KR100689855B1 - Automatic backwash filter - Google Patents

Abstract

The present invention relates to an automatic backwash filter, and to filter the contaminants of the secondary treated water in the water treatment and wastewater treatment plants, the filter paper is formed inside the filter paper by setting the filter paper at regular intervals in the longitudinal direction of the longitudinal filter paper. At the same time as the filtration process in the bed, backwash water was sequentially flowed up to each filter paper with a backwash pump to separate and fluidize the contaminants occluded in the filter paper from the filter paper, and then the moving bridge moved over the rail on the top of the filter paper. Suspended contaminants mixed with the backwash water are collected by the backwash pump, separated and discharged, and the contaminant-removed filter medium sinks back to the filtration layer and can be repeatedly used as the filter medium. The cleaning process can be performed in parallel and simultaneously to maximize the water treatment efficiency and Will largely so as to reduce the installation area and cost, and the like of the non-operating costs.

Automatic backwash filter

Description

Automatic Backwash Filter {AUTOMATIC BACKWASH FILTER}

1 is an external perspective view of the present invention installed in the filter paper,

2 is a plan view of an automatic backwash filter paper to which the present invention is applied;

3 is a cross-sectional view taken along the line A-A 'of FIG.

4 is a cross-sectional view taken along the line B-B 'of FIG.

5 is a cross-sectional view taken along the line C-C 'of FIG.

6 is a general configuration of the present invention,

7 is a partial side view of FIG. 6;

8 is a partial excerpt perspective view of a screen applied to the present invention;

9 is a block diagram of a backwash valve and a chamber mounted on the present invention;

10 is a front, rear view and a plan view of the contact plate mounted on the backwash valve and the chamber;

11 is a backwash water injection process diagram of the present invention,

12 is a block diagram of a backwash water discharge device of the present invention,

13 is a partial plan view of the same;

14 is a block diagram of a contaminant separating apparatus of the present invention.

The present invention relates to an automatic backwash filter, and to filter the contaminants of the secondary treated water in the water treatment and wastewater treatment plants, the filter paper is formed inside the filter paper by setting the filter paper at regular intervals in the longitudinal direction of the longitudinal filter paper. At the same time as the filtration process in the bed, backwash water was sequentially flowed up to each filter paper with a backwash pump to separate and fluidize the contaminants occluded in the filter paper from the filter paper, and then the moving bridge moved over the rail on the top of the filter paper. Suspended contaminants mixed with the backwash water are collected by the backwash pump, separated and discharged, and the contaminant-removed filter medium sinks back to the filtration layer and can be repeatedly used as the filter medium. The cleaning process can be performed in parallel and simultaneously to maximize the water treatment efficiency and Will largely so as to reduce the installation area and cost, and the like of the non-operating costs.

In general, in filtration of contaminants of secondary treatment water in water, wastewater and wastewater treatment plants, since the filtration process and the cleaning process of the filter medium have been dualized and intermittently made up to now, a lot of required sites for water treatment facilities are required. There was a need for excessive installation and operation costs.

The present invention has been studied in order to eliminate all the problems of the conventional water purification and the filtration device of the secondary treatment water in the wastewater treatment plant,

In the automatic backwash filter of the present invention, in filtering the contaminants of the secondary treated water in the constant and sewage and wastewater treatment plants, the filter paper is partitioned at regular intervals in the longitudinal direction of the longitudinal filter paper and filtered in the filter layer formed inside the filter paper. Simultaneously with the process, the backwash water was sequentially flowed up to each filter paper with a backwash pump to separate and fluidize the contaminants occluded in the filter media from the filter media, and then the moving bridge moved on the rail above the filter paper. The mixed and suspended pollutants are collected by suction with a backwash pump, separated and discharged, and the contaminant-removed filter medium sinks back to the filtration layer and can be repeatedly used as a filter medium. Maximize water treatment efficiency by allowing them to be carried out in parallel and in parallel at the same time That a significantly so as to reduce the running cost such as the cost and characterized.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is an external perspective view of the present invention installed in the filter paper,

2 is a plan view of an automatic backwash filter paper to which the present invention is applied, FIGS. 3, 4, and 5 are cross-sectional views taken along line A-A ', line B-B', and line C-C 'of FIG.

6 is an overall configuration of the present invention, Figure 7 is a partial side view of Figure 6, Figure 8 is a partial excerpt perspective view of the screen applied to the present invention,

The automatic backwash filtration system in which the present invention is installed is continuously installed at a predetermined interval with a filter paper (1) through which contaminants of secondary treated water are filtered, and on one side thereof, the secondary treated water inflow pipe (2) and the opposite side Filtrate discharge pipe 3 is formed on the other side, respectively.

A secondary treated water inlet 4 and a backwash water inlet and a filtered water outlet 5 are formed between the secondary treated water inlet conduit 2 and the filtered water discharge conduit 3 and the filter paper 1, and the filter paper ( At the bottom of 1), the filtration layer 7 and the screen 9 containing the filter medium 6 and the filtration tank 8 are formed in the lower side,

The filter layer 7 is divided into one U-shaped compartment for each of the backwash water inlet and the filtered water outlet 5, and the filter medium 6 is composed of a combination of sand and anthracite, and added granular activated carbon. The efficiency can be improved.

In addition, the screen 9 has a plurality of inverted triangular bars 28 arranged in a state in which a slit 25 is formed therebetween, and the inverted triangular bars 28 are welded in a state in which a connecting bar 30 is horizontally disposed on a bottom thereof. I support it.

On the other hand, the upper portion of the filter paper (1) is provided with a rail (10, 10 '), the moving bridge 12 is connected to the drive motor 11 is connected to the upper portion, the lower end of the backwash water collection pipe ( 13 is fitted with a hood 14 and a cleaning pump 16, the backwash water discharge pipe 18 is connected to the cleaning pump 16 through the cylindrical body 40, the treated water is discharge pipe 43 And discharge to the treated water discharge passage 20 through the discharge port 48, and the separated pollutants are discharged to the container 50 through the pollutant discharge pipe 47.

In the filtered water discharge conduit 3, a backwash valve and a chamber 21 are mounted at an end thereof, and a backwash pipe 22 communicating with the filtered water outlet 5 is connected to a backwash pump 24 so that the movable bridge 12 It is attached to the bottom of).

9 is a configuration diagram of a backwash valve and a chamber mounted on the present invention, FIG. 10 is a front, back and top views of a contact plate mounted on the backwash valve and the chamber, and FIG. 11 is a backwash injection process diagram of the present invention.

The backwashing water inlet and the filtered water outlet 5 formed at a predetermined interval in the lower part of the filter paper 1 wall are formed with the substrate 27 installed around the back of the contact plate 31 on which the backwashing water inlet 29 is formed. The upper and lower jaws 32 and 32 'are coupled to the protruding jaws 33 and 33' of the substrate 27 and are secured by the spring 36 mounted on the support 35.

Fig. 12 is a block diagram of the backwash water discharge device of the present invention, and Fig. 13 is a partial plan view of the backwash water collecting pipe 13 mounted at a lower side of the washing pump 16, and a plurality of collecting nozzles 39 are disposed at the end thereof. Is attached, and a hood 14 is attached to the outside thereof.

14 is a block diagram of the contaminant separating apparatus of the present invention, in which a lower portion of the contaminant hopper 41 is provided with a treatment water collecting pipe 42 embedded in the upper portion of the cylindrical body 40. When the backwash water inlet 45 is formed at one side thereof, the pollutant discharge pipe 47 having the valve 46 mounted at the lower end thereof is connected thereto.

Reference numeral 26 is a hand rail.

The automatic backwash filter of the present invention configured as described above is included in the secondary treated water when the secondary treated water containing the contaminant is introduced into the filter paper 1 through the inlet conduit 2 and the secondary treated water inlet 4. Contaminants collected are filtered by the filter medium (6) of the filter layer (7),

The filter medium 6 is made of a combination of sand and anthracite, and granular activated carbon is added to adsorb organic compounds and other contaminants, and thus is useful for improving the taste, color, and smell of the filtered water.

The contaminant-removed filtrate is discharged to the filtrate discharge conduit 3 through the screen 9, the filter tank 8, and the backwash water inlet and the filtrate outlet 5 to be sent to the next stage treatment apparatus.

At this time, a part of the filtrate discharged to the filtrate discharge conduit 3 remains as backwash water in the filtrate discharge conduit 3 to maintain a constant level, and when the cleaning cycle of the filter layer 7 arrives,

As shown in FIG. 11, when one of the backwash water inlet and the filtered water outlet 5 and the backwash water inlet 29 coincide with each other, the backwash pump 24 is operated so that the backwash water is introduced and the backwashing process proceeds. The backwash water injection and filtered water outlets 5 are in a stopped state, and all the remaining backwash water injection and filtered water outlets 5 are in a filtered state.

In this order, the backwash pump 24 is operated so that the backwash water flows back into the filtration tank 8 through the backwash pipe 22, the backwash valve and the chamber 21, and the backwash water inlet and the filtered water outlet 5, This flows upward through the slits 25 between the inverted triangular bars 28 of the screen 9, which are gradually narrowed to the upper part again, so that the flow is accelerated to act more strongly on the contaminants occluded in the filter medium 6, The pollutants can be separated more efficiently.

As shown in FIG. 12 in the state in which the contaminant separated from the filter medium 6 is mixed with the backwashing water and fluidized, the volume of the contaminant is increased by the water pressure and the flow rate of the backwashing water on which the filter medium 6 above the filter layer 7 floats. The swelling and floating causes sand to be distributed at the center and separated contaminants at the outside, and the separated contaminants are suppressed from being spread around by the hood 14. At this time, the washing pump 16 is operated so that the backwash water around the contaminant is sucked through the backwash water collecting nozzle 39 mounted on the outer side of the hood 14, and the backwash water collecting pipe 13 and the backwash water discharge pipe ( 18) is sent to the backwash water inlet 45 of the cylindrical body 40.

In this process, each filtration layer 7 is subjected to a sequential cleaning process while proceeding from A to E direction, for example, when the backwash water is injected through the backwash water injection and the filtered water outlet 5 at the C point, Filtrate is discharged through the backwash water injection and filtered water outlet 5 at points A and E, point D is at the stop of filtration, point B is at the backwash stop, and only point C is at the backwash progress.

The backwash water introduced into the cylindrical body 40 again rotates rapidly along the inner surface of the cylindrical body 40, causing the swirl to descend, and contaminants are collected in the conical hopper 41 and then through the valve 46. It is discharged to the pollutant discharge pipe 47 is collected in the container 50.

On the other hand, the treated water from which the pollutant is separated from the backwash water rises upward and is discharged to the treated water discharge pipe 43 through the treated water collecting container 42 mounted at the upper center to discharge the backwashed water through the outlet 48. It is discharged to the passage 20.

Through this process, the backwashing process of the filter medium 6 is completed, and again, as described above, the secondary treated water containing the contaminant is filtered through the inlet conduit 2 and the secondary treated water inlet 4. ), The filtration process is repeated by the filter medium (6) introduced into the backwashing process and filtered cleanly.

In this process, the filtration process of the secondary treated water in each filter paper 1 and the rinsing process of the filter medium 6 by backwashing water are continuously repeated, so that the secondary treated water is always cleaned with the clean filter medium 6. Can be filtered continuously.

Therefore, according to the automatic backwash filter of the present invention, the filtration process of the secondary treatment water and the filtration process of the filter medium are conventionally separated from the treatment method that was inefficient and separated from the contaminated filter medium (6). The backwashing process of the filter medium 6, which is used to obtain a clean filter medium 6 and is repeatedly used, can be carried out sequentially in succession with the continuous filtration process of the secondary treated water, so that fewer water treatment facilities can be installed and operated. There is an effect that the secondary treatment water of a larger capacity can be efficiently filtered at a cost.

Claims (8)

(Correction) In a known automatic backwash filter, in which filter papers equipped with secondary treated water inlet pipes and filtered water outlet pipes are partitioned at regular intervals, and a moving bridge having a washing pump mounted on the bottom thereof at the upper part thereof, A plurality of backwash water injection and filtered water outlets 5 are formed between the filtered water discharge conduit 3 and the filter paper 1, and a plurality of reverse triangle bars 28 formed between the slits 25 between the filter paper 1 and 28. ), And a screen 9 mounted with a connecting bar 30 horizontally mounted on the bottom thereof, The backwash water discharge pipe 18 is connected to the upper portion of the cleaning pump 16 so that the cylindrical body 40 is mounted at an end thereof, and the discharge pipe 43 is connected to the upper portion thereof, and then through the discharge port 48, the treated water discharge passage ( 20), the pollutant discharge pipe 47 is connected to the container 50 at the lower end, The backwash valve and the chamber 21, the backwash pipe 22 and the backwash pump 24 are connected to the backwash water inlet and the filtered water outlet 5 of the filtered water discharge conduit 3, Mounted on the bottom, The backwash valve and the chamber 21 have a close contact plate formed with a substrate 27 around the backwash water inlet and the filtered water outlet 5 formed at a predetermined interval in the lower part of the wall of the filter paper 1 to form the backwash water inlet 29. The upper and lower jaws 32 and 32 'of the 31 are coupled to the protruding jaws 33 and 33' of the substrate 27 and attached to the spring 36 mounted on the support 35. Automatic backwash filter made with. (delete) (Correction) The washing pump 16 is equipped with a backwash water collecting pipe 13 at a lower side thereof, and a plurality of collecting nozzles 39 are attached to the end thereof, and a well-known hood (outside) is provided. 14) is equipped with an automatic backwash filter. (Correction) According to claim 1, wherein the cylindrical body 40 has a conical hopper 41 at the lower half thereof, and a treatment water collecting container 42 is built in the upper portion thereof, and a backwash water inlet 45 is provided at one side thereof. Automatic backwash filter, characterized in that formed. (delete) (delete) (delete) (delete)

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