KR20070024064A - Apparatus for regenerating diesel particulate filter - Google Patents

Abstract

An apparatus for regenerating a diesel particulate filter is provided to efficiently regenerate the diesel particulate filter even without using high temperature exhaust gas. An apparatus for regenerating a diesel particulate filter(22), which is arranged on an exhaust pipe(10) so as to filter and remove particulate material from the exhaust gas, comprises an injection unit(30) for removing particulate material from the diesel particulate filter by injecting an ordinary temperature fluid to the diesel particulate filter. The apparatus further includes a removed particulate recovery pipe(40) arranged at the side opposite to the injection unit so as to pass the removed particulate material; and a particulate storing unit(42) arranged at an end of the removed particulate recovery pipe so as to collect the particulate material.

Description

Regeneration device of diesel particle filter {APPARATUS FOR REGENERATING DIESEL PARTICULATE FILTER}

1 is a schematic view showing a regeneration device of a diesel particle filter according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: exhaust pipe 10a: first opening and closing valve

20: filter device 21: case

22: diesel particle filter 30: injection means

32: pressurized fluid supply pipe 32a: third open and close valve

34: rotation drive means 36: pressurized fluid supply means

40: removal particulate recovery pipe 40a: second opening and closing valve

42: recovery particulate storage means

The present invention relates to a regeneration apparatus of a diesel particulate filter (DPF), and more particularly, by spraying a room temperature fluid at a high pressure with respect to the diesel particulate filter to remove and remove particulate matter accumulated on the diesel particulate filter. The present invention relates to a regeneration device of a diesel particle filter to be regenerated.

In general, diesel engines mounted on vehicles such as buses and trucks have low fuel consumption, high power and high load driving, and demand thereof is continuously increasing.

However, as the exhaust gas emitted from diesel vehicles is recognized as a major air pollutant, regulations on the exhaust gas are being tightened.

Air pollution by diesel vehicles is mainly based on nitrogen oxides (NOx) contained in the exhaust gas and particulate matter (PM; Particulate Matter), which are particulates. Among them, diesel particulate filter (DPF; Removal by filtering with Diesel Particulate Filter is considered the main alternative.

The most problematic problem in using the diesel particle filter is that the accumulated amount of adhesion is prevented because the pores of the filter are blocked by the particulate matter that gradually accumulates and adheres to the filter as the filtering progresses. It is a problem regarding what is called a filter regeneration which removes the particulate matter accumulated regularly at the time more than this appropriate amount.

Since the regeneration is mostly made of carbon components, the method of burning and removing the carbon components attached and accumulated by heating the diesel particle filter is mainly used.

In this regard, the exhaust gas emitted from the diesel engine is used to heat the diesel particulate filter. In this case, carbon, which is a main component of particulate matter, is burned at 550 ° C. or higher, whereas exhaust from the diesel engine is exhausted. The temperature of the gas is usually lower than 300 ° C., and the exhaust gas emitted from diesel engines such as city buses and sweepers, which are mainly low-speed (ie, low-load), has a lower temperature, so that particulate matter is efficiently burned. It can't be done.

Therefore, a method of further heating the exhaust gas or the diesel particle filter itself using an external heating source such as a separate combustion burner or an electric heater is also used to realize higher temperature.

However, if the regeneration of the forced heating method is carried out, it is possible to burn and remove the particulate matter accumulated relatively stably, but since a separately provided combustion burner or electric heater is somewhat expensive and additional energy is required for its operation. Along with the problem of raising the cost, in particular, as the heat of combustion generated during the combustion of particulate matter often exceeds 1,000 ° C., the filter itself is overheated and degraded by the heat of combustion.

That is, local temperature rise and non-uniform temperature distribution are generated in the filter, so that the filter is thermally deformed, partially dissolved, or cracks are generated, thereby impairing the durability of the filter and shortening its lifespan.

The present invention was devised to solve the above problems, and can be efficiently regenerated without damaging the diesel particle filter at low cost by simply using a room temperature fluid without using a forced exhaust gas of elevated temperature. It is an object of the present invention to provide a regeneration device for a diesel particle filter.

The diesel particulate filter regeneration apparatus of the present invention for achieving the above object is for regenerating a diesel particulate filter (DPF) for filtering and removing particulate matter which is particulates contained in the exhaust gas discharged provided on the exhaust pipe. The apparatus is characterized in that it comprises a spray means for regenerating by removing the particulate matter accumulated in the diesel particle filter by spraying a room temperature fluid to the diesel particle filter at a high pressure.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic view showing a regeneration device of a diesel particle filter according to the present invention.

In general, the exhaust gas discharged from the engine (not shown) passes through the filter device 20 of the diesel particulate filter 22 provided on the exhaust pipe 10 and then is discharged to the outside, and the filter device (not shown) 20, the exhaust pipe 10 side connected to the left side is an inflow side through which the exhaust gas flows into the filter apparatus 20 side, and the exhaust pipe 10 side connected to the lower right side of the filter apparatus 20 flows out. Side.

As such, while the exhaust gas passes through the filter device 20, the particulate matter contained therein is filtered by the diesel particle filter 22 to be trapped and removed, and when the process progresses for a long time, it is eventually trapped and accumulated. The diesel particulate filter 22 is blocked by the particulate matter. Then, a regeneration process for removing the accumulated particulate matter from the diesel particulate filter 22 is performed.

The filter device 20 includes a cylindrical case 21, and the diesel particulate filter 22 is mounted inside the case 21.

The diesel particulate filter 22 is a porous honeycomb structure that is configured to be stacked in parallel toward the flow direction of the exhaust gas is used.

The above components are conventional conventional components, and according to the present invention, the following configuration is added as a portion for regenerating the diesel particle filter 22 using a room temperature fluid.

First, the first opening / closing valve 10a is provided on the exhaust pipe 10 connected to the left side of the filter device 20 on the inflow side, and the front space side of the diesel particle filter 22 inside the filter device 20 is provided. The removal fine particle recovery pipe 40 is connected to be connected to the connection, and the second fine opening and closing valve 40a is provided on the removal fine particle recovery pipe 40, and at the end of the removal fine particle recovery pipe 40, a bag is collected. Recovery fine particle storage means 42, such as) is to be provided detachably.

In addition, in the space behind the diesel particle filter 22 inside the filter device 20, an injection means 30, such as an injection nozzle, capable of injecting a high temperature fluid at high pressure with respect to the diesel particle filter 22 is provided. The injection means 30 is provided with a pressurized fluid supply pipe 32 for supplying pressurized fluid, and a third open / close valve 32a is provided on the pressurized fluid supply pipe 32, and the pressurized fluid The end of the supply pipe 32 is provided with a pressurized fluid supply means 36 for supplying the fluid at high pressure. When the fluid used is air, the pressurized fluid supply means 36 is an air compressor. Can be used.

Preferably, the injection means 30 is made of a relatively small diameter compared to the diesel particle filter 22, while the injection means 30 is swinging (swing) is rotated uniformly against the entire area of the diesel particle filter 22 It may be configured to inject the fluid, and the reason why the injection means 30 is not the same diameter as the diesel particle filter 22 but a relatively small diameter is that the air for providing the fluid at an appropriate pressing force when the diameter is larger This is because the capacity of the pressurized fluid supply means 36, such as a compressor, should be increased by that much.

In this regard, a rotation driving means 34 such as a separate rotation motor (motor) may be provided to swing the injection means 30.

In this embodiment, the air compressor is used as the pressurized fluid supply means 36 when the fluid used is typically air, but the pressurized fluid supply means when the pressurized fluid is a liquid such as water or a chemical agent ( 36, a combination of a conventional fluid storage tank and a pump may be used.

Therefore, the high-pressure injection of the fluid at room temperature to the diesel particle filter 22 in the direction opposite to the exhaust gas flow direction from the rear side through the injection means 30, the diesel particle filter ( The particulate matter accumulated in 22 is removed and removed, and the dropped particulate matter is moved to the front space portion of the diesel particulate filter 22 and then moved through the removed particulate recovery pipe 40. As a result will be collected in the recovery particulate storage means 42, such as a collection bag.

As a result, since the fluid at room temperature without heating is used as it is, the apparatus of the combustion burner or the electric heater, which is conventionally required for heating the fluid, can be deleted, and the energy cost required for the operation can be reduced. In particular, by using a room temperature fluid, the diesel particle filter 22 can be prevented from being deteriorated by a conventional high temperature fluid, thereby extending its life.

The operation of the regeneration device of the diesel particulate filter according to the present invention as described above will be described below.

Usually, the particulate matter contained therein is captured and removed by the diesel particulate filter 22 of the filter device 20 in the process of exhausting the exhaust gas through the exhaust pipe 10 as the engine (not shown) is driven. .

As the above process proceeds, particulate matter accumulates gradually in the diesel particulate filter 22, and the particulate matter accumulated at the time when the accumulation cumulative amount reaches an appropriate amount or more is removed from the diesel particulate filter 22. A regeneration process is performed.

To this end, first, the first opening / closing valve 10a provided on the exhaust pipe 10 which is the inflow side to the filter device 20 is closed, and then the second on the removal particulate recovery pipe 40 simultaneously. The on-off valve 40a and the third opening / closing valve 32a on the pressurized fluid supply pipe 32 are opened, and the injection means 30 is swing-rotated so that the room temperature fluid is rearward with respect to the diesel particulate filter 22. At high pressure.

That is, the high pressure fluid is supplied from the pressurized fluid supply means 36 to the injection means 30 through the pressurized fluid supply pipe 32 to be injected from the injection means 30, and the rotation driving means 34 is driven. As the injection means 30 is swing rotated to uniformly spray the pressurized fluid with respect to the entire area of the diesel particle filter (22).

Therefore, the particulate matter adhered to the diesel particulate filter 22 is dropped by the fluid injected at high pressure, and the dropped particulate matter is transported by the pressurized fluid and passed through the removal particulate recovery pipe 40 which is eventually opened. The particulate matter collected in the recovered fine particle storage means 42 is emptied from the recovered fine particle storage means 42.

The regeneration process as described above is performed for a very short time, and as soon as the implementation is completed, the driving of the corresponding devices 34 and 36 is stopped, and the on / off valves 10a, 40a and 32a are reversed. In order to allow the normal exhaust flow to be re-formed.

In addition, a control means (not shown) is, of course, provided to automatically turn on / off the corresponding devices 34 and 36 and the on / off valves 10a, 40a, and 32a as described above. It can be implemented through the ECU (Electronic Control Unit) which is basically installed in the.

Finally, the injection means 30 made of a relatively small diameter compared to the diesel particle filter 22 is swing rotated to uniformly inject the pressurized fluid to the entire area of the diesel particle filter 22, but Alternatively, the injection means 30 may be implemented to uniformly spray the pressurized fluid by moving the coordinates in a series of procedures instead of a rotational motion.

In the foregoing description, it should be understood that those skilled in the art can make modifications and changes to the present invention without changing the gist of the present invention as merely illustrative of a preferred embodiment of the present invention.

According to the present invention, by using a non-heated room temperature fluid, it is possible to eliminate the expensive equipment required for heating the fluid and to reduce the energy cost required to improve the economics, deterioration of the diesel particle filter by the high temperature fluid Can be achieved, and the effect of extending its life can be achieved.

Claims (9)

An apparatus for regenerating a diesel particulate filter (DPF) for filtering and removing particulate matter, which is particulates contained in exhaust gas discharged on an exhaust pipe, And spraying means for regenerating by dropping and removing the particulate matter accumulated in the diesel particle filter by injecting a room temperature fluid at a high pressure with respect to the diesel particle filter. The method of claim 1, A fine particulate recovery pipe provided with the diesel particulate filter so as to communicate with the opposite side on which the injection means is located, and allowing the dropped particulate matter to pass therethrough; And a recovery particulate storage means provided at the end of the removed particulate recovery pipe to collect the dropped particulate matter. The method according to claim 1 or 2, And a first opening / closing valve provided on the inlet side of the diesel particle filter on the exhaust pipe to open and close the flow of the exhaust gas. The method of claim 3, wherein A pressurized fluid supply pipe provided to supply pressurized fluid to the injection means; And a pressurized fluid supply means which is provided at an end of the pressurized fluid supply pipe to provide the pressurized fluid at a high pressure. The method of claim 4, wherein The injection means, It is formed in a relatively small diameter compared to the diesel particle filter, And swinging itself so as to uniformly inject the pressurized fluid with respect to the entire area of the diesel particle filter. The method of claim 4, wherein If the fluid is air, The pressurized fluid supply means, A diesel particulate filter regeneration device, characterized in that the air compressor. The method of claim 4, wherein If the fluid is a liquid, The pressurized fluid supply means, A diesel particulate filter regeneration device, characterized in that a combination of a fluid storage tank and a pump is used. The method of claim 4, wherein A second open / close valve provided on the removal particulate recovery pipe and opened and closed; And a third opening / closing valve provided on the pressurized fluid supply pipe to open and close. The method of claim 5, Regeneration device for a diesel particulate filter, characterized in that it further comprises a rotary drive means for swinging the injection means.

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