JP7453414B2 - Dust re-scattering prevention device for a filtration dust collector including a filter bag protection air curtain generation module and a filtration dust collector equipped with the same - Google Patents

Description

The present invention relates to a dust re-entrainment prevention device for a filtration dust collector that includes a filter bag protection air curtain generation module and a filtration dust collector equipped with the same, and more particularly, the present invention relates to a dust re-entrainment prevention device for a filtration dust collector that includes an air curtain around the filter bag. A dust re-entrainment prevention device for a filtration dust collector that includes a filter bag protection air curtain generation module that prevents the downdraft generated by the dust re-entrainment prevention device from damaging the filter bag by dispersing it. and a filtration dust collector equipped with the same.

Various industrial facilities use filtration and dust collectors to collect particulate pollutants such as dust.

A bag filter is installed in such a filtration and dust collection device, and can filter fine dust particles with high efficiency. When using a filter, it has the advantage of increasing the particle capture rate and increasing the dust collection efficiency, but if an excessive dust layer is formed on the filter surface, pressure loss will occur, so periodic desorption is necessary. Dust is needed.

However, in existing filtration and dust collection equipment, dust is re-dispersed when the dust layer on the surface of the filter is removed during the dust removal process, or when air flows in through the inlet at the bottom, causing the dust to collect in the equipment. There was a problem of reducing efficiency.

More specifically, according to the structure of the conventional filtration and dust collection device, air containing dust enters through the inlet at the bottom of the device, passes through the filter, and exits to the outlet at the top. With this kind of structure, when air flows in, there is a risk that the dust that has accumulated at the bottom of the device will be re-dispersed, and the dust that escaped during the dust removal process will also be re-dispersed without settling to the bottom of the device, reducing the efficiency of the filter. It can be done.

In an attempt to solve these problems, the prior art has introduced an off-line dust removal method.

The off-line dust removal method is a method in which the operation of the bag filter filtration dust collector is stopped during dust removal operation, and the dust removal efficiency is very high because there is no upward airflow. Because of the reality that it is not possible to stop the operation of the device, when initially installing the bag filter filtration dust collector, it is necessary to install an extra device for dust removal and stop the device for the added surplus. By carrying out dust removal after cleaning, the overall operating amount can be maintained constant. However, in this case, there is a problem that the additional installation of the device increases the total installation cost of the bag filter filtration and dust collection device by about 30% or more.

"Centrifugal filtration type bag filter dust collector" (hereinafter referred to as "Patent Document 2") of Korean Patent No. 10-0764753 discloses a method for removing dust by moving dust generated in a bag filter room to a cyclone room. are doing.

More specifically, in Patent Document 2, the air from which primary dust has been removed by the cyclone smoothly moves to the upper bag filter, and the dust brushed off from the filter bag of the bag filter smoothly descends to the cyclone. A structure for preventing dust and foreign matter from being deposited in a bag filter room above a venturi is disclosed. However, according to the structure of Patent Document 2, it is necessary to install a separate venturi in the center of the dust collection equipment, which increases the cost of the equipment and may reduce the efficiency of the equipment by blocking the incoming air flow. .

The “Dust Collector Dust Scattering Prevention Device” (hereinafter referred to as “Patent Document 3”) of the Republic of Korea Patent No. 10-1168680 makes it possible to check the dust collection status of the dust collector in real time, and prevents dust scattering due to dust collection errors. A structure that prevents the above is disclosed. For this purpose, in Patent Document 3, an elevating body that is raised and lowered by the pressure of the intake air drawn into the dust collector is installed, and a display body that is raised and lowered in conjunction with the lifting and lowering operation of the elevating body is provided, so that the operator can Check the elevation of the display and check the dust collection status of the dust collector in real time.

In other words, Patent Document 3 does not present a fundamental solution for preventing the re-dispersion of dust due to rising air currents, but merely presents a method for performing post-processing when re-dispersion occurs. .

In the "Re-scattering and re-adhesion prevention bag filter filtration dust collection device" (hereinafter referred to as "Patent Document 4") of the Republic of Korea Patent Publication No. 2003-0089791, when the dust collected in the bag filter is removed, Disclosed is a structure that prevents removed dust lumps from re-adhering to a bag filter after being re-dispersed, and reduces the dust load on the bag filter.

Specifically, in Patent Document 4, in an existing bag filter filtration dust collection device, a funnel-shaped dust collection plate is installed below the bag filter to collect the removed dust, and the collection plate is The structure of the discharge pipe connecting the dust collection plate and the dust storage tank is disclosed so that the collected dust is transferred to the dust storage tank. However, Patent Document 4 merely discharges the removed dust to the outside and reduces the amount of re-scattered dust, but does not present a fundamental solution for preventing re-splatter.

In order to solve these problems, in the Republic of Korea Patent No. 10-1998316 (hereinafter referred to as "Patent Document 1"), a sealed compartment is formed in the lower part of the clean room to generate a downdraft, and the dust is recycled. It presents a fundamental solution to prevent scattering.

However, although the technology of Patent Document 1 can prevent dust from being re-dispersed due to downdrafts, there is a possibility that the downdrafts will be dispersed due to the complicated air flow inside the dust collection equipment. A problem has been raised that the downdraft may impinge on the filter bag and shorten the life of the filter bag.

The present invention was made in order to solve the above-mentioned conventional problems, and by forming an air curtain around the filter bag, the descending airflow of the dust re-entrainment prevention device is dispersed and directed directly to the filter bag. It is an object of the present invention to provide a dust re-scattering prevention device for a filtration dust collector including a filter bag protection air curtain generation module that can prevent collisions, and a filtration dust collector equipped with the same.

In order to solve the above problems, the present invention forms a sealed housing that overlaps the lower part of a clean room, and forms a sealed housing on one side of the housing so that air can flow into the housing from the outside. a protective wall formed to surround the inner part of the housing of the bag filter so as to prevent the bag filter from being damaged by the inflowing air; and a bottom surface of the housing, an air jet surface for forming a downward airflow in the internal space of the filter, and an air curtain formed around the bag filter to prevent the downward airflow from colliding with the bag filter in the internal space of the filtration/dust collector while being dispersed. Disclosed is a dust re-entrainment prevention device for a filtration dust collector, which includes a filter bag protection air curtain generation module.

According to an embodiment of the present invention, the air jet surface includes through holes having a diameter larger than the diameter of the bag filter, and the bag filter is disposed at the center of each of the through holes.

According to an embodiment of the present invention, the filter bag protection air curtain generation module is formed on the lower surface of the air jet surface so as to overlap the through hole.

According to an embodiment of the present invention, the filter bag protection air curtain generation module has a first cylindrical member extending vertically and having a cylindrical shape, and a circumference larger than the first cylindrical member; A second cylindrical member arranged to surround the cylindrical member, and the first cylindrical member and the second cylindrical member are connected to each other, and are spaced apart at a constant angular interval to form a plate shape extending vertically. and a plurality of eddy current prevention members.

According to an embodiment of the present invention, the first cylindrical member has a shape in which the protective wall extends below the air jet surface.

According to an embodiment of the present invention, the second cylindrical member is formed to extend toward a lower portion of the air jet surface at a boundary of the through hole.

According to an embodiment of the present invention, the height of the first cylindrical member is greater than the height of the second cylindrical member.

Further, the present invention includes a body, a plurality of filter bags installed inside the body to extend vertically, and a housing attached to an upper end of the body, and the filter bags are configured to include a body, a plurality of filter bags installed inside the body so as to extend vertically, and a housing attached to an upper end of the body. Dust that prevents the dust from being re-dispersed by generating a downdraft of air, and forms an air curtain around the plurality of filter bags to prevent the plurality of filter bags from being damaged by the downdraft. A filtration dust collector including a re-entrainment prevention device is disclosed.

According to an embodiment of the present invention, the dust re-scattering prevention device is connected to a first section having a certain height and one end of the first section, and has a step between the first section and the first section. and a second section formed to have a height greater than the height of the first section.

According to an embodiment of the present invention, the dust re-scattering prevention device includes a first cylindrical member formed on the lower surface of the housing, surrounding the plurality of filter bags, and extending vertically; a second cylindrical member having a circumference larger than the first cylindrical member and arranged to surround the first cylindrical member; and a second cylindrical member connecting the first cylindrical member and the second cylindrical member and separating them at a constant angular interval. and a plurality of plate-shaped eddy current prevention members extending vertically.

The filter bag protection air curtain generation module applied to the present invention can generate an air curtain by injecting a descending airflow with enhanced straightness around the filter bag.

Further, the descending airflow dispersed in the direction of the filter bag is fanned by the air curtain while approaching the filter bag, and the direction of the airflow changes downward, thereby preventing damage to the air curtain.

In addition, according to the present invention, the vortex prevention vanes are arranged at regular angular intervals inside the cylindrical curtain generating body, thereby preventing the generation of vortices in the air curtain and improving the straightness of the downdraft. can be strengthened.

1 is a conceptual diagram of a filtration dust collector to which a dust re-scattering prevention device for a filtration dust collector including a filter bag protection air curtain generation module according to an embodiment of the present invention is applied. FIG. 2 is an enlarged conceptual diagram of a dust re-scattering prevention device including the filter bag protection air curtain generation module shown in FIG. 1; FIG. 3 is a plan cross-sectional view of the dust re-scattering prevention device taken along line IV-IV in FIG. 2; FIG. 4 is an enlarged conceptual diagram of area A in FIG. 3 viewed from below. FIG. 5 is a conceptual diagram of the filter bag protection air curtain generation module shown in FIG. 4 viewed diagonally from below. FIG. 2 is a conceptual diagram of a two-stage dust re-entrainment prevention device including a filter bag protection air curtain generation module. FIG. 6 is a conceptual diagram of a filter dust collector to which the two-stage dust re-scattering prevention device shown in FIG. 5 is applied.

The filter bag protection air curtain generation module applied to the dust re-scattering prevention device of the filter dust collector according to the present invention may have various modified embodiments.

In this specification, some of these embodiments will be specifically described with reference to the drawings. However, it is understood that this is not intended to limit the present invention to a particular embodiment, but includes all modifications, equivalents, and alternatives that fall within the technical spirit and scope of the present invention. There must be.

Hereinafter, in this specification, even if the embodiments are different from each other, the same or similar configurations will be given the same or similar reference numerals, and the first description can be referred to for them. As used herein, the singular expressions include plural expressions unless the context clearly has a different meaning.

In addition, the suffix "module" or "unit" used in the following explanations for constituent elements is only a term used for convenience in writing the specification, and does not have mutually distinct meanings or roles. Never have one.

FIG. 1 is a conceptual diagram of a filter dust collector to which a dust re-scattering prevention device for a filter dust collector including a filter bag protection air curtain generation module according to an embodiment of the present invention is applied.

A large number of filters are placed inside large-scale dust collection equipment because a large amount of dust must be processed at once. Each filter bundle may be placed next to each other. Hereinafter, in this specification, for convenience of explanation, a plurality of filters bundled in a fixed unit will be referred to as a "filter bundle."

A filter dust collector 100 according to an embodiment of the present invention includes a plurality of filter bundles disposed inside a body 101. For example, as shown in FIG. 1, the first filter bundle 130 and the second filter bundle 140 may be arranged adjacent to each other.

A first lid 111 that covers the first filter bundle 130 and a second lid 112 that covers the second filter bundle 140 may be disposed on the upper surface of the body 101 . When users perform work such as replacement, repair, or cleaning on filter bundles, they can open the lid of each filter bundle and perform the work on a filter bundle basis without having to interrupt the operation of all filter bundles. Can be done.

Referring to FIG. 1, a dust re-scattering prevention device 200 of a filter dust collector may be installed at the upper end of the body 101.

The dust re-scattering prevention device 200 is arranged at the upper end of the body 101 so as to surround the filter.

As illustrated, the dust re-entrainment prevention device 200 includes a hood on one side through which air flows. A descending airflow jetting surface, a descending airflow concentration protrusion, a filter bag protection air curtain, etc. may be formed at the lower part of the dust re-entrainment prevention device 200.

FIG. 2 is an enlarged conceptual diagram of the dust re-entrainment prevention device including the filter bag protection air curtain generation module shown in FIG. FIG.

Air entering through the hood 210 moves into the interior of the device along the bag filter protection wall 221 surrounding the filter. Since the air pressure is strong when the air flows in, it is possible to prevent the filter from being damaged through the bag filter protection wall 221.

According to another embodiment of the present invention, as shown in FIG. 3, the hood 210 may be arranged so as not to face the bag filter. More specifically, the air flowing through the hood travels along the boundaries of each filter bundle and is divided into each filter bundle. Since the inflowing air does not come into direct contact with the bag filter, the force applied to the bag filter is reduced, and by dividing the air into many filter bundles, the effect of dispersing pressure can be expected.

In addition, a part of the air that hits the bag filter protection wall 221 having a curved surface moves toward the rear protection wall 221 along the curved surface, and a part is reflected and moves to the protection walls 221 on both sides. It becomes like this.

The air that has flown in this way is divided into four directions and flows around each filter.

An air jet surface 231 is formed at the bottom of the dust re-scattering prevention device 200 . An air jet hole is formed in the center of the air jet surface 231 .

The airflow injection holes are formed to have the same distance from two adjacent filters.

According to an embodiment of the present invention, the airflow jetting surface 231 may be sloped downward toward the bottom as the distance from the filter increases, and a jetting hole may be formed at the lowest end of the sloped jetting surface 231 .

In addition, according to another embodiment of the present invention, a protrusion may be formed at an end of the injection surface 231 (boundary of the injection hole) to protrude upward. Since the air has to pass over the protrusion before being injected into the injection hole, large-sized dust particles can be pre-filtered before forming the downdraft.

As shown, a descending airflow concentration protrusion 241 may be formed at the boundary of each filter bundle.

As explained above, in large-scale dust collection facilities, multiple filter bundles may be operated independently. When multiple filter bundles are operated independently in this way, dust from one filter bundle may scatter and flow into other filter bundles, but according to this example, a strong downdraft is created at the boundary of the filter bundles. Dust generated and scattered from one filter bundle can be prevented from flowing into other filter bundles.

The downdraft concentration protrusion 241 may be in the form of a protrusion that protrudes downward at the end of the injection surface 231 (boundary of the injection hole). The descending airflow concentrating protrusion 241 prevents the airflow from colliding with the filter while descending and damaging the filter.

According to another embodiment of the present invention, protrusions may be formed on the inner surface of the downdraft concentrating protrusion 241 and spaced apart from each other at regular intervals. The protrusion may be arranged in a V-shape or a U-shape with an open lower end. Through this, it is possible to create zones at regular intervals at the boundaries of the filter bundle that generate stronger downdrafts.

As described above, in the present invention, a descending airflow is generated through the airflow injection surface, but the descending airflow is dispersed depending on the internal state of the filtration and dust collector, and may apply an impact to the bag filter.

In order to prevent the distributed downdraft from impacting the bag filter, a bag filter protection air curtain generation module may be formed in the dust re-entrainment prevention device of the present invention.

The bag filter protection air curtain generation module forms a highly straight air curtain around the bag filter to prevent the dispersed downdraft from applying impact to the bag filter.

The structure of the bag filter protection air curtain generation module will be described in detail below with reference to FIGS. 4 and 5. FIG.

FIG. 4 is an enlarged conceptual diagram of area A in FIG. 3 viewed from below, and FIG. 5 is a conceptual diagram of the filter bag protection air curtain generation module shown in FIG. 4 viewed obliquely from below.

Referring to FIGS. 4 and 5, the air jet surface includes a through hole having a diameter larger than the diameter of each bag filter. Further, each bag filter is arranged at the center of each of the through holes, and a hole is formed along the periphery of each bag filter.

The filter bag protection air curtain generation module is arranged to overlap each through hole into which each bag filter is inserted.

As illustrated, the filter bag protection air curtain generation module may include a first cylindrical member 222 , a second cylindrical member 261 , and a vortex prevention member 271 .

The first cylindrical member 222 has a vertically extended cylindrical shape. The first cylindrical member 222 may be formed to have the same diameter as the protection wall 221, or may be formed to have a different diameter from the protection wall 221.

If the first cylindrical member 222 has the same diameter as the protection wall 221, the first cylindrical member 222 may not be a separate member separate from the protection wall 221. That is, the protection wall 221 extends below the air jet surface and can also function as the first cylindrical member 222 .

The second cylindrical member 261 has a larger circumference than the first cylindrical member 222 and is arranged to surround the first cylindrical member 222 .

The second cylindrical member 261 preferably extends vertically, but may be formed to be inclined to one side without being parallel to the first cylindrical member 222, if necessary. For example, the second cylindrical member 261 can be made to be inclined toward the outside of the bag filter so that the air curtain spreads outward from the center side.

The plurality of eddy current prevention members 271 are arranged to connect the first cylindrical member 222 and the second cylindrical member 261. The eddy current prevention members 271 are spaced apart from each other at a constant angle, and have a plate shape that extends vertically. As shown in the figure, one module includes four eddy current prevention members 271 spaced apart from each other at 90 degrees, but the separation angle and the number of eddy current prevention members 271 may be changed as necessary.

As shown in Figure 3, during the process in which the air that has entered the inside of the filter dust collector is distributed to each filter bundle, the air that enters each filter bundle can travel in an oblique direction, and the air that travels in an oblique direction turns along the protective wall 221 and a vortex can be generated around the bag filter.

The vortex prevention member 271 can prevent vortices generated while circulating along the protection wall 221 when air descends through the through hole.

Also, according to another embodiment of the present invention, the height of the first cylindrical member 222 may be greater than the height of the second cylindrical member 261. That is, the first cylindrical member 222, which serves as a guide surface adjacent to the bag filter, can be made longer in order to strengthen straightness in a portion close to the bag filter.

FIG. 6 is a conceptual diagram of a two-stage dust re-entrainment prevention device including a filter bag protection air curtain generation module, and FIG. 7 is a conceptual diagram of a filtration dust collector to which the two-stage dust re-entrainment prevention device shown in FIG. 5 is applied. It is.

Referring to FIGS. 6 and 7, the dust re-entrainment prevention device may be formed into two sections having a step difference from each other.

For example, as shown in the figure, the dust re-scattering prevention device includes a first section having a certain height, and the first section connected to one end of the first section and having a step between the first section and the first section. and a second section formed to have a height greater than the height of the first section.

More specifically, the third filter bundle 130' is formed longer than the first filter bundle 130, and a stepped surface 151 is formed between the first filter bundle 130 and the third filter bundle 130'. Similarly, the fourth filter bundle 140' is longer than the second filter bundle 140, and a stepped surface 151 is formed between the second filter bundle 140 and the fourth filter bundle 140'.

Air flows faster in narrower compartments, so when the scale of the filtration and dust collector increases, efficiency can be increased by dividing the dust re-entrainment prevention device into compartments.

That is, it is possible to reduce the air flow in the area close to the hood and increase the air flow in the area far from the hood, thereby improving the dust removal efficiency of the filter dust collector.

According to each of the embodiments described above, an air curtain can be generated by injecting a downward airflow with enhanced straightness around the filter bag, and the downward airflow dispersed in the direction of the filter bag is The direction of the airflow changes downward as it is fanned by the air curtain while being close to the air curtain, so that it does not damage the air curtain. By providing this, it is possible to expect improved effects compared to the conventional technology, such as preventing the generation of eddy currents in the air curtain and strengthening the straightness of descending air currents.

The filter bag protection air curtain generation module applied to the dust re-scattering prevention device of the filtration dust collector described above is not limited to the configuration and method of each embodiment described above, and each of the above embodiments includes the following: All or part of each embodiment may be selectively combined to allow various modifications.

Claims (9)

an inlet formed on one side of the housing to form a sealed housing overlapping a lower part of the clean room, and to allow air to flow into the housing from the outside;
a protective wall formed to surround an inner portion of the housing of the bag filter to prevent the bag filter from being damaged by the incoming air;
an air jet surface forming a bottom surface of the housing and forming a downward air flow in the internal space of the filter dust collector;
The method further includes a filter bag protection air curtain generation module that forms an air curtain around the bag filter so that the downdraft is dispersed and prevented from colliding with the bag filter in the internal space of the filter/dust collector. Dust re-scattering prevention device for filter dust collectors. The filtration filter according to claim 1, wherein the airflow jetting surface is provided with through holes having a diameter larger than the diameter of the bag filter, and the bag filter is disposed at the center of each of the through holes. Dust collector dust re-scattering prevention device. The filter bag protection air curtain generation module includes:
The dust re-scattering prevention device for a filter dust collector according to claim 2, wherein the device is formed on a lower surface of the air jet surface so as to overlap the through hole. The filter bag protection air curtain generation module includes:
a first cylindrical member having a cylindrical shape extending vertically;
a second cylindrical member having a larger circumference than the first cylindrical member and arranged to surround the first cylindrical member;
A claim characterized in that the first cylindrical member and the second cylindrical member are connected to each other, and includes a plurality of plate-shaped eddy current prevention members arranged at constant angular intervals and extending vertically. The dust re-scattering prevention device for the filtration dust collector according to item 3. The first cylindrical member is
5. The dust re-scattering prevention device for a filter and dust collector according to claim 4, wherein the protection wall is formed to extend below the air jet surface. The second cylindrical member is
The dust re-scattering prevention device for a filter dust collector according to claim 5, wherein the device is formed to extend toward a lower part of the air jet surface at a boundary of the through hole. 7. The dust re-scattering prevention device of claim 6, wherein the height of the first cylindrical member is greater than the height of the second cylindrical member. body and
a plurality of filter bags installed in the body so as to extend vertically;
The housing has the form of a housing attached to the upper end of the body, and the air flowing into the housing generates a downdraft to prevent dust from being re-dispersed, and an air curtain is formed around the plurality of filter bags. and a dust re-entrainment prevention device configured to prevent the plurality of filter bags from being damaged by the downdraft,
The dust re-scattering prevention device is
a first section having a certain height;
and a second section connected to one end of the first section and formed to have a height greater than the height of the first section so as to have a step between the second section and the first section. Filter dust collector. The dust re-scattering prevention device is
a first cylindrical member formed on the lower surface of the housing, surrounding the plurality of filter bags, and extending vertically;
a second cylindrical member having a larger circumference than the first cylindrical member and arranged to surround the first cylindrical member;
A claim characterized in that the first cylindrical member and the second cylindrical member are connected to each other, and includes a plurality of plate-shaped eddy current prevention members arranged at constant angular intervals and extending vertically. The filtration dust collector according to item 8 .