KR102496736B1 - Diatomite filter - Google Patents

Abstract

In the present invention, since the filtration unit is made of stainless material, when filtering acidic wastewater or basic wastewater, it is not corroded and is not torn by sharp substances mixed in the wastewater, so that the filtration unit can be used repeatedly for a long time. it's about
In the diatomaceous earth filter according to the present invention, a plurality of filtration units 20 are arranged inside the filtration tank 10, and the first inlet and outlet pipes L1 and the second inlet and outlet pipes L2 are disposed at the upper and lower ends of the filtration tank 20. ) is connected, and the upper and lower ends of the filtration unit 20 are connected to the first and second filtered water discharge pipes L3 and L4, and the filtration unit 20 has a cylindrical inner stainless steel perforated net 21 and the inner It consists of an outer stainless mesh network 22 surrounding the stainless perforated network 21, and the inner stainless perforated network 21 and the outer stainless mesh network 22 are coupled by a plurality of bolts 23 and nuts, and the inner stainless perforated network ( 21), an upper blocking plate 24 and a lower blocking plate 25 are mounted on the upper and lower ends, respectively, the first connection pipe 26 is connected to the upper blocking plate 24, and the lower blocking plate 25 It is characterized in that the second connection pipe 27 is connected.

Description

Diatomite filter {DIATOMITE FILTER}

The present invention relates to a diatomaceous earth filter, and more particularly, the filtration unit is composed of an inner perforated mesh made of stainless material and an outer mesh mesh made of stainless steel coated with diatomaceous earth, so that it does not corrode when filtering acidic wastewater or basic wastewater. In addition, it relates to a diatomaceous earth filter that is not torn by sharp substances mixed in wastewater and can be used repeatedly for a long time.

Korean Patent No. 10-0938400 (registered on January 15, 2010) introduces a "water treatment filtration device".

The water treatment filtration device comprises an upper and lower filtration unit in which at least one or more porous filtration nets having pipe-shaped perforated filtration nets embedded in the inlet and outlet of the filtration tank are installed on the base plate, and antibacterial and antibacterial functions are provided in the inner space of the filtration tank. Diatomaceous earth, morazite, zenotite, illite-mica, Natural stone powder made of any one of zeolite, bentonite, and tourmaline is supplied, and the porous filter net of the upper and lower filter units is alternately used during filtration or when washing the filter net and natural stone powder with water.

However, the water treatment filtration device has disadvantages in that the filter net is damaged by sharp foreign substances, diatomaceous earth is used once and discharged to the outside during backwashing, and diatomaceous earth itself causes environmental pollution.

Therefore, an object of the present invention is that the filtration unit is composed of an inner perforated network made of stainless material and an outer mesh network made of stainless material coated with diatomaceous earth, so that when acidic wastewater or basic wastewater is filtered, not only does it not corrode, but also sharp particles mixed in the wastewater are filtered. It is to provide a diatomaceous earth filter that is not torn by the material and can repeatedly use the filtration unit for a long time.

Another object of the present invention is to provide first inlet and outlet pipes and second inlet and outlet pipes to the top and bottom of the diatomaceous earth filtration tank, respectively, to supply diatomaceous earth to the filtration tank through the first inlet and outlet pipes and to the filtration tank through the second inlet and outlet pipes. It is to provide a diatomaceous earth filter capable of evenly coating the diatomaceous earth on the outer stainless mesh net of the filtration unit by alternately supplying the diatomaceous earth.

Another object of the present invention is that the first inlet and outlet pipes are installed at the top and bottom of the filtration tank, respectively, so that wastewater is simultaneously supplied to the filtration tank through the first inlet and outlet pipes and the second inlet and outlet pipes in the filtration process, An object of the present invention is to provide a diatomaceous earth filter in which the filtration operation is performed evenly throughout the filtration unit disposed inside the filtration tank.

Another object of the present invention is to use diatomaceous earth once by supplying diatomaceous earth and contaminants deaerated in backwashing to a diatomaceous earth separator, separating contaminants and diatomaceous earth in the diatomaceous earth separator, and supplying the separated diatomaceous earth to a diatomaceous earth storage tank. The goal is to provide a diatomaceous earth filter that can be recycled rather than thrown away.

In the diatomaceous earth filter according to the present invention for achieving the above object, a plurality of filtration units are arranged inside a filtration tank, a first inlet and outlet pipes are connected to the top and bottom of the filtration tank, and the filtration unit The upper and lower ends are connected to the first and second filtered water discharge pipes.

The filtration unit is composed of a cylindrical inner stainless perforated network and an outer stainless mesh network surrounding the inner stainless perforated network, the inner stainless perforated network and the outer stainless mesh network are coupled by a plurality of bolts and nuts, and the top and An upper blocking plate and a lower blocking plate are respectively mounted at the bottom, a first connection pipe is connected to the upper blocking plate, a second connection pipe is connected to the lower blocking plate, and the first connection pipe is connected to a first filtered water discharge pipe; The second connection pipe is connected to the second filtered water discharge pipe, and diatomaceous earth supplied to the inside of the filter tank through the first inlet pipe or the second inlet pipe is attached to the outer stainless mesh net.

In addition, in the diatomaceous earth filter according to the present invention, the first inlet and outlet pipes and the second inlet and outlet pipes are connected to the selection supply pipe, the first valve and the second valve are mounted on the selection supply pipe, and the pumping supply pipe is provided between the first valve and the first valve. One end of is connected to the selection supply pipe, a third valve and a pump are mounted on the pumping supply pipe, the other end of the pumping supply pipe is connected to the first tank, one end of the diatomaceous earth supply pipe is connected to the pumping supply pipe, and the other end of the diatomaceous earth supply pipe is connected to the first tank. 2 connected to the tank, a fourth valve is mounted on the diatomaceous earth supply pipe, the second tank and the diatomaceous earth separator are connected by a diatomaceous earth recovery pipe, and one end of the first discharge pipe is connected to the connection point of the first inlet and outlet pipe and the selective supply pipe. , The fifth valve is mounted on the first discharge pipe, one end of the second discharge pipe is connected to the connection point of the second inlet and outlet pipe and the selective supply pipe, the sixth valve is mounted on the second discharge pipe, and the first discharge pipe and the second discharge pipe are connected. Each is connected to the third discharge pipe, a seventh valve is mounted on the third discharge pipe, the third discharge pipe is connected to the diatomaceous earth separator, and one end of the diatomaceous earth discharge pipe is connected to the third discharge pipe, so that the diatomaceous earth discharge pipe is connected to the first discharge pipe. It is disposed between the two discharge pipes, the other end of the diatomaceous earth discharge pipe is connected to the second tank, the 11th and 12th valves are mounted on the first and second filtered water discharge pipes, respectively, and the first and second filtered water discharge pipes collect the first filtered water. pipe, one end of the second filtered water recovery pipe is connected to the first filtered water recovery pipe, a 13th valve is mounted on the second filtered water recovery pipe, and the other end of the second filtered water recovery pipe is connected to the first tank, One end of the bypass pipe for backwashing is connected to the pumping supply pipe, a 14th valve is mounted on the bypass pipe, and the other end of the bypass pipe is connected to the first filtered water recovery pipe.

As a result, when filtering acidic wastewater or basic wastewater, the diatomaceous earth filter according to the present invention does not corrode and is not torn by sharp substances mixed in the wastewater, so that the filtration unit can be used repeatedly for a long time and filter diatomaceous earth. It can be evenly coated on the outer stainless mesh net of the unit, and the filtration operation is performed evenly throughout the filtration unit. There is an effect that can be recycled.

1 is a schematic cross-sectional view of a diatomaceous earth filter according to the present invention.
Figure 2 is an enlarged detailed view of the filtration unit of Figure 1;
3 to 6 are diagrams schematically showing the overall configuration of a diatomaceous earth filter according to the present invention, FIGS. 3 and 4 are for explaining a diatomaceous earth coating process, and FIG. 5 is for explaining a filtration process, FIG. 6 is for explaining the backwashing process.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, in the diatomaceous earth filter according to the present invention, a plurality of filtration units 20 are arranged inside a filtration tank 10, and first inlet and outlet pipes L1 are provided at the top and bottom of the filtration tank 20. The second input/output pipe L2 is connected, and the upper and lower ends of the filtration unit 20 are connected to the first and second filtered water discharge pipes L3 and L4.

Referring to FIG. 2, the filtration unit 20 is composed of a cylindrical inner stainless steel perforated net 21 and an outer stainless mesh net 22 surrounding the inner stainless steel perforated net 21, and the inner stainless steel perforated net 21 and The outer stainless mesh network 22 is coupled by a plurality of bolts 23 and nuts, and the upper blocking plate 24 and the lower blocking plate 25 are mounted on the upper and lower ends of the inner stainless perforated network 21, respectively, The first connection pipe 26 is connected to the upper blocking plate 24, the second connection pipe 27 is connected to the lower blocking plate 25, and the first connection pipe 26 is connected to the first filtered water discharge pipe L3. ), and the second connection pipe 26 is connected to the second filtered water discharge pipe L4, and is supplied to the inside of the filtering tank 10 through the first inlet pipe L1 or the second inlet pipe L2. Diatomaceous earth (not shown) is attached to the outer stainless mesh network 22.

The hole of the inner stainless perforated network 21 has a diameter of 2 to 3 mm, and the outer stainless mesh network 22 has a 200 mesh.

In the diatomaceous earth filter according to the present invention configured as described above, in the process of passing the wastewater of the filtration tank 10 through the outer stainless mesh network 22 and the inner stainless perforated mesh 21 of the filtration unit 20, the outer stainless mesh network 22 ), the wastewater is filtered by the diatomaceous earth, and the filtered water inside the filtration unit 20 passes through the first connection pipe 26 and the second connection pipe 27. discharged to the outside

Here, in the present invention, the inner stainless perforated net 21 and the outer stainless mesh net 22 of the filtration unit 20 are made of stainless material, so when filtering acidic wastewater or basic wastewater, like a general filter cloth sold on the market Not only does it not corrode, but it is not torn by sharp substances mixed in wastewater, so the filtration unit 20 can be repeatedly used for a long time.

Referring to FIG. 3, in the diatomaceous earth filter according to the present invention, the first inlet and outlet pipes L1 and the second inlet and outlet pipes L2 are connected to the selective supply pipe L5, and the first valve ( V1) and the second valve (V2) are mounted, and one end of the pumping supply pipe (L6) is connected to the selection supply pipe (L5) between the first valve (V1) and the first valve (V2), and the pumping supply pipe (L6) A third valve (V3) and a pump (P) are installed, the other end of the pumping supply pipe (L6) is connected to the first tank (T1), and one end of the diatomaceous earth supply pipe (L7) is connected to the pumping supply pipe (L6), , The other end of the diatomaceous earth supply pipe (L7) is connected to the second tank (T2), the fourth valve (V4) is attached to the diatomaceous earth supply pipe (L7), and the second tank (T2) and the diatomaceous earth separator (T3) collect diatomaceous earth It is connected by the pipe (L8), one end of the first discharge pipe (L9) is connected to the connection point of the first inlet and outlet pipe (L1) and the selective supply pipe (L5), and the fifth valve (V5) is connected to the first discharge pipe (L9). ) is mounted, one end of the second discharge pipe (L10) is connected to the connection point of the second inlet and outlet pipe (L2) and the selective supply pipe (L5), and the sixth valve (V6) is mounted on the second discharge pipe (L10) , The first discharge pipe (L9) and the second discharge pipe (L10) are respectively connected to the third discharge pipe (L11), the seventh valve (V7) is mounted on the third discharge pipe (L11), and the third discharge pipe (L11) It is connected to the diatomaceous earth separator (T3), one end of the diatomaceous earth discharge pipe (L12) is connected to the third discharge pipe (L11), and the diatomaceous earth discharge pipe (L12) is disposed between the first discharge pipe (L9) and the second discharge pipe (L10), , The other end of the diatomaceous earth discharge pipe (L12) is connected to the second tank (T2), the 11th and 12th valves (V11, V12) are mounted on the first and second filtered water discharge pipes (L3, L4), respectively, and the first And the second filtered water discharge pipe (L3, L4) is connected to the first filtered water recovery pipe (L13), one end of the second filtered water recovery pipe (L14) is connected to the first filtered water recovery pipe (L13), the second filtered water recovery The thirteenth valve (V13) in the pipe (L14) is mounted, the other end of the second filtered water recovery pipe (L14) is connected to the first tank (L13), one end of the bypass pipe (L15) for backwashing is connected to the pumping supply pipe (L6), and the bypass pipe A 14th valve (V14) is mounted on (L15), and the other end of the bypass pipe (L15) is connected to the first filtered water recovery pipe (L13).

The operation of the diatomaceous earth filter according to the present invention configured as described above will be described with reference to FIGS. 3 to 7.

3 and 4 show that before filtering the wastewater stored in the first tank T1, diatomaceous earth is applied to the filtration tank 10 so that the diatomaceous earth is coated (attached) to the outer stainless mesh 22 of the filtration unit 20. The supplying process is shown.

First, as shown in FIG. 3, the fourth valve V4, the first valve V1, the sixth valve V6, and the ninth valve V9 are open, and the pump P is in a state where the remaining valves are closed. is activated The water containing diatomaceous earth in the second tank T2 by the pump P passes through the diatomaceous earth supply pipe L7, the pumping supply pipe L6, the selective supply pipe L5, and the first input/output pipe L1 to the filtration tank 10. ) is supplied. Thereafter, in the filtration tank 10, a part of the diatomaceous earth is attached to the outer stainless mesh net 22, and the remaining diatomaceous earth is discharged to the second discharge pipe L10 through the second inlet and outlet pipe L2, and then the second discharge pipe ( The circulation process of being supplied from L10) to the second tank T2 through the third discharge pipe L11 and the diatomaceous earth discharge pipe L12 is repeated for a certain period of time (eg, about 5 to 10 minutes).

Then, as shown in FIG. 4, the fourth valve (V4), the second valve (V2), the fifth valve (V5), and the ninth valve (V9) are opened, and the pump (P) is activated Water containing diatomaceous earth in the second tank T2 by the pump P passes through the diatomaceous earth supply pipe L7, the pumping supply pipe L6, the selective supply pipe L5, and the second inlet and outlet pipe L1 to the filtration tank 10 ) is supplied. Thereafter, in the filtration tank 10, a part of the diatomaceous earth is attached to the outer stainless mesh net 22, and the remaining diatomaceous earth is discharged to the first discharge pipe L9 through the first inlet and outlet pipe L1, and then the first discharge pipe ( The circulation process of supplying from the L9) to the second tank T2 through the third discharge pipe L11 and the diatomaceous earth discharge pipe L12 is repeated for a predetermined time (eg, about 5 to 10 minutes).

As described above, in the present invention, when coating diatomaceous earth on the outer stainless mesh net 22 of the filtration unit 20, the diatomaceous earth is supplied to the filtration tank 10 through the first inlet and outlet pipe L1, and water containing diatomaceous earth is supplied. In the process of flowing from the top to the bottom of the filtration tank 10, diatomaceous earth is coated on the outer stainless mesh net 22 and diatomaceous earth is supplied to the filtration tank 10 through the second inlet and outlet pipe L2, In the process of the water containing diatomaceous earth rising from the lower part of the filtration tank 10 to the upper part, the diatomaceous earth is evenly coated on the outer stainless mesh net 22 by dividing the diatomaceous earth into a process to be coated on the outer stainless mesh net 22.

When the diatomaceous earth coating process described with reference to FIGS. 3 and 4 is completed, as shown in FIG. 5 , the wastewater in the first tank T1 is filtered.

That is, the third valve V3, the first and second valves V1 and V2, the eleventh valve V11, the twelfth valve V12, and the thirteenth valve V13 are open, and the remaining valves are closed. In the pump (P) is operated. Then, the wastewater in the first tank T1 is pumped by the pump P through the pumping supply pipe L6, the selective supply pipe L5, the first input/output pipe L1 and the second input/output pipe L2 to the filtration tank ( 10), and in the process of passing through the filtration unit 20 in the filtration tank 10, contaminants adhere to the diatomaceous earth coated on the outer stainless mesh net 22, thereby filtering the wastewater. Thereafter, the process of circulating the filtered water to the first tank T1 through the first and second filtered water discharge pipes L3 and L4 is repeated for a predetermined time (approximately 10 minutes).

As such, the present invention supplies wastewater to the inside of the filtration tank 10 through the first inlet and outlet pipes L1 and the second inlet and outlet pipes L2, so that contaminants are removed from the diatomaceous earth coated on the outer stainless mesh net 22. may be evenly adhered, and when the wastewater in the first tank T1 is filtered through a filtration circulation process for a certain period of time, the filtered wastewater is discharged and new wastewater is supplied to the first tank T1.

Referring to FIG. 6, when the measured pressure of the pumping supply pipe (L6) increases and the measured pressure reaches the set pressure in the process of filtering the wastewater in the first tank (T1) as described above, the filtration unit (20) ) to solve the clogging by attaching contaminants to the outer stainless mesh network 22.

That is, the third valve V3, the fifth valve V5, the sixth valve V6, the tenth valve V10, the eleventh valve V11, the twelfth valve V12, and the fourteenth valve V14 ) is open, and the pump (P) operates while the other valves are closed. The wastewater of the first tank T1 is pumped by the pump P through the pump supply pipe L6, the bypass pipe L15, the first filtered water recovery pipe L13, the first filtered water discharge pipe L3, and the second filtered water discharge pipe ( L4) is supplied to the inside of the filtration unit 20, and in the process of passing through the inner stainless perforated mesh 21 and the outer stainless mesh 22 inside the filtration unit 20, the outer stainless mesh net ( 22) to separate diatomaceous earth and contaminants attached to it and backwash it. Thereafter, diatomaceous earth and contaminants are supplied from the filtration tank 10 to the diatomaceous earth separator T3 through the first inlet and outlet pipe L1, the first outlet pipe L9 and the third outlet pipe L11, as well as supplied to the second inlet and outlet pipe. (L2), the second discharge pipe (L10) and the third discharge pipe (L11) are discharged to the diatomaceous earth separator (T3).

Further, in the diatomaceous earth separator T3, diatomaceous earth and contaminants are separated, the contaminants are separately discharged to the outside, and the diatomaceous earth is recovered to the second tank T2 through the diatomaceous earth recovery pipe L8.

Thereafter, in the present invention, after performing the diatomaceous earth coating process described above, the wastewater filtration process is performed again, and when the pressure in the pipe increases in the wastewater filtration process, the backwashing process is repeated.

As described above, the diatomaceous earth filter according to the present invention has the following advantages.

In the diatomaceous earth coating process, diatomaceous earth is filtered by alternately supplying diatomaceous earth to the filtration tank 10 through the first inlet and outlet pipes L1 and supplying it to the filtration tank 10 through the second inlet and outlet pipes L2. It can be evenly coated on the outer stainless mesh net 22 of the unit 20.

In the filtration process, wastewater is simultaneously supplied to the filtration tank 10 through the first inlet and outlet pipes L1 and the second inlet and outlet pipes L2, so that the wastewater is evenly distributed throughout the filtration unit 20 disposed inside the filtration tank 10. It has the advantage that a filtration operation is performed.

In the backwashing process, diatomaceous earth and contaminants degassed in the backwashing process are supplied to the diatomaceous earth separator (T3), the contaminants and diatomaceous earth are separated in the diatomaceous earth separator (T3), and the separated diatomaceous earth is supplied to the second tank (T2) Thus, there is an advantage of recycling diatomaceous earth.

10: filtration tank 20: filtration unit
21: inner stainless perforated network 22: outer stainless mesh network

Claims (5)

A plurality of filtration units 20 are arranged inside the filtration tank 10, the first inlet and outlet pipes L1 and the second inlet and outlet pipes L2 are connected to the top and bottom of the filtration tank 20, and the filtration unit The upper and lower ends of 20 are connected to the first and second filtered water discharge pipes L3 and L4,
The filtration unit 20 is composed of a cylindrical inner stainless perforated mesh 21 and an outer stainless mesh mesh 22 surrounding the inner stainless perforated mesh 21, and the inner stainless perforated mesh 21 and the outer stainless mesh mesh 22 ) is coupled by a plurality of bolts 23 and nuts, the upper blocking plate 24 and the lower blocking plate 25 are mounted on the upper and lower ends of the inner stainless steel perforated net 21, respectively, and the upper blocking plate 24 The first connection pipe 26 is connected to the lower blocking plate 25, the second connection pipe 27 is connected, the first connection pipe 26 is connected to the first filtered water discharge pipe L3, 2 The connection pipe 26 is connected to the second filtered water discharge pipe L4, and the diatomaceous earth supplied to the inside of the filter tank 10 through the first inlet pipe L1 or the second inlet pipe L2 is supplied to the outer stainless mesh. Attached to the net 22,
The first input/output pipe (L1) and the second input/output pipe (L2) are connected to the selection supply pipe (L5), the first valve (V1) and the second valve (V2) are mounted on the selection supply pipe (L5), One end of the pumping supply pipe (L6) is connected to the selective supply pipe (L5) between the valve (V1) and the first valve (V2), and the third valve (V3) and the pump (P) are mounted on the pumping supply pipe (L6), , The other end of the pumping supply pipe (L6) is connected to the first tank (T1), one end of the diatomaceous earth supply pipe (L7) is connected to the pumping supply pipe (L6), and the other end of the diatomaceous earth supply pipe (L7) is connected to the second tank (T2) , the fourth valve (V4) is mounted on the diatomaceous earth supply pipe (L7), the second tank (T2) and the diatomaceous earth separator (T3) are connected by the diatomaceous earth recovery pipe (L8), and the first inlet and outlet pipe (L1) ) and the selective supply pipe (L5), one end of the first discharge pipe (L9) is connected, the fifth valve (V5) is mounted on the first discharge pipe (L9), and the second input/output pipe (L2) and the selective supply pipe One end of the second discharge pipe (L10) is connected to the connection point of (L5), the sixth valve (V6) is mounted on the second discharge pipe (L10), and the first discharge pipe (L9) and the second discharge pipe (L10) are Each is connected to the third discharge pipe (L11), the seventh valve (V7) is mounted on the third discharge pipe (L11), the third discharge pipe (L11) is connected to the diatomaceous earth separator (T3), and the third discharge pipe (L11) One end of the diatomaceous earth discharge pipe L12 is connected to the diatomaceous earth discharge pipe L12, the diatomaceous earth discharge pipe L12 is disposed between the first discharge pipe L9 and the second discharge pipe L10, and the other end of the diatomaceous earth discharge pipe L12 is disposed in the second tank T2. , the 11th and 12th valves V11 and V12 are mounted on the first and second filtered water discharge pipes L3 and L4, respectively, and the first and second filtered water discharge pipes L3 and L4 collect the first filtered water. It is connected to the pipe (L13), one end of the second filtered water recovery pipe (L14) is connected to the first filtered water recovery pipe (L13), and a thirteenth valve (V13) is mounted on the second filtered water recovery pipe (L14), The other end of the second filtered water recovery pipe (L14) is It is connected to the tank (L13), one end of the bypass pipe (L15) for backwashing is connected to the pumping supply pipe (L6), a 14th valve (V14) is mounted on the bypass pipe (L15), and the bypass pipe The diatomaceous earth filter, characterized in that the other end of (L15) is connected to the first filtered water recovery pipe (L13). delete According to claim 1,
When the diatomaceous earth coating is fixed, the fourth valve (V4), the first valve (V1), the sixth valve (V6), and the ninth valve (V9) are opened, and the pump (P) is operated while the remaining valves are closed, The water containing diatomaceous earth in the second tank T2 by the pump P passes through the diatomaceous earth supply pipe L7, the pumping supply pipe L6, the selective supply pipe L5, and the first input/output pipe L1 to the filtration tank 10. ) is supplied. Thereafter, in the filtration tank 10, a part of the diatomaceous earth is attached to the outer stainless mesh net 22, and the remaining diatomaceous earth is discharged to the second discharge pipe L10 through the second inlet and outlet pipe L2, and then the second discharge pipe ( After the circulation process supplied from L10) to the second tank T2 through the third discharge pipe L11 and the diatomaceous earth discharge pipe L12 is repeated for a certain period of time,
The 4th valve (V4), the 2nd valve (V2), the 5th valve (V5), and the 9th valve (V9) are open, and the pump (P) is operated in the state where the remaining valves are supported, so that the pump (P) Water containing diatomaceous earth in the second tank T2 is supplied to the filtration tank 10 through the diatomaceous earth supply pipe L7, the pumping supply pipe L6, the selective supply pipe L5, and the second input/output pipe L1. Thereafter, in the filtration tank 10, a part of the diatomaceous earth is attached to the outer stainless mesh net 22, and the remaining diatomaceous earth is discharged to the first discharge pipe L9 through the first inlet and outlet pipe L1, and then the first discharge pipe ( The diatomaceous earth filter, characterized in that the circulation process of supplying from L9) to the second tank (T2) through the third discharge pipe (L11) and the diatomaceous earth discharge pipe (L12) is repeated for a predetermined time. According to claim 1,
During the wastewater filtration process, the third valve V3, the first and second valves V1 and V2, the eleventh valve V11, the twelfth valve V12, and the thirteenth valve V13 are opened, and the remaining valves are opened. In the closed state, the pump (P) is operated. Then, the wastewater in the first tank T1 is pumped by the pump P through the pumping supply pipe L6, the selective supply pipe L5, the first input/output pipe L1 and the second input/output pipe L2 to the filtration tank ( 10), and in the process of passing through the filtration unit 20 in the filtration tank 10, contaminants adhere to the diatomaceous earth coated on the outer stainless mesh net 22, thereby filtering the wastewater. Thereafter, the filtered water is circulated to the first tank (T1) through the first and second filtered water discharge pipes (L3, L4), and the process is repeated for a predetermined time. According to claim 1,
During the backwash process, the third valve (V3), the fifth valve (V5), the sixth valve (V6), the tenth valve (V10), the eleventh valve (V11), the twelfth valve (V12), and the fourteenth valve When the valve V14 is opened and the other valves are closed, the pump P is operated so that the wastewater in the first tank T1 is pumped by the pump P to the supply pipe L6 and the bypass pipe L15. , The first filtered water recovery pipe (L13), the first filtered water discharge pipe (L3) and the second filtered water discharge pipe (L4) are supplied to the inside of the filtration unit 20 sequentially, and is supplied from the inside of the filter unit 20 to the inside In the process of passing through the stainless perforated net 21 and the outer stainless mesh net 22, the diatomaceous earth and contaminants attached to the outer stainless mesh net 22 are separated and backwashed, and the diatomaceous earth and contaminants are removed from the filter tank 10 is supplied to the diatomaceous earth separator (T3) through the first inlet and outlet pipe (L1), the first discharge pipe (L9) and the third discharge pipe (L11), as well as the second inlet and outlet pipe (L2), the second discharge pipe (L10) and 3 It is discharged to the diatomaceous earth separator (T3) through the discharge pipe (L11), and the diatomaceous earth and contaminants are separated in the diatomaceous earth separator (T3), the pollutants are separately discharged to the outside, and the diatomaceous earth is removed through the diatomaceous earth recovery pipe (L8). A diatomaceous earth filter, characterized in that it is returned to 2 tanks (T2).

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