KR20140037457A - Continuous circulating filter and method thereof - Google Patents

Continuous circulating filter and method thereof Download PDF

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Publication number
KR20140037457A
KR20140037457A KR1020120103567A KR20120103567A KR20140037457A KR 20140037457 A KR20140037457 A KR 20140037457A KR 1020120103567 A KR1020120103567 A KR 1020120103567A KR 20120103567 A KR20120103567 A KR 20120103567A KR 20140037457 A KR20140037457 A KR 20140037457A
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KR
South Korea
Prior art keywords
filter
filter medium
pipe
water
sand
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KR1020120103567A
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Korean (ko)
Inventor
주성희
나유미
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코웨이 주식회사
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Priority to KR1020120103567A priority Critical patent/KR20140037457A/en
Publication of KR20140037457A publication Critical patent/KR20140037457A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
    • B01D24/16—Upward filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/38—Feed or discharge devices
    • B01D24/386—Feed or discharge devices internal recirculation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air
    • B01D24/4636—Counter-current flushing, e.g. by air with backwash shoes; with nozzles
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C02F1/64—Heavy metal compounds of iron or manganese

Abstract

The present invention relates to a continuous circulation filter and a method for the same and, more specifically, to a continuous circulation filter and a method for the same, including: a filtering barrel which is formed with a layer of filter medium on the inside, and where the raw water, filtered by the layer of filter medium, moves upward and is discharged after being removed of pollutants; and an air-lift pipe which jets the air, supplied from an air compressor, to transfer the polluted filter medium from the bottom of the filter barrel to the top. The filter medium includes sand and iron, and, in order to reduce the iron, the filter medium also includes a nitrogen supplying pipe for supplying nitrogen.

Description

Continuous circulation filter and method {CONTINUOUS CIRCULATING FILTER AND METHOD THEREOF}

The present invention relates to a continuous circulation filter and a method, and more particularly, to a continuous circulation filter for simultaneously reducing the denitrification with air and nitrogen supply to maintain the continuous removal rate of the iron component acting as the filter medium. It is about.

Continuous circulating sand filters have been developed to allow both sand filtration of influent and washing of sand at the same time. The continuous circulation sand filter according to the prior art is shown in FIGS. 1 and 2.

1 and 2, the continuous circulation sand filter according to the prior art, the raw water passing through the raw water inlet pipe (1) is uniformly dispersed in the sand filtration layer (8) through the raw water distribution pipe (7) , The inflow water from which foreign matters are removed while passing through the sand filtration layer 8 is configured to be discharged to the outside through the treated water outlet pipe 2.

In addition, the contaminated sand at the bottom is conveyed upward through the air lift pipe 4 by the compressed air generated in the compressed air supply unit 5 and moved through the air inlet pipe 6. The sand washing device 10 is installed on the upper portion of the air lift pipe 4 as shown in FIG. 2.

The sand reaching the sand washing apparatus 10 is lowered down through the corrugated pipe 11 in the washing tub 15 to be accumulated on the top of the sand filtration layer 8, and the foreign matter separated from the sand is washed water outlet pipe 3. Is discharged to outside.

The corrugated pipe 11 is installed below the washing tub 15 of the sand washing device 10, so that the treated water moves from the lower end of the corrugated pipe 11 to the upper end while the sand moves zigzag in the corrugated pipe 11. Is separated from the sand during the stagnation inside the corrugated pipe 11 for a while.

The continuous circulating sand filter according to the prior art has a problem in that all of the transport water transferred to the upper portion such as sand through the air lift pipe is discharged to the washing water outlet pipe together with the sand washing water to generate a lot of sand washing water. And it includes a corrugated pipe 11 so that the foreign matter separation is sufficient, in this process, the foreign matter inside the washing tub 15 flows down with the sand and discharged to the treated water discharge unit 2 together with the filtered treated water. There was a problem that could be. In addition, while the sand is stagnant in the sand washing apparatus, there is a problem that the inside of the washing tub and the corrugated pipe of the sand washing apparatus is clogged with sand.

Many patents have been proposed for reducing the occurrence of the sand washing water, which is a problem of the prior art. For example, the Republic of Korea Patent Registration No. 10-0940829 is formed at the bottom of the zigzag flow path of the sand washing machine to form a circulation path for circulating a portion of the treated water rising from the bottom back to the filter tank to minimize the treated water flowing into the contaminated water chamber The present invention suggests an upflow type phosphorus removal sand filter which smoothly lowers the phosphorus-adsorbed sand to increase the cleaning efficiency and further reduces the energy required by the airlift by further installing sand transfer means at the bottom of the airlift pipe.

Most of the sand filter described above can remove solids and phosphorus, but there is a problem that additional injection of iron salt for phosphorus removal is required in addition to the injection of an external carbon source for denitrification in order to increase nutrient removal efficiency such as nitrogen and phosphorus. In addition, even if iron salt is injected, it is difficult to maintain a continuous removal rate, which involves the problem of replacing iron salt.

KR 10-0940829 B

The present invention is to solve the above problems, an object of the present invention is to use the iron component acting as a filter medium through the reduction by the nitrogen supply at the same time as the debed layer using air without replacement, so as to increase its lifespan One continuous circulation filter is provided.

In addition, an object of the present invention is to provide a continuous circulating filtration method to improve the removal efficiency of the organic matter and nutrients of the iron component through the reduction of the iron component by nitrogen supply.

In order to solve the problems of the present invention as described above, the continuous circulating filter according to the present invention, the filter material layer is formed therein and is discharged after the contaminants are removed while the raw water passing through the filter medium is moved upwards. And a filter having an air lift pipe for transporting the contaminated filter medium from the lower part of the filter part to the upper part by injecting air supplied from the air compressor, wherein the filter material comprises sand and iron. A nitrogen supply line for supplying nitrogen for reduction.

In addition, in the continuous circulation filter according to the present invention, the iron component may be one selected from the group consisting of iron oxide coated sand, iron oxide, iron and waste iron.

In addition, in the continuous circulation filter according to the present invention, the nitrogen supply pipe may be installed inside the air lift pipe.

In addition, in the continuous circulation filter according to the present invention, one end of the nitrogen supply pipe may be provided with an diffuser.

In addition, the continuous circulation filter according to the present invention, the inlet pipe for introducing the raw water into the interior of the filter barrel; Raw water distribution pipe for dispersing the raw water introduced through the inlet pipe in the filter medium layer; And a treated water discharge part for discharging the treated water purified by passing raw water from the lower end to the upper end of the sand filter medium layer.

In addition, the continuous circulation filter according to the present invention further comprises an air inlet pipe for forming compressed air and supplying to the lower end of the air lift pipe, the compressed air in the air lift pipe by the force to move upward It is possible to allow the contaminated sand to move upward.

In addition, in the continuous circulation filter according to the present invention, it is installed in contact with the air lift pipe, the transfer water discharge filter to discharge the transport water transported to the upper, such as sand through the air lift pipe and to filter the sand and foreign matter ; A falling induction pipe for lowering sand and foreign substances transferred upward through the air lift pipe; And a foreign matter separation tube for separating foreign matters descending, such as sand, to the outside through suction.

In addition, in the continuous circulation filter according to the present invention, the transport water discharge filter may include a mesh network made of a metal material.

In addition, in the continuous circulation filter according to the present invention, the foreign matter separation pipe is installed with a suction pump can be forced to transfer the foreign matter to the outside.

In addition, in the continuous circulation filter according to the present invention, the transport water discharge filter may be installed on the upper end of the air lift pipe, the transport water can be passed through the transport water discharge filter.

In addition, the continuous circulating filtration method according to the present invention comprises the steps of supplying raw water to the filter medium layer containing sand and iron components and filtering the same while moving the filter medium to the upper side of the filter medium layer, and rising from the bottom to the top. Moving the contaminated filter medium and the transfer water upward through the air to separate it into foreign matter, the filter medium and the transfer water, delayering the surface oxide layer of the iron component, and supplying nitrogen to reduce the iron component; Discharging the separated foreign matter and treated water to the outside, and the separated filter medium is supplied back to the filter medium layer.

In addition, in the continuous circulation method according to the present invention, the iron component may be one selected from the group consisting of iron oxide coated sand, iron oxide, iron and waste iron.

In addition, in the continuous circulation method according to the present invention, the step of separating the filter medium and the feed water into the solid filter medium and foreign matter, and the transfer water of water, and the step of discharging the separated transfer water to the outside together with the treated water And, it may include the step of separating the filter medium and foreign matter.

In addition, in the continuous circulation method according to the invention, the solid-liquid separation can be carried out through a filter.

In addition, in the continuous circulation method according to the invention, the step of separating the filter medium and foreign matter can be separated by lowering the filter medium and foreign matter.

In addition, in the continuous circulation method according to the invention, the foreign matter separated through the falling can be discharged to the outside through the suction.

In addition, in the continuous circulation method according to the present invention, the step of separating the filter medium and foreign matter may be performed through the foreign matter separation tube branched upwardly inclined upwardly from the lower induction pipe and its lower side.

In addition, in the continuous circulation method according to the present invention, the nitrogen supply may be carried out through a nitrogen supply pipe.

Further, in the continuous circulation method according to the present invention, the step of delaminating the surface oxide layer of the iron component and the supplying of nitrogen may be performed at the same time.

According to the continuous circulation filter according to the present invention as described above, by reducing through the nitrogen supply for the continuous use of the iron component acting as the filter medium, the organic matter and nutrient removal ability of the iron component can be effectively maintained.

These drawings are for the purpose of describing an embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is a conceptual view showing a continuous circulation sand filter according to the prior art.
Figure 2 is a conceptual diagram showing a sand washing apparatus of a continuous circulation sand filter according to the prior art.
3 is a conceptual view showing a continuous circulation filter according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be noted that the drawings are for reference only for the purpose of clearly and concretely explaining the preferred embodiments of the present invention and technical ideas or features, and therefore may be different from actual product specifications.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

3 is a conceptual view showing a continuous circulation filter according to the present invention.

Referring to FIG. 3, the continuous circulation filter 100 according to an embodiment of the present invention uses a filter medium to remove contaminants such as nitrogen and phosphorus, which are organic matter and nutrients contained in sewage and wastewater. After the adsorption, the contaminated filter media is cleaned, and the filter media from which the contaminants have been removed is circulated and used repeatedly.

The continuous circulating filter 100 according to the embodiment of the present invention is reduced by supplying nitrogen for the continuous use of the iron component acting as a filter medium, the structure that can effectively maintain the organic matter and nutrient removal ability of the iron component Is made of.

To this end, the continuous circulating filter 100 according to the embodiment of the present invention, basically, the filter tank 20, the inlet pipe 21, the treated water discharge unit 22, the raw water distribution pipe 27 and , Including an air lift pipe 37 and a nitrogen supply pipe 50, which will be described below by configuration.

In the embodiment of the present invention, the filter barrel 20 is formed in a cylindrical upper portion, the lower portion is formed in a conical shape that narrows toward the bottom.

An empty space in which the filter medium is washed and the raw water is filtered is formed inside the filter barrel 20. Inlet pipe 21 is installed on one side of the filter barrel 20 to introduce the raw water into the space. The inlet pipe 21 extends downward, and a raw water distribution pipe 27 is installed at the lower end thereof to increase in diameter downward. Therefore, the raw water introduced through the inlet pipe 21 is moved downwardly in the filter tube 20 along the inlet pipe 21 and spreads when the raw water distribution pipe 27 at the bottom of the inlet pipe 21 is reached.

A filter medium layer 25 made of sand and iron is formed between the inlet pipe 21, the raw water distribution pipe 27, and the inner wall of the filter barrel 20. Since the raw water distribution pipe 27 is buried in the filter medium layer 25, the raw water discharged through the raw water distribution pipe 27 moves upwardly through the air gap formed in the filter medium layer 25. . In this process, the raw water is filtered.

The iron component may be one selected from the group consisting of iron oxide coated sand, iron oxide, iron and waste iron. These iron components remove contaminants from raw water through oxidation / reduction and adsorption. In other words, it breaks down toxic, harmful and pollutants in raw water through oxidation, and decomposes organic coloring components and substances that exhibit odors and unpleasant odors. Oxides layer formed on the iron surface removes organics and nutrients through adsorption. In addition, the iron component removes contaminants through a reducing action of transferring electrons to the anionic contaminants under anaerobic conditions.

In particular, the continuous circulating filter 100 according to the embodiment of the present invention includes a nitrogen supply pipe 50 which will be described later to form anaerobic conditions for the above-described reducing action of the iron component.

The raw water is purified water passing through the filter medium layer 25, the treated water discharge portion 22 is installed on the upper side of the filter tank 20 so that the treated water is automatically discharged when the water rises above a certain level. If the raw water continues to flow in, the water level of the treated water in the filtration tank 20 also continues to rise so that the treated water can be automatically discharged through the treated water discharge unit 22.

The air lift pipe 37 extends above the filter medium layer 25 from the lowest end of the filter cylinder 20,

At the bottom of the air lift pipe 37, the contaminated filter medium at the bottom of the filter medium layer 25 is introduced and moves upward through the interior of the air lift pipe 37 together with the compressed air introduced through the air inlet pipe 31.

An air inlet pipe 31 is installed at the inner side of the inlet pipe 21 and the raw water distribution pipe 27 together with the air lift pipe 37. The air inlet pipe 31 is installed inside the air lift pipe 37 which is the center of the filter cylinder 20. The air inlet pipe 31 extends through the upper part of the filter box 20 to the lower part of the filter box 20. The air inlet pipe 31 receives compressed air from the outside and receives the contaminated filter medium formed in the filter medium layer 25 below the filter cylinder 20 through its kinetic energy through the interior of the air lift tube 37. Move to the upper side of.

In addition, the lower end of the air lift pipe 37 is located below the lower end of the air inlet pipe 31, the compressed air entering the air inlet pipe 31 through the bottom of the air inlet pipe 31 through the air lift pipe ( 37) flows to the bottom. Contaminated sand capturing contaminants is raised to the upper side by air supplied from the lower side, and foreign matter is separated from the contaminated sand by air disturbance. In addition, the iron component which rises upward with the sand is delaminated because the outer oxide layer is physically destroyed by the air.

In the embodiment of the present invention, the nitrogen supply pipe 50 is for supplying nitrogen to help the reduction action of iron.

To this end, the nitrogen supply pipe 50 is installed inside the air lift pipe 37. Nitrogen is supplied into the air lift pipe 37 through the nitrogen supply pipe 50. Accordingly, the iron component moving from the lower part to the upper part of the air lift pipe 37 is formed under anaerobic conditions by the supplied nitrogen, and is thus reduced.

That is, the iron component acting as the filter medium moves from the lower side to the upper side inside the air lift pipe 37, and the reduction by the nitrogen supply is performed at the same time as the deoxidation layer of the external oxide layer by air, thereby maintaining the continuous removal rate. .

Therefore, the reduced iron component is supplied to the upper filter medium layer 25 again to reduce the anionic contaminants in the raw water, thereby removing the contaminants.

At this time, one end of the nitrogen supply pipe 50 may be provided with an diffuser, such as a membrane diffuser (membrane diffuser) to micro-bubble the injection of nitrogen supplied. Since the diffuser is made of well-known techniques well known in the art, a more detailed description of the configuration will be omitted herein.

An upper portion of the air lift pipe 37 is provided with a feed water discharge filter 40 and a lower induction pipe 41.

The transport water discharge filter 40 is connected to the upper end of the air lift pipe 37, and the descending induction pipe 41 is branched inclined downward from the top of the air lift pipe 37. The end of the lower induction pipe 41 is open. The foreign material separation pipe 42 is formed by being branched upwardly inclined from the bottom side of the falling induction pipe 41. The foreign matter separation tube 42 extends to the outside of the filter barrel 20, the suction pump 43 is installed on the outer portion of the filter barrel 20.

The pores formed in the transport water discharge filter 40 are formed to have a smaller size than the sand or iron filter medium or foreign matter. Therefore, water and air may pass through the transport water discharge filter 40, but sand, iron components, and foreign substances may not pass. The feed water discharge filter 40 includes a mesh network made of a metal material.

The substances moving upward along the air lift pipe 37 are contaminated filter media, water (transport water), and air. Among the contaminated filter media, foreign substances and the filter media are separated in the process of moving upward. Therefore, the substance which reaches the upper part of the air lift pipe 37 can be divided into sand, iron component, water, air, and a foreign substance. Among these, air is discharged through the open upper portion of the transfer water discharge filter, and water is discharged to the outside through the transfer water discharge filter and discharged to the treated water discharge unit 22 together with the treated water.

When the suction pump 43 is in operation, the pollutants and the contaminants in the filter medium moving along the down induction pipe 41 may be discharged to the outside through the foreign matter separating pipe 42, and the filter medium is heavy Fall down through the open bottom of the induction pipe (41).

Purified filter medium dropped through the lower end of the induction pipe 41 is accumulated on the upper end of the filter medium layer (25). Through this process, the filter medium layer is continuously circulated from the bottom to the top, and is washed and reduced, and the raw water introduced through the inlet pipe 21 is purified through the filter medium layer 25 and discharged to the treated water outlet 22. The filter medium washing water containing the foreign matter is discharged to the outside through the foreign matter separation pipe (42). Therefore, while the purification of the raw water and the washing and reducing of the filter medium are simultaneously performed, only the filter medium washing water containing contaminants is discharged to the outside.

Continuous circulating filter according to the present invention is a nitrogen supply pipe 50 is installed to maintain the continuous removal rate of the iron component, the physical delamination of the oxide layer using air for the iron component acting as the filter medium, cleaning the contaminants at the same time supply nitrogen Reduction by may occur at the same time.

In addition, the continuous circulation filter according to the present invention is that the transfer water discharge filter 40, the lower induction pipe 41 and the foreign matter separation pipe 42 is installed on the upper portion of the air lift pipe 37, the transfer water discharge filter ( At 40), the transport water is discharged to the outside, thereby minimizing the generation of filter media wash water, and forcibly discharging foreign substances through the suction pump 43, thereby preventing foreign substances from contaminating the treated water and improving the speed of washing the filter media. Can be.

Next, a continuous circulation filtration method according to an embodiment of the present invention will be described.

Continuous circulation filtration method according to an embodiment of the present invention,

Supplying raw water to the filter medium layer including sand and iron and filtering the same while moving the filter water to the upper side of the filter medium layer to generate treated water;

Moving the contaminated filter medium and the feed water upward through the air rising from the bottom to the upper side to separate the foreign matter, the filter medium and the feed water, and delayering the surface oxide layer of the iron component;

Supplying nitrogen to reduce the iron component;

The separated foreign matter and the treated water is discharged to the outside, and the separated filter medium comprises the step of supplying again to the filter medium layer.

Hereinafter, each step will be described in detail.

First, raw water is supplied to the filter medium layer containing sand and iron, and filtered while moving the filter material layer upward to generate treated water. At this time, the raw water passes through the filter material layer and moves upwards to remove contaminants and produce treated water, and sand filters the raw water to capture contaminants. In addition, iron removes contaminants from raw water through oxidation / reduction and adsorption.

Next, the contaminated filter medium and the transfer water are moved upward through the air rising from the bottom to the upper side to separate the foreign matter, the filter medium and the transfer water, and the surface oxide layer of the iron component is delaminated. The contaminated sand and iron components that captured the contaminants are raised to the upper side by the air supplied from the lower side. At this time, foreign substances are separated from the contaminated sand by the air disturbance, and the oxide layer on the iron surface is physically delaminated. This is done. Preferably, the contaminated filter medium and the feed water move upward through an air lift tube installed perpendicular to the filter medium layer, and the air supply is made through an air inlet pipe installed inside the air lift tube.

Subsequently, nitrogen is supplied to reduce the iron component.

This nitrogen supply is to maintain anaerobic conditions to promote the reduction mechanism of the iron component in the filtration process of the raw water.

Nitrogen is supplied to the iron component which rises to the upper side by the air supplied from the lower side, and the iron is reduced accordingly, and contaminants can be removed according to the reducing action when circulating back to the filter medium layer 25. At this time, the nitrogen supply is made through a nitrogen supply pipe installed inside the air lift pipe.

Preferably, the step of delaminating the surface oxide layer of the iron component and the supplying of nitrogen are carried out simultaneously.

Subsequently, the separated foreign matter and the treated water are discharged to the outside, and the separated filter medium is supplied to the filter medium layer again.

The treated water is discharged to the outside and the separated foreign matter is discharged to the outside for disposal. In addition, the separated filter medium is fed back to the filter medium layer to ensure a continuous filtration process.

In this case, by first separating the transport water and discharging it to the outside, in order to minimize the occurrence of sand washing water,

Solid-liquid separation of the separated foreign matter, the filter medium and the transfer water into the filter medium and the foreign matter and the transfer water which is water;

Discharging the separated transport water together with the treated water to the outside;

Separating the filter medium and foreign matter may be performed.

That is, the foreign matter, the filter medium and the transfer water separated and moved to the upper portion are separated into the filter medium and the foreign matter and the transfer water which is moisture. At this time, the solid-liquid separation is preferably performed through a filter. The pores formed in the filter are formed smaller than the filter medium and the foreign matter, so that the filter medium and the foreign matter is separated through the filter to achieve solid-liquid separation.

Subsequently, the separated transport water is discharged to the outside together with the treated water. The transport water separated from the solid filter medium and foreign matter is discharged to the outside together with the treated water.

Next, the solid sand and the foreign matter is separated.

Separate the transport water and the separated solids with filter media and foreign substances, respectively. At this time, the solids are induced to fall and separated into the filter medium and foreign matter by the weight difference. For this purpose, a descending induction pipe and a foreign material separation pipe branched upwardly inclined from the bottom side thereof are used. Therefore, the filter medium heavier than the foreign matter falls down through the open bottom of the falling induction pipe into the filter medium layer, and the foreign matter is discharged to the outside by the suction force of the suction pump through the foreign matter separation tube.

According to the embodiment of the present invention as described so far, it is possible to use the iron component acting as a filter medium through the reduction by nitrogen supply without replacement, and increase its lifespan.

In addition, by separating the separated foreign matter, the filter medium and the transport water while moving upward through the air lift pipe, and first discharge the transport water to the outside, it is possible to minimize the generation of the filter medium wash water.

As described above, the deoxidation of the oxide layer using air to the iron component serving as the filter medium and the reduction by the nitrogen supply are simultaneously performed, thereby maintaining the continuous removal rate.

In addition, since the conveyed water is preferentially separated and discharged together with the treated water, the conveyed water can be prevented from disturbing the separation of the sand and the foreign matter, thereby effectively separating the sand and the foreign matter.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

21 Inlet pipe 22 Treatment water outlet
25 Filter media 27 Raw water distribution pipe
31 Air inlet pipe 37 Air lift pipe
40 Transfer water discharge filter 41 Lower induction pipe
42 Foreign material separation pipe 43 Suction pump
50 nitrogen supply pipe 51 diffuser

Claims (19)

A filter medium is formed therein and the filter can be discharged after the contaminant is removed while the raw water passing through the filter medium is moved upwards; and by spraying the air supplied from the air compressor to the top of the contaminated filter medium from the bottom of the filter A filter having an air lift pipe for conveying to a furnace,
The filter medium includes sand and iron components,
Nitrogen supply pipe for supplying nitrogen to reduce the iron component
Continuous circulation filter comprising a. The method of claim 1, wherein the iron component is
A continuous circulating filter, characterized in that it is one selected from the group consisting of iron oxide coated sand, iron oxide, iron and waste iron. The continuous circulation filter according to claim 1, wherein the nitrogen supply pipe is installed inside the air lift pipe. The continuous circulation filter according to claim 3, wherein an acid pipe is installed at one end of the nitrogen supply pipe. The method of claim 1, wherein the filter
An inlet pipe for introducing raw water into the filter barrel;
Raw water distribution pipe for dispersing the raw water introduced through the inlet pipe in the filter medium layer; And
Treatment water discharge part for discharging the treated water purified by passing the raw water from the lower end of the sand filter medium layer to the upper end
Continuous circulation filter comprising a. The method of claim 1,
And further comprising an air inlet pipe which forms compressed air and supplies it to the lower end of the air lift pipe, such that the contaminated sand in the air lift pipe moves upward by a force of the compressed air moving upward. Circulating filter. The method of claim 1,
A transport water discharge filter installed to be in contact with the air lift pipe and discharging the transport water transported upward through the air lift pipe, such as sand, to filter sand and foreign matter;
A falling induction pipe for lowering sand and foreign substances transferred upward through the air lift pipe; And
Foreign body separation pipe for separating foreign matter descending, such as sand to the outside through suction;
Continuous circulation filter comprising a. 8. The method of claim 7,
The transport water discharge filter is a continuous circulation filter, characterized in that it comprises a mesh made of a metal material. 8. The method of claim 7,
The foreign material separation pipe is a continuous circulation filter characterized in that the suction pump is installed to force the foreign material to the outside. 8. The method of claim 7,
The transport water discharge filter is installed on the upper end of the air lift pipe, the continuous circulation filter, characterized in that the transport water passes through the transport water discharge filter. Supplying raw water to the filter medium layer including sand and iron and filtering the same while moving the filter water to the upper side of the filter medium layer to generate treated water;
Moving the contaminated filter medium and the feed water upward through the air rising from the bottom to the upper side to separate the foreign matter, the filter medium and the feed water, and delayering the surface oxide layer of the iron component;
Supplying nitrogen to reduce the iron component;
Discharging the separated foreign matter and treated water to the outside, and supplying the separated filter medium back to the filter medium layer.
Continuous circulation filtration method comprising a. The method of claim 11, wherein the iron component is
Continuous circulation filtration method, characterized in that the iron oxide coated sand, iron oxide, iron and one selected from the group consisting of waste iron. 12. The method of claim 11,
Solid-liquid separation of the filter medium and the feed water into the filter medium and foreign matter as a solid, and the transfer water as water;
Discharging the separated transport water together with the treated water to the outside;
Separating foreign matter from the filter medium
Continuous circulation filtration method comprising a. The method of claim 11, wherein the solid-liquid separation is
Continuous circulation filtration method characterized in that carried out through a filter. The method of claim 11, wherein the separating the filter medium and foreign matter is
Continuous circulation filtration method characterized in that the separation by separating the filter medium and foreign matter. 16. The continuous circulation filtration method according to claim 15, wherein the foreign matter separated by the lowering is discharged to the outside through suction. The method of claim 11, wherein the separating the filter medium and foreign matter is
Continuous circulating filtration method characterized in that carried out through the foreign matter separation pipe branched upwardly inclined from the lower induction pipe and its lower side. The continuous circulating filtration method of claim 11, wherein the nitrogen supply is performed through a nitrogen supply pipe. 12. The continuous circulation filtration method according to claim 11, wherein the deoxidizing the surface oxide layer of the iron component and the supplying of nitrogen are performed simultaneously.
KR1020120103567A 2012-09-18 2012-09-18 Continuous circulating filter and method thereof KR20140037457A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106390584A (en) * 2016-10-29 2017-02-15 安徽省光明粮油工业有限公司 Automatic filtering device
CN107399725A (en) * 2016-05-19 2017-11-28 拜默实验设备（上海）股份有限公司 A kind of nitrogen gas generator
CN107617246A (en) * 2017-09-27 2018-01-23 莱州金生水环保科技有限公司 It is a kind of to be used to destroy the hardened mozzle of husky cylinder water purifier filtrate
CN110193219A (en) * 2019-04-28 2019-09-03 永联印刷耗材（深圳）有限公司 Print developer solution circulating filtration equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107399725A (en) * 2016-05-19 2017-11-28 拜默实验设备（上海）股份有限公司 A kind of nitrogen gas generator
CN106390584A (en) * 2016-10-29 2017-02-15 安徽省光明粮油工业有限公司 Automatic filtering device
CN107617246A (en) * 2017-09-27 2018-01-23 莱州金生水环保科技有限公司 It is a kind of to be used to destroy the hardened mozzle of husky cylinder water purifier filtrate
CN110193219A (en) * 2019-04-28 2019-09-03 永联印刷耗材（深圳）有限公司 Print developer solution circulating filtration equipment

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