KR101774866B1 - The system for prevention of algae inflow to purification plant and the method using it - Google Patents

Abstract

The present invention relates to a device for removing, at a water intake step, various foreign substances, such as green tide and sludge flowing into a water purification plant from a water supply source of a lake and a river so as to reduce costs and improve water purification efficiency. The present invention includes: a treatment water tank allowing water supplied from an introduction pump to flow along a plurality of partitions dividing the compartments, and provided with a spray nozzle for floating precipitated foreign substances; a conveyor belt positioned at a distal end of the treatment water tank and collecting the foreign substances agglomerated; a filter positioned after the conveyor belt and further removing minute foreign substances; and a drainage pump for supplying the treated water to a water intake plant.

Description

TECHNICAL FIELD The present invention relates to a system for preventing inflow of a water purification plant and a method for preventing inflow of a water purification plant using the same,

The present invention relates to a system for preventing inflow of a water purification plant to remove various foreign substances such as green tide and sludge contained in water flowing into a water purification plant from a water source at a water intake stage and a method for preventing inflow of a water purification plant algae using the same.

Non-point pollution sources scattered around the rivers, lakes, rivers, and lakes, including the sea, are unprotected, eutrophication is progressing, and global warming is occurring, resulting in a large amount of green algae. Once the green algae did not disappear, it became a serious social problem due to the massive breeding, and even the new name "Nazoratte" was born.

On the other hand, the water that we use will purify water from the water source, such as river, lake, and river, and supply it to each household or user.

However, the water source contaminated with green algae already contains a large amount of toxic substances such as microcystisin and anatoxin, which are algae, and odor causing substances such as geosmin. Also, people who see it feel aesthetically uncomfortable and feel uneasy about people who come across various media such as newspapers and news.

Therefore, a pretreatment process is carried out in order to remove various foreign substances from the water source flowing into the water treatment plant in advance. Flocculants that float foreign matter by using a pressurized floating device and form flocs that can easily remove green algae and foreign matter, and various chemical agents such as chlorine are used.

The green algae and the foreign matter using the chemical are aggregated and filtered by the filter paper of the filter paper. As the amount of the green algae is large in the raw water, the filter paper for filtering the filter paper is clogged early. Frequently backwashing is performed to clean the clogged filter net, and a lot of energy is consumed through this process.

Many devices and systems have been proposed for removing foreign matter of raw water flowing into a water treatment plant in advance.

For example, Korean Patent Registration No. 10-1095298 (registered on Dec. 12, 2011) relates to a water treatment apparatus using flotation separation, which comprises a flotation treatment using flotation, Device.

As another example, Korean Patent Registration No. 10-0993009 (registered on November 22, 2010) relates to a method for rapidly removing algae, suspended matter and nutrients from the surface of water by the potentiometric method, To a method for continuously and simultaneously removing phosphoric acid causing eutrophication while rapidly removing suspended substances in algae and wastewater on the surface of water.

As a final example, Korean Patent Registration No. 10-1371405 (registered on Apr. 03, 2013) describes a method for collecting algae, and is a method for collecting algae generated in waters such as rivers, lakes, And more particularly, to a method for improving algal collection efficiency by floating the algae on the surface of water using the photosynthetic characteristics of algae.

Korean Registered Patent No. 10-1095298 (Registration date: December 12, 2011) Korean Registered Patent No. 10-0993009 (registered on Nov. 2, 2010) Korean Registered Patent No. 10-1371405 (Registration date: Mar. 03, 2013)

An object of the present invention is to provide an apparatus that can be installed in the vicinity of a water intake and can be treated in the water intake step regardless of the existing water purification process.

Further, the present invention aims to solve the water disturbance caused by the greenhouse and the sludge.

The present invention also provides a device for treating greenhouse and sludge to be removed as needed.

To achieve the above object, according to the present invention, there is provided a system for preventing inflow of a water purification plant bird, comprising: an inflow pump for supplying water from a water source; A treatment water tank provided with a spray nozzle for allowing the water supplied from the inflow pump to flow along a plurality of partitions dividing the compartments and float the precipitated foreign matter; A conveyor belt located at a distal end portion of the treatment water tank and collecting foreign matter agglomerated; A filter disposed downstream of the conveyor belt to further remove minute foreign matter; A drain pump for supplying treated water to the water intake; .

Preferably, in the present invention, the water treatment apparatus further includes a plate-like water film which is located apart from the ground in the vicinity of the inflow of the water in the treated water tank and keeps the water held for a predetermined time.

Preferably, in the present invention, at least one of the injection nozzles is located in each of the sections of the treatment water tank to allow water to flow.

Preferably, in the present invention, a plurality of the injection nozzles are located in the height direction of the treatment water tank.

Preferably, in the present invention, a plurality of grooves are formed on the conveyor belt for collecting the foreign substances which have agglomerated in the treatment water tank, thereby facilitating the removal of moisture.

Preferably, in the present invention, a cleaning pump is further provided for backwashing located vertically to one surface of the filter on which the foreign matter is adsorbed.

The pretreatment method according to the present invention is a method for pretreatment of a water purification plant through which various chemicals such as coagulant are added to the water intake and then sent to the treatment water tank through an inflow pump, The foreign matter agglomerated with each other along the partition wall is collected by the conveyor belt located at the end of the treatment tank, and the drain water pump further sends the water filtered by the filter to the water intake pump with fine foreign matters contained in the water passing through the conveyor belt .

Preferably, in the present invention, the foreign matter closing the filter is dropped to the pressure of the washing pump drain water to smooth the flow of water.

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The system for preventing inflow of a water purification plant algae according to the present invention and the method for preventing inflow of a water purification plant using the same are effective for removing various foreign substances by a simple process in a treatment tank.
Further, the present invention has an effect of increasing the water purification efficiency by removing most of the greenhouse and the sludge which are foreign substances which are aggregated in the treated water tank.

The present invention also has the effect of reducing chemicals and power consumption for increasing water purification efficiency in a water purification plant.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a system for preventing inflow of a water purification plant bird according to the present invention;
FIG. 2 is a perspective view of the treatment tank in the system for preventing inflow of a water purification plant bird according to the present invention,
Fig. 3 is a plan view of Fig. 2,
Fig. 4 is a front view of the water film,
Figure 5 is a front view of the conveyor,
6 is a front view of the filter and the cleaning pump.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
1 is a plan view of a system for preventing inflow of a water purification plant bird according to the present invention.
Before describing the present invention, the operation of the system for preventing inflow of a water purification plant algae according to the present invention will be briefly described as follows.

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Warming causes eutrophication of rivers, lakes, rivers and lakes, which are water sources. Especially, in summer, a lot of green algae are generated. In order to purify the water obtained from the water source in the water purification plant, a considerable amount of cost and time are consumed. Therefore, in order to save such a problem, in the water intake step before the water source is directly inputted from the water source to the water purification plant, the sludge including the greenhouse is firstly filtered and filtered.
As shown in FIG. 1, the system for preventing inflow of a water purification plant according to the present invention includes a treatment water tank 110, an inflow pump 120, a water tank 130, a water flow accelerating unit 140, (150), and a secondary foreign substance removing unit (160).
The treatment water tank 110 includes a concrete enclosure 111 in which an inlet 113 and an outlet 114 for water flowing from a water source are formed as an upper opened hexahedron as shown in FIG. A plurality of vertical walls provided parallel to each other at a predetermined interval between the inlet 113 and the outlet 114 and one end of each of the vertical walls being integrally connected to the inner wall of the enclosure 111, 111), and a plurality of vertical walls are arranged in a vertical direction between the vertical walls opposite to each other so that a flow direction diversion direction is reversed, thereby forming a zigzag-like flow path in the housing 111 And a partition wall 112 installed so that the width of the flow direction switching section closest to the outlet 114 is maximized.
1, the inflow pump 120 is installed to introduce water from a water source into the process water tank 110 through an inlet 113. [
As shown in FIGS. 1, 2 and 4, the water tray 130 is a plate that cuts off the upper portion of the flow path and opens the lower portion. The water tray 130 is disposed at a position spaced from the inlet 113 by a predetermined distance, (110).
As shown in FIGS. 3 and 4, the water flow accelerating unit 140 is disposed in parallel with the three nozzles and disposed in the direction of the flow of water in the flow channel, and is installed between the upper portion of the flow channel and the upper and lower portions of the flow channel The first spray nozzle 141 and the second spray nozzle 142 are disposed adjacent to the bottom of the flow path and the second spray nozzle 142 is disposed adjacent to the first spray nozzle 141 and the second spray nozzle 142, And an underwater pump 143 for injecting water in the flow direction of the water flowing through the first and second injection nozzles 142.
The first or second injection nozzle 142 is installed between the upper part of the water film 130 and the water flow direction switching section and between the partition walls 112 to accelerate the water flow which is slowed down to keep the flow rate of the water flow constant, And the first or second injection nozzle installed in the water flow direction switching section is provided to accelerate the flow of the water flow which is diverted from the opposite edge of the membrane edge in the water flow direction switching section, So as to increase the flow velocity on the side where the direction is switched in the water flow direction switching section and to induce the water flow direction change to approach the dead wall by lowering the pressure.
1 and 5, the primary foreign matter removing unit 150 is partially installed below the water surface in a flow path formed between the partition wall 112 adjacent to the outlet 114 and the inner wall of the housing 111 A separation plate 152 disposed at a distance from the surface of the roller 151 and one end connected to the separation plate 152 and the other end projecting to the outside of the treatment water tank 110, And a belt 1531 having a stainless steel network structure in which a plurality of holes are formed in the conveyor 153. The conveyor 153 is installed at the lower end of the conveyor 153, The agglomerated foreign matter floated on the water surface is moved to the surface of the roller 151 to be rotated and then separated from the surface of the roller 151 by the separating plate 152 and transferred to the conveyor 153, Stainless steel mesh belt (15 31, the water contained in the foreign matter falls to the lower treatment water tank 110 and is exposed to the sunlight at the same time as the water is drained, so that the foreign matter which is dried during transportation to the conveyor 153 is collected in the collection box .
The secondary foreign substance removing unit 160 includes a filter 161 installed to block the flow path between the roller 151 and the outlet 114, a stand 162 detachably fixing the filter 161, And a cleaning pump 164 for cleaning the surface of the filter 161 by spraying water flowing along the flow path to the cleaning nozzle 163, The foreign matter remaining in the water that has passed through the primary foreign matter removing unit 150 is filtered by the filter 161 and discharged to the outlet 114 and the foreign matter remaining on the surface of the filter 161 is discharged to the cleaning nozzle 163 ), The filtration of the remaining foreign matter is performed in real time.
The drain pump 170 discharges the water that has passed through the second foreign substance removing unit 160 through the outlet 114 and transfers the water to the water intake.

A connection pipe 202 connected from a water supply source is supplied with water through the inflow pump chamber 200 to the treatment water tank 110. At this time, chemicals such as flocculants are injected into the water, Are coagulated in the form of sludge.

The treatment water tank 110 is composed of a box-shaped enclosure 111 and a partition wall 112 provided inside the enclosure, and a plurality of partition walls 112 arranged at equal intervals along the longitudinal direction are divided into a plurality of compartments have. Therefore, the charged water flows in a zigzag shape while the foreign matters sufficiently aggregate along the partition wall 112 of the treatment water tank 110.

The conveyor 153 located in the last section of the treatment water tank 110 and the filter 161 located after the conveyor 153 are used to filter out the foreign matter that has cohered with each other.

The water that has passed through the filter 161 is moved to the water intake pump through the water pump 300 installed at the end of the treatment water tank 110.

2 is a perspective view of the treatment water tank.

The treatment water tank 110, which is installed at the same height as the ground surface, keeps the input water as long as possible so that the greenhouse or sludge flocculates to a sufficient size and is easy to remove.

Also, the partition walls 112 provided in the treatment water tank 110 divide the inside of the treatment water tank 110 into equal sections at equal intervals so that the introduced water can be sent sequentially without being introduced into the water intake pool at a time. The partition walls 112 are provided in a direction parallel to the longitudinal direction of the processing water tank 110 and partially open at the ends of the partition walls 112 facing each other to allow water to flow in a zigzag pattern.

A water tank 130 having a plate shape is installed vertically between the inner wall and the partition wall 112 near the entrance of the treatment water tank 110 into which water is injected so that the water is not moved directly, .

In addition, the length of the partition wall 112 dividing the last section to send the water to the water intake is shorter than that of the other partition walls 112, so that the sludge agglomerates to move quickly to the last section.

3, the partition wall 112 is thinner than the outer wall of the housing 111. This reduces the thickness of the partition wall 112, thereby accommodating a larger amount of water in the processing water tank 110 And it is also possible to reduce the material, time and cost consumed in the production.

The number of the partition walls 112 provided in the treatment water tank 110 is set so as to allow the water to stay sufficiently to allow foreign matter such as green algae and sludge in the water to sufficiently coagulate and to be installed most efficiently in consideration of the installation cost and size of the treatment water tank 110 It will be good.

The enclosure 111 and the partition wall 112 constituting the treatment water tank 110 are made of a reinforced concrete structure and are made of any material having reasonable strength and enough strength to accommodate a large amount of water in use It may be good to do.

FIG. 3 shows a state in which water flows through a spray nozzle provided inside the treatment tank according to the present invention.

The first injection nozzle 141 and the second injection nozzle 142 connected to the underwater pump 143 by the hose are respectively located on the upper and lower surfaces of the inner wall of the treatment water tank 110 to generate water to flow water in one direction , And precipitate foreign matter.

The spray nozzles 141 and 142 (hereinafter, referred to as "first spray nozzle" and "second spray nozzle") each having a trident shape using three lakes are made of FRP material, Spray water. The submersible pump 143 may have an output of 0.6 horsepower and a larger capacity submersible pump 143 may be used depending on the size and depth of the treatment bath 110. [

As the raw water of the water source introduced into the treatment water tank 110 from the first inflow pump chamber 200 is confronted with the water film 12, the weakened water and the water-containing water gradually pass through the water film.

The first injection nozzle 141 installed at the upper end of the water tray 130 is installed in the direction of the water flow so that water does not stagnate for a long time and passes through the water tray 130.

The water flowing along the partition wall 112 comes into contact with the inner wall of the housing 111 and suddenly changes its direction to weaken the water flow and partly reverse. (141). Therefore, the water is not stagnated by the first injection nozzle 141 and flows continuously to the end of the treatment bath 110. [

On the other hand, the second injection nozzle 142 installed on the bottom surface of the treatment water tank 110 injects water toward the upper part, so that the foreign substances sinking in the water are raised to coagulate with other foreign matter. The coagulated foreign matter moves along with the water to the last compartment along the partition wall 112 and moves to the distal end of the treatment water tank 110.

The second injection nozzle 142 located on the bottom surface of the treatment water tank 110 and the first injection nozzle 141 located on the upper end of the inner wall are connected to one underwater pump 143 to artificially provide a flow of water do. On the other hand, in the first injection nozzle 141 located at the upper end, the lengths of the nozzles are different from each other. In order to keep the flow of the water suddenly changed in direction constant, the nozzle located adjacent to the partition wall 112 has the longest length .

Referring to FIG. 4, there is shown a cross-sectional view of a treated water tank complete with various facilities.

The first spray nozzle 141, the second spray nozzle 142, the conveyor 153, and the filter 161 are disposed in the processing bath 110 in a state in which the water tray 130, the first spray nozzle 141, the second spray nozzle 142, Respectively.

There is provided a water damper 130 for temporarily stopping raw water flowing into a place where raw water flows into one side of the treatment water tank 110 without flowing directly along the barrier ribs 112. The water dam 130 closes the upper part of the treatment water tank 110 and is positioned apart from the floor so that a part of the lower end thereof is opened so that the water is temporarily stagnated and flows into the space at the lower end of the water dam 130.

The water film 130 prevents the space between the inner wall of the housing 111 and the partition wall 112 from gaps and is made of a stainless steel plate. It may be manufactured by integrally connecting the partition wall 112 and the inner wall of the housing 111 with a reinforced concrete structure as well as a stainless steel material and any structure capable of limiting the flow of water by various materials may be used.

The first spray nozzle 141 for controlling the flow of water and the residence time is located at the upper end of the water tray 130. When a large amount of water is injected, the intensity of the water generated in the first spray nozzle 141 is actuated Allow water to flow quickly.
The first injection nozzle 141 and the second injection nozzle 142 are installed at different heights to perform different roles. The first injection nozzle 141 located at the upper end of the inner wall of the treatment water tank 110 artificially generates a flow of water to flow the water in one direction. In addition, the second injection nozzle 142 located at the bottom of the treatment water tank floats the foreign matter such as greenhouse and sludge sinking below the water surface.

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On the other hand, when the water flowing along the partition wall 112 reaches the last section of the treatment water tank 110, the agglomerated foreign matter is filtered by the conveyor 153 constituting the primary foreign substance removing unit 150, 153 are filtered once more by the filter 161 constituting the secondary foreign matter removing unit 160. [ Therefore, the water that has passed through the treatment water tank 110 flows into the water intake line in a state where the foreign matter of the organic sludge is removed.

5 is a view of the primary foreign matter removing unit 150. FIG.

A conveyor 153 located between the last partition wall 112 of the end section of the treatment water tank 110 and the outer wall carries foreign matter floating on the water surface and removes it by a collection box.

The conveyor 153 is provided at its front end with a separating plate 152 for separating foreign matter adhered to the roller 151 from the upper end of the roller 151 and the roller 151 in direct contact with the water surface .

The foreign substances adhering to the rotating roller 151 are dropped off by the separating plate 152 and gathered in a collection box (not shown) installed outside the process water tank 110 along the conveyor 153 and discarded. At this time, an inclined surface toward the treatment water tank 110 is provided in the lower part of the collection box so that the water flowing out from the foreign substances collected in the collection box can be returned to the treatment water tank.

Also, a plurality of holes are formed in the belt 1531 that is provided on the conveyor 153 for conveying the foreign matter, and the water is drained to the water treatment tank 110 flowing out from the foreign matter. The belt 1531 is mainly used as a strong and easy-to-clean stainless steel mesh, and it may be possible to use a rubber or other metal belt depending on the situation.
The water having passed through the primary foreign matter removing unit 150 including the conveyor 153 passes through the secondary foreign matter removing unit 160 provided with the filter 161.
6, the secondary foreign substance removing unit 160 includes a filter 161, a stand 162 for detachably fixing the filter 161, and a holder 162 for holding the filter 161 in a direction parallel to the front surface of the filter 161 And a cleaning pump 164 for cleaning the surface of the filter 161 by spraying water flowing along the flow path to the cleaning nozzle 163. [

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Since the conveyor 153 is agglomerated to remove foreign matter having a large volume or size, when water containing a lot of minute foreign matter is sent to the water intake, it takes a lot of time and cost to remove minute foreign matter. Accordingly, the water passing through the conveyor 153 is directly passed through the filter 161 to further filter out fine foreign matter, thereby minimizing foreign matter.
A stand 142 for inserting and fixing a plurality of filters 161 is disposed between the inner wall of the housing 111 and the partition wall 112 when the filter 161 installed in the secondary foreign substance removing unit 160 is viewed, So that the filter 161 whose lifetime has expired can be easily replaced.

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Water that has passed through the filter 161 that filters the fine foreign matter is moved to the water intake port and the water moving to the water intake port is subjected to the water treatment process without any additional chemical treatment at the water intake point with the pure water from which the foreign matter is removed.

If the filter 161 is used for a long period of time, it is necessary to clean the surface of the filter 161 periodically.

Since the worker enters the inside of the water treatment tank 110 every time and the process of cleaning or replacing the filter 161 is very cumbersome and the water purification operation is interrupted during the replacement, (163). This causes the cleaning pump 164 connected to the cleaning nozzle 163 to operate periodically or under the control of the manager to clean the filter 161 with the pressure of the drainage water.
Meanwhile, the method for preventing inflow of a water purification plant using the water purification plant inflow prevention system according to the present invention will be described briefly since it is the same as the foregoing description.
The method for preventing inflow of a water purification plant using a water purification plant algae inflow prevention system according to the present invention includes a first step of administering a flocculant to water flowing into a treatment water tank 110 through an inlet 113, 130) to reduce the speed of the water, and then water flows into the zig-zag along the flow path formed by dividing the water into the barrier ribs 112, so that the water introduced into the treatment water tank 110 flows into the primary foreign matter removing unit 150 The second step of securing a time for agglomeration of the green tanks contained in the water by the flocculation accelerating part 140 by using the water flow accelerating part 140 installed in each section of the flow path formed by the partitions 112, A third step of accelerating the flow of water to keep the flow rate of the flowing water constant and preventing the flocculation of the foreign matter agglomerated by the flocculant, A fourth step of performing water removal of the foreign matter agglomerated with the flocculant and drying process of exposure to sunlight by passing the water reaching the furnace to the first foreign material removing unit 150, The foreign matter accumulated on the surface of the filter 161 constituting the secondary foreign substance removing unit 160 is filtered by the filter 163 through the cleaning nozzle 163, A fifth step of removing water by spraying water in a direction parallel to the surface of the second foreign matter removing unit 160 and a sixth step of transferring the water that has passed through the second foreign matter removing unit 160 to the water intake path, And there is no temporal posterior relationship between the steps.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

100: a system for preventing inflow of a water purification plant bird 110:
111: Enclosure 112:
113: inlet 114: outlet
130: Water film 140: Water flow acceleration part
141: first injection nozzle 142: second injection nozzle
143: Submersible pump 150: Primary foreign matter removal
151: roller 152: separator plate
153: Conveyor 160: Secondary foreign matter removal
161: Filter 162: Stand
163: Cleaning nozzle 164: Cleaning pump
170: Drain pump 200: Inlet pump chamber
202: connector 300: drain pump room
1531: Belt

Claims (8)

A concrete enclosure 111 in which an inlet 113 and an outlet 114 of water flowing from the water source are formed and an outlet And one end of each of the vertical walls is integrally connected to the inner wall of the enclosure 111 and the other end is spaced apart from the inner wall of the enclosure 111 by a predetermined distance, A plurality of vertical walls are provided so as to form a zigzag-shaped flow path inside the enclosure 111 by arranging the water flow direction switching sections in opposite directions between the vertical walls facing each other, (110) having a partition wall (112) installed to form the largest width;
An inflow pump 120 installed to introduce water from the water source into the process water tank 110 through the inlet 113;
A water damper 130 disposed at a position spaced apart from the inlet 113 and decelerating the water flowing into the water treatment tank 110 through the inlet 113, ;
A first injection nozzle 141 which is arranged in parallel with the three nozzles and is arranged so as to face the flow direction of water in the flow path and which is disposed between the upper part of the flow path and the lower part of the flow path, A plurality of nozzles 142 are provided for each of the first spray nozzles 141 and the second spray nozzles 142 so that water in the process water tank 110 flows through the first and second spray nozzles 142 in the flowing direction The first or second injection nozzle 142 is installed between the upper portion of the water damper 130 and the water flow direction switching portion and between the partition walls 112 to accelerate the water flow that is slowed down, The first or second injection nozzle installed in the water flow direction switching section is provided to accelerate the flowing water flow which is diverted from the opposite side edge of the dead end in the water flow direction switching section while keeping the flow velocity constant, on The flow direction of the flow direction of the flow direction of the flow direction of the flow direction of the flow direction of the flow direction of the fluid is increased, (140);
A roller 151 installed to be partially submerged below the water surface in the flow path formed between the partition wall 112 adjacent to the outlet 114 and the inner wall of the housing 111, A conveyor 153 which is adjacent to the separating plate 152 at one end and protrudes to the outside of the treatment water tank 110 and is provided so as to be upwardly inclined from one end toward the other end, The conveyor 153 is provided with a belt 1531 having a plurality of holes and having a stainless steel network structure so that the agglomerated foreign matter floating on the water surface is conveyed to the surface of the roller 151 And is separated from the surface of the roller 151 due to the separation plate 152 and is transferred to the conveyor 153 and moved along the stainless mesh belt 1531 installed on the conveyor 153. As a result, With the first foreign substance removing unit 150 that this foreign matter is transferred to the drying conveyor 153 proceeds by exposure to sunlight, and at the same time dropping the exception drained to the process tank (110) formed to be collected in the collection box;
A filter 161 installed to block the flow path between the roller 151 and the outlet 114; a stand 162 detachably fixing the filter 161; And a cleaning pump 164 for cleaning the surface of the filter 161 by spraying water flowing along the flow path to the cleaning nozzle 163 so that the primary foreign matter removing unit 150 The foreign matter remaining in the water passing through the filter 161 is filtered by the filter 161 and then discharged to the outlet 114 and the foreign matter remaining on the surface of the filter 161 is removed from the secondary foreign matter removing unit 160; And
And a drain pump for discharging the water that has passed through the secondary foreign matter removing unit (160) through the outlet (114) and transferring the water to the water intake. delete delete delete delete delete A method for preventing inflow of a water purification plant bird by using a water purification plant inflow prevention system comprising the steps of:
A first step of administering a flocculant to water flowing into the treatment water tank (110) through the inlet (113);
The water to which the coagulant is injected is stopped by the water film 130 to reduce the speed of the water, and then the water flows in a zigzag manner along the flow path formed by dividing the water into the barrier ribs 112, A second step of securing a time for the green alga contained in the water to coagulate with the flocculant by allowing the first foreign material removing unit 150 to reach the first foreign object removing unit 150 after the elapse of a predetermined time;
It is possible to accelerate the flowing water flow which is slowed down by using the water flow accelerating part 140 installed in each section of the flow path formed by the partition wall 112 so as to keep the flow rate of the water flow water at a constant level and to precipitate the foreign matter which flocculates by the flocculant (3)
The water reaching the last channel provided with the outflow port 114 of the flow path is passed through the primary foreign matter removing unit 150 to remove moisture of the foreign matter agglomerated by the flocculant, 4 steps;
The foreign matter remaining in the water that has passed through the primary foreign matter removing unit 150 is filtered by the secondary foreign substance removing unit 160 and the foreign substances accumulated on the surface of the filter 161 constituting the secondary foreign substance removing unit 160 A fifth step of removing water by spraying water in a direction parallel to the surface of the filter 161 through the cleaning nozzle 163; And
And a sixth step of transferring the water that has passed through the secondary foreign matter removing unit 160 to the water intake station,
Wherein the second step and the third step have no temporal relationship to each other. delete

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