JP2001062212A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device formed into a multiple rotating blade structure, dispensed with back washing work, capable of automatically recovering filter function during the operation while keeping the concentration of a fluid to be treated uniform and improved in the continuous operation period and the operation rate. SOLUTION: Two or more pieces of moving rotary bodies with blade having the center of the rotation in common on a concentric axis 3 of the cylindrical filter element 2 are freely rotatably arranged individually along >=2 concentric circle having different diameter, are constituted so that in the order from the inside toward the outside, the moving rotary body 4 with blade positioned at the outer periphery of the cylindrical filter element 2 is a 1st moving rotary body 4, one positioned at the outer periphery of the 1st moving rotary body is a 2nd moving rotary body 5... and the sticking material remaining on the surface of the cylindrical element 2 is scraped while keeping the concentration of the fluid F1 to be treated uniform by stirring the fluid F1 to be treated by the work of plural moving rotary bodies with blade to automatically recover the filtration function during the operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device having a multiple rotating blade mechanism and requiring no backwash.

[0002]

2. Description of the Related Art Conventionally, in a filtering device using a cloth material such as a fibrous material such as a woven fabric, or a wire mesh as a filter material,
The filter medium itself is heavy, the clogging is early due to uneven passage holes, etc., the life of the filter medium is short, and it is often treated as a consumable.

[0003] In addition, as the filtration operation proceeds, as the clogging progresses, the filtration resistance increases and the production efficiency decreases. In order to reduce these drawbacks or to obtain a clear filtrate, a so-called precoat layer is formed using a filter aid, and the clogged surface is scraped off gradually with a scraper or the like as the filtration proceeds, and the surface layer of the precoat layer is removed. It is customary to carry out a filtration operation while updating.

[0004]

However, in the conventional example described above, for example, a filter medium made of cloth is a so-called consumable item,
It must be constantly replaced and renewed, so that the production efficiency is low and the cost is high.

If the specific gravity of the solid matter mixed in the fluid to be treated is large and stagnation or sedimentation is liable to occur, clogging occurs unevenly, and the filtration efficiency is lowered, and uniform filtration operation becomes impossible and the operation is stopped. There are problems such as causing an inevitable state and inducing environmental problems due to frequent disposal of the filter medium.

The present invention has been made in view of the above situation, and has a multiple rotating blade mechanism including a plurality of moving rotating bodies with blades having a mixing and stirring function on the upstream side of a scraper blade, so that a backwash operation is not required. The filter function is capable of automatically recovering the filtration function during operation while scraping off the deposits remaining on the surface of the tubular filter element while maintaining the concentration of the fluid to be treated in a stable manner during the filtration operation. An object of the present invention is to provide a filtration device capable of improving the operation rate.

[0007]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A cylindrical filter element is provided in a housing having an inlet and an outlet for a fluid to be processed and a processed fluid,
A rotating center with two or more blades sharing a center of rotation on a concentric axis of the cylindrical filter element is independently rotatably disposed along two or more concentric circles of different diameters, and sequentially. From the inside to the outside, the one located on the outer periphery of the cylindrical filter element is a first rotating moving body with blades,
What is located on the outer periphery of the first rotating rotator with a blade is referred to as a second rotating rotator with a blade,... A filtration device capable of scraping off deposits remaining on the surface of the tubular filter element while maintaining the concentration of the fluid to be treated uniform, and automatically recovering a filtration function during operation.

(2) The first rotating rotor with blades forms a scraper blade that slides and moves along the surface of the cylindrical filter element, and the cylindrical filter element and the scraper blade are relatively moved. 2. The filtering device according to claim 1, wherein a movable rotating body with a second blade is provided so as to be movable and movable outside or in parallel with the scraper blade.

(3) The cylindrical filter element is formed by molding a sintered material made of ceramic or metal into a porous shape, or using a metal material such as stainless steel, titanium, or a titanium alloy, and forming a perforated shape such as a punching metal. In addition, a wire-shaped substrate was wound to form a substrate having a slit-shaped opening, and powder such as diatomaceous earth, activated carbon, or eggshell was coated on the surface of the substrate with a filter aid layer (precoat layer). 2. The filtering device according to claim 1, wherein the filtering device is used as a filter.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is a longitudinal sectional side view showing a main part of a filtration device according to the present invention, and FIG. 2 is a schematic plan view showing a configuration of a moving rotary body with a scraper blade and stirring blades.

Referring to the drawings, an inlet I for supplying a fluid F1 to be processed and an outlet O for discharging a filtrate F2 of a processed fluid are provided in the housing 1, and a fixing column is provided in the housing 1. 9, a tubular filter element 2 forming a headed tubular body is fixedly provided, and a moving rotary body with two or more blades sharing a center of rotation on a concentric shaft 3 of the tubular filter element 2 is provided. The cylindrical filter element 2 is disposed so as to be rotatable independently along two or more concentric circles having different diameters, and sequentially moves from the inner side to the outer side. The body 4, the one located on the outer periphery of the first bladed moving rotator 4, is referred to as a second bladed moving rotator 5,..., And the first bladed moving rotator 4 is a cylindrical filter element. Scraper that slides and moves along the surface of 2 The cylindrical filter element 2 and the scraper blade are relatively movable, and the second bladed moving rotary body 5 is movable outside or in parallel with the scraper blade. The first and second moving rotating bodies 4 and 5 with blades are disposed.
The blades 4a, 5a are supported by supporting members 4b, 5b, respectively, and their angles can be adjusted. A first bladed moving rotary body 4 forming a scraper blade is fitted to a first rotary shaft 6, and the first The rotating shaft 6 is connected to the driving source M1 to adjust the rotating direction and the rotating speed.
The second rotating shaft 7 is rotatably fitted to the outer side of the moving rotor 5 having the mixing and stirring function.
The second rotating shaft 7 is connected to a driving source M2 via a power transmitting rotating body 8 such as a sprocket or a pulley and a power transmitting member 8a such as a chain or a belt to rotate in a rotational direction.
The rotational speed can be freely adjusted, and the cylindrical filter element 2 is made of a sintered material made of ceramic, metal, or the like in a porous shape, or made of stainless steel,
Titanium, using a metal material such as a titanium alloy, formed into a perforated shape such as punching metal, and also formed a substrate having a shape having a slit-shaped opening by winding the metal material into a wire shape, The surface of these substrates is configured such that powder such as diatomaceous earth, activated carbon, perlite, cellulose powder, or eggshell is used as a filter aid layer (precoat layer).

The cylindrical filter element 2 has a disk-shaped lid fitted and fixed to the top thereof via a sealing member to form a headed cylindrical body, and a support 9 for passing the center of the disk-shaped lid. , Is fixed to the housing 1, and the lower part of the headed cylinder is opened and integrated with the housing 1 having a filtrate outlet O, thereby constituting a filtration device as a whole.

Further, a pressure gauge for detecting the pressure in the filtration device, an air vent for venting the air in the filtration device, and the like are provided.

Further, depending on the characteristics of the fluid to be treated, a triple or quadruple structure may be used as necessary to provide a multiple rotating blade mechanism.

The operation will be described based on the above configuration.

For example, a fluid F1 to be treated mixed with a solid material
Is fed from an inlet portion I by a supply device (not shown), and when passing through a tubular filter element 2 forming a headed tubular body, a shape of a passage hole of a filter aid precoated on the surface of the tubular filter element 2 A filtration operation is performed according to the size, size, etc., and the filtrate F2 that has passed through leaving a residue adhering and remaining on the surface layer of the filter aid layer (precoat layer) passes through the cylindrical filter forming the headed cylinder. It passes through the inside of the element 2 and is led to the outlet O.

In the case where the specific gravity of the solid matter is large and the phenomenon that only the solid matter stays in the fluid to be treated F1 before filtration is likely to occur, the solid matter is coated on the surface of the tubular filter element 2 (the surface of the filter aid layer). The mixing and agitation is performed by rotating the second bladed moving rotator 5 located upstream of the first bladed moving rotator 4 forming the scraper blade so that the processing fluid F1 is supplied in a uniform concentration state. By performing the filtration operation while performing, i.e., since the stirring blade located outside the scraper blade is constantly rotating, a large amount of filtration can be obtained, and the uneven clogging can be prevented. In other words, the scraper blade only needs to be actuated when clogging occurs, and in the case of a normal conventional machine, a backwashing operation is required. In this case, the apparatus must be stopped, and the flow However, in the filtration device equipped with the multiple rotating blade mechanism according to the present invention, the operation of the filtration device is not stopped, and the filtrate is untreated. If the first rotating rotor 4 with blades forming the scraper blade is intermittently or extremely low, for example, if the speed of the outer blade for stirring is set to 10, without mixing into the scraper blade, It is only necessary to operate the speed at a ratio of about 1, thereby preventing clogging and automatically recovering the filtration function during operation, without the need to stop halfway for backwashing operation. Long-term continuous operation becomes possible.

Further, a pressure difference between an inlet side pressure in the housing 1 and an outlet side pressure after passing through the cylindrical filter element 2 and a degree of clarity or concentration of the filtrate are detected, and a computer is operated based on these detection results. The rotation speeds of the first bladed moving rotator 4 that forms the scraper blade and the second bladed moving rotator 5 having the mixing and stirring function are controlled.
The number of rotations, the rotation ratio between the two, and the like can be determined to control the filtration operation.

As for the mounting angles, rotation directions, rotation speeds, etc. of the blades 4a, 5a of the first and second moving rotors 4, 5 with blades, a database in which related information has been acquired in advance is stored in the computer. The control operation can be performed by reading the data as needed.

The shape and number of the scraper blades forming the first rotating blade with blades 4 and the blades having the second, third, etc. mixing and stirring functions after the second rotating blade with blades The number of sets of the movable rotating bodies with the blades, the shape and the number of the blades, and the like need only be selected and determined according to the characteristics of the fluid to be processed, and are not specified.

Further, when this filtration device is used for the purpose of recovery such as concentration, the diameter of the housing and the gap size of the moving rotary body with blades are adjusted, and a separate discharge port is provided below the housing.
What is necessary is just to control and operate the angle and the rotation speed of the mixing and stirring blades so that the fluid to be treated flows forcibly to the cylindrical filter element side.

[0024]

According to the present invention, a moving rotary body with a plurality of blades having a mixing and stirring function is provided on the upstream side of the scraper blade to form a multi-rotating blade mechanism, which eliminates the need for a backwashing operation and stabilizes the filtration operation. It can scrape off the deposits remaining on the surface of the cylindrical filter element while keeping the concentration of the fluid to be treated uniform, and also make it possible to automatically recover the filtration function during operation, thereby improving continuous operation time and operation rate. Take effect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a main part configuration of a filtration device according to the present invention.

FIG. 2 is a schematic plan view showing a configuration of a moving rotating body with a scraper blade and stirring blades.

[Explanation of symbols]

 Reference Signs List 1 housing 2 cylindrical filter element 3 concentric shaft 4 first moving rotor with blade 4a blade 4b support member 5 second moving rotor with blade 5a blade 5b support member 6 first rotating shaft 7 second rotating shaft 8 Power transmission rotating body 8a Power transmission member F1 Fluid to be processed F2 Filtrate (processed fluid) I Inlet O Outlet M1, M2 Drive source

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B01D 29/10 530A

Claims (3)

[Claims] A cylindrical filter element is provided in a housing having an inlet and an outlet for a fluid to be treated and a processed fluid, and two or more blades share a center of rotation on a concentric axis of the cylindrical filter element. A movable rotor is independently and rotatably disposed along two or more concentric circles of different diameters, and sequentially located from the inner side to the outer side on the outer periphery of the cylindrical filter element is a first blade. Moving rotator, which is located on the outer periphery of the first moving rotator with blades,
, And the surface of the cylindrical filter element while stirring the fluid to be treated by the action of the plurality of bladed moving rotators to maintain the concentration of the fluid to be treated uniform. And a filter capable of automatically recovering a filtering function during operation. 2. A moving blade with a first blade forms a scraper blade that slides and moves along the surface of a cylindrical filter element, and the filter element and the scraper blade are relatively movable. 2. The filtering apparatus according to claim 1, wherein a second rotating rotor with blades is provided outside the scraper blade so as to be movable relative to or in parallel with the scraper blade. 3. The cylindrical filter element is formed by molding a sintered material made of ceramic, metal, or the like into a porous shape.
Or, using a metal material such as stainless steel, titanium, titanium alloy or the like, formed a perforated shape such as punching metal, or formed a substrate having a shape having a slit-shaped opening by winding it as a wire shape, 2. The filter according to claim 1, wherein a powder of diatomaceous earth, activated carbon, eggshell or the like is used as a filter aid layer (precoat layer) on the surface of the substrate.