JP2007187136A - Particulate matter removing device, and particulate matter removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To always positively and stably remove soot particulates or the like deposited on a filter by a simple composition irrespective of burning conditions, and to positively and inexpensively regenerate the filter. <P>SOLUTION: By removing the soot particulates in a PM removing part 4, and at the same time, regenerating a clogged filter unit 11 in a filter regenerating part 5, two sets of the filter units 11 can be changed and continuously used for PM removal. Ozone gas to be used as activated gas is supplied to the filter regenerating part 5 from an ozone supply part 6, particulate matter such as the soot particulates is oxidized, burned, and removed, and the filter is regenerated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a particulate matter removing device and a particulate matter removing method, for example, filtering particulate matter (PM) such as black smoke fine particles contained in combustion exhaust gas of an internal combustion engine such as a diesel engine. The present invention relates to a particulate matter removing apparatus and a particulate matter removing method for capturing and burning and removing particulate matter deposited on a filter to regenerate the filter.

  A large amount of carbon particulates (so-called black smoke) exists in the exhaust gas of diesel vehicles, and these carbon particulates flew into the air for a long time after being exhausted through the exhaust passage, and finally , Fall down on the floor, road, clothes, etc. By the way, since carbon adsorbs things well, various chemical substances such as carcinogenic substances are adsorbed by carbon fine particles floating in the air, and humans inhale these carbon fine particles into the human body. In recent years, it has been reported that cancer and respiratory diseases are caused. For this reason, emission control of particulate matter from diesel vehicles has become an important issue.

  Further, in addition to internal combustion engines including diesel engines used in such diesel cars and generators, exhaust in the case of exhausting generated combustion gas via an exhaust system in general combustion devices such as boilers and gas turbines. Gas regulations have been strengthened. Combustion device side improvements such as fuel composition improvement, emulsification, recirculation of exhaust gas to the combustion device, improvement of combustion itself, etc. Research and development of after-treatment devices for harmful components in exhaust gas is underway.

  For example, in order to protect environmental air from diesel black smoke pollution, a black smoke collection device in which a black smoke removal filter made of metal fibers, honeycomb-shaped elements, etc. is installed in the exhaust passage of a diesel engine mounted on a vehicle has been provided. ing. Hereinafter, ceramic honeycomb filters and metal filters will be described as examples.

  As shown in FIGS. 24 and 25, the honeycomb filter 125 has a plurality of cells 127, 127,... Serving as exhaust gas filter paths partitioned by the partition walls 126. The exhaust gas inflow end face 128 of the cells 127 and The exhaust gas outlet side end surface 129 has a honeycomb structure alternately plugged with plugs 131, and exhaust gas flows into the honeycomb filter 125 from the cells 127 that open to the exhaust gas inflow end surface 128, forcing the honeycomb filter 125. By passing through the partition wall 126, the carbon fine particles in the exhaust gas are collected on the partition wall 126 and removed. As a result, the contaminated gas G1 containing black smoke fine particles and the like is discharged as a purified gas G2. Unburned fine particles 132 remain on the partition wall 126. As a material of the honeycomb filter 125, ceramics such as cordierite, silicon carbide, sialon, and silicon nitride are used.

  In addition, as shown in FIGS. 26 and 27, the metal filter 134 is subjected to, for example, press processing, roller press processing, or the like on the band-shaped metal flat plate, so that a large number of triangular shapes having the planar protrusions pa and pb at the edges. Are formed in a longitudinal corrugated metal plate 135 in which a plurality of through holes are formed in a strip-shaped metal flat plate. In the state where the plate 136 is formed and the corrugated metal plate 135 and the flat metal plate 136 obtained in this manner are stacked, the corrugated metal plate 135 and the flat metal plate 136 are directed in the longitudinal direction, and FIG. As shown in Fig. 4, it is created by winding up in a spiral.

  As shown in an enlarged view in FIG. 27, the through-hole Ha formed in the corrugated metal plate 135 has four triangular shapes facing each other that are bent and protruded from the back surface to the front surface at the edge. Has a planar projection pa. The through-hole Hb has four triangular planar protrusions pb that face each other and are bent and protruded from the front surface to the back surface.

However, in such a honeycomb filter or a metal filter, if a large amount of black smoke particulates collected inside accumulates, the black smoke particulates cause clogging and pressure loss increases, and the exhaust system on the diesel engine side increases. When the pressure is applied, the performance of the diesel engine is deteriorated, and in the worst case, the diesel engine is stopped.
For this reason, the black smoke particles accumulated in the filter must be periodically removed to regenerate the filter.

In order to regenerate a honeycomb filter or the like, for example, an exhaust gas processing apparatus that burns and removes black smoke particulates using an electric heater, an afterburner, or the like is used.
However, since the honeycomb filter must be heated to a temperature of 600 ° C. or more, the honeycomb filter is exposed to a sudden temperature change or local heat generation, and thus an uneven temperature distribution is likely to occur inside, resulting in damage. There was a problem of reaching.

For this purpose, NO contained in the gas flowing into the exhaust gas treatment device is first oxidized to NO ₂ having a strong oxidizing power, and the obtained NO ₂ is introduced into the filter, and NO ₂ is used to form the honeycomb filter. There has been proposed an exhaust gas treatment device that oxidizes and removes inflammable particulate matter such as black smoke particles deposited on the surface of the partition wall (see, for example, Patent Document 1).
That is, this technique, in front of the honeycomb filter, an oxidation catalyst is arranged, the NO contained in the exhaust gas discharged from a diesel engine is oxidized to NO _2, it is intended to reproduce the honeycomb filter by using the NO ₂ .

A method using plasma has also been proposed. That is, black smoke particulates and the like are collected using a honeycomb filter, and NO contained in the exhaust gas is strongly oxidized before flowing into the honeycomb filter by a plasma reactor installed inside or outside the exhaust passage. is oxidized to NO _2, with NO _2, at a relatively low temperature black smoke particles or the like deposited on the surface of the partition walls of the honeycomb filter, the exhaust gas processing apparatus has been proposed for removing combustion (e.g., Patent Document 2, (See Patent Document 3).
JP 2001-280121 A JP 2004-68684 A Special table 2003-535255 gazette

The problem to be solved is that, in the conventional metal filter, the regeneration function is influenced by the combustion conditions, and, for example, the device configuration is complicated and the cost is increased.
For example, in the technology in which an oxidation catalyst is arranged in front of the honeycomb filter, when the diesel engine is operated at a low speed and a low load, the oxidation catalyst is not activated and the honeycomb filter is regenerated because the temperature of the exhaust system is low. There was a problem that could not.

In addition, the oxidation efficiency of NO _x is about 50 [%] at most, which is not sufficient for filter regeneration. Furthermore, with this technology, when a large amount of black smoke particulates or the like is deposited on the partition walls of the honeycomb filter, the accumulated black smoke particulates etc. are oxidized and burned at a time when the temperature at which the oxidation catalyst is activated is reached. There was a problem in that the inside rapidly became hot and the internal honeycomb filter was damaged by thermal stress.

Also, in the technology using plasma in the front stage of the honeycomb filter, thermal non-equilibrium plasma is generated by discharge at the plasma generation electrode, and NO in the exhaust gas can be oxidized to NO ₂ at a relatively low temperature of 300 ° C. or lower. Although it contributes to the combustion of the black smoke fine particles, NO ₂ becomes NO after the reaction, and there is a problem that a processing apparatus for NO is required on the downstream side, which complicates the apparatus and increases costs.

In addition, both of the above-described technologies for regenerating a filter by oxidizing NO in exhaust gas to NO ₂ using a catalyst or plasma and burning black smoke particulates or the like with NO ₂ depends on the operating conditions of the diesel engine. There was a problem that the amount of ₂ was insufficient and it was difficult to regenerate the filter. That is, in the exhaust gas, (NO ₂ / C> 8), preferably (NO ₂ / C> 24) NO ₂ is required, but this condition may not be satisfied.
Further, when the diesel engine operation, for simultaneously exhaust gas treatment using the same exhaust pipe, it is necessary to perform the exhaust control of diesel engine concentration ratio etc. of the NO _x and black smoke particles or the like in detail, and its efficiency There has been a problem that it may decrease.

  The present invention has been made in view of the above-described circumstances. For example, the present invention relates to combustion conditions such as the temperature of exhaust gas, the amount of an oxidant such as NOx, and the operating state (load ratio, etc.) of a diesel engine. Particulate matter removal device and particulate matter removal that can reliably remove black smoke particulates accumulated on the filter at all times with a stable and simple configuration, and can reliably regenerate the filter at low cost It aims to provide a method.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a filter unit, which is incorporated on a flow path of exhaust gas, for capturing particulate matter in the exhaust gas, or capturing and removing it by combustion, and plasma The present invention relates to a particulate matter removing apparatus comprising an active gas generating means for generating an active gas that promotes an oxidation reaction from a raw material gas and supplying the active gas to the filter unit on which the particulate matter is deposited, The filter unit in which the particulate matter is deposited is disposed, receives the supply of the active gas from the active gas generation means, and the filter unit is subjected to combustion removal using the active gas of the particulate matter deposited on the filter unit. It is characterized by having a filter regeneration unit for regenerating.

  Further, the invention according to claim 2 relates to the particulate matter removing apparatus according to claim 1, wherein when the exhaust gas or the active gas is flowed and the exhaust gas flows in, the particulate matter in the exhaust gas is captured. Alternatively, the removal function combines the function of the filter unit for capturing and removing by combustion, and the function of the filter regeneration unit for removing the particulate matter by oxidizing and burning with the active gas when the active gas flows in. / Regeneration unit, and a flow path direction switching means for allowing any one of the exhaust gas and the active gas to flow into the removal / regeneration unit.

  A third aspect of the present invention relates to the particulate matter removing apparatus according to the second aspect, comprising a plurality of the removal / regeneration sections and a switching control means for controlling the flow path direction switching means. The control means causes the exhaust gas to flow into some of the removal / regeneration units of the plurality of removal / regeneration units to perform the particulate matter removal process, and causes the other removal / regeneration units to perform the activity. The filter regeneration process is performed by introducing a gas, and each of the removal / regeneration units controls the flow path direction switching means so as to alternately perform the particulate matter removal process and the filter regeneration process. It is a feature.

  According to a fourth aspect of the present invention, there is provided the particulate matter removing apparatus according to the third aspect, wherein the filter is based on a pressure difference between the upstream side and the downstream side of the removal / regeneration unit that performs the particulate matter removal process. Clogging detection means for detecting clogging is provided, and the switching control means controls the flow path direction switching means based on the detection result of the clogging detection means.

  According to a fifth aspect of the present invention, there is provided the particulate matter removing apparatus according to any one of the first to fourth aspects, wherein the particulate matter removing device is discharged from the removal / regeneration unit or the filter regeneration unit that performs the filter regeneration process. At least a part of the gas is returned to the removal / regeneration unit that performs the filter regeneration process or the inlet of the filter regeneration unit.

  A sixth aspect of the present invention relates to the particulate matter removing apparatus according to any one of the first to fifth aspects, and the downstream side of the removal / regeneration unit or the filter unit that performs the particulate matter removal process. Is characterized in that a nitrogen oxide treatment apparatus for treating nitrogen oxides is provided.

  Further, the invention according to claim 7 relates to the particulate matter removing apparatus according to any one of claims 1 to 6, wherein between the filter unit that performs the particulate matter removing process and the filter regeneration unit, Alternatively, heat exchange is performed between the removal / regeneration unit that performs the particulate matter removal process and the removal / regeneration unit that performs the filter regeneration process, and the temperature of the filter unit during the regeneration process is increased to perform regeneration. It is characterized by having a heat exchange means for promoting.

  The invention according to claim 8 relates to the particulate matter removing apparatus according to any one of claims 1 to 7, wherein the catalyst for promoting combustion of the trapped particulate matter is particulate matter removal. It is characterized in that it is disposed on the upstream side or the downstream side of the removal / regeneration unit or the filter unit for performing processing, or is carried by the filter unit.

  The invention described in claim 9 relates to the particulate matter removing apparatus according to any one of claims 1 to 8, and is incorporated in a flow path of exhaust gas discharged from an internal combustion engine, and performs filter regeneration processing. A recirculation unit is provided for recirculating the gas discharged from the removal / regeneration unit or the filter regeneration unit to the internal combustion engine.

  The invention according to claim 10 relates to the particulate matter removing apparatus according to any one of claims 1 to 9, wherein the active gas generating means is based on air or oxygen gas as the introduced source gas. It is characterized by comprising an ozone generator for generating ozone gas as the active gas.

  The invention according to claim 11 relates to the particulate matter removing device according to claim 10, wherein at least one of an oxygen adsorbent, an oxygen separation membrane, a nitrogen adsorbent, and a nitrogen separation membrane is arranged, The ozone generator is provided with a gas supply device for supplying a gas containing oxygen gas.

  The invention described in claim 12 relates to the particulate matter removing apparatus according to claim 10 or 11, wherein the ozone generator is a creeping discharge type or silent discharge type ozone generator.

  A thirteenth aspect of the present invention relates to the particulate matter removing apparatus according to any one of the first to twelfth aspects, wherein the filter section includes a metal filter and / or a ceramic filter. It is said.

  According to a fourteenth aspect of the present invention, there is provided a particulate matter removing step for capturing particulate matter in the exhaust gas, or capturing and removing the particulate matter in the exhaust gas by means of a filter part incorporated in the exhaust gas flow path, and plasma. The present invention relates to a particulate matter removing method including an active gas generation step for generating an active gas that promotes an oxidation reaction from a raw material gas and supplying the active gas to the filter unit on which the particulate matter is deposited. The active gas is supplied from the active gas generating means to the filter portion on which the material is deposited, and the filter portion is regenerated by burning and removing the particulate matter deposited on the filter portion using the active gas. A filter regeneration step is included.

According to the configuration of the present invention, the active gas generating means generates the active gas that promotes the oxidation reaction from the raw material gas by the plasma reaction, and supplies the active gas to the filter portion on which the particulate matter is deposited. particulate matter is removed by oxidation combustion by the active gas, since regenerating the filter, for example, temperature or the exhaust gas, the amount of oxidizing agent such as NO _x, (the ratio of load, etc.) the operation state of the diesel engine, such as Regardless of the combustion conditions, with a stable and simple configuration, particulate matter such as black smoke particulates deposited on the filter part can always be reliably removed, and the filter part can be reliably and inexpensively regenerated. .

In the active gas generation means, an active gas that promotes an oxidation reaction is generated from the raw material gas by a plasma reaction, and is supplied to the filter portion on which the particulate matter is deposited. Therefore, the particulate matter deposited on the filter portion is oxidized by the active gas. It was removed by burning, by playing a filter, for example, stable despite temperature and the exhaust gas, the amount of oxidizing agent such as NO _x, the combustion conditions such as the operating state of the diesel engine (the ratio of load, etc.) In addition, with the simple configuration, the purpose of always removing particulate matter such as black smoke particulates deposited on the filter portion reliably and regenerating the filter portion reliably and at low cost has been realized.

  1 is a diagram showing a configuration of an exhaust gas purifying apparatus according to Embodiment 1 of the present invention, FIG. 2 is a side view showing schematic configurations of a PM removing unit and a filter regeneration unit of the exhaust gas purifying device, and FIG. FIG. 4 is a perspective view showing a schematic configuration of the PM removal unit and the filter regeneration unit, FIG. 4 is a cross-sectional view partially showing the schematic configuration of the PM removal unit and the filter regeneration unit, and FIG. FIG. 6 is a perspective view illustrating a configuration of a removal unit and a filter regeneration unit of the filter regeneration unit, FIG. 6 is a perspective view illustrating a configuration of a metal filter of a filter unit of the PM removal unit and the filter regeneration unit, and FIG. FIG. 8 is a perspective view showing the configuration of the corrugated metal plate of the metal filter, FIG. 9 is a diagram showing the configuration of the ozone supply unit of the exhaust gas purification device, and FIG. , Showing the configuration of the controller of the exhaust gas purification device Fig. 11 is a diagram showing the configuration of an evaluation system for evaluating the function of the exhaust gas purification device. Fig. 12 shows the elapsed time from the start of PM removal by the PM removal unit and the PM removal unit. FIG. 13 is a schematic diagram showing the relationship between the mass of the collected PM, and FIG. 13 shows the ratio of the load of the diesel engine connected to the exhaust gas purification device and the concentration of the gas component discharged from the PM removal unit. FIG. 14 shows a relationship between the elapsed time from the start of filter regeneration by the filter regeneration unit and the concentrations of carbon monoxide and carbon dioxide gas discharged from the filter regeneration unit. FIG. 5 is a schematic diagram showing the relationship between the elapsed time and the temperature of the outer wall of the container of the filter regeneration unit.

As shown in FIG. 1, the exhaust gas purification device 1 of this example is connected to a discharge path 3 of a diesel engine 2 as an internal combustion engine and used to purify exhaust gas discharged from the diesel engine 2. Then, the PM removal unit 4 for capturing and removing diesel particulates (PM), the filter regeneration unit 5 for regenerating the filter on which the diesel particulates are deposited, and ozone as an active gas in the filter regeneration unit 5 The ozone supply part 6 to supply and the controller 7 are provided.
The exhaust gas purifying apparatus 1 is mounted on a moving body driven by a diesel engine such as a diesel vehicle or disposed immediately after a combustion apparatus having a diesel engine such as a stationary diesel generator. The

  As shown in FIGS. 1 to 4, the PM removal unit 4 is connected to the exhaust path 3 and has an outer pipe 9 having openings on the inflow side and the outflow side of diesel exhaust gas, and is fitted to the outer pipe 9. And a plurality of (for example, two) filter units 11 and 11 for capturing or capturing and removing particulates in diesel exhaust gas, and the plurality of filter units 11 and 11 are diesel exhaust gas. Are connected to each other along the flow of, and further combined with the diesel exhaust gas inlet pipe 12 and the outlet pipe 13 to form an inner pipe 14 having a sealed structure except for the inflow side and the outflow side. As a whole, it has a double tube structure.

In this example, as shown in FIG. 2 to FIG. 5, two cylindrical filter units 11, 11, and a joint pipe 15 with a gasket that joins the filter units 11, 11 together in the front and rear stages, The inlet pipe 12 and the outlet pipe 13 are fastened and fixed by an attaching / detaching means 16 having a bolt-nut structure to constitute an inner pipe 11 having an airtight structure.
A front lid portion 17 of the inner tube 11 is welded to the inlet tube 12, and a rear lid portion 18 of the inner tube 11 is welded to the outlet tube 13. Between the filter unit 11 arranged on the upstream side and the front lid part 17 (inlet pipe 12), between the filter unit 11 arranged on the downstream side and the rear lid part 18 (outlet pipe 13), An annular gasket (not shown) is inserted to ensure a sealing structure. In the gasket, both surfaces of an annular metal plate are coated with carbon particles.

Each filter unit 11 is generally configured by an internal cylinder portion 21, a roll-shaped metal filter 22 housed in the internal cylinder portion 21 with a common axis, and a cross-shaped filter receiver 23.
In this example, as shown in FIGS. 6 and 7, the metal filter 22 is formed by laminating a corrugated metal plate 24 in the longitudinal direction as a porous metal body and a flat metal plate 25 in a flat plate shape. For example, diesel exhaust gas as combustion exhaust gas is passed through the interlayer gap of the metal porous body, and is used to capture and remove black smoke particles contained in the diesel exhaust gas. As the material of the metal plate, stainless steel having high corrosion durability against ozone is used.

  The metal filter 22 has an edge as shown in FIG. 6 and FIG. 8 by performing, for example, pressing, roller pressing, or the like on a strip-shaped metal flat plate (for example, a stainless steel plate such as SUS304 having a thickness of about 40 μm is preferable). Is formed in a longitudinal corrugated metal plate 24 having a plurality of rectangular through holes Ha, Hb,... Having planar protrusions pa, pb. A flat metal plate 25 having a flat shape in which a large number of circular through holes Ma, Ma,... Are formed is formed, and the corrugated metal plate 24 and the flat metal plate 25 thus obtained are formed. In a state where the two are stacked, the corrugated metal plate 24 and the flat metal plate 25 are oriented in the longitudinal direction, and are wound up in a spiral shape as shown in FIG.

As shown in an enlarged view in FIG. 8, the through holes Ha and Hb are provided in the crests and troughs constituting the line-like undulations, and substantially all or the majority of the above-mentioned planar protrusions pa and pb are crests. It is provided on the side of the row-shaped recess 26 corresponding to the lower part in the part and the upper part in the valley part.
That is, the through-hole Ha drilled in the corrugated metal plate 25 has four planar protrusions pa facing each other that are bent and protruded from the back surface to the front surface side at the edge. The through-hole Hb has four planar protrusions pb that face each other and protrude from the front surface to the back surface.

In this example, as shown in FIG. 8, among the four sides constituting the edge of the through hole Ha (Hb), the two sides on the upstream side and the downstream side of the exhaust gas flow have triangular planar protrusions. pa (pb) is erected, and trapezoidal planar protrusions pa (pb) are erected on the other two sides.
Further, the through hole Ma formed in the flat metal plate 26 does not have a planar protrusion at the edge.

  The outer tube 9 is schematically composed of a long outer cylinder portion 27 having a double-sided opening, a front lid portion 28, and a disc-shaped rear lid portion 29. Further, the front lid portion 28 is provided with an opening through which the inlet pipe 12 of the inner tube 14 is inserted, and the rear lid portion 29 is provided with an opening through which the outlet tube 13 of the inner pipe 14 is inserted. In addition, an attachment / detachment opening 32 with a side cover 31 for attaching or removing the filter unit 11 or the like is provided on the peripheral side surface of the outer tube 9.

  In addition, the rear cover portion 29 is provided with attachment / detachment means 16 for detachably joining the inner tube 14 and the outer tube 9. The attaching / detaching means 16 has one or a plurality (in this example, a plurality) of long bolts 34, 34,... Made of, for example, carbon steel, and nuts (preferably double nuts) 35, 35,. Yes. Further, a force receiving plate 36 for receiving the pressing force of the long bolts 34, 34,... Is fitted to the side peripheral surface of the outlet pipe 13 of the inner pipe 14.

  Further, a disc spring contact 37 is provided in the axial gap between the inner tube 14 and the outer tube 9 on the inflow side, that is, in the axial gap between the front lid portion 17 of the inner tube 14 and the front lid portion 28 of the outer tube 9. A disc spring 38 made of a leaf spring member is provided for pressing and fixing the inner tube 14 against the outer tube 9 and absorbing thermal expansion. An opening through which the outlet pipe 13 of the inner pipe 14 is inserted is provided at the center of the disc spring 38.

  An upstream pressure sensor 41 and a downstream pressure sensor 42 for detecting clogging of the filter unit 11 are provided on the upstream side and the downstream side of the filter unit 11, respectively. As the upstream pressure sensor 41 and the downstream pressure sensor 42, for example, a semiconductor type or strain gauge type pressure sensor is used. A temperature sensor 43 is attached to the center of the outer wall surface of the outer tube 9.

In this example, as shown in FIG. 4, the gap between the outer circumferential surface of the inner tube 14 and the inner circumferential surface of the outer tube 9 is caused by a certain reason for the inner tube for the operation of the diesel engine 2. When the pressure of the exhaust gas 14 rapidly increases, it is used as an emergency detour channel K for avoiding explosive combustion such as oxygen flash.
A bypass valve (safety valve) 44 is attached to the front lid portion 17 of the inner pipe 14 for flowing the exhaust gas to the emergency bypass flow path K when it suddenly increases.

In the bypass valve (safety valve) 44, the valve rod is normally closed by the spring force of the compression coil spring. However, when the exhaust pressure in the inner pipe 14 exceeds a predetermined threshold pressure, The valve rod is retracted by the exhaust pressure in the pipe 14 to open the valve, from which the exhaust gas in the inner pipe 14 flows into the emergency bypass flow path K and is discharged out of the pipe. Has been.
In addition, a collision plate S is provided on the upstream side of the front-stage filter unit 11 in order to decelerate the diesel exhaust gas introduced from the inlet pipe 12 at a high speed and disperse it evenly in the filter unit 11. Yes.

The filter regeneration unit 5 is a supply of ozone gas in which a filter unit 11 having a metal filter 22 in which black smoke to be regenerated is accumulated (clogged) is housed in an outer tube 9 and connected to the outer tube 9 as a metal filter. The configuration is substantially the same as that of the PM removal unit 4 except that ozone gas is introduced from the ozone supply unit 6 via the path 46.
Further, an upstream pressure sensor 47 and a downstream pressure sensor 48 for detecting the regeneration state of the filter unit 11 are provided on the upstream side and the downstream side of the filter unit 11, respectively. A temperature sensor 49 is attached to the center of the outer wall surface of the outer tube 9.

The ozone supply unit 6 is an ozonizer that generates ozone gas by generating plasma (non-thermal equilibrium plasma, low temperature plasma) at atmospheric pressure and at a relatively low temperature by a discharge method (surface discharge method, silent discharge method, etc.). Have.
The ozonizer of this example is of a creeping discharge type, and as shown in FIG. 9, a gas inlet for introducing air or oxygen gas as a raw material and an outlet for discharging a gas containing the generated ozone gas. , A plurality of ceramic plates 52 made of alumina or the like on which a ground electrode 53 and a discharge electrode 54 are formed, and a ground electrode 53 of each ceramic plate 52. And an AC power source 55 for applying an AC voltage between the electrode 54 and the discharge electrode 54.

A flat ground electrode 53 is embedded in each ceramic plate 52, and a plurality of long discharge electrodes 54 are formed on the surface of the ceramic plate 52 in parallel with each other.
For example, the AC power supply 55 generates an AC voltage having a peak voltage of approximately 1 kV or higher and a frequency of approximately 1 kHz or higher. In this example, the AC power supply 55 converts the DC voltage supplied from the battery 57 connected to the diesel engine 2 into an AC voltage by an inverter and outputs the AC voltage.

  When an alternating high voltage is applied between the ground electrode 53 and the discharge electrode 54, the electric field strength at the end of the discharge electrode 54 becomes strong, and discharge occurs on the surface of the ceramic plate 52 as a dielectric. Since the discharge region is highly conductive, the region where the electric field strength is strong is the tip of the discharge region and the surface of the ceramic plate 52, and since the ground electrode 52 is formed inside the ceramic plate 52, the discharge is generated. It progresses over the entire surface of the ceramic plate 52. That is, creeping discharge occurs.

The controller 7 includes a main control unit 59 having a CPU (Central Processing Unit), a storage unit 61 for storing processing programs executed by the main control unit 59 and various data, an operation switch, and the like. An operation unit 62, a display unit 63 for displaying messages and the like, and an alarm output unit 64 are provided.
The main control unit 59 executes various processing programs stored in the storage unit 61, controls various components using various registers and flags secured in the storage unit, clogging determination processing, alarm output processing, A reproduction determination process or the like is executed.

In the clogging determination process, the main control unit 59 determines that the filter is in a clogged state when the pressure difference exceeds a predetermined value based on detection signals from both the pressure sensors 41 and 42 of the PM removal unit 4. Judge that there is.
When the main control unit 59 determines that the filter is clogged in the clogging determination process in the alarm output process, the main control unit 59 causes the alarm output unit 64 to generate an alarm sound, for example.
In the regeneration determination process, the main control unit 59 completes the regeneration of the filter when the pressure difference becomes a predetermined value or less based on the detection signals from both the pressure sensors 47 and 48 of the filter regeneration unit 5. It is determined that When the main control unit 59 determines in the regeneration determination process that the regeneration of the filter has been completed, the main control unit 59 automatically stops the ozone supply unit 6.

The storage unit 61 includes an internal storage device, a program storage area in which various processing programs such as a clogging determination processing program executed by the main control unit 59, an alarm output processing program, a reproduction determination processing program, and the like are stored. And an information storage area for storing various information such as setting information.
The internal storage device includes a semiconductor memory such as a ROM or a RAM. The operation unit 62 includes a start / stop key for the ozone supply unit 6 and the like. The display unit 63 includes a liquid crystal display that displays an alarm message, the current state of the apparatus, and the like. The alarm output unit 64 includes, for example, an indicator lamp for indicating the current state of the apparatus and a buzzer that generates an alarm sound.

Next, the operation of this example will be described with reference to FIGS. 1 to 5 and FIG.
In this example, the PM removal unit 4 removes black smoke particulates, and the filter regeneration unit 5 regenerates the clogged filter unit 11. As will be described later, if the filter regeneration process is completed within the PM removal period and at least two filter units 11 are prepared, the filter unit 11 can be continuously used in the exhaust gas purification device 1.

First, a method for mounting the filter unit 11 in the PM removal unit 4 and the filter regeneration unit 5 will be described.
When the new filter units 11, 11 are mounted in the outer tube 9 in the PM removal unit 4, that is, when the inner tube 14 is assembled in the outer tube 9, the operator uses the front lid 17 (inlet port). With the tube 12) and the rear cover 18 (outlet tube 13) mounted in advance on the outer tube 9, the side cover 31 of the attachment / detachment opening 32 is opened, and each filter unit is opened from the attachment / detachment opening 32. 11 or a joint pipe 15 with a gasket is inserted.

Next, the operator inserts the long bolt 34 of the attaching / detaching means 16 into the bolt insertion hole of the rear cover portion 29 of the outer tube 9, screws the nut 35 with a tool, and connects the outer tube 14 with the outer tube 14. A disc spring 38 is pressed into the axial gap with the tube 9.
When the long bolt 34 is tightened, the disc spring 38 is compressed and deformed, the inner tube 14 is pressed and fixed to the outer tube 9, and the inner tube 14 having an airtight structure is formed.
The same procedure is performed when the clogged filter unit 11 is mounted in the outer tube 9 in the filter regeneration unit 5.

Next, the operation of the exhaust gas purification device 1 will be described.
When diesel exhaust gas passes through the interlayer gap of the metal filter 22 of the PM removal unit 4 when the diesel engine is operated, the surface protrusions are, specifically, collision pieces / deceleration pieces, route changes Since it works as a piece or as a through-hole introduction piece, unburned black smoke particles floating in the exhaust gas are easily captured on the front and back surfaces by the surface protrusions and the metal filter 22 near the through-hole.

Some of the unburned black smoke particles that have also been captured by the metal filter 22 are heated and burned by the high-temperature metal filter 22 and the surrounding atmosphere (exhaust gas), removed from the metal filter 22, and the rest being metal It remains attached to the filter 22.
As a result, the flow that has passed through the metal filter 22 is discharged as a clean gas that does not contain black smoke particulates.
As unburned black smoke particles accumulate on the metal filter 22, clogging occurs. The main control unit 59 determines that the filter is clogged based on detection signals from both the pressure sensors 41 and 42 of the PM removal unit 4 when the pressure difference becomes a predetermined value or more. For example, an alarm sound is generated in the output unit 64 to prompt replacement of the filter.

  On the other hand, when a clogged filter is attached to the filter regeneration unit 5, the ozone gas supplied from the ozone supply unit 6 to the filter regeneration unit 5 passes through the interlayer gap of the metal filter 22. At this time, the black smoke fine particles adhering to the metal filter 22 are touched to oxidize the black smoke fine particles, thereby reacting as shown in the formulas (1) and (2). Oxidized combustion is removed

[Chemical formula 1]
C + O ₃ → CO + O ₂ (1)

[Chemical formula 2]
C + 2O ₃ → CO ₂ + O ₂ (2)

  Based on detection signals from both pressure sensors 47 and 48 of the filter regeneration unit 5, the main control unit 59 determines that the regeneration of the filter has been completed when the pressure difference becomes equal to or less than a predetermined value, and the ozone The supply unit 6 is automatically stopped.

  When the diesel engine 2 is operated, when the pressure of the exhaust gas in the inner pipe 14 suddenly increases for some reason, the bypass valve (safety valve) 44 is opened. As a result, as shown in FIG. 4, the exhaust gas in a high-pressure state passes through an open bypass valve (safety valve) 44 to hold the emergency gas between the outer peripheral surface of the inner tube 14 and the inner peripheral surface of the outer tube 9. Via the bypass channel K, it is discharged to the external space from the emergency discharge port drilled in the rear cover portion 29 of the outer tube 9. This avoids explosive combustion such as oxygen flash.

Next, the extraction method of the filter unit 11 in the PM removal unit 4 and the filter regeneration unit 5 will be described.
For example, when an alarm sound is emitted from the alarm output unit 64 and the operator is prompted to replace the filter, the operator takes out the clogged filter unit 11.
In order to take out the clogged filter unit 11 in the PM removal unit 4, the operator opens the side lid 31 of the opening / removal opening 32 and is attached to the rear lid 29 attached to the outer tube 9. The long bolt 34 of the attaching / detaching means 16 is loosened with a tool.

As a result, the disc spring 38 is released from the compression, and each part constituting the inner pipe 14 (filter units 11, 11, joint pipe 15 with gasket, front lid part 17 (inlet pipe 12), rear lid part 18 (flow) The connection of the outlet pipe 13)) is broken and disassembled.
Here, the operator takes out the clogged filter unit 11 from the opened opening 32 for attachment / detachment.
The same procedure is performed when the filter regeneration unit 5 takes out the filter unit 11 for which regeneration processing has been completed.

Next, a method for reattaching the filter unit 11 will be described.
In the PM removal unit 4, when the filter units 11, 11 are remounted in the outer tube 9, the operator again opens the side cover 31 of the attachment / detachment opening 32, The filter unit 11 and the joint pipe 15 with a gasket are inserted.
Next, the operator inserts the long bolt 34 of the attaching / detaching means 16 into the bolt insertion hole of the rear cover portion 29 of the outer tube 9, screws the nut 35 with a tool, and connects the inner tube 14 on the inflow side. A disc spring 38 is pressed into the axial clearance with the outer tube 9.
When the long bolt 34 is tightened, the disc spring 38 is compressed and deformed, the inner tube 14 is pressed and fixed to the outer tube 9, and the inner tube 14 having an airtight structure is formed again to complete the remounting.
The same procedure is performed when the filter regeneration unit 5 reattaches the clogged filter unit 11 used in the PM removal unit 4.

  As shown in FIG. 11, the inventors investigated the purification function of the PM removal unit 4 and the regeneration function of the filter regeneration unit 5 constituting the exhaust gas purification device 1 using an evaluation system 66. That is, the PM removal unit 4 is connected to the exhaust pipe of the diesel engine 2 to check the exhaust purification function, and the ozone gas is supplied from the ozone supply unit 6 to the filter regeneration unit 5 to which a filter unit that has collected PM is attached. The removal function was examined. In this test, the outer wall of the outer tube 9 of the filter regeneration unit 5 was kept warm with a heat insulating material having a thickness of about 1 [cm].

  The evaluation system 66 used here includes a gas analyzer 67 for measuring the concentration of each gas discharged from the PM removal unit 4 and an ozone analyzer for measuring the ozone gas concentration discharged from the filter regeneration unit 5. 68, a Bourdon tube pressure gauge 69 provided on the upstream side of the PM removal unit 4, and a damping tank 71 for suppressing pulsation of the Bourdon tube pressure gauge 69.

The concentration of NO _x , CO, CO ₂ , O _3, etc. is measured by the gas analyzer 67 using the measurement port. The measured gas is discharged from the exhaust port 67a.
Here, as an example, measurement was performed on gas discharged from a small stationary diesel generator (water-cooled two-cylinder, displacement 479 [cc], 3000 [rpm], rated load 5.5 [kW]). In the ozone supply unit 6, a creeping discharge type ozonizer was used as the ozonizer. This ozonizer has output characteristics as shown in Table 1. The power consumption and the like of the ozonizer can be obtained based on the panel display value of the inverter power and the data described in Table 1. In addition, [NL / min] in a unit of flow means a value at 0 [° C.] and 1 atmosphere.

Moreover, in PM removal part 4, as above-mentioned, stainless steel is used as a material of a metal filter, and the flange is clamped with a carbon steel bolt. In this test, as the outer tube (container) 9, the length of the portion where the filter unit 11 is disposed (the distance between the joint portions of both flanges) is approximately 200 [mm], and the outer diameter is approximately 56. The thing of 5 [mm] was used.
Further, the pressure on the upstream side of the PM removal unit 4 is measured by a Bourdon tube pressure gauge 69, and the filter unit 11 of the PM removal unit 4 is replaced when the differential pressure reaches a predetermined value.

When the diesel engine 2 starts its operation, the diesel engine 2 sucks the air Q1 to burn the fuel, and discharges the exhaust gas Q2 toward the PM removal unit 4. The PM removal unit 4 removes the black smoke particles in the exhaust gas Q2, and then discharges the purified gas Q3.
The ozonizer inhales air Q4 as a raw material, the flow rate is 10 [NL / min], the pressure is 0.05 [MPa], the concentration is 2.1 [%] (power consumption 380 [W], the current is 2.0 [A]. ) To supply the ozone gas Q5 to the filter regeneration unit 5. From the filter regeneration unit 5, the gas Q6 generated as a result of the reaction shown by the above-described equations (1) and (2) is discharged.

  First, the relationship between the elapsed time from the start of operation of the diesel engine 2 and the mass (integrated value) of the black smoke particulates (PM) collected and deposited in the PM removal unit 4 was measured. Thereby, the result as shown in FIG. 12 was obtained. The mass of the black smoke particles was measured by taking out the filter unit 11 at regular intervals and using an electronic balance.

Further, the concentration of each component of the exhaust gas was measured by the gas analyzer 67 while changing the load of the diesel engine. As a result, a result as shown in FIG. 13 was obtained. In FIG. 13, broken lines La, Lb, Lc, Ld, Le, and Lf indicate the measurement results of the concentrations of NO, NO ₂ , O ₂ , NO _x , CO, and CO ₂ with changes in the diesel engine load, respectively. .
As can be seen from the measurement results shown in FIG. 13, it can be seen that a maximum of about 650 [ppm] of NO _x is generated.

Further, the relationship between the elapsed time from the start of activation of the ozonizer (plasma application start) and the concentration of each component of the gas discharged from the filter regeneration unit 5 was measured. At the same time, the relationship between the elapsed time and the temperature of the outer wall surface of the outer tube 9 of the filter regeneration unit 5 was measured.
Thereby, the result as shown in FIG. 14 was obtained. In FIG. 14, broken lines Lg, Lh, and Li indicate the measurement results of the concentrations of CO and CO ₂ with the elapsed time, and the temperature of the outer wall surface of the outer tube 9 of the filter regeneration unit 5.

As can be seen from the measurement results shown in FIG. 14, the maximum value of the CO concentration during filter regeneration was 3500 [ppm], and the maximum value of the CO ₂ concentration was 7000 [ppm]. Further, since the concentration of CO _x is increased after the ozonizer is started, it can be confirmed that the black smoke particulates are burned, that is, the filter is being regenerated. The O ₃ concentration at the time of regeneration is, for example, 4000 [ppm], but may be 0 after an elapsed time of 5 [min] when the concentration of CO _x is maximum. It can be seen that the exhaust gas contains a large amount of highly combustible O ₃ and CO.

  Further, the temperature of the outer wall surface of the outer tube 9 of the filter regeneration unit 5 at the time of filter regeneration reaches approximately 60 [° C.], and the temperature is increased by the combustion exothermic reaction of the black smoke particulates represented by the equations (1) and (2) Was confirmed to have risen. After the test was completed, the filter unit was removed and the cross section was confirmed. As a result, combustion removal of PM was confirmed with the naked eye.

In this test, the mass reduction amount of the filter regeneration unit 5 during 20 [min] in which the ozonizer was operated was 0.50 [g] when estimated from the amount of CO _x generated. Moreover, the mass reduction amount measured using the electronic balance was 0.65 [g]. The amount of mass reduction of 0.50 [g] in terms of CO _x is approximately 45 [min] even when the diesel engine is loaded at 100 [%] (5.5 [kW] in this example). Since the regeneration (removal) speed is 2.2 times or more of the collection speed, continuous PM removal and continuous filter while switching the filter unit while continuing the operation of the diesel engine It can be seen that playback is possible.
In addition, the plasma energy SED per unit flow rate of exhaust gas is 8.8 [Wh / m ³ ], and it can be regenerated at about 7% of the diesel engine output and 2.2 times the collection speed. Was confirmed.

As described above, according to the configuration of this example, the surface pore shape of the metal filter 11 is devised, so that particulate matter (PM) such as black smoke particulates contained in the exhaust gas is captured with high efficiency. It can be removed and the exhaust gas can be cleaned.
In addition, ozone gas as an oxidant is introduced from the independent ozone supply unit 6 into the filter regeneration unit 5 to oxidize and remove particulate matter such as black smoke particulates. For example, the temperature of exhaust gas, NO Regardless of combustion conditions such as the amount of oxidizer such as _x and diesel engine operating condition (load ratio, etc.), the black smoke particulates accumulated on the filter are always removed reliably and the filter is regenerated reliably. can do.

Furthermore, since it is possible to perform oxidative combustion removal with low energy using ozone gas, the black smoke particulates deposited on the filter while contributing to energy saving with a simple structure at low cost and with relatively low power consumption. Etc. can be reliably removed and the filter can be regenerated.
Further, at the same time as the black smoke particulates are removed by the PM removal unit 4, the clogged filter unit 11 can be regenerated by the filter regeneration unit 5, and the filter regeneration process can be completed within the PM removal period. If the filter unit 11 is prepared, it can be switched and the filter unit 11 can be continuously used in the exhaust gas purification device 1 for PM removal.
Further, the exhaust gas purification device 1 can contribute to the preservation of the global environment.

FIG. 15 is a diagram showing a configuration of an exhaust gas purification apparatus according to Embodiment 2 of the present invention, FIG. 16 is a block diagram showing a configuration of a controller of the exhaust gas purification apparatus, and FIG. It is explanatory drawing for demonstrating operation | movement of an apparatus.
The exhaust gas purification apparatus of this example is greatly different from the exhaust gas purification apparatus of Example 1 described above. In Example 1, the PM removal unit 4 and the filter regeneration unit 5 have a PM removal function and a filter regeneration function, respectively. In contrast to being fixed, the first removal / regeneration unit 74 and the second removal / regeneration unit 75 alternately switch between the PM removal function and the filter regeneration function, and a four-way valve as a direction control valve And the ozone gas introduced and discharged for filter regeneration is recirculated to the diesel engine.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the same components as those of the first embodiment are denoted by the same reference numerals as those used in FIG. The description will be simplified.

  As shown in FIG. 15, the exhaust gas purifying device 73 of this example is connected to a discharge path 3 of a diesel engine 2 as an internal combustion engine and used to purify exhaust gas discharged from the diesel engine 2. The first removal / regeneration unit 74 and the second removal / having both a PM removal function for capturing and removing diesel particulates (PM) and burning and a filter regeneration function for regenerating the filter on which diesel particulates are deposited. A regenerator 75; an ozone supply unit 6 for supplying ozone to the filter regenerator 5; an upstream four-way valve 76 and a downstream four-way valve 77 as direction control valves for switching the flow path; and a controller 78. Yes.

In this example, the controller 78 controls the first removal / regeneration unit 74 and the second removal / regeneration unit 75 so that the PM removal function and the filter regeneration function are alternately switched.
The ozone gas discharged from the first removal / regeneration unit 74 (second removal / regeneration unit 75) when the filter regeneration process is performed in the first removal / regeneration unit 74 (second removal / regeneration unit 75). A recirculation pipe 79 for returning a part of the exhaust gas including the gas to the intake port side of the diesel engine 2 is provided.

The first removal / regeneration unit 74 and the second removal / regeneration unit 75 have substantially the same configuration as the PM removal unit 4 and the filter regeneration unit 5 described in the first embodiment. However, the first removal / regeneration unit 74 and the second removal / regeneration unit 75 are connected to the upstream four-way valve 76 on the upstream side and to the downstream four-way valve 77 on the downstream side.
Further, an upstream pressure sensor 81 (84) and a downstream pressure sensor 82 (85) for detecting clogging of the filter unit 11 of the first removal / regeneration unit 74 (second removal / regeneration unit 75) are respectively provided. The filter unit 11 is provided on the upstream side and the downstream side. A temperature sensor 83 (86) is attached to the center of the outer wall surface of the outer tube 9.

  The upstream four-way valve 76 is connected to the exhaust path 3 of the diesel engine 2, the ozone supply path 46 of the ozone supply unit 6, the inlet pipe 12 of the first removal / regeneration unit 74, and the flow of the second removal / regeneration unit 75. As shown in FIG. 15, the inlet pipe 12 of the first removal / regeneration unit 74 is connected to the discharge path 3 of the diesel engine 2 and is connected to the inlet pipe 12 and controlled by the controller 78. A connection state in which the inlet pipe 12 of the regeneration unit 75 is connected so that gas can flow to the ozone supply path 46 of the ozone supply unit 6, and the inlet of the first removal / regeneration unit 74 as shown in FIG. Connection state in which the pipe 12 is connected to the ozone supply path 46 of the ozone supply unit 6 and the inlet pipe 12 of the second removal / regeneration unit 75 is connected to the exhaust path 3 of the diesel engine 2 so that gas can flow. Switch between Used in order.

  Note that the upstream side four-way valve 76 causes the inlet pipe 12 and the ozone supply path 46 of the first removal / regeneration section 74 and the inlet pipe 12 and the discharge path of the second removal / regeneration section 75 in the connection state shown in FIG. 3 are in a non-connected state in which gas cannot flow. In the connected state shown in FIG. 17, the inlet pipe 12 and the discharge path 3 of the first removal / regeneration unit 74 and the flow of the second removal / regeneration unit 75 are not connected. Both the inlet pipe 12 and the ozone supply path 46 are in a non-connected state in which gas cannot flow.

  The downstream four-way valve 77 includes an outlet pipe 13 of the first removal / regeneration unit 74, an outlet pipe 13 of the second removal / regeneration unit 75, a discharge path 87 of the exhaust gas purification device 73, and an ozone supply. 15 is connected to the ozone supply path 46 of the unit 6 and is controlled by the controller 78 so that the gas can flow through the outlet path 13 of the first removal / regeneration unit 74 to the discharge path 87 as shown in FIG. In addition to the connection, the outlet pipe 13 of the second removal / regeneration unit 75 is connected to the ozone supply path 46 of the ozone supply unit 6, and the outlet of the first removal / regeneration unit 74 as shown in FIG. A second connection state in which the pipe 13 is connected to the ozone supply path 46 of the ozone supply unit 6 and the outlet pipe 13 of the second removal / regeneration unit 75 is connected to the discharge path 87 so that gas can flow. Used to switch between.

  Note that, in the connected state shown in FIG. 15, the outlet side pipe 13 and the ozone supply path 46 of the first removal / regeneration unit 74 and the outlet pipe 13 and the discharge path of the second removal / regeneration unit 75 are connected by the downstream side four-way valve 77. 87 is in a non-connected state in which gas cannot flow. In the connected state shown in FIG. 17, the outlet pipe 13 and the discharge path 87 of the first removal / regeneration unit 74 and the flow of the second removal / regeneration unit 75 are not connected. Both the outlet pipe 13 and the ozone supply path 46 are in a non-connected state in which gas cannot flow.

The controller 78 in this example includes a main control unit 89 having a CPU (central processing unit), a storage unit 91 for storing processing programs executed by the main control unit 89, various data, and the like, and an operation switch. And the like, a display unit 93 for displaying a message, a valve control unit 94 for controlling the four-way valve, and an alarm output unit 95.
The main control unit 89 executes various processing programs stored in the storage unit 91, controls each component using various registers and flags secured in the storage unit 91, and performs clogging determination processing and alarm output processing. , Filter switching processing, regeneration determination processing, and the like are executed.

In the clogging determination process, the main control unit 89 detects from the pressure sensors 81 and 82 (84, 85) of the first removal / regeneration unit 74 (second removal / regeneration unit 75) performing the PM removal process. Based on the signal, it is determined that the filter is clogged when the pressure difference is equal to or greater than a predetermined value.
When the main control unit 89 determines that the filter is clogged in the clogging determination process in the alarm output process, the main control unit 89 causes the alarm output unit 64 to generate a switching notification sound, for example.

  In the regeneration determination process, the main control unit 58 receives the pressure from the pressure sensors 81 and 82 (84 and 85) of the first removal / regeneration unit 74 (second removal / regeneration unit 75) performing the filter regeneration process. Based on the detection signal, it is determined that the regeneration of the filter is completed when the pressure difference is equal to or smaller than a predetermined value. When the main control unit 59 determines in the regeneration determination process that the regeneration of the filter has been completed, the main control unit 59 automatically stops the ozone supply unit 6.

  Further, when the main control unit 59 determines that the filter is clogged in the clogging determination process when the PM removal process is performed in the first removal / regeneration unit 74 in the filter switching process, The upstream four-way valve 76 and the downstream four-way valve 77 are controlled via the control unit 94 to connect the inlet pipe 12 of the first removal / regeneration unit 74 to the ozone supply path 46 of the ozone supply unit 6, and 2 The inlet pipe 12 of the removal / regeneration unit 75 is connected to the exhaust path 3 of the diesel engine 2 so that gas can flow.

  When the main control unit 59 determines that the filter is clogged in the clogging determination process when the second removal / regeneration unit 75 performs the PM removal process in the filter switching process, The upstream four-way valve 76 and the downstream four-way valve 77 are controlled via the control unit 94 to connect the inlet pipe 12 of the first removal / regeneration unit 74 to the discharge path 3 of the diesel engine 2 and to perform the second removal. / The inlet pipe 12 of the regeneration unit 75 is connected to the ozone supply path 46 of the ozone supply unit 6 so that gas can flow.

  The storage unit 91 includes a program storage area in which various processing programs such as a clogging determination processing program executed by the main control unit 89, an alarm output processing program, a filter switching processing program, a regeneration determination processing program, and the like are stored. And an information storage area for storing various information such as various setting information such as a preset pressure difference used for determination and regeneration determination.

Next, the operation of this example will be described with reference to FIGS.
First, according to the method described in the first embodiment, the operator installs new filter units 11 and 11 in the outer tube 9 in the first removal / regeneration unit 74 and the second removal / regeneration unit 75.
Next, the main control unit 89 controls the first removal / regeneration unit 74 to perform the PM removal process and put the second removal / regeneration unit 75 into a pause state, for example. That is, the main control unit 89 controls the upstream four-way valve 76 and the downstream four-way valve 77 via the valve control unit 94, and connects the inlet pipe 12 of the first removal / regeneration unit 74 to the exhaust path of the diesel engine 2. 3 and the inlet pipe 12 of the second removal / regeneration unit 75 is connected to the ozone supply path 46 of the ozone supply unit 6 so that gas can flow.

  When the diesel engine passes through the interlayer gap of the metal filter 22 of the first removal / regeneration unit 74 that is performing the PM removal process during the diesel engine operation, Works as a collision piece / deceleration piece, a course changing piece, or as a through-hole introduction piece, so that unburned black smoke particles floating in the exhaust gas appear on the surface protrusions and the metal filter 22 near the through-hole. It becomes easy to be captured on the back surface.

Some of the unburned black smoke particles that have also been captured by the metal filter 22 are heated and burned by the high-temperature metal filter 22 and the surrounding atmosphere (exhaust gas), removed from the metal filter 22, and the rest being metal It remains attached to the filter 22.
As a result, the flow that has passed through the metal filter 22 is discharged as a clean gas that does not contain black smoke particulates.

As unburned black smoke particles accumulate on the metal filter 22, clogging occurs. In the clogging determination process, the main control unit 89 detects the filter when the pressure difference exceeds a predetermined value based on the detection signals from both the pressure sensors 81 and 82 of the first removal / regeneration unit 74. If it is determined that the clogged state is present, for example, a switching notification sound is generated in the alarm output unit 64, the ozone supply unit 6 is activated by the filter switching process, and the upstream side four-way valve 76 and The downstream four-way valve 77 is controlled to connect the inlet pipe 12 of the first removal / regeneration unit 74 to the discharge path 3 of the diesel engine 2 and to connect the inlet pipe 12 of the second removal / regeneration unit 75 to the ozone supply unit. 6 is connected to the ozone supply path 46 so that the gas can flow therethrough.
As a result, the main control unit 59 switches the first removal / regeneration unit 74 to perform the filter regeneration process and simultaneously causes the second removal / regeneration unit 75 to perform the PM removal process.

  The ozone gas supplied from the ozone supply unit 6 to the first removal / regeneration unit 74 performing the filter regeneration process from the ozone supply unit 6 adheres to the metal filter 22 when passing through the interlayer gap of the metal filter 22. The black smoke fine particles are touched to oxidize the black smoke fine particles, thereby reacting as shown in the equations (1) and (2), and the black smoke fine particles are oxidized and removed by oxidation.

Based on the detection signals from both pressure sensors 81 and 82 of the first removal / regeneration unit 74, the main control unit 89 determines that the regeneration of the filter has been completed when the pressure difference becomes a predetermined value or less. Then, the ozone supply unit 6 is automatically stopped.
On the other hand, in the second removal / regeneration unit 75, when the PM removal process is performed and it is determined that the filter is clogged, the first removal / regeneration unit 74 is switched to perform the filter regeneration process. .

As described above, the PM removal function and the filter regeneration function are alternately switched between the first removal / regeneration unit 74 and the second removal / regeneration unit 75, and PM removal and filter regeneration are performed continuously and simultaneously. Is done.
Further, as described in the first embodiment, the gas discharged from the first removal / regeneration unit 74 (second removal / regeneration unit 75) that performs the filter regeneration process includes O ₃ , which has high combustibility, It is confirmed in the evaluation test that a large amount of CO is contained, and the output of the diesel engine 2 is improved by returning to the intake port of the diesel engine 2.

As described above, according to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.
In addition, since the first removal / regeneration unit 74 and the second removal / regeneration unit 75 are configured to switch between the PM removal function and the filter regeneration function and automatically switch them, it takes time and effort. Therefore, the filter can be kept clean at all times, the filter is not only cleaned but also semi-permanently not required to be replaced, and the cost and labor required for maintenance of the exhaust gas purification device 1 can be reduced.
Moreover, since the exhausted ozone gas used for filter regeneration is recirculated to the diesel engine 2, the combustion efficiency of the diesel engine 2 can be improved. Moreover, discharge of harmful gas to the outside air can be prevented.

FIG. 18 is an explanatory diagram for explaining the configuration of the exhaust gas purifying apparatus and the filter regeneration method according to the third embodiment of the present invention.
The exhaust gas purification apparatus of this example is greatly different from the filter regeneration method of the first embodiment described above in that the filter regeneration is performed by an independent dedicated filter regeneration apparatus.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.

As shown in FIG. 18, the exhaust gas purifying device 97 of this example is connected to the exhaust path 3 of the diesel engine 2 as an internal combustion engine and used for purifying exhaust gas exhausted from the diesel engine 2. Thus, a PM removal unit 98 for capturing and removing diesel particulates (PM) and combustion and a controller 99 are provided.
The PM removal unit 98 has substantially the same configuration as the PM removal unit 4 and the filter regeneration unit 5 described in the first embodiment. Further, an upstream pressure sensor 101 and a downstream pressure sensor 102 for detecting clogging of the filter unit 11 of the PM removal unit 98 are provided on the upstream side and the downstream side of the filter unit 11, respectively. A temperature sensor 103 is attached to the center of the outer wall surface of the outer tube 9.

In this example, the filter unit 11 of the PM removal unit 98 is regenerated using a dedicated filter regeneration device 104 disposed in a predetermined place (for example, a gas station or a factory).
The filter regeneration device 104 has one or a plurality (in this example, a plurality) of filter regeneration units 105, 105,..., And an ozone supply unit 106 that supplies ozone gas to each filter regeneration unit 105. Each filter regeneration unit 105 includes the PM removal unit 4 and the outer tube 9 of the filter regeneration unit 5 described in the first embodiment.

  As described above, according to the configuration of this example, it is possible to perform oxidative combustion removal with low energy using ozone gas. Therefore, regeneration by high-temperature air combustion (for example, air at 600 ° C.) using a conventional electric furnace or the like. Compared to the above, it is possible to regenerate the filter by reliably removing the black smoke particles and the like deposited on the filter at low cost and contributing to energy saving with a simple configuration.

FIG. 19 is a schematic cross-sectional view showing the configuration of the filter unit of the exhaust gas purifying apparatus that is Embodiment 4 of the present invention.
The exhaust gas purifying apparatus of this example is greatly different from the exhaust gas purifying apparatus of the first embodiment described above in that the filter unit is a combination of a plurality of types of filters.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.

The filter unit 108 includes, for example, metal filters 22 and 22 disposed on the upstream side and a ceramic honeycomb filter 113 disposed on the downstream side in a container 112 having an exhaust gas inlet 109 and an outlet 111. Is housed and is schematically configured.
In the metal filter 22, relatively coarse particles in the exhaust gas are removed, and relatively fine particles are removed by the honeycomb filter 113.
Here, the material and shape of the container 112 are not particularly limited, but in this example, a stainless steel cylindrical container is used.

As described above, according to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.
In addition, the rate of decrease in pressure loss can be suppressed.

FIG. 20 is a diagram showing a configuration of an ozone supply section of an exhaust gas purifying apparatus that is Embodiment 5 of the present invention.
The exhaust gas purifying apparatus of this example is greatly different from the exhaust gas purifying apparatus of the first embodiment described above. The ozone supply unit includes an ozonizer that generates ozone and a gas supply apparatus that supplies air or oxygen to the ozonizer. It is a point that has been configured.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.

In this example, the ozone supply unit 115 includes an ozonizer 116 that generates ozone, and an oxygen supply unit 117 that supplies air or oxygen to the ozonizer 116.
The ozonizer 116 has substantially the same configuration as the ozonizer described in the first embodiment.
In the oxygen supply unit 117, for example, at least one of an oxygen adsorbent, an oxygen separation membrane, a nitrogen adsorbent, and a nitrogen separation membrane is disposed.

As described above, according to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.
In addition, ozone gas can be generated with high efficiency.

The exhaust gas purification apparatus of this example is greatly different from the exhaust gas purification apparatus of Example 1 described above, for example, in that a catalyst is supported on a metal filter.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.
For example, at least one selected from platinum, palladium, rhodium, potassium, barium, lithium, sodium, and the like is selected as a catalyst for promoting combustion of black smoke fine particles.

As described above, according to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.
In addition, the diesel particulate removal efficiency can be improved.

FIG. 21 is a diagram showing a configuration of an exhaust gas purifying apparatus that is Embodiment 7 of the present invention.
The exhaust gas purifying apparatus of this example is greatly different from the exhaust gas purifying apparatus of Example 1 described above in that a NO _x processing apparatus for processing nitrogen oxides is disposed downstream of the PM removal unit. is there.
Since the other configuration is substantially the same as the configuration of the first embodiment described above, the description thereof will be simplified.

As shown in FIG. 21, the exhaust gas purifying device 119 of this example is connected to the exhaust path 3 of the diesel engine 2 as an internal combustion engine and is used to purify exhaust gas exhausted from the diesel engine 2. In particular, a PM removal unit 4 for capturing and removing diesel particulates (PM), a filter regeneration unit 5 for regenerating a filter on which diesel particulates are deposited, and ozone supplying ozone to the filter regeneration unit 5 A supply unit 6, a NO _x processing device 121 disposed on the downstream side of the PM removal unit 4, and a controller 7 are provided.
As the NO _x treatment device 121, for example, a honeycomb structure carrying a NO _x storage reduction catalyst, urea SCR (Selective Catalytic Reduction), or the like is used.

As described above, according to the configuration of this example, substantially the same effect as that of the first embodiment described above can be obtained.
In addition, not only diesel particulates but also nitrogen oxides can be removed at the same time, and exhaust gas can be further purified.

FIG. 22 is a side view showing a schematic configuration of the PM removal unit and the filter regeneration unit of the exhaust gas purifying apparatus according to Embodiment 8 of the present invention, and FIG. 23 is a schematic configuration of the PM removal unit and the filter regeneration unit. FIG.
The exhaust gas purifying apparatus of this example is greatly different from the exhaust gas purifying apparatus of the second embodiment described above, and the first removal / regeneration unit 74 and the second removal / regeneration unit 75 are adjacent to each other and the PM removal process is being performed. The heat of the filter unit is conducted to the filter unit being regenerated and the regeneration of the filter is promoted by heat exchange.
Since the configuration other than this is substantially the same as the configuration of the second embodiment described above, the description thereof will be simplified.

The exhaust gas purification apparatus of this example is connected to an exhaust path 3 of a diesel engine 2 as an internal combustion engine and is used for purifying exhaust gas discharged from the diesel engine 2, both of which are diesel particulate (PM) A first removal / regeneration unit 74 and a second removal / regeneration unit 75 having a PM removal function for capturing and removing the particulate matter and a filter regeneration function for regenerating the filter on which diesel particulates are deposited, and a filter regeneration unit 5, an ozone supply unit 6 that supplies ozone, an upstream four-way valve 76 and a downstream four-way valve 77 as direction control valves for switching the flow path, and a controller 78.
Further, the first removal / regeneration unit 74 and the second removal / regeneration unit 75 are formed by a combination 123 made of a high heat conductive material such as ceramic or metal so that the outer walls of the outer tubes 9 and 9 are joined to each other. Are combined.

As described above, according to the configuration of this example, substantially the same effect as that of the second embodiment described above can be obtained.
In addition, since the filter temperature can be kept relatively high during regeneration, the regeneration speed of the filter can be improved.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention.
For example, the ozone generator (ozonizer) may be a creeping discharge type or silent discharge type ozone generator, or a cryogenic operation glow discharge type ozone generator. Further, the present invention is not limited to the discharge method, but may be an ultraviolet irradiation method, an ozone generator using water electrolysis, or an ozone cylinder.

In addition, the active gas for burning the black smoke fine particles or the like is not limited to ozone gas. In general, an activated gas that is activated by a plasma generator may be used. For example, NO ₂ or volatile organic compounds (VOC) such as toluene and xylene may be used.
Moreover, you may make it react the raw material gas with the plasma produced | generated beforehand in the reaction container, and may produce | generate active gas.
Further, the active gas only needs to be supplied to the filter on which black smoke particulates or the like are deposited, and the filter is not necessarily stored in a sealed container in the filter regeneration unit.

  Further, in the first embodiment, the case where the filter unit is manually replaced has been described. For example, the filter is housed in a container having a gas inlet and outlet and a gas inlet and outlet. The plurality of filter units are rotated around a rotation axis along the flow path by a motor, and a predetermined filter unit is sealed at an inflow portion and an outflow portion with fixed inlets and outlets. It may be arranged on the flow path of the exhaust gas or the active gas so as to be fitted through, or another filter unit may be removed from the flow path at the same time.

In the first embodiment, the case of using a flat plate ozonizer is described, but a cylindrical shape may be used. Further, for example, oxygen may be supplied to the ozonizer from an oxygen cylinder, or air may be introduced as it is.
Further, in the first embodiment, the case where one PM removing unit and one filter regeneration unit are arranged has been described. However, a plurality of PM removing units and one filter regeneration unit may be provided, or may be connected in series or in parallel. Moreover, you may make it provide what makes it pause for a predetermined period among the arrange | positioned filters.

In the first embodiment, for example, when the regeneration time is set to be approximately half of the removal time according to the regeneration capability of the filter regeneration unit, two PM removal units and one filter regeneration unit are provided. As an alternative, the filter regeneration unit may perform processing for two filter units simultaneously.
Moreover, in Example 1, although the case where the filter was taken out and replaced | exchanged from the attachment / detachment opening provided in the side surface of the container was described, you may make it replace | exchange every container.
In the first embodiment, the fine particle removing unit and the filter regeneration unit may be integrated with each other (for example, in the case of on-vehicle use (diesel vehicle or the like)), and the container may be common. Moreover, you may arrange | position in the isolate | separated state.

Moreover, in Example 1, although the case where it was set as the double pipe structure so that an exhaust-gas bypass distribution channel was formed between an inner tube and an outer tube was described, it is not necessary to provide a bypass distribution channel. Moreover, you may make it provide a bypass distribution channel in any one among PM removal part and a filter reproduction | regeneration part. In particular, in the filter regeneration unit, the bypass circulation passage and the bypass valve (pressure valve) may be omitted.
In the first embodiment, the ozonizer may be started / stopped directly without using a controller.

In the first embodiment, the filter regeneration unit may eliminate the temperature sensor.
In the first embodiment, an external storage device may be provided as the storage unit of the controller. That is, as an external storage device, an FD driver to which an FD (flexible disk) is mounted, an HD driver to which an HD (hard disk) is mounted, an MO disk driver to which an MO (magneto-optical) disk is mounted, or a CD ( CD / DVD driver to which a compact disk (ROM), CD-R (Recordable), CD-RW (ReWritable), DVD (digital video disk) -ROM, DVD-R, DVD-RW, etc. are mounted It may be provided.

In the first embodiment, an alarm message may be displayed on the display unit.
In the first embodiment, the filter unit may be configured by combining a metal filter and, for example, a platinum-based oxidation catalyst disposed on the upstream side of the metal filter and supported on a metal mesh.
Further, in the first embodiment, the metal filter may be configured to exclude the flat metal plate.
Further, in the first embodiment, blades may be provided along the axis of the filter unit so as to ensure a gap between the outer tube and the inner tube.

In the first embodiment, the main control unit 59 may automatically stop the ozone supply unit 6 after a certain period of time has elapsed since startup, or may stop the ozone supply unit 6 simultaneously with the clogging determination, for example. .
In the first embodiment, the case of using a wound-up metal filter has been described. However, the metal filter is not limited to a wound-up shape, and may be used in a folded shape, for example.

In the first embodiment, the case where two stages of filter units are provided in series has been described. However, a single filter unit may be provided, or three or more stages of filter units may be provided in series. However, the filter units may be arranged in parallel and switched for use.
Moreover, in Example 1, you may make it switch periodically the inflow direction of the gas to a filter unit, for example using a branch pipe and a three-way valve. Thereby, the collection density of the black smoke fine particles of the filter can be made uniform, and the removal efficiency can be improved.

In Example 2, the outer wall of the container may be covered with a heat insulating material. Moreover, you may comprise so that the exhaust_gas | exhaustion from a regeneration apparatus may be returned to the intake port of a diesel engine.
In the second embodiment, the filter unit may be switched according to the pressure difference, and an alarm may be issued.
In the second embodiment, switching may be performed in a relatively short time before clogging is detected.
Further, in Example 2, when it is considered that almost all ozone gas is consumed, or when there is no safety problem with the components of the exhaust gas, the exhaust gas may be discharged to the outside without being recirculated to the diesel engine. .

In the second embodiment, it may be switched periodically using a timer. In this case, the pressure sensor may be eliminated.
In the second embodiment, the case where two removal / regeneration units are provided has been described. However, three or more removal / regeneration units may be arranged. Alternatively, the PM removal process and the filter regeneration process may be switched alternately with one removal / regeneration unit.

In this case, the filter regeneration process is performed, for example, during the downtime of the diesel engine. Further, a plurality of units may be subjected to only PM removal processing and filter regeneration processing at the same time to improve processing capability, for example, to increase the PM removal continuation time.
Further, one removal / regeneration unit may be simultaneously connected to the exhaust path of the diesel engine and the ozone supply path of the ozone supply unit, and the exhaust gas and the ozone gas may be simultaneously introduced into the removal / regeneration unit. .
Further, in the second embodiment, the gas containing ozone gas may be discharged after the filter regeneration process without necessarily being circulated.
Further, in the second embodiment, the switching may be performed when the filter regeneration is completed.

Further, in Example 3, when a plurality of filter regeneration units are connected to one ozone supply unit, they may be connected in parallel, or at least some of the filters, for example, black smoke particulates are deposited more. You may connect in series in order.
In Example 3, a nitrogen oxide treatment apparatus for treating nitrogen oxides may be disposed downstream of the PM removal unit.
Also in the first embodiment, the filter being burned and removed may be adjacent to the filter being regenerated, and the regeneration of the filter may be promoted by heat exchange.

In Example 4, a porous foam filter may be added.
In Example 6, for example, a ceramic honeycomb filter may be used instead of the metal filter, or catalyst-carrying ceramic particles may be filled in the gap space of the metal filter. The catalyst-supporting ceramic particles are made of, for example, alumina, beryllia, silicon nitride, boron nitride, silicon carbide, zirconia, cordierite, etc., and are formed into a sintered body produced by heating the raw ceramic powder at a predetermined high temperature. Obtained by supporting a catalyst.
In the seventh embodiment, the NO _x processing device 121 may be arranged on the upstream side. Further, the PM removal unit and the NO _x treatment device may be in contact with each other or may be separated from each other.

  The present invention can be applied to a diesel engine mounted on a moving body (automobile, train, ship, etc.), a diesel engine used in a stationary generator, and the like, and an internal combustion engine other than a diesel engine. In addition to internal combustion engines, combustion apparatuses using diffusion combustion, such as pulverized coal combustion furnaces, heavy oil combustion furnaces, gas turbines, hydrocarbon combustion fuels that generate PM such as cogeneration, etc. Applicable to combustion devices. Further, the present invention can be applied to remove nitrogen oxides or the like in exhaust gas discharged from a nitric acid production factory or the like. Moreover, it can incorporate in the flow path of different gas and can be used for the purification | cleaning of gas.

It is a figure which shows the structure of the exhaust gas purification apparatus which is Example 1 of this invention. It is a side view which shows schematic structure of PM removal part and filter regeneration part of the same exhaust gas purification apparatus. It is a perspective view which shows schematic structure of the PM removal part and the filter reproduction | regeneration part. It is sectional drawing which partially fractures and shows schematic structure of the PM removal part and the filter reproduction | regeneration part. It is a perspective view for demonstrating the structure of the attachment or detachment means of the PM removal part and the filter reproduction | regeneration part. It is a perspective view which shows the structure of the metal filter of the filter unit of the PM removal part and the filter regeneration part. It is sectional drawing which shows the structure of the metal filter. It is a perspective view which shows the structure of the corrugated metal plate of the same metal filter. It is a figure which shows the structure of the ozone supply part of the same exhaust gas purification apparatus. It is a block diagram which shows the structure of the controller of the same exhaust gas purification apparatus. It is a figure which shows the structure of the evaluation system for evaluating the function of the same exhaust gas purification apparatus. It is a directional diagram which shows the relationship between the elapsed time from the PM removal start by the PM removal part, and the mass of PM collected by the PM removal part. It is a schematic diagram which shows the relationship between the ratio of the load of the diesel engine which connected the same exhaust gas purification apparatus, and the density | concentration of the gas component discharged | emitted from the PM removal part. The relationship between the elapsed time from the start of filter regeneration by the filter regeneration unit and the concentrations of carbon monoxide and carbon dioxide gas discharged from the filter regeneration unit, and the elapsed time and the outer wall of the container of the filter regeneration unit It is a schematic diagram which shows the relationship between temperature. It is a figure which shows the structure of the exhaust gas purification apparatus which is Example 2 of this invention. It is a block diagram which shows the structure of the controller of the same exhaust gas purification apparatus. It is explanatory drawing for demonstrating operation | movement of the same exhaust gas purification apparatus. It is explanatory drawing for demonstrating the structure and filter regeneration method of the exhaust gas purification apparatus which are Example 3 of this invention. It is a schematic cross section which shows the structure of the filter unit of the exhaust gas purification apparatus which is Example 4 of this invention. It is a figure which shows the structure of the ozone supply part of the exhaust-gas purification apparatus which is Example 5 of this invention. It is a figure which shows the structure of the exhaust gas purification apparatus which is Example 7 of this invention. It is a side view which shows schematic structure of PM removal part and filter regeneration part of the exhaust gas purification apparatus which is Example 8 of this invention. It is sectional drawing which shows schematic structure of the PM removal part and the filter reproduction | regeneration part. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art.

Explanation of symbols

1,73,97,119 Exhaust gas purification device (particulate matter removal device)
2 Diesel engine (internal combustion engine)
4 PM removal part (filter part)
5 Filter regeneration unit 6 Ozone supply unit (active gas generation means, ozone generation device)
7, 78, 99 Controller 22 Metal filter 41, 47 Upstream pressure sensor (part of clogging detection means)
42, 48 Downstream pressure sensor (part of clogging detection means)
59, 89 Main control unit (switching control means, part of clogging detection means)
74 First removal / reproduction unit (removal / reproduction unit)
75 Second removal / reproduction unit (removal / reproduction unit)
76 Upstream four-way valve (channel direction switching means)
104 Filter regeneration device 113 Honeycomb filter 115 Ozone supply unit (gas supply device)
121 NO _x treatment equipment (nitrogen oxide treatment equipment)
123 Combined body (heat exchange means)

Claims (14)

An active gas that promotes an oxidation reaction from a raw material gas is generated by a filter unit for capturing particulate matter in the exhaust gas, or capturing and removing the particulate matter in the exhaust gas, which is incorporated in the exhaust gas flow path, and a plasma reaction. A particulate matter removing device comprising an active gas generating means for supplying the particulate matter deposited to the filter unit,
The filter unit in which the particulate matter is deposited is disposed, receives the supply of the active gas from the active gas generation unit, and is burned and removed using the active gas of the particulate matter deposited on the filter unit. Particulate matter removing apparatus comprising a filter regeneration unit for regenerating the part.   When the exhaust gas or the active gas is flown and the exhaust gas flows in, the particulate matter in the exhaust gas is captured, or the function of the filter unit for capturing and removing by combustion, and the active gas flows in, One of the removal / regeneration unit having the function of the filter regeneration unit that removes the particulate matter by oxidizing and burning with the active gas, and the exhaust gas and the active gas in the removal / regeneration unit The particulate matter removing device according to claim 1, further comprising: a flow direction switching means for causing the gas to flow.   A plurality of the removal / regeneration units; and a switching control unit that controls the flow path direction switching unit, wherein the switching control unit includes a part of the plurality of removal / regeneration units. The exhaust gas is allowed to flow to perform the particulate matter removal process, and the active gas is allowed to flow to the other removal / regeneration unit to perform the filter regeneration process. 3. The particulate matter removing apparatus according to claim 2, wherein the flow path direction switching means is controlled so as to alternately perform the particulate matter removing process and the filter regeneration process.   Clogging detection means for detecting clogging of the filter based on the pressure difference between the upstream side and the downstream side of the removal / regeneration unit that performs the particulate matter removal processing, and the switching control means includes the clogging detection means. 4. The particulate matter removing apparatus according to claim 3, wherein the flow path direction switching means is controlled based on the detection result.   At least a part of the gas discharged from the removal / regeneration unit or the filter regeneration unit that performs filter regeneration processing is returned to the inlet of the removal / regeneration unit or the filter regeneration unit that performs filter regeneration processing. The particulate matter removing device according to any one of claims 1 to 4, wherein   2. A nitrogen oxide treatment apparatus for treating nitrogen oxide is disposed on the downstream side of the removal / regeneration unit or the filter unit that performs the particulate matter removal process. The particulate matter removing device according to any one of 1 to 5.   Between the filter unit that performs the particulate matter removal process and the filter regeneration unit, or between the removal / regeneration unit that performs the particulate matter removal process and the removal / regeneration unit that performs the filter regeneration process. The particulate matter according to any one of claims 1 to 6, further comprising heat exchange means for promoting heat regeneration by increasing the temperature of the filter section during regeneration processing. Removal device.   A catalyst for promoting combustion of the trapped particulate matter is disposed on the front side or the rear side of the removal / regeneration unit or the filter unit for performing the particulate matter removal process, or on the filter unit The particulate matter removing apparatus according to any one of claims 1 to 7, wherein the particulate matter removing apparatus is supported.   The removal / regeneration unit that is incorporated in a flow path of exhaust gas discharged from the internal combustion engine and performs filter regeneration processing or a recirculation unit that recirculates the gas discharged from the filter regeneration unit to the internal combustion engine. The particulate matter removing device according to any one of claims 1 to 8.   The said active gas production | generation means consists of an ozone production | generation apparatus which produces | generates the ozone gas as said active gas from the air or oxygen gas as the introduced raw material gas, The any one of Claim 1 thru | or 9 characterized by the above-mentioned. Particulate matter removal equipment.   At least one of an oxygen adsorbent, an oxygen separation membrane, a nitrogen adsorbent, and a nitrogen separation membrane is disposed, and a gas supply device that supplies a gas containing oxygen gas to the ozone generator is provided. The particulate matter removing apparatus according to claim 10.   The particulate matter removing device according to claim 10 or 11, wherein the ozone generating device is a creeping discharge or silent discharge type ozone generating device.   The particulate matter removing apparatus according to any one of claims 1 to 12, wherein the filter unit includes a metal filter and / or a ceramic filter. Particulate matter removal process for capturing particulate matter in the exhaust gas, or capturing and removing it by combustion, and a plasma reaction by the filter part built in the exhaust gas flow path, and promoting the oxidation reaction from the source gas An active gas generating step for generating an active gas to be supplied and supplying the active gas to the filter unit on which the particulate matter is deposited,
The active gas is supplied from the active gas generating unit to the filter unit on which the particulate matter has been deposited, and the filter unit is regenerated by combustion removal using the active gas of the particulate matter deposited on the filter unit. And a particulate matter removing method including a filter regeneration step for the purpose.

Images