JPS605211A - Cake discharge apparatus of filter - Google Patents

Abstract

PURPOSE:To easily discharge the cake on a filter disc, in a horizontal filter disc type filter, by rotating the vortex shaped scraping plate provided on the filter disc in relative relation to the filter disc. CONSTITUTION:For example, cross-shaped attaching arms 26 are attached to a rotary shaft piercing through the centers of filter discs 2-4 horizontally and coaxially provided in three stages through keys 27 at every state so as to be made slidable only in the axial core direction. A scraping plate 28 formed by curving an elongated plate in a vortex shape is attached to the under surface of each arm 26 so as to be arranged above each filter disc. In filtering, when a raw liquid containing a large amount of a solid component is flowed into the passages in the filter discs 2-4 and a lid body 5, the solid component is separated end accumulated on the filter cloth 13 of each filter disc as a cake. When a large amount of the cake is accumulated on the filter cloth 13, the residual liquid is flowed out to a receiving tray 20 by high pressure air and, thereafter, the tray 20, filter cloth 18 for the residual liquid and a filter plate 19 are detached while a bucket is placed under the formed lower end opening and the scraping plate 28 is rotated. By this method, the cake on the cloth 13 is scraped off and moved to the inner peripheral side to be dropped into the bucket from a passage cylinder 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for discharging cake on the U1 plate in a filter having horizontal side plates.

A horizontal plate type filter is suitable for filtering a stock solution containing a large amount of solids, but there is a problem in discharging a large amount of cake that accumulates on the filter plate.

Conventionally, when discharging a cake, there is a device in which a filter plate is rotated at high speed by an electric motor, and the cake on the sieve plate is shaken off by centrifugal force. However, with this conventional device, if the cake has strong adhesion and low specific gravity, it is difficult to discharge the cake; is difficult. In addition, a large electric motor is required to rotate the milling board at high speed.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of conventional devices and to provide a cake discharging device with a single filter that facilitates cake discharging.

In order to achieve the above object, the present inventor focused on a scraping plate that is curved in a spiral shape like a mosquito repellent. If a spiral-shaped scraping plate is placed on top of the hidden plate and the scraping plate or filter plate is rotated at the same time, the cake on the bottom plate will be scraped off by the scraping plate and moved in the radial direction of the filter plate. It can be dropped directly from the plate. That is, the present invention provides an f-filter with a horizontal plate, in which a spirally curved scraping plate is arranged above the plate on which cake is deposited, and the plate and the scraping plate are placed relative to each other. This cake discharging device is characterized in that the device is rotatably arranged so that the cake on the filter plate can be scraped off by a scraping plate and dropped from the filter plate by the relative rotation of the device.

In this cake discharging device, the cake on the IJ tray is scraped off by the scraping plate and falls from the filter plate by the relative rotation of the filter plate and the spiral scraping plate above it. Whether it is a small cake or a cake that has accumulated in the center of the filter plate, it is easy to drain. Further, the power required to rotate one or both of the scallop plate and the scraping plate for scraping and moving the cake can be smaller than the power required to rotate the f-banner at high speed for shaking the cake.

Next, examples of the present invention will be described.

The horizontal filter plate type filter equipped with the cake discharge device of this example shown in Figs. 1 and 2 has circular disk-shaped plates (2) and (3) in the vessel body (1). , (4) are arranged concentrically in three stages, and the lid body (5) is placed over the vessel body (1) and its upper opening.
) Attach the lower filter plate (2) to the mounting flange (6) held between
) is suspended from multiple hanging holders (7), and the middle filter plate (3) and upper filter plate (4) are sandwiched between the mounting flange (6) and the lower T-plate (2). and the lower filter plate (2)
A connecting tube (8) vertically installed on the inner periphery of the vessel (1) is fitted into and communicates with a passage tube (9) connected to the bottom plate of the vessel (1), and a stock solution path 00 is connected to the surface of the passage tube (9). and filter plates stacked in three stages (2
), (3), (4+ and the lid communicating with it (
5) Form the inside as a stock solution passage, and 1! of each stage. Board (2).

(3) , (On the top surface of the annular filtrate chamber (1υ formed in The filtrate chamber 0υ of each stage is connected to the stock solution passage through the filter plate 02 covered with a filter cloth (13, and the filtrate chamber 0 of each stage) is connected to the 11th plate (21
, (3), (4) through hole (+411
．． :, 1m is i! Connecting to the outer periphery of the I panel, there are three tiers of laminated boards (2), (3), (41 and the vessel (1)
An overflow channel (19) is connected to the peripheral wall of the vessel (1).An overflow channel (OQ) for undiluted solution is connected to the lid (5), The backwash path αη is branched and connected to the liquid path (lF9), and a
Attach the open plate OI covered with a cloth 0■ via the saucer (A), connect the filtrate passage OD for the residual liquid to the saucer (E), and install the air passage ( b) are branched and connected.

Furthermore, the rotary shaft) is inserted into the bearing tube (c) provided at the center of the upper end of the lid body (5) and the bearing tube (c) provided at the center of the connecting tube (8) of the lower filter plate. and bearings, and filter plates (2
).

(3) , Attach the cross-shaped mounting arms (to) to the rotating shaft passing through the center of 43 in three stages so that they can slide only in the axial direction via the keys (c). Attach an elongated plate to the spirally curved scraping plate () on the lower surface of the mounting arm (to), and connect each stage of the scraping plate (c) to each stage of the filter plate (2) l (
3) , (Place it on top of 11, and attach the mounting arm (c) of each stage.
Insert the snap rings into the rotation shafts at the upper position of the upper mounting arm (A) and the lower position of the lower mounting arm (E), respectively, and then A spiral spring (to) is fitted between the snap ring brackets at the upper position, and the mounting arms (c) at each stage are pressed toward the snap ring bracket at the lower position, and each stage is scraped off. Place the plate (C) in contact with the filter cloth 03 of the M plate in each stage, and then press the lid (
5) Bearing tube - The rotating tube e4 is rotatably attached to the bearing ring (3υ) provided in the upper position, and the rotating shaft (c) protruding from the bearing tube (to) of the lid body is inserted into the rotating tube (2). Press the top edge with the key (
), and attach the handle (b) to the rotating cylinder (2), and then attach the handle (b) to the rotating cylinder (2),
Rotating cylinder 0 due to rotation of l.

The mounting arm (c) and sweeping plate (a) of each stage are installed so as to rotate (on the rotating shaft), and the screw shaft (c) is installed on the upper end plate of the rotating cylinder 0'4 to enable rotation. The threaded part of the screw shaft (end) hanging inside the rotating tube (2) is screwed into the wire hole (end) drilled in the upper end surface of the rotating shaft (E), and the threaded part of the screw shaft (end) A hand) L/@ is attached to the upper end, and the rotation of the handle (B) rotates the screw shaft G9 to raise and lower the rotation shaft (C), and therefore the mounting arm (E) and scraping plate (I) of each stage are moved up and down. ) is designed to be raised and lowered.

When using the filter of this example, a stock solution containing a large amount of solids is supplied to the stock solution path On. Then, the stock solution flows from the liquid path On into the stock solution passages in the II tilting plates (2), (3), (41) and the lid (5), and flows through the filter cloth 03 and the open plate ( The filtrate from which the solid content has been removed after passing through the filter flows into the filtrate chamber (1υ) of each stage, and the solid content forms a cake on the ?IIi cloth (11) of the filter plate of each stage. 1 → 1 → 1 → 1 → 1 → 1 →
The liquid flows into the fighting liquid passage between the Okaiwa (21, (31, (, l)) and the vessel (1), and is taken out of the vessel (1) through the hanging liquid passage 09.

When a large amount of cake is deposited on the filter disk, first, high pressure air is supplied to the air passage (2) in order to drain out the raw solution, that is, the residual liquid remaining in the filter. Then, the high pressure air
From the air passage (A) to the inside of the lid (5) and 0 are the panels (2) and (3)
(4), the residual liquid in the concentrated liquid passage is pressed against the lower passage cylinder (9), and the residual liquid in the passage cylinder (9) is transferred to the filter cloth 011+ for residual liquid and the filter plate 01. The filtrate passes through the saucer.
The cake is deposited on the filter cloth 00, and the filtrate (into the saucer) is taken out through the residual filtrate path c10. After draining the residual liquid, in order to drain the cake, remove the saucer, remove the T8 cloth OQ for the residual liquid and the 1st plate 09, and remove the 5-channel tube (9) from the lower end opening 1111.
A bucket (not shown) is placed in the position, and the scraping plate rotating handle (b) is rotated to rotate the spiral scraping plate (c) of each stage clockwise in FIG. 2. Then, the cake accumulated on the cloth fl'l of each stage is scraped by the filter cloth (11) of the moving plate of each stage, which rotates while sliding on the spiral scraping plate of each stage. Taken, each row of 11 @ boards (2),
The filter media (2), (3), (41) move at a slow speed toward the inner circumference of each stage, fall from the inner circumference of (41), penetrate the passage tube (9), It falls into the bucket. After discharging the cake, in order to backwash the 1st cloth f1.9, rotate the scraping plate lifting hand/I/@, lower the rotation@-, and Strongly abut the scraping plates (c) of each stage against the filter cloth 03 of the moving plate of each stage, and remove the filter cloth (c) by backwashing.
After preventing No. 13 from floating, water is supplied to the backwash path 0η. Then, the backwash water flows from the backwash path 0η to the filtration chamber ση of each stage via the filtrate passage between the vessel body (1) and the moving plates (2), (3), (41) and each through hole α. Then, the filter plate in the filtrate chamber of each stage (after passing through 121 and filter cloth 03 and washing the filter cloth 04, each stage σ) 7 m plate (2).

r3), falling from the inner peripheral edge of <4) and passing through the passage tube (9).
is ejected through the pages.

In the filter of the above-illustrated embodiment, 1 (d) The plate was fixed and the removal plate was rotated, but conversely, the scraping plate was fixed and the moving plate was rotated at the same time. Also, m
The disk and the scraping plate may be rotated in opposite directions; in other words, the moving plate and the scraping plate may be rotated relative to each other.゛Next, we moved the cakes on the various plates to the inner periphery of the moving plate and let them fall from the inner periphery of the moving plate, but we moved them to the outer periphery of the moving plate and let them fall from the outer periphery of the moving plate. You can also do this.

[Brief explanation of the drawing]

FIG. 7 is a vertical sectional front view of a horizontal M-panel type filter equipped with a cake discharge device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional plan view of the same filter. 2, 3, 4: Filter plate 28; Scraping plate patent applicant Shigeru Toda

Claims (1)

[Claims] In a filter in which M disks are installed horizontally, a spirally curved scraping plate is arranged on the filter plate on which cake is deposited, and the filter plate and the scraping plate are arranged so that they can rotate relative to each other. A cake discharging device characterized in that the cake on the filter plate is scraped off by a scraping plate by relative rotation so that the cake can fall from the filter plate.