KR200465750Y1 - PM collector using DPF - Google Patents

Abstract

The present invention provides an efficient dust collector for treating soot containing a large amount of ash, and uses a conventional monolith filter, but is further equipped with a foam filter in an upstream region, and the foam filter ensures exhaust gas flowability. In order to reduce the load of the monolith filter, it is possible to reduce the load of the monolith filter by double filtering the exhaust gas containing a large amount of ash components. It is possible to use a double filtration device, but by using a spiral or repeated isolation foam filter to overcome the unreasonable pressure difference between the inlet and exhaust gas, it is easy to maintain the dust collector.

Description

Dust collector with DPF {PM collector using DPF}

The present invention relates to an apparatus for collecting fine particles contained in exhaust gas discharged from various operations such as incineration and heating. In particular, the present invention relates to a dust collector which is particularly effective when the exhaust gas contains fine particles containing a large amount of ash components.

Diesel Particulate Filter (DPF) is used as a diesel engine particulate filter. In diesel engine combustion, a large amount of soot including particulate matter is generated. Since particulate matter (PM) is more than 75% of fine particles less than 1μm in diameter, soot can penetrate the bronchus for a long time, so a soot filtration device is applied to remove it. Various filters are used, but representative examples include a ceramic monolith filter and a foam fileter. The monolith filter has a cylindrical shape, the cross section is circular, elliptical, etc., and small triangular or square channels are arranged in a honeycomb. The channel inlet and outlet are alternately blocked, and the exhaust gas flowing into the channel inlet is blocked by the channel outlet so that it passes through the porous wall and exits to the neighboring channel outlet. Particulate matter remains in the inlet channel. The captured PMs are burned as soon as possible and then regenerated so that the filter can capture them again. On the other hand, the foam filter is a filter made of a foam of a metal such as nickel, iron, or an alloy based on them, by depositing a metal material on the surface of the organic porous body after manufacturing the conductive porous body through the electroplating solution to plate the metal and heat treatment Thereby removing an organic component and forming a metal into a porous body to form a metal foam. If necessary, after the metal powder coating and heat treatment to increase the surface roughness (surface roughness), a metal porous body capable of coating a catalyst or the like is produced.

However, when a large amount of ash components that are not incinerated and regenerated in the particulate matter, as in the case of a marine boiler, there is a problem that it is difficult to process the soot contained in the exhaust gas only with a conventional DPF (hereinafter, monolith filter or foam filter). . In order to solve this problem, an electrostatic precipitator and a filter dust collector have been devised, but the electrostatic precipitator requires an electrical facility for ionizing particulate matter. There was a limit to.

The present invention provides an efficient device for treating soot containing a large amount of ash components. The dust collector according to the present invention uses a conventional monolith filter, but is further equipped with a foam filter in the upstream region, and the foam filter is repeatedly installed in a spiral or vertical isolation centering around the DPF to secure exhaust gas flowability. It is done.

The dust collector according to the present invention comprises a cylindrical outer case having an exhaust gas inlet and a cylindrical inner case embedded therein. At least one monolith filter is disposed in the inner case in parallel along the longitudinal direction, and an exhaust gas discharge passage is formed at the rear end of the inner case, and a foam filter mounted spirally along the length direction at the outer circumference of the cylindrical case. In this case, the spiral foam filter may be mounted from the front end to the bottom along the outer circumference of the inner case. According to another type of dust collector according to the present invention, the foam filter is distinguished from the foam filter, and the foam filter has a saddle shape so that the outer periphery of the cylindrical inner case is not spiral, and one end is mounted on the inner surface of the outer case and the other end is It is installed to be spaced apart from the inner surface of the opposite outer case.

Other features of the present invention are not limited, but one side of the outer case is further provided with a fine particle extraction space, the rear end of the monolith filter is further provided with a blowing means having a plurality of blower stages to provide compressed air. Finally, a back pressure sensor having sensing stages on one side of the exhaust passage and one side of the exhaust gas inlet may be further installed.

The dust collector according to the present invention can reduce the monolith filter load load by doubling the exhaust gas containing a large amount of ash components, thereby extending the life of the monolith filter, and using a double filtration device, but using a spiral or repeated isolation type. The use of foam filters makes it easier to maintain the dust collector by overcoming unreasonable pressure differences between inlet and outlet gases.

1 is a schematic side cross-sectional view of a dust collecting device according to Embodiment 1 of the present invention.
2 is a schematic front sectional view of the first embodiment.
3 is a schematic side cross-sectional view of a dust collecting device according to Embodiment 2 of the present invention.
4 is a schematic front sectional view of the second embodiment.

In the present invention, the soot filtration device DPF should be understood to mean a monolith filter and a foam filter. In addition, the monolith filter and the foam filter may be coated with catalyst components including an oxidation catalyst. The catalyst-coated DPF can assist in filter regeneration by oxidizing the collected particles when the exhaust gas reaches an appropriate temperature.

The dust collector according to the present invention uses a conventional DPF, but is further equipped with a foam filter in an upstream region, and the foam filter is repeatedly mounted spirally or vertically spaced around the DPF to secure exhaust gas flowability. By medium filtration, the fine particles including the ash component are primarily filtered by the foam filter, and the second particles passing through the foam filter are secondly filtered by the DPF. At this time, the foam filter used in the primary filtration treatment to ensure the exhaust gas fluidity is characterized in that it is mounted in a spiral or vertical spaced repeat.

Example  One

1 and 2, the dust collector 10 according to the present invention is composed of a cylindrical outer case 200 having an exhaust gas inlet 50 and a cylindrical inner case 100 embedded therein. At least one monolith filter 110 is disposed in the inner case 100 in parallel along the longitudinal direction. The monolith filter is a cylinder of a circular cross section or a rectangular parallelepiped shape, and a small rectangular channel is arranged in a honeycomb in cross section. The monolith filter and the foam filter are commercially available parts and detailed descriptions are omitted because no special processing is applied in the present invention. Referring to FIG. 2, four monolithic filters 110 are shown as juxtaposed but there is no limit to the number of monolithic filters 110 arranged. The inner case 100 has only a path for juxtaposing the monolith filter, and after the monolith filter is installed, the inner case 100 has a passage or hole through which the exhaust gas enters, except for the passage provided by the monolith filter. Not formed. On the other hand, a discharge passage 300 through which the exhaust gas passing through the monolith filter 110 is formed at the bottom of the inner case 100, and the discharge passage may be discharged to the outside by passing through one surface of the outer case 200.

Meanwhile, the foam filter 150 is mounted around the cylindrical inner case 100. The foam filter is spirally wound around the inner case, so that the exhaust gas entered at the exhaust gas inlet 50 flows along the exhaust gas traveling path formed by the foam filter 150. Referring to Figure 1, the foam filter 150 is preferably installed to spirally wrap the inner case along the inner case longitudinal direction from the bottom to the top of the inner case 100. The commercially available foam filter is given a processability to change the shape as necessary, it can be mounted to spirally wound the inner case along the longitudinal direction of the inner case 100 as described above.

In addition, one side of the outer case 200 may be a fine particle extraction space 270 is installed. Referring to FIG. 1, a tray-shaped take-out space may be formed at a lower portion along a position where the foam filter 150 is in contact with the inner surface 250 of the outer case. According to FIG. 1, the extraction space is divided according to the dividing wall 260. Meanwhile, a blower means 400 having a plurality of blower stages 410 capable of providing compressed air may be further provided at a downstream point of the monolith filter 110 to release the fine particles accumulated in the monolith filter to the outside. . At this time, the rear wall 240 facing the monolith filter 110 is provided to be opened in a blowing cycle. In addition, a back pressure sensor 450 having sensor stages may be further installed at one side of the discharge passage 300 and one side of the exhaust gas inlet 50. Therefore, the pressure difference may be periodically checked to operate the blower 400 as necessary to discharge the fine particles deposited on the monolith filter.

Example  2

A second embodiment will be described with reference to FIGS. 3 and 4, but the same elements will not be repeated. In this example, a plurality of foam filter 150 is installed inside the outer case 200, is mounted up and down to surround the inner case 100 and one end to form an exhaust gas path. Specifically, one end of the saddle-shaped foam filter 150 is attached to one side of the outer case inner surface 250, the inner case 100 is seated inside the saddle profile, and the other end of the foam workplace is installed to be spaced apart from the inner side facing the outer case. . Through this configuration, the exhaust gas including the fine particles entered from the inlet 50 may be moved along the path formed by the foam filter 150 in the arrow direction shown in FIG. 3.

Hereinafter, an operation process of the dust collector of the present invention will be described with reference to Example 1.

Exhaust gas containing a large amount of ash enters through the dust collector 10 inlet 50. Exhaust gas flowing along the entry straight path impacts the helical foam filter 150. The fine particles may be filtered through the foam filter and pass through the foam filter at the point of impact, or may move along a path formed by the foam filter 150. In Fig. 1, this exhaust gas flow direction is indicated by an arrow. The fine particles deposited on the bottom of the outer case while passing through the foam filter may be taken out through the tray-shaped take-out space. On the other hand, the exhaust gas moved to the end of the outer case space passes through the monolith filter 110, the secondary particles are collected in the filter secondary, the exhaust gas from which the fine particles are removed is carried out to the outside through the discharge passage (300) do. The back pressure sensor 450 provides a difference between the inflow and exhaust gas pressures, and thus, the fine particles accumulated in the monolith filter by the blower 400 may be discharged to the outside.

As described above in detail a specific part of the present invention, it is apparent to those skilled in the art that such a specific technology is only a preferred embodiment, and the scope of the present invention is not limited thereto. For example, the embodiment of the present invention exemplifies the superposition configuration of the monolith filter and the foam filter in order to manufacture the dust collector compactly, but if there is room in the installation space, the foam filter is installed upstream and the monolith filter is downstream. Of course, it can be installed in a structure in which the exhaust gas can be linearly flowed by mounting in a row without overlapping in mounting. Such foam filter and monolith filter mounting arrangements are within the scope of the present invention, and therefore the substantial scope of the present invention will be defined by the appended claims and their equivalents.

10: dust collector, 50: exhaust gas inlet, 100: inner case, 110: monolith filter,
150: foam filter, 200: outer case, 240: rear wall, 250: inner case,
260: dividing wall, 270: extraction space, 300: exhaust gas discharge passage, 400: blowing means,
410: blower stage 450: back pressure sensor

Claims (7)

It consists of a cylindrical outer case 200 having an exhaust gas inlet 50 and a cylindrical inner case 100 embedded therein, one or more monolith filter 110 is arranged in parallel in the longitudinal direction inside the inner case 100 The rear end of the inner case 100 is formed with a discharge passage 300 through which the exhaust gas passing through the monolith filter 110 is formed, and a foam filter 150 mounted spirally along the longitudinal direction on the outer circumference of the cylindrical inner case 100. ), DPF applied dust collector (10). delete The dust collecting device (10) according to claim 1, wherein the foam filter (150) is helically mounted from the front end to the bottom end along the inner case outer periphery. The dust collecting apparatus (10) to which the DPF is applied to one surface of the outer case (200). The dust collecting apparatus (10) of claim 1, further comprising a blowing means (400) having a plurality of blowing stages (410) capable of providing compressed air at a rear end point of the monolith filter (110). . The dust collecting apparatus (10) according to claim 1, further comprising a back pressure sensor (450) having sensing stages on one side of the exhaust passage (300) and one side of the exhaust gas inlet (50). The dust collecting device (10) to which the DPF is applied according to claim 1, characterized in that the catalyst is coated on the monolith filter (110) and the foam filter (150).

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