KR101954760B1 - Water Cleaning System Having Backflushing Filter and Water Cleaning Method thereof - Google Patents

Abstract

The present invention relates to a water purifying system including a backflushing preprocessing filter and a water purifying method for the same. According to the present invention, the water purifying system including the backflushing preprocessing filter is used to purify raw water. The water purifying system includes: a preprocessing filter assembly forming a backwashing flow path discharging filtered foreign substances to the outside by washing the filter in a reverse direction and a water purifying flow path discharging the raw water flowing into an inlet to an outlet by filtering the raw water by the filter, in a 4-way connection structure; a water purifying filter unit comprising multiple filters to purify the raw water filtered through the water purifying flow path of the preprocessing filter assembly in order; a water storage tank storing the purified water discharged through the water purifying filter unit and supplying washing water in a reverse direction to wash the filter of the preprocessing filter assembly; and an alternately supplying device alternately supplying the raw water flowing into the preprocessing filter assembly and the washing water in the reverse direction in accordance with a switching condition which is set in advance. Therefore, according to the present invention, a backflushing structure for discharging pollutants is applied to the preprocessing filter assembly of a UF method so that a flow path for changing the structure of the water purifying flow path and the backwashing flow path is formed. The water purifying system including the backflushing preprocessing filter can extend the life of the preprocessing filter and protect a rear filter and a membrane filter forming the water purifying system.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverse flushing pre-treatment filter,

The present invention relates to a water purification system having a pre-flushing filter and a purification method thereof, and more particularly, to a water purification system using a reverse flushing structure for discharging contaminants to a UF- The present invention relates to a water purification system having a membrane filter and a back filter, which constitute a water purification system, and a reverse flushing filter that can extend the life of the filter.

In regions where waterworks are not installed or where waterworks need to be installed, large amounts of water are used as drinking water by drawing underground water, running water from valleys and rivers (hereinafter referred to as "raw water" .

However, such raw water has a high turbidity due to a large number of floats, and in particular, in the case of an industrial site or a backward region, there is a large amount of heavy metals and odorous organic substances due to waste water discharge and lack of water treatment facilities, Polluted areas.

In order to clean and safely use the raw water with various contamination as such, it is necessary to equip a large water purification plant such as a water purification plant through several steps.

However, since the facilities for equipping such a large water treatment plant are very expensive, they are unable to provide high-priced large-scale water treatment facilities. Most of them use purified water through a small water treatment system. The safety is considerably deteriorated.

On the other hand, conventional water purifier systems for purifying raw water such as ground water are structured to purify water by using various types of filters such as a sediment filter or a reverse osmosis filter that filters most sediment.

1 is a view showing a water purifier in which a plurality of water filters are installed according to the related art.

Here, the conventional filter-type purifier may be a sediment filter 1, a pre-carbon filter 2, an ultrafiltration (UF) (or microfiltration) filter (or reverse osmosis filter) 3, and a post-carbon filter 4 in this order. In this case, a water stream due to the water pressure of the water can be formed.

In the reverse osmosis pressure water purifier according to the related art, water is passed through the sedimentation filter, the pre-carbon filter, the pressure pump, the reverse osmosis filter, and the post-carbon filter in the order of filtration, It can be purified by passing it through an osmotic pressure filter.

However, in the case of a contaminated area, since the filter used in the above-mentioned manner is frequently clogged, it is difficult to manage and it can not guarantee a large amount of purified water. Therefore, in case where a large amount of water is needed, There is a problem that the efficiency is very low.

In particular, in the case of the reverse osmosis water purifier having an excellent water purification effect, there is a problem that the water source is exhausted because a large amount of raw water (60 to 70%) is to be used when the water is used in a contaminated area. In order to treat a large amount of raw water, There is a problem that the maintenance cost is increased because the cycle is shortened.

Therefore, there is a need for a realistic and applicable technology that can improve the water purification effect in the water purification system and extend the service life of the filter, thereby reducing the maintenance cost.

Patent Registration No. KR 10-1285605 (Notification date July 13, 2013)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a flow reversing structure for purifying purified water and backwashing oil by applying a reverse flushing structure for discharging contaminants to a UF- And a reverse flushing pretreatment filter that protects the membrane filter and the rear stage filter constituting the water purification system and can extend the life of the pretreatment filter.

The present invention provides a water purification system for purifying raw water in a contaminated area, comprising: a purified water flow path for filtering the raw water flowing into the inlet into a filter and discharging the filtered water to an outlet; A pretreatment filter assembly for washing the filter in a reverse direction to form a backwash channel for discharging the filtered foreign matter to a 4-way connection structure; A water filter unit comprising a plurality of filters for sequentially purifying raw water filtered through a purified water passage of the pre-treatment filter assembly; A water storage tank for storing purified water discharged through the water filter unit and supplying reverse washing water for washing the filter of the pretreatment filter assembly; And a cross supply device for supplying raw water flowing into the pre-treatment filter assembly and reverse washing water in accordance with preset switching conditions.

The cross feeding device may include a plurality of regulating valves for regulating a moving direction of water supplied through the purified water passage and the backwashing passage; And a plurality of flow rate regulating pumps for maintaining a constant flow rate when water is supplied by the regulating valve.

The plurality of control valves may include: a first solenoid valve for controlling movement of raw water flowing into the inlet of the pre-treatment filter assembly; A second solenoid valve for regulating the movement of the purified water discharged to the outlet of the pretreatment filter assembly; A third solenoid valve for controlling the movement of the reverse washing water flowing into the backwashing inlet pipe of the filter head constituting the pre-processing filter assembly; And an electromagnetic ball valve for regulating the movement of the contaminant discharged through the discharge pipe of the filter cartridge constituting the pre-treatment filter assembly.

The plurality of flow control pumps may include a first flow control pump disposed on a path of water moving through inlet and outlet of the pre-treatment filter assembly; And a second flow rate control pump disposed on the path of the water flowing into the backwashing inlet pipe of the filter head constituting the pre-treatment filter assembly.

The reverse osmosis water purification system for filtration of high turbidity water having a reverse flushing pretreatment filter according to an embodiment of the present invention is characterized in that the first flow rate regulating pump and the second flow rate regulating pump are formed of a gear pump for preventing reverse flow, And a check valve for allowing the fluid to flow only in one direction and not to flow in the opposite direction on the path of the water flowing into the backwashing inlet pipe of the filter head constituting the filter assembly.

In addition, the pre-treatment filter assembly includes an inlet through which the raw water is received, an outlet through which the purified water is discharged, and a backwashing inlet pipe through which the backwash water is received, is formed to protrude in the circumferential direction of the cylindrical housing, Filter head; And a filter cartridge having a cartridge head coupled to a receiving space of the filter head at an upper portion thereof and a discharge tube for discharging the filtered foreign matter to the outside at a lower portion thereof.

In addition, the filter head may allow the water flowing through the backwashing inlet pipe to move through a connection pipe between the purified water pipe formed in the cartridge head and the raw water pipe.

Further, the filter cartridge may include a cartridge header formed to have a structure in which a raw water pipe is wrapped around a purified water pipe; A cylindrical outer housing coupled to the cartridge header, the cylindrical outer housing having a hollow receiving space and a downwardly directed discharge tube; An inner housing disposed to be spaced apart from the inner side of the outer housing and having a filtering filter body therein; And a flow path switching module disposed between the inside of the cartridge header and the inner housing to form a path through which the water flowing through the purified water pipe and the water flowing through the raw water pipe move through the filtering filter body can do.

The flow path switching module may include a backwash channel connector having an upper inlet communicating with a lower end of the purified water pipe and an inlet formed to protrude upward from the inner housing to an inner lower portion; A connector cap which surrounds the backwash channel connector so as to prevent water flowing through the raw water pipe from flowing into the inside and is coupled with a structure in which a lower portion surrounds an upper edge of the inner housing; An outer o-ring for a watertight structure between the outside of the connector cap and the inside of the cartridge header; And an inner o-ring for watertight structure between the inside of the backwash channel connector and the inlet of the inner housing.

In addition, the inner housing may be formed such that the filtering filter body is spaced apart from the inner upper end by a predetermined distance, and the lower portion is opened.

In addition, the filter cartridge constituting the pre-processing filter assembly may be formed of a membrane filter of a UF (Ultrafiltration) type.

The purification method of the purified water system having the reverse flushing preprocessing filter according to an embodiment of the present invention includes a purified water flow path for filtering the raw water flowing into the inlet with a filter and discharging the filtered water to an outlet, Wherein the backwash flushing passage is formed in a 4-way connection structure for discharging the backwash flushing water to the backwashing filter assembly, Maintaining the associated regulating valve in the closed state and maintaining the water treatment related regulating valve moving from the inlet to the outlet in an open state; A particulate pollutant removing step of removing physical particles of high turbidity raw water flowing through a membrane filter constituting the pretreatment filter assembly by ultrafiltration (UF) and discharging; A wash water preparing step of storing the purified water discharged through the line carbon filter, the reverse osmosis filter, and the after-carbon filter constituting the water filter section in the water storage tank; A reverse valve adjusting step of keeping the backwashing related control valve for controlling the reverse washing water and the contaminant movement of the pretreatment filter assembly in the open state and maintaining the water treatment related control valve for moving from the inlet to the outlet in a closed state; And a back washing step of washing the filtration filter body constituting the pre-treatment filter assembly using purified water stored in the water storage tank and discharging particulate pollutants to the outside.

As described above, according to the present invention, by applying a reverse flushing structure for discharging contaminants to the UF-type pretreatment filter assembly, And a reverse flushing pretreatment filter capable of protecting the rear stage filter and extending the life of the pretreatment filter, and a water purification method therefor.

Further, according to the present invention, a backwashing channel connector is separately provided inside the cartridge header of the filter cartridge constituting the pre-treatment filter assembly, so that the backwashing flow path can be directly implemented in the filter for removing contaminants.

In addition, according to the present invention, the backwashing channel connector provided inside the cartridge header constituting the pretreatment filter assembly blocks the inlet port of the backwash water from the inlet port of the raw water so that the raw water does not mix with the backwash water flowing into the head of the filter The filter body for filtration can be directly cleaned, and as a result, the backwashing efficiency is improved.

Further, according to the present invention, a cross-feeding device capable of stably supplying reverse washing water capable of washing contaminants of the pre-treatment filter according to predetermined switching conditions is implemented as a control valve and a flow rate adjusting pump, It has the effect of being able to utilize change and reduce installation cost and maintenance cost.

In addition, the present invention has an effect that the pump and the valve constituting the one-way flow path are disposed on the backwashing flow path so that the reverse washing water stored in the purified water tank and the raw water are not mixed.

In addition, the present invention has an effect that a contaminant discharge pipe is formed in a lower portion of the filter cartridge constituting the pre-treatment filter assembly so that the contaminants filtered in the pre-treatment filter are simply discharged to the outside of the filter.

In addition, since the filter cartridge constituting the pretreatment filter assembly can be realized as a membrane filter of a microfiltration type, it is possible to increase the pollutant filtering efficiency of the pretreatment filter, and consequently to improve the quality of the purified water stored in the purified water tank It is effective.

1 is a view showing a water purifier in which a plurality of water filters are installed according to the related art.
FIG. 2 is a system configuration diagram schematically showing the overall configuration of a water purification filtration system having a reverse flushing preprocessing filter according to an embodiment of the present invention. Referring to FIG.
FIGS. 3 to 4 are views showing a four-way flow path constituting the purified water passage and the backwash water passage of the pretreatment filter assembly constituting the water purification system according to the embodiment of the present invention.
5 is a view schematically showing a filter head constituting a pretreatment filter assembly according to an embodiment of the present invention and a backwash exclusive filter.
6 to 8 are exploded views for explaining a pre-treatment filter assembly according to an embodiment of the present invention in detail.
9 to 10 are views for explaining the purified flow path and the backwashing flow path of the pretreatment filter assembly according to the embodiment of the present invention.
11 is a flow chart illustrating an integer method according to an embodiment of the present invention.
FIG. 12 is a view for comparing changes in flow rate due to particulate matter before and after the application of the water purification system according to the embodiment of the present invention.
FIG. 13 is a view for comparing flow rate reduction times according to the quantity of reverse flushing in the water purification system according to the embodiment of the present invention.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It is to be understood that the singular " include " or "have" are to be construed as including the stated feature, number, step, operation, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a system configuration diagram schematically showing the overall configuration of a water purification system having a reverse flushing preprocessing filter according to an embodiment of the present invention, and FIGS. 3 to 4 are flowcharts of a preprocessing Way flow path constituting the purified flow path of the filter assembly and the backwash water flow path.

As shown in the drawing, the water purification system having the reverse flushing pre-filter according to the embodiment of the present invention includes a pre-treatment filter assembly 100, a water filter unit 200, a water storage tank 300, Device 400 may be provided.

More specifically, the pretreatment filter assembly 100 firstly filters the contaminants using the filter member for filtration before purifying the raw water through the water filter unit 200, and then the filter member is washed to extend the service life A purified water passage and a backwashing passage can be implemented inside.

In the embodiment of the present invention, as shown in the drawing, the purified water flowed through the filter into the raw water flowing into the inlet and discharged to the outlet, and the backwash that discharges the foreign matter filtered out by washing the filter in the reverse direction Way connection structure, and a detailed description of the pre-treatment filter assembly 100 will be provided in the following drawings.

The water filter unit 200 may be composed of multiple filters in order to sequentially purify the raw water filtered through the purified water channel of the pre-treatment filter assembly 100. In the embodiment of the present invention, 201, a reverse osmosis filter 210, and a post-carbon filter 202

As described above, in the embodiment of the present invention, the premature clogging phenomenon can be solved through the pretreatment filter assembly 100 in which the backwash channel is formed. In addition, the chlorine, trihalomethane, and organic chemicals dissolved in the fluid are adsorbed and removed through the line carbon filter 201, and the reverse osmosis filter 210 is used as a core filter of the purifier, And finally, the gas component and odor component dissolved in the fluid can be filtered through the post-carbon filter 202. [0054] FIG.

In the embodiment of the present invention, as described above, the back-flushing flow path is implemented in the pretreatment filter assembly 100 while applying the reverse osmosis-type filter having a high purified effect, so that the service life of the filter can be increased, .

Meanwhile, the water storage tank 300 may store the purified water discharged through the water filter unit 200 to supply the reverse washing water for washing the filter of the pre-treatment filter assembly.

As shown in the drawing, the crossover supply device 400 may supply the raw water and the reverse rinsing water, which flow into the pretreatment filter assembly 100 according to an embodiment of the present invention, according to predetermined switching conditions .

As described above, the water purification system provided with the reverse flushing pre-treatment filter according to the embodiment of the present invention includes the reverse washing channel through the pre-treatment filter assembly 100 and the cross supply device 400, When purified water is stored in the water storage tank 300 and the water stored in the water storage tank 300 is used as reverse washing water for a certain period of time or when a predetermined flow rate condition or pressure condition is satisfied, .

As shown in the figure, the cross supply device 400 includes a plurality of regulating valves 410 for regulating the flow direction of water supplied through the purified water flow path and the backwashing flow path, A plurality of flow rate control pumps 420 may be provided to maintain a constant flow rate when water is supplied by the flow rate regulator.

More specifically, the plurality of control valves 410 and the flow rate control pump 420 will be described below.

In the embodiment of the present invention, the plurality of control valves 410 include a first solenoid valve 411 and a second solenoid valve 412 disposed on the purified flow path, A solenoid valve 413 and an electromagnetic ball valve 414 may be provided.

That is, the first solenoid valve 411 can control the movement of the raw water flowing into the inlet 111 of the pretreatment filter assembly 100, and the second solenoid valve 412 can control the movement of the raw water flowing into the pre- The flow of the purified water discharged to the outlet 112 of the outlet 112 can be controlled.

The third solenoid valve 413 can control the movement of the reverse washing water flowing into the backwashing inlet pipe 113 of the filter head 110 constituting the pretreatment filter assembly 100, The filter 414 may control the movement of contaminants discharged through the discharge pipe 121 of the filter cartridge 120 constituting the pre-processing filter assembly 100.

In addition, in the embodiment of the present invention, the plurality of flow control pumps 420 may include a first flow control pump 421 disposed on the purified flow path, a second flow control pump 422 disposed on the backwash flow path, .

The first flow rate regulating pump 421 is disposed on the path of the water flowing through the inlet 111 and the outlet 112 of the pretreatment filter assembly 100 as described above, Can be adjusted.

The second flow rate regulating pump 422 is disposed on the path of the water flowing into the backwashing inlet pipe 113 of the filter head 110 constituting the pretreatment filter assembly 100 and is connected to the pretreatment filter assembly 100 So that the reverse washing water can be smoothly supplied to the filtration filter body.

Meanwhile, in the embodiment of the present invention, the first flow rate regulating pump 421 and the second flow rate regulating pump 422 may be formed as a gear pump for preventing back flow.

In addition, the cross supply device 400 includes a check valve 430 (not shown) for allowing the fluid to flow only in one direction and not in the opposite direction on the path of water flowing into the backwashing inlet pipe of the filter head constituting the pre- ).

In addition, in the embodiment of the present invention, the check valve 430 is also disposed in the reverse osmosis filter 210 constituting the water filter portion 200 described above, so that the flow of water exiting through the reverse osmosis filter 210 It can be prevented from flowing in the opposite direction.

FIG. 5 is a view schematically showing a filter head constituting a pretreatment filter assembly according to an embodiment of the present invention, and a backwash exclusive filter, and FIG. 6 to FIG. 8 are views showing a detail of a pretreatment filter assembly according to an embodiment of the present invention Fig.

As shown in the drawings, in the embodiment of the present invention, the pre-processing filter assembly 100 may include a filter head 110 and a filter cartridge 120.

More specifically, the filter head 110 includes an inlet 111 through which raw water is received, an outlet 12 through which purified water flows out, and a backwashing inlet pipe 113 through which backwash water is received, And a hollow accommodation space may be provided on the lower side.

The filter cartridge 120 includes a cartridge head 122 coupled to a receiving space of the filter head 110 at an upper portion thereof and a discharge tube 121 for discharging the filtered foreign matter to the outside And may be formed by a UF (Ultrafilteration) type membrane filter.

When the reverse washing is performed using the constant of the water storage tank 300, the filter head 110 can prevent the water flowing through the backwashing inlet pipe 113 from flowing through the purified water pipe (not shown) formed in the cartridge head 122 123 can be moved to the inside of the flow path switching module 130 through the connection pipe 124-1 formed between the main water pipe 123 and the raw water pipe 124. [

Meanwhile, in the embodiment of the present invention, as shown in the drawings, the filter cartridge 120 includes a cartridge header 122, an outer housing 125, an inner housing 126, a filtering filter body 127, And a channel switching module 130.

More specifically, the cartridge header 122 may have a structure in which a raw water pipe 124 surrounds a purified water pipe 123, and when the filter head 110 is combined with the filter head 110, The raw water may be introduced into the purified water pipe 124 and the water passing through the filtering water filter may be purified by the purified water pipe 123. The connection pipe 124- 1, the reverse washing water flows through the passage switching module 130, and then the filtering filter body 127 is washed.

Here, the outer housing 125 may be formed in a cylindrical shape, which is coupled with a lower portion of the cartridge header 122 and has a hollow accommodation space and has a discharge pipe 121 formed on the lower side, as shown in the figure.

In addition, the inner housing 126 may be disposed on the inner side of the outer housing 125 and may include a filtering filter body 127 therein.

Meanwhile, in the embodiment of the present invention, the inner housing 126 may be formed such that the filtering filter body 127 is disposed at a predetermined distance from the inner upper end and the lower portion is opened, and an anthracite (or activated carbon) The filler of the present invention can be used to primarily remove a large suspended matter (or chemical substance) having a sharp shape introduced from the outside.

The channel switching module 130 constituting the filter cartridge 120 is disposed between the inner side of the cartridge header 122 and the inner housing 126 and includes water flowing through the purified water pipe 123, A path through which the water flowing through the raw water pipe 124 flows through the filtering filter body 127 can be formed.

The channel switching module 130 may include a backwash channel connector 131, a connector cap 132, an external O-ring 133, and an internal O-ring 134.

That is, the backwash channel connector 131 has an inlet 126-1 connected to the lower end of the purified water pipe 123 and having an upper inlet protruded upward from the inner housing 126, So that the diameter of the outer periphery increases from the upper part to the lower part.

In addition, the connector cap 132 has a stepped structure in a circumferential shape corresponding to the backwash channel connector 131 so as to prevent water flowing through the water pipe 124 from flowing into the connector cap 132, The inner housing 126 may be coupled with and sealed by a structure surrounding the upper edge of the inner housing 126.

The outer O-ring 133 forms a watertight structure between the outer side of the connector cap 132 and the inner side of the cartridge head 122 and the inner O- Tight structure between the inside of the inner housing 126 and the inlet 126-1 of the inner housing 126 can be formed.

9 to 10 are views for explaining the purified flow path and the backwashing flow path of the pretreatment filter assembly according to the embodiment of the present invention.

9, when the raw water flows through the inlet 111 of the filter head 110, the filter cartridge 120 is rotated in the direction And can move into the interior of the outer housing 125 through the raw water pipe 124 of the constituent cartridge header 122.

The raw water moved to the outer housing 125 through the raw water pipe 124 flows into the outer side of the inner housing 126 and the inner side of the outer housing 1250 by the flow path switching module 130 constituting the filter cartridge 120 And then passes through the filtration filter body 127 disposed inside the inner housing 126 to filter out foreign matter, and the purified water is filtered through the filtration filter body 127 disposed inside the inner housing 126, Can be moved to the purified water pipe 123 of the filter cartridge 120 through the inlet 126-1 of the backwash channel connector 131 and the inner housing 126 and discharged to the outlet 112 of the filter head 110 .

10, in the embodiment of the present invention, the backwash water flows through the backwash inlet pipe 113 of the filter head 110, Cleaning channel connector 131 through the connection pipe 124-1 between the purified water pipe 123 of the cartridge header 122 constituting the filter cartridge 120 and the raw water pipe 124. [

At this time, the backwash water is moved to the inlet 126-1 of the inner housing through the backwash channel connector 131. After passing through the filtering filter body 127 disposed inside the inner housing 126, The foreign matter may be cleaned and discharged to the outside of the filter through the discharge pipe 121 of the outer housing 125.

FIG. 11 is a flowchart illustrating a water purification method by a water purification system according to an embodiment of the present invention, with reference to the purified water flow paths and the backwashing flow paths of FIGS.

As shown in the drawing, the water purification method according to an embodiment of the present invention includes: a purified water flow path for filtering raw water flowing into an inlet through a filter and discharging the purified water to an outlet; And a pretreatment filter assembly that forms a backwash channel in a 4-way connection structure, thereby purifying the raw water.

More specifically, first, the backwashing-related control valve for controlling the backwash water and contaminant movement of the pre-treatment filter assembly is maintained in a closed state and the water treatment related control valve for moving from the inlet to the outlet is maintained in the open state And perform a forward valve adjustment step (S10).

Next, the particulate pollutant removal step (S20) for removing the physical particles of the raw water flowing through the membrane filter constituting the pre-treatment filter assembly by ultrafiltration (UF) and discharging may be performed.

Next, a wash water preparation step (S30) for storing the purified water discharged through the line carbon filter, the reverse osmosis filter, and the post-carbon filter constituting the water filter unit may be performed in the water storage tank.

Next, an inverse valve adjustment step of keeping the backwashing-related control valve for controlling the reverse washing water and the contaminant movement of the pretreatment filter assembly in the open state and for maintaining the water treatment related control valve for moving from the inlet to the outlet in a closed state (S40).

Next, a backwashing step (S50) of washing the filtering filter body constituting the pretreatment filter assembly using the purified water stored in the water storage tank and discharging particulate pollutants to the outside can be performed. When the operation is completed, the operation can be performed again from the above-described forward valve adjustment step (S10).

FIG. 12 is a view for comparing changes in flow rate due to particulate matter before and after the application of the water purification system according to the embodiment of the present invention.

As shown in the drawing, when the water purification system according to the embodiment of the present invention is applied, it can be seen that the purified water amount of the raw water greatly increases before application, and consequently, the early clogging phenomenon in which the flow rate is reduced by 50% Able to know.

FIG. 13 is a view for comparing flow rate reduction times according to the quantity of reverse flushing in the water purification system according to the embodiment of the present invention.

As shown in the figure, when the flow rate is reduced by 50% using the water purification system according to the embodiment of the present invention, the reverse flushing of 1 liter and 2 liters is performed. When the reverse flushing capacity is set to 1 liter It can be seen that the flow rate is recovered by 90% or more.

In addition, when the reverse flushing capacity is set to 1 liter and 2 liters, it can be seen that the difference in the flow rate reduction time is about 10 to 30%, which can be caused by the difference in the residual amount of particulate matter in the membrane filter.

In addition, in the case of the contaminated water used in the embodiment of the present invention, it can be seen that 50% flow reduction occurs when the raw water of about 200 liters is purified, assuming that one household consumes 20 liters of water per day It can be seen that a reverse flushing cycle of about once a week is necessary.

As described above, according to the present invention, a reverse flushing structure for discharging contaminants to the UF-type pretreatment filter assembly is applied to realize a flow path switching structure of the purified water flow path and the backwashing flow path, And a reverse flushing pre-treatment filter that protects the flushing filter and extends the lifetime of the pre-treatment filter.

Further, according to the present invention, a backwashing channel connector is separately provided inside the cartridge header of the filter cartridge constituting the pre-treatment filter assembly, so that the backwashing flow path can be directly implemented in the filter for removing contaminants.

In addition, according to the present invention, the backwashing channel connector provided inside the cartridge header constituting the pretreatment filter assembly blocks the inlet port of the backwash water from the inlet port of the raw water so that the raw water does not mix with the backwash water flowing into the head of the filter The filter body for filtration can be directly cleaned, and as a result, the backwashing efficiency is improved.

In addition, the present invention can improve the purification effect by implementing the reverse osmosis filter method in the water filter portion composed of multiple filters.

Further, according to the present invention, a cross-feeding device capable of stably supplying reverse washing water capable of washing contaminants of the pre-treatment filter according to predetermined switching conditions is implemented as a control valve and a flow rate adjusting pump, It has the effect of being able to utilize change and reduce installation cost and maintenance cost.

In addition, the present invention has an effect that the pump and the valve constituting the one-way flow path are disposed on the backwashing flow path so that the reverse washing water stored in the purified water tank and the raw water are not mixed.

In addition, the present invention has an effect that a contaminant discharge pipe is formed in a lower portion of the filter cartridge constituting the pre-treatment filter assembly so that the contaminants filtered in the pre-treatment filter are simply discharged to the outside of the filter.

In addition, since the filter cartridge constituting the pretreatment filter assembly can be realized as a membrane filter of a microfiltration type, it is possible to increase the pollutant filtering efficiency of the pretreatment filter, and consequently to improve the quality of the purified water stored in the purified water tank It is effective.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is within the scope of the present invention that component changes to such an extent that they can be coped evenly within a range that does not deviate from the scope of the present invention.

100: Pretreatment filter assembly
110: Filter head
111: Inlet
112: Outlet
113: Backwash inlet pipe
120: Filter cartridge
121: discharge pipe
122: cartridge head
123: Water tube
124: raw water pipe
124-1: Connector
125: outer housing
126: inner housing
126-1: Inlet
127: filter body for filtration
130: Euro conversion module
131: Back flushing Euro connector
132: Connector cap
133: External O-ring
134: Internal O-ring
200: Water filter section
210: reverse osmosis filter
300: Reservoir tank
400: Cross Feeder
410 (411, 412, 413): regulating valve
411: First solenoid valve
412: Second solenoid valve
413: Third solenoid valve
414: Electronic ball valve
420 (421, 422): Flow control pump
421: First flow regulating pump
422: second flow rate control pump
430: Check valve

Claims (12)

A water purification system for purifying raw water, comprising:
A pretreatment filter assembly for forming a purified water flow path for filtering the raw water flowing into the inlet through a filter and discharging the purified water to an outlet, and a backwashing flow path for washing the filter in a reverse direction to discharge the filtered foreign matter to the outside;
A water filter unit comprising a plurality of filters for sequentially purifying raw water filtered through a purified water passage of the pre-treatment filter assembly;
A water storage tank for storing purified water discharged through the water filter unit and supplying reverse washing water for washing the filter of the pretreatment filter assembly; And
And a cross supply device for supplying raw water flowing into the pre-treatment filter assembly and reverse washing water in accordance with preset switching conditions,
The pretreatment filter assembly comprises:
An inlet through which the raw water is received, an outlet through which the purified water flows, and a backwash inlet pipe through which the backwash water is received, the filter head being formed to protrude in the circumferential direction of the cylindrical housing and having a hollow accommodation space downwardly; And
And a filter cartridge having a cartridge head coupled to a receiving space of the filter head at an upper portion thereof and a discharge tube for discharging the filtered foreign matter to the outside,
The filter cartridge includes:
A cartridge header formed to have a structure in which a raw water pipe surrounds a purified water pipe;
A cylindrical outer housing coupled to the cartridge header, the cylindrical outer housing having a hollow receiving space and a downwardly directed discharge tube;
An inner housing disposed to be spaced apart from the inner side of the outer housing and having a filtering filter body therein; And
And a flow path switching module disposed between the inside of the cartridge header and the inner housing to form a path through which the water flowing through the purified water pipe and the water flowing through the raw water pipe move through the filtering filter body Gt; a < RTI ID = 0.0 > reverse flushing < / RTI >
The apparatus according to claim 1,
A plurality of regulating valves for regulating a flow direction of water supplied through the purified water flow path and the backwashing flow path; And
And a plurality of flow rate control pumps for maintaining a constant flow rate when water is supplied by the control valve.
The control valve according to claim 2,
A first solenoid valve for regulating the movement of the raw water flowing into the inlet of the pretreatment filter assembly;
A second solenoid valve for regulating the movement of the purified water discharged to the outlet of the pretreatment filter assembly;
A third solenoid valve for controlling the movement of the reverse washing water flowing into the backwashing inlet pipe of the filter head constituting the pre-processing filter assembly; And
And an electronic ball valve for regulating the movement of contaminants discharged through a discharge pipe of the filter cartridge constituting the pretreatment filter assembly.
3. The apparatus of claim 2, wherein the plurality of flow-
A first flow regulation pump disposed on a path of water moving through an inlet and an outlet of the pre-treatment filter assembly; And
And a second flow regulation pump disposed on a path of water flowing into the backwashing inlet pipe of the filter head constituting the pre-treatment filter assembly.
5. The method of claim 4,
The first flow rate control pump and the second flow rate control pump are formed of a gear pump for preventing reverse flow,
Further comprising a check valve for allowing the fluid to flow only in one direction and not to flow in the opposite direction on the path of the water flowing into the backwashing inlet pipe of the filter head constituting the pre-treatment filter assembly Water purification system with filter
delete The filter according to claim 1,
Wherein the water flowing through the backwashing inlet pipe moves through a connection hole of a partition wall formed between a purified water pipe formed in the cartridge head and a raw water pipe,
delete The system according to claim 1,
A backwashing channel connector having an upper inlet communicated with a lower end of the purified water pipe and an inlet formed to protrude upward from the inner housing to an inner lower portion;
A connector cap which surrounds the backwash channel connector so as to prevent water flowing through the raw water pipe from flowing into the inside and is coupled with a structure in which a lower portion surrounds an upper edge of the inner housing;
An outer o-ring for a watertight structure between the outside of the connector cap and the inside of the cartridge header; And
And an internal o-ring for watertight structure between the inside of the backwash channel connector and the inlet of the internal housing.
10. The apparatus of claim 9, wherein the inner housing comprises:
Wherein the filtration filter body is disposed at a predetermined distance from an inner upper end of the filtration filter body so that a lower portion thereof is opened.
The method according to claim 1,
The filter cartridge constituting the pretreatment filter assembly includes:
Characterized in that the membrane filter is formed of a membrane filter of UF (Ultrafiltration) type.
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