KR20090102975A - Circular type Air Injection Nozzles having Two Circular Slits and Filter Cleaning System using Them - Google Patents

Abstract

The present invention relates to an annular double slit injection nozzle for dust collection and a dust collection system for a filter dust collecting device using the same, in which a coanda effect is generated. More specifically, two cylindrical air jets are provided on an inner edge and an outer edge of the injection nozzle. When a slit is formed and sprayed compressed air at high speed through the slit, the injected air flows along the surface of the injection nozzle inner guide, and ambient air, which is several times as large as the amount of injected air, is collected from inside and outside of the injection nozzle. The present invention relates to an annular double slit injection nozzle for dust collection using a coanda effect for guided suction into a filter and a dust extraction system of a filter dust collecting device using the same.

Such a present invention has the feature of dramatically improving the performance of the dust removal system.

Description

Circular type air injection nozzles having two circular slits and filter cleaning system using them}

The present invention relates to an annular double slit injection nozzle for dust collection and a dust collection system for a filter dust collecting device using the same, in which a coanda effect is generated. More specifically, two cylindrical air jets are provided on an inner edge and an outer edge of the injection nozzle. When a slit is formed and sprayed compressed air at high speed through the slit, the injected air flows along the surface of the injection nozzle inner guide, and ambient air, which is several times as large as the amount of injected air, is collected from inside and outside of the injection nozzle. The present invention relates to an annular double slit injection nozzle for dust collection using a coanda effect for guided suction into a filter and a dust extraction system of a filter dust collecting device using the same.

In general, when dust is accumulated in the dust collecting filter of the dust collector for treating dust generated in various industrial processes, since the air resistance increases, the dust accumulated on the surface of the dust collecting filter is periodically removed. On the other hand, the impact air dust extraction method that is most commonly applied in such a filter dust collector to blow off the compressed air by instantaneous injection of compressed air from the injection nozzle to desorb dust attached to the filter surface.

Conventional techniques for the dust collecting filter dust extraction system and the vacuum air injection nozzle using such an impact air flow method, the application number 20-2005-16238 (name of the invention: dust collector dust removal system), and the application number 20-1997-26955 (invention) The name of the dust collecting nozzle of the dust collector and Application No. 20-1995-17896 (the name of the invention: air spray nozzle for cleaning the bag filter).

However, the nozzles used in the above-mentioned dust collecting filter dust collecting systems have disadvantages of excessive installation cost and difficult maintenance and repair due to complicated configuration or individual control.

For example, in the case of a dust collector dedusting system (Application No. 20-2005-16238), which is one of the technologies related to a conventional dust filter dedusting system, each nozzle is provided with an actuator and a packing, and the installation cost is excessive, Maintenance of each actuator and the like has a disadvantage of difficulty in maintenance.

The present invention has been made to solve the above problems, an object of the present invention is to collect the dust collecting filter annular double slit for dust extraction to improve the performance of the dust collection system and significantly improve the performance of the dust extraction system. The present invention provides a spray nozzle and a dust extraction system of a filter dust collector using the same.

An object of the present invention as described above, in the nozzle is mounted to the injection pipe of the dust collecting filter dust extraction system including a injection pipe is formed on one side and injects the air flowing through it, the first inlet hole of the injection pipe and An annular upper guide having a lower opening having two inlet holes formed on one side thereof, an annular lower guide provided at a lower portion of the upper guide and configured to rotate and extend a streamlined cross section, and a lower portion and a lower portion of the upper guide. Connect the upper part of the guide, the outer slit and the inner slit between the outer inner circumference of the upper guide and the outer circumference of the lower guide and between the inner inner circumference of the upper guide and the inner circumference of the lower guide are respectively formed, the upper guide It is configured to include a connecting portion for connecting the lower portion of the inside and the upper portion of the lower guide to form a gap And the dust-collecting filter exhaustion annular double slit injection nozzle for which,

In the dust collecting system of the filter dust collector using the annular double slit injection nozzle for dust collecting filter as described above, the dust collecting air storage container provided on the outside of the filter dust collecting device, and a plurality of inlet holes at equal intervals in the longitudinal direction It is formed and one side is mounted at equal intervals in the longitudinal direction of the dedusting air storage container and the other end is closed and penetrates the upper one side of the filter dust collector is located in the vertical upper portion of the dust collecting filter provided in the inside of the filter dust collector Including a discharge pipe, a plurality of control unit provided on the outside of the vacuum storage container, and one side is a vacuum control valve comprising a valve portion connected to the control portion and the other side is connected to one side of the plurality of injection pipes And a circular double slit injection nozzle for dust collection filter having two inflow holes corresponding to one inflow hole of the injection pipe Coupling of the pipe is in contact with the upper guide and the injection pipe of the injection nozzle and through the connecting member formed a connection hole protruding the upper and lower parts on one side so that the first inlet hole and the second inlet hole communicates, and is folded around the injection tube It is achieved by the dust extraction system of the filter dust collector using an annular double slit injection nozzle for dust collection filter, characterized in that the coupling coupled to the upper guide in the vicinity of the both sides of the connecting member by a clamp for welding.

According to the dust extraction system of the dust collecting filter annular double slit injection nozzle and the filter dust collecting device using the same, high dust removal performance can be obtained even by using a low pressure exhaust air due to the injection nozzle generating a coanda effect. As a result, it is possible to satisfy the energy cost reduction and increase the service life of the dust collecting filter and the dust collecting efficiency of the dust collector at the same time.

In addition, the dust collecting system of the dust collecting device using the annular double slit injection nozzle for dust collecting filter is externally controlled so that no separate repair process is required for the spray nozzle unless it is corroded or damaged. And also has the advantage of easy maintenance.

1 is a view showing a conventional bag filter for explaining the present invention,

2 is a cross-sectional view taken along line A-A of FIG.

3 is an exploded perspective view showing an annular double slit injection nozzle for dust collecting filter according to an embodiment of the present invention and a view showing a coupling relationship to the injection pipe,

4 is a coupling diagram of FIG. 3,

5 is a view showing a coupling relationship between the upper guide and the injection pipe according to an embodiment of the present invention,

Figure 6 is a view showing the flow of the dust collecting filter annular double slit injection nozzle and compressed air according to another embodiment of the present invention,

7 is a view showing various examples of the lower guide of the annular double slit injection nozzle for dust collection filter according to an embodiment of the present invention and another embodiment,

8 is a view showing an example of a coupling relationship between the upper guide and the lower guide,

9 is a view showing another example of the coupling relationship between the upper guide and the lower guide,

10 is a reference view showing a state in which the annular double slit injection nozzle for dust collection filter coupled to the injection pipe according to an embodiment of the present invention,

11 is an exploded perspective view of an annular double slit injection nozzle for dust collecting filter according to another embodiment of the present invention;

12 is an exploded cross-sectional view of an annular double slit injection nozzle for dust collecting filter according to another embodiment of the present invention;

13 is an exploded perspective view of an annular double slit injection nozzle for dust collecting filter according to another embodiment of the present invention;

14 is an example of the injection pipe of the dust collecting system of the dust collecting apparatus using the annular double slit injection nozzle for dust collecting filter according to an embodiment of the present invention,

15 is another example of the injection pipe of the dust collecting system of the dust collecting apparatus using the annular double slit injection nozzle for dust collecting filter according to another embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: bag filter 7: filter bag

9: injection tube 10: upper guide

20: lower guide 31: protruding pipe

41: welded part 42: pin

50: connecting member 61: dedusting air storage container

62: control unit 63: valve unit

65: control valve 70: fixing clamp

Hereinafter, prior to explaining the present invention, a filter dust collecting technique, an impact air dust exhausting method, and a coanda effect corresponding to the present invention will be described.

Filtration dust collecting technology is a technology for removing dust contained in the process gas by using a dust collecting filter. This dust collection technology requires a process of periodically removing dust accumulated on the surface of the dust collecting filter because dust increases in the dust collecting filter, which is called dust exhausting. In general, the dust collection method of the filter dust collection technology is a shock air dust exhausting method in which compressed air is blown out instantaneously by blowing compressed air, and a backwash air exhausted by blowing air in the direction opposite to the direction in which the processing gas passes through the dust filter. There is a dust extraction method, and a vibration extraction method that vibrates the dust collecting filter directly.

Here, the impact air dedusting device is typically a dedusting air storage container that can store compressed air for injection, a dedusting air control valve that can control the amount of compressed air transported from the dedusting air storage container when dedusting, and a dedusting air control It consists of a dedusting air injection pipe for delivering the compressed air transported through the valve to each dust collecting filter, and a dedusting air injection nozzle attached to the dedusting air injection pipe for injecting actual compressed air into the dust collecting filter.

In addition, the impact air dedusting method opens the dedusting air control valve for a very short moment of 0.2 seconds or less, and instantly blows the compressed air from the injection nozzle, and the airflow attracted from the surroundings due to the high-speed injection is directly inside the dust collecting filter. As a result, the dust is introduced into the dust collecting filter in a short time and the dust is attached to the surface of the dust collecting filter. There are various types of dust exhaust systems using the impact air exhaust system.

The Coanda effect is a physical phenomenon discovered by Henry Coanda that causes fluids ejected horizontally from the surface of the object to progress rapidly along the surface of the object, creating a low pressure distribution around it. Say the phenomenon.

In other words, this phenomenon appears that when the fluid is ejected through a thin slit, such as a capillary tube, it will bend along this surface if there is a curved wall near the outflow direction. For example, the lift of the plane is generated from the pressure drop on the upper surface caused by the Coanda effect of the upper and lower blades with different curvatures, and the reaction reaction between the airflow and the wing downwards at a higher speed. The case of an aircraft is mentioned.

Therefore, the Coanda effect can be utilized in various fields in addition to the aviation field, and is currently widely applied to various industrial fields such as exhaust and ventilation, wire laying, communication fiber laying, and large boiler washing.

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in detail.

The dust collecting device used in the present invention is a filter dust collecting device 100, as shown in Figure 1, the first dust collecting chamber (1) formed in the form of an inverted cone provided for collecting dust by inertial collision and centrifugal force, and the 1 The first dust collecting chamber provided with a gas inlet pipe 1 'connected to the tangential direction of the dust collecting chamber 1 and a plurality of dust collecting filters 7 for absorbing and filtering the dust passing through the first dust collecting chamber 1 ( Square dust collector (2) formed on the upper portion of 1), a fixed plate (3) for fixing the upper portion of the plurality of dust filters (7), and a gas exhaust pipe connected to the upper side of the dust collector (2) ( 2 '), a dust extraction system for separating dust attached to the dust collecting filter 7 inside and outside the dust collecting chamber 2, and dust separated from the dust collecting filter 7 by the dust collecting system. And it is configured to include a storage unit 4 for receiving the dust falling through the first dust collecting chamber (1),

Dust collecting filter annular double slit injection nozzle (hereinafter, the injection nozzle) according to the present invention is a conventional inlet hole (9 ') is formed on one side including a spray pipe (9) for injecting the air flowing through it It is a nozzle mounted to the injection pipe (9) of the dust collecting filter dust extraction system, the lower part formed with two inlet holes (10 ') on one side to correspond to the one inlet hole (9') of the injection pipe (9) Annular upper guide 10, an annular lower guide 20 provided below the upper guide 10 and configured to rotate and extend a streamlined section, and lower and lower guides of the upper guide 10. An upper portion of the upper portion 20 may be connected between the outer inner circumference of the upper guide 10 and the outer circumference of the lower guide 20, and between the inner inner circumference of the upper guide 10 and the inner circumference of the lower guide 20. Each of the outer slit L1 and the inner slit L2 is formed, and the inside of the upper guide 10 It is configured to include a connecting portion for connecting the gap (S) is formed on the lower portion and the upper portion of the lower guide 20.

3 and 4, the upper guide 10 has an annular structure in which the lower part is opened, and the upper guide 10 has two inlet holes to correspond to the one inlet hole 9 'of the injection pipe 9 at the upper part. 10 'is formed. Here, if a plurality of inlet holes 9 'of the injection pipe 9 are formed (for example, two), two inlet holes 10' formed at the upper portion of the upper guide 10 are also provided (2). Dog) should be formed, and if the two inlet holes 10 'are even, they should be formed to face each other. This is to secure the stably in consideration of the configuration in which the upper guide 10 is attached to the injection pipe 9. to be.

On the other hand, the upper guide 10 may further form a protruding tube 31 extending a predetermined length upward from the two inlet hole (10 '). The extension length of the protruding tube 31 is formed to be equal to the thickness of the one inlet hole 9 ′ of the injection tube 9 so that the upper guide 10 when the protrusion tube 31 is coupled to the injection tube 9 is provided. Is preferably in close contact with the lower side of the injection pipe (9).

The lower guide 20 is provided in the lower portion of the upper guide 10, the shape of which is formed by extending the streamlined cross section, and is connected to the upper guide 10 by a connecting portion. At this time, the outer slit (L1) and the inner between the outer inner circumference of the upper guide 10 and the outer circumference of the lower guide 20 and between the inner inner circumference of the upper guide 10 and the inner circumference of the lower guide 20, respectively It is preferable that the slit L2 is formed, and the gap S is formed at the lower portion of the upper guide 10 and the upper portion of the lower guide 20 to be connected.

Here, the outer slit (L1) and the inner slit (L2) is formed in the range of 0.05 ~ 1.0 mm, the height of the outer slit (L1) and the inner slit (L2) is formed in the range of 2 ~ 20 mm, the lower One side of the lower inner periphery of the guide 20 preferably forms an inclination angle θ that forms a horizontal plane within a range of 30 ° to 150 °. For example, the inclination angle θ of one side of the lower inner periphery of the lower guide 20 and the horizontal surface may be variously configured as shown in FIG. 6.

For example, as illustrated in FIGS. 7 and 8, a plurality of dots are formed such that the outer slit L1 and the inner slit L2 are held at equal intervals in each of the outer slit L1 and the inner slit L2. A welded portion 41 welded in the shape of a dot or a flange portion is formed at both sides such that the outer slit L1 and the inner slit L2 are held at equal intervals between the outer slit L1 and the inner slit L2. There may be a plurality of pins 42.

On the other hand, the dedusting system of the filter dust collecting device 100 using the injection nozzle of the configuration as described above according to the present invention is a dedusting air storage container 61 provided on the outside of the filter dust collecting apparatus 100, and one inlet hole ( 9 ') is formed in a plurality of equal intervals in the longitudinal direction, one side is mounted at equal intervals in the longitudinal direction of the dedusting air storage container 61 and the other end is closed to penetrate the upper one side of the filter dust collector 100 A plurality of injection pipes 9 positioned in the vertical upper portion of the dust collecting filter 7 provided in the urine collection device 100 and a plurality of control units 62 provided outside the dedusting air storage container 61. And, one side is connected to the control unit 62 and the other side is made of a vacuum control valve 65 consisting of a valve unit 63 is connected to one side of the plurality of injection pipe (9),

The combination of the dust collecting filter annular double slit injection nozzle having the inflow hole 10 'corresponding to the first inflow hole 9' of the injection pipe 9 and the injection pipe 9 is an upper guide of the injection nozzle ( 10) the connection member 50 which is in contact with the injection pipe (9) and formed a connection hole (51) protruding upper and lower portions on one side so that the first inlet hole (9 ') and the second inlet hole (10') are in communication with each other. Through the

The circumference of the injection pipe (9) is characterized in that it is coupled to the fixing clamp for clamping by welding both sides to the upper guide 10 in the vicinity of both sides of the connecting member (50).

The dedusting air storage container 61 is a structure in which compressed air of high pressure is stored, and is provided on the outside of the bag filter 100 as shown in FIG. 1.

The dust collecting filter 7 is provided in the two dust collecting chambers 2 inside the filter dust collecting apparatus 100, and is arranged in a predetermined arrangement to be fixed to the fixed plate 3 and adsorb dust contained in the processing gas.

The injection pipe 9 may be an example of a cylindrical pipe having one side open and the other closed, and a plurality of inlet holes 9 'are formed at equal intervals in the longitudinal direction. In addition, one open side of the injection pipe 9 is connected to one side of the dedusting air storage container 61, and the other closed side penetrates through an upper side of the dust collector 100 and is perpendicular to the dust collecting filter 7. It is located at the top. In this case, one injection pipe 9 is installed in each row of the dust collecting filter 7, and one inlet hole 9 ′ formed in a plurality at equal intervals in the injection pipe 9 is perpendicular to each dust collecting filter 7. In opposite directions.

The control valve 65 is a plurality of control unit 62 provided on the outside of the vacuum air storage container 61, one side is connected to the control unit 62 and the other side of the plurality of injection pipe (9) It is composed of a valve portion 63 connected to the open one side.

The connection member 50 is formed to be in close contact with the upper part of the second inlet hole 10 'of the upper guide 10 of the injection nozzle and the lower part of the first inlet hole 9' of the injection tube 9 described above. The first inlet hole 9 'and the second inlet hole 10' are communicated with each other due to the connection hole 51 formed at one side. Here, the connecting member 50 may be fixed by welding when closely contacting the upper guide 10 and the injection pipe 9 to secure the airtightness, may be attached with an adhesive or the like, and the top of the connection hole 51, The lower portion is preferably configured to protrude to be equal to the lower side thickness of the injection pipe (9) to be joined and the upper side thickness of the upper guide (10). And the connecting member 50 is not used when the protrusion pipe 31 is formed in the upper guide 10.

When the fixing clamp 70 is formed with the protruding tube 31 in the upper guide 10, the fixing clamp 70 wraps around the injection tube 9 and welds both sides to the upper guide 10 near the protruding tube 31 (F). And clamp the upper guide 10 to the injection pipe 9.

In addition, the fixing clamp 70, when there is no protruding pipe 31 in the upper guide 10, the connecting member 50 via the connecting member 50 between the upper guide 10 and the injection pipe (9). The upper guide 10 is fixed to the injection pipe 9 by clamping the two sides to the upper guide 10 near both sides of the bottom surface by welding.

On the other hand, in the present invention branched to the position of the lower center of the injection pipe (9) relative to the center of the plane of the upper guide 10 of the combined injection nozzle to improve the straightness of the air flowing into the dust collecting filter (7) It may be formed by further forming a hole 9a or a branch pipe 9b extending downward from the branch hole 9a.

Although the present invention has been described in connection with the preferred embodiment, those skilled in the art will be able to easily make various changes and modifications without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation, and the true scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope are included in the present invention. Should be interpreted as.

Claims (14)

In the nozzle mounted on the injection pipe (9) of the dust collecting filter dust extraction system including a discharge pipe (9) is formed in one inlet hole (9 ') to inject the air flowing through the one side, An annular upper guide (10) having a lower portion formed with two inlet holes (10 ') at one side thereof so as to correspond to one inlet hole (9') of the injection pipe (9); An annular lower guide 20 provided below the upper guide 10 and configured to rotate and extend a streamlined cross section; Connect the lower portion of the upper guide 10 and the upper portion of the lower guide 20, between the outer inner circumference of the upper guide 10 and the outer circumference of the lower guide 20 and the inner inner circumference of the upper guide 10 and The outer slit L1 and the inner slit L2 are formed between the inner circumferences of the lower guide 20, respectively, and a gap between the lower part of the upper guide 10 and the upper part of the lower guide 20 is formed. A connecting portion for connecting to form S); Annular dual slit injection nozzle for dust collection filter, characterized in that comprising a. The method of claim 1, The second inlet hole (10 ') is an annular double slit injection nozzle for dust collecting filter, characterized in that formed at least two on the upper portion of the upper guide (10). The method of claim 2, When the two inlet holes (10 ') is an even number to form a structure corresponding to each other dust collection filter annular double slit injection nozzle. The method of claim 2, The upper guide 10 is an annular double slit injection nozzle for dust collecting filter dust, characterized in that to further form a protruding pipe 31 extending a predetermined length upward from the two inlet hole (10 '). The method of claim 1, The connection part is a welding part 41 welded in a plurality of dot shapes so that the outer slit L1 and the inner slit L2 are maintained at equal intervals between the outer slit L1 and the inner slit L2. Annular double slit injection nozzle for dust collecting filter, characterized in that. The method of claim 1, The connection part may be a plurality of pins 42 having flanges formed on both sides such that the outer slit L1 and the inner slit L2 are maintained at equal intervals between the outer slit L1 and the inner slit L2. Circular double slit injection nozzle for dust collection filter. The method of claim 1, The outer slit (L1) and the inner slit (L2) is an annular double slit injection nozzle for dust collection filter, characterized in that 0.05 ~ 1.0 mm. The method of claim 1, The height of the outer slit (L1) and the inner slit (L2) is 2 ~ 20 mm dust collection filter annular double slit injection nozzle for dust extraction. The method of claim 1, One side of the lower inner circumference of the lower guide 20 is an annular double slit injection nozzle for dust collection filter, characterized in that the inclination angle (θ) of the horizontal plane is 30 ° ~ 150 °. In the dust extraction system of the filter dust collecting device 100 using an annular double slit injection nozzle for dust collection filter according to any one of claims 1 to 3 and 5 to 9, A dedusting air storage container 61 provided outside the bag filter 100; A plurality of inlet holes (9 ') are formed at equal intervals in the longitudinal direction, one side is mounted at equal intervals in the longitudinal direction of the dedusting air storage container (61) and the other end is closed to the top of the filter dust collector 100 A plurality of injection pipes 9 penetrating through one side and positioned in a vertical upper portion of the dust collecting filter 7 provided in the filter dust collecting apparatus 100; A plurality of control unit 62 provided on the outside of the vacuum air storage container 61, one side is connected to the control unit 62 and the other side is connected to one side of the plurality of injection pipe (9) It consists of a vacuum control valve (65) consisting of (63), The combination of the dust collecting filter annular double slit injection nozzle having the inflow hole 10 'corresponding to the first inflow hole 9' of the injection pipe 9 and the injection pipe 9 is an upper guide of the injection nozzle ( 10) the connection member 50 which is in contact with the injection pipe (9) and formed a connection hole (51) protruding upper and lower portions on one side so that the first inlet hole (9 ') and the second inlet hole (10') are in communication with each other. Through the A circular double slit for dust collection filter dusting, characterized in that coupled to the circumference of the injection tube (9) and coupled to the fixing clamp for welding the two sides to the upper guide (10) in the vicinity of both sides of the connecting member (50). Dust removal system of filter dust collector using injection nozzle. The method of claim 10, The upper and lower portions of the connecting hole 51 are protruded to be the same as the lower side thickness of the injection pipe (9) to be coupled and the upper side thickness of the upper guide (10) annular double slit for dust extraction filter Dust collection system of filter dust collector using injection nozzle. The method of claim 10, The injection pipe (9) is located at the lower center of the injection pipe (9) with respect to the center of the plane of the upper guide (10) of the combined injection nozzle to improve the straightness of the air flowing into the dust filter (7) A dust collecting system according to claim 1, further comprising a branching hole (9a) or a branching pipe (9b) extending downward from the branching hole (9a). In the dust collecting system of the filter dust collecting apparatus 100 using the annular double slit injection nozzle for dust collecting filter according to claim 4, A dedusting air storage container 61 provided outside the bag filter 100; A plurality of inlet holes (9 ') are formed at equal intervals in the longitudinal direction, one side is mounted at equal intervals in the longitudinal direction of the dedusting air storage container (61) and the other end is closed to the top of the filter dust collector 100 A plurality of injection pipes 9 penetrating through one side and positioned in a vertical upper portion of the dust collecting filter 7 provided in the filter dust collecting apparatus 100; A plurality of control unit 62 provided on the outside of the vacuum air storage container 61, one side is connected to the control unit 62 and the other side is connected to one side of the plurality of injection pipe (9) It consists of a vacuum control valve (65) consisting of (63), A circular type for dust collection filter dusting, characterized in that coupled to the circumference of the injection pipe (9) is coupled to the fixing clamp for clamping by welding (F) both sides to the upper guide (10) in the vicinity of the protruding pipe (31). Dust Removal System of Filter Precipitator Using Double Slit Injection Nozzle. The method of claim 13, The injection pipe (9) is located at the lower center of the injection pipe (9) with respect to the center of the plane of the upper guide (10) of the combined injection nozzle to improve the straightness of the air flowing into the dust filter (7) A dust collecting system according to claim 1, further comprising a branching hole (9a) or a branching pipe (9b) extending downward from the branching hole (9a).