the rotary cylinder. If the reciprocal cylinder(8) moves up, the mobile disk also moves up. Herein, if the wire is pulled, the ring falls down so that the filtering cloth also falls down, at the same time, is pulled up and is turned over on the upper part of the rotary cylinder. As soon as the filtering cloth is turned over, the edge of the outer rotary drum removes the cake in the filtering cloth, and the cake is pushed up by the mobile disk and is discharged out of the rotary cylinder and the outer rotary drum.

Description

Centrifugal dehydrator for inverting filter cloth to remove cake {Centryfugal separator with reversing filter cloths}

The present invention is to separate the porous network by using the size difference of the particles as a part of the separation device, and in particular in the case of the separation of the liquid and the solid to more effectively achieve the separation of the liquid. Separation of liquids and solids is called dehydration, and centrifugal dehydrator, especially when pressure is generated using centrifugal force.

In addition, this pressure is referred to as a vacuum filter in the case of a vacuum, not a centrifugal force, and in particular, the separation of the slurry liquid mixed with a liquid and a solid between the porous network or the filter cloth is called a press. When the filter cloth is a belt, it is called a belt press. In this case, when the pressure is applied to the slurry itself using a pump, it is called a filter press.

However, the porous network has a certain size of pores, and the size of the pores depends greatly on the particle quality of the solid to be filtered. In case of actual use, this porous network is clogged by solids and the filtration performance is deteriorated. Therefore, filter media such as diatomaceous earth, perlite, etc. are used on the surface of the porous network, or most of the filtered solid cake is removed from the surface. The filter cloth is washed with water or chemicals to keep the filtration performance.

Motivation of the present invention is that the vacuum filter used in the present process is coated with a perlite filter material on the surface of the porous network to remove the slurry and to remove the surface of the filter medium with a blade or the like to keep the filter medium always clean to maintain the filtration performance However, due to the perlite removed by the blade, it was necessary to reapply the perlite to the filter cloth after a certain time and to reduce the manufacturing cost due to the disposal of the perlite. When the cylinder is rotated at high speed, the liquid inside the solid separates due to the specific gravity difference, and the screw inside moves to separate the solid or liquid out of the cylinder in the opposite direction.If there is no specific gravity difference between the liquid and the solid, Heavier and lighter than liquid At the same time, separation is impossible.

In addition, centrifugal dehydrator used in sugar factories is easy to remove from the filter cloth when the dehydrated solid is crystalline and can be dissolved when washed with water. However, the filtration efficiency can be maintained when the viscosity is high, such as insoluble and nonparticulate mud. Falls. It is not suitable for cleaning as well as for attaching to cake removing devices.

Therefore, a device was devised to remove the cake dehydrated from the filter cloth without using another removal device. An example is the Filtration Membrane Flip Centrifuge, published in Announcements 97-4701.

The present invention is a kind of centrifugal dehydrator, which separates and squeezes a liquid from solids using a centrifugal force, and compresses the same as a general dehydrator. The idea of the present invention is that after we decoct the medicine at home and wrap the medicine in the cloth and twisted from both sides, the drug and the medicine residue are separated, the remaining medicine residue on the cloth is used to shake the cloth upside down. In other words, remove the cake attached to the filter cloth after dehydration, shake off the filter cloth, and scrape the cake in the process of inverting it. As the filter cloth is closed, the degree of filter cloth closure is much less than that of a conventional dehydrator, and the equipment for scraping the cake is also rotated at a high speed as part of the cylinder. If the flat blade is fixed inside the cylinder in the conventional manner, the cake cannot be removed by itself when the cake is attached to the flat surface of the cylinder.

In the conventional case, if the blade touches the filter cloth, the blade is stator and the filter cloth rotates together with the cylinder, so it is easy to cause damage of the filter cloth due to friction.

Since the blade of this equipment is the rotating cylinder itself, it rotates with the filter cloth and the relative speed is "0", so there is no fear that the filter cloth is torn due to the friction caused by the high speed rotation.

The difference between the filtration membrane centrifugal separator of Publication No. 97-4701 is that the moving disk moves completely to the outside of the rotating cylinder by the axis length of the rotating cylinder in the design apparatus of 97-4701, and thus the shaft length is extended. In addition, the above equipment requires a lot of power because the moving disk pushes the dehydrated cake at a time, rather than scraping off the dehydrated cake at a time. When the disc comes back into the rotating cylinder after removing the dewatering cake, the loose filter cloth and the high speed rotation require a wide radius body case to prevent collision with the separator body case. When a portion of the filter cloth is folded while the moving disk enters the inside of the rotating cylinder and comes to the bottom half, it is inserted between the moving disk and the rotating body so that the moving disk no longer moves or the filter cloth touches and burns out.

1 is a schematic cross-sectional view of the state of dehydration

2 is a schematic cross-sectional view of the cake completely discharged state

3 is an assembly view of the ring, ring guide, wire

<Description of Drawing>

1: centrifugal dehydrator case, 2: rotating cylinder, 3: rotating shaft, 4: moving disk

5: filter cloth, 6: wire, 7: ring, 8: reciprocating cylinder, 9: moving disk

The configuration of the present invention is the body case (1), the rotating cylinder (2), the rotating shaft (3), the moving disk (4), reciprocating cylinder (8), filter cloth (5), ring (7), ring guide ( 10), wire 6, ring guide 10, external rotating drum 11 and the like.

1 shows a process of dewatering normally. There is a moving disk 4 moving up and down inside the rotating cylinder 2 made of a porous network, and a filter cloth 5 is connected thereto. The movable disk 4 rotates together with the rotary shaft 3 of the rotary cylinder 2, and the shank-and-go movement is performed by the upper reciprocating cylinder 8. The other end of the filter cloth 5 is connected to a ring 7 outside the rotating cylinder 2. The ring 7 is connected to the rear of the movable disk 4 by a wire 6 so that when the movable disk 4 is upward, the ring 7 is lowered and the movable disk 4 is lowered when the ring 7 is lowered. ) Is raised by the filter cloth (5).

2 shows that the movable disk 4 has reached the upper portion of the rotary cylinder 2, the ring 7 is lowered upward of the movable disk 4, and the ring 7 moves the filter cloth 5 at this time. Turn over from the inside of the rotating cylinder to the outside. The upper part of the external rotating drum 11 is used as a cake removing device at the moment of inversion, and the cake is dropped from the filter cloth 5, and the dropped cake does not stick to the outside due to centrifugal force because the external electrolyte drum also rotates at high speed. It is removed out of the rotating drum (11).

In the first stage of dehydration and filtration, the moving disk 4 is lowered to the lower portion of the rotating cylinder 2, and the filter cloth 5 is covered with the inner surface of the rotating cylinder 2. Dehydration and filtration are carried out in the case. If the liquid component remaining in the cake is to be recovered, water can be sprayed onto the cake surface by installing a nozzle moving up and down together with the Wangmok cylinder (8). In the removing step>, when the reciprocating cylinder 8 is moved upward, the movable disk 4 is also moved upward. At this time, when pulling the wire (6) tied to the back of the movable disk (4), the ring (7) outside the rotary cylinder (2) is lowered, and thus the filter cloth (5) connected thereto is also lowered and at the same time the rotary cylinder (2) The inner filter cloth 5 is pulled up and flipped over the top of the rotating cylinder 2. The upper edge of the outer rotating drum 11 completely removes the cake from the filter cloth 5 at the time of inversion, and the cake that has come out of the filter cloth 5 is pushed up by the moving disk 4 and rotated by the centrifugal force to rotate the rotating cylinder and the outer rotating drum. It is discharged to the outside. In the third step of the filter cloth repositioning step, when the shaft of the reciprocating cylinder 8 is lowered, the movable disk 4 is also lowered. At this time, when the filter cloth 5 is pulled out, the filter cloth 5 wrapped around the rotary cylinder 2 is wrapped. Is turned upside down and attached to the inside of the rotating cylinder (2) and the outer ring (7) rises to the top. In this case, when the filter cloth 5 is lowered from the top of the inside of the rotary cylinder 2, the slurry may be supplied from the upper part, and when the filter cloth 5 is to be washed, water may be sprayed from the upper part of the slurry supply part.

The effect of the present invention is that it is not necessary to use the washing water as a general centrifugal dehydrator, so that the amount of water used can be reduced, and the concentration of the treating liquid or the dehydrating cake can be reduced. In the case of general centrifugal dehydrator, when the mud-like substance is removed from the filter cloth, the cake is partially agglomerated and attached to a part of the rotating cylinder so that the weight of the part is more than that of other parts. This leads to a significant reduction in the number of filter fossil burns and, consequently, burnout of rotating cylinders and cylindrical shaft bearings.

In addition, since the filter cloth and the CAKE removal portion on the external rotating drum rotate together at the same speed, the filter cloth is torn by the friction of the blade, and the cake is removed from the filter cloth while the filter cloth is inverted. The blade on the top of the rotating drum presses on the surface of the filter cloth to make sure the cake is removed. Therefore, no residual cake layer is formed on the surface of the filter cloth like a normal dehydrator. If the cake is a product to be obtained, there is no residual layer, so a high yield can be obtained.

Unlike the existing Patent Publication 97-4701, this facility has a short length in the axial direction because the filter cloth moves only on the surface of the rotating cylinder, and the filter cloth is not in contact with the moving disk. There is no case, and the filter case is not loosened, so the body case of the dehydrator may be small. And the strong adhesive cake is mostly removed from the upper portion of the rotating cylinder and removed more cleanly by the upper upper rotating drum, it is completely removed from the filter cloth by the centrifugal force of the rotating cylinder.

Claims (1)

When the movable disk 4 moves upward in the axial direction, the movable disk pulls the ring 7 and the wire 6 to move the filter cloth so that the filter cloth is flipped over the outer side of the rotary cylinder from the top of the rotating cylinder 2, again. How to remove the dehydrated cake by inverting the filter cloth by pulling the filter cloth and attaching it to the inner wall of the rotating cylinder 2 when the movable disk 4 moves downward.