KR101029589B1 - Combined Water Treatment Equipment with Multiple Straw Membrane - Google Patents

Abstract

The present invention is the raw water is introduced by the inlet pipe and the bottom of the treatment tank is connected to the drain pipe is opened and closed by the drain valve; A plurality of filtration units installed in the treatment tank, having a base member having an inner space, and multiple straw filter membranes disposed side by side on an upper surface of the base member so as to communicate with an inner space of the base member; A connection pipe coupled to the base member to discharge water filtered by the straw filtration membrane to the outside of the treatment tank; A back washing tube connected to the connection pipe to supply a portion of the filtered water to any one of the plurality of filtration units to clean the straw filter membrane; And a cleaning pump installed on a path of the backwashing pipe and providing a driving force to suck a portion of the filtered water, wherein a part of the filtered water supplied to the filtration unit through the backwashing pipe is disposed through the base member. A composite water treatment device configured to be supplied to a lower end of a multi straw filter membrane.

Water treatment device, straw filtration membrane

Description

Water treatment apparatus having multiple straw filters

The present invention relates to a water treatment apparatus, and more particularly, to a complex water treatment apparatus having a plurality of filtration membrane units composed of multiple straw filtration membranes in a single treatment tank and effectively purifying raw water through sequential washing.

Common water treatment processes include flocculation precipitation, flotation separation, filtration and advanced oxidation processes. Agglomeration precipitation is injecting a floc-forming chemical (coagulant) into the raw water to be treated so that the colloidal particles and fine solids dispersed in the water are entangled with the flocculant to form agglomerates.

Flotation separation process is a method of floating by floating the fine air particles in the water to be attached to the solids or contaminated particles contained in the water to float to the surface to separate.

As is known, the filtration process uses a medium such as sand, activated carbon, or filtration membranes to separate contaminants contained in raw water. An advanced oxidation process irradiates ultraviolet (UV) rays while injecting ozone into the water or emitting ozone. By inducing photolysis and oxidation reaction of ozone, it is a process of decomposing, sterilizing and purifying compounds.

The conventional water treatment apparatus is designed to include the above processes individually or to combine a plurality of processes as necessary, in which case the apparatus has to be enlarged.

In addition, in order to increase the filtration efficiency, a technique has been proposed in which a plurality of filtration tanks are provided to purify raw water, and at the same time, a reverse flow is applied to each filtration tank and washed.

However, in the conventional water treatment system equipped with multiple filtration tanks, since the washing water is discharged to the outside, the actual water treatment capacity is not short, and there are structural limitations in introducing various water treatment processes such as sedimentation function and flotation separation. there was.

The present invention was made in view of the above problems, and an object of the present invention is to provide a complex water treatment apparatus capable of maximizing water treatment capability by employing a plurality of filtration units having multiple straw filtration membranes in a single treatment tank.

Still another object of the present invention is to provide a complex water treatment apparatus configured to sequentially wash back a plurality of filtration units in order to clean the contaminants adsorbed on the filtration membrane, but not to discharge the washing water to the outside.

It is still another object of the present invention to provide a complex water treatment apparatus in which the washing water is supplied to the lower end of the filtration unit so that the washing can be performed at a uniform pressure over the entire length of the filtration membrane.

It is still another object of the present invention to provide a complex water treatment apparatus that is integrally configured to simultaneously perform coagulation sedimentation, flotation, fine filtration and advanced oxidation treatment processes for raw water while having a plurality of filtration units in a single treatment tank. .

Complex water treatment apparatus according to a preferred embodiment of the present invention to achieve the above object, the raw water is introduced by the inlet pipe and the treatment tank connected to the drain pipe is opened and closed by a drain valve on the bottom; A plurality of filtration units installed in the treatment tank, having a base member having an inner space, and multiple straw filter membranes disposed side by side on an upper surface of the base member so as to communicate with an inner space of the base member; A connection pipe coupled to the base member to discharge water filtered by the straw filtration membrane to the outside of the treatment tank; A back washing tube connected to the connection pipe to supply a portion of the filtered water to any one of the plurality of filtration units to clean the straw filter membrane; And a cleaning pump installed on a path of the backwashing pipe and providing a driving force to suck a portion of the filtered water, wherein a part of the filtered water supplied to the filtration unit through the backwashing pipe is disposed through the base member. It is fed to the bottom of the multi straw filter membrane.

Preferably, the composite water treatment device of the present invention, the drive valve for opening and closing the connecting pipe; And a driving valve for opening and closing the back washing pipe, wherein the plurality of filtration units are sequentially cleaned, and in the filtration unit in which the filtration is performed, a driving valve for opening and closing the connecting pipe opens the connecting pipe and at the same time. A driving valve for opening and closing the customs pipe closes the back washing pipe, and in the filtration unit where cleaning is performed, a driving valve for opening and closing the connecting pipe closes the connecting pipe and simultaneously opens and closes the back washing pipe. It is composed.

Preferably, the first drive valve and the second drive valve is integrally formed by a three-way valve.

More preferably, the apparatus of the present invention further includes a filtrate flow pipe through which the filtered water discharged through the connecting pipe is filtered in the plurality of filtration units, and the backwash tube is configured to be connected to the filtrate flow pipe.

In addition, the back washing pipe may further include a washing water flow pipe connected to all of the connection pipe of the respective filtration unit.

As another alternative, it may further comprise an air compressor for injecting compressed air into the backwashing tube.

The overflow pipe is installed in the center of the treatment tank.

According to the apparatus of the present invention, the apparatus further includes a high-grade oxidizing tank having a plurality of ultraviolet lamp units installed side by side, supplied with ozone by an ozone supply means, and configured to introduce filtered water from the filtration unit.

Preferably, the ozone supply means, ozone generator for generating ozone; And an ozone acid device for injecting ozone generated by the ozone generator into the advanced oxidizing tank.

More preferably, the apparatus of the present invention includes an ozone recovery pipe for sucking residual ozone accumulated in the upper portion of the advanced oxidizing tank; And recovery ozone supply means for supplying residual ozone sucked through the ozone recovery pipe into the treatment tank.

The apparatus of the present invention may further comprise a recovery ozone dispersing device for injecting ozone supplied by said recovery ozone supply means from the bottom of said treatment tank toward the upper water surface.

Preferably, the end of the inlet pipe is connected to the distribution pipe is installed in the upper portion of the treatment tank in a circular shape, the distribution pipe is a plurality of inflows of the raw water flowing in the one direction in a state extending in a predetermined length toward the bottom The tube is formed.

According to a more preferred embodiment of the present invention, the advanced oxidation tank further includes a balancing tank integrally formed along the outer wall of the treatment tank and integrally formed along the outer wall of the treatment tank so that purified water treated in the advanced oxidation tank is introduced. The overflow wall is formed between the advanced oxidation tank and the balancing tank.

The complex water treatment apparatus according to the present invention can maximize the filtration area by employing multiple straw filters in a single treatment tank, thereby maximizing the water treatment capacity despite the narrow installation space.

In addition, since the plural filtration units are sequentially washed to clean the contaminants adsorbed on the multi-straw filtration membrane, the washing water is not discharged to the outside, thereby increasing the water treatment efficiency.

Furthermore, since the washing water is supplied to the lower end of the filtration unit in consideration of the water pressure, the washing may be performed at a uniform pressure over the entire length of the filtration membrane.

In addition, the composite water treatment apparatus of the present invention enables to perform coagulation sedimentation, flotation separation and advanced oxidation treatment processes simultaneously in a single treatment tank while performing microfiltration by a plurality of filtration units, thereby greatly reducing installation space and manufacturing cost. On the other hand, a better water treatment effect can be achieved.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 and 2 show a schematic configuration of a complex water treatment apparatus according to a preferred embodiment of the present invention. Here, FIG. 2 is an expanded view of the filtration unit and pipes shown in FIG. 1 for convenience of description. In addition, in the above figure, it is noted that the pipe through which water or ozone is conveyed is abbreviated as a solid line for convenience.

The complex water treatment device according to the present invention can be used to purify water in a closed body of water, such as a pond, but is not necessarily limited to this purpose and can be widely applied to treat purified water, sewage, wastewater and other contaminated water.

Raw water to be treated by the apparatus of the present invention is introduced into the complex water treatment apparatus according to the embodiment of the present invention through the inlet pipe 10.

As shown, the complex water treatment apparatus includes a treatment tank 20 for processing raw water. The treatment tank 20 is preferably formed in a cylindrical shape, but is not necessarily limited thereto. The lower end of the treatment tank 20 forms a funnel shape, and the drain pipe 11 is connected to the bottom. The drain pipe 11 is configured to be opened and closed by the drain valve 12.

The inlet pipe 10 is extended to the upper portion of the treatment tank 20 and supplies raw water to be treated by the filtration pump 13 installed on the path of the inlet pipe 10. Although it is illustrated in this embodiment that the inlet pipe 10 is installed on the upper portion of the treatment tank 20, the present invention is not limited thereto, and the inlet pipe 10 may be installed in the middle or bottom of the treatment tank 20. have.

Preferably, the end of the inlet pipe 10 is connected to the distribution pipe 14 is installed in a circular shape on top of the treatment tank 20, the distribution pipe 14 is formed with a plurality of inlet pipe 15 have. The water supply pipe 15 is bent in one direction (clockwise or counterclockwise) with respect to the central axis of the treatment tank 20 in a state extending from the distribution pipe 14 toward the bottom by a predetermined length The raw water introduced into the distribution pipe 14 through the inflow pipe 10 is turned in the clockwise or counterclockwise direction inside the treatment tank 20 while flowing through the inlet pipe 15.

According to the present invention, a plurality of filtration units 30 are provided in the treatment tank 20. That is, the filtration unit 30 may be installed side by side while being spaced apart from each other in the treatment tank 20, as shown in FIG. In this embodiment, a total of seven filtration units 30 are installed in the treatment tank 20.

The filtration unit 30 includes a base member 31 having a space formed therein, and a plurality of straw filtration membranes 32 arranged side by side on an upper surface of the base member 31. The straw filtration membrane 32 is an elongated cylindrical membrane such as a straw, and contaminates particles as water passes vertically through the side wall.

The straw filter membrane 32 may be manufactured by rolling a mesh in which fine holes are formed in a round shape, and may be configured in several layers. Typically, the filtration membrane may be made of stainless steel or synthetic resin or fiber, but is not limited thereto, and a filtration membrane of various materials capable of filtering water may be employed.

Thus, although the present invention consists of a single treatment tank, the filtration area can be increased by employing the multiple straw filter membrane 32.

Preferably, the straw filtration membranes 32 arranged on the base member 31 are arranged to be mutually triangular as shown in FIG. 4 in order to install the multiple straw filtration membranes 32 at uniform intervals.

 The opening degree, diameter, length, number, and installation interval of the multiple straw filtration membrane 32 may be appropriately set according to the treatment grade of the water, the treatment capacity of the treatment tank, and the like.

The multi straw filter membrane 32 has a lower end fixed to the base member 31 so that internal spaces communicate with each other, and the base member 31 is installed outside the treatment tank 20 through a connection pipe 16. It is connected to the filtered water flow pipe (17).

The filtrate flow pipe 17 joins the filtrate treated in the filtration unit 30 to supply the advanced oxidation tank 40 to be described later, and preferably, to surround the lower portion of the treatment tank 20 roundly. It extends annularly and is connected with each filtration unit 30.

In addition, a drive valve 18 is installed on the connection pipe 16 for opening and closing a path through which the filtered water treated in each of the filtration units 30 flows into the filtrate flow pipe 17.

According to the present invention, washing means for backwashing the filtered water is provided to remove sludge or contaminants adsorbed on the straw filtration membrane 32 of the respective filtration units 30.

The washing means is provided with a back washing tube 21 for supplying a part of the water filtered by the filtration unit 30 back into the filtration unit 30, and on the path of the back washing tube 21. It includes a cleaning pump 22 that provides a driving force to suck a portion of the filtered water.

Preferably, one end of the backwashing pipe 21 is connected to the filtered water flow pipe 17 through which the filtered water flows and sucks a portion of the filtered water therefrom, and the other end is connected to the base member 31 in communication with the connecting pipe ( 16).

More preferably, the backwashing pipe 21 includes a washing water flow pipe 23 extending in an annular shape so as to surround the lower portion of the treatment tank 20 so as to be connected to each filtration unit 30. The flow pipe 23 is connected to all the connection pipes 16 of each filtration unit 30.

In addition, a valve for separately opening and closing a path for supplying a portion of the filtered water to each of the filtration units 30 is provided on the path of the backwashing pipe 21. 18) and the function can be integrated to be implemented as a 3-way valve. That is, as shown in (a) of FIG. 5, when the filtration unit 30 performs the function of filtering the raw water, the back washing tube 21 is closed instead of opening the connecting pipe 16. On the other hand, when cleaning the filtration unit 30, as shown in Figure 5 (b), instead of closing the connecting pipe 16, the back washing tube 21 is opened.

According to another preferred embodiment of the present invention, an air compressor (AC) may be further installed to increase pressure on the backwashed water by blowing compressed air to promote the dropping of the contaminants adsorbed on the straw filtration membrane 32. have. The air compressor AC supplies compressed air to the backwashing tube 21 so that the filtered water supplied to the filtration unit 30 is sprayed harder and at the same time eliminates contaminants by the compressed air itself.

The overflow pipe 19 is installed in the center of the treatment tank 20, the overflow pipe 19 is connected to the drain pipe 11 through the overflow pipe 24. The top height of the overflow pipe 19 determines the highest water level in the treatment tank 20.

The contaminants contained in the raw water introduced into the treatment tank 20 are flocculated and precipitated or floated on the surface with fine bubbles while passing through the swirl flow, and the precipitated contaminants are separated from the water by opening the drain valve 12. And discharged to the outside through the drainage pipe 11, and the contaminants separated from the flotation are also overflowed to the overflow pipe 19 with water and discharged to the outside through the overflow pipe 24 and the drain pipe 11. .

According to an embodiment of the present invention, the filtered water filtered by the filtration unit 30 is introduced into the advanced oxidation tank (40) through the connecting pipe (16). The connecting pipe 16 is connected to the filtrate flow pipe 17, the filtrate flow pipe 17 is configured to be connected to the advanced oxidation tank (40).

Preferably, the advanced oxidation tank 40 is formed integrally with the treatment tank 20. Here, the meaning that the advanced oxidation tank 40 and the treatment tank 20 are integrally formed means that at least a portion of the outer wall is in contact with each other.

More preferably, the advanced oxidation tank 40 is integrally formed along the outer wall of the treatment tank 20 as shown in FIG.

If such a configuration, there is no need for a separate space for installing the advanced oxidizing tank 40, there is no need to connect the connecting pipe 16 for a long time and install a transfer pump, the overall device becomes very compact.

The advanced oxidation tank 40 performs an AOP (Advanced Oxidation Process) process to sterilize, purify and deodorize water by the simultaneous action of ultraviolet light and ozone (O ₃ ).

1, 3 and 6 together, a plurality of ultraviolet lamp unit 25 is installed in the vertical oxidation tank 40 in the vertical direction. In FIG. 6, a cable for supplying power to the ultraviolet lamp unit 25 is omitted for convenience.

The ultraviolet lamp unit 25 includes a transparent tube 26 made of a quartz tube having excellent transmittance and the like, and an ultraviolet lamp 27 mounted in the transparent tube 26. The transparent tube 26 serves to protect the UV lamp 27 from water. A circular line denoted by reference numeral R in FIG. 3 indicates an irradiation area applied to the ultraviolet lamp 27.

In addition, the complex water treatment apparatus according to the present invention further includes an ozone supply means for supplying ozone to the advanced oxidation tank (40).

The ozone supply means includes an ozone generator (see 27 in FIG. 1) for generating and supplying ozone, and the advanced oxidizing tank (40) for injecting ozone supplied by the ozone generator (27) into water in a fine bubble state. It includes an ozone acid mechanism 28 installed therein.

Preferably, the ozone diffuser 28 is installed between the ultraviolet lamp units 25 while being connected to the supply branch pipe 33 to which ozone is supplied through a pipe 29 connected to the ozone generator 27.

The ozone diffuser 28 is sprayed by finely dispersing ozone, and may be preferably in the form of a synthetic resin form or in the form of a mechanical nozzle or membrane.

Preferably, a one-way check valve 34, a drain device 35, and the like are installed on the pipe 29 for supplying ozone to block water from flowing back.

The number, size, and installation interval of the ultraviolet lamp unit 25 and the ozone diffuser 28 are not particularly limited, and may be appropriately set according to the treatment grade of the water, the treatment capacity of the treatment tank, and the like.

In addition, the purified water sterilized in the advanced oxidation tank 40 is introduced into the adjacent balancing tank 41. The balancing tank 41 serves as a space for storing the final water treated in the continuous flow type composite water treatment apparatus according to the present invention to balance the amount of water received and the amount of water discharged.

Preferably, the balancing tank 41 is formed integrally with the outer wall of the treatment tank 20, like the advanced oxidation tank 40, in this case, it is possible to efficiently treat the water while minimizing the size of the overall device.

As can be seen in Figure 6, the overflow wall 42 is formed between the advanced oxidation tank 40 and the balancing tank 41, the water treated in the advanced oxidation tank 40 is the overflow wall 42 It will flow into the balancing tank 41 beyond).

A water outlet 43 is formed at the bottom of the balancing tank 41, and the water outlet pipe 44 is connected thereto.

Although the configuration of the advanced oxidation tank 40 and the balancing tank 41 has been described in detail in the present invention, these components should be construed as not limited to such description, and as another alternative, the advanced oxidation tank and the balancing tank are described. May be separated from the treatment tank and provided in a separate space.

According to a preferred embodiment of the present invention, there is provided a means for recovering the residual components of ozone injected into the advanced oxidation tank 40 by the ozone diffuser 28 and supplying them into the treatment tank 20. One end of the invention is connected to the upper end of the advanced oxidizing tank 40, the ozone recovery pipe 36 for sucking residual ozone accumulated in the advanced oxidizing tank 40 and the suction through the ozone recovery pipe 36 Recovery ozone supply means for supplying residual ozone into the treatment tank 20.

According to this embodiment, the recovery ozone supply means includes a venturi pipe 38 installed in the sub pipe 37 branched from the backwashing pipe 21, the other end of the ozone recovery pipe 36 is the venturi pipe ( 38).

Therefore, a part of the filtrate supplied to the backwashing pipe 21 by the operation of the cleaning pump 22 is branched to the sub pipe 37 and flows to the pressure difference generated when the filtrate passes through the venturi pipe 38. The residual ozone accumulated in the upper portion of the advanced oxidation tank 40 is sucked, and the ozone sucked in this way is mixed with the filtered water and injected into the treatment tank 20.

According to the present invention, the recovered ozone mixed with water is sent through the ozone injection pipe 39 to the recovered ozone acid mechanism 45 installed adjacent to the bottom inner peripheral surface of the treatment tank 20, where the treatment tank 20 ) Is sprayed inside.

Preferably, as shown in FIG. 7, the recovered ozone diffuser 45 is spaced apart in a circular shape while being adjacent to the bottom inner circumferential surface of the treatment tank 20, and a porous membrane 45a is formed on the upper surface thereof. Therefore, the recovered ozone mixed with water is sprayed upward from the inside of the treatment tank 20 through the porous membrane 45a. More preferably, the porous membrane may be made of a synthetic resin foam or a metal membrane so that the recovered ozone can be more finely injected.

In addition, the treatment tank 20 is provided with at least one inspection manhole 47, it is possible to check the state inside the treatment tank 20 and take maintenance measures.

In addition, a cover 48 covering the upper opening of the treatment tank 20 may be further installed. Such a cover 48 may be manufactured to be separated from each other in a semicircular shape as shown in FIG. 8. More preferably, the end portion traversing the central portion prevents sagging down by forming the bent portion 49 or by adding the frame.

Next, a preferable operation of the complex water treatment apparatus of the present invention having the above configuration will be described.

Precipitation process

For example, the raw water introduced from the closed pond is introduced into the treatment tank 20 along the inlet pipe 10 by the driving force of the filtration pump 13.

In this process, the flocculant stored in the vessel (50 of FIG. 1) may be optionally added automatically to further promote the flocculation precipitation reaction. That is, in accordance with the operation of the filtration pump 13, the flocculant stored in the container 50 is sucked into the inlet pipe 10 and mixed with the raw water.

The raw water introduced into the inflow pipe 10 is evenly distributed along the distribution pipe 14 installed in the upper portion of the treatment tank 20 and introduced into the treatment tank 20 through the inlet pipe 15 formed at the lower portion thereof. do.

At this time, the water supply pipe 15 extends to be bent in one direction (clockwise or counterclockwise) with respect to the central axis of the treatment tank 20 in a state extending from the distribution pipe 14 toward the bottom by a predetermined length. The raw water flowing through the water inlet pipe 15 is pivoted inside the treatment tank 20. This turning action not only brings a uniform distribution of raw water, but also serves to collect the contaminants floating on the surface by floating separation as a center to be discharged through the overflow pipe 19 as described below.

The raw water introduced into the treatment tank 20 is settled on the bottom of the treatment tank 20 by sedimentation of contaminated particles contained in the raw water during the turning process as described above. Preferably, when a flocculant is administered, flocs can be formed to precipitate even fine contaminant particles or dissolved solids dispersed in water.

Filtration and Filtration membrane  Cleaning process

Subsequently, the raw water in the treatment tank 20 is filtered while passing through the straw filtration membrane 32 of the filtration unit 30. The driving force for filtration is due to the difference in the water pressure in the treatment tank 20 and the water pressure in the straw filtration membrane 32. The filtered contaminants are attached on the outer surface of the straw filtration membrane 32, and the water flows into the base member 31 through the straw filtration membrane 32 and then through the connection pipe 16 connected to the lower portion thereof. Discharged to the outside of 20.

According to the present invention, while the water is filtered as described above, the plurality of filtration unit 30 is washed sequentially, this cleaning process will be described in more detail with reference to the development of FIG.

First, the first filtration unit 30-1 is washed in the plurality of filtration units 30, and filtration is performed in the remaining second to seventh filtration units 30-2 to 30-7. To this end, the first drive valve 18-1 on the first connection pipe 16-1 connected to the first filtration unit 30-1 is in the state shown in FIG. Instead of closing the connecting pipe 16-1, the first backwashing pipe 21-1 is opened. Operation of the drive valve may be automatically performed by a control unit not shown.

The remaining second to seventh driving valves 18-2 to 18-7 are in a state shown in FIG. 5A, and the second to seventh connecting pipes 16-2 to 16-7 are Instead of opening, the second to seventh back washing pipes 21-2 to 21-7 are all closed.

Thus, the raw water is filtered in the second to seventh filtration units (30-2 to 30-7) and then joined in the filtrate flow pipe (17) through the second to seventh connecting pipes (16-2 to 16-7) Then, it flows to the advanced oxidation tank 40 mentioned later.

As soon as the raw water is filtered, the cleaning means is operated to sequentially clean the filtration unit. First, while the washing pump 22 is driven to clean the first filtration unit 30-1, a part of the filtrate in the filtrate flow pipe 17 is sucked and supplied to the washing water flow pipe 23. At this time, the second to seventh backwashing pipes 21-2 to 21-7 are closed by the second to seventh filtering unit driving valves 18-2 to 18-7, and the first backwashing pipe 21-1. ) Is opened by the first drive valve 18-1, so the filtrate in the filtrate flow pipe 17 is supplied to the first filtration unit 30-1 along the first backwashing pipe 21-1.

The amount of water sucked by the cleaning pump 22 can be adjusted accordingly, and is preferably configured to suck the filtered water in at least one or more filtration units.

More preferably, compressed air may be injected into the backwashing tube 21 by an air compressor (AC) in order to increase the pressure of the filtrate and promote the dropping of contaminants adsorbed on the straw filtration membrane 32.

The filtered water and the compressed air supplied to the first backwashing pipe 21-1 are introduced into the base member 31 of the first filtration unit 30-1, and then sprayed from the inside of the straw filtration membrane 32 to the outside. In this process, the sludge or contaminants adsorbed on the outer surface of the straw filtration membrane 32 are settled downward while being dropped by the sprayed water or a mixture of water and air.

According to the present invention, the washing water for cleaning the straw filtration membrane 32 is supplied to the lower end of the straw filtration membrane 32 connected with the base member 31, which is a very important feature in function. That is, the straw filtration membrane 32 is installed vertically in the treatment tank 20. In this case, a greater pressure than the upper end acts on the lower end. Therefore, in order to eliminate the contaminants adsorbed on the whole straw filter membrane 32, it is necessary to provide a greater injection force to the lower end than the upper end in consideration of the water pressure.

In view of the above, the present invention is configured to supply the filtered water to the bottom of the straw filtration membrane 32 through the base member 31. In this case, since the pressure of the washing water on the bottom portion of the straw filtration membrane 32 is greater than the pressure on the top, the water pressure can be sufficiently overcome and the contaminants can be eliminated. Therefore, the straw filtration membrane 32 can be wash | cleaned with uniform spraying force over the full length.

Otherwise, if the filtered water is supplied to the upper end of the straw filtration membrane 32, the jetting force of the filtered water is insignificant in the bottom portion of the straw filtration membrane 32, where the hydraulic pressure is large, and thus the contaminants cannot be effectively removed.

Another feature of the present invention is that the washing water for cleaning the straw filtration membrane 32 is supplied to the treatment tank 20 and reprocessed without being discharged to the outside. Therefore, it is possible to prevent a decrease in the amount of water due to the filtration membrane cleaning.

Subsequently, after cleaning the straw filter membrane 32 of the first filtration unit 30-1 for a predetermined time, the first drive valve 18-1 is brought into a state as shown in FIG. Instead of opening the pipe 16-1, the first backwashing pipe 21-1 is closed.

At the same time, while the second drive valve 18-2 is brought into the state of FIG. 5 (b) by the controller, the second backwashing pipe 21-2 is opened instead of closing the second connecting pipe 16-2. .

Therefore, this time, while the washing water is supplied to the second filtration unit 30-2 through the second back washing tube 21-2, the straw filtration membrane 32 is washed as described above.

By repeating the above process, the straw filtration membranes 32 of the filtration unit 30 are sequentially cleaned.

Advanced oxidation process

On the other hand, the filtered water filtered in the filtration unit 30 is collected in the filtered water flow pipe 17 is introduced into the advanced oxidation tank (40). Ultraviolet rays are irradiated to the inside of the advanced oxidizing tank 40 by the ultraviolet lamp unit 25, and ozone generated by the ozone generator 27 is minutely diffused through the ozone diffuser 28.

As is known, ozone oxidizes organic and inorganic substances contained in raw water, and oxidizes E. coli, bacteria, viruses, hepatitis and airborne bacteria (Legionella). In addition, ozone inhibits the formation of THM, a carcinogenic substance through oxidation, and also decomposes cyanide, detergent, phenol, manganese, magnesium and the like.

In addition, by ultraviolet rays having a wavelength of about 253 nm emitted from the ultraviolet lamp 27, bacteria, bacteria, viruses, microorganisms, etc. existing in the raw water are destroyed and destroyed.

At the same time, OH-radicals are generated during the decomposition process in which ozone contained in dissolved ozone water is reduced to oxygen by ultraviolet rays, thereby further amplifying oxidizing power. OH-radicals are known to have a higher potential difference than ozone and to react evenly with almost all organic materials at a very high speed. Most organic compounds that react with OH radicals are oxidatively decomposed to water and carbon dioxide. In this way, OH-radicals effectively kill SARS, bird flu, viruses, Mycobacterium tuberculosis, O-157, Salmonella, Listeria, and other infectious flu viruses and bacteria.

After performing the advanced oxidation process as described above, the treated water overflows through the overflow wall 42 and flows into the balancing tank 41, and then discharges the discharge pipe 44 connected to the bottom of the balancing tank 41. Therefore it is withdrawn to subsequent processes.

Preferably, the water outlet pipe 44 may be connected to, for example, activated carbon adsorption treatment apparatus, and the treated water may be re-supplied to a pond or the like and used as heavy water or tap water.

Ozone Recovery and Flotation Separation Process

On the other hand, the residual ozone accumulated in the upper portion of the advanced oxidation tank 40 is introduced into the venturi tube 38 through the ozone recovery pipe 36. That is, the residual ozone is sucked by the pressure difference generated while a part of the filtered water flows through the sub pipe 37 branched from the backwashing pipe 21, and the sucked ozone is mixed with the filtered water to treat the treatment tank 20. It is sent to the internal recovery ozone diffuser 45.

At this time, in the normal state, the interior of the advanced oxidizing tank 40 is in a positive pressure state, but if negative pressure occurs, the one-way check valve 52 may be opened and controlled by introducing external air.

Subsequently, the ozone supplied to the recovered ozone diffuser 45 is injected upward into the treatment tank 20 through the porous membrane 45a together with the filtered water. Thus, there can be various effects obtained by injecting the recovered ozone into the treatment tank 20.

First, the pollutants adsorbed on the inner circumferential surface of the treatment tank are desorbed by the rise of ozone-dissociated gas.

Second, it promotes the purification of raw water by the re-reactive oxidation effect of residual ozone.

Third, it promotes the aggregation of pollutants through the oxidation reaction of ozone.

Fourth, fine contaminant particles are adsorbed onto the ozone-dissociated gas to float above the water surface. At this time, bubbles that rise to the surface while adsorbing contaminants tend to be directed toward the center of the treatment tank 20, and this tendency is further promoted by the turning raw water. Therefore, the floated contaminants may be collected at the center of the treatment tank 20 and discharged to the outside through the overflow pipe 19.

Pollutant discharge

As described above, if sedimentation of contaminants accumulates at the bottom of the treatment tank 20 during raw water treatment, the drain valve 12 is opened and contaminants are discharged.

Such pollutant discharge may be performed automatically or manually. For example, as the amount of contaminants precipitated at the bottom of the treatment tank 20 increases, the filtration load increases, so that the water level inside the treatment tank 20 gradually increases, and when the water level exceeds the reference value, it is time to discharge the precipitate. Judgment and the process can be performed automatically.

According to the present invention, the contaminants deposited in the treatment tank 20 may be maintained without stopping the operation of the water treatment device or blocking the continuous flow of raw water. That is, when the drain valve 12 is opened when the pollutant is required to be discharged, the pollutant that has settled on the bottom of the treatment tank 20 is discharged to the outside through the drain pipe 11 together with the water.

The pollutants discharged to the outside may be subsequently processed using a dehydration tank or the like.

As described above, while the discharge of the contaminant proceeds, the water level inside the treatment tank 20 is lowered by a predetermined amount, but the precipitation, filtration, washing, and advanced oxidation processes may still be continued.

Subsequently, if it is determined that the precipitated contaminants have been discharged to some extent or after a predetermined time has elapsed, the drain valve 12 is automatically closed and the normal water treatment process is continued again.

Although the present invention has been described through specific embodiments, the configuration of the treatment tank or various pipes can be modified as much as necessary. For example, in the present embodiment, the back washing pipe is connected to the connecting pipe and opened and closed by a three-way valve, but as another alternative, the back washing pipe may be configured separately from the connecting pipe and connected to the base member. In this case, the valve for opening and closing the connection pipe and the valve for opening and closing the backwashing pipe may also be configured separately.

Although the present invention will be described in detail with reference to the following drawings, these drawings illustrate preferred embodiments of the present invention, and the technical concept of the present invention is not limited to the drawings and should not be interpreted.

1 is a view showing a schematic configuration of a complex water treatment apparatus having a multi-straw filtration membrane according to a preferred embodiment of the present invention.

FIG. 2 is a view showing an expanded configuration of a filtration unit and a pipe in a complex water treatment apparatus having a multi-straw filtration membrane according to a preferred embodiment of the present invention.

Figure 3 is a plan sectional view showing the configuration of a complex water treatment device having a multi-straw filtration membrane according to a preferred embodiment of the present invention.

Figure 4 is a plan view schematically showing the configuration of the filtration unit in the composite water treatment device having a multi- straw filter membrane according to a preferred embodiment of the present invention.

5a and 5b is a view showing the operating state of the drive valve in the composite water treatment device having a multi-straw filtration membrane according to a preferred embodiment of the present invention.

6 is a cross-sectional view taken along line AA ′ of FIG. 3.

FIG. 7 is a view schematically showing the configuration of a recovered ozone diffuser in a complex water treatment apparatus having multiple straw filtration membranes according to a preferred embodiment of the present invention.

8 is a plan view schematically showing the configuration of a cover of a treatment tank in a composite water treatment device having multiple straw filtration membranes according to a preferred embodiment of the present invention.

Claims (13)

Raw water is introduced by the inlet pipe and the treatment tank is connected to the drain pipe is opened and closed by the drain valve at the bottom; A plurality of filtration units installed in the treatment tank, having a base member having an inner space, and multiple straw filter membranes disposed side by side on an upper surface of the base member so as to communicate with an inner space of the base member; A connection pipe coupled to the base member to discharge water filtered by the straw filtration membrane to the outside of the treatment tank; A back washing tube connected to the connection pipe to supply a portion of the filtered water to any one of the plurality of filtration units to clean the straw filter membrane; And And a cleaning pump installed on a path of the backwashing tube to provide a driving force for sucking a part of the filtered water. And a portion of the filtered water supplied to the filtration unit through the backwashing tube is supplied to the lower end of the multi straw filter membrane through the base member. The method of claim 1, A driving valve for opening and closing the connection pipe; And It includes; a drive valve for opening and closing the back washing pipe; The plurality of filtration units are washed sequentially, In the filtration unit in which the filtration is performed, a drive valve for opening and closing the connection pipe opens the connection pipe, and a drive valve for opening and closing the backwash pipe closes the back pipe, In the filtration unit which the cleaning is performed, the complex water treatment device, characterized in that the drive valve for opening and closing the connecting pipe is configured to close the connection pipe and at the same time the drive valve for opening and closing the back washing pipe to open the back washing pipe. The method of claim 2, And a drive valve for opening and closing the connection pipe and a drive valve for opening and closing the backwashing pipe are integrally formed by a three-way valve. The method according to any one of claims 1 to 3, Further comprising a filtered water flow pipe that is filtered in the plurality of filtration unit and the filtered water discharged through the connection pipes, The backwash pipe is complex water treatment device, characterized in that connected to the filtered water flow pipe. The method of claim 4, wherein The backwashing pipe further comprises a washing water flow pipe connected to all of the connection pipe of each filtration unit. The method of claim 1, The complex water treatment device further comprises an air compressor for injecting compressed air into the backwashing pipe. The method of claim 1, The composite water treatment device further comprises a overflow pipe installed in the center of the treatment tank. The method of claim 1, And a high-grade oxidizing tank having a plurality of ultraviolet lamp units installed side by side, wherein ozone is supplied by an ozone supply means, and configured to introduce water filtered out of the filtration unit. The method of claim 8, The ozone supply means, Ozone generator for generating ozone; And And an ozone diffuser for injecting ozone generated by the ozone generator into the high-grade oxidizing tank. The method of claim 8, An ozone recovery pipe for sucking residual ozone accumulated in the upper portion of the advanced oxidation tank; And And a recovery ozone supply means for supplying residual ozone sucked through the ozone recovery pipe into the treatment tank. The method of claim 10, And a recovery ozone dispersing device for injecting ozone supplied by said recovery ozone supply means from the inside of said treatment tank to the upper part. The method of claim 1, The end of the inlet pipe is connected to the distribution pipe is installed in a circular shape on top of the treatment tank, The distribution pipe is a complex water treatment device is characterized in that a plurality of water inlet pipes are introduced into the raw water while being bent in one direction while extending toward the bottom. The method according to any one of claims 8 to 11, The advanced oxidation bath is integrally formed along the outer wall of the treatment bath, It further comprises a balancing tank integrally formed along the outer wall of the treatment tank so that the purified water treated in the advanced oxidation tank, Complex water treatment device, characterized in that the overflow wall is formed between the advanced oxidation tank and the balancing tank.

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