KR101771777B1 - Diffuser - Google Patents

Abstract

The present invention is characterized in that it comprises a tube-shaped diffuser pipe and a plurality of diffuser holes, said diffuser holes being formed along the flow direction on the diffuser pipe, the diffuser pipe having an inlet portion into which air is introduced and a distal portion And the cross-sectional area of the inlet portion is larger than the cross-sectional area of the distal portion.

Description

Buy Agency {DIFFUSER}

The present invention relates to an air diffuser. More specifically, the present invention relates to an acid furnace capable of blocking sludge accumulation and clogging.

In the case of submerged membrane modules, air must be continuously pumped through the surface to remove contaminants from the surface to prevent contamination of the microbial reactant tank or raw water tank from sticking to the membrane surface and degrading filtration performance. In this case, an air distributor or the like is installed below the membrane cassette, and air is injected to perform membrane cleaning. Usually, the air distributor has a circular pipe shape, and a plurality of hollows are punched at regular intervals to distribute the air evenly throughout the membrane.

In recent years, air distributors and aerator have been designed separately in an effort to reduce the energy required for membrane cleaning. Korean Patent Publication No. 2012-0083374 discloses a gas sparger used in a membrane bio-reactor (MBR), and US2011 / 0198283 discloses a Mem-pulse. These patents can dramatically reduce the amount of air injected. However, if the amount of air injected is reduced, the size of the air distributor and the size of the plurality of openings in the air distributor must also be reduced. Therefore, when the air gap during the resting period is blocked by the contaminants and the air is not uniformly distributed, Can be accumulated. Also, although a technique of using independent air injection pipes for each of the aerator has been developed, the above technique has a disadvantage that the structure is complicated and maintenance is difficult.

In order to remove hollow contaminants, various types of air diffuser designs have been studied. Among them, there is a diffuser design including an air diffuser which distributes air and a manifold that distributes air to a plurality of diffuser pipes. However, according to the existing engine design, the sludge clogging phenomenon of the acidic pipe is large as the operation condition is closer to the air injection part, and the drying of the sludge progresses greatly toward the end of the acidic pipe, There is a problem that clogging can not be avoided. Also, in the vent process, the sludge in the membrane tank moves to the acid manifold, which causes the problem of sludge drying in the entire air injection pipe.

An object of the present invention is to provide an air diffuser capable of evenly distributing the air amount.

Another object of the present invention is to provide an air diffuser capable of preventing clogging and back flow of sludge.

Another object of the present invention is to provide an acid furnace capable of increasing the cleaning efficiency and shortening the cleaning time.

The above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the present invention relates to an air diffuser.

According to one embodiment, the diffuser of the present invention comprises a tube-shaped diffuser pipe and a plurality of diffuser holes, the diffuser holes being formed along the flow direction on the diffuser pipe, And an end portion opposed to the inlet portion, wherein a cross-sectional area of the inlet portion is larger than a cross-sectional area of the distal portion.

According to another embodiment, the cross-sectional area of the inlet may be 0.1% to 10000% greater than the cross-sectional area of the distal end.

According to another embodiment, the size of the diffuser hole may increase or decrease from the inlet portion to the distal portion.

According to another embodiment, the center of the cross-sectional area of the inlet portion of the diffuser pipe may be lower than the cross-sectional center of the distal portion.

According to another embodiment, the hole center height of the diffuser hole may be increased from the inlet portion to the distal portion.

According to another embodiment, the diffuser may have a plurality of diffuser pipes arranged in parallel, and the inlet of the plurality of diffuser pipes may be connected by a manifold.

According to another embodiment, the manifold may have a cross-sectional area of the injection portion into which the air is injected, which is smaller than the cross-sectional area of the end portion opposed thereto.

According to another embodiment, the cross-sectional area of the end portion of the manifold may be 0.1% to 10000% larger than the cross-sectional area of the injection portion.

According to another embodiment, the cross-sectional area of the inlet portion of the diffuser pipe may increase from the injection portion to the end portion of the manifold.

According to another embodiment, the manifold may be equipped with a unidirectional fluid valve which allows only air in the air diffusing pipe to be discharged to the outside and the sludge not to flow back into the injection section.

According to another embodiment, the air diffuser may further include an aerator including an air retention chamber at the top of the diffuser.

According to another embodiment, the aerator includes a housing defining an inner cavity, the housing including at least one sidewall and an upper surface portion connected to the at least one sidewall, a first cavity formed in the inner cavity and extending from a lower end to an upper end, A first partition wall defining a first cavity and a second cavity, and a second chamber formed between the first partition and the first sidewall in the inner cavity and extending from the top to the bottom to form a first chamber and a second chamber of the second cavity, Wherein the housing includes an inlet opening communicating with the first cavity and an outlet opening communicating with the second chamber, wherein an upper end of the first partition is spaced apart from the upper portion, Wherein the first cavity and the second cavity communicate with each other via the first opening, an upper end of the second partition is connected to the upper surface portion, Group a first chamber and a second chamber that has a structure in communication with each other at the bottom of the lower portion of the second partition wall, there is the air diffusing pipe to the first hollow portion of the housing to discharge the air.

The air diffuser of the present invention has the effect of eliminating the clogging of the sludge by making the flow rate uniform by making the amount of air discharged from the diffuser holes uniform, increasing the cleaning efficiency and shortening the time.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 schematically depicts a diffuser according to one embodiment of the present invention.
2 schematically shows a diffuser according to another embodiment of the present invention.
3 schematically shows a diffuser according to another embodiment of the present invention.
4 schematically shows a diffuser according to another embodiment of the present invention.
5 schematically shows a diffuser according to another embodiment of the present invention.
Figure 6 is a simplified view of a diffuser according to another embodiment of the present invention.
Figure 7 is a simplified view of a diffuser according to another embodiment of the present invention.
Figure 8 is a simplified illustration of a diffuser according to another embodiment of the present invention.
9 is a simplified illustration of an aerodrome associated with an aerator in accordance with one embodiment of the present invention.

In the present invention, the 'inlet' is the starting point for the introduction of air on a straight pipe, and the 'end' is the same line as the 'inlet'.

The 'injection part' is the start part where the air flows on a straight line, and the 'end part' is the same part as the 'injection part'.

In the present invention, the 'cross-sectional area' is defined as 'the width of the cross-section perpendicular to the longitudinal direction'.

In the present invention, 'center of cross section' is defined as 'center of gravity of cross section perpendicular to the longitudinal direction'.

In the present invention, the 'hole center' is defined as 'the center of gravity of the aperture hole'.

In the present invention, 'track type' is defined as 'a figure formed by connecting a semicircle facing a cut part with a straight line'.

Embodiments of the present application will now be described in more detail with reference to the accompanying drawings. However, the techniques disclosed in the present application are not limited to the embodiments described herein but may be embodied in other forms.

It should be understood, however, that the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the width, thickness, and the like of the components are enlarged in order to clearly illustrate the components of each device. Also, while only a portion of the components is shown for convenience of explanation, those skilled in the art will readily recognize the remaining portions of the components.

When an element is described at the point of view of the general description of the drawings and an element is referred to as being located on or under another element, it is to be understood that the element may be directly on or under another element, Quot; can be intervened. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. In the drawings, the same reference numerals denote substantially the same elements. Particularly, in order to more easily understand the invention in the drawings, the cross-sectional area of the aeration pipe and the manifold is shown as a circle, but an ellipse, a track, a triangle, a rectangle, a pentagon, a hexagon or an inverted U- no.

It should be understood, however, that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise, and the terms "comprise" Acts, components, parts, or combinations thereof, but does not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof It should be understood that it does not.

Hereinafter, the present invention will be described in detail.

One aspect of the present invention is to provide a diffuser. Specifically, the diffusing pipe includes a tube-shaped diffuser pipe and a plurality of diffuser holes, the diffuser holes being formed along the flow direction on the diffuser pipe, the diffuser pipe having an inlet portion into which air flows, And a cross-sectional area of the inlet portion is larger than a cross-sectional area of the distal portion.

1 schematically illustrates an acid engine 10 according to one embodiment of the present invention.

Specifically, the cross-sectional area of the inlet portion 110 of the diffuser pipe 100 of the aeration engine 10 is larger than the cross-sectional area of the distal portion 120. In an embodiment, the diffuser pipe 100 of the diffuser 10 is configured such that the cross-sectional area of the inlet 110 is 0.1% to 10000%, preferably 0.1% to 8000%, more preferably 0.1% 5000%. In the above range, there is an advantage that the amount of air discharged from the air diffuser hole 150 is uniform by adjusting the pressure of the air to be introduced.

The diffuser pipe (100) may be in the form of a tube having the diffuser hole (150). The sectional shape of the diffuser pipe 100 may be circular, elliptical, track, triangular, square, pentagonal, hexagonal or inverted U-shaped. Of these, a circular shape is preferable, but not always limited thereto. In addition, the cross-sectional shape of the diffuser pipe 100 may be different from the inlet 110 to the distal end 120.

The shape of the diffuser hole 150 can be circular, oval, star, track, triangle, square, pentagonal or hexagonal. Of these, a circular shape is preferable, but not always limited thereto. The shape of the acid orifice (150) may be used in combination of two or more. The position of the diffuser hole 150 may be formed along the longitudinal direction of the diffuser pipe 100 and may be formed on both sides of the diffuser pipe 100. At this time, the position of the diffuser hole 150 may be formed in a zigzag shape symmetrically or non-symmetrically with respect to both sides of the diffuser pipe 100, but is not limited thereto.

2 schematically illustrates an air diffuser 20 according to another embodiment of the present invention.

According to a specific example, the diameter of the diffuser hole 150 of the diffuser 20 may increase or decrease in size from the inlet 110 to the distal end 120. 2 (a) schematically shows a specific example in which the size of the diffuser hole 150 decreases from the inlet 110 to the distal end 120, and FIG. 2 (b) Is increased from the inlet 110 to the distal end 120, as shown in FIG.

In the specific example The ratio of the size of the diffuser hole 151 at the entrance 110 to the size of the diffuser aperture 152 at the distal end 120 is 1:50 to 50: 1, preferably 1:40 to 40: 1, more preferably 1: : 30 to 30: 1. There is an advantage that the amount of air discharged in the above range becomes uniform.

3 schematically shows an air diffuser 30 according to another embodiment of the present invention.

Specifically, the diffuser pipe 100 of the aeration unit 30 may have a cross-sectional area center 115 of the inlet 110 that is lower than a cross-sectional area center 125 of the distal section 120. The difference in height between the center of the cross-sectional area 115 of the inlet 110 and the cross-sectional center 125 of the distal end 120 may be 0.1 mm to 500 mm, preferably 0.1 mm to 480 mm, more preferably 0.1 mm to 450 mm. There is an advantage that the amount of air discharged in the above range becomes uniform.

4 schematically illustrates an oxidant tube 40 according to another embodiment of the present invention.

Specifically, the hole center 150 of the air diffusing pipe 40 can be increased from the inlet 110 to the distal end 120. The difference in center height between the center of the diffuser hole 151 at the inlet 110 side and the diffuser hole 152 at the distal end 120 side is 0.1 mm to 50 mm, preferably 0.1 mm to 48 mm, Lt; / RTI > There is an advantage that the air discharge of the air diffuser hole is uniform in the above range.

5 schematically shows a diffuser 50 according to another embodiment of the present invention.

Specifically, the air diffuser (50) includes a plurality of diffuser pipes (100) arranged in parallel, and the manifold (300) can be coupled to the inlet section (110) side of the plurality of diffuser pipes (100).

Each of the inlet portions 110 of the plurality of diffuser pipes 100 may be connected to the manifold 300. The air diffuser 50 includes a manifold 300 so that one air inlet can inject air into one or more diffuser pipes 100 and also one or more diffuser holes 150 .

The shape of the cross-sectional area of the manifold 300 may be circular, elliptical, track, triangular, rectangular, pentagonal, hexagonal, or inverted U-shaped. In addition, the cross-sectional shape of the manifold 300 may be different from that of the injection part 310 and the end part 320.

Also, the manifold 300 and the diffuser pipe 100 may be joined together at an angle. In embodiments, manifold 300 and diffuser pipe 100 may be joined at an angle of 20 degrees to 90 degrees, preferably 25 degrees to 90 degrees, more preferably 30 degrees to 90 degrees.

6 schematically shows an air diffuser 60 according to another embodiment of the present invention.

Specifically, the cross-sectional area of the air diffuser (310) may be smaller than the cross-sectional area of the tip (320). The cross sectional area of the end portion 320 may be 0.1% to 10000%, preferably 0.1% to 8000%, more preferably 0.1% to 5000%, more than the cross sectional area of the injection portion 310. There is an advantage that the air pressure introduced into the diffusion pipe 100 is uniformized by controlling the pressure of the air introduced in the above range.

7 schematically illustrates an aeration engine 70 according to another embodiment of the present invention.

Specifically, the cross-sectional area of the inlet portion 110 of the diffuser pipe 100 of the aeration unit 70 can be increased from the injection portion 310 to the end portion 320 of the manifold 300. The cross-sectional area of the inlet 112 on the end 320 of the manifold 300 is preferably 0.1% to 10000% of the cross-sectional area of the inlet 111 on the inlet 310 side of the manifold 300 0.1% to 8000%, more preferably 0.1% to 5000%. In the above range, there is an advantage that the pressure of the air distributed to the diffuser pipe 100 is adjusted to uniform the amount of air discharged from the diffuser hole 150.

8 schematically illustrates an aeration engine 80 according to another embodiment of the present invention.

Specifically, the air diffuser (80) may be equipped with a one-way fluid valve (500) for discharging only the air in the air diffuser (80) to the manifold (300) injecting part (310) and preventing the sludge from flowing backward. By installing the unidirectional fluid valve 500, clogging of the sludge can be minimized, thereby increasing the cleaning efficiency and shortening the cleaning time. The unidirectional fluid valve 500 can use a ball or an O-ring at the sealing portion to reliably prevent reverse flow and use both without gas or liquid, and can use a valve suitable for pressure and port size.

Figure 9 is a simplified view of an aerodrome associated with an aerator 700 in accordance with another embodiment of the present invention.

The air diffuser of the present invention is located at the lower end of the membrane and can discharge air to clean the membrane. In this case, the cleaning efficiency can be further improved by being positioned directly at the bottom of the membrane or by combining with the aerator 700.

The aerator 700 holds and discharges a certain amount of bubbles discharged from the diffuser hole 150, thereby achieving high efficiency cleaning and low energy.

The aerator 700 may be installed on the diffuser to collect bubbles discharged from the diffuser hole 150.

For example, the aerator 700 may form an internal cavity 730 and may include at least one sidewall 722A, 722B, 724 and an upper surface 725 coupled to the at least one sidewall 722A, 722B, A first partition wall 740 formed in the inner cavity 730 and extending from the lower end 744 to the upper end 752 to form a first cavity 732 and a second cavity 734; And an inner cavity 730 formed between the first partition 740 and the first sidewalls 722A and 722B and extending from the upper end 742 to the lower end 744 to define the second cavity 734 And a second bulkhead 750 defining a first chamber 736 and a second chamber 738. The housing includes an inlet opening 760 in communication with the first cavity 732 and a second bulkhead 750, And an outlet opening 762 communicating with the chamber 738. The upper end 742 of the first partition 740 is spaced apart from the upper surface 725 to form a first opening, The upper portion 752 of the second partition 750 is connected to the upper surface portion 725 and the first chamber 732 and the second cavity portion 734 communicate with each other through the first opening portion, 736 and the second chamber 738 communicate with each other under the lower end 754 of the second partition 750 and the air diffusing pipe 730 is connected to the first cavity 732 of the housing by air .

FIG. 9 shows an air diffuser 10 as one embodiment of the present invention, but is not limited thereto.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. However, the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

Example

Example 1

Size to prepare a 9.6mm ² of the acid group-hole 8 has, 93cm length of the diffuser section inlet pipe cross-sectional area 534mm ² and a distal end cross-sectional area 194.4% greater aeration 181.4mm ² to the inlet cross-sectional area than the distal cross-section. (Fig. 1)

Example 2

Size having a 9.6mm hole ² in group 8, a 93cm length of the diffuser pipe inlet cross-sectional area 534 mm ² and a distal end cross-sectional area 181.4 mm ² was the inlet cross-sectional area 194.4% greater than the distal cross section, said air diffuser pipe 7 the inlet cross-sectional area 2460mm ^2, the end portion having a diffuser coupled to 17.4% greater, than the cross-sectional area manifold of 62.4cm length 2887 mm ² with the tip end portion a cross section of the injection cross-section was produced. (1 + 5)

Example 3

The same diffuser as in Example 2 was fabricated except that the ratio of the size of the diffuser to the size of the diffuser was 1: 1.3.

Example 4

The same orifice as in Example 2 was manufactured in addition to the fact that the height of the center of the hole of the diffuser portion of the diffuser pipe was 5mm less than the height of the center of the hole portion of the diffuser portion.

Example 5

The same orifice as in Example 2 was manufactured, except that the cross-sectional area of the end portion of the manifold was 100% larger than the cross-sectional area of the injection portion.

Example 6

The same orifice as in Example 2 was manufactured, except that the cross-sectional area of the inlet of the diffuser at the end of the manifold was 1% larger than the cross-sectional area of the inlet of the diffuser at the inlet of the manifold.

Comparative Example 1

The same orifice as in Example 1 was manufactured, except that the cross-sectional area of the acid pipe was constant at 344.8 mm ² .

Comparative Example 2

The same orifice as in Example 2 was manufactured, except that the cross-sectional area of the aeration pipe was 344.8 mm ² and the cross-sectional area of the manifold was 2730 mm ² .

How to measure

Example 1 and Comparative Example 1

And the injection hole pressure was set to 0.4 bar, and the name of the outlet hole was sequentially arranged from the inlet to the end of the outlet pipe in order of the first outlet hole, the second outlet hole, the third outlet hole, the fourth outlet hole, 6th, 6th, 6th, 6th, 6th, 6th, 6th, 6th, 6th, 6th, Min, and the amount thereof was measured. The maximum difference (Max-Min) and the standard deviation between the maximum value and the minimum value are calculated and are shown in Table 1 below.

Examples 2 to 6 and Comparative Example 2

When the inlet air pressure is 0.4 bar and the first to fourth diffuser pipes, the third diffuser pipe, the third diffuser pipe and the fourth diffuser pipe are sequentially disposed from the injection part to the end part of the manifold, The amount of bubbles discharged from the first diffuser hole (A) of the first diffuser pipe, the eighth diffuser hole (B) of the first diffuser pipe, the first diffuser hole (C) of the seventh diffuser pipe and the eighth diffuser hole (D) Was collected for 1 minute and the amount thereof was measured. The maximum difference (Max-Min) and the standard deviation between the maximum value and the minimum value are calculated and are shown in Table 2 below.

First anchor hole Fourth Mountain Hole 8th Mountain Hole Maximum difference
(Max-Min) Standard Deviation Example 1 11050 L 10080 L 9040 L 2010 820.7 Comparative Example 1 12806 L 10020 L 7500 L 5306 2167.1

(A) (B) (C) (D) Maximum difference
(Max-Min) Standard Deviation Example 2 7070 L 7050 L 7200 L 7110 L 150 L 57.6 Example 3 7110 L 7090 L 7300 L 7205 L 210 L 83.6 Example 4 6820 L 6760 L 7100 L 7005 L 640 L 137.1 Example 5 7010 L 6950 L 7400 L 7113 L 450 L 172.8 Example 6 6940 L 6860 L 7250 L 7098 L 390 L 149.9 Comparative Example 2 6700 L 5500 L 8300 L 7100 L 1600 L 1000

As shown in Tables 1 and 2, in Examples 1 to 6, the maximum difference (Max-Min) and the standard deviation were small regardless of the amount of collected bubbles, whereas Comparative Examples 1 and 2 were collected It can be seen that the maximum difference (Max-Min) and the standard deviation are large depending on where the bubble amount is collected.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. As will be understood by those skilled in the art. It is to be understood, therefore, that the embodiments described above are intended to be illustrative in all respects and not restrictive.

10, 20, 30, 40, 50, 60, 70, 80:
100: aeration pipe 110. 111. 112: inlet part
115: inlet portion cross-sectional area center 120:
125: Center cross-sectional area center 150, 151, 152:
300: manifold 310: injection part
320: End 500: One way fluid valve
700: Aerator

Claims (12)

A tube-shaped diffuser pipe and a plurality of diffuser holes,
Wherein said diffuser holes are formed along the flow direction on said diffuser pipe,
Wherein the diffuser has an inlet portion through which air is introduced and a distal portion opposite thereto,
The cross section of the inlet section is larger than the cross section of the distal section,
Wherein the diffuser pipe has a plurality of diffuser pipes arranged in parallel, the inlet of the plurality of diffuser pipes being connected to the manifold,
Wherein the manifold has a cross-sectional area of an injection portion into which air is injected is smaller than a cross-sectional area of an end portion thereof opposed thereto.
2. The diffuser as claimed in claim 1, wherein the cross-sectional area of the inlet portion is 0.1% to 10000% larger than the cross-sectional area of the distal portion.
2. The diffuser as claimed in claim 1, wherein the size of the diffuser hole increases or decreases from the inlet portion to the distal portion.
The diffusing pipe according to claim 1, wherein the diffuser pipe has a center of sectional area of the inlet portion lower than a center of the sectional area of the distal portion.
2. The diffuser as claimed in claim 1, wherein the height of the hole center of the diffuser hole increases from the inlet portion to the distal portion.
delete delete 2. The diffuser as claimed in claim 1, wherein the cross-sectional area of the end portion of the manifold is 0.1% to 10000% larger than the cross-sectional area of the injection portion.
2. The diffuser as claimed in claim 1, wherein the inlet of the diffuser pipe has a cross-sectional area that increases from the inlet to the outlet of the manifold.
2. The diffuser as claimed in claim 1, wherein the manifold is equipped with a unidirectional fluid valve in the injection section.
11. A diffuser as claimed in any one of claims 1 to 5 and 8 to 10, further comprising an aerator including an air retention chamber at the top of the diffuser.
The air conditioner according to claim 11,
A housing defining an inner cavity and including at least one side wall and an upper surface portion connected to the at least one side wall;
A first partition wall formed in the inner cavity and extending from a lower end to an upper end to form a first cavity and a second cavity; And
And a second partition wall formed in the inner cavity between the first partition and the first sidewall and extending from the top to the bottom to form a first chamber and a second chamber of the second cavity,
The housing including an inlet opening communicating with the first cavity and an outlet opening communicating with the second chamber,
Wherein an upper end of the first partition wall is spaced apart from the upper surface portion to form a first opening, the first cavity and the second cavity communicate with each other through the first opening,
Wherein the upper end of the second partition is connected to the upper surface portion and the first chamber and the second chamber communicate with each other at a lower portion of the lower portion of the second partition,
And the air diffuser discharges the air to the first cavity portion of the housing.

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