KR102145037B1 - Rapid float filtration device - Google Patents

Abstract

An object of the present invention is to provide a rapid flotation filtration device capable of increasing water treatment efficiency by lowering the concentration of wastewater and reducing suspended solids in the wastewater.
That is, the present invention comprises a microbubble spraying unit 10 provided to coagulate fine contaminants in the form of bubbles by spraying microbubbles in the tangential direction of the inner wall of the filtration tank 100 in which wastewater is stored to generate a vortex; A coarse bubble spraying unit 20 provided to adsorb and float bubbles agglomerated by microbubbles by spraying coarse bubbles from the bottom of the filtration tank 100; A scum treatment unit 30 provided with a rotary scraper 32 to push and remove the scum floating above the wastewater surface from the top of the filtration tank 100 to the scum discharge pipe 31; A filtration unit 40 installed in the center of the filtration tank 100 to filter and discharge wastewater from which fine pollutants have been flocculated and removed; And a drain unit 50 provided to collect and discharge coarse pollutants deposited on the bottom of the filtration tank 100.
The use of the rapid flotation filtration device has an advantage in that the coagulation of fine contaminants is well performed, and they are adsorbed by coarse bubbles to be floated at a high speed, thereby greatly reducing the wastewater treatment time.

Description

Rapid float filtration device

The present invention relates to a rapid-floating filtration device, which is described in more detail, and to a rapid-floating filtration device capable of increasing water treatment efficiency by reducing the concentration of wastewater and reducing suspended solids in the wastewater.

In general, the concentration of population due to urbanization and industrialization caused by industrial development leads to the generation of large amounts of domestic sewage and industrial wastewater, which has a serious impact on the environmental ecosystem by increasing and accumulating pollution loads on the surrounding environment. In other words, water pollution is becoming severe due to the rapid increase in domestic sewage, industrial wastewater, fishery wastewater or livestock wastewater from factories.

However, even though water pollution is accelerating, wastewater treatment is becoming difficult as devices and places that can actually treat contaminated water are limited, and enormous costs are incurred in order to improve water pollution.

Accordingly, in the conventionally disclosed wastewater treatment system applied to the microbubble device of Patent Publication No. 10-2011-0046132, a chemical mixing tank, a microbubble generation amount control device, a wastewater flotation separation tank, a scum treatment room, a pump for generating microbubbles, a dissolved tank, and a microbubble. A wastewater treatment system composed of a circulation pipe and a wastewater recycling tank that can effectively treat scum contained in wastewater using inexpensive microbubbles has been disclosed.

In the sewage treatment apparatus of Patent Registration No. 10-1204395, which is another conventional technique, a sludge or biofilm fluidized bed is formed by filling the reactor with sludge and a fluidized bed carrier and aeration from the bottom of the reactor, and at the boundary between the upper and lower parts of the reactor. The reactor treated water is discharged to perform advanced treatment such as removal of organic and inorganic matter from wastewater and nitrogen removal, and surfactants dissolved in wastewater or present in micelle form are transferred to the interface between air or oxygen bubbles, air and wastewater, and A technology for treating dissolved pollutants, etc., floating along with bubbles has been previously registered.

However, the conventional techniques are techniques for treating particulate matter contained in wastewater using bubbles, but among the pollutants, nitrogen, phosphorus, and ultrafine particles are not easily coagulated by bubbles. In order to increase the size of the facility, the amount of wastewater treatment per hour decreased sharply due to the prolonged bubble injection time, and a high level of coagulation efficiency was difficult to expect.

KR 10-2011-0046132 A (2011.05.04.) KR 10-1204395 B1 (2012.11.19.)

In the present invention, in order to solve all the problems of the prior art, a new technology was invented. By generating microbubbles and spraying them in the tangential direction of the filter tank, the fine contaminants easily react with the microbubbles to agglomerate in the form of bubbles. It is a problem to be solved in the present invention to provide a rapid flotation filtration device that is adsorbed by coarse bubbles rising rapidly in the lower portion of the filtration tank and treated at a high speed.

Along with this, although not described separately, other objects within the range that can be inferred in consideration of the specific content and claims for carrying out the following invention are also included in the entire subject of the present invention.

As a specific means for solving the problem of the above invention, in the present invention, a rapid floating filtration device is constructed, and nitrogen, phosphorus and suspended matter are included while generating vortices by spraying microbubbles in a tangential direction of the filtration tank 100 in which wastewater is stored. A microbubble spraying unit 10 provided to coagulate the fine contaminants in the form of bubbles; A coarse bubble spraying unit 20 provided to adsorb and float bubbles aggregated by microbubbles by spraying coarse bubbles from the bottom of the filtration tank 100; A scum treatment unit 30 provided with a rotary scraper 32 to remove the scum floating above the wastewater surface from the top of the filtration tank 100 by pushing it toward the scum discharge pipe 31; A filtration unit 40 installed in the center of the filtration tank 100 to filter and discharge wastewater from which fine pollutants have been flocculated and removed; And a drain unit 50 provided to collect and discharge coarse pollutants deposited on the bottom of the filtration tank 100.

At this time, the microbubble spraying part 10 is connected to the cylindrical part 12, the cylindrical part 12 and the conical part 14 in which the injection hole 14a is formed at the end, and the cylindrical part 12 It is installed in a tangential direction and consists of an inlet pipe 16 connected to the pump 16a, and the microbubble moves to a cylindrical portion and a conical portion while turning along the tangential direction of the cylindrical portion 12 through the inlet pipe 16. , Micro bubbles collide with the inner walls of the cylindrical portion 12 and the cone portion 14 by the centrifugal force of the swirling flow, and are provided to be finely divided.

In addition, the coarse bubble injection unit 20 includes a main pipe 22 connected to the coarse bubble generating blower 22a, and a plurality of discharge ports connected to the main pipe 22 to eject coarse bubbles from the bottom of the filtration tank 100. A distribution pipe 24 in which (24a) is formed, and a bubble diffusion plate 26 installed above the distribution pipe 24 and in which a diffusion hole 26a is formed so as to distribute coarse bubbles to the entire bottom of the filter tank 100 It characterized in that it comprises.

In addition, the screen tube 42 for primary filtering of wastewater, the backwash tube 44 disposed to pass through the center of the screen tube 42, and the wastewater that is densely inserted into the inside of the screen tube 42 and filtered first. A fibrous filter 46 for secondary filtering, a storage tank 48 formed at the bottom of the screen tube 42 to receive the treated water passing through the fibrous filter 46, and the screen tube 42 and the reservoir 48 It is characterized in that it comprises a mesh plate 47 formed therebetween, one end connected to the bottom of the storage tank 48 and a treated water discharge pipe 49 extending to the outside of the filtering tank 100 at the other end.

According to the specific means for solving the above-described problem, a vortex is generated by the microbubbles sprayed in the tangential direction of the filter tank, and the collision and pressure increase cause the microcontaminants including nitrogen, phosphorus and suspended matter contained in the wastewater to be easily separated from the microbubbles. It reacts and coagulates well in the form of bubbles,

The bubble-shaped agglomerates are adsorbed by coarse bubbles rising from the bottom of the filtration tank and are treated at a high speed, so that the wastewater treatment time is greatly shortened and the coagulation efficiency is remarkably improved.

1 is a block diagram showing an overall rapid floating filtration device according to an embodiment of the present invention.
Figure 2 is a block diagram showing the arrangement structure of the microbubble injection unit of the rapid floating filtration device according to an embodiment of the present invention.
Figure 3 is an enlarged view showing the microbubble injection unit of the rapid floating filtration device according to an embodiment of the present invention.
Figure 4 is a block diagram showing a coarse bubble injection unit of the rapid floating filtration device according to an embodiment of the present invention.
Figure 5 is a block diagram showing the operating state of the rapid floating filtration device according to an embodiment of the present invention.
6 is a cross-sectional view showing an enlarged configuration of the filtering unit of the rapid floating filtration device.

Hereinafter, with reference to the accompanying drawings will be described in detail for the implementation of the present invention. In the description of the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as matters that are obvious to those skilled in the art with respect to known functions related to the present invention, a detailed description thereof will be omitted.

The present invention relates to a rapid floating filtration device, and a vortex is generated by microbubbles sprayed in the tangential direction of a cylindrical filtration tank, so that fine contaminants are agglomerated in the form of bubbles, which are adsorbed by coarse bubbles rapidly rising from the bottom of the filtration tank. In order to perform the flotation treatment at a high speed, it is composed of a main component including a microbubble injection unit 10, a coarse bubble injection unit 20, a scum treatment unit 30, a filtration unit 40, and a drain unit 50. .

1 is a block diagram showing the overall configuration of a rapid floating filtration device according to an embodiment of the present invention, Figure 2 is a plan view showing the arrangement structure of the microbubble injection unit of the rapid floating filtration device. 3 is an enlarged view of the microbubble injection unit of the rapid floating filtration device.

In the microbubble spraying unit 10 according to the present invention, when the microbubbles are injected in the tangential direction of the filtration tank 100 in which wastewater is stored, a vortex, that is, a vortex by centrifugal force is generated in the entire wastewater stored in the filtration tank 100, nitrogen, Microcontaminants including phosphorus and suspended solids are rapidly agglomerated with air bubbles in the vortex flow, causing them to float upward.

In the drawing, the microbubble spraying unit 10 is shown in a state in which three are disposed at symmetrical positions on both sides of the lower side of the filter tank 100, but the configuration is not limited thereto and may be disposed at equal intervals of 90° and 120°.

In addition, the microbubble spraying part 10 includes a cylindrical part 12, a conical part 14 which is connected to the cylindrical part 12 and has a spray hole 14a formed at an end thereof, and the cylindrical part 12 It is installed in the tangential direction and consists of an inlet pipe 16 connected to the pump 16a. Accordingly, the microbubbles supplied through the bubble generating pump 16a as shown in FIG. 3 (a) move to the cylindrical portion and the cone portion while rotating along the tangential direction of the cylindrical portion 12 through the inlet pipe 16, and the swirling flow The microbubbles collide with the inner walls of the cylindrical portion 12 and the cone portion 14 by the centrifugal force of and are finely divided and injected into the filtration tank 100 at high speed while passing through the spray hole 14a with a narrow cross-sectional area.

The injection direction of the injection hole 14a is made in a tangential direction of the inner wall of the filter tank 100 as shown in FIG. 2, so that when the microbubbles are injected, the entire wastewater stored in the filter tank 100 is swirled by the injection force. Allow eddy current to occur. As a result, the collision rate with microbubbles increases and decreases, and fine pollutants including nitrogen, phosphorus and suspended matter contained in wastewater easily react with microbubbles due to the increase in pressure and agglomerate in the form of bubbles, and the concentration of oxygen in the wastewater is increased to be treated. When discharged in water, the natural purification ability is improved.

3 (b) shows another embodiment of the microbubble injection unit in the rapid floating filtration device, wherein a Venturi pipe 18 is installed between the inlet pipe 16 and the pump 16a, and the Venturi pipe ( In the straight pipe of 18), an injection port 18b for supplying air to the constricted isthmus part 18a is formed. At this time, the pump 16a is connected to the water tank A and the chemical liquid tank B as shown in FIG. 1 to selectively supply either water or a chemical liquid.

Air and liquid (water or chemical liquid) are efficiently mixed by pressure change while passing through the narrow pipe part 18a of the Venturi pipe 18, and the liquid and microbubbles thus created are passed through the inlet pipe 16 through the cylindrical part ( 12) It is supplied inside.

The water used in the micro-bubble spraying unit may be configured to recycle the treated water discharged through the treated water discharge pipe 49, which will be described later, and the chemical liquid injected instead of water includes a deodorant liquid and a surfactant depending on the pollution level of wastewater. Drugs are selectively injected.

4 is a plan view of a coarse bubble spraying part of the rapid floating filtration apparatus provided by the present invention, in which coarse bubbles are sprayed from the bottom of the filtration tank 100 at the lower side of the filtration tank 100 to adsorb and float bubbles aggregated by microbubbles. For the coarse bubble injection portion 20 is formed.

2 and 4, the coarse bubble injection unit 20 is connected to the main pipe 22 connected to the coarse bubble generating blower 22a, and the main pipe 22 so that the coarse bubbles are removed from the bottom of the filtration tank 100. A distribution pipe 24 in which a plurality of discharge ports 24a are formed to eject, and a diffusion hole 26a is formed to disperse coarse bubbles to the entire area of the filter tank 100 by being installed above the distribution pipe 24 It comprises a plate (26).

In FIG. 1, the distribution pipe 24 of the coarse bubble injection unit 20 is disposed under the microbubble injection unit 10, and bubble diffusion between the microbubble injection unit 10 and the coarse bubble injection unit 20 The plate 26 is installed to divide the lower area of the filtration tank 100 into an independent space. That is, when a eddy current is generated in the upper region of the bubble diffusion plate 26 and the coarse bubbles are sprayed through the distribution pipe 24 in the lower region of the bubble diffusion plate 26, the coarse bubbles are formed in the bubble diffusion plate 26 as shown in FIG. It is dispersed to the entire area of the bottom of the filtration tank 100 while passing through the diffusion hole 26a by buoyancy and suddenly rises.

At this time, the rapidly rising coarse bubbles are adsorbed while colliding with the agglomerates in the form of bubbles agglomerated in the microbubbles by the vortex and are treated at a high speed, so that the wastewater treatment time is greatly shortened and the aggregation efficiency is remarkably improved.

The scum treatment unit 30 according to the present invention is provided with a rotary scraper 32 to remove the scum floating above the surface of the wastewater from the top of the filtration tank 100 by pushing it toward the scum discharge pipe 31. The scum discharge pipe 31 is installed in a transverse direction at a position corresponding to the waste water surface to form an opening at the top, and the rotary scraper 32 rotates through the upper opening of the scum discharge pipe 31 while rotating along the waste water surface. It is provided to have a radius.

Accordingly, the bubble-shaped floating material that is rapidly raised together with the coarse bubbles sprayed from the coarse bubble spraying unit 20 and generated on the wastewater surface is collected by the rotary scraper 32 and is passed through the scum discharge pipe 31 to the outside of the filtration tank 100. It is discharged.

6 is a cross-sectional view showing an enlarged configuration of the filtering unit of the rapid floating filtration device, and a filtering unit 40 for filtering and discharging the wastewater from which the suspended matter has been removed is provided in the center of the filtering tank 100. The filtration unit 40 is a screen tube 42 for primary filtration of wastewater, a backwash tube 44 disposed to pass through the center of the screen tube 42, and the screen tube 42 is tightly inserted inside the screen tube 42 A fiber filter 46 for secondary filtering the primary filtered wastewater, a storage tank 48 in which the treated water passed through the fiber filter 46 is accommodated, and one end is connected to the bottom of the storage tank 48, and the other end It comprises a treated water discharge pipe 49 extending to the outside of the filtration tank 100.

Here, the screen tube 42 is a filtering member for filtering foreign substances by intersecting wire strands to form fine pores, passing treated water through the pores between the wires, and filtering foreign substances, and is formed in a hollow tube shape. , The backwash tube 44 is connected to the upper part, and the fiber filter material 46 is filled inside.

In addition, a mesh plate 47 is installed between the screen tube 42 and the storage tank 48 so that the filtered wastewater while passing through the screen tube 42 and the fiber filter 46 is smoothly collected into the storage tank 48. .

When the screen tube 42 and the fiber filter material 46 are clogged or blocked by solids due to long use, a washing liquid containing treated water is injected through the back tubing tube 44 to provide the screen tube 42 and fiber filter material ( 46) Remove and wash contaminants in the form of adsorbed solids.

Accordingly, the wastewater from which the fine contaminants are flocculated and removed in the filtration tank 100 is permeated from the outer circumferential surface of the screen tube 42 to the inside by water pressure, passes through the fibrous filter 46, and is subjected to double filtration treatment in the first and second stages. Since the wire screen tube 42 is disposed vertically from the center of the filtration tank 100 in a cylindrical tube structure, the filtration area is enlarged and the inside of the filtration tank 100 is equal to the amount of treated water discharged through the filtration unit 40. It is possible to continuously perform filtration by replenishing the furnace wastewater (e.g., installing a sensor in the filtration tank 100 and adding additional wastewater when the control unit detects the wastewater level below the set water level).

At this time, the wastewater may be configured to form a wastewater inlet at one side of the filtration tank 100 or to connect a wastewater input pipe to the microbubble spraying unit 10 to mix and inject the microbubbles together.

In addition, the drain unit 50 according to the present invention is provided to collect and discharge coarse pollutants deposited on the bottom of the filtration tank 100. As for the drain part 50, a conical hopper part 52 is formed at the bottom of the filtration tank 100 as shown in FIG. 5, and a drain pipe 54 is connected to the bottom of the conical hopper part 52, so that the specific gravity of the conical hopper part 52 When this high coarse pollutant is precipitated and collected, the valve 56 of the drain pipe 54 is intermittently opened to collect and process the precipitated coarse pollutant to the outside.

On the other hand, the microbubble injection unit 10 and the coarse bubble injection unit 20 are provided to be operated on/off by a control unit, and when wastewater is stored in the filtration tank 100, the microbubble injection unit 10 is first operated. Contaminants are contaminated in the microbubbles while vortexing is generated during the set time, and then the coarse bubble spraying unit 20 is turned on and the coarse bubbles rapidly rise and the flocculation process is carried out step by step. At this time, the operating time of the microbubble injection unit 10 is provided to be adjusted by the control unit in consideration of the degree of wastewater pollution.

The rapid floating filtration device constructed as described above generates vortex by microbubbles sprayed in the tangential direction of the filtration tank, so that fine pollutants including nitrogen, phosphorus and suspended matter contained in wastewater easily react with microbubbles due to collision and pressure rise. As a result, it is agglomerated in the form of bubbles, and the bubble-shaped agglomerates are adsorbed by the coarse bubbles rising from the bottom of the filtration tank and floated at a high speed.Therefore, the coagulation efficiency is high, and the wastewater treatment time is shortened, thereby greatly improving the filtration efficiency of wastewater.

As described above, the most preferred embodiments of the present invention have been described in the detailed description of the present invention, but various modifications may be made within the scope of the technical scope of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but the scope of protection should be recognized from the techniques of the claims to be described later and equivalent technical means from these techniques.

10: microbubble injection part 12: cylindrical part
14: cone 14a: spray hole
16: inlet pipe 16a: pump
18: Venturi tube 18a: isthmus
18b: injection port 20: coarse bubble injection part
22: main pipe 22a: pump
24: distribution pipe 24a: discharge port
26: bubble diffusion plate 26a: diffusion hole
30: scum processing unit 31: scum discharge pipe
32: scraper
40: filter unit
42: screen tube 44: reverse tubing
46: fiber filter material 47: mesh plate
48: reservoir 49: discharge pipe
50: drain part
52: conical hopper part 54: drain pipe
56: valve 100: filtration tank
A: Water tank B: Chemical liquid tank

Claims (5)

Microbubble spraying unit provided to coagulate fine pollutants into bubbles by injecting microbubbles in the tangential direction of the inner wall of the filtration tank 100 in which wastewater is stored to generate vortex by centrifugal force in the entire wastewater stored in the filtration tank 100 (10);
A coarse bubble spraying unit 20 provided to adsorb and float bubbles aggregated by microbubbles by spraying coarse bubbles from the bottom of the filtration tank 100;
A scum treatment unit 30 provided with a rotary scraper 32 to remove the scum floating above the wastewater surface from the top of the filtration tank 100 by pushing it toward the scum discharge pipe 31;
Consisting of a configuration comprising a screen tube 42 having a hollow tube shape with a hollow inside and fine pores formed therein, and a fibrous filter 46 for secondary filtration of wastewater that has been densely inserted into the screen tube 42 and filtered first. , A filtering unit 40 disposed vertically in the center of the filtering tank 100 to filter and discharge wastewater from which fine pollutants have been removed; And
Includes; a drain unit 50 provided to collect and discharge coarse pollutants deposited on the bottom of the filtration tank 100,
The microbubble spraying part 10 is connected to the cylindrical part 12, the cylindrical part 12, and the conical part 14 having the injection hole 14a formed at the end thereof, and in the tangential direction of the cylindrical part 12. It is installed and consists of an inlet pipe 16 connected to the pump (16a),
The microbubbles are subdivided through the cylindrical part 12 and the conical part 14 while rotating along the tangential direction of the cylindrical part 12 through the inlet pipe 16, and pass through the injection hole 14a with a narrow cross-sectional area. It is sprayed into the filtration tank 100 at high speed,
The coarse bubble injection unit 20 includes a main pipe 22 connected to the coarse bubble generating blower 22a, and a plurality of discharge ports 24a connected to the main pipe 22 to eject coarse bubbles from the bottom of the filtration tank 100. ) Is formed, and a bubble diffusion plate 26 which is installed on the top of the distribution pipe 24 and has a diffusion hole 26a formed to distribute coarse bubbles to the entire bottom of the filter tank 100. ,
In the upper area of the bubble diffusion plate 26, micro-contaminants easily react with the micro-bubbles to agglomerate in the form of bubbles, and the bubble-shaped agglomerates rapidly rise through the distribution pipe 24 in the lower area of the bubble diffusion plate 26. Rapid flotation filtration device, characterized in that it is configured to be adsorbed by the coarse bubbles to be processed at a high speed.
The method of claim 1,
The scum discharge pipe 31 is installed in a transverse direction at a position corresponding to the wastewater surface to form an opening at the top, and the rotary scraper 32 rotates through the upper opening of the scum discharge pipe 31 while rotating along the wastewater surface. Rapid flotation filtration device, characterized in that configured to have a radius.
The method of claim 1,
The inlet pipe 16 is connected to a venturi pipe 18 having a narrow isthmus pipe portion 18a formed therein,
The other end of the venturi pipe 18 is connected to the pump 16a to supply fluid,
An injection port 18b for supplying air is formed in the narrow tube portion 18a in the straight tube of the Venturi tube 18,
Rapid flotation filtration device, characterized in that the air and fluid are configured to be mixed when passing through the isthmus (18a) of the venturi tube (18) to generate microbubbles.
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