JPS621416A - Automatic nutsche type filter - Google Patents

Abstract

PURPOSE:To obtain an economical apparatus capable of safely and rapidly recovering a cake in a labor saving manner, by organically connecting a circular movable filter frame, a stub shaft driving means, a ring shaped seal packing, plural chutes and a central shaft driving means each having a special structure. CONSTITUTION:Compressed air is introduced to expand a seal packing 8 to closely contact the same with the upper end edge of a filter frame 2 and the lower part of an upper casing 1U is closed by a partition plate 7 and the filter frame 2. An injected slurry is filtered by a filter material 5 and a filtrate is discharged to the outside through a filtrate flow passage 6 and the center fore of a lefthand stub shaft 3L. The cracks generated in the cake on the filter material are spread under pressure by leveling the surface of the cake by falling a rotary arm 11 and rotating a chute 12 to promote the removal of a liquid. Further, after the compressed air of the seal packing 8 is exhausted, the filter frame 2 is reversed around stub shafts 3L-3R by a drive apparatus 9 and the cake on a filter plate 4 is fallen under gravity to be discharged from a cake discharge port 22.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an automatic nuttier filter.

[Conventional technology]

In this type of filter, when the slurry is filtered and the solids contained therein are recovered, the cake deposited on the filter plate has conventionally been removed manually using a tool such as a scoop. A method of scraping off the cake by rotating a scraper, collecting it in the center, and discharging it from the discharge port is adopted.

However, collecting the cake by hand not only requires long hours of hard labor, but also is dangerous as some cakes may be harmful to the human body, and using a rotating scraper requires a long time to remove the cake. Furthermore, it is impossible to completely drain the cake because a base layer is left behind in each batch, and furthermore, it is not easy to thoroughly clean the filter plate using either method.

[Problem that the invention seeks to solve]

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide an economical automatic nuttier filter that can safely, quickly, and labor-savingly recover cake.

Means for Solving Problem C] To this end, the present invention provides a water filter plate at the bottom of the vertical cylindrical casing, and filters the slurry through the door material on the filter plate to separate the cake. In a Nutsche type filter, a pair of left and right ear shafts protruding from both ends of the diameter are pivoted at the bottom of the casing so as to be rotatable around a horizontal axis. a circular movable filtration frame incorporating an F liquid flow path which is discharged to the outside through a central hole; an ear shaft driving means attached to the lower part of the casing and rotating the ear shaft; An annular seal gasket is attached along the lower end of the cylindrical partition plate that projects downward from the casing, and expands when compressed air is introduced to contact the upper edge of the movable filtration frame. a plurality of shoes protruding downward at appropriate intervals on a horizontal arm fixed to the lower end of a central shaft supported rotatably; and a center attached to the upper end of the casing for raising, lowering, and rotating the central shaft. It is characterized by comprising a shaft drive means.

[For production]

With such a configuration, it is possible to obtain an economical automatic Nutsche type filter that can safely, quickly and labor-savingly collect cake.

〔Example〕

An embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a longitudinal cross-sectional view thereof, Fig. 2 is a partially enlarged view showing the section ■ in Fig. 1, and Fig. 3 shows the part shown in Fig. 1. FIG.

In the above figure, 1 indicates an upper casing 1U and a lower casing 1L that are airtightly connected to each other via seven horizontal lunges.
It has a vertical cylindrical casing with a two-sided structure that is airtightly joined during filtration operations and has sufficient strength as a pressure vessel.

Reference numeral 2 denotes a disc-shaped movable filter frame that is rotatably supported around a horizontal axis via a pair of left and right ear shafts 3L and 3R that are provided in the lower casing 1L and extend in the diametrical direction, and 4 is a filter frame. 2 is a porous filter plate stretched across 2 and has a large number of small holes perforated vertically and horizontally; 5 is a door material pasted on the filter plate 4;
Depending on the slurry to be filtered, woven fabric, non-woven fabric,
Wire mesh, ceramics, etc. are used.

6 is a stock solution flow path provided at the bottom of the filter plate 4;
It is formed in a shape 5 to collect the lachrymal fluid that has flowed through the small through hole and discharge it to the outside through the central hole of the left ear shaft 6L through the slanted groove.

7 is a short cylindrical partition plate that protrudes vertically along the inner surface of the lower expanded portion of the upper casing 1U, and has a lower end extending toward the upper end of the flow frame 2; 8 is a partition plate 7; A seal gasket 9 is provided on the lower casing 1L and expands when compressed air is introduced to airtightly seal between the lower end of the partition plate 7 and the upper end of the filter frame 2 in a freely openable and closable manner. A drive device for rotating the right ear shaft 3R of the frame 2, 1
0 is a central shaft that is rotatably supported on the center line of the upper casing 1U, 11 is a horizontal rotating arm whose central part is fixed to the lower end of the central axis 1°, and 12 is the rotating arm 1.
1 is a rectangular shaft projecting horizontally from the lower end of the vertical stay 13 projecting downward at appropriate intervals, and an inclined surface 14 with a downward slope is machined on one end of the shoe 12 in the crushing direction. is,
A convex curved surface 15 having an arcuate cross section is machined on the lower edge of the opposite end in the rolling pressure direction.

Reference numeral 16 denotes a pair of left and right hydraulic cylinders established on the upper end of the upper casing 1U, and a vertical shaft motor 18 for rotating the central shaft 10 via a connecting member 17 is provided at the upper ends thereof.

19 is a circular cleaning pipe provided concentrically in the upper casing and has a plurality of cleaning liquid distribution holes; 20 and 21 are manholes provided near the upper end of the upper casing and in the center of the side wall.

The slurry inlet 22 is a cake discharge port provided at the lower end of the lower casing 1L.

In such a device, a central shaft 10 and a rotating arm 1
1 can be integrally rotated and/or raised and lowered at a set speed by controlling the hydraulic cylinder 16 and the vertical shaft motor 18.

Therefore, first, as shown in FIG.
When the filter frame 2 is brought to a horizontal position and compressed air is introduced into the seal gasket 8 to expand it and bring it into close contact with the upper edge of the filter frame 2, the lower part of the upper casing 1U is connected to the partition plate 7 and the filter frame. It is closed by 2.

Next, the slurry is poured into the slurry inlet 21 of the upper casing.
It is then supplied onto the furnace material 5 of the filter frame. The amount of slurry supplied at this time is controlled by a timer or by detecting the slurry surface on the filter frame using a sensor.

The injected slurry is filtered by the furnace material 5, and the F liquid is discharged to the outside through the F liquid flow path 6 and the center hole of the left ear shaft 6L. This operation is generally carried out by applying a vacuum to the lower casing, but it is also possible to pressurize the upper casing with compressed air or other pressurized gas.

In this way, the deliquified cake on the furnace material 5 is further accelerated, and the cracks that occur in the cake are
By lowering the rotating arm 11 via the hydraulic cylinder 16 and rotating the shoe 12 in the direction of pressure expansion shown by the arrow,
Level the surface and apply pressure to promote dehydration. The spreading pressure of the cake has a squeezing effect and an effect of preventing a short path of fluid from cracks.

If necessary, inject cleaning liquid onto the cake through the cleaning pipe 19 to wash the cake, and if necessary, rotate the rotating arm 11 in the crushing direction of the arrow at the same time as spraying the cleaning liquid. Yes, crumble the cake to enhance the cleaning effect.

In this way, when a series of filtration operations are completed depending on the properties of the slurry, the compressed air in the seal packing 8 is discharged.

Then, the seal packing contracts and separates from the upper end of the filter frame 2, so the drive device 9 moves the filter frame 2 to the ear shaft 3.
When the cake is turned around L-3R as shown by the chain line in FIG. 1, the cake on the filter plate 4 falls by gravity and is discharged through the cake discharge port 22.

At this time, in order to completely separate the cake from the filter plate, the inside of the lower casing 1L is pressurized with compressed air or gas before being turned over, and reverse blowing is also used.

When the cake to be discharged is to be crushed for reasons of subsequent processes, the rotary arm is rotated in the crushing direction and lowered at a slow speed before the cake is discharged.
Break up the cake again.

According to such a device, the following effects can be achieved.

0) The cake can be removed quickly and safely.

(2) The entire amount of cake can be recovered without leaving the base layer on the furnace material.

(5) Since the filter plate is thoroughly cleaned, the filtration cycle for subsequent batches can be accelerated.

〔Effect of the invention〕

In short, according to the present invention, in a Nutstier type filter in which a water filtration plate is provided at the bottom of a vertical cylindrical casing and the slurry is filtered through the furnace material on the filtration plate to separate a cake, both ends of the diameter are It is pivotally supported at the bottom of the casing so as to be rotatable around a horizontal axis via a pair of protruding left and right ear shafts, and collects the lachrymal fluid that has passed through the door material and discharges it to the outside through the central hole of the ear shafts. a circular movable filtration frame with a built-in tear flow path; an ear shaft driving means attached to the lower part of the casing for rotating the ear shaft; and a cylindrical shape concentrically protruding downward from the lower inner surface of the casing. an annular seal gasket attached along the lower edge of the partition plate that expands when compressed air is introduced and contacts the upper edge of the movable filter frame; and a center that is rotatably supported on the center line of the casing. A horizontal arm fixed to the lower end of the palm is provided with a plurality of shoes projecting downward at appropriate intervals, and a central shaft interlocking means attached to the upper end of the casing for raising, lowering and rotating the central shaft. The present invention is extremely useful industrially because it provides an economical automatic nuttier type filter that can recover cake safely, quickly and labor-savingly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a partially enlarged view showing the upper part of FIG. 1, and FIG. 6 is a perspective view showing the part shown in FIG. 1...Casing, IU...Upper casing, 1L
...lower casing, 2...filtration frame, 3゜3L, 3
R... Ear shaft, 4... Filter plate, 5... Door material, 6...
-Filtration channel, 7... Partition plate, 8... Seal packing, 9... Drive device, 10... Center shaft, 11... Rotating arm, 12... Shoe, 16... Stay, 14
... Inclined surface, 15 ... Curved surface, 16 ... Hydraulic cylinder, 17 ... Connection member, 18 ... Vertical shaft motor, 19 -a clean IF, 20 ... Manhole, 21 ...・
・Slurry inlet, 22...cake discharge port. Agent: Masafumi Tsukamoto, Patent Attorney Figure 1: Cake Figure 2: Figure 3

Claims (1)

[Claims] In a Nutsuchie type filter in which a horizontal filtration plate is provided at the bottom of a vertical cylindrical casing and a slurry is filtered and a cake is separated through a filter medium on the filtration plate, the filter is provided with protrusions at both ends of the diameter. A filtrate channel is pivotally supported at the lower part of the casing so as to be rotatable around a horizontal axis via a pair of left and right ear shafts, and collects the filtrate that has passed through the filter medium and discharges it to the outside through the center hole of the ear shaft. a circular movable filtration frame incorporating a circular movable filtration frame; an ear shaft driving means attached to the lower part of the casing for rotating the ear shaft; and a lower end of a cylindrical partition plate concentrically protruding downward from the lower inner surface of the casing. an annular seal packing that is attached along the casing and expands when compressed air is introduced and comes into contact with the upper edge of the movable filtration frame; An automatic nuttie type, characterized in that the horizontal arm is provided with a plurality of shoes projecting downward at appropriate intervals, and a center shaft drive means attached to the upper end of the casing for raising, lowering and rotating the center shaft. filter.