KR100792590B1 - Filtering system - Google Patents

Abstract

A filtering system is provided to prevent a first pump from being broken down, and prevent inflow of air of into the strainer due to the suction of the first pump during the backwashing process. A filtering system(1) includes: a strainer(10) having an inflow path(A) through which contaminated water is supplied, a discharge path(B) for filtering the contaminated water that has been flown into the inflow path to discharge filtered water, a drain path(C) for discharging backwashing water comprising contaminants generated when filtering the contaminated water, a drain valve(11) for opening or closing the drain path, and a switch(12) for controlling opening and closing of the drain valve; a first pump(20) that is positioned on the discharge path and discharges the filtered water; and a second pump(30) that is positioned on the drain path and discharges the contaminants to the drain path when the drain valve is opened.

Description

Filtration System {FILTERING SYSTEM}

1 to 3 is a view of a conventional filtration system,

4 is a view of a filtration system according to a first embodiment of the present invention,

5 is a view of a filtration system according to a second embodiment of the present invention,

6 is a diagram of a filtration system according to a third embodiment of the invention.

<Description of Major Numbers in Drawing>

10: strainer 11: drain valve

12 switch 13 pressure gauge

20: first pump 30: second pump

40: expansion unit 50: feedback valve

The present invention relates to a filtration system, and more particularly, since the first pump sucks / discharges filtered water filtered by the strainer, preventing the failure of the first pump, and installing a second pump in the drain path of the strainer during the backwashing process. A filtration system for preventing air from entering a strainer by suction of a first pump.

In general, a water filter (STRAINER, strainer) is a device for filtering organic suspended matter that can be introduced and generated in various equipment systems using a mesh, and is widely used for water purification of agricultural and industrial water. In general, factories are mainly equipped with a water filter for filtering contaminated cooling water and the like to filter a large amount of contaminated water.

In particular, as shown in FIG. 1, the automatic backwash type automatic strainer 100 of the water filter is referred to as a `` strainer '' 100 through a filtration process and a drain valve 110 for filtering contaminated water. It is widely used because the backwashing process, which discharges backwashing water containing contaminants generated when filtering contaminated water, can be simultaneously performed to the outside of the strainer.

Here, when the pressure difference measured by the pressure gauge 120a located in the path through which the contaminated water is introduced and the pressure gauge 120b located in the path through which the filtered water is discharged increases by more than a certain level, it is determined that the pollutant is full in the strainer 100. Thus, the switch 130 opens the drain valve 110. Thus, the backwash water mixed with a part of the contaminated water is discharged to the outside of the strainer 100.

Here, as shown in FIG. 1, the pump 150 is installed together with the strainer 100 as equipment for introducing contaminated water into the strainer 100 and discharging the filtered water filtered by the strainer 100. to be. However, the pump 150 had to be installed in a path through which the contaminated water flows into the strainer 100 (hereinafter referred to as 'inflow path A').

The reason for this is that when the pump 150 is located in a path through which the filtered water filtered by the strainer 100 is discharged (hereinafter, referred to as 'discharge path B'), suction force of the pump 150 is generated during the backwashing process. . This is because outside air may be introduced into the strainer 100 through a path through which backwash water containing contaminants is discharged (hereinafter, referred to as a 'drain path C'). This is because the suction force of the pump 150 acts in a direction opposite to the direction of reverse wash flow discharged through the drain path C.

Accordingly, when outside air flowed into the strainer 100 during the filtration process, the filtration process had to be stopped. Therefore, when performing the backwashing step of the filtration process by placing the pump 150 in the inflow path (A), it was common to prevent the outside air flows into the strainer 100 by the pump 150.

However, when the pump 150 is located in the inflow path A, since the contaminated water is supplied to the strainer 150 via the pump 150, the impeller of the pump 150 is contaminated by the contaminants contained in the contaminated water. Problems such as damage occurred.

Thus, as shown in Figure 2, the Y-type strainer 200 has been devised a way to install a path in which the contaminated water flows into the pump 150. Here, the Y-type strainer 200 is provided to filter the contaminants of the size that can break the pump 150 among the contaminants of the contaminated water. However, when the Y-type strainer 200 is filled with contaminants therein, it is inconvenient to perform the backwashing process manually while the filtration process is stopped. Here, the manual backwashing process means that a person removes contaminants in the Y-type strainer 200.

Accordingly, as shown in FIG. 3, two buckets (BUCKET) strainers 300 are installed in parallel in a path into which the contaminated water flows into the pump 150, thereby causing a size of the pump 150 to fail. A system for filtering large foreign objects has been devised. In this system, when one of the two bucket-type strainers 300 performs the filtration process, the other was a backwash process. However, there have been problems in that two bucket type strainers 300 should be provided and still have to perform a manual backwashing process.

The present invention has been made in order to solve the above problems, the first pump sucks / discharges the filtered water filtered by the strainer to prevent the failure of the first pump, backwashing by installing a second pump in the drain path of the strainer It is an object of the present invention to provide a filtration system which prevents air from entering the strainer by suction of the first pump during the process.

The above object is an inlet path through which contaminated water is supplied according to the present invention, a discharge path for filtration of the contaminated water introduced into the inlet path to discharge filtered water, and a backwash water including contaminants generated when the contaminated water is filtered. A strainer having a drain path for discharging water, a drain valve for opening and closing the drain path, and a switch for controlling opening and closing of the drain valve; A first pump positioned in the discharge path to discharge the filtrate; Located in the drain path, when the drain valve is open is achieved by a filtration system comprising a second pump for discharging the contaminants into the drain path.

Here, the inlet path is provided with an expansion unit for expanding the pipe forming the inlet path, and communicates between the discharge path and the expanded inlet path, the reverse of the amount of filtered water discharged to the first pump A feedback path for reflowing an amount corresponding to the amount of tax revenue into said expanded inflow path; A feedback valve positioned on the feedback path to open and close the feedback path and open by the switch when the drain valve is opened, and capable of supplying an amount corresponding to the amount of backwash water among the amount of filtered water; Can be.

The apparatus may further include a flow meter positioned in the discharge path and measuring a flow rate of the filtered water discharged to the discharge path, wherein the switch controls the opening and closing of the drain valve by the flow rate of the filtered water measured by the flow meter. Can be.

The apparatus may further include a pressure gauge which is positioned at each of the inflow path and the discharge path and measures the hydraulic pressure of the contaminated water flowing into the inflow path and the filtered water discharged into the discharge path, and the switch is a hydraulic pressure measured by the pressure gauge. It is possible to control the opening and closing of the drain valve by.

In addition, the switch may control the opening and closing of the drain valve at a set time interval.

Hereinafter, with reference to the accompanying drawings, an embodiment of a filtration system according to the present invention will be described in detail.

The filtration system 1 according to the first embodiment of the present invention includes a strainer 10, a first pump 20 and a second pump 30, as shown in FIG. 4.

The strainer 10 has an inflow path (A) through which contaminated water flows in, a discharge path (B) through which filtered water is filtered out, and a drain path (C) through which contaminants are generated when the contaminated water is filtered out. It includes. Here, the inside of the strainer 10 includes a configuration for filtering the contaminated water, such as a filter net (not shown), a motor (not shown) for rotating the filter net, but this is a configuration that will be apparent to those skilled in the art and will not be described in detail. .

The strainer includes a drain valve 11 positioned in the drain path C to open and close the drain path C, and a switch 12 to control the opening and closing of the drain valve 11.

Here, the switch 12 is positioned as the pressure gauge 13 in the inlet path (A) and the discharge path (B) as shown in Figure 4 so that the difference in the pressure measured by the pressure gauge 13 is increased by a certain pressure or more. In this case, it is assumed that the switch 12 opens the drain valve 11.

In addition, the switch 12 may be provided as a switch that is set to open and close the drain valve 11 when a flowmeter (not shown) is disposed in the discharge path B so that the flow rate decreases below a predetermined flow rate. This is for when the filtration system 1 according to the invention is used in a situation where a constant flow rate of filtered water must be discharged.

In addition, the switch 12 may be set to open and close the drain valve 11 at regular intervals. This is to periodically remove the contaminants accumulated in the strainer 10, to maintain a constant discharge of the filtered water.

Here, the process of filtering the contaminated water introduced through the inflow path (A) in the strainer 10 and discharging the filtered filtrate through the discharge path (B) will be referred to as a filtration process. In addition, a process in which the strainer 10 discharges the backwash water containing the pollutants generated by filtering the contaminated water to the drain path C will be referred to as a backwash process.

The first pump 20 is located in the discharge path B to discharge the filtered water filtered by the strainer 10. Here, the first pump 20 operates while the filtration process is performed.

The second pump 30 is located in the drain path C to discharge the backwash water containing the contaminants generated in the strainer 10 in which the drain valve 11 is opened to the drain path C.

Here, since the second pump 30 does not need to operate when the drain valve 11 is closed, the second pump 30 may be controlled to operate only during the backwashing process by the switch 12.

Accordingly, even when the backwashing process is performed while the suction force is applied to the inside of the strainer 10 in the direction of the discharge path B by the first pump 20 during the filtration process, the outside air is discharged by the second pump 30. The inflow into the strainer 10 through the drain path C is prevented.

That is, since the second pump 30 generates a suction force for discharging the backwash water to the drain path C during the backwashing process, the second pump 30 blocks the outside air from flowing into the strainer 10 through the drain path C. .

In addition, the suction force of the second pump 30 during the backwashing process also increases the discharge efficiency of the backwashing water.

On the other hand, with reference to Figure 5 will be described in detail the filtration system (1a) according to a second embodiment of the present invention.

Prior to the description, the description of the same configuration as in the first embodiment of the present invention will be omitted, and the same reference numerals will be used.

As shown in FIG. 5, the filtration system 1a according to the second embodiment of the present invention has an amount of backwash water discharged to the drain path C and an amount of contaminated water flowing into the inflow path A. Contaminated water (hereinafter referred to as 'extended contaminated water') with the addition of a corresponding amount of filtered water can be introduced into the inflow path (A).

That is, assuming that the amount of contaminated water flowing into the inflow path (A) is (P) and the amount of backwashed water discharged into the drain path (C) (Q), the amount of increased contaminated water is (P + Q). do.

In this configuration, the filtration system 1a according to the second embodiment of the present invention may further include an expansion unit 40, a feedback path D, and a feedback valve 50.

The expansion unit 40 is installed in the inflow path (A) to expand the portion adjacent to the strainer 10 of the pipe forming the inflow path (A).

The feedback path (D) communicates between the discharge path (B) and the inflow path, and the inflow path (A) corresponds to the amount of backwash water discharged from the drain valve (11) among the filtered water discharged to the first pump (20). ) Is provided for re-introduction to the portion expanded by the expansion unit (40).

The feedback valve 50 is located in the feedback path D to open and close the feedback path D. Here, the feedback valve 50 is controlled by the switch 12, and opens the feedback path (D) during the backwashing process. Here, the feedback valve 50 may be provided to supply an amount corresponding to the amount of backwashed water in the filtered water to the feedback path (D), but the diameter of the pipe forming the feedback path (D) is equal to the amount of backwashed water in the filtered water. Of course, it can be provided to supply a corresponding amount.

Therefore, in the backwashing process, the feedback valve 50 is opened and the amount corresponding to the amount of backwash water discharged from the drain valve 11 among the filtered water discharged to the discharge path B is the inflow path through the feedback path D. (A) flows into the portion expanded by the expansion unit (40).

Therefore, the pipe forming the inflow path (A) is exposed to the suction force of the first pump 20 and the second pump (30) for a long time, thereby preventing the excessive flow to the pipe forming the inflow path (A) and inflow It is provided to extend the service life of the pipe forming the path.

That is, it is assumed that the amount of contaminated water flowing into the inflow path A is Q and the amount of backwash water discharged through the drain path C is P. Here, when the backwashing step of the filtration process, the amount of filtered water discharged from the strainer 10 to the discharge path (B) is (Q-P).

Here, the backwashing process is a process in which both the first pump 20 and the second pump 30 operate. Therefore, if the backwashing process is performed while the first pump 20 generates the suction force to suck the amount of contaminated water by (Q) and performs the filtration process, the second pump 30 receives the backwashing water of the amount of (P). Generates suction power. Thus, the inflow path (A) receives a suction force for suctioning the increased amount of (Q + P) contaminated water by the first pump 20 and the second pump 30.

Here, in the state where the strainer 10 is previously installed to filter the water, the pipe forming the inflow path A according to the present invention is provided as a pipe having a supply capacity of Q, which is the amount of contaminated water. Therefore, if the suction force for sucking the positive water by (Q + P) for a long time by the first pump 20 and the second pump 30 acts for a long time, the pipe forming the inflow path (A) may be excessive. .

Accordingly, as shown in FIG. 5, the filtration system 1a according to the second exemplary embodiment of the present invention installs an expansion unit 40 capable of supplying the increased contaminant water to the inflow path A to install the inflow path A. It is to expand and to further install a feedback path (D) is provided with a feedback valve 50 for introducing the same amount of backwash water out of the filtered water discharged into the discharge path (B) to the inflow path (A).

Therefore, the feedback valve 50 is opened during the backwashing process, and when the filtered water corresponding to the amount (P) of the filtered water discharged into the discharge path B is re-introduced into the inflow path A, the filtered water supplied to the strainer 10 is supplied. Becomes the (Q + P) positive filter. Thus, the increased filtration water satisfies the required amount of suction by the first pump 20 and the second pump 30, so that the pipe forming the inflow path (A) is a long time the first pump 20 and the second pump ( Even if exposed to the suction power of 30) will not come unreasonable.

Hereinafter, the filtration system 1b according to the third embodiment of the present invention will be described with reference to FIG. 6.

Prior to the description, the description of the same configuration as in the first embodiment of the present invention will be omitted, and the same reference numerals will be used.

As shown in FIG. 6, the filtration system 1b according to the third embodiment of the present invention has a first strainer 10a having a filtration capability in which the strainer 10 can prevent a failure of the first pump 20. ) And a second strainer 10b for filtration and discharge of primary filtered filtrate filtered by the first strainer 10a.

Here, the first strainer 10a filters contaminants that may break the impeller of the first pump 20 among the contaminants contained in the contaminated water flowing into the inflow path A of the first strainer 10a. Is prepared to.

In addition, the second strainer 10b receives the first filtered water first filtered by the first strainer 10a by the first pump 20, refilters it, and discharges the second filtered water.

Here, the filtration material filtered by the first strainer 10a may be relatively larger than the filtration material filtered by the second strainer 10b.

Thus, by providing a first strainer (10a) for protecting the first pump 20 and a second strainer (10b) for substantially filtration, backwashing while preventing the failure of the first pump 20 according to the present invention A filtration system 1b can be constructed to prevent the ingress of external air during the process.

On the other hand, reference numeral 60 shown in Figures 4 to 6 is a check valve 60 to prevent the back flow of contaminated water, filtered water and backwash water.

Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that the present embodiments may be modified without departing from the spirit or spirit of the invention. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents.

By the above configuration, the filtration system according to the present invention prevents the failure of the first pump because the first pump sucks / discharges the filtered water filtered by the strainer, and installs the second pump in the drain path of the strainer during the backwashing process. There is an effect of preventing air from entering the strainer by suction of the first pump.

Claims (5)

An inflow path for supplying contaminated water, a discharge path for filtering the contaminated water introduced into the inflow path to discharge filtered water, and a drain path for discharging backwash water containing contaminants generated when the contaminated water is filtered and the drain A strainer having a drain valve for opening and closing a path and a switch for controlling opening and closing of the drain valve; A first pump positioned in the discharge path to discharge the filtrate; And a second pump located at the drain path and for discharging the pollutant to the drain path when the drain valve is opened. The method of claim 1, The inflow path is provided with an expansion unit for expanding the pipe forming the inflow path, A feedback path communicating between the discharge path and the expanded inflow path and reintroducing an amount corresponding to the amount of backwash water out of the amount of filtered water discharged to the first pump into the expanded inflow path; A feedback valve positioned on the feedback path to open and close the feedback path and open by the switch when the drain valve is opened, the feedback valve capable of supplying an amount corresponding to the amount of backwash water among the amount of filtered water; Filtration system, characterized in that. The method according to claim 1 or 2, Located in the discharge path, further comprising a flow meter for measuring the flow rate of the filtered water discharged to the discharge path, The switch controls the opening and closing of the drain valve by the flow rate of the filtered water measured by the flow meter. The method according to claim 1 or 2, It further includes a pressure gauge for measuring the hydraulic pressure of the contaminated water and the filtered water discharged into the inlet path, respectively located in the inlet path and the discharge path, And said switch controls opening and closing of said drain valve by a hydraulic pressure difference measured by said pressure gauge. The method according to claim 1 or 2, The switch is characterized in that for controlling the opening and closing of the drain valve at a set time interval.

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