JP3240176U - Swirling flow filter - Google Patents

Abstract

[Problem] To prevent damage and wear of anti-corrosion materials even in the case of mixed water with a high ion concentration such as seawater containing gravel and sand grains as contaminants. provide utensils. A filter includes a cylindrical main container, an upper lid that closes the upper end of the main container, and a bottom plate that closes the lower end. A through hole is formed in the center of the bottom plate, and an outlet pipe is connected to the through hole. It is An inlet pipe for introducing mixed water, which is raw water, is arranged on the wall surface of the main container in the tangential direction of the main container, and the mixed water is configured to form a swirling flow along the inner wall surface of the main container. A contaminant discharge pipe for discharging water containing sedimented contaminants is disposed at the lower end of the outer peripheral surface of the main container. The filtering element is erected at the center of the bottom plate coaxially with the axis of the main container, and has a cylindrical or truncated cone shape (the cross-sectional shape perpendicular to the axis is circular). [Selection drawing] Fig. 1

Description

The present invention relates to a swirling flow filter for filtering and removing contaminants from mixed water, which is raw water containing contaminants (foreign matter).

Raw water taken into water purification plants, water sent from hydroelectric power plant dams to power generators, domestic water that uses running water, agricultural water, and natural freshwater and seawater used for cooling water for industrial machinery contain sediment, rock fragments (pebbles, etc.) ), waste such as wood chips and empty cans, and contaminants with high specific gravity such as small fish and shrimp.

These contaminants must be removed in order to prevent clogging of pipes and damage to mechanical equipment, and for this purpose filters equipped with filtering elements (filters) are used. Among such filters, a swirling flow type filter having a self-cleaning ability to remove dust adhering to the filter body by the swirling force of running water is used in a facility operated without power.

Japanese Patent Application Laid-Open No. 2004-230264

The filter described in Patent Document 1 includes a cylindrical main container, a filtration element provided inside the main container, and an inlet pipe provided tangentially on the side surface of the main container. A block of anti-corrosion material in electrical contact with and in liquid contact with the filtration element (also called galvanic anode for galvanic protection or sacrificial anode) intended to prevent corrosion of the filtration element which is susceptible to corrosion, so-called crevice corrosion. is provided.

The main container, upper lid, bottom plate, filter element, etc. are made of a material containing iron as a main component, preferably steel such as SS400 or SUS304. The bottom plate and the like can be made thicker or lined with rubber to prevent corrosion and extend the service life. However, the filter element is made of punching metal, and the size of the formed filter holes must be such that contaminants that pass through without being filtered do not pose a problem for the device that uses the treated water. Therefore, it is not possible to increase the thickness of the filter element constituent material, and it is not possible to extend the life of the filter element by increasing the thickness.

By arranging such a corrosion-resistant material block, it is possible to prevent troubles caused by leakage of contaminants (foreign matter) to be filtered into the filter element due to corrosion occurring at the lower end of the filter element, and accidents such as breakage due to progress of corrosion. can.

The swirling flow type filter is configured to form a swirling flow between the outer surface of the filtering element and the main container so as to prevent contaminants from clogging the filtering element. There are no contaminants in the treated water that cause problems with the equipment used. For this reason, the anticorrosion material block is arranged outside the filter element so as to prevent the anticorrosion material block from becoming contaminants by being worn and falling off and becoming contaminants in the treated water.

The anti-corrosion material (sacrificial electrode) is made of zinc, aluminum, magnesium, etc. for the purpose of preventing deterioration due to anti-corrosion of the iron filter element when filtering contaminants in mixed water with a high ion concentration such as seawater. , and these corrosion protection blocks are softer and less strong than steel.

For this reason, in the case of a mixed liquid containing a large amount of sand grains and gravel as contaminants, damage and abrasion are likely to occur due to the collision of these, and the anti-corrosion effect disappears in a short period of time. may be subject to damage and repair may be required. For repair, the entire device using the filter must be stopped and repaired, which interferes with the operation.

Even in the case of mixed water (raw water) with a high ion concentration such as seawater containing gravel and sand grains as contaminants, the present invention can prevent damage and wear of anti-corrosion materials. An object of the present invention is to provide a swirling flow filter.

The swirl flow filter of the present invention is a swirl flow filter that separates and removes contaminants from mixed water containing contaminants,
A cylindrical main container, an upper cover arranged on the upper surface of the main container, a bottom plate arranged on the bottom surface of the main container, an inlet pipe arranged tangentially on the circumferential wall surface of the main container, and the mixing An outlet pipe for delivering treated water in which the contaminants have been separated from water, a contaminant discharge pipe for discharging waste liquid containing the separated contaminants, and a cylindrical or truncated conical filter element having filtration holes,
A through hole is formed in the central portion of the bottom plate,
The filtering element is arranged coaxially in the main container on the bottom plate so that the lower opening includes the through hole of the bottom plate,
The outlet pipe is arranged on the outer surface in accordance with the through hole of the bottom plate,
The contaminant discharge pipe is arranged on the bottom wall of the main container in a tangential direction in the forward direction of the swirling flow,
The mixed water introduced from the inlet pipe forms a swirling flow on the outer peripheral surface of the filter element, and the contaminants are removed by the filter element to be treated water, which is discharged and used from the outlet pipe,
A disk made of punching metal is arranged in the upper part of the inner side of the filtering element, and a corrosion-resistant material block is fixed to the side surface of the upper lid of the disk.

According to the swirling flow filter of the present invention, as a result of arranging the anti-corrosion material block inside the filter element formed of punching metal, the contact of the anti-corrosion material block is large enough to damage it, and the height is high. Treated water from which heavy contaminants have been removed, and because the flow rate of the treated water is slowed by passing through the filtration element, anticorrosion material (sacrificial electrode) blocks are included in the treated water Grains, gravel, rock fragments, etc. Abrasion and damage due to collision with hard foreign matter can be prevented.

A perspective view showing an outline of a swirling flow filter. Fig. 2 is a translucent perspective view showing an example in which a disk made of punching metal is arranged in the inner upper part of the filtration element of the swirling flow filter of the present invention, and a corrosion-resistant material block is fixed to the side of the upper lid of the disk.

FIG. 1 is a semi-transparent perspective view illustrating the swirling flow filter of the present invention.
The filter includes a cylindrical main container, an upper lid that closes the upper end of the main container, and a bottom plate that closes the lower end. A through hole is formed in the center of the bottom plate, and an outlet pipe is connected to the through hole. . An inlet pipe for introducing mixed water, which is raw water, is arranged on the wall surface of the main container in the tangential direction of the main container, and the mixed water is configured to form a swirling flow (vortex flow) along the inner wall surface of the main container. ing. A contaminant discharge pipe for discharging water containing sedimented contaminants (waste water) is provided at the lower end of the outer peripheral surface of the main container.

The filtration element is erected in the center of the bottom plate coaxially with the axis of the main container, and has a cylindrical or truncated cone shape (the cross-sectional shape perpendicular to the axis is circular), and the bottom opening is in the bottom plate. It has the same diameter as the formed through hole or a larger diameter, and if it has a larger diameter, it is fixedly arranged on the bottom plate so as to include the through hole.

The upper end of the filter element is configured to be in contact with the upper lid or close to the upper lid with a slight gap to prevent contaminants from flowing into the interior from the upper end.
The outlet pipe has the same diameter as the through-hole of the bottom plate and is fixed to the outer surface of the through-hole, or protrudes into the filter element through the through-hole.

By arranging the inlet pipe tangentially on the outer peripheral surface of the main container, the mixed water forms a swirling flow between the inside of the main container and the outside of the filter element, and contaminants adhere to the surface of the filter element and cause clogging. Clogging of the filter element is prevented by putting the filtered treated water inside the filter element while moving the Contaminants can be eliminated.

The contaminant discharge pipe is arranged at the lower end of the main container in a tangential direction in the forward direction of the swirling flow of the main container. With such a configuration, the separated high-density contaminants can be easily discharged by the wastewater stream.

The inner diameter of the contaminant discharge pipe is 70% or less, preferably 5% or more, of the inner diameter of the inlet pipe. The inner diameter of the contaminant discharge pipe is preferably 60% or less, more preferably 50% or less, of the inner diameter of the inflow pipe. Moreover, the inner diameter of the contaminant discharge pipe is more preferably 10% or more, more preferably 20% or more, of the inner diameter of the inlet pipe.

The arrangement position of the inlet pipe is preferably near the center of the height of the main container.
The inner diameter of the inlet pipe for introducing mixed water, which is raw water, into the main container is 45% or less of the inner diameter of the main container.

The size of the main container is appropriately set according to the application, but the length is 5000 mm or less, preferably 3000 mm or less, and may be 2000 mm or less. The inner diameter is 5000 mm or less, preferably 3000 mm or less, and may be 2000 mm or less.

As for the size of the filtering element, in the case of a cylindrical truncated cone, the large diameter is preferably 90% or less and 60% or more of the inner diameter of the main body container, and the small diameter is equal to or larger than the outlet pipe inner diameter. In the case of a cylindrical shape, it is preferably 80% or less of the inner diameter of the main container and 100% or more of the outer diameter of the outlet tube, more preferably 120% or more, and even more preferably 150% or more.

The filtering element has a large number of filtering holes and is preferably manufactured using punching metal. The shape of the filtration hole is not limited, but a circular shape or a square shape with rounded corners is preferable for ease of processing. The size of the filtration hole is appropriately set depending on the size and shape of contaminants contained in the mixed fluid and the application for which the treated fluid is used. , is preferably 15 mm or less, more preferably 3 mm or more, and more preferably 10 mm or less, further preferably 7 mm or less.

The thickness of the filtration element is preferably 2 mm or more, preferably 5 mm or less, and more preferably 4 mm or less.

It is preferable that the upper end portion of the filter element is provided with a ring disk having an inner diameter that is the same as the upper end opening of the filter element and an outer diameter that is the same as the inner diameter of the main body container.

The lower end of the filter element is fixed to the bottom plate, but the upper end is free. This is to prevent the upper end from wobbling due to swirling flow and the load (bending stress) from being applied to the lower end mounting portion and causing damage. However, if the distance between the upper lid and the upper end of the filter element is narrowed, contaminants do not enter, and even if the filter element moves, it hits the upper lid and is not greatly deformed, so the ring disk is unnecessary.

In addition, two inner diameter reinforcing members are arranged perpendicularly to the inner side of the upper end portion of the filter element in order to prevent deformation of the shape of the upper end.

Although the filter element shown in FIG. 1 has a cylindrical truncated cone shape, it may have a cylindrical shape, and in both cases the cross section perpendicular to the axis is circular.

FIG. 2 is a diagram illustrating a state in which a disk made of punching metal is arranged in the upper part of the inner side of the filter element, and a corrosion-resistant material block is fixed to the side surface of the upper lid of the disk.

The number of anti-corrosion material blocks to be attached is appropriately set according to the political conditions of the mixed water to be treated. In the case of seawater or water with a high degree of acidity, it is necessary to install a large number of them because the wear due to corrosion resistance is severe. Although the method of attaching the anticorrosion material block is not particularly limited, it is simple and preferable to provide a through hole in the anticorrosion material block and attach it with a bolt and nut.

If the size of the anti-corrosion material block is small, it is likely to disappear due to wear, but if it is large, the space required for installation becomes large. The size is appropriately set in consideration of the installation space.

Corrosion resistant material blocks may be provided both on the disk and on the outer peripheral surface of the filter element.
The perforations of the perforated metal discs to which the corrosion protection blocks are attached are preferably the same or smaller than the perforations of the filter element. With such a configuration, even if the anticorrosive material block wears and falls off and enters the treated water, it does not affect the equipment using the treated water.

Although the disc and filter element may be made of different materials, they are preferably made of the same material, and the disc and filter element are mounted in electrical communication.

It can be used for domestic water, environmental water treatment, agriculture, forestry and fisheries, energy, metals, ships, water treatment equipment in the petroleum industry, and removal of metal scraps from cooling water in steel production rolling.

Claims (1)

A swirling flow filter for separating and removing contaminants from mixed water containing contaminants,
A cylindrical main container, an upper cover arranged on the upper surface of the main container, a bottom plate arranged on the bottom surface of the main container, an inlet pipe arranged tangentially on the circumferential wall surface of the main container, and the mixing An outlet pipe for delivering treated water in which the contaminants have been separated from water, a contaminant discharge pipe for discharging waste liquid containing the separated contaminants, and a cylindrical or truncated conical filter element having filtration holes,
A through hole is formed in the central portion of the bottom plate,
The filtering element is arranged coaxially in the main container on the bottom plate so that the lower opening includes the through hole of the bottom plate,
The outlet pipe is arranged on the outer surface in accordance with the through hole of the bottom plate,
The contaminant discharge pipe is arranged on the bottom wall of the main container in a tangential direction in the forward direction of the swirling flow,
The mixed water introduced from the inlet pipe forms a swirling flow on the outer peripheral surface of the filter element, and the contaminants are removed by the filter element to be treated water, which is discharged and used from the outlet pipe,
A swirling flow filter, wherein a disk made of punching metal is arranged in the upper part of the inside of the filter element, and a corrosion-resistant material block is fixed to the side surface of the upper lid of the disk.

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