WO2018123262A1

WO2018123262A1 - Particulate substance combustion device

Info

Publication number: WO2018123262A1
Application number: PCT/JP2017/039643
Authority: WO
Inventors: 山城　啓輔; 高野　哲美
Original assignee: 富士電機株式会社
Priority date: 2016-12-28
Filing date: 2017-11-01
Publication date: 2018-07-05
Also published as: JP2018109375A; JP6150001B1

Abstract

The present invention provides a particulate substance combustion device provided with: a charging unit which electrically charges a particulate substance in a particulate substance-containing gas; a collecting unit, which is a collecting box that is spaced apart from the charging unit, collects the particulate substance electrically charged by the charging unit, has an opening for the particulate substance to pass therethrough, and has a metallic case; and a combustion unit which is disposed in the collecting unit, and includes a ceramic heater for combusting the particulate substance collected in the collecting unit to supply radiant heat to the particulate substance. By controlling the timing of the operation of the combustion unit according to the operation state of the particulate substance combustion device, the particulate substance collected in the collecting unit is combusted. The charging unit is disposed outside the collecting box.

Description

Particulate matter combustion equipment

The present invention relates to a particulate matter combustion apparatus.

Conventionally, particulate matter (Particulate Matter, hereinafter abbreviated as PM) in exhaust gas has been collected using corona discharge (see, for example, Patent Documents 1 and 2). Further, it is known that PM is burned by energizing a nichrome wire (for example, see Patent Document 3). Furthermore, it is known to heat the corona electrode continuously or periodically in order to remove contaminants with the corona electrode (see, for example, Patent Document 4).
[Prior art documents]
[Patent Literature]
[Patent Document 1] Japanese Patent No. 4931602 [Patent Document 2] Japanese Patent No. 4823027 [Patent Document 3] Japanese Patent No. 6028348 [Patent Document 4] Japanese Patent No. 4714155

Challenges to be solved

∙ When the combustion section that burns particulate matter is always operated, it consumes extra power, which is not desirable from the viewpoint of energy efficiency.

General disclosure

In a first aspect of the present invention, a particulate matter combustion apparatus is provided. The particulate matter combustion apparatus may include a charging unit, a collection unit, and a combustion unit. The charging unit may charge the particulate matter in the particulate matter-containing gas. The collection unit may be provided apart from the charging unit. The collection unit may collect the particulate matter charged by the charging unit. The collection part may be a collection box. The collection box may have an opening through which particulate matter passes. The collection box may have a metal housing. The combustion unit may be provided inside the collection unit. The combustion unit may burn the particulate matter collected in the collection unit. The combustion section may include a ceramic heater. The ceramic heater may supply radiant heat to the particulate matter. The particulate matter collected in the collection unit may be burned by controlling the operation timing of the combustion unit according to the operation state of the particulate matter combustion apparatus. The charging unit may be located outside the collection box.

Further, the particulate matter may be burned according to the weight of the particulate matter collected in the collecting part.

When the volume inside the collection part is Vc [cm ³ ] and the density of the particulate matter is 10 ⁻⁴ [kg / cm ³ ], the weight of the particulate matter collected in the collection part is , if it becomes ^{10 -6} × Vc [kg] or ^{10 -5} × Vc [kg] or less, was collected in the collecting portion the particulate matter may be burned.

The particulate matter combustion apparatus may include a charging unit, a collection unit, and a combustion unit. The charging unit may charge the particulate matter in the particulate matter-containing gas. The collection unit may be provided apart from the charging unit. The collection unit may collect the particulate matter charged by the charging unit. The combustion unit may be provided inside the collection unit. The combustion unit may burn the particulate matter collected in the collection unit. The particulate matter collected in the collection unit may be burned by controlling the operation timing of the combustion unit according to the operation state of the particulate matter combustion apparatus. The combustion unit may include a heating element. The heating element may supply heat to the particulate matter collected in the collection unit. The charging unit may have a discharge electrode. The combustion part may further include a conductive part having the same polarity as the discharge electrode.

The particulate matter combustion apparatus may be provided with a plurality of unit structures. The plurality of unit structures may be arranged in series in the flow direction. The flow direction may be a direction from upstream to downstream of the particulate matter-containing gas. The plurality of unit structures may each include a charging unit, a collection unit, and a combustion unit. The voltage supplied to the charging unit in each of the plurality of unit structures may be controlled according to the wind speed of the particulate matter-containing gas.

The particulate matter combustion apparatus may include a charging unit, a collection unit, and a combustion unit. The charging unit may charge the particulate matter in the particulate matter-containing gas. The collection unit may be provided apart from the charging unit. The collection unit may collect the particulate matter charged by the charging unit. The combustion unit may be provided inside the collection unit. The combustion unit may burn the particulate matter collected in the collection unit. The particulate matter collected in the collection unit may be burned by controlling the operation timing of the combustion unit according to the operation state of the particulate matter combustion apparatus. The particulate matter combustion apparatus may include a plurality of unit structures. The plurality of unit structures may be arranged in series in the flow direction. The flow direction may be a direction from upstream to downstream of the particulate matter-containing gas. The plurality of unit structures may each include a charging unit, a collection unit, and a combustion unit. The power supplied to the combustion section in each of the plurality of unit structures may be controlled according to the wind speed of the particulate matter-containing gas.

The electric power supplied to the combustion section may be controlled according to the temperature of the particulate matter-containing gas. The electric power supplied to the combustion unit may be controlled according to the weight of the particulate matter collected in the collection unit.

The charging unit may have a discharge electrode. The discharge electrode may include a plurality of barbs. The plurality of barbs may be provided at different positions in the flow direction. The flow direction may be a direction from upstream to downstream of the particulate matter-containing gas. The collection part may have an opening. The opening may be provided on a surface facing the discharge electrode. Depending on the position of the plurality of barbs, the opening and the radiating part of the ceramic heater in the combustion part may be arranged.

Note that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

It is sectional drawing of PM combustion apparatus 100 in 1st Embodiment. (A) is a top view of the charging unit 10 and the collection box 20. FIG. 4B is a top view of the combustion unit 30. FIG. 2 is a partially enlarged view of a top view of a combustion unit 30. FIG. It is a 1st modification regarding arrangement | positioning of the ceramic heater 32. FIG. It is a 2nd modification regarding arrangement | positioning of the ceramic heater 32. FIG. (A) is a top view of the combustion part 30 in 2nd Embodiment. (B) is sectional drawing of the collection box 20 and the combustion part 30 in 2nd Embodiment. It is sectional drawing of PM combustion apparatus 100 in 3rd Embodiment. (A) is a top view of the charging unit 10 and the collection box 20. FIG. 4B is a top view of the combustion unit 30. FIG. It is a 1st modification regarding arrangement | positioning of the heating wire 52. FIG. It is a 2nd modification regarding arrangement | positioning of the heating wire 52. FIG. It is sectional drawing of PM combustion apparatus 100 in 4th Embodiment. It is sectional drawing of PM combustion apparatus 100 in 5th Embodiment. It is sectional drawing of PM combustion apparatus 100 in 6th Embodiment. It is sectional drawing of PM combustion apparatus 100 in 7th Embodiment.

Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

FIG. 1 is a cross-sectional view of the PM combustion apparatus 100 according to the first embodiment. The PM combustion device may be read as a particulate matter combustion device. The PM combustion apparatus 100 may collect PM contained in the PM-containing gas 74 and burn the collected PM. The PM-containing gas 74 may pass through the gas passage region 70 in the PM combustion apparatus 100. In this example, the gas passage region 70 is a region between the discharge electrode 12 of the charging unit 10 and the collection box 20 provided away from the charging unit 10 in the Z-axis direction. In addition, the collection box 20 of this example has a metal housing. The collection box 20 is an example of a collection unit.

The PM-containing gas 74 in this example passes through the gas passage region 70 from the Y-axis negative direction toward the positive direction. The negative Y-axis direction is upstream of the PM-containing gas 74, and the positive Y-axis direction is downstream of the PM-containing gas 74. In this specification, the direction from upstream to downstream is also referred to as the flow direction of the PM-containing gas 74.

In FIG. 1, the X axis and the Y axis are orthogonal to each other, and the Z axis is perpendicular to the XY axis plane. The X, Y, and Z axes form a so-called right-handed system. The X, Y and Z axes only specify the relative positions of the components and do not limit the specific direction. The Z-axis direction is not necessarily parallel to the gravity direction. The terms “upper”, “lower”, “upper” and “lower” in this specification are also not limited to the vertical direction in the direction of gravity. These terms only refer to the direction relative to the Z axis.

The PM combustion apparatus 100 of this example has two unit structures 60 provided symmetrically with respect to a plane parallel to the XY plane. One unit structure 60 may include the charging unit 10, the collection box 20, and the combustion unit 30. The unit structure 60 of the present example shares one collection box 20 and one combustion unit 30, but the unit structure 60-1 has an upper half of one collection box 20 and an upper half of one combustion unit 30. And the unit structure 60-2 may be regarded as having a lower half of one collection box 20 and a lower half of one combustion section 30. In another example, the unit structure 60-1 and the unit structure 60-2 may be regarded as one unit structure 60.

The charging unit 10 may include a discharge electrode 12 and a DC power source 24. The charging unit 10-1 in this example includes discharge electrodes 12-1 and 12-2 and a DC power supply 24-1, and the charging unit 10-2 in this example includes discharge electrodes 12-3 and 12-4. And a DC power supply 24-2. In this example, one DC power supply 24 is provided for one charging unit 10, but in another example, one DC power supply 24 is provided in the unit structures 60-1 and 60-2 adjacent in the Z-axis direction. May be provided.

The charging unit 10 of this example includes a pair of discharge electrodes 12. The discharge electrode 12 of this example has a flat plate shape parallel to the XY plane. The pair of discharge electrodes 12 may be arranged in line symmetry with respect to a straight line parallel to the Y axis. Further, the pair of discharge electrodes 12 may be provided apart from each other in the X-axis direction.

The discharge electrode 12 may have a plurality of barbs 14 protruding in the X-axis direction on one side of the end. A plurality of thorn portions 14 may be provided along the Y-axis direction of the discharge electrode 12. That is, the plurality of barbs 14 may be provided at different positions in the flow direction of the PM-containing gas 74. The plurality of barbs 14 may be provided on the sides of the pair of discharge electrodes 12 facing each other. The thorn portion 14 in this example is a vertex portion that protrudes in the X-axis direction among the vertices of one triangle.

A negative voltage may be applied from the DC power supply 24 to the discharge electrode 12. The magnitude of the negative voltage may be minus several kV. Note that k is an SI prefix meaning 10 to the third power, and V means volts. The charging unit 10 causes the gas in the gas passage region 70 to break down by providing a potential difference of several kV to the gas between the metal discharge electrode 12 and the metal collection box 20 having the ground potential. Can do. Thereby, the charging unit 10 can generate discharge plasma (that is, charged particles) between the thorn unit 14 and the collection box 20.

PM-containing gas 74 has a lower oxygen concentration than air and a higher carbon dioxide concentration than air. The PM-containing gas 74 is hotter than room temperature. The PM-containing gas 74 is exhaust gas from an engine, for example, and has a temperature of about 270 ° C. For such low oxygen concentration, high carbon dioxide concentration and high temperature PM-containing gas 74, the operating region (current-voltage characteristic region) capable of stably generating corona discharge is a negative voltage rather than a positive voltage. It ’s wider. In this example, by applying a negative voltage to the discharge electrode 12, corona discharge can be generated more stably than when a positive voltage is applied.

The charged particles may be negative ions such as electrons or positive ions. The discharge plasma may be corona discharge or glow discharge. The PM in the PM-containing gas 74 may be charged by the collision between the generated charged particles and the PM in the PM-containing gas 74. In this example, the charging unit 10 generates corona discharge, and PM is negatively charged.

The charged PM may be drawn to a collection box 20 having a ground potential. Further, the charged PM may ride on an ion wind formed by corona discharge and be drawn to the collection box 20. A certain percentage of the PM in the PM-containing gas 74 may be charged and collected in the collection box 20. PM that is charged but not collected in the collection box 20 may be collected in the collection box 20 located downstream. Further, the uncharged PM may be charged in the downstream charging unit 10.

The collection box 20 may have a plurality of openings 22 on the surface facing the discharge electrode 12. The collection box 20 of this example faces the discharge electrode 12 in the positive and negative directions in the Z-axis direction. The collection box 20 of this example has a plurality of openings 22 on two surfaces (upper surface 21 and lower surface 23) in the positive and negative directions in the Z-axis direction. The collection box 20 of this example has a rectangular parallelepiped shape, and the four surfaces surrounding the two surfaces do not have the opening 22. The collection box 20 of this example has a ground potential.

The charged PM may be collected in the collection box 20 through the opening 22. The charged PM may be collected on the surface of the collection box 20. The collection box 20 can provide a space having a wind speed lower than that of the PM-containing gas 74 inside. For example, when the wind speed of the PM-containing gas 74 is 20 m / s, the wind speed inside the collection box 20 can be 1 m / s. Note that m means meters and s means seconds. By providing the collection box 20, it is possible to reduce the PM collected in the collection box 20 from being scattered on the flow of the PM-containing gas 74. Thereby, PM can be collected stably.

Note that the charging unit 10 may include the upper surface 21 or the lower surface 23 of the collection box 20. In one example, the charging unit 10-1 includes an upper surface 21 and the charging unit 10-2 includes a lower surface 23. In this example, the upper surface 21 of the collection box 20 is a plane portion parallel to the XY plane including the opening 22, and the lower surface 23 of the collection box 20 is a plane parallel to the XY plane including the opening 22. Part.

The combustion unit 30 may be provided inside the collection box 20. The combustion unit 30 may burn the PM collected in the collection box 20. The combustion unit 30 may include a heating element that supplies heat to the PM. By burning PM with the heat from the heating element, the PM is sufficiently low from several V to 100 V compared to dielectric barrier discharge in which PM is burned by discharge using a high voltage of several kV to several tens of kV. Can be burned. Thereby, PM can be burned with a smaller electric power compared to the dielectric barrier discharge. Moreover, since the combusting part 30 of this example uses a sufficiently low voltage as compared with the dielectric barrier discharge, it can be handled more safely.

The heating element in the combustion section 30 of this example is a ceramic heater 32 that supplies radiant heat to the PM. In FIG. 1, a state in which electromagnetic waves and the like are radiated from the ceramic heater 32 to the PM is indicated by broken lines and hatching. The radiant heat may spread radially from the radiant part of the ceramic heater 32. The ceramic heater 32 can directly heat PM by radiant heat. Therefore, in this example, energy efficiency can be increased as compared with the case where PM is heated using a metal plate in which a heating wire is incorporated.

The combustion unit 30 of this example includes a plurality of ceramic heaters 32, a pair of insulating plates 34, and a plurality of pairs of bolts 36 and nuts 38. The plurality of ceramic heaters 32 may have a rectangular parallelepiped shape having a longitudinal portion in the Y-axis direction. The plurality of ceramic heaters 32 may be provided apart from each other at different positions in the X-axis direction. The head 37 is a part of the bolt 36 and may be used when the bolt 36 and the nut 38 are tightened.

The insulating plate 34 may be a high-temperature compatible insulating plate that can ensure electrical insulation of several hundred volts at a high temperature of about 400 ° C. at which PM burns. The insulating plate 34 may be a mica ceramic plate. The insulating plate 34 of this example is a Mycalex (registered trademark) plate.

The pair of insulating plates 34 may be provided so as to overlap in the Z-axis direction with a plurality of ceramic heaters 32 interposed therebetween. Further, the plurality of pairs of bolts 36 and nuts 38 may fix the pair of insulating plates 34. In this example, two pairs of bolts 36 and nuts 38 are provided so as to sandwich one ceramic heater 32 therebetween in the X-axis direction.

The position of the ceramic heater 32 may be fixed by being sandwiched between the insulating plates 34. The ceramic heater 32 may have a radiation part exposed to the inside of the collection box 20 at a portion not sandwiched between the insulating plates 34. The ceramic heater 32 of this example has a radiation portion on the surface in the positive and negative directions of the Z axis. Thereby, the ceramic heater 32 of this example can supply radiant heat in the positive and negative directions of the Z axis.

The combustion unit 30 may be fixed at the approximate center of the collection box 20 in the Z-axis direction. Thereby, in the two adjacent unit structures 60, the distance from the XY plane in which the ceramic heater 32 is provided to the upper surface 21 and the lower surface 23 in which the opening 22 of the collection box 20 is provided can be equalized. Thus, since the ceramic heater 32 of this example has a vertically symmetrical structure, the unit structure 60-1 having the upper half of the combustion part 30 and the function 60-2 having the lower half of the combustion part 30 function similarly. You can do it.

In this example using the ceramic heater 32, the collected PM and the ceramic heater 32 are preferably separated by a predetermined distance. In this example, since the distance from the ceramic heater 32 to the upper surface 21 and the lower surface 23 of the collection box 20 is equalized, one of the adjacent unit structures 60 (that is, one of the unit structures 60-1 and 60-2). , It is possible to prevent the ceramic heater 32 and the collected PM from being extremely close to each other.

By the way, when collecting the collected PM periodically without burning, it is necessary to provide a dust collecting mechanism such as a blower. However, a dust recovery mechanism such as a blower is generally larger than the collection box 20. In one example, the dust collection mechanism such as a blower has a volume about twice that of the collection box 20. In this example, it has the combustion part 30 which burns the collected PM instead of dust collection mechanisms, such as a blower. Thereby, the size of the whole apparatus can be made small compared with the case where the collected PM is not burned. In addition, when using dust collection mechanisms, such as a blower, it is necessary to maintain regularly in order to take out collect | recovered PM. However, in this example, since PM is burned and released to the outside as a gas, it is also advantageous in that maintenance itself is unnecessary.

The PM combustion apparatus 100 of this example further includes a control unit 90. The control unit 90 may include a processor, a CPU or MPU, a memory, and the like, and may control the overall operation of the PM combustion apparatus 100. The control unit 90 may control energization of the heating element of the combustion unit 30. The control unit 90 supplies the radiant heat from the ceramic heater 32 by supplying a current to the ceramic heater 32 (that is, turning on the ceramic heater 32) or not supplying a current (that is, turning off the ceramic heater 32). The presence or absence may be controlled. The control unit 90 may control the amount of radiant heat supplied from the ceramic heater 32 by controlling at least one of a current supplied to the ceramic heater 32 and a voltage applied to the ceramic heater 32.

In addition, in consideration of the legibility of the drawing, in FIG. 1, the control unit 90 is illustrated so as to control one ceramic heater 32. However, the control unit 90 of this example may control all the ceramic heaters 32 in the combustion unit 30.

The control unit 90 may burn the PM collected in the collection box 20 by controlling the operation timing of the combustion unit 30 according to the operation state of the PM combustion apparatus 100. The operation state of the PM combustion apparatus 100 may be a current operation state or a past operation state (that is, an operation history). The operating state of the PM combustion device 100 may be reflected in the weight of the PM collected in the collection box 20. Therefore, the control unit 90 may burn PM according to the weight of the PM collected in the collection box 20. The operation timing may be a timing at which the heating element emits radiant heat or a timing at which energization of the heating element is started.

The collected PM may grow into a lump having a certain size. Agglomerated PM begins to burn at a temperature equal to or higher than a predetermined temperature (for example, 400 ° C.). For example, combustion starts in a region of the PM lump that is closest to the radiating portion of the ceramic heater 32. When combustion starts in the region, the entire mass of PM can be combusted by gradually expanding the combustion.

Thus, in this example, when PM having a constant weight is collected in the collection box 20, the combustion unit 30 is operated to burn the PM. Thereby, compared with the case where the combustion part 30 is always operated, PM can be burned efficiently with lower electric power.

Next, it is examined how much PM should be operated when PM is collected. When the internal volume of the collection box 20 is Vc [cm ³ ] and the density of PM is 10 ⁻⁴ [kg / cm ³ ], if the PM is filled in the collection box 20, The weight is 10 ⁻⁴ × Vc [kg]. For example, when Vc is 100 [cm] × 100 [cm] × 2 [cm], Vc = 2 × 10 ⁴ [cm ³ ], so 10 ⁻⁴ × Vc = 2 [kg]. Note that “x” means a product.

When the same charging unit 10 and collection box 20 as in this example and a dust collection mechanism such as a blower are used, 2 [kg] (2 [kg] / day) of PM per day is collected in the collection box 20. There are collected results. In this case, the PM needed periodic maintenance when 1/5 of the weight of 2 [kg] was collected. Therefore, in this example as well, PM may be burned when PM is collected by (10 ⁻⁴ × Vc) /5=2.0×Vc×10 ⁻⁵ [kg].

The regular maintenance described above was performed for the purpose of stably generating corona discharge. Since PM deposited on the surface of the collection box 20 has the same potential as the collection box 20, the gap length between the thorn portion 14 and the upper surface 21 or the lower surface 23 is substantially shortened. Thereby, the corona discharge generated in the charging unit 10 may become unstable and spark may occur. In particular, when the PM-containing gas 74 is at a high temperature exceeding 100 ° C., sparks are likely to occur when the gap length is shortened. As described above, the timing of burning the above-described PM may be a timing in consideration of generating stable corona discharge.

For example, in the PM combustion apparatus 100, when five collection boxes 20 are provided in the Z-axis direction, if the PM is filled inside the five collection boxes 20, the total PM weight is 2 [ kg] × 5 = 10 [kg]. That is, the weight of the PM combustion apparatus 100 increases by 10 [kg] compared to a state where PM is not collected. In the actual PM combustion apparatus 100, PM does not fill the collection box 20 completely uniformly. Therefore, if the weight increases by 1/10 of 10 [kg], that is, 1 [kg], the collection box 20 PM may protrude from the top.

The length (that is, the thickness) of the collection box 20 in the Z-axis direction and the hole diameter of the opening 22 of the collection box 20 may be related to the collection of PM. Usually, the hole diameter of the opening 22 has a size of 1/10 to 1 of the thickness of the collection box 20. For example, when the thickness of the collection box 20 is 2 [cm], the hole diameter of the opening 22 is 2 [mm] or more and 20 [mm] or less. On the other hand, the thickness of the PM deposited in the collection box 20 is about half of the hole diameter of the opening 22 in order to prevent the PM from being collected once in the collection box 20 but scattered and flowing downstream. It is desirable to do. That is, in the example where the thickness of the collection box 20 is 2 [cm], it is desirable to burn the PM when the thickness of the PM becomes 1 [mm] or more and 10 [mm] or less.

Considering the above, it is desirable that the thickness of the PM to be deposited is not less than (1/20) and not more than (1/2) of the thickness of the collection box 20. The change in PM thickness is proportional to the volume of the collected PM. Also, assuming that the density of PM is constant, the change in PM thickness is proportional to the weight of the collected PM. Therefore, the upper limit and the lower limit of the weight of the collected PM, which is an index of timing for burning PM, may be the following values.
Lower limit: 2.0 × Vc × 10 ⁻⁵ [kg] × (1/20) = Vc × 10 ⁻⁶ [kg]
Upper limit: 2.0 × Vc × 10 ⁻⁵ [kg] × (1/2) = Vc × 10 ⁻⁵ [kg]

In this way, when the weight of PM collected in the collection box 20 becomes 10 ⁻⁶ × Vc [kg] or more and 10 ⁻⁵ × Vc [kg] or less, it is collected in the collection box 20. PM may be burned. Thereby, PM can be combusted with the PM filled in the collection box 20 to some extent while suppressing the collected PM from flowing downstream.

The PM combustion apparatus 100 may have a weight sensor 80 that measures the weight of the collection box 20. The weight sensor 80 may detect the weight of the collection box 20 and inform the control unit 90 of the detected weight. The control unit 90 detects the weight of the increased PM by subtracting the weight of the collection box 20 in a state where no PM is collected from the weight of the collection box 20 in a state where PM is collected. It's okay. The timing for notifying the controller 90 of the increased weight detected by the weight sensor may be every minute or every second. Instead of the weight sensor 80, the volume of PM may be estimated by optical means. As described above, since the density of PM is known, the weight of PM collected by volume measurement may be estimated.

The control unit 90 may control the power supplied to the combustion unit 30 according to the weight of the PM collected in the collection box 20. The control unit 90 of this example performs energization of the ceramic heater 32 when the weight of the collected PM is in the range of 10 ⁻⁶ × Vc [kg] to 10 ⁻⁵ × Vc [kg]. The presence / absence or the current (or voltage applied to the ceramic heater 32) flowing through the ceramic heater 32 is controlled. Thereby, since PM can be combusted when PM is collected only by a fixed weight, extra power consumption in the combustion unit 30 can be reduced.

Further, the control unit 90 may increase the power supplied to the combustion unit 30 when the weight of the PM exceeds a predetermined value. The control unit 90 may include a table of a plurality of numerical ranges obtained by subdividing the above-described range of 10 ⁻⁶ × Vc [kg] to 10 ⁻⁵ × Vc [kg]. When the control unit 90 supplies power to the combustion unit 30, the power supplied to the combustion unit 30 may be higher as the collected PM is in a heavier range. Thereby, the time required for PM to burn can be controlled according to the weight of PM. For example, when the PM is relatively large, the collected PM can be burned quickly by applying a higher power than that provided when the PM is relatively small.

(A) of FIG. 2 is a top view of the charging unit 10 and the collection box 20. As shown in FIG. 2A, the discharge electrode 12 of this example has a plurality of barbs 14 along the flow direction of the PM-containing gas 74. The opening 22 of the collection box 20 may be arranged according to the position of the thorn portion 14. In this example, one opening 22 is disposed below one thorn portion 14.

(B) of FIG. 2 is a top view of the combustion part 30. FIG. However, the state excluding the discharge electrode 12 and the upper surface 21 of the collection box 20 is shown. One end of the ceramic heater 32 is fixed by an insulating plate 34 and a bolt 36. In addition, a radiation portion 33 is provided at the other end of the ceramic heater 32.

In one example, the radiating portion 33 of the ceramic heater 32 may have an area of 4 mm × 4 mm in the XY plane. For example, when the collected PM and the radiation part 33 are separated from each other by 5 mm or more and 10 mm or less, the PM is burned at a burning rate of 40 [mg / min] or more and 50 [mg / min] per ceramic heater 32. be able to.

In one example, 40 ceramic heaters 32 may be provided in one collection box 20. When the PM combustion apparatus 100 has five collection boxes 20 stacked in the Z-axis direction, the PM combustion apparatus 100 is 40 [mg / min] or more and 50 [mg / min] × 200 = 8000 [mg / min] or more. PM can be burned at a burning rate of 10,000 [mg / min].

For example, burning 2 kg of PM requires 2000 [g] / 10 [g / min] = 200 min or more and 2000 [g] / 8 [g / min] = 250 [min] or less. That is, it takes about 3 to 4 hours. However, the above time is a time when the ceramic heater 32 supplies heat in a normal temperature atmosphere.

Normally, the temperature of the PM-containing gas 74 exhausted from the engine or the like is as high as 100 ° C. to 300 ° C. (typically 200 ° C.), so that it is collected even if the ceramic heater 32 supplies heat intermittently. The PM collected in the box 20 can be burned. Moreover, the lump of PM once ignited can be spread. Therefore, in order to burn 2 kg of PM, it is collected by supplying heat from the ceramic heater 32 for a half time of 200 [min] or more and 250 [min] or less, that is, approximately one and a half hours to two hours. The burned PM can be burned.

Therefore, the control unit 90 may control the power supplied to the combustion unit 30 according to the temperature of the PM-containing gas 74. As described above, the temperature of the PM-containing gas 74 is relatively high, and when the PM collected in the collection box reaches about 400 ° C., it starts to burn. Therefore, the control unit 90 increases the power supplied to the combustion unit 30 when the temperature of the PM-containing gas 74 is relatively low, and supplies the power to the combustion unit 30 when the temperature of the PM-containing gas 74 is relatively high. Electric power may be reduced.

Thereby, when the temperature of the PM-containing gas 74 is relatively low, it is possible to prevent a situation where PM does not burn indefinitely. Further, when the temperature of the PM-containing gas 74 is relatively high, excessive consumption of power in the combustion unit 30 can be suppressed by heating the PM too much. Note that the control unit 90 may control the power supplied to the combustion unit 30 in consideration of the time until the PM reaches about 400 [° C.].

The radiation part 33 may also be arranged according to the position of the thorn part 14. In this example, one thorn part 14, one opening part 22, and one radiation part 33 may overlap in the Z-axis direction. Note that one thorn portion 14, one opening portion 22, and one radiation portion 33 may overlap at least partially in the Z-axis direction. PM tends to be collected in the unit structure 60-1 near the thorn portion 14 and in the unit structure 60-2 near the thorn portion 14. Therefore, by arranging the opening 22 and the radiating portion 33 according to the position of the thorn portion 14, the PM can be burned more efficiently than when radiant heat is supplied to a region where PM is difficult to collect. .

FIG. 3 is a partially enlarged view of the top view of the combustion unit 30. In order to facilitate understanding, the insulating plate 34 and the head 37 of the bolt 36 are indicated by broken lines. The ceramic heater 32 has a positive electrode wiring and a negative electrode wiring. In this example, the positive and negative wirings are made as short as possible. Then, the positive wiring of each ceramic heater 32 is connected to the positive heat-resistant coated wiring 44 by the crimp terminal 42. Similarly, the negative electrode wiring of each ceramic heater 32 is connected to the negative electrode heat-resistant coated wiring 45 by the crimp terminal 43. Thereby, the thermal deterioration of the ceramic heater 32 can be reduced, and the operation reliability of the ceramic heater 32 can be ensured.

FIG. 4A is a first modification example regarding the arrangement of the ceramic heater 32. In order to facilitate understanding, the opening 22 of the collection box 20 is omitted, and one side of the discharge electrode 12 where the barbs 14 are provided in the discharge electrode 12 is indicated by a broken line. In this example, the plurality of ceramic heaters 32 are provided apart from each other at different positions in the Y-axis direction. In this example, the plurality of ceramic heaters 32 immediately below the discharge electrode 12-1 and the plurality of ceramic heaters 32 directly below the discharge electrode 12-2 are line symmetric with respect to a straight line parallel to the Y axis. Provided.

Also in this example, the opening 22 and the radiation portion 33 are arranged according to the position of the thorn portion 14. That is, one thorn part 14, one opening part 22, and one radiation part 33 overlap at least partially in the Z-axis direction. Thereby, compared with the case where radiant heat is supplied to the area | region where PM is hard to collect, PM can be burned more efficiently.

FIG. 4B is a second modification example regarding the arrangement of the ceramic heater 32. In order to facilitate understanding, the opening 22 is omitted, and one side of the discharge electrode 12 provided with the barbs 14 is indicated by a broken line. The ceramic heater 32 of this example is provided by extending from one surface facing the Y-axis direction to the other surface in the collection box 20. The ceramic heater 32 of this example is fixed by insulating plates 34 at both ends in the Y-axis direction.

The ceramic heater 32 of this example has a radiating portion 33 in a region not covered with the insulating plate 34. The radiation part 33 of this example is also provided on the upper and lower surfaces of the ceramic heater 32. However, the radiation part 33 of this example is provided to extend between the two insulating plates 34 opposed in the Y-axis direction. The radiation part 33 may extend at least from directly below the thorn part 14 located at the most upstream to directly below the thorn part 14 located at the most downstream. In this example, the plurality of ceramic heaters 32 are provided apart from each other at different positions in the X-axis direction.

Also in this example, the opening 22 and the radiation portion 33 are arranged according to the position of the thorn portion 14. That is, one thorn part 14, one opening part 22, and one radiation part 33 overlap at least partially in the Z-axis direction. Thereby, compared with the case where radiant heat is supplied to the area | region where PM is hard to collect, PM can be burned efficiently.

(A) of FIG. 5 is a top view of the combustion part 30 in 2nd Embodiment. FIG. 5B is a cross-sectional view of the collection box 20 and the combustion unit 30 in the second embodiment. The combustion part 30 of this example further includes a conductive part 35 having the same polarity as that of the discharge electrode 12. This is the main difference from the first embodiment. The conductive portion 35 may be provided between two ceramic heaters 32 adjacent in the X-axis direction. As with the ceramic heater 32, one end of the conductive portion 35 may be fixed on the insulating plate 34, and the other end may protrude in the Y-axis direction and be exposed from the insulating plate 34.

The conductive portion 35 may be a metal conductor. The entire conductive portion 35 may be formed of metal, and a metal foil may be provided only on the surface of the conductive portion 35. A voltage having the same polarity as that of the discharge electrode 12 of the charging unit 10 may be applied to the conductive unit 35 of this example. For example, a negative voltage of several tens of volts is applied to the conductive portion 35. The negatively charged PM can repel the conductive portion 35 to which a negative voltage is applied. Therefore, the PM easily adheres to the surface (content surface and outer surface) of the collection box 20 as compared to the XY plane on which the ceramic heater 32 and the conductive portion 35 are provided. Thereby, PM can be collected at a position separated from the ceramic heater 32.

FIG. 6 is a cross-sectional view of the PM combustion apparatus 100 according to the third embodiment. The combustion unit 30 of this example includes a heating wire 52 instead of the ceramic heater 32. This is the main difference from the first embodiment. By using the heating wire 52, the manufacturing cost of the combustion unit 30 can be reduced compared to the ceramic heater 32. The heating wire 52 may be a continuous nichrome wire. However, in FIG. 6, the several cross section of the heating wire 52 is shown spaced apart. Similarly to the first embodiment, also in this example, the control unit 90 may burn PM by controlling the operation timing of the combustion unit 30 according to the operation state of the PM combustion device 100.

Also in this example, the control unit 90 causes the heating wire 52 to flow current (turn on the heating wire 52) or not flow current (turn off the heating wire 52) to the heating wire 52. The presence or absence of the supply of heat from may be controlled. The control unit 90 may control the amount of heat supplied from the heating wire 52 by controlling at least one of the current supplied to the heating wire 52 and the voltage applied to the heating wire 52.

(A) of FIG. 7 is a top view of the charging unit 10 and the collection box 20. The opening 22 in this example may also be arranged according to the position of the thorn portion 14. FIG. 7B is a top view of the combustion unit 30. However, the state excluding the discharge electrode 12 and the upper surface 21 of the collection box 20 is shown. The heating wire 52 of this example is provided in a meandering shape from one end of the collection box 20 in the X-axis direction to the other end. That is, the heating wire 52 of the present example has a structure in which a U shape and an upside down U shape in the X axis direction are alternately connected in the X axis direction.

One longitudinal portion of the U shape may be arranged according to the position of the thorn portion 14. In the present example, the plurality of barbs 14, the plurality of openings 22, and one U-shaped long portion of the heating wire 52 may overlap in the Z-axis direction. Thereby, compared with the case where one longitudinal part of U shape does not overlap with a plurality of thorn parts 14 and a plurality of openings 22, PM can be burned efficiently.

FIG. 8A is a first modification example regarding the arrangement of the heating wires 52. In order to facilitate understanding, the opening 22 of the collection box 20 is omitted, and one side of the discharge electrode 12 where the barbs 14 are provided is indicated by a broken line. The heating wire 52 of this example has a shape corresponding to the shape of one side of the discharge electrode 12 provided with the thorn portion 14. In this example, one side where the thorn portion 14 is provided has a triangular wave shape extending in the Y-axis direction. The triangular wave shape has irregularities in the X-axis direction. On the other hand, the heating wire 52 has a sinusoidal shape 56 extending in the Y-axis direction. The sine wave shape 56 has irregularities in the X-axis direction. Therefore, the side where the thorn portion 14 is provided and the sine wave shape 56 of the heating wire 52 can substantially overlap in the Z-axis direction.

The heating wire 52 of this example has two sinusoidal shapes 56 and three linear shapes 54. The linear shape 54-1 extends in the X-axis direction. In this example, one end of the sine wave shape 56-1 in the positive direction of the Y axis is connected to the linear shape 54-1. Also, one end of the sine wave shape 56-1 in the negative Y-axis direction is connected to the linear shape 54-2. Similarly, one end of the sine wave shape 56-2 in the positive Y-axis direction is connected to the linear shape 54-3, and one end of the sine wave shape 56-2 in the negative Y-axis direction is connected to the linear shape 54-2.

FIG. 8B is a second modification example regarding the arrangement of the heating wires 52. The combustion part 30 of this example has the heating wire 52-1 and the heating wire 52-2 which were mutually separated. In this example, the sine wave shape 56-1 of the heating wire 52-1 and the sine wave shape 56-2 of the heating wire 52-2 are separated from each other. Further, a linear shape 54-1 and a linear shape 54-2 are provided at both ends of the sine wave shape 56-1 in the Y-axis direction, and a linear shape 54-3 is provided at both ends of the sine wave shape 56-2 in the Y-axis direction. And a linear shape 54-4 is provided. This point is different from the third embodiment and the first modification thereof.

FIG. 9 is a cross-sectional view of the PM combustion apparatus 100 in the fourth embodiment. In FIG. 9 and subsequent figures, it should be noted that the viewpoint is changed not to the direction parallel to the Y-axis direction as shown in FIG. 1 but to the direction parallel to the X-axis direction. In this example, the charging unit 10 is provided on the upstream side of the PM-containing gas 74, and the collection box 20 and the combustion unit 30 are provided on the downstream side of the PM-containing gas 74. In this example, the charging unit 10, the collection box 20, and the combustion unit 30 do not overlap in the Z-axis direction. This example is different from the first embodiment in that respect, but is the same as the first embodiment in other points. Moreover, although this example is described based on the first embodiment, it is needless to say that it may be combined with the modification of the first embodiment, the second embodiment, and the third embodiment and its modification. is there.

FIG. 10 is a cross-sectional view of the PM combustion apparatus 100 in the fifth embodiment. The PM combustion apparatus 100 of this example has 2n unit structures 60 provided so as to overlap in the Z-axis direction (n is a natural number of 2 or more). The arrangement of the unit structures 60 in this example may be expressed as a plurality of unit structures 60 arranged in parallel. By arranging a plurality of unit structures 60 in parallel, more PM-containing gas can be processed per unit time than when one unit structure 60 is provided. Although this example is described on the basis of the first embodiment, it may be combined with the modification of the first embodiment, the second embodiment, the third embodiment and its modification, and the fourth embodiment. Of course.

FIG. 11 is a cross-sectional view of the PM combustion apparatus 100 in the sixth embodiment. The PM combustion apparatus 100 of this example includes a plurality of unit structures 60 arranged in series in the flow direction from the upstream to the downstream of the PM-containing gas 74. In this example, two unit structures 60-1 and 60-2 arranged in parallel are arranged in series in the flow direction (where m is a natural number of 2 or more). In this example, one DC power supply 24-1 applies a negative voltage to m charging units 10 located in the Z-axis positive direction and arranged in series, and another DC power supply 24- 2 applies a negative voltage to m charging units 10 positioned in the Z-axis negative direction and arranged in series.

However, in another example, one DC power supply 24 may be applied to 2 m charging units 10 arranged in series in the positive Z-axis direction and the negative Z-axis direction. The 2m charging units 10 may include different DC power sources 24, and each of the two unit structures 60 at the same position in the flow direction (Y-axis direction) may share one DC power source 24. . In addition, although this example is described on the basis of 1st Embodiment, the modification of 1st Embodiment, 2nd Embodiment, 3rd Embodiment, its modification, 4th Embodiment, and 5th Of course, it may be combined with the embodiment. For example, when combining this example and the fifth embodiment, the PM combustion apparatus 100 includes m unit structures 60 arranged in series in the flow direction (Y-axis direction), and in the Z-axis direction. It has n unit structures 60 arranged in parallel. That is, in this case, the PM combustion apparatus 100 has m × n unit structures 60.

In this example, since the voltage of each charging unit 10 is the same, the PM collected in the collection box 20-1 located at the most upstream is relatively small, and the collection is performed in the collection box 20 as going downstream. PM may increase. Therefore, the control unit 90 may control the power supplied to the combustion unit 30 in each of the plurality of unit structures 60.

The control unit 90 of the present example supplies lower power to the upstream combustion unit 30 in which the collected PM has a relatively small weight, and the downstream combustion unit 30 in which the collected PM has a relatively large weight. Supply large power. As a result, excess power consumption can be suppressed in the upstream where the weight of the collected PM is relatively small, and PM is sufficiently burned in the downstream where the weight of the collected PM is relatively large. be able to.

Further, the electric power supplied to the combustion unit 30 may be controlled according to the wind speed of the PM-containing gas 74. For example, since the PM collected in the collection box 20 is more likely to be scattered downstream as the wind speed increases, the collected weight tends to decrease. Therefore, the control unit 90 may increase the power supplied to the combustion unit 30 as the wind speed of the PM-containing gas 74 increases, and decrease the power supplied to the combustion unit 30 as the wind speed of the PM-containing gas 74 decreases. Thereby, suppression of excess power consumption and sufficient combustion of PM can be further ensured.

FIG. 12 is a cross-sectional view of the PM combustion apparatus 100 in the seventh embodiment. Similar to the sixth embodiment, the PM combustion apparatus 100 of the present example also includes a plurality of unit structures 60 arranged in series in the flow direction from the upstream to the downstream of the PM-containing gas 74. However, in this example, each unit structure 60 has one variable DC power supply 26. The controller 90 may control the output voltage of each variable DC power supply 26. A control signal from the control unit 90 to the variable DC power supply 26 is indicated by a broken line.

The PM-containing gas 74 sequentially passes from the upstream gas passage region 70 to the downstream gas passage region 70. If the same voltage is applied to the charging parts 10 of all the unit structures 60, the amount of PM collected in the most upstream collection box 20-1 is relatively small, and the collection boxes go downstream. There is a possibility that PM collected by 20 increases. For example, the weight of the collected PM may have a maximum value in the middle collection box 20. Therefore, the control unit 90 may control the voltage supplied to the charging unit 10 in each of the plurality of unit structures 60. Thereby, regardless of the wind speed of the PM-containing gas 74 and the position of the unit structure 60 in the flow direction of the PM-containing gas 74, the weight of the PM collected in each collection box 20 can be leveled. In this case, the control unit 90 may supply the same power to each combustion unit 30. In another example, one variable DC power supply 26 is shared by two unit structures 60 stacked in the Z-axis direction, and the control unit 90 controls the voltage of the one shared variable DC power supply 26. May be.

Note that, similarly to the sixth embodiment, the power supplied to the combustion unit 30 may be controlled according to the wind speed of the PM-containing gas 74. For example, the control unit 90 may increase the power supplied to the combustion unit 30 as the wind speed of the PM-containing gas 74 increases, and decrease the power supplied to the combustion unit 30 as the wind speed of the PM-containing gas 74 decreases. Thereby, suppression of excess power consumption and sufficient combustion of PM can be further ensured. In addition, although this example is described on the basis of 1st Embodiment, the modification of 1st Embodiment, 2nd Embodiment, 3rd Embodiment, its modification, 4th Embodiment, and 5th Of course, it may be combined with the embodiment.

As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

The execution order of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior”. It should be noted that they can be implemented in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for the sake of convenience, this means that it is essential to carry out in this order. is not.
In addition, according to embodiment described in this-application specification, the following structures are also disclosed.
[Item 1]
A particulate matter combustion apparatus,
A charging unit for charging the particulate matter in the particulate matter-containing gas;
A collecting unit that is provided apart from the charging unit and collects the particulate matter charged by the charging unit;
A combustion unit that is provided inside the collection unit and burns the particulate matter collected in the collection unit;
With
Combusting the particulate matter collected in the collection unit by controlling the operation timing of the combustion unit according to the operation state of the particulate matter combustion device,
Particulate matter combustion equipment.
[Item 2]
Combusting the particulate matter according to the weight of the particulate matter collected in the collection part,
Item 1. The particulate matter combustion apparatus according to Item 1.
[Item 3]
When the internal volume of the collection part is Vc [cm ³ ] and the density of the particulate matter is 10 ⁻⁴ [kg / cm ³ ],
When the weight of the particulate matter collected in the collection unit was 10 ⁻⁶ × Vc [kg] or more and 10 ⁻⁵ × Vc [kg] or less, it was collected in the collection unit. Burning the particulate matter;
Item 3. The particulate matter combustion apparatus according to Item 2.
[Item 4]
The combustion section includes a heating element that supplies heat to the particulate matter collected in the collection section.
Item 4. The particulate matter combustion apparatus according to any one of Items 1 to 3.
[Item 5]
The heating element is a ceramic heater that supplies radiant heat to the particulate matter.
Item 4. The particulate matter combustion apparatus according to Item 4.
[Item 6]
The charging unit has a discharge electrode,
The combustion part further includes a conductive part having a potential of the same polarity as the discharge electrode.
Item 4. The particulate matter combustion apparatus according to Item 4 or 5.
[Item 7]
A plurality of unit structures each having the charging unit, the collection unit, and the combustion unit, arranged in series in the flow direction from the upstream to the downstream of the particulate matter-containing gas,
According to the wind speed of the particulate matter-containing gas, the voltage supplied to the charging unit in each of the plurality of unit structures is controlled.
The particulate matter combustion apparatus according to any one of items 1 to 6.
[Item 8]
A plurality of unit structures each having the charging unit, the collection unit, and the combustion unit, arranged in series in the flow direction from the upstream to the downstream of the particulate matter-containing gas,
Controlling the power supplied to the combustion section in each of the plurality of unit structures according to the wind speed of the particulate matter-containing gas,
The particulate matter combustion apparatus according to any one of items 1 to 6.
[Item 9]
According to the temperature of the particulate matter-containing gas, the power supplied to the combustion unit is controlled.
The particulate matter combustion apparatus according to any one of items 1 to 8.
[Item 10]
According to the weight of the particulate matter collected in the collection unit, the power supplied to the combustion unit is controlled.
Item 10. The particulate matter combustion apparatus according to any one of Items 1 to 9.
[Item 11]
The charging unit has a discharge electrode,
The discharge electrode includes a plurality of barbs provided at different positions in the flow direction from the upstream to the downstream of the particulate matter-containing gas,
The collection part has an opening on the surface facing the discharge electrode,
Depending on the position of the plurality of barbs, the opening and the radiating part of the ceramic heater in the combustion part are arranged.
The particulate matter combustion apparatus according to any one of items 1 to 10.

10 .... Charging part, 12 .... Discharge electrode, 14 .... Thorn part, 20 .... Collecting box, 21..Top face, 22..Opening part, 23..Bottom face, 24..DC power supply, 26 ..・ Variable DC power supply, 30 ・・ Burning part, 32 ・・ Ceramic heater, 33 ・・ Radiation part, 34 ・・ Insulating plate, 35 ・・ Conducting part, 36 ・・ Bolt, 37 ・・ Head, 38 ・・ Nut, 42, 43 ... Crimp terminal, 44, 45 ... Heat-resistant coated wiring, 52 ... Heating wire, 54 ... Linear shape, 56 ... Sinusoidal shape, 60 ... Unit structure, 70 ... Gas passage area, 74 ..PM containing gas, 80..weight sensor, 90..control unit, 100..PM combustion apparatus

Claims

A particulate matter combustion apparatus,
A charging unit for charging the particulate matter in the particulate matter-containing gas;
A collection box provided apart from the charging unit, collecting the particulate matter charged by the charging unit, and having an opening for allowing the particulate matter to pass therethrough and having a metal casing. There is a collection part,
A combustion unit that is provided inside the collection unit, includes a ceramic heater that burns the particulate matter collected in the collection unit and supplies radiant heat to the particulate matter;
By controlling the operation timing of the combustion unit according to the operating state of the particulate matter combustion device, the particulate matter collected in the collection unit is burned,
The charging unit is a particulate matter combustion apparatus located outside the collection box.
The particulate matter combustion apparatus according to claim 1, wherein the particulate matter is combusted according to the weight of the particulate matter collected by the collection unit.
When the internal volume of the collection part is Vc [cm 3 ] and the density of the particulate matter is 10 −4 [kg / cm 3 ],
When the weight of the particulate matter collected in the collection unit was 10 −6 × Vc [kg] or more and 10 −5 × Vc [kg] or less, it was collected in the collection unit. The particulate matter combustion apparatus according to claim 2, wherein the particulate matter is combusted.
A particulate matter combustion apparatus,
A charging unit for charging the particulate matter in the particulate matter-containing gas;
A collecting unit that is provided apart from the charging unit and collects the particulate matter charged by the charging unit;
A combustion section provided inside the collection section and combusting the particulate matter collected in the collection section;
By controlling the operation timing of the combustion unit according to the operating state of the particulate matter combustion device, the particulate matter collected in the collection unit is burned,
The combustion section includes a heating element that supplies heat to the particulate matter collected in the collection section,
The charging unit has a discharge electrode,
The particulate matter combustion apparatus, wherein the combustion part further includes a conductive part having a potential of the same polarity as the discharge electrode.
A plurality of unit structures each having the charging unit, the collection unit, and the combustion unit, arranged in series in the flow direction from the upstream to the downstream of the particulate matter-containing gas,
The particulate matter combustion apparatus according to any one of claims 1 to 4, wherein a voltage supplied to the charging unit in each of the plurality of unit structures is controlled according to a wind speed of the particulate matter-containing gas.
A particulate matter combustion apparatus,
A charging unit for charging the particulate matter in the particulate matter-containing gas;
A collecting unit that is provided apart from the charging unit and collects the particulate matter charged by the charging unit;
A combustion section provided inside the collection section and combusting the particulate matter collected in the collection section;
By controlling the operation timing of the combustion unit according to the operating state of the particulate matter combustion device, the particulate matter collected in the collection unit is burned,
A plurality of unit structures each having the charging unit, the collection unit, and the combustion unit, arranged in series in the flow direction from the upstream to the downstream of the particulate matter-containing gas,
The particulate matter combustion apparatus which controls the electric power supplied to the combustion part in each of the plurality of unit structures according to the wind speed of the particulate matter-containing gas.
The particulate matter combustion apparatus according to any one of claims 1 to 6, wherein electric power supplied to the combustion unit is controlled according to a temperature of the particulate matter-containing gas.
The particulate matter combustion apparatus according to any one of claims 1 to 7, wherein electric power supplied to the combustion unit is controlled according to a weight of the particulate matter collected by the collection unit.
The charging unit has a discharge electrode,
The discharge electrode includes a plurality of barbs provided at different positions in the flow direction from the upstream to the downstream of the particulate matter-containing gas,
The collection part has an opening on the surface facing the discharge electrode,
The particulate matter combustion apparatus according to any one of claims 1 to 8, wherein the opening and a radiating portion of a ceramic heater in the combustion portion are arranged according to the positions of the plurality of thorn portions.