JPH1071317A - Back-washing and regenerating type exhaust gas cleaner apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously and efficiently carry out back-washing during operation of an exhaust gas cleaner apparatus by sending almost all of air used for back-washing to a route while preventing backward flow to an exhaust gas flowing in route at the time when air for back-washing is jetted out. SOLUTION: During a normal operation time, valves A2, B2, are opened and a valve C2 is closed to lead an exhaust gas to both routes and particulate are captured by filters A1, B1. During the time of back washing of the filter A1, while the valve B2 being opened to operate the filter B1, the valves A2 is closed and the valve C2 is opened and air for back-washing is jetted at a moment out of a nozzle A3 to remove particulate in the filter A1 and lead and capture the particulate to and in the filter C1. In this way, at the time when air for back-washing is jetted out of the nozzle A3, B3, almost all of the used air is sent to the filter C1 side while being prevented from flowing backward to the exhaust gas flow in route. Consequently, after back-washing, dust are immediately captured by the filter C1, so that leakage of polluted air can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying apparatus for removing particulates (particulate matter) in exhaust gas discharged from an internal combustion engine. More particularly, the present invention relates to continuous regeneration of a filter for removing particulates. The present invention relates to a backwash regenerative exhaust gas purifying apparatus that can be carried out efficiently.

[0002]

2. Description of the Related Art Recently, it has become a problem that particulates contained in exhaust gas discharged from internal combustion engines such as vehicles such as buses and trucks and construction machines cause harm to the environment and human bodies. The exhaust gas purification device is provided in an exhaust passage of an internal combustion engine, and captures and removes particulates in exhaust gas by a filter.

It is necessary to provide a device for regenerating a filter by removing trapped particulates in an exhaust gas purification device. As a regeneration method using such an apparatus, there has been conventionally known a method in which heat is directly supplied to a filter and the particulate is incinerated by the heat.
However, this method has a problem that the filter is melted by the heat of combustion of the particulates or the filter is damaged by thermal stress.

As a method for regenerating particulates in a filter without burning them, a high-speed airflow is supplied from a direction opposite to the flow of exhaust gas, and the particulates trapped by the filter are removed by the airflow. There is known a backwashing regeneration system in which particulates are incinerated in an existing container using an electric heater.

[0005] When this backwashing regeneration system is used, it is not necessary to supply high heat for regeneration directly to the filter. Therefore, there is no damage to the filter due to thermal stress, no ash is deposited in the filter, and the filter is clogged. Is unlikely to occur.

However, when a series of these operations are performed by one filter, the back pressure in the engine exhaust pipe increases in the process of removing particulates, which adversely affects the operability. Therefore, a method of alternately regenerating filters using two sets of filters has been proposed (Journal of the Marine Engineering Society of Japan, Vol. 27, No. 6, (1992-1996)).

In this method, as shown in FIG.
The backwash regenerative exhaust gas purifier includes a filter A (1) and a filter B (4), and the exhaust gas passes through the filter A (1) and the filter B (4) in a normal state. When the regeneration of the filter A is performed, as shown in FIG. 5, the filter A is used to prevent the backwash air from flowing out to the exhaust outlet.
Close the valve (2) between (1) and the exhaust outlet. Next, as shown in FIG. 6, the compressed air is instantaneously injected from the nozzle (3) to remove the particulates accumulated in the filter and to regenerate the filter. After playing the filter,
As shown in FIG. 7, the valve (2) is opened again to perform particulate removal using two ordinary sets of filters.

[0008] In these series of processes, the filter B
Exhaust gas flows through (4) as usual, and particulate removal is performed continuously. The regeneration of the filter B (4) is performed in the same manner as the regeneration of the filter A (1) described above.

The exhaust gas purifying apparatus using the two sets of filters can continuously perform backwashing while removing particulates continuously. Therefore, the exhaust gas purifying apparatus can be used for a long time in a truck traveling a long distance or in a place where ventilation is not possible. It can be used for an internal combustion engine that operates continuously.

However, in this method, the particulates removed from one filter accumulate over time in the other passage, the exhaust inflow passage, the combustion air introduction pipe for burning the particulates, and the like. There were problems such as an increase in pressure loss.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and a backwash regeneration type exhaust gas purifying apparatus which can continuously and efficiently perform backwashing when the exhaust gas purifying apparatus is operated. The purpose is to provide.

[0012]

According to the present invention, there is provided a branch type exhaust inflow passage E, a filter A1, and a valve A2 provided on the exhaust outflow side of the filter A1 for shutting off the passage.
A passage A having a nozzle A3 provided between the filter A1 and the valve A2 for injecting backwash air to the filter A1, and a filter B1,
A valve B2 provided on the exhaust gas outflow side of the filter B1 for shutting off a passage and a nozzle B3 provided between the filter B1 and the valve B2 for injecting backwash air to the filter B1; B, and two exhaust passages, which are provided separately from the exhaust inflow passage E on the exhaust inflow side of the filter A1 and the filter B1 and communicate with the two exhaust passages.
A valve C2 provided on either side of the filter C1 for blocking a passage and a passage provided between the filter C1 and the valve C2 and having a nozzle C3 for supplying combustion air to the filter C1; C, comprising a backwash regenerative exhaust purification device comprising:
3 or when backwash air is injected from the nozzle B3,
A backwash regenerative exhaust gas purifier characterized in that most of the air supplied to the backwash is sent to the passage C without flowing back to the exhaust inflow passage E.

The second aspect of the present invention is a branch type exhaust inflow passage E.
A filter A1, a valve A2 provided on the exhaust gas outflow side of the filter A1 for blocking a passage, and a valve A2 provided between the filter A1 and the valve A2 for injecting backwash air to the filter A1. Nozzle A3
And a filter B1, a valve B2 provided on the exhaust gas outflow side of the filter B1 for shutting off the passage, and a backwash air provided between the filter B1 and the valve B2. And a two-system exhaust passage, which is provided separately from the exhaust inflow passage E on the exhaust inflow side of the filter A1 and the filter B1, and communicates with the two system exhaust passages having a passage B having a nozzle B3 for injecting air. , A filter C1, a valve C2 provided on either side of the filter C1 for blocking a passage, and the filter C1 and the valve C2.
And a passage C having a nozzle C3 for supplying combustion air to the filter C1. Is a backwashing regenerative exhaust gas purifying device characterized by having

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a backwash regenerative exhaust gas purifying apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a normal operation state of a backwash regenerative exhaust gas purifying apparatus according to one embodiment of the present invention, and FIG. FIG. 3 is a diagram showing a normal operation of the backwashing regenerative exhaust gas purifying apparatus according to one embodiment of the present invention and a regenerating state of the filter C1. 12 to 16 are partial schematic views of a backwash regenerative exhaust gas purifying apparatus according to an embodiment of the present invention.

[0015] The backwash regenerating exhaust gas purifying apparatus of the present invention is provided in a passage connected to the exhaust side of the internal combustion engine, and the passage is provided with:
The branch-type exhaust inflow passage E is connected to the passage A and the passage B at the front of the exhaust purification device, respectively, and exhausted to the outside at the rear of the exhaust purification device.

The passage A includes a filter A1, a filter A
No. 1 provided on the exhaust gas outflow side for shutting off a passage and a nozzle A provided between the filter A1 and the valve A2 for injecting backwash air to the filter A1.
The passage B is provided with a filter B1, a valve B2 provided on the exhaust gas outflow side of the filter B1, and a valve B2 for shutting off the passage, and a backwash air provided between the filter B1 and the valve B2. And a nozzle B3 for injecting.

On the other hand, filter A1 and filter B1
A passage C provided separately from the exhaust inflow passage E on the exhaust inflow side and communicating the two exhaust passages is provided with a filter C1, a valve C2 provided on either side of the filter C1, and a filter C2 for shutting off the passage. And a nozzle C3 provided between the valve C2 and the filter C1 for supplying combustion air to the filter C1.

As shown in FIG. 1, during normal operation of the exhaust gas purifier, exhaust gas is passed through the passages A and B with the valves A2 and B2 open and the valve C2 closed. The particulates in the exhaust from the internal combustion engine are captured by the filter A1 and the filter B1.

As shown in FIG. 2, after the particulates have been captured by the filter A1 for a certain period of time, when the filter A1 is backwashed, the valve B2 is operated while the valve B2 is open, the valve A2 is closed, and the valve C2 is closed. Is opened, backwash air is instantaneously ejected from the nozzle A3 to remove the particulates in the filter A1, and to guide and capture the particulates in the filter C1.

As shown in FIG. 3, after the filter A1 is backwashed, the valve A2 is opened and the valve C2 is closed, and combustion air is supplied from the nozzle C3 to be heated by, for example, a heater. By means, the particulates in the filter C1 are burned, and the air after the removal of the particulates is guided forward of the filter A1, mixed with the exhaust gas of the internal combustion engine, and introduced into the filter A1. These series of operations are a first regeneration process.

On the other hand, after the particulates are captured on the filter B1 for a certain period of time, when the filter B1 is backwashed,
When the valve A2 is opened and the filter A1 is operated, the valve B2 is closed and the valve C2 is opened, and the backwash air is instantaneously injected from the nozzle B3 to remove the particulates in the filter B1. Induce and capture particulates in the filter C1.

After the filter B1 is backwashed, the valve B2 is opened and the valve C2 is closed, and combustion air is supplied from the nozzle C3, and the inside of the filter C1 is heated by, for example, a heater. The particulates are burned, and the air from which the particulates have been removed is guided forward of the filter A1, mixed with the exhaust gas of the internal combustion engine, and introduced into the filter A1. These series of operations are a second regeneration process. In the present invention, the operation of the exhaust gas purification device is continuously performed, and the first regeneration process and the second regeneration process are alternately repeated.

The backwashing regeneration type exhaust gas purifying apparatus of the present invention, when the backwash air is injected from the nozzle A3 or the nozzle B3,
Most of the air supplied to the backwash is sent to the passage C without flowing back to the exhaust inflow passage E. Examples of such a backwash regenerative exhaust gas purifying apparatus include the following.

(1) Filter A1 or Filter B1
A gas guide pipe P1 for introducing air supplied for backwashing into the passage C is provided on the end face on the exhaust gas inflow side. (2) The exhaust gas inflow passage E has an inlet into the passage A or the passage B provided near the filter A1 or the filter B1. (3) When the backwash air is injected from the nozzle A3 or the nozzle B3, the exhaust inflow passage E is formed in the main flow of the backwash air.
The passage A or the passage B and the flow passage diameter of the exhaust inflow passage E are defined so that the exhaust gas from the intake passage is sucked. (4) An air guide pipe P2 for introducing exhaust gas into the passage A or the passage B at an inlet of the exhaust inflow passage E to the passage A or the passage B.

For example, as shown in FIG. 12, the air guide pipe P1 in the device (1) has a megaphone shape tapered toward the passage C on the outer peripheral edge of the exhaust inflow side end face of the filter A1 or the filter B1. And the like having a cylinder attached thereto. The device (1) uses the air guide tube P
By means of 1, most of the air subjected to backwashing at the time of backwashing can be sent directly to the passage C, whereby when the air for backwashing is jetted from the nozzle A3 or the nozzle B3, it is subjected to backwashing. Most of the generated air is sent to the passage C without flowing back to the exhaust inflow passage E.

In the device (2), for example, as shown in FIG. 13, the inlet of the exhaust inflow passage E and the side surface of the filter A1 or the filter B1 are brought close to each other, and exhaust gas flows in from the portion a in FIG. As shown in FIG. 14, the exhaust-inflow-side end faces of the filter A1 and the filter B1 are
The one provided so as to be located within the substantial area of the inflow port of the exhaust inflow passage E can be mentioned. In the device (2), since the exhaust inlet is provided close to the filter A1 and the filter B1, the inlet of the exhaust inflow passage E is narrow, so that the nozzle A3 or the nozzle B
When the backwashing air is injected from 3, most of the air provided for backwashing is sent to the passage C without flowing back to the exhaust inflow passage E.

In the apparatus (3), for example, as shown in FIG. 15, the flow path diameter of the passage A or the passage B is larger than the flow path diameter of the exhaust inflow passage E, and is used for back washing at the time of back washing. One in which the volume of the passage A or the passage B is ensured so that the exhaust from the exhaust inflow passage E is sucked into the main flow of the generated air. In the device of (3), since the exhaust air from the exhaust inflow passage E is sucked into the main flow of the air supplied to the backwash at the time of the backwash, the backwash air is injected from the nozzle A3 or the nozzle B3. Most of the air used for washing is sent to the passage C without flowing back to the exhaust inflow passage E.

As shown in FIG. 16, for example, as shown in FIG. 16, the air guide tube P2 in the device (4) is inserted into the passage A or the passage B and bent so as to face the center of the passage C. And the like arranged in the above. In the device (4), since the air guide pipe P2 is disposed in the passage A or the passage B, the nozzle A3 or the nozzle B
When the backwashing air is injected from 3, most of the air provided for backwashing is sent to the passage C without flowing back to the exhaust inflow passage E. These devices may be used alone or in combination in the same backwash regenerative exhaust gas purification device.

The backwashing regeneration type exhaust gas purifying apparatus of the present invention can alternately perform the backwashing of the filter A1 and the filter B1, so that the backwashing can be performed while the operation of the exhaust gas purifying apparatus is continued. The backwashing regenerative exhaust gas purifying apparatus of the present invention captures most of the backwashed particulates by the filter C1, so that no dirty air leaks out of the apparatus, and the opposite side of the backwashed filter. The inside of the apparatus such as the filter, the nozzle C3 for assisting combustion, and the exhaust inflow passage E is not contaminated.

The backwashing regeneration type exhaust gas purifying apparatus of the present invention performs particulate combustion in the filter C1 immediately after backwashing while alternately performing backwashing, so that the pressure loss can be kept constant. In the backwash regenerative exhaust gas purifying apparatus of the present invention, the backwash air enters from the reverse direction at the next backwash, so that the remaining unburned particulates remaining after the combustion of the filter C1 are blown out of the filter C1, and are again filtered. A1 or the filter C1 captured by the filter B1
Does not remain.

Since the backwashing type exhaust gas purifying apparatus of the present invention has one filter for supplementing the particulates backwashed from the filter A1 or the filter B1, the dust collection property of the particulates is good, and the backwashing regeneration is possible. The closed-type exhaust gas purification system can be made a closed system, the device can be easily manufactured, and the device can be downsized.

The backwash regeneration type exhaust gas purifying apparatus of the present invention can control the flow of air only by controlling the opening and closing operation of the valve by the sequencer. Does not adversely affect sex. Since the backwashing regenerative exhaust gas purifying apparatus of the present invention can be operated continuously for a long time, the internal combustion engine can be operated for a long time, for example, a truck that operates for a long distance for a long time; a tunnel, a coal mine, etc. It can be suitably used for an internal combustion engine or the like used inside a vehicle.

In the backwashing regenerative exhaust gas purifying apparatus of the present invention, during backwashing, the backwashed air does not flow back into the exhaust gas inflow passage E, so that particulates are gradually transferred to the exhaust gas inflow passage and the opposite passage. And the pressure loss can be prevented from increasing.

The present invention is used in a backwash regenerative exhaust gas purifying apparatus having two exhaust passages, that is, a passage A and a passage B. However, a normal backwash regenerative exhaust gas purifying apparatus having a single exhaust gas passage is used. Can also be applied.

As the backwash regenerative exhaust gas purifying apparatus having the above-described one-system exhaust passage, for example, an exhaust inflow passage e, a filter a1, and a valve a2 provided on the exhaust outflow side of the filter a1 to shut off the passage are provided. A passage a provided between the filter a1 and the valve a2 and having a nozzle a3 for injecting backwash air to the filter a1; and a filter c1 provided separately from the exhaust inflow passage e on the exhaust inflow side of the filter a1. And a passage c having a nozzle c3 for supplying combustion air to the filter c1.

In the backwash regenerative exhaust gas purifying apparatus having the above-described one-system exhaust passage, when the backwash air is injected from the nozzle a3, most of the air provided for the backwash is discharged into the exhaust inflow passage e.
Without flowing back to the passage c. Such a backwash regenerative exhaust purification system includes:
For example, the following can be mentioned.

(1) A filter provided with an air guide tube p1 for introducing backwashed air into the passage c at the end face on the exhaust gas inflow side of the filter a1. (2) An exhaust inlet e provided with an inlet to the passage a in the vicinity of the filter a1. (3) When the backwash air is injected from the nozzle a3, the diameter of each of the passage a and the exhaust inflow passage e is set such that the main flow of the backwashed air sucks the exhaust from the exhaust inflow passage e. What is prescribed. (4) An air guide pipe p2 for introducing exhaust gas into the passage a at the inlet of the exhaust inflow passage e into the passage a. In the backwash regenerative exhaust gas purifying apparatus having the above-described one-system exhaust passage, the air supplied to the backwash does not flow back to the exhaust inflow passage E at the time of the backwash, so that the particulates are discharged to the exhaust inflow passage and the opposite passage. It is possible to prevent the pressure loss from increasing due to accumulation over time.

Hereinafter, an embodiment of a backwash regenerative exhaust gas purifying apparatus according to the second aspect of the present invention will be described with reference to the drawings.
FIG. 17 is a diagram showing a state of the backwashing regenerative exhaust gas purifying apparatus according to the second embodiment of the present invention at the time of backwashing.

In the second embodiment of the present invention, a partition W1 is provided at a branch of the exhaust inflow passage E. Passage A, passage B and passage C of the second invention
The structure and the reproducing method are the same as those described in detail in the first present invention.

The partition W1 is not particularly limited.
For example, as shown in FIG. 17, a flat plate or the like that divides a passage in front of a branch port of the exhaust inflow passage E into a passage A side and a passage B side can be used. The material of the partition W1 is not particularly limited. For example, the same material as the outer wall of the exhaust inflow passage E can be used. The partition W1 may be provided from the inlet of the exhaust inflow passage E to the branch port, or may be provided from the middle of the exhaust inflow passage E to the branch port.

As shown in FIG. 17, the backwash regenerative exhaust gas purifying apparatus according to the second embodiment of the present invention, as shown in FIG. As it is blocked, particulates flow into the opposite passage,
This can prevent the particulate removal capability of the filter on the opposite side from being reduced.

The first and second aspects of the present invention can be used in the same backwash regenerative exhaust gas purification apparatus. By using these at the same time, it is possible to more reliably prevent the air supplied to the backwash from flowing into the exhaust inflow passage E and the opposite passage during the backwash.

[0043]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 A backwash regenerative exhaust gas purification system as shown in FIGS. As the internal combustion engine, a 7000 cc engine was used, and operating conditions were repeatedly set at 500 to 1800 rpm. The backwash air was at a pressure of 8 kg / cm ² and the injection time was 0.1 second. The filter A1 and the filter B1 were made of porous silicon carbide, the partition wall thickness was 0.43 mm, the number of holes was 30 per square inch, the length was 150 mm, and the filter capacity was 3.3 liters. Made of silicon, partition wall thickness 0.43mm, number of holes 30 /
Square inch, length 150mm, filter capacity 0.14
One liter was used. The heater for burning the particulates captured by the filter C1 is 24V-3.
The thing of 00W was used. Combustion air pressure 6.5kg
/ Cm ² . In the passage A or the passage B, as shown in FIG. 12, an air guide pipe P1 was provided at an exhaust gas inlet of the filter A1 or the filter B1.

The engine was operated, and the particulate removal operation was continuously performed by the backwashing regeneration type exhaust emission control system of the present invention, and the backwashing of the filter A1 and the filter B1 was performed alternately.

FIG. 11 shows a sequence diagram of the backwashing. At the same time as the valve A2 is closed, the valve C2 is opened. Immediately after that, the nozzle A3 is opened to inject backwash air, and then the heater is heated and the particles captured by the filter C1 until the filter C1 reaches 670 ° C. Burned curate. Fifteen minutes after the valve A2 was opened, the valve C2 was opened at the same time as the valve B2 was closed. Immediately after that, the nozzle B3 was opened to inject backwash air, and then the heater was heated and the filter C1 was opened. The particulate matter trapped in the filter C1 was burned until the temperature reached 670 ° C. This operation was repeated. At the time of backwashing, of the air provided for backwashing, the air flowing into passage C
1. The amount of air flowing into the passage E was measured as Q2.

As a result, Q1: Q2 was 10: 0. Pressure loss due to backwash regeneration type exhaust emission control device during operation was stable at 2800mmH ₂ O or less. After the operation for 1600 minutes, the inside of the pipe on the inlet side of the filter A1 and the filter B1 was visually judged, and almost no particulate matter was deposited.

Embodiment 2 In the passage A or the passage B, as in the embodiment 1, except that the inlet of the exhaust inflow passage E is provided close to the side surface of the filter A1 or the filter B1 as shown in FIG. As a result of manufacturing and operating the backwashing regenerative exhaust gas purification system, Q1: Q2 was 10: 0. The pressure loss due to the backwash regenerative exhaust purification system during operation is 4200m
It was stable below mH ₂ O. After the operation for 1600 minutes, the inside of the pipe on the inlet side of the filter A1 and the filter B1 was visually judged, and almost no particulate matter was deposited.

Embodiment 3 In the passage A or the passage B, as shown in FIG. 14, the exhaust-inflow-side end faces of the filters A1 and B1 are provided so as to be located within a substantial area of the inlet of the exhaust-inflow passage E. Except for the above, a backwash regenerative exhaust gas purification system was manufactured and operated in the same manner as in Example 1, and as a result, Q1: Q2 was
8: 2. Pressure loss due to backwash regeneration type exhaust emission control device during operation was stable at 3360mmH ₂ O or less.
After the operation for 1600 minutes, the filters A1 and B1
When the inside of the pipe on the inlet side was visually judged, accumulation of particulates was hardly recognized.

[0050]

As described above, the backwashing regeneration type exhaust gas purifying apparatus of the present invention can continuously and efficiently perform backwashing when the exhaust gas purifying apparatus is operated.

[Brief description of the drawings]

FIG. 1 is a diagram showing a normal operation state of an embodiment of a backwashing regeneration type exhaust gas purification apparatus of the present invention.

FIG. 2 is a diagram showing a backwashing regeneration type exhaust gas purification apparatus according to an embodiment of the present invention at the time of backwashing.

FIG. 3 is a diagram showing a normal operation and a regeneration state of a filter C1 of one embodiment of a backwash regeneration type exhaust gas purification apparatus of the present invention.

FIG. 4 is a diagram showing a normal operation state of a conventional backwashing regeneration type exhaust gas purification apparatus using two sets of filters.

FIG. 5 is a view showing a state in which a valve on a filter A side of a conventional backwash regenerating type exhaust gas purification apparatus using two sets of filters is closed.

FIG. 6 is a view showing a state of a conventional backwashing regeneration type exhaust gas purification apparatus using two sets of filters when the filter A is backwashed.

FIG. 7 is a diagram showing a conventional backwashing regenerative exhaust gas purifier using two sets of filters in a normal operation restarting state.

FIG. 8 is a schematic diagram of a backwash regenerative exhaust gas purifying apparatus according to the first embodiment.

FIG. 9 is a cross-sectional view of the backwash regenerative exhaust gas purifying apparatus according to the first embodiment.

FIG. 10 is a schematic diagram of a backwash regeneration type exhaust gas purification system according to the first embodiment.

FIG. 11 is a sequence diagram of backwashing of the backwash regenerative exhaust gas purifying apparatus according to the first embodiment.

FIG. 12 is a partial schematic view of an embodiment of the backwashing regeneration type exhaust gas purification apparatus of the present invention.

FIG. 13 is a partial schematic view of an embodiment of a backwash regenerative exhaust gas purifying apparatus according to the present invention.

FIG. 14 is a partial schematic view of one embodiment of a backwashing regeneration type exhaust gas purification apparatus of the present invention.

FIG. 15 is a partial schematic view of one embodiment of a backwashing regeneration type exhaust gas purification apparatus of the present invention.

FIG. 16 is a partial schematic view of one embodiment of a backwashing regeneration type exhaust gas purification apparatus of the present invention.

FIG. 17 is a view showing an operation state at the time of backwashing of the embodiment of the second embodiment of the present invention.

[Description of Signs] A1 Filter A1 A2 Valve A2 A3 Nozzle A3 B1 Filter B1 B2 Valve B2 B3 Nozzle B3 C1 Filter C1 C2 Valve C2 C3 Nozzle C3 1 Filter A2 Valve 3 Nozzle 4 Filter B5 Valve 6 Nozzle 10 Air Tank Air compressor 12 Sequencer 13 Solenoid valve 14 Regulator 15 Filter C1 Secondary air for combustion P1 Air guide P2 Air guide W1 Partition

Claims (6)

[Claims] 1. A branch-type exhaust inflow passage E, a filter A1, a valve A2 provided on an exhaust outflow side of the filter A1 for shutting off a passage, and a valve A2 provided between the filter A1 and the valve A2. A passage A having a nozzle A3 for injecting backwash air into the filter A1, a filter B1, a valve B2 provided on the exhaust outlet side of the filter B1 for shutting off the passage, and the filter B1 and the valve B2; And a passage B having a passage B having a nozzle B3 for injecting backwash air to the filter B1, and an exhaust inflow passage E on the exhaust inflow side of the filter A1 and the filter B1. The filter C1 is provided separately from the two systems, and is provided on either side of the filter C1 or the filter C1. Valve C2 for shutting off the passage
And a passage C provided between the filter C1 and the valve C2 and having a nozzle C3 for supplying combustion air to the filter C1. When the air for backwashing is injected from the nozzle B3, most of the air provided for the backwash is sent to the passage C without flowing back to the exhaust inflow passage E. A backwash regenerative exhaust purification system characterized by the following. 2. A backwash regenerative exhaust system according to claim 1, wherein an air guide pipe P1 for introducing backwashed air into the passage C is provided at an end face of the filter A1 or the filter B1 on the exhaust inflow side. Purification device. 3. The backwash regenerative exhaust gas purifying apparatus according to claim 1, wherein an inlet of the exhaust inflow passage E to the passage A or the passage B is provided near the filter A1 or the filter B1. 4. When the backwash air is injected from the nozzle A3 or the nozzle B3, the exhaust gas from the exhaust inflow passage E is sucked into the main flow of the backwash air.
The backwash regenerative exhaust gas purifying apparatus according to claim 1, wherein the diameter of each of the passage B and the exhaust inflow passage E is defined. 5. The backwash regeneration according to claim 1, wherein an air guide pipe P2 for introducing exhaust gas into the passage A or the passage B is provided at an inlet of the exhaust inflow passage E to the passage A or the passage B. Exhaust gas purification device. 6. A branch-type exhaust inflow passage E, a filter A1, a valve A2 provided on an exhaust outflow side of the filter A1 for shutting off a passage, and a valve A2 provided between the filter A1 and the valve A2. A passage A having a nozzle A3 for injecting backwash air into the filter A1, a filter B1, a valve B2 provided on the exhaust outlet side of the filter B1 for shutting off the passage, and the filter B1 and the valve B2; And a passage B having a passage B having a nozzle B3 for injecting backwash air to the filter B1, and an exhaust inflow passage E on the exhaust inflow side of the filter A1 and the filter B1. The filter C1 is provided separately from the two systems, and is provided on either side of the filter C1 or the filter C1. Valve C2 for shutting off the passage
And a passage C having a nozzle C3 provided between the filter C1 and the valve C2 for supplying combustion air to the filter C1. A backwash regenerative exhaust gas purifier characterized in that a partition (W1) is provided at a branch port of E.