JPH046803Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention supplies a pressurized mixture of powder such as slurry and liquid to a filter chamber defined in a filter frame, and passes the liquid through a filter paper stretched in the filter chamber. Regarding the filter press that squeezes out the liquid, it can be applied to remove liquid from various powders such as powder used as food raw materials in addition to slurry.

Problems to be solved by conventional techniques and ideas Conventional filter presses, for example, as described in Japanese Utility Model Publication No. 54-30698, have a large number of filter holes on a horizontal mounting plate attached to a frame. At the same time, a filter frame with a concave surface that defines a filter chamber between the filter plate and the filter plate is installed above it so that it can be moved up and down. A filter paper is attached through the pipe to cover the concave surface around the tip of the pipe, the filter frame is lowered and pressed against the filter plate, and pressurized slurry is supplied from the pipe into the filter chamber. It is known that a clay cake is produced in the filter chamber by dewatering through filter paper and a filter plate, and the cake is taken out by raising the filter frame. Because the pressing force of the frame and the supply pressure of slurry always act only from above, the filter plate and mounting plate are subject to bending force in one direction, which easily damages their mounting parts, and also causes cake to adhere to the filter frame. There was a drawback that it was difficult to peel off.

Means for Solving the Problems As a means for solving the above problems, the filter press of the present invention has a central part in the length direction of two mutually parallel horizontal guide bars extending between frames. A fixed filter is fixed by passing a mounting plate perpendicular to the mounting plate, and on both sides of the mounting plate, a concave surface is formed, a discharge port is formed on the concave surface, and a filter paper with a smooth surface covering the concave surface is affixed. The frames are attached back to back, and a movable filter frame, which has a concave surface on its surface that defines a filter chamber together with the concave surface of the fixed filter frame and has an outlet formed in the concave surface, is placed in a position facing each fixed filter frame. It is installed so that it can be moved forward and backward along the bar, and a supply pipe that supplies a mixture of powder and liquid such as pressurized slurry passes through the center of the movable filter frame and is attached to the frame. The tip of the supply tube was made to protrude from the concave surface, and a filter paper with a rough surface covering the concave surface was stretched around the tip of the supply tube.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, in which both movable filter frames are moved forward along the guide bar and pressed against the opposing fixed filter frame, and then the powder and liquid, such as slurry, are pressurized into the supply pipe. When the mixture is supplied, the mixture flows between both filter papers while expanding them, and the liquid is squeezed out through the filter papers and discharged from the discharge port, leaving a cake of clay etc. in the filter chamber, and the movable filter frame is moved back and fixed. When separated from the filter frame, the cake adheres to the movable filter frame with the rough surface of the filter paper, is pushed out into the supply pipe, and falls. Since the frames are attached and the movable filter frames are moved horizontally back and forth along the guide bar so that they face each other, the pressing force of the movable filter frames and the mixture of slurry etc. are reduced against each fixed filter frame and the mounting plate. The supply pressure is applied in a well-balanced manner to both the left and right sides, preventing unbalanced bending forces from acting, preventing damage to the fixed filter frame and mounting parts of the mounting plate, and preventing failures over a long period of time. This has the effect of making it possible to operate the filter and to easily take out the cake from the filter frame.

Embodiment Hereinafter, an embodiment in which the present invention is applied to the dehydration of slurry will be described with reference to FIGS. 1 to 3.

Two horizontal guide bars 2 are fixed between the left and right frames 1, which are set apart from each other, at the same height and in parallel positions with a space between them. A vertical mounting plate 3 is passed between the longitudinal centers of 2 and fixed by welding, and a recess 6 with a circular cross section is formed in the center of the surface on both left and right sides of the mounting plate 3. 5 are fixed back to back, and a number of grooves (not shown) are concentrically formed on the inner surface of the recess 6 of each fixed filter frame 5, and a drainage port opening to the outer surface is provided at a lower position on the inner surface of the recess 6. 7 is formed, and a filter paper 9 is pasted on the surface of each fixed filter frame 5 so as to cover the recess 6 with the smooth side of the smooth surface and the rough surface facing outward. There is.

A movable plate 10 is attached to the left and right sides of each of the fixed filter frames 5, respectively, by fitting the fitting grooves 11 formed at both ends into the guide bar 2 so that the movable plate 10 can slide freely. The tips of the piston rods 13 of the two hydraulic cylinders 12 that are attached to both frames 1 in a horizontal position are fixed, and each movable plate 10 moves forward or backward along the guide bar 2 as the piston rods 13 move forward or backward. The front surface of each movable plate 10 is provided with a recess 16 having a circular cross section that pairs with each fixed filter frame 5 and defines a filter chamber 14 together with the recess 6 of the fixed filter frame 5. The movable filter frame 15 formed in A center hole is formed in each of the frame 15 and the movable plate 11, into which the tip of the supply pipe 18 for slurry supply is inserted from the back side, and the filter paper 19 with the center hole formed has a rough surface. The mouth edge of the center hole is fixed to the outside by sandwiching it between two fittings 20 screwed onto the tip of the supply pipe 18, and the outer periphery is attached to the outer periphery where the seal ring 21 of the movable filter frame 15 is fitted. It is fixed and stretched over the
A connecting pipe 23 connected to the rear end of the above-mentioned supply pipe 18
A hose 24 connected to a slurry supply source (not shown) is connected to the middle of the frame 1, and a sliding body 25 screwed onto the frame 1 by closing the rear end of the connecting pipe 23 is freely adjustable in position. It is slidably fitted into the guide tube 26 with an attached bottom plate,
Further, a compression coil spring 2 is provided between a spring receiving ring 28 screwed onto the outer periphery of the rear end of the supply pipe 18 and the movable plate 10.
9 is attached, and the bottom plate 26a of the guide tube 26 serves as a stopper that abuts the sliding body 25 and restricts the retreat of the supply pipe 18.

Next, the operation of this embodiment will be explained.

When the piston rods 13 of the two left and right hydraulic cylinders 12 are advanced from the state shown in FIG. 20 and while pulling the supply pipe 18, it is pressed against the fixed filter frame 5 as shown in FIG. The water in the slurry flows between the filter papers 9 and 19 while spreading them, and the water in the slurry flows between the filter papers 9 and 19.
19 and drained from drain ports 7 and 17,
As shown in the figure, a clay cake a is placed inside the filter chamber 14.
is manufactured, and when the supply of slurry is stopped and the piston rod 13 of the hydraulic cylinder 12 is moved backward, the movable filter frame 15 and the supply pipe 18 are moved back and away from the fixed filter frame 5, and the filter paper 9 of the fixed filter frame 5 is removed.
The surface of the movable filter frame 15 in contact with the cake a is smooth, whereas the surface of the filter paper 19 of the movable filter frame 15 in contact with the cake a is rough, as shown in FIG. When the piston rod 13 is taken out by sticking to the frame 15 and the sliding body 25 hits the bottom plate 26a of the guide tube 26, the piston rod 13 retreats further, as shown in FIG. The supply pipe 18 is relatively protruded forward while being contracted, and the cake a is thereby pushed out from the movable filter frame 15 and falls downward. From then on, by repeating the above operation, the cake a is are produced and taken out in pairs.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an embodiment of the present invention.
FIGS. 2 and 3 are partially cutaway partial plan views illustrating its operation. 1... Frame, 2... Guide bar, 3... Mounting plate, 5... Fixed filter frame, 6... Recess, 7... Drain port, 9... Filter paper, 10... Movable plate, 14... Filter Chamber, 15...Movable filter frame, 16...Concave surface, 17...
Drain port, 19...Filter paper, 12...Hydraulic cylinder,
18... Supply pipe, 20... Fitting.

Claims (1)

[Scope of utility model registration request] A vertical mounting plate is fixed across the lengthwise center of two mutually parallel horizontal guide bars extending between the frames, and both sides of the mounting plate have concave surfaces. Fixed filter frames with discharge ports formed in concave surfaces and filter paper with a smooth surface covering the concave surfaces are attached back to back, and at positions facing each of the fixed filter frames, a filter is installed along with the concave surfaces of the fixed filter frames. A movable filter frame having a concave surface defining a chamber and a discharge port formed on the concave surface is installed so as to be movable forward and backward along the guide bar, and a mixture of pressurized powder such as slurry and liquid is removed. A supply pipe is attached to the frame by passing through the center of the concave surface of the movable filter frame so that the tip of the supply pipe protrudes from the concave surface when the movable filter frame is retracted, and A filter press characterized in that a filter paper with a rough surface is provided to cover the concave surface.