JPH09158711A - Method and device for exhaust emission control, and vehicle having the exhaust emission control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of cracks when a filter is regenerated, and to improve the regeneration efficiency. SOLUTION: An exhaust emission control device 1 is provided with a heating means 11 to heat filters 9a, 9b with hot air, an air blowing means 13 provided on the upstream side of the filter 9a, 9b, a particulate collecting means 12 to collect the particulates to be carried by the air flow generated by the air blowing means 13, and a switching valve to switch the flow passage of an exhaust pipe. After the combustible contents in the particulates are removed by heating the filters 9a, 9b in the temperature range of 200-500 deg.C by the heating means 11, the residual contents of the particulates are removed by the particulate collecting means 12. Because the heat generation of the filters 9a, 9b is suppressed to reduce the temperature gradient, generation of cracks is prevented, and the regeneration efficiency is also improved.

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 method, an exhaust gas purifying apparatus, and a vehicle with an exhaust gas purifying apparatus capable of regenerating a filter.

[0002]

2. Description of the Related Art Recently, when particulates in exhaust gas from a diesel engine or the like are released into the atmosphere, the environment is deteriorated, which is a problem. Further, since this particulate is a carcinogenic substance, it is regarded as a health problem, and an exhaust gas purification method for removing the particulate has been widely noted. As this exhaust gas purification method, a method is known in which a ceramic filter is provided in a container arranged in the middle of an exhaust pipe to collect particulates, but in this case, the amount of particulates collected is increased. For example, every time the back pressure of a diesel engine or the like increases, it becomes necessary to regularly remove the particulates collected by the filter. A general method for removing the particulates trapped by this filter is to dispose an electric heater near the exhaust gas upstream end surface of the filter and heat the exhaust gas upstream end surface of the filter to the particulate ignition temperature. After ignition, by controlling the flow rate of air, combustion gas, etc. from the gas supply unit, the combustion heat of particulates is flame-propagated to regenerate the filter, enabling the recapture of particulates. .

[0003]

However, the above conventional structure has a problem that a large temperature gradient is generated in the filter when the filter is regenerated, and as a result, cracks are easily generated in the filter due to thermal stress. It was Also, after igniting the particulates collected in the filter, air or combustion gas is supplied to propagate the flame, but it is difficult to control the supply of these air or combustion gas, and as a result, many filters are supplied to the filter. There is a problem in that the regeneration efficiency of the filter is low because it causes unburned particulate matter.

The present invention solves the above-mentioned conventional problems. An exhaust gas purifying method that reduces the temperature gradient generated in the filter during regeneration of the filter to prevent cracks in the filter and enhances the regeneration efficiency of the filter, and An object of the present invention is to provide an exhaust gas purification device and a vehicle equipped with the exhaust gas purification device.

[0005]

To solve this problem, the present invention provides a filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and an upstream side of the filter. An exhaust gas purifying apparatus comprising: an air blowing unit provided; a dust collecting unit that collects particulate matter carried by an air flow generated by the air blowing unit; and a switching valve that switches a flow path of an exhaust pipe, wherein the heating unit filters the exhaust gas. Is heated to a range of 200 ° C to 500 ° C to remove the volatilized or combustible components contained in the particulates adhering to the filter within the temperature, and to remove the residual components of the particulates by the dust collecting means. It was done.

According to the present invention, the temperature gradient generated in the filter at the time of regenerating the filter is reduced to prevent cracks in the filter and the regeneration efficiency of the filter is improved, the exhaust gas purifying apparatus, and the exhaust gas purifying. A vehicle with a device can be provided.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is provided with a filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and an upstream side of the filter. And a dust collecting means for collecting the particulates carried by the air flow caused by the blowing means,
An exhaust gas purifying apparatus comprising a switching valve for switching a flow path of an exhaust pipe, wherein a filter is provided by a heating unit.
By heating within the range of 0 ° C to 500 ° C, the components that volatilize or burn in the particulates adhering to the filter within the temperature are removed, and the residual components of the particulates are removed by the dust collecting means. In addition, the temperature gradient generated in the filter at the time of regeneration of the filter is reduced to prevent cracks and the like of the filter, and the regeneration efficiency of the filter is enhanced.

According to a second aspect of the present invention, a filter connected to the exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and a blowing means provided upstream of the filter. Dust collecting means for collecting particulate matter carried by the air flow generated by the blowing means, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature detecting means The temperature control means for controlling the heating means by the signal of the above, the differential pressure detection means for detecting the pressure difference before and after the filter, and the switching valve opening / closing control means for controlling the opening / closing of the switching valve by the signal of the differential pressure detection means. The temperature gradient generated in the filter during filter regeneration is reduced to prevent filter cracks and the filter regeneration efficiency. It has the effect of increasing.

The invention according to claim 3 of the present invention comprises a filter connected to the exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and a blowing means provided upstream of the filter. Dust collecting means for collecting particulate matter carried by the air flow generated by the blowing means, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature detecting means The temperature control means for controlling the heating means by the signal of, the differential pressure detection means for detecting the pressure difference before and after the filter, and the switching valve opening / closing control means for controlling the opening / closing of the switching valve by the signal of the differential pressure detection means. The exhaust gas purifying device is provided, and since the filter has high regeneration efficiency, it has an effect of reducing the amount of particulates discharged.

The invention according to claim 4 of the present invention comprises a filter connected to the exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and a blowing means provided on the downstream side of the filter. An exhaust gas purifying apparatus comprising: dust collecting means for collecting particulate matter carried by an air flow generated by a blowing means; and a switching valve for switching a flow path of an exhaust pipe, wherein the particulate matter adhered to a filter by the blowing means. Is removed, and the filter is further heated by a heating means within a range of 500 ° C. to 700 ° C. to remove the residual components of the particulates, and the temperature gradient generated in the filter during regeneration of the filter is reduced. This has the effects of preventing cracks and the like in the filter and increasing the regeneration efficiency of the filter.

According to a fifth aspect of the present invention, a filter connected to the exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and a blowing means provided on the downstream side of the filter. Dust collecting means for collecting particulate matter carried by the air flow generated by the blowing means, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature detecting means The temperature control means for controlling the heating means by the signal of the above, the differential pressure detection means for detecting the pressure difference before and after the filter, and the switching valve opening / closing control means for controlling the opening / closing of the switching valve by the signal of the differential pressure detection means. The temperature gradient generated in the filter during filter regeneration is reduced to prevent filter cracks and the filter regeneration efficiency. It has the effect of increasing.

According to a sixth aspect of the present invention, a filter connected to the exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, and a blowing means provided on the downstream side of the filter. Dust collecting means for collecting particulate matter carried by the air flow generated by the blowing means, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature detecting means The temperature control means for controlling the heating means by the signal of, the differential pressure detection means for detecting the pressure difference before and after the filter, and the switching valve opening / closing control means for controlling the opening / closing of the switching valve by the signal of the differential pressure detection means. The exhaust gas purifying device is provided, and since the filter has high regeneration efficiency, it has an effect of reducing the amount of particulates discharged.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
From now on, description will be made with reference to FIG. (Embodiment 1) FIG. 1 is a schematic diagram showing an exhaust gas purifying apparatus according to a first embodiment of the present invention. In FIG.
Reference numeral 1 is an exhaust gas purifying apparatus, and 2 is a diesel engine that generates exhaust gas. Reference numeral 3 denotes an exhaust manifold in which each upstream end portion is connected to each exhaust hole (not shown) of the diesel engine, and 4 is upstream exhaust gas in which an upstream end portion is connected to a downstream end portion of the exhaust manifold 3. Pipes 5a and 5b are branched exhaust pipes branched from the upstream exhaust pipe 4, respectively. 6,
Reference numeral 6'denotes a communication pipe which communicates with the branch exhaust pipes 5a, 5b, respectively, 7, 7a, 7a ', 7b, 7b' a switching valve for switching the flow path of the exhaust gas, and 8a, 8b respectively a branch exhaust pipe 5a, It is a container connected to the downstream side of 5b. Reference numerals 9a and 9b denote filters housed in containers 8a and 8b, respectively, and are cordierite (2MgO.5SiO).
2Al ₂ O ₃ ) is formed by extrusion molding and is formed of a wall flow type ceramic filter having a diameter of 5.66 inches × length of 6 inches. 10a, 1
Reference numeral 0b is a downstream side exhaust pipe connected to the downstream side of the containers 8a and 8b, respectively. Reference numeral 11 is a heating means provided by a combination of an electric heater or the like and a blower or the like provided in the communication pipe 6 ', and heats the filters 9a and 9b by sending hot air. As the electric heater, a heating element made of a Ni-Cr system is processed into a coil shape and covered with an insulator or the like, and is connected to the communication pipe 6'and accommodated therein. However, a burner or the like can be used as the heat source instead of the electric heater. Reference numeral 12 is a dust collecting means connected to the communication pipe 6, and the filter 9 is carried by an air flow.
The particulates in a and 9b are collected. Reference numeral 13 denotes an air blower for generating an air flow. In the present embodiment, the filters 9a, 9 are used to generate an air flow in the suction direction.
It is provided on the upstream side of b. In this embodiment, a blower is used as an example of the blower unit 13. 14a, 1
Reference numeral 4b is a temperature detecting means arranged near the upstream sides of the filters 9a and 9b, respectively, for measuring the temperature of the hot air supplied from the heating means 11. In this embodiment, a temperature sensor is used as an example of the temperature detecting means 14a and 14b. Reference numerals 15a and 15b are differential pressure detecting means for measuring the pressure difference between the front and rear of the filters 9a and 9b, respectively. In the present embodiment, a pressure sensor is used as an example of the differential pressure detecting means. Reference numeral 16 is a temperature control means, which controls the output of the electric heater or the blower of the heating means 11 based on the information from the temperature detection means 14a and 14b. Reference numeral 17 is a switching valve opening / closing control means, which is a differential pressure detecting means 15a, 1
Switching valves 7, 7a, 7 based on information from 5b
It controls the opening and closing of a ', 7b, 7b'.

With respect to the present embodiment configured as described above, the operation will be described below in addition to FIG.
A description will be given with reference to a flowchart showing the movement of the exhaust gas purifying apparatus according to the embodiment during filter regeneration.

Now, it is assumed that the exhaust gas purifying apparatus 1 purifies the exhaust gas discharged from the diesel engine 2 by the filter 9a. The differential pressure detection means 15a constantly sends the information of the pressure difference before and after the filter 9a to the switching valve opening / closing control means 17 to monitor the clogging of the filter 9a. When the pressure difference reaches a preset value, this means that the filter 9a is clogged, so the switching valve opening / closing control means 17 operates and the filter 9a is activated.
The playback process of starts. Next, in response to a signal from the switching valve opening / closing control means 17, the switching valve 7 is switched to close the branch exhaust pipe 5a side to switch the exhaust gas flow path. At the same time, the switching valve 7a 'on the communication pipe 6'side is opened to allow the heating means 11 and the filter 9a to communicate with each other (S
1). As a result, the exhaust gas from the diesel engine 2
After passing through the exhaust manifold 3, the upstream exhaust pipe 4, and the branch exhaust pipe 5b in order to be introduced into the container 8b, the filter 9b collects the particulates in the exhaust gas, and the purified gas from which the particulates have been removed is It is discharged into the atmosphere from the downstream side exhaust pipe 10b. At the same time, the regeneration of the clogged filter 9a is started.

Next, the temperature control means 16 includes a filter 9a.
In response to the signal for starting regeneration, the preset current / voltage is applied to the electric heater and the blower constituting the heating means 11 to generate hot air. After that, the current / voltage to be applied is controlled by the signal from the temperature sensor of the temperature detecting means 14a to adjust the temperature of the hot air, and the hot air is sent to the filter 9a to heat it within a predetermined temperature range to generate the particulates. The combustible component is burned (S2). The end of this process is determined by the time setting by the timer incorporated in the temperature control means 16 and the reduction amount of the differential pressure before and after the filter 9a by the pressure sensor of the differential pressure detecting means 15a. When the heating step is completed, the electric heater and the blower of the heating means 11 are turned off based on the end signal from the temperature control means 16, and the switching valve 7a 'on the communication pipe 6'side is closed (S3).

A switching valve 7a on the communication pipe 6 side
To open the air blower 13 to communicate with the filter 9a (S4). Next, the air blower 13 is turned on to generate an air flow in the direction of suction, and the unburned components of the particulates in the filter 9a are sucked into the dust collector 12 (S5). Similar to the step of S2, the end of this step is determined by the time setting by the timer built in the temperature control means 16 and the decrease amount of the differential pressure before and after the filter 9a by the pressure sensor of the differential pressure detecting means 15a. . When the dust collecting process is completed, the blower unit 13 is turned off based on the end signal from the temperature control unit 16, and the switching valve 7 on the communication pipe 6 side.
a is closed to complete the regeneration process of the filter 9a (S
6).

A filter regeneration test was conducted using the exhaust gas purifying apparatus 1 which operates as described above. Hereinafter, the exhaust gas purification method according to the present embodiment will be described.

After collecting the particulates in the exhaust gas using the exhaust gas purifying apparatus 1, the filter 9a was regenerated to determine the presence or absence of cracks and measure the regeneration efficiency.
The procedure begins by heating the filter 9a that collects particulates in the exhaust gas. The reason for heating is to remove the combustible component that is a part of the unburned fuel and oil among the components that make up the particulates so that the remaining component can be easily peeled off from the filter 9a. . The filter 9a is heated by the hot air blown out from the heating means 11, and the combustible components among the components contained in the particulates adhering to the filter 9a are removed in advance. After that, the air flow passing through the filter 9a is generated by the blower 13 such as a blower. Then, the filter 9a was regenerated by transporting the residual components of the particulates to the air flow from the filter 9a toward the blower 13 and adsorbing them to the dust collecting means 12 to remove them. The presence / absence of cracks was determined by comparing the smoke value with a smoke meter in the next collection process after the regeneration was completed. In addition, the collection condition of particulates is 3500 cc
1,200 rpm, using the diesel engine 2 of
The operation was performed for 60 minutes at a torque of 20 kgm. Heating means 11
The electric heater of (1) wound a sheath type heating element and sent hot air using a ring blower. The blower 13 for sucking the particulates remaining in the filter 9a was a blower using a commutator motor type with a large air volume and a high static pressure. The above results are shown in (Table 1).

[0020]

[Table 1]

As is clear from the results shown in Table 1, no cracks are found in the filter 9a and the regeneration efficiency is at a high level when the regeneration condition is in the range of 200 ° C to 500 ° C. As described above, in the process of removing particulates, the amount of heat generation can be suppressed by limiting the range of combustion to the portion where the combustible component adheres. As a result, the thermal stress generated in the filter 9a can be relaxed.

FIG. 3 is a perspective view showing a vehicle equipped with the exhaust gas purifying apparatus according to the first embodiment of the present invention. FIG.
18 is a vehicle equipped with a diesel engine 2, 1 is an exhaust gas purifying device, 19 is a transmission,
Reference numeral 20 is a wheel, and 21 is a steering device. As described above, the vehicle 18 equipped with the exhaust gas purifying apparatus 1 has a high filter regeneration efficiency, so that the amount of particulate emissions is reduced and the air pollution can be prevented.

(Embodiment 2) In this embodiment, an air blower is provided on the downstream side of the filter, an air flow is blown to the filter in advance to remove particulates, and then the filter is heated with hot air (implementation). It is significantly different from the form 1).

FIG. 4 is a schematic diagram showing an exhaust gas purifying apparatus according to a second embodiment of the present invention. In FIG. 4, 2 is a diesel engine that generates exhaust gas. 3 is an exhaust manifold, 4 is an upstream exhaust pipe, 5a and 5b are branch exhaust pipes,
Reference numerals 6 and 6 ′ are communication pipes. 7, 7a, 7a ', 7b, 7
b'is a switching valve, 8a and 8b are containers, and 9a and 9b.
Is a filter, and 10a and 10b are downstream side exhaust pipes. 11 is a heating means, 12 is a dust collecting means, 14a,
14b is a temperature detecting means, and in the present embodiment, a temperature sensor is used as an example thereof. Reference numerals 15a and 15b are differential pressure detecting means, and in the present embodiment, a pressure sensor is used as an example thereof. Reference numeral 16 is a temperature control means, 1
Reference numeral 7 is a switching valve opening / closing control means. Since these are the same as those in (Embodiment 1), the same reference numerals are given and duplicate description is omitted.

This embodiment is different from (Embodiment 1) in the following points. 1'is an exhaust gas purifying device,
Blower means 13 'connected to the communication pipe 6 "is provided on the downstream side of the filters 9a and 9b. In the present embodiment, a compressor is used as an example of the blower means 13' to increase the air pressure of the air flow, and the filter 9a is used. , 9b to generate a high-pressure air flow in the direction of blowing. 7a ", 7 on the communicating pipe 6" side
Reference numeral b ″ is a switching valve that switches the flow path of the exhaust gas.

With respect to the present embodiment configured as described above, the operation will be described below in addition to the operation of FIG. 4 and the second operation of the present invention of FIG.
A description will be given with reference to a flowchart showing the movement of the exhaust gas purifying apparatus according to the embodiment during filter regeneration.

Now, it is assumed that the exhaust gas purifying apparatus 1'purifies the exhaust gas discharged from the diesel engine 2 by the filter 9a. The differential pressure detecting means 15a includes a filter 9a.
Information on the pressure difference between before and after is constantly sent to the valve opening / closing control means 17 to monitor the clogging of the filter 9a. When the pressure difference reaches a preset value, this means that the filter 9a is clogged, so the switching valve opening / closing control means 17 operates and the filter 9a is activated.
The playback process of starts. Next, in response to a signal from the switching valve opening / closing control means 17, the switching valve 7 is switched to close the branch exhaust pipe 5a side to switch the exhaust gas flow path. At the same time, the switching valve 7a on the communication pipe 6 side is opened to allow the dust collecting means 12 and the filter 9a to communicate with each other. Then, the switching valve 7a ″ on the communication pipe 6 ″ side is opened, and the blower unit 1
3'is made to communicate with the filter 9a. As a result, the exhaust gas from the diesel engine 2 is introduced into the container 8b through the exhaust manifold 3, the upstream exhaust pipe 4, and the branch exhaust pipe 5b in order, and the particulates in the exhaust gas are collected by the filter 9b. Then, the purified gas from which the particulates have been removed is released into the atmosphere from the downstream side exhaust pipe 10b. At the same time, the regeneration of the clogged filter 9a is started (S11).

Next, the blowing means 13 'is turned on to generate a high-pressure air flow in the direction of blowing out, and the particulates in the filter 9a are separated by the wind pressure and sucked into the dust collecting means 12 (S12). . The end of this process is determined by the time setting by the timer incorporated in the temperature control means 16 and the reduction amount of the differential pressure before and after the filter 9a by the pressure sensor of the differential pressure detecting means 15a. When the dust collection process is completed,
Blower 1 based on the end signal from the temperature controller 16
3'is turned off and the switching valve 7 on the side of the communication pipe 6 "
a "is closed (S13). Then, the switching valve 7a on the communication pipe 6 side is closed and the switching valve 7a 'on the communication pipe 6'side is opened to connect the heating means 11 and the filter 9a (S14).

Next, the temperature control means 16 includes a filter 9a.
In response to the signal for starting regeneration, the preset current / voltage is applied to the electric heater and the blower constituting the heating means 11 to generate hot air. After that, the current / voltage to be applied is controlled by the signal from the temperature sensor of the temperature detecting means 14a to adjust the temperature of the hot air, and the hot air is sent to the filter 9a to heat it within a predetermined temperature range to generate the particulates. The combustible component is burned (S15). The end of this process is
The time setting by the timer built in the temperature control means 16 and the filter 9a by the pressure sensor of the differential pressure detection means 15a
It is determined by the reduction amount of the differential pressure before and after. When the heating step is completed, the electric heater and the blower of the heating means 11 are turned off based on the end signal from the temperature control means 16, the switching valve 7a 'on the communication pipe 6'side is closed, and the regeneration process of the filter 9a is completed. Yes (S16).

Exhaust gas purifying apparatus 1'that operates as described above
Was used to carry out a filter regeneration test. Hereinafter, the exhaust gas purification method according to the present embodiment will be described.

After collecting the particulates in the exhaust gas using the exhaust gas purifying apparatus 1 ', the filter 9a was regenerated to determine the presence or absence of cracks and measure the regeneration efficiency. In the procedure, first, a high-pressure air flow is generated by a blower 13 such as a compressor, and the particulates of the filter 9a are separated by wind pressure. Then, the particulates are carried by the air flow from the filter 9a toward the dust collecting means 12 and are adsorbed to the dust collecting means 12 to be removed, whereby the regeneration of the filter 9a is started. Then, the filter 9a was regenerated by heating the filter 9a with the hot air blown from the heating means 11 and burning and removing the particulates remaining on the filter 9a. The presence / absence of cracks was determined by comparing the smoke value with a smoke meter in the next collection process after the regeneration was completed. The particulate collection conditions are as follows: the diesel engine 2 of 3500 cc is used and the rotation speed is 1200 rpm and the torque is 20 kgm.
It was operated for 60 minutes. As the electric heater of the heating means 11, a sheath type heating element was wound, and hot air was sent using a ring blower. A compressor was used as the air blowing means 13 for blowing off the particulates adhering to the inside of the filter 9a, and 5 to 6 kgf / cm ² of air was supplied for 3 minutes at 10 Nl per pulse as a high-pressure air supply condition. The above results are shown in (Table 2).

[0032]

[Table 2]

As is clear from the results of (Table 2), no cracks were found in the filter 9a and the regeneration efficiency was at a high level when the regeneration condition was in the range of 500 ° C to 700 ° C. As described above, in the process of removing particulates, the particulates are removed by air pressure in advance, and the residual component is removed by combustion, so that the heat generation amount can be suppressed as compared with the conventional example. As a result, the thermal stress generated in the filter 9a can be relaxed.

FIG. 6 is a perspective view showing a vehicle equipped with an exhaust gas purifying apparatus according to a second embodiment of the present invention. FIG.
In the figure, 18 'is a vehicle equipped with the diesel engine 2, 1'is an exhaust gas purifying device, 19 is a transmission, 20 is a wheel, and 21 is a steering device. As described above, the vehicle 18 'equipped with the exhaust gas purifying apparatus 1'has a high filter regeneration efficiency, so that the amount of particulates discharged is reduced and the air pollution can be prevented.

[0035]

As described above, according to the present invention, an exhaust gas purifying method which does not cause cracks or the like in the conventional filter regeneration process, has excellent regeneration efficiency, and has excellent durability and reliability, and An exhaust gas purifying apparatus and a vehicle equipped with an exhaust gas purifying apparatus can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an exhaust gas purifying apparatus according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing the movement of the exhaust gas purifying apparatus according to the first embodiment of the present invention during filter regeneration.

FIG. 3 is a perspective view showing a vehicle equipped with the exhaust gas purifying apparatus according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing an exhaust gas purifying apparatus according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing the movement of the exhaust gas purifying apparatus according to the second embodiment of the present invention during filter regeneration.

FIG. 6 is a perspective view showing a vehicle equipped with an exhaust gas purifying apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

1,1 'Exhaust gas purifying device 2 Diesel engine 3 Exhaust manifold 4 Upstream exhaust pipe 5a, 5b Branch exhaust pipe 6, 6', 6 "Communication pipe 7, 7a, 7b, 7a ', 7b', 7a", 7b " Switching valve 8a, 8b Container 9a, 9b Filter 10a, 10b Downstream exhaust pipe 11 Heating means 12 Dust collecting means 13, 13 'Blower means 14a, 14b Temperature detecting means 15a, 15b Differential pressure detecting means 16 Temperature control means 17 Switching valve Opening / closing control means 18, 18 'Vehicle 19 Transmission 20 Wheels 21 Steering device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location B01D 46/42 ZAB 9441-4D B01D 46/42 ZABB 46/44 46/44 (72) Inventor Fujiwara Yasuhiro 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, a blowing means provided on the upstream side of the filter, and an air flow caused by the blowing means. An exhaust gas purifying apparatus comprising: a dust collecting means for collecting particulates and a switching valve for switching a flow path of an exhaust pipe, wherein a heating means heats a filter within a range of 200 ° C to 500 ° C. An exhaust gas purification method, characterized in that the volatilized or combustible components contained in the particulates adhering to the filter are removed by the method, and the residual components of the particulates are removed by dust collecting means. 2. A filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, a blowing means provided on the upstream side of the filter, and an air flow caused by the blowing means. Dust collecting means for collecting particulates, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature control for controlling the heating means by the signal of the temperature detecting means. An exhaust gas purifying apparatus comprising: a means, a differential pressure detecting means for detecting a pressure difference before and after a filter, and a switching valve opening / closing control means for controlling opening / closing of a switching valve by a signal of the differential pressure detecting means. 3. A filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, a blowing means provided on the upstream side of the filter, and an air flow caused by the blowing means. Dust collecting means for collecting particulates, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature control for controlling the heating means by the signal of the temperature detecting means. And a switching valve opening / closing control unit that controls opening / closing of the switching valve according to a signal from the differential pressure detection unit. A vehicle with an exhaust gas purification device. 4. A filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, a blowing means provided on the downstream side of the filter, and an air flow caused by the blowing means. An exhaust gas purifying apparatus comprising a dust collecting means for collecting particulates and a switching valve for switching a flow path of an exhaust pipe, wherein particulates adhering to the filter are removed by a blowing means, and the filter is further heated by a heating means. An exhaust gas purification method, characterized by heating within a range of 500 ° C to 700 ° C to remove residual components of particulates. 5. A filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, a blowing means provided on the downstream side of the filter, and an air flow caused by the blowing means. Dust collecting means for collecting particulates, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature control for controlling the heating means by the signal of the temperature detecting means. An exhaust gas purifying apparatus comprising: a means, a differential pressure detecting means for detecting a pressure difference before and after a filter, and a switching valve opening / closing control means for controlling opening / closing of a switching valve by a signal of the differential pressure detecting means. 6. A filter connected to an exhaust pipe, a container for housing the filter, a heating means for heating the filter with hot air, a blowing means provided on the downstream side of the filter, and an air flow caused by the blowing means. Dust collecting means for collecting particulates, a switching valve for switching the flow path of the exhaust pipe, temperature detecting means for detecting the temperature in the filter or the container, and temperature control for controlling the heating means by the signal of the temperature detecting means. And a switching valve opening / closing control unit that controls opening / closing of the switching valve according to a signal from the differential pressure detection unit. A vehicle with an exhaust gas purification device.