KR101643574B1 - Jet nozzle for bagfilter cleaning - Google Patents

Abstract

The present invention relates to a blowing filter discharge nozzle for discharging dust collected in a bag filter by supplying compressed air to a bag filter while being coupled to a blow tube for supplying compressed air, To the bag filter side to provide a discharge gas flow; The discharge tube is fixed in a form to receive a part of the discharge tube and is spaced apart from the discharge tube to guide the compressed air discharged from the discharge tube to an inlet port provided in the bag filter, To increase the flow rate of the exhaust gas stream, and to increase the flow rate of the exhaust gas stream as the diameter of the exhaust gas stream decreases toward the bag filter side, thereby increasing the flow rate of the exhaust gas stream; And a discharge tube fixing piece for fixing the outer circumferential surface of the discharge tube to the inner circumferential surface of the guide tube in a spaced apart state.

Description

{JET NOZZLE FOR BAGFILTER CLEANING}

More particularly, the present invention relates to a jet nozzle for exhausting a bag filter, and more particularly, to a jet nozzle for jetting dust from a bag filter through compressed air of a blow tube to increase the flow rate and flow rate of the jet nozzle The present invention relates to an injection nozzle for exhausting a bag filter.

BACKGROUND ART [0002] One type of dust collecting apparatus for removing solid or liquid fine particles existing in the air is a dust collecting apparatus using a bag filter.

BACKGROUND OF THE INVENTION [0002] A dust collecting apparatus using a bag filter is one of air pollution prevention devices for filtering out harmful particles contained in various atmospheric particulate matter and exhaust gas emitted from factories, etc., which cause air pollution.

The filtration method of the dust collecting device using the bag filter includes a surface filtration method in which dust is attached to the surface of a filter material such as a thin paper or fiber and a filtration cloth in which a thick layer of filter material such as glass fiber or cotton fiber is made into a bag- That is, an internal filtration method for collecting dust in the fiber layer of the bag filter. At the beginning of the operation, the dust is separated only by the filter medium, but the dust layer accumulated on the surface of the filter medium over time serves as the filter body. As the dust layer functions as the main filtration layer, the collection efficiency increases, but at the same time, it can act as a resistor which interrupts the gas flow.

This type of dust collection system is one of the excellent dust collecting technologies. However, when the bag filters are properly selected, high efficiency can be obtained. However, if the bag filters are clogged due to overload of the pressure loss, the life of the filter medium is shortened, do. Therefore, if the dust layer on the surface of the bag filter becomes too thick, the pressure loss becomes large. Therefore, after the dust filter is used for a certain period of time, dust removal work should be performed.

As a conventional method for exhausting the bag filter, a method of backwashing the dust collected in the bag filter by spraying a high-pressure exhaust gas stream through the injection nozzle periodically in a blow tube has been used.

However, the conventional injection nozzle has a limitation in that it can not effectively remove the dust collected by the bag filter because the flow rate of the exhaust gas is limited by injecting only the compressed air supplied from the blow tube, Is not uniformly transferred to the inner surface of the bag filter, thereby lowering the exhaustion efficiency.

As a prior art of the present invention, there is a bag filter injector proposed in Korean Patent Registration No. 10-0718708.

The present invention relates to a dust collector provided with a plurality of bag filters for collecting air introduced into a housing, and a jetting tube disposed above the bag filter to jet a compressed gas supplied from outside, A body portion having a hollow structure having an inlet gas inlet port formed at an upper portion thereof, And an annular chamber portion extending from an upper portion of the body portion and having a nozzle slot formed at a side of the inlet gas inlet, and a compression gas inlet formed at one side of the preliminary chamber to communicate with the injection pipe. And a spray nozzle for spraying the compressed gas downward is formed at one side of a lower portion of the spray pipe penetrating through the body.

This prior art has the effect of multiplying the suction force of the suction target gas by injecting the compressed gas in the nozzle nozzle formed in the nozzle slot of the annular chamber portion and the spray nozzle penetrating through the body portion. However, in the spraying tube for supplying the compressed air, So that it is complicated in construction and troublesome to manufacture.

In addition, the prior art has a problem that the surrounding air flowing into the body is interrupted by the spray tube, so that the flow of ambient air is not smooth and the flow rate of the exhaust airflow can not be increased due to the cylindrical body.

Korean Patent Registration No. 10-0718708

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a blow- It is an object of the present invention to provide a jetting nozzle for discharging a bag filter which can increase the flow rate of a venting flow and at the same time increase the flow velocity of the venting flow to the bag filter to improve the venting efficiency.

In addition, it is another object of the present invention to provide a spraying nozzle for discharging a bag filter which can further increase the flow rate of the venting airflow by adding a structure capable of introducing peripheral airflows of the guide tube as well as peripheral airflows of the discharge tube, Purpose.

It is another object of the present invention to provide a spraying nozzle for discharging a bag filter which can flow the surrounding airflow more smoothly by constituting the flow direction of the airflow around the discharge pipe and the flow direction of the airflow around the guide pipe to be different from each other, It is a purpose.

According to another aspect of the present invention, there is provided a blowing nozzle for blowing dust in a bag filter, comprising: a bag filter coupled to a blow tube for supplying compressed air to supply compressed air to the bag filter to exhaust dust collected in the bag filter; A discharging tube connected to a discharge port of the blow tube for discharging compressed air to the bag filter side to provide a discharging stream; The discharge tube is fixed in a form to receive a part of the discharge tube and is spaced apart from the discharge tube to guide the compressed air discharged from the discharge tube to an inlet port provided in the bag filter, To increase the flow rate of the exhaust gas stream, and to increase the flow rate of the exhaust gas stream as the diameter of the exhaust gas stream decreases toward the bag filter side, thereby increasing the flow rate of the exhaust gas stream; And a discharge tube fixing piece for fixing the outer circumferential surface of the discharge tube to the inner circumferential surface of the guide tube in a spaced apart state.

In addition, the present invention may further comprise a venturi unit extended from the lower end of the guide pipe and extending in the same direction as the bag filter, the venturi unit forming a venturi pipe together with the guide pipe extending toward the bag filter.

In addition, the present invention is characterized in that the guide tube is fixed in a form to receive the guide tube and is spaced apart from the guide tube, and the peripheral flow of the guide tube is introduced through the spacing space, An additional guide pipe for guiding the fuel to the bag filter side; And a guide pipe fixing piece for fixing the outer circumferential surface of the guide pipe in a spaced-apart relation to the inner circumferential surface of the additional guide pipe.

Here, it is preferable that the additional guide pipe is formed in a cone shape having a diameter larger than that of the guide pipe, and the diameter of the additional guide pipe decreases toward the bag filter side, thereby increasing the flow rate of the exhaust gas flow.

In addition, the present invention is characterized in that an upper end portion of the guide tube is protruded in the form of a flange along a rim and covers an upper portion of a space formed between the guide tube and the additional guide tube, And a guide pipe flange for introducing the air in a direction different from the direction of air flow around the discharge pipe.

According to an aspect of the present invention, there is provided a discharge nozzle for discharging a bag filter, the guide tube being fixed in a spaced-apart state while receiving a part of the discharge tube, the compressed air discharged from the discharge tube The flow rate of the exhaust gas flow can be increased because the ambient air introduced into the guide pipe is combined and guided to the bag filter, and at the same time, the flow rate of the exhaust gas flow increases as the diameter of the guide pipe becomes closer to the bag filter The exhausting efficiency of the bag filter can be improved.

In addition, according to the present invention, since the additional guide tube is fixed in a state of being separated while accommodating the guide tube, the peripheral airflow of the guide tube is introduced together with the peripheral air stream of the discharge tube,

Further, as the guide pipe flange provided at the upper end of the guide tube covers the upper portion of the spacing space between the additional guide pipe and the guide pipe, the peripheral air flow of the guide pipe is different from the flow direction of the air stream around the discharge pipe, The inflow radius of the surrounding airflow can be expanded.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a jetting nozzle for discharging a bag filter according to a first embodiment of the present invention; Fig.
FIG. 2 is a longitudinal sectional view showing a jetting nozzle for discharging a bag filter according to a first embodiment of the present invention. FIG.
3 is a perspective view showing a jetting nozzle for discharging a bag filter according to a second embodiment of the present invention.
4 is a longitudinal sectional view showing a jetting nozzle for bag filter exhausting according to a second embodiment of the present invention.
5 is a perspective view showing a jetting nozzle for dust removal of a bag filter according to a third embodiment of the present invention.
6 is a longitudinal sectional view showing a jetting nozzle for dust removal of a bag filter according to a third embodiment of the present invention.
FIG. 7 is a perspective view showing a jetting nozzle for dust removal of a bag filter according to a fourth embodiment of the present invention; FIG.
FIG. 8 is a longitudinal sectional view showing a jetting nozzle for dust removal of a bag filter according to a fourth embodiment of the present invention; FIG.
9 is a graph showing the dust collection / exhaustion performance of each embodiment.
10 is a graph showing the change in pressure applied to the bag filter as the dust collection / exhaustion cycle of each embodiment is increased.
11 is a graph showing a pressure difference between the dust collecting / draining of each embodiment.
12 is a graph showing the pressure loss of each embodiment.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ",or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

2, the bag filter exhausting injection nozzle 10 of the present invention supplies compressed air supplied from a blow tube 1 constituting a dust collecting system to the inside of the bag filter 2 and supplies it to the bag filter 2, To remove dust collected in the dust collecting apparatus.

1, the bag filter exhausting nozzle 10 according to the first embodiment of the present invention includes a discharge pipe 100, a guide pipe 200, and a discharge pipe fixing piece 300 .

1 and 2, the discharge tube 100 is connected to the discharge port 1a of the blow tube 1 and is spaced apart from the bag filter 2, To the bag filter (2) side to provide a ventilator flow inside the bag filter (2).

Here, as shown in FIG. 2, the bag filter 2 may be provided with a venturi at the inlet 2a to increase the flow velocity of the exhaust gas stream. The detailed configuration of the bag filter 2 is well known in the art to which the present invention pertains, and thus a detailed description thereof will be omitted.

The guide pipe 200 is a component for expanding the flow rate of the exhaust gas flow by introducing the peripheral air flow of the discharge pipe 100 and guiding it to the bag filter 2 together with the compressed air of the discharge pipe 100.

1, the guide pipe 200 is fixed to the outer circumferential surface of the discharge pipe 100 by a discharge pipe fixing member 300, which receives a part of the discharge pipe 100 and is connected to the discharge pipe 100, Thereby forming a spacing space 210 therebetween.

2, the guide pipe 200 guides the compressed air discharged from the discharge pipe 100 to the inlet 2a of the bag filter 2, discharges the compressed air through the negative pressure generated by the discharge of the compressed air, The peripheral air flow of the pipe 100 flows into the spacing space 210 to increase the flow rate of the exhaust gas flow.

2, it is preferable that the guide tube 200 is formed in a cone shape so that the diameter of the guide tube 200 decreases toward the bag filter 2 side. Accordingly, the exhaust gas flow discharged to the guide pipe 200 can be more smoothly supplied to the bag filter 2 as the flow velocity increases by Bernoulli's theorem.

1 and 2, a plurality of discharge tube fixing pieces 300 are provided along the outer circumferential surface of the discharge tube 100 to fix the discharge tube 100 to the inner circumferential surface of the guide tube 200 in a spaced-apart relationship.

As described above, according to the first embodiment of the present invention, the guide tube 200 is fixed in a spaced state while receiving a part of the discharge tube 100, The compressed air discharged from the discharge pipe 100 and the peripheral air flowing into the guide pipe 200 are combined and guided to the bag filter 2 as the surrounding air flows into the space 210. As a result, At the same time, since the guide pipe 200 is formed in a cone shape and the diameter of the guide pipe 200 decreases toward the bag filter 2 side, the flow velocity of the exhaust gas flow increases, so that the exhaustion efficiency of the bag filter 2 can be improved.

3 and 4, the bag filter exhausting nozzle 20 according to the second embodiment of the present invention further includes a venturi 400 in the injection nozzle 10 of the first embodiment, .

3 and 4, the Venturi 400 is a component that extends to the lower end of the guide tube 200 to form a conventional Venturi tube together with the guide tube 200. [

That is, the venturi 400 is formed to extend in diameter from the guide tube 200 toward the bag filter side, so that the Venturi tube is formed together with the guide tube 200 to vary the pressure of the ventilator flow, .

5 and 6, the bag filter exhausting jetting nozzle 30 according to the third embodiment of the present invention is further provided with the additional guide pipe 500 and the guide pipe fixing member 30 in the injection nozzle 10 of the first embodiment, (600). ≪ / RTI >

The additional guide pipe 500 introduces the ambient air of the guide pipe 200 and supplies the compressed air of the discharge pipe 100 and the surrounding air of the discharge pipe 100 introduced into the guide pipe 200, Thereby further expanding the flow rate of the exhaust gas flow.

5 and 6, the additional guide pipe 500 is fixed to the outer circumferential surface of the guide pipe 200 by the guide pipe fixing piece 600 to be described later while receiving the guide pipe 200, Thereby forming a spacing space 510.

6, the additional guide pipe 500 guides the exhaust gas discharged from the guide pipe 200 to the inflow port 2a of the bag filter 2 and discharges the negative pressure generated by the discharge of the exhaust gas stream The peripheral airflow of the guide pipe 200 flows into the spacing space 510 to increase the flow rate of the exhaust gas flow.

6, the additional guide pipe 500 is formed in a cone shape having a diameter larger than that of the guide pipe 200 and is formed in a cone shape so that the diameter of the cone pipe becomes narrower toward the bag filter 2 side. Accordingly, the exhaust gas flow discharged from the additional guide pipe 500 can be supplied to the bag filter 2 more smoothly as the flow velocity increases by Bernoulli's theorem.

5 and 6, a plurality of guide tube fixing pieces 600 are provided along the outer circumferential surface of the guide tube 200 to fix the guide tube 200 to the inner circumferential surface of the additional guide tube 500 in a spaced apart state .

As described above, according to the third embodiment of the present invention, since the additional guide pipe 500 is fixed in a state of being separated while receiving the guide pipe 200, The peripheral airflow of the guide pipe 200 flows along with the peripheral airflow of the exhaust pipe, so that the flow rate of the exhaust gas flow can be further increased.

7 and 8, the bag filter exhausting injection nozzle 40 according to the fourth embodiment of the present invention further includes a guide pipe flange 700 in the injection nozzle 30 of the third embodiment, .

The guide pipe flange 700 is a component for expanding the inflow radius of the ambient air flow by introducing the air flow direction around the discharge pipe 100 and the air flow direction around the guide pipe 200 in different directions.

7 and 8, the guide tube flange 700 is protruded in the form of a flange along the upper end edge of the guide tube 200, so that the distance between the additional guide tube 500 and the guide tube 500 (500) while surrounding the upper part of the guide pipe (200).

That is, the air stream around the discharge tube 100 flows in the space 210 from above the guide tube 200, and the air stream around the guide tube 200 is separated from the space 510 in the side of the additional guide tube 500, Lt; / RTI >

As described above, according to the fourth embodiment of the present invention, since the guide tube flange 700 provided at the upper end of the guide tube 200 is connected to the additional guide tube 500 and the guide tube 500, The peripheral air flow of the guide pipe 200 flows from the side of the additional guide pipe 500 different from the flow direction of the air stream around the discharge pipe 100 as the upper part of the spacing space 510 between the guide pipe 200 is covered The inflow radius of the airflow can be expanded.

The operation and effect of the embodiments according to the present invention will be described below with reference to Figs. 9 to 12. Fig.

9 is a graph comparing the dust collecting / draining performance according to each embodiment of the present invention by injecting the load of the dust to the highest possible level and the dust collecting / draining performance of the compressed air discharged from the blow tube alone (comparative example).

Specifically, FIG. 9 is a view showing a state in which the bag filter exhausting injection nozzle is installed in a blow tube of a dust collecting / discharging system using a bag filter, dust is uniformly injected for 30 minutes, FIG.

As shown in FIG. 9, the ejection nozzles of the respective embodiments exhibit significantly improved exhausting performance as compared with the comparative example, indicating that they are superior in the order of the fourth embodiment, the first embodiment, the third embodiment, and the second embodiment .

10 is a graph comparing the pressure change of each embodiment of the bag filter as the dust collection / exhaustion cycle is increased and the pressure change of the compressed air discharged by the blow tube alone (comparative example).

Specifically, FIG. 10 is a graph showing the pressure applied to the bag filter after collecting dust by uniformly injecting dust for 5 minutes.

As shown in FIG. 10, the ejection nozzles of the respective embodiments repeat the dust collection / exhaustion, and thus the exhaustion performance is greatly improved as compared with the comparative example. Fourth embodiment> First embodiment> Third embodiment> In the order of Examples.

11 is a graph comparing the pressure difference between the dust collection / exhaustion according to each embodiment of the present invention and the pressure difference between the dust collection / exhaustion of the compressed air discharged from only the blow tube (comparative example) The bigger the burnout, the more you can see.

As shown in FIG. 11, in the comparative example, it is confirmed that the exhaustion is hardly caused by the clogging phenomenon of the bag filter after about 8 cycles. However, in each of the embodiments of the present invention, .

FIG. 12 is a graph comparing the pressure loss of each of the embodiments occurring over time and the pressure loss of the compressed air discharged only by the blow tube (comparative example).

As shown in FIG. 12, in the comparative example, it is confirmed that the maximum pressure loss occurs after about 50 minutes have elapsed. However, in each of the embodiments of the present invention, after a lapse of 2 to 3 times It can be confirmed that a pressure loss occurs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

1: blow tube 1a: outlet
2: bag filter 2a: inlet
10, 20, 30, 40: injection nozzles according to the respective embodiments
100: Discharge tube 200: Guide tube
210: Displacement space 300: Discharge tube fixing piece
400: Venturi 500: Additional Information Hall
510: spacing space 600: guide tube fixing piece
700: Guide tube flange

Claims (5)

1. A bag filter discharge nozzle for discharging dust collected in a bag filter by supplying compressed air to a bag filter while being coupled to a blow tube for supplying compressed air,
A discharge tube connected to the discharge port of the blow tube to discharge compressed air to the bag filter side to provide a discharge gas flow;
The discharge tube is fixed in a form to receive a part of the discharge tube and is spaced apart from the discharge tube to guide the compressed air discharged from the discharge tube to an inlet port provided in the bag filter, To increase the flow rate of the exhaust gas stream, and to increase the flow rate of the exhaust gas stream as the diameter of the exhaust gas stream decreases toward the bag filter side, thereby increasing the flow rate of the exhaust gas stream;
A discharge tube fixing part for fixing the outer circumferential surface of the discharge tube to the inner circumferential surface of the guide tube in a spaced apart state;
An additional guide pipe which is fixed in a form to receive the guide pipe and forms a spaced-apart space from the guide pipe, further introduces a peripheral flow of the guide pipe and further increases a flow rate of the discharge gas flow to the bag filter; And
And a guide tube fixing piece for fixing the outer circumferential surface of the guide tube in a spaced-apart relationship to the inner circumferential surface of the additional guide tube,
The additional guide tube may further include:
Wherein a diameter of the cone is larger than that of the guide pipe, and the diameter of the cone is decreased toward the bag filter side, thereby increasing the flow rate of the exhaust gas stream,
The guide tube has an upper end protruding in the form of a flange along the rim and covering the upper portion of the spacing space formed between the guide tube and the additional guide tube while allowing the inflow direction of the peripheral airflow of the guide tube to flow into the inflow Further comprising a guide tube flange for introducing the guide tube flange in a direction different from the direction of the guide tube flange,
The guide tube flange has a guide-
A peripheral air flow of the discharge tube is introduced into the space between the discharge tube and the guide tube above the guide tube,
And a peripheral air flow of the guide tube is introduced into a spacing space between the guide tube and the additional guide tube at a side of the additional guide tube.
Claim 1
Further comprising a Venturi unit extending from the lower end of the guide pipe to extend in the same direction as the bag filter and having a larger diameter toward the bag filter side and forming a Venturi pipe together with the guide pipe.
delete delete delete

Images