KR101938536B1 - Membrane Filtration system using Physical and Chemical Characteristics of Nano Bubble - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a membrane filtration system using physico-chemical properties of ultra-fine grained fabrics. The present invention relates to a membrane filtration system for supplying ultrafine grains to an influent water and mixing the same. Wherein the inflow water mixed with the ultra-high strength foam flows into the front end, the inflow water flows through the plurality of filtration membrane elements connected in series, treated with a filtration membrane and discharged to the downstream side; And a flow rate regulating device for regulating the flow rate of the influent water passing between the plurality of filter elements, respectively.

Description

{Membrane Filtration System using Physical and Chemical Characteristics of Nano Bubble}

TECHNICAL FIELD The present invention relates to a membrane filtration system, and more particularly, to a membrane filtration system that performs membrane filtration, pretreatment, and maintenance cleaning using physicochemical properties of ultra-fine grains.

In a conventional membrane filtration system, membrane fouling occurs inevitably because the concentration polarization layer is formed on the membrane surface and the particulate matter accumulates, thereby increasing the turbulence and frictional force at the membrane surface.

As a result, the permeate flux is reduced, and residual layers on the surface of the membrane are generated to accelerate contamination of inorganic, organic, colloid, and biological membranes.

Particularly, the influent water has the greatest influence on the membrane contamination phenomenon. The concentration polarization layer generated on the surface of the membrane supersenses the contaminant concentration on the surface of the membrane to cause crystal nucleation and crystal growth, A membrane layer is formed at a rapid rate as compared with the velocity.

In order to solve this problem, existing technologies remove organic, inorganic, colloidal, and biological pollutants contained in membrane layer by various methods such as acid washing, salt washing and reverse cleaning, or to remove membrane pollutants in the pretreatment process.

However, the pretreatment process increases the installation cost and maintenance cost in the whole process, and the membrane contamination phenomenon changes differently depending on the selection of the pretreatment process and the possibility of new membrane contamination due to the new membrane contaminant occurring in the pretreatment process .

In addition, the membrane cleaning process is the most commonly used process to remove the existing membrane contamination layer and restore the existing membrane efficiency. However, it affects the membrane surface functional group composed of a polymer material and has a serious effect on the membrane tensile strength Thus, the film life is rapidly reduced.

Membrane contamination is a process that necessarily occurs in the membrane filtration process. In order to solve this problem effectively, physical washing does not affect the membrane surface. Currently, researches on maintenance of the membrane filtration process using micro bubbles are under way have.

Micro-bubbles increase the turbulence on the membrane surface and are effective for disinfection and odor removal due to their physicochemical properties.

Hereinafter, the related art will be considered.

In Patent Document 1, as a membrane filtration module, fine bubbles are mixed with inflow water introduced using a venturi type device provided at one side of a filtration membrane element, so that inflow water treatment and filtration membrane cleaning are performed.

The disadvantage of micro-bubbles is that there is no problem with the effect of micro-bubbles in a system in which a single element or a single element is connected in parallel, but in recent plant processes, a vessel containing a plurality of filtration membrane elements per process unit is used, The effect of the microbubbles at the downstream of the vessel in which the influent water is introduced and the vessel at the downstream of the vessel in which the treated water is discharged is large and the effect at the downstream of the vessel is not deteriorated. There is a disadvantage that the effect can not be surely obtained.

KR 2007-0034110 A

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 membrane filtration system that performs membrane filtration and cleaning using the characteristics of a super- .

In order to achieve the above object, the present invention provides a super strength centrifugal feeder for feeding and mixing super strength centrifugal force to inflow water; Wherein the inflow water mixed with the ultra-high strength foam flows into the front end, the inflow water flows through the plurality of filtration membrane elements connected in series, treated with a filtration membrane and discharged to the downstream side; And a flow rate regulating device for regulating the flow rate of the influent water passing between the plurality of filter elements, respectively.

Wherein the flow rate adjusting device controls the flow rate of the inflow water passing between the plurality of filter elements corresponding to the inter-membrane pressure difference sensed by the sensor desirable.

A treated water storage tank in which treated water discharged from a rear end of the vessel is stored; And a concentrated water storage tank in which the concentrated water discharged from the vessel is stopped and discharged from the rear end of the vessel, wherein the treated water stored in the treated water storage tank flows into the front end and the stop of the vessel as washing water, And the washing water after the washing is discharged to the end and the rear end of the vessel and flows into the concentrated water storage tank and is stored.

And a heat exchanger for regulating the temperature of the super strength centrifugal fan supplied to the inflow water.

A pretreatment unit in which inflow water flows in and is stored; A super strong force supplying device for supplying a super strong force to the pretreatment part to mix the super strong force with the inflow water stored in the pretreatment part; Wherein the inflow water mixed with the ultra-high-strength foam is introduced into the front end of the pretreatment unit, the inflow water flows through the plurality of filtration membrane elements connected in series, treated with the filtration membrane and discharged to the downstream side; And a flow rate regulating device for regulating the flow rate of the influent water passing between the plurality of filter elements, respectively.

The skimmer may further include a skimmer disposed at an upper portion of the pretreatment unit. The skimmer collects and discharges particulate matter floating by the ultra-weak force supplied to the inflow water stored in the pretreatment unit.

As described above, according to the membrane filtration system using the physicochemical properties of the ultra-fine woven fabric according to the present invention, the ultra-fine wastewater having a long residence time can be mixed with the influent water to perform membrane cleaning and membrane filtration to minimize energy consumption It can continuously affect the membrane filtration process positively, and the process can be minimized.

Further, in a membrane filtration system having a plurality of membrane elements, it is possible to maximize the physicochemical characteristics of the membrane membrane filtration system having a plurality of membrane elements by controlling the flow rate between the membrane elements , It is possible to reduce the operation energy and increase the number of treated water.

FIG. 1 is a schematic view of a membrane filtration system using physicochemical properties of ultra-fine grained fabrics according to an embodiment of the present invention.
FIG. 2 is a schematic view of a membrane filtration system using physicochemical properties of ultra-fine grained fabrics according to another embodiment of the present invention.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.

In addition, the described embodiments are provided for illustrative purposes and do not limit the technical scope of the present invention.

In the following description, the term " connected " does not mean that any configuration and configuration are necessarily connected directly, and does not exclude the existence of another configuration between the connected configuration and the configuration.

Hereinafter, a membrane filtration system using physicochemical properties of ultra-fine grains according to an embodiment of the present invention (hereinafter referred to simply as "membrane filtration system" for convenience and understanding) will be described in detail with reference to FIG. 1 Explain.

The membrane filtration system according to an embodiment of the present invention includes a super strength supporter, a vessel 100, a flow rate regulator, a treated water storage tank 400, and a concentrated water storage tank 500.

The vessel 100 includes a plurality of filtration membrane elements connected in series.

In an embodiment of the present invention, a vessel 100 in which six filter elements 101, 102, 103, 104, 105, and 106 are connected in series is illustrated as an example in FIG. But may be composed of a vessel 100 including two or more filtration membrane elements 101 to 106.

In the following description, the portion of the vessel 100 is referred to as the front end on the side where the inflow water is introduced, the side on the opposite side from which the inflow water is introduced, and the side on which the treated water is discharged is referred to as the rear end.

The inflow water flows into the front end 100A of the vessel 100. The inflow water flows through a plurality of elements connected in series and is filtered and discharged to the rear end 100C of the vessel 100. [

On the other hand, the concentrated water generated by the membrane filtration process of the influent water is exhausted to the end 100B and the rear end 100C of the vessel 100, respectively.

The ultra-fine grained feeder 200 generates super-fine grains to feed the ultra-fine grains to the influent water flowing into the front end 100A of the vessel 100 and mix them.

The inflow water is introduced into the front end 100A of the vessel 100 by the pump P1 provided in the membrane filtration system inflow section, and the ultra-high strength foam supplied from the ultra- And flows into the front end 100A of the vessel 100.

In the line for supplying ultra-fine grained bobbins in the ultra-fine grained bobbin feeder 200, a heat exchanger is provided, and a heat exchange medium supplied from the temperature controller 300 connected to the heat exchanger through the pump P3 to the heat exchanger, The temperature of the ultrahigh pressure mercury vapor can be controlled and supplied.

The heat exchanging medium to be supplied is not limited, but it is possible to supply water at a suitable temperature to the heat exchanging apparatus as a heating medium, and supply the heat-exchanged water to the vessel 100 so as to be treated as treated water.

As described above, the inflow water having the ultra-high strength mixed therein flows into the vessel 100, and the membrane filtration is performed through a plurality of elements connected in series.

In this way, the microorganisms / pathogenic microorganisms, organic matter and refractory pollutants present in the inflow water can be oxidized, decomposed and removed by mixing the inflow water with the ultracentrifugal cells and treating them by flowing into the vessel 100.

In addition, the ultra-high strength fabric mixed with the ultra-high strength yarn passes through the filtration membrane elements 101 to 106 and is subjected to membrane filtration. At the same time, the super strength yarn increases turbulence at the filtration membrane surface. It is effective to remove biological membrane contaminants present in influent water, disinfection and odor by generating ultrasonic wave, negative pressure, high temperature and anion at the point of time when the pressure decreases.

In addition, the bubble surface has the effect of adsorbing contaminants, which is one of the factors that can reduce film contamination.

That is, by mixing the ultra-fine grains with the influent water and introducing them into the vessel 100, it is possible to simultaneously obtain the membrane filtration treatment of the influent water and the predetermined cleaning effect, thereby preventing or delaying the membrane contamination.

Since the physico-chemical properties of the ultra-fine grained fabric have relatively high specific surface area, charge value, ultrasound, negative pressure, high temperature, turbulence, and residence time in the membrane filtration process, Which is effective for membrane filtration process maintenance.

The flow rate controllers 110, 120, 130, 140 and 150 adjust the flow rates of the inflow water passing through the plurality of filter elements 101 to 106 between the plurality of filter elements 101 to 106 in the vessel 100 do.

In the case of a membrane filtration process using a conventional single membrane filter element, it is possible to simply mix the ultra-fine membrane membrane with the influent water and supply it to the filtration membrane element. However, according to the plant to which the membrane filtration system is applied, The bezel 100 is often applied.

In this case, the effect of the ultra-fine strength blended in the influent water is reduced toward the rear end 100C of the vessel 100.

However, the ultra-high strength catheter included in the inflow water can be stably transmitted to the rear end 100C of the vessel 100 through the flow rate controllers 110, 120, 130, 140 and 150, Uniform film fouling reduction effect can be seen over the rear end 100C.

The flow rate control of the inflow water in the flow rate controllers 110, 120, 130, 140, and 150 is adjusted using the inter-membrane pressure difference of the vessel 100.

For this purpose, a sensor (not shown) may be provided between the filter elements 101 to 106.

The flow rate regulating devices 110, 120, 130, 140 and 150 are disposed between the plurality of filter elements 101 to 106 in the vessel 100, by using the differential pressure between the membranes of the respective filter elements 101 to 106 sensed through the sensors The flow rate of the influent of

In the case of the inter-membrane pressure difference, when the differential pressure between the membranes at the front end 100A and the rear end 100C of the vessel 100 is 2 bar or more, the filtration membrane contamination is initiated, 110, 120, 130, 140, 150) adjusts the flow rate of the influent water when the inter-membrane pressure difference sensed by the sensor is 2 bar or exceeds the preset inter-membrane pressure difference value according to the filter membrane element, It is possible to reduce the membrane contamination of the plurality of filter elements 101 to 106 extending from the front end 100A to the rear end 100C of the vessel 100 by improving the mobility of the ultra-

The treated water storage tank 400 is connected to the rear end 100C of the vessel 100 and passes through the vessel 100 and the treated water subjected to membrane filtration is inflowed and stored.

The concentrated water storage tank 500 is connected to the stop 100B and the rear end 100C of the vessel 100 and the concentrated water generated and discharged by the membrane filtration treatment in the vessel 100 is introduced and stored.

As described above, it is possible to reduce the occurrence and progress of the membrane contamination in the membrane filtration process by the ultra-fine grains mixed with the influent water. However, since it can not completely prevent such contamination, a separate membrane washing step may be required.

For this purpose, the treated water stored in the treated water storage tank 400 is supplied to the vessel 100 as washing water through the pump P4, thereby performing the membrane washing.

Since the treated water stored in the treated water storage tank 400 also contains ultra-fine strength, a further improved effect can be obtained depending on the characteristics of the ultra-fine strength film even in the case of membrane washing.

It is preferable that the treated water serving as cleansing water supplied to the vessel 100 is supplied to the front end 100A and the middle portion 100B of the vessel 100, Since there are two concentrated water at the stop 100B and the rear end 100C of the vessel 100, the water is supplied in two parts and the cleaning progresses.

The cleansing water after being supplied to the vessel 100 and having a plurality of filtration membrane elements 101 to 106 washed in the vessel 100 is discharged to the end 100B and the rear end 100C of the vessel 100, And stored together with the concentrated water.

There is also a super-strength bottle in the concentrated water storage tank 500 in which the cleansing water after cleaning is stored as the treated water is supplied to the cleansing water.

Therefore, it is possible to prevent the accumulation of water in the concentrated water storage tank 500 due to the membrane contaminants (microorganisms, inorganic contaminants, organic contaminants, colloidal substances) present in the concentrated water and the cleansing water stored in the concentrated water storage tank 500 Additional water pollution can be prevented.

Hereinafter, a membrane filtration system according to another embodiment of the present invention will be described with reference to FIG.

Hereinafter, for the sake of understanding of the present embodiment, differences from the above embodiment will be mainly described, and other similar configurations are denoted by the same reference numerals as those in the above embodiments, and a description thereof will be omitted.

The membrane filtration system according to the present embodiment further includes a pretreatment unit 10.

The pretreatment unit 10 is connected to the front end 100A of the vessel 100. Unlike the embodiment described above, the pre-treatment unit 10 is introduced into the pretreatment unit 10 before the inflow water is introduced into the front end 100A of the vessel 100 .

The ultracentrifugal force feeder 200 feeds the ultrahigh pressure centrifugal force to the inflow water flowing into the pretreatment unit 10 through the pump and stored in the pretreatment unit 10 through the jetting unit 11.

Since the ultra fine grained bubble has a relatively high residence time than the conventional micro bubbles as described above, the contaminant removal and flotation process in the pretreatment unit 10 can be further performed.

In this case, as in the above embodiment, the temperature controller 300 supplies the heat exchange medium to the heat exchanger through the pump P3 to regulate the temperature of the ultra-high strength fuel supplied, And can be subjected to membrane filtration treatment as treated water.

Microorganisms / pathogenic microorganisms, organic matter, and refractory contaminants existing in the inflow water can be primarily oxidized, decomposed and removed as the ultra-fine density cells are supplied to the inflow water stored in the pretreatment unit 10.

In addition, the ultra fine grained bubbles supplied into the pretreatment unit 10 float in the inflow water, and the microfine bubbles floating thereon are attached to the upper surface.

The skimmer 12 is located on the upper part of the pretreatment unit 10 to collect the particulate film contaminants floated by the ultra-high strength bodily fluids and discharge them out of the pretreatment unit 10.

The inflow water that has been pretreated by the pretreatment unit 10 in the pretreatment unit 10 is first introduced into the front end 100A of the vessel 100 through the pump P10 between the pretreatment unit 10 and the vessel 100 , And the other steps are the same as those in the above embodiment.

In this embodiment, the pre-treatment unit 10 further includes the pre-treatment unit 10, so that the pre-treatment with the ultra-high strength cloth is firstly performed by introducing the inflow water into the pretreatment unit 10, .

As described above, according to the membrane filtration system of the present invention, it is possible to minimize the energy consumption by performing the membrane cleaning and the membrane filtration treatment by mixing the ultra-fine wastewater having a long residence time into the influent water, And minimization of process is possible.

Further, in a membrane filtration system having a plurality of membrane elements, it is possible to maximize the physicochemical characteristics of the membrane membrane filtration system having a plurality of membrane elements by controlling the flow rate between the membrane elements , It is possible to reduce the operation energy and increase the number of treated water.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that numerous modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. And equivalents should also be considered to be within the scope of the present invention.

100: Bezel
200: Ultra-high strength foil feeder
300: Temperature controller
400: treated water reservoir
500: concentrated water storage part

Claims (5)

Ultra-fine grained feeder to feed and mix ultra-fine grained fibers to the influent;
A heat exchanger for regulating the temperature of the super strength centrifuge supplied to the inflow water;
Wherein the inflow water mixed with the ultra-high strength foam flows into the front end, the inflow water flows through the plurality of filtration membrane elements connected in series, treated with a filtration membrane and discharged to the downstream side;
A flow rate adjusting device for adjusting a flow rate of the inflow water passing between the plurality of filter elements;
A treated water storage tank for storing the treated water mixed with ultra-high strength discharged from the rear end of the vessel; And
And a concentrated water storage tank in which the concentrated water discharged from the end of the vessel and the rear end of the vessel is stored,
The treated water stored in the treated water storage tank flows into the front end and the middle of the vessel as washing water to clean the plurality of filter elements and the washed water after being washed is discharged to the end and the rear end of the vessel, Which is stored,
Membrane Filtration System Using Physicochemical Properties of Ultrasonic Centrifuge.
The method according to claim 1,
Further comprising a sensor for sensing a differential pressure between the plurality of filter elements,
Wherein the flow rate adjusting device adjusts a flow rate of the inflow water passing between the plurality of filter elements corresponding to the inter-
Membrane Filtration System Using Physicochemical Properties of Ultrasonic Centrifuge.
A pretreatment unit for flowing influent water and storing the influent water;
A super strong force supplying device for supplying a super strong force to the pretreatment part to mix the super strong force with the inflow water stored in the pretreatment part;
A heat exchanger for regulating the temperature of the super strength centrifuge supplied to the inflow water;
Wherein the inflow water mixed with the ultra-high-strength foam is introduced into the front end of the pretreatment unit, the inflow water flows through the plurality of filtration membrane elements connected in series, treated with the filtration membrane and discharged to the downstream side;
A flow rate adjusting device for adjusting a flow rate of the inflow water passing between the plurality of filter elements;
A treated water storage tank for storing the treated water mixed with ultra-high strength discharged from the rear end of the vessel; And
And a concentrated water storage tank in which the concentrated water discharged from the end of the vessel and the rear end of the vessel is stored,
The treated water stored in the treated water storage tank flows into the front end and the middle of the vessel as washing water to clean the plurality of filter elements and the washed water after being washed is discharged to the end and the rear end of the vessel, Which is stored,
Membrane Filtration System Using Physicochemical Properties of Ultrasonic Centrifuge.
The method of claim 3,
Further comprising a sensor for sensing a differential pressure between the plurality of filter elements,
Wherein the flow rate adjusting device adjusts a flow rate of the inflow water passing between the plurality of filter elements corresponding to the inter-
Membrane Filtration System Using Physicochemical Properties of Ultrasonic Centrifuge.
The method of claim 3,
Further comprising a skimmer provided at an upper portion of the pretreatment unit,
The skimmer captures and discharges the particulate matter floating by the ultra-weak force supplied to the inflow water stored in the pre-
Membrane Filtration System Using Physicochemical Properties of Ultrasonic Centrifuge.

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