KR20170126540A - System for monitoring particle in the filtered water - Google Patents

Abstract

Provided is a system for monitoring particles in filtered water, which is to measure the presence of particles in filtered water after undergoing a filtration process, and comprises: a deaeration part accommodating filtered water and deaerating gas in the filtered water; and a sensing part connected to the deaeration part and sensing the particles in the deaerated filtered water after introduction of the filtered water which is deaerated by passing through the deaeration part.

Description

{SYSTEM FOR MONITORING PARTICLE IN THE FILTERED WATER}

The present invention relates to a filtrate particle detection system for monitoring the pollutants in filtration water subjected to a filtration process to test the integrity of the filtration process.

Recently, as the demand for advanced water treatment technology using filtration such as membrane separation has increased, the demand for technology development for the process control of these has rapidly increased. Membrane integrity tests should be performed to ensure that the membrane separation filtration process completely removes the contaminants that are subject to treatment and safely treats the raw water.

There are direct integrity test methods and indirect integrity test methods as the integrity test methods of membranes. Although there are pressure drop tests with high accuracy in representative integrity test methods, there is a problem that it is difficult to continuously monitor them despite their high accuracy.

Indirect measurement methods include particle counting, particle monitoring, and turbidity detection. Although the method using the double particle coefficient is widely applied, it has a disadvantage that the cost is high and the stability of the value is difficult according to the change of the operating condition. There is a method using turbidity detection for particle measurement, but it is difficult to use because of low particle measurement sensitivity.

In addition, although the particle monitoring method is widely used, errors due to fine bubbles generated in the process occur, and in the case of the particle monitoring equipment, the measurement error may occur due to contamination by the particles passing through the photo-zone.

The inventor of the present invention has studied for a long time in order to solve the above-mentioned problems occurring when using the particle monitoring method, developed through trial and error, and finally completed the present invention.

A related art is disclosed in Korean Patent Registration No. 10-1045263 (Registered on June 23, 2011, control device and method for improving maintenance stability for membrane filtration water treatment system).

The present invention provides a filtering water particle monitoring system that monitors particles as contaminants in filtered water by using a particle monitoring method, and reduces errors caused by minute bubbles, thereby improving the accuracy of measurement.

It is another object of the present invention to provide a filtered water particle monitoring system which can prevent the reliability of the measurement of the particle monitoring equipment from being degraded due to particle contamination of the particle monitoring equipment.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a filtering water particle monitoring system for measuring the presence or absence of particles in filtration water,

A deaeration section for receiving the filtered water and for degassing the gas in the filtered water; And

And a sensing unit connected to the deaeration unit and sensing a particle in the deaerated filtered water through the deaerated filtered water flowing through the deaeration unit.

The present invention may further include a display unit connected to the sensing unit, receiving the sensed particle information from the sensing unit, and displaying the particle information.

The de-

A receiving portion for receiving the filtered water;

An inlet line coupled to the receiving portion and capable of introducing the filtered water into the receiving portion;

A first valve formed in the inflow line for controlling inflow of the filtered water into the accommodating portion;

A degassing line coupled to the accommodating portion and discharging a gas separated from the filtered water accommodated in the accommodating portion;

A second valve coupled to the degassing line to regulate the evacuation of the gas;

A decompression pump coupled to the degassing line for decompressing the pressure inside the accommodating portion to separate the gas from the filtered water;

A discharge line coupled to the receiving portion, through which the filtered water separated from the gas is discharged; And

And a third valve coupled to the discharge line for regulating the discharge of the filtered water discharged from the receiving portion.

The sensing unit includes:

A measurement cell through which the filtered water passes through the deaeration section;

A light source for irradiating light to the filtered water moving in the measuring cell; And

And a photodetector for detecting the light passing through the filtered water to determine whether or not the particles exist in the filtered water.

Wherein the light source is a laser light source,

The photodetector may include an optical sensor for measuring shadows generated by particles in the filtered water.

In addition, the present invention may further include a cleaning unit coupled to the sensing unit to clean the sensing unit.

The cleaning unit includes:

A storage tank for storing pickling liquid; And

And a rinse solution pump coupled to the storage tank for introducing the acid rinse solution into the measurement cell.

Wherein the sensing unit includes a real-time data operation processing program,

The real-time data processing program may separate noise from light passing through the filtered water, and may transmit the noise-separated particle information to the display unit.

By using the present invention as described above, fine bubbles in the filtered water can be removed, and the accuracy of measurement of particle monitoring can be greatly improved.

Further, the contamination of the measuring cell by the particles in the filtered water is periodically cleaned by using the acid cleaning device, thereby improving the convenience of the user and improving the reliability of the measuring device.

In addition, a more accurate particle detection signal can be obtained by accurately separating the noise from the measured value, including the real-time data calculation process and the program.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a step of acquiring sample water from filtration water subjected to a filtration process according to an embodiment of the present invention, and monitoring the particles in the filtration water thus obtained.
2 is a diagram illustrating a filtered water particle monitoring system according to an embodiment of the present invention.
FIG. 3 is a view illustrating a degassing process for degassing gas in filtered water according to an embodiment of the present invention. Referring to FIG.
4 is a view illustrating a sensing unit for sensing particles in the filtered water according to an embodiment of the present invention.
5 is a diagram illustrating the detection of particles in filtrate passing through a measurement cell in accordance with an embodiment of the present invention.
It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an embodiment of a filtered water particle monitoring system according to the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, The description will be omitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a step of acquiring sample water from filtration water subjected to a filtration process according to an embodiment of the present invention, and monitoring the particles in the filtration water thus obtained.

As shown in FIG. 1, the filtrate particle monitoring system according to the present invention is for monitoring the particles in filtration water (filtration water treatment technique shown in FIG. 1) through a filtration process and testing the integrity of the filtration process. That is, the present invention is to confirm whether the contaminants to be treated in the filtration process are completely removed and the raw water is safely treated when the contaminated water is subjected to the filtration process.

The filtration process according to an embodiment of the present invention may be a membrane separation filtration process, that is, a filtration process using a membrane module. As shown in Fig. 1, raw water including pollutants is contained in a raw water tank T. The raw water stored in the raw water tank (T) can be moved to the membrane module (M) by the power of the pump (P). The raw water moving to the membrane module (M) is filtered by the membrane membrane. The treated water treated with the pollutant by the membrane membrane can be moved to a desired place by the user. At this time, it is necessary to monitor the integrity of the membrane module (M), i.e., the particles in the treated water in order to ascertain how thoroughly the contaminants have been removed. Therefore, some of the treated water is collected, and particles in the obtained sample are detected to check whether the pollutant remains.

According to one embodiment of the present invention, a process is added to remove gas in the sample prior to sensing the particles in the sample. That is, a sample is obtained, bubbles present in the sample are removed, and then the particles in the sample are sensed. The bubble elimination may be performed in the deaeration section I, and the particle sensing may be performed in the sensing section F. [ The treated water passing through the degassing part I and the sensing part F can be discharged to the outside.

2 is a diagram illustrating a filtered water particle monitoring system according to an embodiment of the present invention.

2, the filtering water particle monitoring system according to the present invention may include a deaerating unit 10, a sensing and washing unit 20, and a display unit 30.

The deaeration section 10 receives the filtered water and removes the gas (fine bubbles) in the filtered water. Filtered water refers to the raw water that has undergone a filtration process. That is, the gas is removed from the filtered water before confirming the presence of contaminants in the filtered water after filtration.

The particles which are contaminants in the filtrate can be moved to the sensing part to confirm that they still remain after the filtration process. Conventionally, in the case of the particle measuring method, since the fine bubbles in the filtered water necessarily occur in the filtration process, many errors occur and the reliability is significantly lowered. Therefore, the present invention includes a deaeration section (10). The deaeration section can remove minute bubbles present in the filtered water before the filtered water moves to the sensing section, thereby minimizing the error resulting from measurement sensing in the sensing section.

FIG. 3 is a schematic view of a degassing process for degassing gas in filtered water according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 3, the degassing process in the filtered water will be described. First, a filtered water sample is introduced into the degassing tank T through a filtration process. At this time, the degassing tank (T) includes an inlet pipe (I) through which filtered water is introduced before deaeration, a discharge pipe (O) through which degassed filtered water is discharged, a degassing vessel (V) And a degassing pump VP for decompressing the inside of the filtration tank T and separating the gas A from the filtration water.

The process (1) in FIG. 3 shows that the filtered water sample flows into the degassing tank T. At this time, the inlet pipe I is opened, and the outlet pipe O and the degassing vessel V are closed. At this time, the degassing pump VP operates and the inside of the degassing tank T is decompressed. When the degassing tank T is depressurized, the gas A present in the filtered water is separated from the filtered water. The process (2) in FIG. 3 shows that the degassing tank T is decompressed by the degassing pump VP to separate the gas A in the filtered water. At this time, the inlet pipe (I), the outlet pipe (O), and the degassing vessel (V) are all closed.

3 shows that the degassing pump VP discharges the gas A separated from the filtrate water to the outside through the degassing vessel V while increasing the pressure inside the degassing tank T. [ At this time, the inlet pipe I and the outlet pipe O are closed, and only the degassing vessel V is opened. The process (4) in FIG. 3 shows that the filtered water after the degassing is discharged through the discharge pipe (O). At this time, the inlet pipe I and the degassing vessel V are closed, and only the outlet pipe O is opened. Thus, the gas A in the filtered water is separated and discharged from the filtered water, and the filtered water in which the gas A is removed for particle detection can be obtained.

Referring again to FIG. 2, a degassing unit according to an embodiment of the present invention will be described in detail. The degassing unit according to the present invention includes a receiving unit 100, an inflow line 200, a first valve 210, a degassing line 300, a second valve 310, a decompression pump 320, a discharge line 400, , And a third valve (410).

The receptacle 100 provides a space for receiving filtered water after filtration. The degassing process of the filtered water also proceeds in the accommodating portion 100. A part of the filtered water having the contaminants removed through the membrane module can be introduced into the receiving portion 100, and the gas in the filtered water can be separated and removed.

The inlet line 200 provides a passage through which the filtered water, which is coupled to the receptacle 100 and is filtered, moves to the receptacle 100. At this time, a first valve 210 is formed in the inflow line 200.

The first valve 210 is formed in the inflow line 200 to adjust the amount of filtered water flowing into the receiving unit 100. The first valve 210 is opened to allow filtered water for particle measurement to flow and the first valve 210 is closed when a sufficient amount of filtered water flows into the receiving portion 100.

The degassing line 300 is coupled to the receiving portion 100 and discharges gas separated from the filtered water contained in the receiving portion 100. At this time, the process of separating the gas from the filtered water is performed by the decompression pump 320 coupled to the degassing line 300. The decompression pump 320 separates the filtered water and the gas by lowering the pressure in the accommodating portion 100. The separated gas can be discharged to the outside through the degassing line 300.

The second valve 310 is coupled to the degassing line 300 to regulate the evacuation of the gas. With the opening of the second valve 310, the gas can be discharged to the outside. 3, the decompression pump 320 lowers the pressure inside the container 100 to separate the gas from the filtered water, and opens the separated gas to open the second valve 310 And discharging it to the outside. The inflow line 200 through which the filtered water flows into the receiving part 100 and the discharge line 400 through which the filtered water is discharged from the receiving part 100 are separated by the first valve 210 and the third valve 410, Lt; / RTI >

The discharge line 400 is coupled to the accommodating portion 100, and the filtered water from which the gas is separated is discharged. The discharge line 400 may be directly connected to the sensing unit, and the discharged filtered water may be introduced into the sensing unit.

A third valve 410 is coupled to the discharge line 400. The filtered water separated from the receiving portion 100 through the opening of the third valve 410 can be moved to the sensing portion. At this time, the inflow line 200 and the degassing line 300 are closed by the first valve 210 and the second valve 310, respectively.

An appropriate amount of filtered water for the degassing through the reduced pressure should be introduced into the receiving portion 100 of the deaeration portion. If too much filtered water flows into the accommodating portion 100 and the accommodating portion 100 is filled up, degassing due to reduced pressure is not properly performed. Therefore, it is preferable that a proper amount of filtered water is introduced into the accommodating portion 100 and accommodated therein.

If a larger amount of filtered water flows into the accommodating portion 100 than an appropriate amount of filtered water, it is important to discharge a predetermined amount to the outside and maintain a proper amount of filtered water. Therefore, in an embodiment of the present invention, when a larger amount of filtered water than the proper amount is introduced into the receiving part 100, the filtered water holding line (not shown) for discharging the filtered water to the outside and holding a proper amount of filtered water in the receiving part 100, As shown in FIG.

In addition, the deaeration section may further include residual filtrate discharge section 500 and residual filtrate discharge control valve 510. The filtered water remaining in the accommodating portion 100 can be discharged to the outside and emptied in the accommodating portion 100 without moving to the sensing portion after the degassing. It is possible to improve the reliability of the deaeration process and the sensing process of the other filtered water to be performed later through the discharging process of emptying the receiving portion 100. [ That is, when the degassing process and the sensing process of the filtered water sample are completed, all the filtered water in the accommodating portion 100 is discharged to empty the accommodating portion 100 and prepare for the next process.

The sensing and cleaning unit 20 includes a sensing unit 600 and a cleaning unit. The sensing unit 600 is connected to the deaeration unit. In detail, the filtered water, which is directly connected to the discharge line 400 of the degassing part, is separated from the gas and flows through the discharge line 400. The sensing unit 600 is connected to the degassing unit, and senses the remaining particles in the degassed filtered water through the degassing unit.

4 is a view illustrating a sensing unit for sensing particles in the filtered water according to an embodiment of the present invention. At this time, the sensing unit includes a measurement cell 610, a light source 620, a photodetector 630, and a lens unit 640.

The measuring cell 610 provides a passage through which the filtered water passes through the degassing section. The filtered water traveling through the measurement cell 610 can be grasped by the light source 620 and the photodetector 630 to determine whether particles remain. The light source irradiates light to the filtered water moving through the measurement cell 610. At this time, the light source 620 can irradiate a laser as a laser light source. The laser has excellent linearity and is easy to detect particles. And the photodetector 630 includes an optical sensor. The optical sensor captures shadows generated by particles present in the filtered water.

5 is a diagram illustrating the detection of particles in filtered water passing through a measurement cell in accordance with an embodiment of the present invention.

4 and 5, the sensing unit according to the present invention collects the light L emitted from the light source through the lens unit, and the collected light passes through the filtered water W passing through the measurement cell. At this time, when the particles P remain in the filtered water W, the shadow S can be detected by the photodetector LS by the remaining particles P. The existence of the particles can be grasped through the detected shadow (S). That is, the photodetector LS measures shadows with an optical sensor and converts the measured shadows into electrical signal pulses. Then, the photodetector LS can grasp the presence or absence of particles in the filtered water by a photo-zone method that calculates the size and number of particles from the converted signal pulse.

Referring again to FIG. 2, the filtered water particle detection system according to an embodiment of the present invention further includes a display unit 30. The display unit 30 is electrically connected to the sensing unit, receives particle information from the sensing unit, and displays the particle information on a monitor or the like. By providing particle information in the filtered water in real time, it is possible to check the completeness of the filtration process in real time.

The sensing unit according to the present invention includes a real-time data operation processing program, so that information from the photodetector can be processed in real time. In addition, the real-time data processing program can separate noise from light passing through the filtered water, amplify the noise-separated particle information, and output it as a stable signal. That is, the real-time data processing program can separate the noise and the input signal generated during the amplification of the microcurrent measured by the photodetector and output the accurate measurement value. At this time, the output signal is transmitted to the display unit 30, and the display unit 30 receives the signal and displays it on a monitor or the like so that the user can check it in real time.

The filtered water particle monitoring system according to the present invention may further include a washing unit.

The cleaning unit is coupled to the sensing unit to clean the sensing unit. The sensing part may be contaminated by contaminants (particles) in the filtered water passing through the measuring cell. Such contamination of the measuring cell can cause an error in the measured value. Therefore, the filtered water particle monitoring system according to the present invention further includes a cleaning unit that can periodically clean the measurement cell. The cleaning unit can automatically clean the measuring cell periodically, thereby improving the convenience of the user and greatly improving the reliability of the measurement.

The cleaning section includes a storage tank 700 and a cleaning liquid pump 800. The storage tank 700 stores a pickling solution for pickling the measurement cell. Then, the washer fluid pump 800 provides the power for introducing the pickling fluid into the measuring cell. That is, the cleaning liquid pump 800 can draw the acid cleaning liquid from the storage tank 700 and provide the power to pass the acid cleaning liquid through the sensing unit, thereby allowing the pickling liquid to clean the sensing unit.

The washing unit includes an outflow line through which the acid washing liquid flows out from the washing unit, an outflow valve 710 that controls the outflow of the acid washing liquid, an inflow line through which the pickled washing liquid is sent, The inlet valve 720 is connected. With this configuration, it is possible to reuse the acid cleaning liquid used for cleaning the sensing unit.

As shown in FIG. 2, the degassed filtered water passing through the degassing section passes through the measuring cell in the positive direction, and the particles in the filtered water can be measured. In the opposite direction, the acid scrubbing liquid passes through the measuring cell and cleans the measuring cell. During the washing of the measuring cell, the particle measurement of the filtered water stops for a while. That is, the third valve 410 is in a locked state during the washing, and the inflow of the filtered water to the sensing unit is stopped.

After the sensing of the particles, the filtered water is discharged to the discharge pipe (DL). At this time, the discharge of the sensed filtered water can be controlled by the discharge pipe valve 730.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the scope of protection of the present invention can not be limited by obvious alterations or permutations of the present invention.

T: raw water tank
P: Pump
M: Membrane module
I:
F: sensing unit
10:
20: sensing and cleaning unit
30:
100:
200: Inflow line
210: first valve
300: degassing line
310: second valve
320: Pressure reducing pump
400: discharge line
410: third valve
500: Residual filtered water discharge portion
510: Residual filtrate discharge control valve
600: sensing part
610: Measurement cell
620: Light source
630: Photodetector
640:
700: Storage tank
800: Cleaning fluid pump
DL: discharge pipe
T: Melting base
I: inlet pipe
O: discharge pipe
V: degranulation
VP: Deaeration pump
A: Gas
W:
L: laser light
P: Particle
S: Shadow
LS: Photodetector

Claims (8)

A filtering water particle monitoring system for measuring the presence or absence of particles in filtration water through filtration,
A deaeration section for receiving the filtered water and for degassing the gas in the filtered water; And
And a sensing unit connected to the deaeration unit and sensing debris from the deaerated filtered water through the deaerated filtered water through the deaeration unit. The method according to claim 1,
And a display unit connected to the sensing unit to receive the sensed particle information from the sensing unit and display the particle information. The method according to claim 1,
The de-
A receiving portion for receiving the filtered water;
An inlet line coupled to the receiving portion and capable of introducing the filtered water into the receiving portion;
A first valve coupled to the inflow line and regulating inflow of the filtered water into the receiver;
A degassing line coupled to the accommodating portion and discharging a gas separated from the filtered water accommodated in the accommodating portion;
A second valve coupled to the degassing line to regulate the evacuation of the gas;
A decompression pump coupled to the degassing line for decompressing the pressure inside the accommodating portion to separate the gas from the filtered water;
A discharge line coupled to the receiving portion, through which the filtered water separated from the gas is discharged; And
And a third valve coupled to the discharge line for controlling the discharge of the filtered water discharged from the receiving portion. 3. The method of claim 2,
The sensing unit includes:
A measurement cell through which the filtered water passes through the deaeration section;
A light source for irradiating light to the filtered water moving in the measuring cell; And
And a photodetector for detecting the light passing through the filtered water and determining the presence or absence of the particles in the filtered water. 5. The method of claim 4,
Wherein the light source is a laser light source,
Wherein the photodetector comprises a photosensor for measuring shadows generated by particles in the filtered water. 5. The method of claim 4,
And a cleaning unit coupled to the sensing unit to clean the sensing unit. The method according to claim 6,
The cleaning unit includes:
A storage tank for storing pickling liquid; And
And a cleaning liquid pump coupled to the storage tank for introducing the acid cleaning liquid into the measurement cell. 5. The method of claim 4,
Wherein the sensing unit includes a real-time data operation processing program,
Wherein the real-time data processing program separates noise from the light passing through the filtered water, and amplifies the noise-separated particle information.

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