KR102420027B1 - Silencer complex type exhaust gas treatment apparatus - Google Patents

Abstract

The present invention relates to a silencer complex type smoke reduction apparatus capable of effectively absorbing and reducing noise, such as vibration noise, resonance noise, and the like, by installing a silencer inside a diesel particulate filter (DPF) main body. The silencer complex type smoke reduction apparatus comprises: a DPF main body which has a purification space formed therein and an inlet pipe and an outlet pipe respectively provided at an end and the other end to communicate with the purification space; a purification unit installed in the purification space of the DPF body to reduce particulate matters contained in harmful exhaust gas during a process of discharging the harmful exhaust gas introduced through the inlet pipe to the outlet pipe; and a noise reduction unit which is separated from the purification unit and is installed at the front end of the purification unit in the purification space of the DPF body to absorb and reduce vibration and noise during the process of the harmful exhaust gas passing through the noise reduction unit.

Description

Silencer Composite Smoke Reduction Device {SILENCER COMPLEX TYPE EXHAUST GAS TREATMENT APPARATUS}

The present invention relates to a silencer complex type soot reduction device configured to more effectively absorb and reduce noise, such as vibration and resonance, by mounting a silencer inside the DPF body.

In general, large buildings, hospitals, and factories are equipped with emergency generators to prevent damage caused by power failure due to power outages, etc., and the emergency generator uses a diesel engine to drive the generator to provide electricity for driving necessary equipment. made to produce

Although the diesel engine has excellent thermal efficiency, it is configured with a soot reduction device that removes and reduces the soot in the exhaust gas as harmful substances such as particulate matter (PM) are excessively discharged and cause air pollution.

A conventional smoke reduction device includes a housing configured to pass exhaust gas discharged from an emergency generator or industrial diesel engine, and a soot collecting filter and an electric heater (fin heater and coil) are installed inside the housing.

On the other hand, a conventional smoke reduction device generates a strong explosion sound when gas is discharged from an emergency generator or industrial diesel engine to the outside.

However, in the case of a silencer installed in a conventional smoke reduction device, the noise of a diesel engine can only be reduced, and as the exhaust gas is emitted as it is, a method of connecting the smoke reduction device and the silencer in series and mounting it on the engine has been used. There was a problem in that the installation space is required and the installation is not easy.

In order to solve this problem, an attempt has been made to combine a smoke reduction device and a silencer in one piece, but due to the limited space conditions of the housing, the noise reduction performance is very poor, and it is not suitable for reducing the smoke and noise of large industrial diesel engines. There was a problem that it wasn't.

Unexamined Patent Publication No. 10-2014-0098453 (published on Aug. 8, 2014)

Accordingly, it is an object of the present invention to provide a silencer complex type soot reduction device configured to effectively absorb and reduce noises such as vibration and resonance sounds while not being limited by installation space by mounting a silencer inside the DPF body. will be.

As a means for solving the above problems, the silencer complex type soot reduction device of the present invention (hereinafter referred to as "the device of the present invention") has a purification space provided therein, and an inflow communicating with the purification space at one end and the other end, respectively DPF body portion provided with a pipe and a discharge pipe; a purification processing unit installed in the purification space of the DPF body to reduce particulate matter contained in the harmful exhaust gas while the harmful exhaust gas introduced through the inlet pipe is discharged to the exhaust pipe; and a noise reduction unit that is spaced apart from the front end of the purification processing unit in the purification space of the DPF body and absorbs and reduces vibration and noise while the introduced harmful exhaust gas passes.

As an example, the noise reduction unit may include: a baffle chamber having an inner space and installed in a vertical direction in the purification space of the DPF body; A plurality of through-holes are inserted in the center of the baffle chamber in the horizontal direction and communicated with the inner space are formed on the outer periphery, one surface facing the inlet pipe is opened in a state exposed to the purification space, and facing the purification processing unit One or more perforated pipes to which the other surface is sealed; and a plurality of baffle holes formed through both sides of the baffle chamber to surround the periphery of the perforated pipe, respectively, and communicating with the inner space.

As an example, the purification processing unit is installed in a vertical direction at the rear end of the noise reduction unit in the purification space of the DPF main body to divide the purification space into an inflow space and an exhaust space, and a plurality of mounting holes are spaced apart in the horizontal direction. a mounting chamber formed; and a purification filter module that is inserted and installed to be detachably attached to the selected mounting hole of the mounting chamber and collects and discharges particulate matter contained in harmful exhaust gas.

As an example, a bypass valve mounted on the selected mounting hole of the mounting chamber and opened when the pressure in the inlet space is greater than or equal to a preset pressure to bypass the exhaust gas of the inlet space to the outlet space; further comprising is characterized.

As an example, the bypass valve may include: a transfer pipe which is mounted to be detachably attached to the selected mounting hole of the mounting chamber and has one end and the other end open to allow harmful exhaust gas introduced into the inlet space to pass through the outlet space; an opening/closing plate mounted to be closely or spaced apart from the open end or the other end of the transport pipe to selectively open and close the transport pipe; and a restoration spring that is mounted so that one end of the opening and closing plate is in contact with the opening and closing plate and that the opening and closing plate is spaced apart by compression operation at a pressure higher than a set pressure, and a restoring force is applied in the close contact direction when the opening and closing plate is spaced apart.

As an example, in the purification filter module, one surface and the other surface facing the inlet space and the outlet space are opened, respectively, and a plurality of filter meshes are installed along a predetermined interval in the vertical direction therein, so that each transfer flow path between the filter meshes is provided. is formed, and a shielding plate is installed at one end and the other end alternately in each transfer path to be sealed.

As an example, the mounting chamber is formed by a first partition wall in the inflow space direction and a second partition wall in which a plurality of flow holes are formed in the discharge space direction, and the mounting hole is located opposite the first mounting hole of the first partition wall. is composed of a second mounting hole of a second bulkhead, and the bypass valve includes a purification chamber in which a filter of the same size as that of the purification filter module is built in, and a protruding rim protruding from the purification chamber and forming a pressing rim on the outer periphery. body to do; It is characterized in that it comprises a; it is configured in the second bulkhead, the hollow is formed, the body slides, and the elastic recovery tool is included in the pressing frame and the spring therebetween.

As an example, the first mounting hole and the second mounting hole are characterized in that a plurality of guide bars are further configured to form a guide pipe or a plurality of flow paths in which a plurality of second flow holes are formed.

As described above, the device of the present invention provides a noise reduction unit inside the DPF body to avoid being limited in installation space, and by absorbing and reducing noise in the low and high frequency bands in conjunction with the purification filter module at the rear end in a complex way. There is an advantage that the noise reduction effect can be doubled.

In addition, when the exhaust gas is expanded by heat or the engine's sudden output change, the noise reduction unit functions as a chamber to reduce the engine's output drop and the pressure of the purification filter module, thereby minimizing the load generation of the device and prolonging the lifespan. It has the advantage of being extended.

1 is a side cross-sectional view showing an apparatus of the present invention;
Figure 2 is a side cross-sectional view showing the configuration of the baffle chamber according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line AA′ of FIG. 2 .
Figure 4a is a side cross-sectional view showing a bypass valve according to an embodiment of the present invention.
Figure 4b is a side cross-sectional view showing a bypass valve according to another embodiment of the present invention.
5 is a side cross-sectional view showing a purification filter module according to an embodiment of the present invention.
6 is a side cross-sectional view showing another embodiment of the present invention.
7A and 7B are views illustrating different examples of the example shown in FIG. 6, respectively;
8A and 8B are operational state diagrams of the embodiment shown in FIG. 6;

In describing the present invention, the terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her invention. It should be interpreted as meaning and concept consistent with the technical idea of

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

Referring to FIG. 1, the apparatus of the present invention includes a DPF body part 10 through which exhaust gas discharged from an industrial diesel engine is introduced and purifying and discharging the introduced exhaust gas, and in the purification space of the DPF body part 10. The purification processing unit 20 to reduce particulate matter contained in harmful exhaust gases and noise to reduce noise generated in the process of reducing soot provided at the front end of the purification processing unit 20 in the purification space of the DPF body 10 It is configured to include a reduction unit (30).

The DPF body 10 has a purification space inside so that the exhaust gas can be moved and purified, and an inlet pipe 110 and an exhaust pipe 120 communicating with the purification space are provided at one end and the other end, respectively, so that the exhaust gas can be moved and purified from the outside. The delivered harmful exhaust gas flows in, and the exhaust gas that has passed through the purification processing unit 20 is discharged to the outside.

The DPF body 10 may have a cylindrical structure as shown in FIG. 1 . Preferably, the DPF body 10 has a structure in which the diameter gradually decreases toward the inlet pipe 110 and the outlet pipe 120, so that the exhaust gas does not stagnate at the corner of the purification space and a smooth flow is induced. make it possible

And an exhaust pipe (not shown) extending from an industrial diesel engine (not shown) is directly connected to the inlet pipe 110 of the DPF body part 10, so that the exhaust gas of the diesel engine discharged through the exhaust pipe is the DPF body part ( 10) to directly flow into the purification space.

The purification processing unit 20 is mounted in the purification space of the DPF body part 10, and in the process in which the harmful exhaust gas introduced through the inlet pipe 110 is discharged to the exhaust pipe 120, the particulate form contained in the harmful exhaust gas reduce material.

1 shows the structure of a purification processing unit 20 according to an embodiment of the present invention, the purification processing unit 20 of this embodiment is the noise reduction unit 30 in the purification space of the DPF body part 10 . The mounting chamber 200 and the mounting chamber are installed at the rear end in the vertical direction so that the purification space is divided into an inlet space 101 and an outlet space 102, and a plurality of mounting holes 201 are formed to be spaced apart in the horizontal direction. It may include a purification filter module 210 that is installed to be detachably inserted into the selected mounting hole 201 of the 200 and collects and discharges particulate matter included in the harmful exhaust gas.

For example, the purification filter module 210 of the purification processing unit 20 is a unit module, and is provided with a flange at one end and is inserted and fastened to the mounting chamber 200 through bolt coupling, etc. in the state inserted into the mounting hole 2011. can be

The purification filter module 210 is included in the exhaust gas by allowing the exhaust gas to pass through and in contact with the exhaust gas during the process in which the harmful exhaust gas of the inlet space 101 passes through the mounting chamber 200 and moves to the exhaust space 102 . It is to remove and reduce harmful substances by collecting particulate matter.

Meanwhile, although not shown in the drawings, the purification filter module 210 of the purification processing unit 20 may be regenerated through a regeneration heater provided on the inflow side of the mounting chamber 200 , that is, in the inflow space 101 .

The regeneration heater emits heat up to a specific temperature (typically around 600° C.) required for regeneration of the purification filter module 210, and heats the outside air or exhaust gas passing through the regeneration heater to the purification filter module 210. The purification filter module 210 can be regenerated by burning and removing the particulate matter collected and accumulated in the .

Here, the operation of the regeneration heater may be selectively performed by detecting the pressure in the purification space of the DPF body 10 .

As described above, the exhaust gas introduced into the inlet space 101 of the DPF body 10 passes through the purification filter module 210 to collect and remove particulate matter such as incompletely burned hydrocarbons. When the particulate matter is accumulated in the purification filter module 210 in the purifying filter module 210, the pressure in the inner space is also increased in proportion to the accumulated amount.

Eventually, when it is detected that the pressure in the purification space of the DPF body 10 reaches a preset upper limit value, it is determined that regeneration of the purification filter module 210 is required, and emergency power or commercial power is supplied to the regeneration heater. The regeneration process of the purification filter module 210 is to be performed.

Here, the number and arrangement of the purification filter module 210 may be determined in consideration of the processing capacity of the device, and the collection method and type of the purification filter module 210 may be used in various ways that can collect known particulate matter. Since it is possible to select a suitable one of the filters, a detailed description thereof will be omitted.

As described above, the noise reduction unit 30 is installed at a distance from the front end of the purification processing unit 20 in the purification space of the DPF body part 10, and in the process of passing the introduced harmful exhaust gas, a vibration or resonance sound, etc. Absorbs and reduces the noise of

Specifically, the noise reduction unit 30 includes a baffle chamber 300 installed in the purification space of the DPF body 10, as shown in FIGS. 2 and 3, and the baffle chamber 300 inserted and installed. It includes one or more perforated pipes 310 and a plurality of baffle holes 320 that are respectively penetrating through one surface and the other surface of the baffle chamber 300 .

First, the baffle chamber 300 has an internal space 301 and is installed in the vertical direction while forming a separation at the front end of the mounting chamber 200 in the purification space of the DPF body part 10 .

The perforated pipe 310 is horizontally inserted into the center of the baffle chamber 300, and a plurality of through-holes 311 communicating with the inner space 301 of the baffle chamber 300 are formed on the outer periphery. do.

In addition, the perforated pipe 310 is opened with one side facing the inlet pipe 110 exposed to the purification space of the DPF body 10 , and the other side facing the purification processing unit 20 is sealed.

The baffle hole 320 is formed through both sides of the baffle chamber 300 to surround the periphery of the perforated pipe 310 , respectively, and communicates with the inner space 301 .

That is, in the noise reduction unit 30, noise such as vibration sound and resonance sound due to pulsation of exhaust gas discharged from an industrial or generator diesel engine is introduced into the previously opened perforated pipe 310, and again the perforated pipe ( After being discharged to the inner space 301 through the through hole 311 of the 310), it is possible to absorb and alleviate noise in the process of being discharged through the baffle hole 320 formed on the other surface of the baffle chamber 300. will be.

In addition, the noise reduction unit 30 functions as a chamber when the exhaust gas expands by heat in the purification space of the DPF body 10 or when the engine's output changes rapidly, as an independent space is formed therein as mentioned above. By controlling the output reduction of the engine and the pressure of the purification filter module 210, the load generation of the device is minimized.

Meanwhile, according to an embodiment of the present invention, the purification filter module 210 is configured to have a noise reduction structure, so that noise can be more effectively reduced in connection with the noise reduction unit 30 described above.

Referring to FIG. 5 , the purification filter module 210 of this embodiment has one surface and the other surface facing the inlet space 101 and the discharge space 102 respectively opened, and a plurality of filter meshes 211 as partition walls therein. is installed along a predetermined interval in the vertical direction so that the transfer passage 212 is formed between the filter meshes 211 .

In addition, the filter mesh ( 211) to collect particulate matter and to reduce noise by receiving pressure while passing through the micropores.

As such, through the noise reduction structure of the purification filter module 210 according to this embodiment, the noise reduction unit 30 at the front end of the purification filter module 210 primarily reduces the noise in the low frequency band with strong turbidity, The purification filter module 210 at the rear stage reduces the noise in the high frequency band having the secondary noise, so that the noise reduction effect can be doubled.

On the other hand, the device of the present invention is mounted on the selected mounting hole 201 of the mounting chamber 200, and is opened when the pressure of the inlet space 101 is greater than or equal to a preset pressure to discharge the exhaust gas of the inlet space 101. It is characterized by further comprising a bypass valve 40 for bypassing the discharge space (102).

That is, the bypass valve 40 is maintained in a closed state when the pressure on the inlet space 101 of the DPF body part 10 is below a preset pressure, and is opened when the preset target pressure is higher than the inlet space 101 . By bypassing the exhaust gas of the exhaust gas to the exhaust space 102 to be discharged, it is possible to not only prevent deterioration of fuel efficiency and output of the diesel engine, but also prevent problems such as engine hunting and engine shutdown that may occur when high pressure is generated. let it be

This bypass valve 40 is installed in the mounting chamber 200 provided for the mounting of the purification filter module 210 as shown in FIG. It is preferable to be installed in the mounting hole 201 located at the edge of the upper end or lower end.

The bypass valve 40 is also preferably installed in a unit module structure like the purification filter module 210 so as to be detachably installed in the mounting hole 201 of the mounting chamber 200 to improve the convenience of maintenance. .

The bypass valve 40 is inserted and installed in the selected mounting hole 201 of the mounting chamber 200 , and one end and the other end are opened so that the exhaust gas flowing into the inlet space 101 passes through the outlet space 102 . The transfer pipe 400 to make the transfer pipe 400, and the opening and closing plate 410 and the opening and closing plate 410 that are mounted to be closely or spaced apart from the open one end or the other end of the transfer pipe 400 to selectively open and close the transfer pipe 400 ) may be configured to include a restoration spring 420 that is mounted in contact with one end of the opening/closing plate 410 to apply a restoring force in the close contact direction when the opening and closing plate 410 is spaced apart.

And the bypass valve 40 is coupled along the inner periphery of the open one end or the other end of the transfer pipe 400 and an annular mounting rail 430 in which a groove is formed along a portion facing the opening/closing plate 410 . ) and is accommodated in the groove of the mounting rail 430 and is configured to further include an airtight packing 440 in which the opening and closing plate 410 is in close contact with one surface.

At this time, in the case of the airtight packing 440, it is preferable to be composed of a graphite material having excellent heat resistance due to the characteristics of a high temperature environment, and in particular, as shown in FIG. 4A , in the groove portion of the mounting rail 430, at least one fixing jaw 431 ) is provided and a fixing groove 441 in which the fixing jaw 431 is accommodated is provided on the outer surface of the hermetic packing 440 to be mutually fitted, so that the hermetic packing 440 is separated from the mounting rail 430. To prevent exhaust gas leaks that may occur as a result.

As an example, the bypass valve 40 has a shaft 450 coupled in a horizontal direction to the center of one surface of the opening/closing plate 410 as shown in FIG. 4A , and the inner periphery of the transfer pipe 400 . A support 460 for guiding and supporting the horizontal movement of the shaft 450 may be installed there.

In addition, a locking ring 461 through which the shaft 450 passes and supports the free movement of the shaft 450 while the other end of the restoration spring 420 can be caught may be provided in the center of the supporter 460 . .

In the present embodiment, in the case of the restoration spring 420, the tension and compression operations of the restoration spring 420 may be guided by being seated through the shaft 450 of the opening/closing plate 410, as described above. A locking ring 461 is provided at the center of the support 460 so that the other end of the restoration spring 420 may be fixed.

In addition, the bolt member is coupled to one end of the shaft 450 to extend, and a nut 470 rotatably coupled to the bolt member with one end of the restoration spring 420 mounted on the shaft 450 is fixed to the opening and closing. When the plate 410 is spaced apart, the restoring force of the restoring spring 420 can act.

Here, the bypass valve 40 of this embodiment is coupled to adjust the position of one end of the restoration spring 420, and a variable means for adjusting the restoration force by pressing or decompressing the restoration spring 420 by adjusting the position is further added. As may be included, the nut 470 fastened to the bolt member may be utilized as a variable means.

That is, by tightening the nut 470 for fixing the position of one end of the restoration spring 420 as shown in FIG. 4A or adjusting the spacing of the puller restoration spring 420, the pressing or decompression for the restoration force can be made. Accordingly, it is possible to adjust the appropriate opening/closing value of the opening/closing plate 410 by the restoration spring 420 in association with the change in the internal pressure of the DPF body 10 .

Meanwhile, according to another embodiment of the present invention, in the bypass valve 40 , as shown in FIG. 4B , the opening/closing plate 410 has a relatively larger diameter than the transfer tube 400 , and the transfer tube 400 . ) may be installed to be in close contact with the airtight packing 440 installed at the other open end.

And one end of each shaft 450 is fixedly installed on a fixture 490 protruding along the outer periphery of the other end of the transfer pipe 400 , and the other end of the shaft 450 passes through the opening and closing plate 410 and A bolt member having a thread at its end is coupled and extended, and the nut 470 is fastened in a state in which the restoration spring 420 is seated. Of course, it may be configured such that the restoring force can be adjusted by decompressing or pressing the restoring spring 420 through the rotation of the nut 470 .

As described above, the bypass valve 40 of the present embodiment allows a uniform restoring force to be applied along the edge of the opening and closing plate 410, so that a more stable opening and closing operation can be performed. This is a disadvantage of the single restoration spring 420 structure, that is, when the closed state of the opening and closing plate 410 is required, the opening and closing plate 410 cannot be completely in close contact with the airtight packing 440 due to the eccentric operation of the single restoration spring 420. Since the situation can occur, it is possible to solve the disadvantage that the exhaust gas may leak through the non-sealing portion of the opening/closing plate 410 .

On the other hand, in the case of the above-mentioned bypass valve 40, when the internal pressure is less than the critical value, it is possible to form a non-uniform flow of exhaust gas in the bypass valve 40 part. In the present invention, as shown in FIG. In the same way, an example of allowing a uniform flow of exhaust gas to be achieved and bypassing it when the internal pressure rises is presented.

In this embodiment, first, the mounting chamber 200 has a first partition wall 202 in the inflow space 101 direction and a second partition 203 in which a plurality of flow holes 203-1 are formed in the discharge space 102 direction. The mounting hole 201 is formed by the first mounting hole 201-1 of the first bulkhead 202 and the second mounting hole 201-2 of the second bulkhead 203 at a position opposite to it. to be composed of

In this way, a space is formed by the mounting chamber 200, which is a purification chamber 411 of the bypass valve 40 of this embodiment in the flow g1 of the exhaust gas for general purification as described below. When the internal gas exceeds a certain pressure while passing through the exhaust gas g2 is introduced into the space of the mounting chamber 200, the discharge space 102 through the plurality of flow holes 203-1 of the second partition wall 203 ) to be bypassed.

In addition, in this embodiment, the bypass valve 40 protrudes from the purification chamber 411 and the purification chamber 411 in which the filter of the same size as the purification filter module 210 is embedded, and is located on the outer periphery, as shown in FIG. 6 . a body 41 including a protruding rim 412 on which a pressing rim 412-1 is formed; The second partition wall 203 is configured with a hollow 421 is formed so that the body 41 slides therein and the elastic restoration tool 42 includes a spring 422 between the pressure frame 412-1 and the inside. );

The body 41 is composed of the purification chamber 411 with a built-in filter and a protruding edge 412 protruding from one end of the purification chamber 411, and the purification chamber 411 has a filter therein. It is built-in and is formed to have the same size as the purification filter module 210, that is, the same diameter and length.

As described above, since the purification chamber 411 is configured to have the same size as the purification filter module 210 , when the internal pressure is less than the critical value, the flow of exhaust gas is uniformly performed in each purification filter module 210 and each bypass valve 40 . to make it happen Of course, in this process, foreign substances contained in the exhaust gas are uniformly purified by the purification filter module 210 and the purification chamber 411 . That is, the efficiency is doubled by allowing a uniform flow without the formation of dead zones in the flow of exhaust gas.

The protruding rim 412 protrudes from the purification chamber 411 to the same diameter as the purifying chamber 411 and forms a pressing rim 412-1 on the outer periphery. The pressing rim 412-1 is the In conjunction with the spring 422, when the internal pressure is less than the threshold, the function of holding the position of the purification chamber 411 is expressed while in contact with the second partition wall 203, and when the internal pressure exceeds the threshold, by pressure The slide body 41 is to be restored to its original position.

The exhaust gas that is opened at one end of the protruding edge 412 and has passed through the purification chamber 411 is discharged to the exhaust space 102 without any control, thereby passing through the purification filter module 210 and the purification chamber 411. Ensure that the exhaust gas has a uniform flow.

The elastic restoration part 42 is configured to be fastened to the second partition wall 203 by bolting, etc., and a hollow 421 is formed so that the body 41 slides. In addition, a spring 422 is placed between the upper inner surface of the elastic restoration part 42 and the pressing rim 412-1, and as shown in FIG. 8A , when the internal pressure is less than the critical pressure, the body 41 is purified. The chamber 411 is positioned in the mounting hole 201 so that the same function as that of other purification filter modules 210 is expressed, and when the internal pressure exceeds the critical pressure as shown in FIG. As the flow path is formed between the body 41 and the first mounting hole 201-1 of the first bulkhead 202, the exhaust gas g2 flows into the space of the mounting chamber 200 and flows into the second bulkhead 203 ) is to be bypassed to the discharge space 102 through the plurality of flow holes 203-1. When the bypass is made in this way, the internal pressure is lowered, and thus the body 41 is returned to its original position by the elastic restoring force.

In addition to this, in this embodiment, as shown in FIGS. 7A and 7B , a plurality of second flow holes 204-1 are formed in the first mounting holes 201-1 and the second mounting holes 201-2. An example in which a plurality of guide bars 205 are further configured to form a tube 204 or a plurality of flow paths 205-1 is provided, and the guide tube 204 and the guide bar 205 are configured as described above. The slide and restoration of the body 41 is to be guided, and the second flow hole 204-1 and the flow path 205-1 are formed respectively to bypass the exhaust gas (g2) into the mounting chamber 200 during bypass. to make the flow of

Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

10: DPF body part 20: purification processing part
30: noise reduction unit 40: bypass valve
110: inlet pipe 120: outlet pipe
200: mounting chamber 201: mounting hole
210: purification filter module 211: filter mesh
212: transfer path 213: shield plate
300: baffle chamber 301: internal space
310: perforated pipe 311: through hole
320: baffle ball 400: transfer pipe
410: opening and closing plate 420: restoration spring

Claims (8)

a DPF body having a purification space provided therein and having an inlet pipe and an outlet pipe communicating with the purification space at one end and the other end, respectively;
a purification processing unit mounted in the purification space of the DPF body to reduce particulate matter contained in the harmful exhaust gas while the harmful exhaust gas introduced through the inlet pipe is discharged to the exhaust pipe; and
In the purification space of the DPF body, a noise reduction unit that is installed at a distance from the front end of the purification processing unit and absorbs and reduces vibration and noise during the passage of the introduced harmful exhaust gas; including;
The noise reduction unit,
a baffle chamber having an internal space and installed in a vertical direction in the purification space of the DPF body;
A plurality of through-holes are inserted in the center of the baffle chamber in the horizontal direction and communicated with the inner space are formed on the outer periphery, one surface facing the inlet pipe is opened in a state exposed to the purification space, and facing the purification processing unit One or more perforated pipes to which the other surface is sealed; and
and a plurality of baffle holes which are formed through both sides of the baffle chamber to surround the periphery of the perforated pipe, respectively, and communicate with the inner space.
delete The method of claim 1,
The purification processing unit,
a mounting chamber installed in a vertical direction at the rear end of the noise reduction unit in the purification space of the DPF body to divide the purification space into an inflow space and an exhaust space, and in which a plurality of mounting holes are formed to be spaced apart in the horizontal direction; and
and a purification filter module that is inserted and installed so as to be detachably attached to the selected mounting hole of the mounting chamber and collects and discharges particulate matter contained in harmful exhaust gas.
4. The method of claim 3,
and a bypass valve mounted on the selected mounting hole of the mounting chamber and opened when the pressure in the inlet space is greater than or equal to a preset pressure to bypass the exhaust gas in the inlet space to the outlet space. Composite smoke reduction device.
5. The method of claim 4,
The bypass valve is
a transfer pipe mounted so as to be detachably attached to the selected mounting hole of the mounting chamber and having one end and the other end open to allow harmful exhaust gas introduced into the inlet space to pass through the outlet space;
an opening/closing plate mounted to be closely or spaced apart from the open end or the other end of the transport pipe to selectively open and close the transport pipe; and
Silencer composite type soot, characterized in that it includes a restoration spring that is mounted so that one end of the opening and closing plate is in contact with the opening and closing plate and that the opening and closing plate is spaced apart by compression operation above a set pressure reduction device.
4. The method of claim 3,
The purification filter module,
One surface and the other surface facing the inlet space and the outlet space are respectively opened, and a plurality of filter meshes are installed along a predetermined interval in the vertical direction therein to form a transfer passage for each filter mesh, and each transfer passage has one end alternately. A silencer complex type soot reduction device, characterized in that the shielding plate is installed and sealed at the other end.
5. The method of claim 4,
The mounting chamber is formed by a first partition wall in the inflow space direction and a second partition wall in which a plurality of flow holes are formed in the discharge space direction, and the mounting hole is formed by the first mounting hole of the first partition wall and the second partition wall at a position opposite to the first partition wall. Consists of a second mounting hole,
The bypass valve is
a body including a purification chamber in which a filter of the same size as that of the purification filter module is embedded, and a protruding rim protruding from the purification chamber and having a pressing rim formed on an outer periphery; and an elastic restoration device configured in the second bulkhead and formed in a hollow so that the body slides and a spring is included therein with the pressing rim.
8. The method of claim 7,
and a plurality of guide bars are further configured in the first mounting hole and the second mounting hole to form a guide pipe having a plurality of second flow holes or a plurality of flow paths.

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