KR101943914B1 - Wet type filtering apparatus amd exhaust gas cleaning system with the same - Google Patents

Abstract

The present invention relates to a wet type purification filtering apparatus and an exhaust gas purification system including the same, which can perform wet type cleaning as cleaning water falls along inner and outer surfaces of a multi-pipe filter while coming in contact with exhaust gas by a maximum surface, thereby greatly improving dust removal efficiency and gas cooling efficiency without replacing a filter. The wet type purification filtering apparatus according to a preferred embodiment of the present invention includes a housing, the multi-pipe filter, and a cleaning water injection nozzle.

Description

TECHNICAL FIELD The present invention relates to a wet-type purification filter apparatus and an exhaust gas purification system including the same.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wet-type filtering apparatus for removing atmospheric pollutants and dusts contained in exhaust gases, which are connected to an exhaust pipe, and an exhaust gas purifying system including the same. More particularly, As the washing water sprayed from the upper part of the multi-pipe filter comes in contact with the exhaust gas at the maximum surface area while flowing down on the inner and outer surfaces of the multi-pipe filter, wet cleaning results in dust removal efficiency and gas cooling efficiency And to an exhaust gas purifying system including the wet purifying filtering apparatus.

Generally, exhaust gases emitted from industrial facilities such as thermal power plants, steel mills, and incinerators that burn fossil fuels include not only harmful air pollutants such as SO 2, NO x, dioxin, Therefore, industrial facilities such as a thermal power plant, a steel mill, and an incinerator are provided with an exhaust gas purifying system for removing air pollutants and dust from exhaust gases.

An example of such a double gas purification system is disclosed in Korean Patent Registration No. 10-1841019 (published on Mar. 22, 2018), which discloses a high-temperature (high-temperature) gas purification system including nitrogen oxides (NOx), sulfur oxides An exhaust gas line connected to the exhaust gas line so that high temperature exhaust gas discharged from the incineration power plant combustor flows and can be supplied; and an exhaust gas line connected directly to the exhaust gas line, And a plurality of ceramic filters for simultaneously treating sulfur oxides (SOx), fine dusts (PM-2.5) and nitrogen oxides (NOx) contained in the high-temperature exhaust gas supplied through the exhaust port A fine dust generated in an incineration power plant including a stack for discharging a clean gas purified through a plurality of ceramic filters of a gas processing unit to the outside, The scan processing system is disclosed.

In addition, Korean Patent Registration No. 10-0965912 (Jun. 24, 2010) discloses an incinerator, a boiler connected to the incinerator, a cooling tower connected to the boiler and lowering the temperature of the exhaust gas, An exhaust tower connected to the filtration and dust collector for discharging the exhaust gas to the outside, a first slaked lime injector for injecting high-reactivity powdered slaked lime between the cooling tower and the filter, Or an additional lime injection unit for injecting high-reactivity powdered slaked lime at a downstream end thereof.

As described above, exhaust gas discharged from an industrial facility such as a thermal power plant, a steel mill, and an incinerator is exhausted at a relatively high temperature, and thus cooled at a final stage through a cooling system including a heat exchanger to remove white smoke.

Also, the exhaust gas discharged from industrial facilities such as thermal power plants, steel mills, and incinerators contains a relatively large amount of fine dust, and after a predetermined smoothing process, the fine dust is further collected and removed through filtering at the final stage, and then discharged to the outside.

However, in the conventional diesel particulate filter system as described above, there is a problem that a large amount of electricity is consumed in cooling the high-temperature gas through the heat exchanger, and the filter is quickly closed due to a large amount of dust, The backflow phenomenon is generated, and the maintenance cost is increased due to frequent filter replacement.

1. Korean Patent Registration No. 10-1841019 (2013.02.22) 2. Korean Patent Registration No. 10-0965912 (June 24, 2010)

Therefore, according to the present invention, as the washing water sprayed from the upper portion of the multi-pipe filter to which a plurality of pipes are connected is brought into contact with the exhaust gas with the maximum surface area while flowing down on the inner and outer surfaces of the multi- Which is capable of significantly improving the dust removing efficiency and the gas cooling efficiency without replacing the exhaust gas purifying apparatus and the exhaust gas purifying system.

According to another aspect of the present invention, there is provided a multi-pipe filter comprising: a housing which is connected to an exhaust pipe and extends vertically; a multi-pipe filter provided in the housing and connected with a plurality of pipes; And a cleaning water injection nozzle for spraying the cleaning water from above.

In the present invention, the lower end and the upper end of the housing are formed to be open.

In the present invention, the upper end of the housing is closed and an inlet pipe through which the exhaust pipe is connected is connected to one side of the upper portion of the housing, a drain pipe is connected to the lower side of the housing and the washing water flowing down to the lower end of the housing is drained And a drain pipe connected to the drain pipe is connected.

In the present invention, an upper end of the housing is opened and an inlet pipe through which the exhaust pipe is connected is connected to a lower portion of the housing, and a drain pipe for draining the washing water flowing down to the collection tank is connected to the lower end of the housing.

In the present invention, it is assumed that the inside of the housing is provided with a demister for removing moisture contained in the exhaust gas.

In the present invention, the multi-pipe filter has a structure in which a plurality of pipes each having a circular cross section are connected to each other by a connecting partition wall arranged at an interval of 90 degrees.

In the present invention, the inner area of one of the pipes corresponds to an area surrounded by four pipes adjacent to each other and the connecting partition.

In the present invention, the multi-pipe filter has a structure in which six pipes having a hexagonal cross-section are connected to form a hollow portion having a hexagonal cross-section therein.

In the present invention, the multi-pipe filter may have a structure in which a plurality of pipes having a triangular cross-section are connected to each other by a connection partition wall, or a plurality of pipes having a rectangular cross- Structure.

In the present invention, the housing is to be connected to an exhaust pipe of a dust exhausting facility of one of a thermal power plant, an incinerator and a roaster.

In order to achieve the above object, the present invention also provides a wet-type filtration apparatus having the above-described structure, a cooling heat exchanger connected downstream of the wet-type filtration apparatus, The exhaust gas purifying system comprising:

In the present invention, the dehumidifier further includes a demister disposed between the cooling heat exchanger and the coagulation filter to remove moisture contained in the exhaust gas.

According to another aspect of the present invention, there is provided an internal combustion engine having an internal space divided into a lower portion, an intermediate portion and an upper portion by a first partition plate and a second partition plate, An inlet pipe, a discharge pipe at one side of the middle layer, a housing at the center of the first and second partition plates, the upper and lower communicating pipes communicating the lower and upper portions, and a drain pipe at the lower portion; And a lower end connected to the middle layer portion of the housing and having a plurality of openings formed around the upper and lower communication tubes of the housing, Wherein the dust collecting means collect dust and moisture from the smoke introduced into the upper layer portion, A multi-pipe filter connected to the upper end of the upper and lower communication pipes of the housing and extending vertically and surrounded by the collecting filter and having a plurality of pipes connected to each other; And a cleaning water injection nozzle for spraying the washing water from above the washing water injection nozzle.

In the present invention, the inflow pipe is formed in the form of a double pipe so that outside air flows in at the same time.

In the present invention, the inflow pipe is arranged to be offset toward the center line of the cross section of the housing so that the cyclone dust collecting phenomenon is induced in the lower layer portion of the housing.

In the present invention, the discharge pipe is inserted into the middle layer portion of the main body, and includes an inclined cut portion that is sloped downward to prevent clogging.

The wet cleaning filter and the exhaust gas purifying system including the same may be configured such that the cleaning water sprayed from the upper portion of the multi-pipe filter, to which a plurality of pipes are connected, flows along the inner and outer surfaces of the multi- As wet cleaning is performed with maximum surface contact, dust removal efficiency and gas cooling efficiency can be greatly improved without replacing the filter.

In addition, since a water film is formed when the washing water flows down on the inner and outer surfaces of the multi-pipe filter, the gas flow is accelerated when the exhaust gas is contacted, thereby further increasing the dust removing efficiency.

In addition, since the differential pressure can be reduced by adjusting the diameter and the interval of the pipe forming the multi-pipe filter, the dust removal efficiency can be secured without a large resistance, and the length of the multi-pipe filter can be increased to enhance dust removal efficiency .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view of a wet-type purification filter apparatus according to an embodiment of the present invention; FIG.
2 is a structural view of another embodiment of a wet clarification filtering device according to an embodiment of the present invention;
3 is a cross-sectional perspective view of FIG. 2;
4 is a structural view of another embodiment of a wet clarification filtering device according to an embodiment of the present invention.
Figure 5 is a partial plan view of another embodiment of a multi-pipe filter in a wet clarification filtering device according to an embodiment of the present invention.
6 is a schematic structural view of an exhaust gas purifying system including a wet purifying filtering apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of an exhaust gas purifying system including a wet purifying filtering apparatus according to another embodiment of the present invention; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the present invention being limited only by the terms of the appended claims.

2 is a structural view of another embodiment of the wet-type filtration filtering apparatus according to the embodiment of the present invention, and Fig. 3 is a cross-sectional view of the wet-type filtration filtering apparatus according to the embodiment of Fig. FIG. 4 is a structural view of another embodiment of a wet-type purification filter according to an embodiment of the present invention, and FIG. 5 is a schematic view of a wet-type purification filter according to an embodiment of the present invention, Fig.

The wet purifying filtering apparatus according to an embodiment of the present invention includes a housing that is connected to an exhaust pipe and extends vertically, a multi-pipe filter that is provided in the housing and to which a plurality of pipes are connected, And a rinse water spray nozzle for spraying rinse water from the top of the pipe filter.

Hereinafter, the relationship between the components of the wet-type purifier and the components thereof will be described in detail with reference to FIGS. 1 to 5.

1 to 5, a wet filtering apparatus according to an embodiment of the present invention includes a housing 10 connected to an exhaust pipe 3a, a multi-pipe filter (not shown) provided in the housing 10, 20, 20a, 20b, and 20c, and a cleaning water injection nozzle 30.

Here, the housing 10 is connected to an exhaust pipe 3a of a dust exhausting facility (not shown) to form a wet purification processing space for removing air pollutants and dust collecting. In order to spray clean water And extends vertically.

1, the housing 10 may be formed in a cylindrical pipe shape having a lower end and an upper end opened. In this case, the housing 10 forms a part of the exhaust duct 3a of the dust exhaust facility do. A drain pipe for discharging the dropped washing water to the outside is connected to the lower position on the exhaust pipe 3a of the dust exhaust facility.

2 and 3, the upper end of the housing 10 is closed and formed into a cylindrical pipe shape. An exhaust duct 3a of the dust exhausting facility is connected to an upper portion of the housing 10 to exhaust the exhaust gas for wet cleaning And a discharge pipe 12 through which wet cleaning purified gas is discharged in the housing 10 is connected to the lower end of the housing 10. A lower end of the exhaust pipe 12 is sprayed for wet cleaning of the exhaust gas, And a drain pipe 13 for draining the washed washing water to the water collecting tank 5 is connected.

The exhaust gas flows into the housing 10 through the inlet pipe 11 from the upper side of the housing 10 and is wet-cleaned and then discharged from the lower side of the housing 10 through the discharge pipe 12 to the housing 10, As shown in FIG.

4, the upper end of the housing 10 is opened and the lower end of the housing 10 is narrowed toward the lower part. The exhaust duct 3a of the dust exhausting unit is connected to the lower portion of the housing 10, And a drain pipe 15 for discharging the washing water flowing down to the lower part into the water collecting tank 5 is connected to the lower end thereof.

In this case, the exhaust gas flows into the interior of the housing 10 through the inflow pipe 14 at the lower side of the housing 10, is wet-cleaned and then discharged to the outside of the housing 10 through the open upper end of the housing 10 do.

In this case, it is preferable that a demister 16 is provided on the upper side of the housing 10 in order to remove moisture contained in the exhaust gas. The structure and material of the mist 16 for trapping and removing moisture contained in the exhaust gas are already known in the field of gas processing technology, and a detailed description thereof will be omitted here for simplification of the description.

In the housing 10 described above, multi-pipe filters 20, 20a, 20b and 20c are provided. The multi-pipe filters 20, 20a, 20b and 20c maximize the area of the exhaust gas flowing into the housing 10 in contact with the washing water, and form a flow plate type filter body having a specific cell structure flowing down the wash water And a plurality of pipes 21, 21a, 21b, and 21c are formed as a whole, and are fixed to the inner wall of the housing 10.

3, the multi-pipe filter 20 has a structure in which a plurality of pipes 21 having a circular cross-section are connected to each other by a connecting partition 22 arranged at 90 degree intervals .

In this case, not only a plurality of pipes 21 each having a circular cross section form a flow path of the exhaust gas, but also a pipe which is surrounded by four pipes 21 and a connecting partition wall 22 adjacent to each other, A flow passage is formed.

The internal area of one pipe 21 is defined by four pipes 21 adjacent to each other and the inside of the pipe surrounded by the connecting partition 22 so as to ensure a uniform flow of the exhaust gas through the multi- It is preferable that it is formed to be equal to the area.

The diameter and length of the pipe 21 forming the multi-pipe filter 20 and the separation distance (distance) between the connection partition 22 and the like can be changed in consideration of resistance such as differential pressure. For example, as the diameter and spacing of the pipe 21 are reduced and the length of the pipe 21 and the connecting partition wall 22 is increased, dust removal efficiency and gas cooling efficiency by the washing water are increased, but resistance such as differential pressure is also increased. The diameter and length of the pipe 21 and the separation distance (spacing) between the connection partition 22 and the pipe 21 should be determined in consideration of dust removal efficiency and resistance against gas cooling efficiency.

Further, as shown in Fig. 5 (a), the multi-pipe filter 20a has a structure in which six pipes 21a having a hexagonal cross-section are connected to form a hollow portion having a hexagonal cross section therein.

As shown in FIG. 5 (b), the multi-pipe filter 20b has a structure in which a plurality of pipes 21b having a triangular cross section are connected to each other by a connecting partition 22, The filter 20c has a structure in which a plurality of pipes 21c having a rectangular cross section are connected to each other by the connecting partition 22 as shown in Fig. 5 (c).

In the above-described housing 10, a cleaning water injection nozzle 30 is provided. The cleaning water injection nozzle 30 serves to spray cleaning water for wet cleaning of the exhaust gas from the upper part of the multi-pipe filters 20, 20a, 20b and 20c. A water supply line and a pump installed on the cleaning water supply line for forcedly feeding the washing water are separately connected.

The washing water sprayed from the washing water spraying nozzle 30 is supplied to the pipes 21, 21a, 21b and 21c forming the multi-pipe filters 20, 20a, 20b and 20c and the inner and outer surfaces of the connecting partition wall 22 And forms a water film which is in contact with the exhaust gas while flowing down. At this time, the pipes (21, 21a, 21b, 21c) and the connecting partition wall (22) form a kind of water flow plate flowing down with washing water. As the washing water flows along the inner and outer surfaces of the pipes 21, 21a, 21b and 21c constituting the multi-pipe filters 20, 20a, 20b and 20c and the connecting and partitioning walls 22, The gas flow can be promoted at the time of contact of the gas, and the dust removal efficiency can be further increased.

Although the washing water sprayed from the washing water spray nozzle 30 is preferably water, it may be a basic water for neutralization treatment.

Hereinafter, the overall operation of the wet-type purifier according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5 as follows:

The wet-type filtering apparatus according to an embodiment of the present invention may include a large-sized dust discharge facility such as a thermal power plant for burning fossil fuel, a steel mill, an incinerator or the like, or an exhaust pipe 3a of a small dust discharge facility such as, for example, And collects and removes the air pollutants and dust contained in the exhaust gas and cools the exhaust gas.

20a, 20b, 20c, when the wet-type filtering apparatus according to the embodiment of the present invention is connected to the exhaust pipe 3a of the dust exhausting apparatus, 20a, 20b, 20c of the multi-pipe filters 20, 20a, 20b, 20c to which the plurality of pipes 21, 21a, 21b, 21c are connected, So that dust removal efficiency and gas cooling efficiency can be greatly improved without replacement due to the color of the filter as the wet cleaning and cooling of the exhaust gas is performed.

Further, as the washing water is shaken when the washing water flows down along the pipes 21, 21a, 21b, and 21c forming the multi-pipe filters 20, 20a, 20b, and 20c and the inner and outer surfaces of the connecting partition 22, The gas flow can be promoted at the time of contacting the exhaust gas, and the dust removal efficiency can be further increased.

In addition, the diameters and intervals of the pipes 21, 21a, 21b and 21c forming the multi-pipe filters 20, 20a, 20b and 20c can be adjusted to reduce the differential pressure, And the length of the multi-pipe filters 20, 20a, 20b, and 20c may be increased to increase dust removal efficiency.

6 is a structural view of an embodiment of an exhaust gas purifying system including a wet purifying filtering apparatus according to an embodiment of the present invention.

An exhaust gas purifying system including a wet purifying filtering apparatus according to an embodiment of the present invention includes a wet purifying filtering apparatus of the above-described structure, a cooling heat exchanger connected to the downstream of the wet purifying filtering apparatus, And a flocculation filter connected downstream of the flue gas to remove super dust and white smoke.

Hereinafter, the relationship between the components of the exhaust gas purifying system including the wet-type purifying filter according to an embodiment of the present invention and the components thereof will be described in detail with reference to FIG.

The wet cleaning filter apparatus includes a housing 10, a multi-pipe filter 20, 20a, 20b, 20c and a washing water injection nozzle 30 provided inside the housing 10. More specifically, the upper end of the housing 10 is closed, An inflow pipe 11 to which an exhaust pipe 3a is connected is connected to one side of an upper portion of the housing 10 and a discharge pipe 12 is connected to a lower side of the housing 10, To the water collecting tank (5) is connected to the drain pipe (13). The wet-type purifying filter device has already been described in detail, and a further explanation will be omitted.

For the construction of the exhaust gas purifying system including the wet purifying filtering apparatus according to the embodiment of the present invention, the cooling heat exchanger 40 is connected to the downstream side of the wet purifying filtering apparatus.

The cooling heat exchanger (40) connected downstream of the above-described wet purifying filtering device is a device for cooling the exhaust gas that has been wet-rinsed and cooled by the wet-type purifying filter device according to an embodiment of the present invention And can be formed into various types of known heat exchangers such as fin tube type and double tube type.

The chiller 41 for cooling and circulating the refrigerant is separately connected to the cooling heat exchanger 40. The structure and operation of the chiller 41 are already well known in the art, Is omitted.

The condensing filter 50 is connected downstream of the cooling heat exchanger 40 described above. The coagulation filter 50 serves to remove fine dust and white smoke finally after the cooling process by the cooling heat exchanger 40 and prior to the atmospheric release, and can be formed by a conventional multistage filter bag structure.

Further, between the cooling heat exchanger (40) and the coagulation filter (50), a dehydrator (60) for removing moisture contained in the exhaust gas may be additionally provided.

The above-described cooling heat exchanger 40, the coagulation filter 50, and the demister 60 can be arranged in the vertical direction along one housing. In this case, it is preferable that the cooling heat exchanger 40, the demister 60, and the flocculation filter 50 are arranged in this order from bottom to top in this order.

Hereinafter, the overall operation of the exhaust gas purifying system including the wet-type purifying filter according to the embodiment of the present invention will be described with reference to FIG.

The exhaust gas purifying system including the wet-type purifying filtering apparatus according to an embodiment of the present invention may include a large dust exhausting facility (not shown) such as a thermal power plant for burning fossil fuel, a steel mill, an incinerator or the like, And is connected to an exhaust pipe 3a of a small dust exhausting facility (not shown) to collect and remove air pollutants and dust contained in the exhaust gas and cool the exhaust gas.

When the exhaust gas purifying system including the wet purifying filtering apparatus according to the embodiment of the present invention is connected on the exhaust pipe route 3a of the dust exhausting apparatus, The washing water sprayed by the washing water spray nozzle 30 which is located on the inner surface of the housing 20 flows down along the inner and outer surfaces of the multi-pipe filters 20, 20a, 20b and 20c to which a plurality of pipes (not shown) So that the wet cleaning and the cooling of the exhaust gas are performed. Therefore, the dust removing efficiency and the gas cooling efficiency can be greatly improved without replacement due to the clogging of the filter have.

The exhaust gas, which is wet-cleaned by the wet-purifying filter apparatus and simultaneously cooled at first, is secondarily cooled while passing through the cooling heat exchanger (40) connected downstream of the wet-type filtering apparatus. The exhaust gas passing through the cooling heat exchanger 40 is discharged through the demister 60 while moisture is removed and the fine dust and white smoke are removed through the coagulation filter 50.

7 is a schematic structural view of an exhaust gas purifying system including a wet purifying filtering apparatus according to another embodiment of the present invention.

The exhaust gas purifying system including the wet purifying filtering apparatus according to another embodiment of the present invention is characterized in that the internal space is partitioned into a lower layer portion, an intermediate layer portion and an upper layer portion by a first partition plate and a second partition plate, And an exhaust pipe connected to the exhaust pipe of the dust exhausting unit. The exhaust pipe is provided at one side of the middle layer, and a vertical communication pipe for communicating the lower portion and the upper portion is provided at the center of the first and second partition plates. A mist spray nozzle connected to the housing and spraying water in the form of a mist at an upper portion of the inflow pipe; and a mist spray nozzle disposed at a lower end of the housing to communicate with the middle layer, And a plurality of exhaust pipes arranged at predetermined angular intervals along a circle around the upper and lower communication pipes of the housing, A multi-pipe filter connected to the upper end of the upper and lower communicating pipes of the housing and extending vertically and surrounded by the collecting filter and having a plurality of pipes connected to each other; And a washing water spraying nozzle disposed above the inside of the housing and spraying washing water from an upper portion of the multi-pipe filter.

Hereinafter, the relationship between the components of the exhaust gas purifying system including the wet-type purifying filter according to another embodiment of the present invention and the components thereof will be described in detail with reference to FIG.

As shown in FIG. 7, the exhaust gas purifying system including the wet-type purifying filtering apparatus according to another embodiment of the present invention may include a large dust exhausting facility 3 such as a thermal power plant, a steel mill, an incinerator or the like, Which is connected to the exhaust duct 3a of the small dust exhausting apparatus 3 such as the exhaust duct 3 to remove air pollutants contained in the exhaust gas discharged from the dust exhausting apparatus 3 and dust and odor, A multipass filter 140, and a rinse water injection nozzle 150. The mist spray nozzle 120 is provided with a dust collecting filter 130,

Here, the housing 110 forms the main body frame of the exhaust gas purifying system including the wet-type purifying filter according to another embodiment of the present invention, and the first partition plate 111 and the second partition plate 112 to form a lower layer portion 110a, an intermediate layer portion 110b and an upper layer portion 110c.

The lower layer portion 110a forms a collecting space for primarily collecting and removing dust from the exhaust gas flowing into the exhaust pipe 3a of the dust exhausting facility 3. The upper layer portion 110c forms a collecting space for collecting dust from the lower layer portion 110a And the middle layer portion 110b forms a filtering space for collecting ultrafine dust or moisture that has not been captured in the secondary through filtering. The middle layer portion 110b forms an exhaust space for ultimately discharging exhaust gas, .

In addition, an inlet pipe 113 is provided at one side of the upper portion of the lower layer portion 110a of the housing 110. [ The inflow pipe 113 allows the exhaust gas discharged from the dust exhausting facility 3 such as a bean roaster to flow into the housing 110 for the wet cleaning and the smelting treatment, (3a) of the exhaust pipe (3).

The inlet pipe 113 may be formed as a simple pipe that allows only the exhaust gas discharged from the dust exhausting facility 3 to flow into the housing 110. In particular, when the exhaust gas is introduced, As shown in Fig. It is preferable that the outer tube 113a for introducing the outside air out of the double tube type inlet tube 113 has a shape that is expanded outward so that the outside air can be easily introduced.

When the outside air is simultaneously introduced into the housing 110 at the time of introducing the exhaust gas through the inlet tube 113 of the double pipe type, the internal linear velocity is increased by the increase of the inflow amount due to the outside air, As well as the internal differential pressure generated by the exhaust fan 114b of the discharge pipe 114 and the exhaust fan of the dust exhausting facility 3 are automatically eliminated, the internal temperature of the dust exhausting facility 3 can be kept constant have. Therefore, the flavor of roasted coffee beans can be kept constant when the dust exhausting facility 3 is a bean roaster.

The inflow pipe 113 is preferably disposed at one side with respect to the center line of the cross section of the housing 110 so that the cyclone dust collecting phenomenon by the vortex is induced in the lower layer portion 110a of the housing 110. [

Further, a discharge pipe 114 is provided at one side of the middle layer portion 110b in the housing 110. [ The exhaust pipe 114 finally discharges the exhaust gas that has been collected in the housing 110 to the outside, and the exhaust fan 114b is provided therein.

It is also preferable that the discharge tube 114 includes an inclined cutout 114a that is inserted into the middle layer portion 110b of the housing 110 as shown in detail in FIG. 7 and is sloped downward to prevent clogging. The discharge tube 114 can prevent the inlet from being clogged by the moisture containing the ultrafine dust falling in the collecting filter 130 which will be described later by forming the inclined cutout 114a.

The upper and lower communication pipes (115) are connected to the center of the first partition plate (111) and the second partition plate (112). The upper and lower communicating tubes 115 communicate with the lower and upper portions 110a and 110c in the housing 110 so that the exhaust gas that is primarily collected in the lower layer portion 110a through the cyclone dust collects in the lower portion 110a, The lower end of the first partition plate 111 extends downward through the center of the first partition plate 111 and the upper end of the second partition plate 112 passes through the center of the second partition plate 112. [ The upper and lower communicating tubes 115 are also used as a supporting frame for installing the multi-pipe filter 140 to be described later.

A drain pipe 116 is provided at a lower portion of the housing 110. It is preferable that the drain pipe 116 is formed so that the vortex caused by the cyclone dust collecting becomes narrower toward the bottom so as to become stronger as it goes downward.

A water collecting tank (5) is provided below the water pipe (116). The water collecting tank 5 is a storage space in which a mixture of a falling object, that is, a mixture of dust and moisture (including a washing liquid), discharged through a drain pipe 116 of the housing 110 at the time of primary cyclone dust collection in the lower layer portion 110a And is preferably formed in the form of a water tank that can be loaded on the vehicle and can be moved.

The mist injection nozzle 120 is connected to the housing 110 through the through-hole. The mist spraying nozzle 120 injects water in the form of a mist at the upper portion of the inflow pipe 113 so that the cyclone dust collecting at the lower layer portion 110a is wetted to increase the specific gravity by the mist, And at the same time, the exhaust gas flowing into the lower layer portion 110a is primarily wet-cleaned to remove the smell and provide a cooling effect.

The mist spray nozzle 120 is connected to a water supply source (not shown) such as a water tank, for example, and is connected by a connection pipe provided with a pump (not shown) for injecting high pressure.

A collection filter 130 is provided on the second partition plate 112 of the housing 110 described above. The collection filter 130 collects ultrafine dust and moisture from the exhaust gas flowing into the upper layer portion 110c through the upper and lower communicating tubes 115 after being subjected to the primary collection of the cyclone system in the lower layer portion 110a, Layer portion 110b, and is preferably formed of a conventional coalescing filter.

When the trapping filter 130 is formed of a coalescing filter, a water film is formed inside the trapping filter 130 by the moisture collected from the exhaust gas flowing into the inside, So that the life of the trapping filter 130 can be increased.

It is preferable that a plurality of collecting filters 130 are arranged around the upper and lower communicating tubes 115 at regular angular intervals along a circle. In the second partition plate 112 for arranging the collection filters 130, a plurality of through holes are formed around the connection portion of the upper and lower communication pipes 115 at regular angular intervals along the circle.

A multi-pipe filter 140 is coupled to the upper end of the upper and lower communication pipes 115 of the housing 110 to extend vertically. In the multi-pipe filter 140, the multi-pipe filter 140 is installed in the housing 110 to maximize the contact area of the exhaust gas with the washing water, and at the same time, And a plurality of pipes 141 are formed as a whole.

The lower end of the multi-pipe filter 140 is fixed to the upper end of the upper and lower communicating pipe 115 and extends upward, and is surrounded by the collecting filter 130.

The multi-pipe filter 140 has a structure in which a plurality of pipes 141, which are formed by circular pipes as shown in the upper part of FIG. 7, are spaced apart from each other by a connecting partition 142 arranged at 90- .

In this case, not only the plurality of pipes 141 form the flow passages of the exhaust gas, but also the flow passages of the exhaust gas are formed by the tubes surrounded by the four pipes 141 and the connecting partition 142 adjacent to each other .

The internal area of one pipe 141 is set to be equal to the inside of the pipe surrounded by the four pipes 141 and the connecting partition wall 142 adjacent to each other so as to ensure a uniform flow of the exhaust gas through the multi- It is preferable that it is formed to be equal to the area.

The diameter and length of the pipe 141 forming the multi-pipe filter 140, and the separation distance (interval) between the connection partition 142 and the like can be changed in consideration of resistance such as differential pressure.

The pipe 141 forming the multi-pipe filter 140 may have a structure in which six pipes, although not shown, having a hexagonal cross-section are connected to form a hollow portion having a hexagonal cross section therein, The plurality of pipes may have a structure in which they are spaced apart from each other by a connecting partition wall and a plurality of pipes having a rectangular cross section may be connected to each other by a connecting partition wall.

A cleaning water injection nozzle 150 is provided on the inner side of the housing 110 described above. The cleaning water injection nozzle 150 serves to spray cleaning water for wet cleaning of the exhaust gas from the upper portion of the multi-pipe filter 140. The cleaning water tank 150 is connected to a cleaning water supply pipe connected to the cleaning water tank, A pump installed on the water supply pipe for forcedly feeding the washing water is separately connected.

The washing water injected from the washing water injection nozzle 150 flows down the pipe 141 forming the multi-pipe filter 140 and the inner and outer surfaces of the connecting partition wall 142 to form a water film which is in contact with the exhaust gas do. At this time, the pipe 141 and the connecting partition 142 form a water flow plate which flows down with the washing water. As the washing water flows down along the inner and outer surfaces of the pipe 141 and the connecting partition wall 142 constituting the multi-pipe filter 140, a water film is formed, which accelerates the gas flow during the contact of the exhaust gas, The efficiency can be further increased.

Hereinafter, the overall operation of the exhaust gas purifying system including the wet purifying filtering apparatus according to another embodiment of the present invention will be described with reference to FIG.

The exhaust gas discharged from the exhaust pipe 3a of the dust exhausting apparatus 3 such as a beanstarter is introduced into the lower portion 110a of the housing 110 through the inlet pipe 113 and discharged to the lower drain pipe 116, A vortex for the cyclone collection is formed. At this time, the mist is injected in the inflow direction of the exhaust gas by the mist injection nozzle 120, the high temperature exhaust gas is cooled together with the wet cleaning, and the fine dust is adsorbed on the mist and the specific gravity is increased, It becomes stronger. The wastewater containing various foreign substances including the fine dust and the odor inducing factor is dropped to the bottom, stored in the water collecting tank (5), and treated with wastewater.

The exhaust gas that has been subjected to the wet capturing by the cyclone method according to the mist injection rises toward the upper layer portion 110c through the upper and lower communicating tubes 115. At this time, the washing water spraying nozzle 150, The cleaning water sprayed by the plurality of pipes 141 flows down along the inner and outer surfaces of the multi-pipe filter 140 formed by the plurality of pipes 141 separated from each other by the connecting partition 142, So that the second wet scrubbing and cooling of the exhaust gas can significantly improve the dust removing efficiency and the gas cooling efficiency without replacement due to the clogging of the filter.

 The exhaust gas flowing through the multi-pipe filter 140 and flowing into the upper layer portion 110c flows into the trapping filter 130, and ultrafine dust and moisture are secondarily trapped and removed, and flows into the middle layer portion 110b through the lower end And finally discharged to the outside through the discharge pipe 114. [

As described above, in the exhaust gas purifying system including the wet-type purifying filter according to another embodiment of the present invention, external air is sucked simultaneously with the inflow of the exhaust gas from the dust exhausting facility 3 by the inflow pipe 113 having the double- The fine dust is firstly captured by the strong cyclone dust collecting and at the same time, the generation of the internal differential pressure is prevented, and the mist is sprayed by the mist spraying nozzle 120 when the exhaust gas is introduced, The exhaust gas is wet-cleaned and cooled simultaneously with the water film of the washing water flowing down through the multi-pipe filter 140. The ultrafine dust and moisture not collected are collected by the trapping filter 130, The effect of removing dust and moisture can be maximized. Also, since the inflow pipe 113 is formed as a double pipe structure, external air can be prevented from being generated when the exhaust gas is introduced into the dust exhausting apparatus 3 at the same time.

It is to be understood by those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope of the invention, It is therefore intended that the above-described embodiments be considered as illustrative rather than restrictive, and that all implementations within the scope of the appended claims and their equivalents are intended to be included within the scope of the present invention.

3: Dust extraction equipment
3a: By exhaust pipe
5: Water collecting tank
10: Housing
11: Inflow pipe
12: discharge pipe
13: Water pipe
14: inlet pipe
15: Water pipe
16: Demister
20, 20a, 20b, 20c: multi-pipe filter
21, 21a, 21b, 21c: pipe
22: connecting bulkhead
30: Cleaning water injection nozzle
40: cooling heat exchanger
41: Chiller
50: Coagulation filter
60: Demister
110: Housing
110a: Lower layer
110b: middle layer portion
10c: upper layer
111: first partition plate
112: second partition plate
113: inlet pipe
113a: outer tube
114: discharge pipe
114a:
114b: exhaust fan
115: Upper and lower communicating tube
116: Water pipe
120: mist spray nozzle
130: collection filter
140: Multipipe filter
141: pipe
150: Cleaning water injection nozzle

Claims (8)

delete delete delete delete delete delete delete The inner space is partitioned into a lower layer portion 110a, an intermediate layer portion 110b and an upper layer portion 110c by the first partition plate 111 and the second partition plate 112, and dust is discharged to one side of the upper portion of the lower layer portion 110a And an inlet pipe 113 connected to the exhaust pipe 3a of the facility 3 is provided and a discharge pipe 114 is provided at one side of the middle layer portion 110b and the first and second partition plates 111, A housing 110 having a vertically communicating pipe 115 communicating the lower portion 110a and the upper portion 110c and having a drain pipe 116 at a center thereof;
A mist spray nozzle 120 connected to the housing 110 and spraying water in the form of mist from an upper portion of the inlet pipe 113;
A lower end of the housing 110 is disposed on the second partition plate 112 so as to communicate with the middle layer portion 110b and a plurality of portions are formed around the upper and lower communicating tubes 115 of the housing 110 at regular angular intervals A collection filter (130) arranged in the upper layer part (110c) and collecting dust and moisture from the exhaust gas flowing into the upper layer part (110c) and providing the dust and moisture to the middle layer part (110b);
A multi-pipe filter 140 coupled to an upper end of the upper and lower communicating tubes 115 of the housing 110 and extending vertically and surrounded by the collecting filter 130 and having a plurality of pipes 141 connected thereto; And
And a washing water injection nozzle (150) provided above the housing (110) and spraying washing water from an upper portion of the multi pipe filter (140).

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