KR101446273B1 - Operation method of up-flow sand filtration using head loss and water treatment method using the same - Google Patents

Abstract

An operation method of an up-flow sand filtration apparatus of the present invention comprises a raw water supplying step of supplying raw water; a raw water transferring step of transferring raw water supplied through a raw water supplying pipe having one end connected with the lower side of the raw water inlet part; a raw water filtering step filtering the raw water by flowing up by filtering sand filled inside a filtering tank; a purified water discharging step of discharging purified water through a purified water discharging part including an auto valve formed on the upper part of the filtering tank; a filtering stopping step stopping inflow of the raw water and discharge of the purified water by closing the auto valve; a filtering sand collecting step of collecting the filtering sand to a filtering sand collecting tank; a filtering sand washing step washing the filtering sand by a filtering sand washing device; a filtering sand resupplying step of resupplying the filtering sand by a filtering sand resupplying device formed on the upper side of the filtering tank; and a filtering restarting step of restarting inflow of raw water and discharge of purified water by opening the auto valve, to have an advantage of maintaining a uniform filtering ability and water quality of purified water without additional input and replacement of filtering sand.

Description

Technical Field [0001] The present invention relates to a method for operating an upflow sand filtration apparatus using a water hammer and a water treatment method using the same,

The present invention relates to a method of operating an upflow sand filtration apparatus using a water column difference and a water treatment method using the same, and more particularly to a filtration tank having a raw water inflow part on one side and a purified water outflow part on the other side. Wherein the raw water inlet and the purified water outlet are provided with an automatic valve capable of controlling supply and interruption of raw water and discharge and interruption of purified water; A discharge portion formed below the filtration tank and having a J-shaped discharge pipe formed at a lower portion of the discharge chute; A raw water supply pipe formed at a predetermined distance above the discharge unit and connected at one end to the lower side of the raw water inflow part and formed horizontally in the filtration tank; A filtration yarn filled in the filtration tank and the discharge portion; A collection tank formed below the filtration tank to receive the discharge unit; A sand delivery device configured on the upper side of the filtration tank to allow the filtration device to be replenished; And a sand washing device having one side connected to the recovery tank and the other side connected to the sand distributing device. The filtration device closes the raw water supply pipe around the raw water supply pipe during the water treatment using the upflow type sand filtration device, The sand trapped by the recovery tank is recovered without an additional device such as a vibrator or an ultrasonic generator for separating the filter yarn to be clogged by applying a new operating method linked to the automatic valve constituted in the recovery tank, A sand filtration device that can improve the water quality of the purified water by maintaining the constant purification ability of the filtration yarn without supplementing or replacing the additional filter yarn from the outside by supplementing the filtration tank through a sand distribution device formed on the upper side of the post- And a water treatment method using the same.

In general, sand filtration apparatus is one of the purification processes in a water purification plant. It is a device for purifying water by passing through a sand layer and is mainly used for water treatment of sewerage and sewerage, and is divided into two types of rapid filtration and slow filtration depending on the filtration rate. Rapid filtration can be treated in a large amount, but the purification power is decreased. In the slow filtration, a biofilm is formed on the sand particles to remove small foreign substances and substances such as bacteria and heavy metals, but the filtration efficiency is low.

On the other hand, according to the filtration system, the downflow system and the upflow system can be classified according to the inflow and outflow positions of the raw water. The downflow method is a sand filtration method using natural subsoil, and it only needs to filtrate the surface of the filter material. As a result, the filtration duration is short and the filtration line speed is rapidly decreased. Therefore, backwashing is frequently required. Therefore, frequent backwashing must be performed due to clogging of the surface layer of the filter media, and backwashing of 5 to 15% of the water treatment flow rate is required for backwashing. Also, once a day for sewage and once every three days for constant water We should perform backward degree.

That is, the number of backwashes and the amount of backwash needed for backwash are large, and the backwash is also reprocessed again, resulting in a large loss of energy. In addition, there is a problem that the filtration layer is completely obstructed during long-term use and the whole sand must be replaced (in case of sewage, the whole or part of the sand must be changed once a year). And existing sand filtration method can cause channel when used for a long time, and it can cause mud ball (sand and solid matter tangled to form lumps of 20 ~ 25mm), air binding (Bubble formation in the sand layer) and break through (solid matter leaks as the filtration rate increases due to the reduction of the filtration area), and the quality of the filtration water may be deteriorated.

In addition, existing sand filtration requires a lower collecting device such as a pore block, a backwash device, and the like, so that a large amount of facility cost is required and continuous filtration is impossible.

In addition, the sand filtration is not only a mechanical filtration function in which particles larger than the pores of the filter medium are filtered, but also a physicochemical filtration function such as adhesion and adsorption, and a biological filtration action by microorganisms proliferating in the filter paper, There is a removal capability for. On the other hand, when a membrane such as a microfilter (MF) or a membrane is used, the soluble material is not filtered, thereby causing chlorine-based disinfection by-products due to disinfection.

In addition, the upward flow type is a method in which raw water flows in from the lower side and purified water flows out from the lower side through the sand layer.

Likewise, the upflow type sand filtration must be frequently backwashed, so that many backwashes are generated, and the water pollution problem similar to the downflow type occurs.

1 is a schematic view showing a conventional sand filtration apparatus of an upflow type. First, a filtration yarn 20 is filled in a filtration tank 10, and a raw water inlet 30 is provided at a lower side of the filtration tank 10 to perform water treatment into the filtration yarn 20 inside the filtration tank 10 So that the desired raw water is introduced. The raw water flowing into the raw milk inflow inlet 30 is purified by passing through the filtration yarn 20 and is supplied to the filtration tank 10 10 to the purified water outlet pipe 40). At the center of the filtration tank 10, there are provided a rising pipe 50, a compressed air discharging device 51 formed at the lower end of the rising pipe 50, a separating tank 50 formed at the upper end of the rising pipe 50, 60, a separation pipe 70 formed on the lower side of the separation tank, and a water discharge pipe 80 formed on the upper surface of the separation tank 60. A part of the filtration yarn 20 is moved upward by the compressed air discharging device 51 along the uprising pipe 50 and flows into the separating tank 60 so that the foreign substances are separated by the air bubble from the separating tank 60 And the filtration yarn 20 is circulated into the filtration tank 10 along the separation pipe 70 and flows into the filtration tank 10. Thus, although the apparatus has been developed to allow the filtration yarn 20 to be washed and circulated at the same time and functioning as a purified water, the apparatus is complicated and the foreign matter and the filtration yarn 20 are not separated well in the separation tank 60 There is a problem that the foreign matter may flow into the purified water discharge pipe 40 and the water quality may be deteriorated.

Korean Patent No. 1269582 on a sand filtration apparatus and method using a liquefied liquefaction phenomenon by the inventor of the present patent application has a filtration tank in which a raw water inflow portion is formed on one side and a purified water outflow portion is formed on the other side; A discharge portion formed below the filtration tank and having a J-shaped discharge pipe formed at a lower portion of the discharge chute; A raw water supply pipe formed at a predetermined distance above the discharge unit and connected at one end to the lower side of the raw water inflow part and formed horizontally in the filtration tank; A filtration yarn filled in the filtration tank and the discharge portion; And a vibrator coupled to one side of the filtration tank or the discharge unit; Wherein the raw water is supplied to the raw water supply pipe so that the raw water passes through the filter and is filtered; And operating the vibrator during the filtration step so that the filtered filtration material around the raw water supply pipe is removed through the discharge pipe; And a control unit.

However, since the sand filtering apparatus using the liquefaction phenomenon uses the liquefaction phenomenon of the sand by vibrating the vibrator to discharge the closed sand to the lower part, it is necessary to secure a space for attaching the vibrator to the lower part, And a considerable energy is required to generate sand liquefaction phenomenon.

(Patent Document 1) KR1269582 B1

(Patent Document 2) KR0247794 Y1

(Patent Document 3) KR2012-0028697 A

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide a method and apparatus for filtering raw water by sand filtration apparatus, (Water pressure) through adjustment of the opening and closing states of the automatic valve constituted in the raw water inlet and the purified water outlet, without any additional constitution requiring a lot of energy such as a vibrator. The present invention provides a method of operating an upflow type sand filtration apparatus and a water treatment method using the same, which can maintain a constant filtration capacity and a constant water quality without addition or replacement of filtration yarns by collecting the filtration sludge, .

In order to accomplish the above object, the present invention provides an upflow type sand filtration apparatus, comprising: a raw water inflow section (110) provided with an automatic valve on one side and a purified water discharge section A filtration tank (100) in which the filtration tank (120) is formed; A discharge unit 200 formed below the filtration tank 100 and having a J-shaped discharge pipe 220 formed under the discharge chute 210; A raw water supply pipe 300 spaced a predetermined distance above the discharge unit 200 and connected at one end to the lower side of the raw water inflow unit 110 so as to be horizontally formed inside the filtration tank 100; And a filtration yarn 400 to be filled in the filtration tank 100 and the discharge unit 200. The filtration tank 100 and the discharge unit 200 are provided with a plurality of There is no additional additional configuration.

In addition, the raw water supply pipe 300 is characterized in that a plurality of raw water supply holes 310 are formed on the lower side.

The filtration tank 100 may further include a recovery tank 600 formed below the filtration tank 100 to receive the discharge unit 200.

The apparatus further includes a filtration material supply device 700 configured to be installed on the upper side of the filtration tank 100 to replenish the filtration material 400.

The apparatus may further include a filter cleaning device 800 connected to one side of the recovery tank 600 and connected to the filtration device supply device 700 on the other side.

The filter cleaning apparatus 800 is a hydrocyclone.

The filter yarn 400 is formed by stacking two or more different filter media.

The filtration method of raw water using the upflow sand filtration apparatus of the present invention is characterized by comprising the following steps.

A raw water supply step of supplying raw water through a raw water inflow part 110 provided with an automatic valve 112 on one side;

A raw water moving step of moving the raw water supplied through the raw water supply pipe 300 connected to one end of the raw water inflow part 110 at one end and formed horizontally in the filtration tank 100;

A raw water filtration step of filtering the raw water moved through the raw water supply pipe (300) by an upward flow through a filter (400) filled in the inside of the filtration tank (100);

A purified water discharging step of discharging purified water filtered through the filter 400 through a purified water outlet 120 provided with an automatic valve 122 formed on the filtration tank 100;

A filtration stop step of temporarily closing the inflow of raw water and the discharge of purified water by closing the automatic valves 112 and 122 provided in the raw water inflow part 110 and the purified water outflow part 120;

A filtration waste recovery tank 600 for receiving a filtration waste discharge unit 200 including a J-shaped filtration discharge pipe 220 communicating with the filtration tank at a lower portion of the raw water supply pipe 300, The filtration apparatus 600 is driven by a filtration apparatus transfer pump 820 provided between the filtration apparatus cleaning apparatus 800 for cleaning the filtration apparatus connected to the filtration apparatus 600 and the filtration apparatus recovery tank 600 A number of filtration stages;

A washing step of washing the filter yarn recovered in the recovery tank 600 through the filter yarn cleaning device 800;

The filter yarn cleaned through the filter yarn cleaning device 800 is supplied to the upper portion of the filtration tank 100 through the filtration yarn supply device 700 provided on the upper side of the filtration tank 100 step;

And a filter medium opening step for opening the automatic valves 112 and 122 provided in the raw water inflow part 110 and the purified water outflow part 120 to restart the inflow of raw water and the discharge of purified water. .

The filtration method of the raw water using the upflow type sand filtration apparatus using the water head of the present invention is characterized in that the raw water is purified by the sand filtration apparatus and the filtration around the raw water supply pipe (Water pressure) through adjustment of the open and closed states of the automatic valves constituting the raw water inlet and the purified water outlet, without any additional configuration requiring a large amount of energy such as a vibrator, It is possible to maintain the constant filtration ability and the purified water quality without adding or replacing the additional filter by supplying the filtrate to the filtration tank.

1 is a schematic view showing a conventional sand filtration apparatus.
2 is a cross-sectional view of an upflow sand filtration apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of an upflow sand filtration apparatus according to an embodiment of the present invention.

Hereinafter, an upflow type sand filtration apparatus and method according to a preferred embodiment of the present invention will be described in detail with reference to FIG. 2 to FIG. 3 about an operation method of the upflow type sand filtration apparatus of the present invention and a water treatment method using the same.

It should be understood, however, that the embodiments described below are for the purpose of promoting understanding of the present invention, and that the scope of the present invention is not limited to the following embodiments, and that various modifications can be made by those skilled in the art to be.

2 is a cross-sectional view of an upflow sand filtration apparatus using a water hammer according to an embodiment of the present invention. As shown in FIG. 2, the upflow type sand filtration apparatus using the water head difference according to one embodiment includes a raw water inlet 110 having an automatic valve on one side and a purified water outlet 120 A filtration tank 100 in which the filtration tank 100 is formed; A discharge unit 200 formed below the filtration tank 100 and having a J-shaped discharge pipe 220 formed under the discharge chute 210; A raw water supply pipe 300 spaced a predetermined distance above the discharge unit 200 and connected at one end to the lower side of the raw water inflow unit 110 so as to be horizontally formed inside the filtration tank 100; And a filtration yarn 400 to be filled in the filtration tank 100 and the discharge unit 200. The filtration tank 100 or the discharge unit 200 may be connected to the filtration tank 100, It is characterized by the absence of any additional configuration that requires a lot of energy, such as a vibrator. Instead of controlling the inflow of the raw water and the outflow of the purified water through the opening and closing operation of the automatic valve formed in the raw water inflow part 100 and the purified water outflow part 120, it is possible to effectively remove the filtered, Cleaning and re-supply.

The filtration tank 100 has a raw water inlet 110 formed at one side thereof in a vertical direction and a purified water outlet 120 formed at the other side of the filtration tank 100 above the filtration tank 100, 100 are preferably made of a material excellent in corrosion resistance and abrasion resistance so as to be resistant to corrosion and to withstand wear caused by the filter cloth 400.

An inflow port 111 is formed in the upper part of the raw water inflow part 110 to constitute an automatic valve 112 capable of controlling inflow of raw water and a purified water to be filtered in the purified water outflow part 120 An automatic valve 122 capable of controlling the outflow port 121 and the outflow of the purified water is formed.

The inlet port 111 is formed to be higher than the outlet port 121 so that the raw water flowing into the inlet port 111 is maintained at a constant height in the raw water inlet section 110, Method can be applied.

Also, a pressurization filtration system that pressurizes the raw water by using a pump (not shown) interlocked with the automatic valve of the raw water inflow unit 110 may be applied instead of the gravity filtration system of the raw water.

The discharge unit 200 is formed on the lower side of the filtration tank 100. The discharge chute 210 is coupled to the filtration tank 100 and a discharge pipe 220 Is formed.

At this time, a raw water supply pipe 300 is formed to be spaced a predetermined distance above the discharge unit 200. One end of the raw water supply pipe 300 is connected to the lower side of the raw water inflow unit 110, (Not shown).

A filter 400 is charged into the filtration tank 100 and the discharge unit 200. The filter 400 is charged to a lower height than the purified water outlet 120 of the filtration tank 100, And is filled up to the end of the discharge pipe 220 of the discharge part 200.

A plurality of raw water supply holes 310 are formed on the lower side of the raw water supply pipe 300 so that raw water flowing into the raw water inflow portion 110 is supplied to the filter 400 through the raw water supply hole 310 It is possible to prevent the raw water supply hole 310 from being blocked by the filter yarn 400 and the foreign matter to be filtered. At this time, the raw water supply hole 310 may be formed as a long groove on the lower side of the raw water supply pipe 300. A recovery tank 600 may be formed on the lower side of the filtration tank 100 to accommodate the discharge unit 200.

In the basic raw water filtration method using the upflow sand filter thus configured, raw water is moved to the raw water supply pipe 300 through the raw water inflow portion 110 by opening the automatic valve 112 of the raw water inlet 111 The raw water is supplied through the raw water supply hole 310 of the raw water supply pipe 300 and flows upward through the filter 400 to be filtered and discharged through the outlet 121 of the purified water discharge portion 120, The automatic valve 122 configured in the purified water outlet is operated in the open state.

That is, when the raw water flows into the inlet 111, the filtered water 400 passes through the raw water inlet 110 and the raw water supply pipe 300, and is filtered and discharged to the purified water outlet 120, .

At this time, the portion where the raw water is filtered is the filter paper 400 around the raw water supply pipe 300. Since the filtering paper 400 is filtered by the foreign material contained in the raw water through the filtration process and the filtering ability is lowered, When the filter 400 around the filter 300 is blocked, the filter 400 may be removed through the discharge unit 200 because the filter 400 can be maintained only when the filter 400 is removed or backwashed.

In order to remove such an obstructed filtration yarn, the filtration tank 100 or the discharge unit 200 is provided with a separate additional structure requiring a large amount of energy such as a vibrator and a liquefaction phenomenon of the filtration yarn using the vibrator. And discharging the filtered fibrillated yarn to the end of the discharge pipe 220 of the discharge unit 200 is used.

However, in the present invention, it is not necessary to provide a separate additional structure requiring a large amount of energy, such as the vibrator, but instead, the opening / closing operation of the automatic valve formed in the raw water inlet 100 and the purified water outlet 120, It is possible to remove, collect, wash, and re-supply the effectively plugged filter using water head (water pressure) without additional energy input by controlling inflow and outflow of water. I want to explain.

First, a recovery tank 600, a filter yarn feeder 700, and a filter yarn cleaning device 800, which is configured between the recovery tank and the filter yarn feeder, are provided for removing, recovering, washing and re- And a filtrate discharge pipe 810, a filtrate discharge pipe 820, a wash water supply pipe 830 and a discharge pipe 840 are formed in the filter sheet cleaning apparatus 800.

The recovery tank 600 may be formed to receive the discharge unit 200 below the filtration tank 100 and the recovery tank 600 may be disposed below the filtration tank 100 to discharge The filter 200 may be received inside and closed so that the filter 400 discharged from the discharge unit 200 can be recovered without discharging the raw water.

A filtration yarn supply device 700 is provided on the upper side of the filtration tank 100 to replenish the filtration yarn 400. The filtration yarn 400 is discharged to the discharge unit 200, Can be supplemented.

2 and 3, the lower part of the filtration yarn supply device 700 may be formed to have a narrow width so that when the filtration yarn 400 is replenished to the filtration tank 100, If the filtration yarn 100 is replenished up to the lower end of the apparatus 700, it can be prevented from being supplemented.

In addition, the conveying means 710 may be coupled to both sides of the filtration yarn supplying device 700 so that the filtration yarn 400 may be supplied uniformly while moving in the lengthwise or widthwise direction of the filtration tank 100.

More specifically, the filter cleaning device 800 may be configured such that one side thereof is connected to the recovery tank 600 and the other side thereof is connected to the filtration device supply device 700 have.

That is, a filtration apparatus transfer pump 820 is installed between the recovery tank 600, the filtration apparatus cleaning apparatus 800, and the filtration apparatus feed apparatus 700 and connected to the filtration apparatus transfer piping 810, The filter paper 400 recovered in the recovery tank 600 is separated from the filter paper cleaning apparatus 800 and supplied to the filter paper feeder 700 so that the filter paper 400 can be reused have.

At this time, the filter cloth washing apparatus 800 may be a hydrocyclone. When the washing water is supplied from the washing water supply pipe 830, the heavy sand is pushed outward by the centrifugal force due to the rotation of the fluid, And the foreign matter is separated and discharged to the water discharge pipe 840 formed at the upper part, so that the filter 400 can be washed.

In addition, the filter yarn 400 may be formed so that two or more different filter media are stacked. That is, the filter yarn 400 may be formed by sandwiching filter media such as anthracite, activated carbon, zeolite, or pearlite together with sand.

For example, when sand and anthracite are stacked and used, the filtration yarn feeder 700 is formed into two chambers so that sand can be supplied to one side and anthracite can be supplied to the other side, and an opening / closing device The opening / closing device is controlled so that the thickness of the filter material layer is formed to be one layer of sand and one layer of the anthracite so as to be laminated in several layers.

In addition, the filter material discharged through the discharge unit 200 is transferred to the hydrocyclone, and the material is separated by the rotation of the washing water. At the same time, the two filter materials are separated by the specific gravity difference, And supplied to the re-feed device 700 again.

That is, since the andracite is lighter than sand, the sand is submerged in the hydrocyclone, and the andracite is formed in the upper part of the hydrocyclone, so that the sand and the andracite can be separated from each other.

When the filter material is constituted as a double layer, the water quality of the purified water can be further improved by using the filter material with a small particle diameter and the filter material having a good adsorption function.

In addition, the filter conveying pumps 820 may be a sand pump (underwater) used for collecting sand from a river, draining concrete sludge from a civil engineering work, dredging work, remicon plant, or other industrial plant, A pump of a diaphragm type or the like can be used, but it is preferable to use a pump which is excellent in wear resistance and does not cause leakage and does not cause clogging.

As described above, the filtration tank 100 is additionally provided with a recovery tank 600 for removing, recovering, cleaning and re-supplying the filtration material, a filtration material supply device 700, and filtration constructed between the recovery tank and the filtration material supply device And a water discharge pipe 840 and a water discharge pipe 840 are formed in the filter sheet cleaning device 800. The filter sheet conveying device 800 includes a filter sheet conveying pipe 810, a filtration sheet conveying pump 820, The flow of the raw water and the flow of purified water through the opening and closing operation of the automatic valve formed in the raw water inflow part 100 and the purified water outflow part 120 are controlled through the constitution to effectively remove the filtered air, The operation of the specific upflow sand filtration apparatus of the present invention, which enables washing and re-supply, is as follows.

A raw water supply step of supplying raw water through a raw water inflow part 110 provided with an automatic valve 112 on one side;

A raw water moving step of moving the raw water supplied through the raw water supply pipe 300 connected to one end of the raw water inflow part 110 at one end and formed horizontally in the filtration tank 100;

A raw water filtration step of filtering the raw water moved through the raw water supply pipe (300) by an upward flow through a filter (400) filled in the inside of the filtration tank (100);

A purified water discharging step of discharging purified water filtered through the filter 400 through a purified water outlet 120 provided with an automatic valve 122 formed on the filtration tank 100;

A filtration stop step of temporarily closing the inflow of raw water and the discharge of purified water by closing the automatic valves 112 and 122 provided in the raw water inflow part 110 and the purified water outflow part 120;

A filtration waste recovery tank 600 for receiving a filtration waste discharge unit 200 including a J-shaped filtration discharge pipe 220 communicating with the filtration tank at a lower portion of the raw water supply pipe 300, The filtration apparatus 600 is driven by a filtration apparatus transfer pump 820 provided between the filtration apparatus cleaning apparatus 800 for cleaning the filtration apparatus connected to the filtration apparatus 600 and the filtration apparatus recovery tank 600 A number of filtration stages;

A washing step of washing the filter yarn recovered in the recovery tank 600 through the filter yarn cleaning device 800;

The filter yarn cleaned through the filter yarn cleaning device 800 is supplied to the upper portion of the filtration tank 100 through the filtration yarn supply device 700 provided on the upper side of the filtration tank 100 step;

And opening the automatic valve (112, 122) provided in the raw water inlet (110) and the purified water outlet (120) to restart the inflow of raw water and the discharge of purified water, By using the operating method of the filtration device, the closed filter can be collected, washed, and re-supplied to the filtration tank, so that it is possible to maintain the constant filtration ability and the purified water quality without adding or replacing the additional filter.

More specifically, the method of collecting, washing and re-supplying the occluded filtration yarn will be described as follows. When the automatic valves 112 and 122 provided in the raw water inlet 110 and the purified water outlet 120 are closed, The entire upflow type sand filtration apparatus 1000 including the filtration tank 100 is shut off from the outside through the filtration stopping step. When the filtration apparatus 820 is driven after the upflow type sand filtration apparatus 1000 is shut off from the outside, the filtration apparatus filled in the discharge pipe 220 of the discharge unit 200 is subjected to the water head pressure The clogged filter paper around the raw water supply pipe 300 sequentially moves to the discharge pipe 220 of the discharge unit 200 and the gradually clogged filter paper is recovered to the recovery tank 600 . The clogged filter paper recovered in the recovery tank 600 is cleaned in the filter cleaning apparatus 800 through the filtration paper conveyance pipe 820 through the filtration paper conveyance pipe 810 and is provided on the upper side of the filtration tank 100 And then supplied again to the upper portion of the filtration tank 100 through the filtration apparatus feeder 700.

The automatic valves 112 and 122 provided in the raw water inflow part 110 and the purified water outflow part 120 are opened and the inflow and outflow of the raw water after the predetermined time or a predetermined amount of filtration is recovered, The purification of the raw water using the upflow sand filtration device is resumed through the opening of the filter medium to restart the discharge of the purified water.

The filtration stopping step and the operating time of the filter medium opening step can be appropriately adjusted according to the degree of contamination of the raw water or the degree of occlusion of the filtering yarn, and the filtration using gravity or the pressurizing operation using a pressure pump interlocked with the automatic valve, And the operating time may be operated under the same conditions as the operating time, backwash or washing time of the conventional sand filtration apparatus.

The raw water supply pipe may be provided with a plurality of raw water supply holes on the lower side thereof, and the filtration device washing device may be a hydrocyclone, and the filtration product may be formed by stacking two or more different filter media, The inlet may be provided on the side or center of the filtration tank.

1000: Upflow sand filtration device
100: filtration tank 110: raw water inlet
111: inlet 112: automatic valve
120: purified water outlet 121: outlet
122: Automatic valve 200:
210: Discharge chute 220: Discharge tube
300: raw water supply pipe 310: raw water supply hole
400: filter paper 600: recovery tank
700: Filtration apparatus feeder 800: Filtration apparatus cleaning apparatus
810: Filtration bath delivery pipe 820: Filtration bath delivery pump
830: Water supply pipe 840: Water discharge pipe

Claims (5)

A raw water supply step of supplying raw water through a raw water inflow part provided on a side or a center of the filtration tank and equipped with an automatic valve on one side;
A raw water moving step of moving raw water supplied through a raw water supply pipe, one end of which is connected to a lower side of the raw water inflow part and formed horizontally in the inside of the filtration tank and has a plurality of raw water supply holes at the lower side;
A raw water filtration step of filtering the raw water transferred through the raw water supply pipe into an inside of the filtration tank through an air filter having an anthracite, an activated carbon, a zeolite, and a pearlite and a sand filter;
A purified water discharging step of discharging purified water filtered through the filter through a purified water outlet provided in an upper portion of the filtration tank;
A filtration stop step for temporarily stopping the inflow of raw water and the discharge of purified water by bringing the automatic valve provided in the raw water inflow part and the purified water outflow part into a closed state;
A filtration yarn recovery tank for containing a filtration yarn discharge unit composed of a J-shaped filtration yarn discharge pipe communicating with the filtration tank at a lower portion of the raw water supply pipe, and a hydrocyclone for cleaning the filtration yarn connected to one side of the recovery tank the filtration system comprising: a filtration system comprising: a filtration system comprising: a filtration system comprising:
A washing step of washing the filter yarn recovered in the recovery tank through the filter yarn cleaning device;
A filtration material supply step of supplying the filtration material washed through the filtration device cleaning device to the upper portion of the filtration tank through a filtration material supply device provided on the upper side of the filtration tank;
And a filter medium opening step of opening the automatic valve provided in the raw water inlet and the purified water outlet to restart the inflow of raw water and the discharge of purified water,
The filtration efficiency of which is lowered by the foreign matter contained in the raw water around the raw water supply pipe due to the driving of the filtration < Desc / Clms Page number 5 > feed pump only when the automatic valve provided in the raw water inflow part and the purified water outflow part is closed, Withdrawing, washing, and re-supplying the filtered filtrate through the discharge port to the filtrate recovery tank so that the filtered filtrate can be effectively removed, recovered, and re-supplied without using additional energy. delete delete delete delete

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