JP6998222B2 - Filter test equipment and its usage - Google Patents

Description

The present invention relates to a filter test apparatus. The present invention also relates to a method of using a filter test apparatus.

Exhaust gas emitted from automobiles equipped with internal combustion engines such as gasoline engines and diesel engines includes soot (PM: Particulate Meter) whose main component is carbon and unburned components (Ca, P, Mg) derived from engine oil. Etc.) as the main component of ash. Since soot and ash cause environmental pollution, conventionally, the exhaust gas lines of these internal combustion engines are equipped with filters such as GPF and DPF that collect soot and ash.

Soot and ash collected on the filter cause an increase in the pressure loss of the filter and deterioration of the collection function. Therefore, it is important in the performance evaluation and research and development of the filter to grasp the change in the performance of the filter over time when soot and ash are deposited on the filter.

Conventionally, in order to examine the influence of the accumulation of soot and ash, the filter has been tested by running a gasoline vehicle or a diesel vehicle equipped with a filter or running an engine for a long period of time. However, since the ash deposition rate in the actual vehicle is very slow, it takes a long time of more than half a year to deposit the ash, and the cost required for the test is also large.

Therefore, a device for efficiently performing a test in a short time by supplying a gas simulating the exhaust gas discharged from an actual automobile has been conventionally proposed.

For example, in Japanese Patent Application Laid-Open No. 2012-189454 (Patent Document 1), a large amount of particulate matter having a combustion temperature equivalent to that of the particulate matter discharged from a diesel engine can be generated, and up to a predetermined pressure loss. A device that is not only a particulate matter generator with a small variation in PM deposition amount but also a high heat gas generator for filter regeneration has been proposed. Specifically, it is a combustion chamber that internally burns a gaseous fuel to generate a gaseous substance-containing gas or a high heat gas for filter regeneration, and has an air inlet that supplies combustion air to the combustion chamber and the combustion chamber. A combustion chamber provided with a gas outlet for discharging the particulate substance-containing gas or high-heat gas for filter regeneration generated in the above, and a main burner inserted into the combustion chamber to continuously supply gaseous fuel to the combustion chamber. , And a particulate matter-containing gas or high heat gas generator for filter regeneration equipped with a pilot burner attached to the combustion chamber and igniting a mixed gas of gaseous fuel and combustion air supplied to the combustion chamber. There is.

Japanese Patent Application Laid-Open No. 2016-188633 (Patent Document 2) provides a measuring device capable of quickly and easily measuring the collection efficiency of a solid component (PM or ash) of a DPF without using an engine or a burner device. Proposed. Specifically, an air supply device that sends air to the diesel particulate filter, and an exhaust device that draws the air sent from the air supply device to the diesel particulate filter from the diesel particulate filter and discharges it to the outside. In the air sent from the air supply device to the diesel particulate filter, particulate simulated solid components simulating the solid components contained in the exhaust gas discharged from the diesel engine are intermittently supplied at regular intervals. A measuring device for measuring the solid component collection efficiency of a diesel particulate filter equipped with a simulated solid component supply device is described. Further, Patent Document 2 also describes that carbon black (artificial soot) simulating particulate matter and nonflammable particles simulating ash are used as simulated solid components.

We also know how to increase the amount of ash added to the oil or inject oil into the flame to increase the amount of ash generated when the oil is burned, and accelerate the accumulation of ash on the filter. (Non-Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-189454 Japanese Unexamined Patent Publication No. 2016-188633

Fabian Sonntag, Peter Eilts, “Evaluation of Accelerated Ash Loading Procedures for Diesel Particulate Filters”, SAE International, 2016-01-0939, 04/05/2016

The device described in Patent Document 1 focuses on the generation of soot and does not have in mind the generation of ash.

According to Patent Document 2, since the simulated solid component is mixed with air and the filter test is performed, the test can be performed safely without using an engine or a burner device, but in an actual vehicle, a high temperature gas of several hundred degrees Celsius is used. Since it passes through the filter, there is a large deviation from the conditions when using the actual vehicle. Further, the artificial soot used as a simulated solid component generally has a combustion temperature of about 290 to 520 ° C., and is shifted to a lower temperature side than the combustion temperature of soot produced in an actual vehicle. Therefore, when the simulated solid component is deposited on the filter by the method described in Patent Document 2 and the pressure loss of the filter is measured under high temperature conditions as in an actual vehicle, most of the artificial soot burns and the high temperature conditions are met. It is not possible to analyze the behavior of the pressure loss of the filter below under conditions close to those of the actual vehicle.

In Non-Patent Document 1, since the amount of ash generated is controlled by the combustion of oil, it is difficult to control the amount of ash generated. In addition, there is a limit to the amount of ash generated, and it is desired that an accelerated test can be performed more quickly. Further, in an actual vehicle, soot and ash are deposited together as an exhaust gas component on a filter in a mixed state, but in Non-Patent Document 1, the emphasis is on accelerating and depositing ash. There is a lack of consideration.

The present invention has been made in view of the above matters, and it is possible to simulate a situation in which soot and ash are mixed together and deposited on a filter under conditions similar to those of an actual vehicle in a short time. One of the issues is to provide a filter test device. Another object of the present invention is to provide a method of using such a filter test apparatus.

As a result of diligent studies to solve the above problems, the present inventor has found that it is effective to generate soot in the burner and to supply nonflammable particles simulating ash into the combustion gas from the burner from the feeder. , The present invention has been completed.

In one aspect, the present invention
Combustion section with combustion air inlet, soot generation main burner, pilot burner, and combustion gas generation space,
A feeder that can supply nonflammable particles that imitate ash,
A device for air transporting non-combustible particles supplied from the feeder,
An air inlet accompanied by non-combustible particles from the air transport device provided in the flow path of the combustion gas generated in the combustion unit, and the combustion gas and the air are mixed to generate a mixed gas. A mixing section with a mixing space for
A space for installing a filter for collecting soot and nonflammable particles in the mixed gas provided in the flow path of the mixed gas generated in the mixing section, and an outlet for purified gas from the filter are provided. Filter installation part and
It is a filter test apparatus provided with.

In one embodiment of the filter test apparatus according to the present invention, the combustion unit includes a main burner for generating high heat gas for filter regeneration.

In another embodiment of the filter test apparatus according to the present invention, the feeder is configured to be capable of quantitatively supplying nonflammable particles.

In still another embodiment of the filter test apparatus according to the present invention, the nonflammable particles simulating ash are compounds containing one or more elements selected from the group consisting of Ca, P, Zn, Mg and S. include.

In yet another embodiment of the filter test apparatus according to the present invention, the filter test apparatus comprises a pressure measuring instrument for measuring the pressure loss between the inlet side and the outlet side of the filter.

In still another embodiment of the filter test device according to the present invention, the filter test device includes a flow rate control device for combustion air supplied to the combustion unit.

In still another embodiment of the filter test device according to the present invention, the filter test device includes a flow rate control device for fuel supplied to the main burner for soot generation.

In still another embodiment of the filter test apparatus according to the present invention,
The device for air transport is equipped with a pipe for transporting non-combustible particles supplied from the feeder and a pipe for transporting air.
The pipe for transporting the nonflammable particles is connected to a venturi portion provided in the middle of the pipe for transporting air.
The pipe for transporting air is connected to the air inlet accompanied by the nonflammable particles in the mixing portion on the downstream side of the venturi portion.

In yet another embodiment of the filter test apparatus according to the present invention, the mixing section includes an inlet for cooling air.

In another aspect, the present invention includes installing a filter in a filter installation portion, operating a filter test device to generate a mixed gas, and collecting soot and nonflammable particles in the mixed gas with the filter. It is a method of using the filter test apparatus which concerns on this invention.

In one embodiment of the method of using the filter test apparatus according to the present invention, the flow rate of combustion air and the generation of soot so that the amount of soot generated in the combustion portion is 0.02 g / min or more per 1 L of the volume of the filter. It includes controlling the flow rate of the fuel supplied to the main burner and controlling the supply amount of the nonflammable particles from the feeder so as to be 0.05 g / min or more per 1 L of the volume of the filter.

In another embodiment of the method of using the filter test apparatus according to the present invention, the ratio of the amount of nonflammable particles supplied from the feeder (g / min) to the amount of soot generated in the combustion part (g / min) is determined. It includes controlling in the range of 0.5-40.

Yet another embodiment of the method of using the filter test apparatus according to the present invention includes controlling the temperature of the mixed gas at the inlet of the filter in the range of 100 to 1100 ° C.

In still another embodiment of the method of using the filter test apparatus according to the present invention, the combustion unit is provided with a main burner for generating high heat gas for filter regeneration, and the high heat for filter regeneration is provided with the feeder operation stopped. It involves generating hot gas for filter regeneration using a main burner for gas generation and burning the soot collected in the filter.

According to one embodiment of the present invention, a filter test device capable of simulating a situation in which soot and ash are mixed together and deposited on a filter under conditions more similar to those of an actual vehicle in a short time. Is provided.
According to one embodiment of the present invention, the pressure loss when soot and ash, which are important as filter characteristics, are deposited at the same time can be measured under conditions similar to those of an actual vehicle (for example, a temperature of 500 ° C. or higher).
According to one embodiment of the present invention, the amount of soot generated in the burner and the amount of non-combustible particles supplied from the feeder can be controlled independently, so that the ratio of soot and ash contained in the combustion gas can be arbitrarily set. Therefore, it is possible to easily achieve the state of soot and ash deposited on the filter, which is similar to that of an actual vehicle.

It is a schematic side view of the filter test apparatus which concerns on one Embodiment of this invention. It is a schematic side view of the combustion part of the filter test apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows typically the structural example of the feeder which can supply nonflammable particles simulating ash. It is a schematic side view which shows the structural example of the apparatus for air transporting nonflammable particles supplied from a feeder. It is a perspective view which shows an example of a DPF schematically. It is a schematic cross-sectional view when observing an example of a DPF from the direction orthogonal to the extending direction of a cell.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The present invention is not limited to the following embodiments, and the following embodiments are appropriately modified or improved based on the ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that those skilled in the art also fall within the scope of the present invention.

(1. Test equipment)
FIG. 1 shows a schematic side view of the filter test apparatus according to the embodiment of the present invention.
The filter test apparatus 100 according to the present embodiment is
A combustion unit 110 having a combustion air inlet 112, a soot generation main burner 114, a pilot burner 116, and a combustion gas generation space 115.
A feeder 120 that can supply nonflammable particles that imitate ash,
A device 130 for air transporting nonflammable particles supplied from the feeder 120, and
An inlet 142 of air accompanied by non-combustible particles from the device 130 for air transportation provided in the flow path of the combustion gas generated by the combustion unit 110, and the combustion gas and the air are mixed and mixed. A mixing section 140 provided with a mixing space 144 for producing gas, and
The space 154 for installing the filter 152 for collecting soot and nonflammable particles in the mixed gas provided in the flow path of the mixed gas generated in the mixing unit 140, and the purified gas from the filter 152. Filter installation unit 150 with outlet 156 and
Equipped with.

(1.1 Combustion part)
In one embodiment, the combustion unit 110 includes an inlet 112 for combustion air, a main burner 114 for soot generation, a pilot burner 116, and a combustion gas generation space 115. Examples of the material of the wall for partitioning the combustion portion 110 include, but are not limited to, stainless steel, nickel alloy, and the like. Fuel is supplied to the soot generation main burner 114, and combustion air is supplied into the combustion unit 110 from the combustion air inlet 112. Fuel and air can be supplied to the pilot burner 116. In the combustion gas generation space 115, the fuel supplied to the soot generation main burner 114 is burned to generate combustion gas. The combustion gas can contain soot.

The pilot burner 116 is mainly used for the purpose of igniting the soot generation main burner 114. The operation of the pilot burner may be stopped after the soot generation main burner 114 is ignited, but the operation of the pilot burner may be continued even after the soot generation main burner is ignited. When the operation of the pilot burner is stopped after the soot generation main burner 114 is ignited, the pilot burner 116 is extinguished 10 seconds or more after the soot generation main burner 114 is ignited, for example, 10 to 20 seconds later. Is preferable. As a result, soot can be efficiently generated in a stable combustion state. If the pilot burner 116 is extinguished before 10 seconds or more have elapsed, the soot generation main burner 114 may be extinguished thereafter.

In one embodiment, the combustion unit 110 can have a tubular shape as a whole, and can typically have a cylindrical shape. An inlet 112 for combustion air can be provided at one end of the tubular combustion unit, and an outlet 113 for combustion gas generated in the tubular combustion unit 110 can be provided at the other end of the tubular combustion unit. When the combustion portion has a cylindrical shape (typically a cylindrical shape), it is preferable that both ends are tapered in diameter as shown in FIG. By reducing the diameter of both ends in a tapered shape, the flow of combustion air and combustion gas becomes smooth, the amount of soot generated can be increased, and pressure loss can be suppressed to a low level. Further, as shown in FIG. 1, a flange portion (flange portion) 119 is formed at the inlet 112 of the combustion air and the outlet 113 of the combustion gas for joining with other members or pipes. preferable.

The size of the combustion unit 110 is not particularly limited, but it is preferable that the size is such that the fuel can be burned by the combustion air and soot suitable for performing the filter test in a short time can be generated. For example, when viewed from the general size range of GPF and DPF, the combustion part is cylindrical, the flow rate of combustion air is 0.04 Nm ³ / min to 0.25 Nm ³ / min, and the amount of soot generated. When the (concentration) is required to be 0.25 to 0.75 g / Nm ³ , the inner diameter (diameter) of the combustion portion is preferably 130 to 250 mm, more preferably 150 to 200 mm. The volume of the combustion portion is preferably 6,000 to 35,000 cm ³ , more preferably 6,000 to 30,000 cm ³ . If the inner diameter of the combustion portion is smaller than 130 mm, the amount of soot produced may be small. Further, if the inner diameter of the combustion portion is larger than 250 mm, the minimum flow rate for flowing combustion air in the combustion portion with a uniform distribution may be limited. If the volume of the combustion part is smaller than 6,000 cm ³ , the wall of the combustion part becomes hot, and the combustion part may be oxidatively deteriorated or heat shielding to the surroundings may be required. Further, if the volume of the combustion portion is larger than 35,000 cm ³ , the filter test device becomes large, so that the manufacturing cost and the operation cost of the test device become large, and it may be necessary to increase the installation space.

(1.2 Main burner for soot generation)
The soot generation main burner 114 can generate soot-containing combustion gas. The shape of the soot generation main burner 114 is not particularly limited, but may be, for example, tubular, and typically cylindrical.

The content of soot in the combustion gas can be controlled, for example, by adjusting the flow rate of the combustion air supplied to the combustion unit 110 and the flow rate of the fuel supplied to the soot generation main burner 114. Therefore, in one embodiment of the present invention, the filter test device 100 can include a flow rate control device 103 for combustion air supplied to the combustion unit 110. Further, in one embodiment of the present invention, the filter test device can include a flow rate control device 106 for fuel supplied to the soot generation main burner 114. The combustion air flow rate control device 103 or the fuel flow rate control device 106 is not particularly limited as long as the respective purposes of controlling the flow rate of air or fuel can be achieved, and examples thereof include a pressure reducing valve and a flow rate control valve. Be done. The flow control valve may be opened and closed manually, or may be operated via a valve actuator such as a pneumatic valve, an electric valve, a hydraulic valve, a solenoid valve, or an electric valve. The flow control valve may be controlled by using a mass flow controller. The combustion air flow rate control device 103 and the fuel flow rate control device 106 may be used alone or in combination of two or more.

The amount of soot generated in the combustion part by the main burner 114 for soot generation is 0.02 g / min per 1 L of filter volume from the viewpoint of simulating ash accumulation corresponding to the life mileage of the actual vehicle in a short time. It is preferable to control the flow rate of the combustion air and the flow rate of the fuel supplied to the soot generation main burner so as described above. It is more preferable to control the flow rate of the combustion air and the flow rate of the fuel supplied to the main burner for soot generation so that the amount of soot generated is 0.02 g / min or more per 1 L of the filter volume, and the volume of the filter is 1 L. It is even more preferable to control the flow rate of the combustion air and the flow rate of the fuel supplied to the soot-generating main burner so as to be 0.05 g / min or more per unit. There is no particular restriction on the upper limit of the amount of soot generated, but if it is made excessively large, the inlet of the filter will be blocked by soot and it will be difficult for soot to accumulate inside the filter. It is preferably 0.5 g / min or less per 1 L of the volume of the filter. Here, the volume of the filter refers to a value measured from the external dimensions of the filter, and does not consider the space inside the filter.

The content of soot in the combustion gas can also be changed by the size of the opening diameter of the fuel supply hole 117a of the soot generation main burner 114. Specifically, if a fuel supply hole 117a having a large opening diameter is used for the main burner 114 for soot generation, the amount of soot in the combustion gas tends to increase, and if a fuel supply hole 117a having a small opening diameter is used, the combustion gas The amount of soot inside tends to decrease. From the viewpoint of increasing the content of soot in the combustion gas, the opening diameter of the fuel supply hole 117a is preferably 4 mm or more, and more preferably 6 mm or more. However, even if the opening diameter of the fuel supply hole 117a is too large, the amount of soot generated may decrease. Therefore, the opening diameter of the fuel supply hole 117a is preferably 14 mm or less, and more preferably 10 mm or less. preferable. Here, the opening diameter of the fuel supply hole 117a refers to the diameter equivalent to a circle.

The content of soot in the combustion gas can also be changed by the number of fuel supply holes 117a. If the number of fuel supply holes 117a is small and the fuel is concentrated and supplied into the combustion unit 110 without being dispersed, the amount of soot generated tends to be large. Therefore, from the viewpoint of increasing the soot content in the combustion gas, the number of fuel supply holes 117a installed in one soot generation main burner 114 is preferably two or less, and one is preferable. It is more preferable to have it.

Generally, in order to increase the content of soot in the combustion gas, the excess air ratio should be set low so that the fuel is likely to be incompletely burned. However, the soot contained in the exhaust gas of an actual vehicle often has a relatively high combustion temperature of 500 ° C. or higher. Therefore, from the viewpoint of generating soot having a high combustion temperature similar to that of an actual vehicle, the average excess air ratio in the combustion unit 110 is preferably 0.9 to 2.0 while the main burner 114 for generating soot is being operated. Can generate soot having a high combustion temperature by burning in the range of 1.0 to 1.5. Illustratively, soot having a combustion temperature of 500 to 560 ° C. can be produced. In one embodiment, soot can contain 90% by weight or more of carbon. Soot may contain SOF (Soluble Organic Fraction: soluble organic component) in addition to carbon.

The average excess air ratio in the combustion unit 110 is the flow rate of the entire combustion air supplied from the combustion air inlet 112 (Nm ³ / min) and the flow rate of the fuel supplied to the soot generation main burner 114 (Nm 3 / min). Nm ³ / min) and calculated using.

The position where the main burner 114 for soot generation is arranged is 100 mm from the position where the pilot burner 116 is arranged toward the downstream side (downstream side in the flow direction of the combustion air), and the pilot burner 116 It is preferable that the soot is within a range of 200 mm from the position where the soot is arranged toward the upstream side (upstream side in the flow direction of the combustion air). The position where the soot generation main burner 114 is arranged is 100 mm from the position where the pilot burner 116 is arranged to the downstream side, and 100 mm from the position where the pilot burner 116 is arranged to the upstream side. It is more preferable that it is within the range up to the position of.

The combustion air supplied to the combustion unit 110 when operating the soot generation main burner 114 can be supplied from the air supply device 101 through the air pipe 102. The air supply device 101 is not limited, but a dry air supply device, a blower, a compressor, or the like can be preferably used. It is preferable to pressurize the air with a compressor to generate it. Then, it is preferable that the combustion air (compressed air) whose flow rate is controlled by the flow rate control device 103 is supplied to the inlet 112 of the combustion air. As a result, the flow velocity of the combustion air becomes high, and soot having a high combustion temperature is easily generated. Specifically, the average flow velocity of the combustion air at the inlet 112 of the combustion air is preferably 0.1 m / sec or more, and more preferably 0.5 m / sec or more. Further, from the viewpoint of increasing the amount of soot generated, the average flow velocity of the combustion air at the inlet 112 of the combustion air is preferably 4.0 m / sec or less, and is preferably 2.0 m / sec or less. More preferred. The average flow velocity is calculated by the air supply flow rate (Nm ³ / sec) ÷ the cross-sectional area of the inlet (m ² ).

Referring to FIG. 2, FIG. 2 shows a schematic side view of a combustion portion of the filter test apparatus according to the embodiment of the present invention. In a preferred embodiment, the soot-generating main burner 114 has a tubular shape (typically cylindrical) and is inserted inside the combustion unit 110 so that its central axis is orthogonal to the direction in which the combustion air flows. .. The insertion direction of the soot generation main burner 114 is not particularly limited, but for example, it can be inserted horizontally from the side surface of the combustion unit 110. In FIG. 2, the arrow starting from the central axis of the soot generation main burner 114 indicates the direction of the fuel supply hole, that is, the fuel injection direction. If the direction of the fuel supply hole is set to be opposite to the flow direction of the combustion air, a large amount of soot having a high combustion temperature can be generated. Specifically, in order to generate a large amount of soot having a high combustion temperature, the angle Q1 formed by the direction of the fuel supply hole and the flow direction of the combustion air is preferably 90 ° to 180 °, preferably 135 °. It is more preferably ~ 180 °.

(1.3 Main burner for generating high heat gas for filter regeneration)
Referring to FIG. 1, the combustion unit 110 may further include a main burner 118 for generating high heat gas for filter regeneration. The main burner 118 for generating high-temperature gas for filter regeneration generates high-temperature combustion gas, and the high-temperature combustion gas can be used to burn and remove soot accumulated inside the filter. Therefore, in one embodiment of the method of using the filter test apparatus 100, the hot gas for filter regeneration is generated by using the main burner for generating high heat gas for filter regeneration with the operation of the feeder stopped, and the hot gas for filter regeneration is collected by the filter. Includes burning soot. The shape of the burner for generating high heat gas for filter regeneration is not particularly limited, but may be, for example, a cylinder, and typically a cylinder.

In the soot generation main burner 114 described above, the combustion gas temperature can be about 100 to 300 ° C., and typically about 180 to 250 ° C. On the other hand, in the main burner 118 for generating high heat gas for filter regeneration, the temperature of the generated combustion gas can be set to 500 ° C. or higher. From the viewpoint of removing soot accumulated in the filter, it is more preferable that the temperature of the combustion gas generated by the main burner 118 for generating high heat gas for filter regeneration is 600 ° C. or higher. The upper limit of the combustion gas temperature of the main burner 118 for generating high heat gas for filter regeneration is not particularly set, but it is preferably 1000 ° C. or lower for safety reasons.

The temperature of the combustion gas can be controlled, for example, by adjusting the flow rate of the combustion air supplied to the combustion unit 110 and the flow rate of the fuel supplied to the main burner 118 for generating the high heat gas for filter regeneration. For example, the temperature of the combustion gas can be raised by increasing the flow rate of the combustion air or increasing the flow rate of the fuel. Therefore, in one embodiment of the present invention, the filter test device 100 can include a flow rate control device 103 for combustion air supplied to the combustion unit 110. Further, in one embodiment of the present invention, the filter test device 100 can include a fuel flow rate control device 106 supplied to the main burner 118 for generating high heat gas for filter regeneration. The combustion air flow rate control device 103 or the fuel flow rate control device 106 is not particularly limited as long as the object of controlling the flow rate of air or fuel can be achieved, and examples thereof include a pressure reducing valve and a flow rate control valve. The flow control valve may be opened and closed manually, or may be operated via a valve actuator such as a pneumatic valve, an electric valve, a hydraulic valve, a solenoid valve, or an electric valve. The flow control valve may be controlled by using a mass flow controller. As the flow rate control device 103 for combustion air, one flow rate control device may be used, or two or more flow rate control devices may be used in combination. Similarly, as the fuel flow rate control device 106, one flow rate control device may be used, or two or more flow rate control devices may be used in combination.

In the main burner 118 for generating high heat gas for filter regeneration, unlike the main burner 114 for generating soot, it is desirable that the content of soot in the combustion gas is small. The soot content can be changed by the opening diameter of the fuel supply hole 117b of the main burner 118 for generating high heat gas for filter regeneration. Specifically, if the fuel supply hole 117b having a small opening diameter is formed in the main burner 118 for generating high heat gas for filter regeneration, the amount of soot in the combustion gas tends to decrease. From the viewpoint of reducing the soot content in the combustion gas, the opening diameter of the fuel supply hole 117b is preferably 6 mm or less, more preferably 4 mm or less, and even more preferably 3 mm or less. .. Here, the opening diameter of the fuel supply hole 117b refers to a circle-equivalent diameter.

The content of soot in the combustion gas can also be changed by the number of fuel supply holes 117b of the main burner 118 for generating high heat gas for filter regeneration. When the number of fuel supply holes 117b is increased and the fuel is dispersed and supplied into the combustion unit 110, the amount of soot generated tends to be smaller. Therefore, from the viewpoint of reducing the soot content in the combustion gas, the number of fuel supply holes 117b installed in one main burner 118 for generating high heat gas for filter regeneration is preferably 5 or more, preferably 10 or more. More preferably, 20 or more is even more preferable. Further, when a plurality of fuel supply holes (fuel injection ports) 117b are installed, it is preferable to arrange them in a row from the viewpoint of combustion stability and suppression of soot.

From the viewpoint of reducing the soot content in the combustion gas, the average excess air ratio in the combustion unit 110 is preferably 2 to 10 while the main burner 118 for generating high heat gas for filter regeneration is in operation, which is more preferable. Is 3-8. The average excess air ratio in the combustion unit 110 is supplied to the flow rate (Nm ³ / min) of the entire combustion air supplied from the inlet 112 of the combustion air and the main burner 118 for generating high heat gas for filter regeneration. Calculated using the fuel flow rate (Nm ³ / min).

The position where the main burner 118 for generating high heat gas for filter regeneration is arranged is 100 mm from the position where the pilot burner 116 is arranged toward the downstream side (downstream side in the flow direction of the combustion air). , It is preferable that the pilot burner 116 is within a range of 200 mm toward the upstream side (upstream side in the flow direction of the combustion air) from the position where the pilot burner 116 is arranged. The position where the main burner 118 for generating high heat gas for filter regeneration is arranged is 100 mm from the position where the pilot burner 116 is arranged toward the downstream side, and the position upstream from the position where the pilot burner 116 is arranged. It is more preferable that it is within the range up to the position of 100 mm toward.

It is preferable that the combustion air supplied to the combustion unit 110 when the main burner 118 for generating high heat gas for filter regeneration is operated is also generated by pressurizing the air with a compressor. Then, it is preferable that the combustion air (compressed air) adjusted by the flow rate control device 103 is supplied to the combustion air inlet 112. From the viewpoint of reducing the amount of soot generated, the average flow velocity of the combustion air at the inlet 112 of the combustion air is preferably 1.0 m / sec or more, and more preferably 4.0 m / sec or more. .. Further, from the viewpoint of ensuring stable combustion, the average flow velocity of the combustion air at the inlet 112 of the combustion air is preferably 40.0 m / sec or less, and more preferably 20.0 m / sec or less. preferable. The average flow velocity is calculated by the air supply flow rate (Nm ³ / sec) ÷ the cross-sectional area of the inlet (m ² ).

Referring to FIG. 2, FIG. 2 shows a schematic side view of a combustion portion of the filter test apparatus according to the embodiment of the present invention. In a preferred embodiment, the main burner 118 for generating high heat gas for filter regeneration has a cylindrical shape (typically a cylindrical shape), and the inside of the combustion unit 110 is formed so that its central axis is orthogonal to the direction in which the combustion air flows. Will be inserted into. The insertion direction of the main burner 118 for generating high heat gas for filter regeneration is not particularly limited, but for example, it can be inserted horizontally from the side surface of the combustion unit 110. In FIG. 2, the arrow starting from the central axis of the main burner 118 for generating high heat gas for filter regeneration indicates the direction of the fuel supply hole, that is, the fuel injection direction. The generation of soot can be suppressed by setting the direction of the fuel supply hole in the same direction as the flow direction of the combustion air. Specifically, in order to suppress the generation of soot, the angle Q2 formed by the direction of the fuel supply hole and the flow direction of the combustion air (in the illustrated embodiment, the direction of the central axis of the tubular combustion portion) is 0 ° to 0. It is preferably 90 °, more preferably 0 ° to 45 °.

It is preferable that the combustion unit 110 is provided with at least one main burner 114 for generating soot and a main burner 118 for generating high heat gas for filter regeneration. However, it is also possible to provide a plurality of one or both of the soot generation main burner 114 and the filter regeneration high heat gas generation main burner 118. Further, it is also possible to share the soot generation main burner 114 and the filter regeneration high heat gas generation main burner 118 with one main burner. In this case, the orientation of the fuel supply hole can be configured to be switchable between when soot is generated and when high heat gas is generated. Further, the opening diameter of the fuel supply hole of the main burner can be configured to be switchable between the time of generating soot and the time of generating high heat gas for filter regeneration.

Liquid fuel and gaseous fuel can be used as fuels for the main burner 114 for generating soot, the pilot burner 116, and the main burner 118 for generating high heat gas for filter regeneration, but gaseous fuel is preferable from the viewpoint of ease of handling and safety. Examples of the gaseous fuel include methane gas, ethane gas, propane gas, butane gas and the like. One type of fuel may be used alone, or two or more types may be used in combination. The fuel supplied to the combustion unit 110 when operating the soot generation main burner 114, the pilot burner 116, and the filter regeneration high heat gas generation main burner 118 can be supplied from the fuel supply device 104 through the fuel pipe 105. The fuel supply device 104 is not limited, but a fuel cylinder, a fuel supply pump, or the like can be preferably used.

(1.4 feeder)
Referring to FIG. 1, the feeder 120 can supply nonflammable particles simulating ash in one embodiment. In an actual vehicle, the speed at which ash derived from engine oil deposits on the filter is very slow, so supplying nonflammable particles that imitate ash prepared in advance using the feeder 120 is an ash that is similar to the actual vehicle. It is effective for simulating the state of deposition in a short time.

The nonflammable particles simulating ash contain, in one embodiment, a compound containing one or more elements selected from the group consisting of Ca, P, Zn, Mg and S. Specific examples of the nonflammable particles simulating ash include, but are not limited to, calcium sulfate particles, calcium carbonate particles, phosphates, and zinc sulfate. Among these, calcium sulfate and calcium carbonate are preferable because they are similar to the components of ash actually contained in the exhaust gas discharged from the engine. One type of nonflammable particles may be used alone, or two or more types may be used in combination.

As the nonflammable particles supplied by the feeder 120, it is preferable to use particles having a particle size similar to the particle size of the solid component actually contained in the exhaust gas discharged from the engine. Therefore, the average particle size of the nonflammable particles is preferably 100 to 100,000 nm, more preferably 100 to 1000 nm. By using such nonflammable particles, it becomes possible to more accurately simulate the state of the exhaust gas actually discharged from the engine. Here, the average particle size of the nonflammable particles is a 50% particle size when the cumulative particle size distribution on a volume basis is measured by a laser diffraction / scattering particle size measuring device based on a light scattering method.

The configuration of the feeder 120 is not particularly limited as long as it can supply nonflammable particles simulating ash, but the feeder 120 is configured to be able to supply nonflammable particles in a fixed amount, which controls the deposition rate of ash. It is preferable in that. In one embodiment, the feeder 120 includes an accommodating portion 121 for holding the non-combustible particles and a non-combustible particle discharging mechanism 122 in the accommodating portion 121. The discharge mechanism 122 can be operated by a drive device such as a motor. The discharge rate of nonflammable particles from the feeder 120 can be controlled by, for example, controlling a drive device such as a motor by inverter control.

From the viewpoint of depositing ash on the filter in a short time, the supply amount of nonflammable particles from the feeder should be 0.05 g / min or more per 1 L of the volume of the filter, preferably 1 g / min or more. In addition, it is advantageous to control. In addition, there is no particular restriction on the upper limit of the amount of non-combustible particles supplied from the feeder, but if it is made excessively large, the inlet of the filter will be blocked by the non-combustible particles, and it will be difficult for non-combustible particles to accumulate inside the filter. It is advantageous to control the supply of nonflammable particles from the feeder to be 30 g / min or less per 1 L of the filter volume, preferably 15 g / min or less.

Then, from the viewpoint of bringing the accumulated state of soot and ash deposited on the filter closer to the accumulated state of soot and ash similar to the actual vehicle, the non-combustibility from the feeder with respect to the amount of soot generated (g / min) in the combustion part. It is preferable to control the ratio of the supply amount (g / min) of the sex particles in the range of 0.5 to 40, and more preferably in the range of 5 to 15.

FIG. 3 is a perspective view schematically showing a structural example of a feeder 300 capable of supplying nonflammable particles simulating ash. The feeder 300 includes a storage container 311 and an impeller 312 that is installed below the storage container 311 and can rotate in a fixed direction about a rotation axis extending in the vertical direction. The storage container 311 is for accommodating the nonflammable particles 305 simulating ash, and can be provided with a hole 315 at the bottom. At the bottom of the storage container 311 is a fraying blade 303 that can rotate in a fixed direction about a rotation axis extending in the vertical direction. The impeller 312 is arranged below the hole 315 and can be rotated in a certain direction (eg, clockwise) by a drive device (not shown) such as a motor. The feeder 300 preferably has a controller capable of controlling the rotation speed of the impeller 312. By changing the rotation speed of the impeller 312, it is possible to change the supply speed of the nonflammable particles 305 from the feeder 300.

In the impeller 312, a substantially U-shaped receiving space 314 in a plan view can be formed between adjacent blades 313. In the process of rotating the impeller 312, when the receiving space 314 is located at the position A directly below the hole 315 of the containing container 3, the non-combustible particles 305 contained in the containing container 311 gravity through the hole 315 at the bottom. It falls and fits in this receiving space 314. At this time, the frayed blade 303 passes while rotating on the receiving space 314, so that the overflow portion of the nonflammable particles 305 is worn out. After that, when the receiving space 314 reaches the position C of the outlet 306 due to the rotation of the impeller 312, the nonflammable particles 305 contained in the receiving space 314 fall downward due to gravity and flow out from the feeder 300. Then, it is supplied to the device 130 for air transportation described later.

It takes a certain amount of time from the fall of the incombustible particles 305 contained in the receiving space 314 to the falling of the incombustible particles 305 contained in the next receiving space 314. That is, from the time when one receiving space 314 reaches the position C of the exit 306, the receiving space 314 located at the position B immediately before the one receiving space 314 reaches the above position C, and then the receiving space. It takes a certain amount of time for the nonflammable particles 305 contained in 314 to fall. Therefore, the nonflammable particles 305 are supplied intermittently from the feeder 300 shown in FIG. 3 at regular intervals. The position B is a position immediately before the position C in the rotation direction of the impeller 312.

(1.5 A device for air transporting nonflammable particles supplied from a feeder)
Referring to FIG. 1, the filter test apparatus 100 includes, in one embodiment, an apparatus 130 for air transporting nonflammable particles supplied from the feeder 120. The device 130 for air transportation is not particularly limited as long as the nonflammable particles supplied from the feeder 120 can be air-transported to the mixing unit 140, and either a pressure feeding type or a suction type may be adopted. From the viewpoint of simulating the exhaust gas from the engine, it is preferable to use a device capable of air transportation by a pressure feeding type using an air supply device 134.

In one embodiment, the device 130 for air transportation may include an air flow rate control device 135. The air flow rate control device 135 is not particularly limited as long as the object of controlling the air flow rate can be achieved, and examples thereof include a pressure reducing valve and a flow rate control valve. The flow control valve may be opened and closed manually, or may be operated via a valve actuator such as a pneumatic valve, an electric valve, a hydraulic valve, a solenoid valve, or an electric valve. The flow control valve may be controlled by using a mass flow controller. One of the air flow rate control devices 135 may be used, or two or more of them may be used in combination.

The pressure of the air supplied from the device 130 for air transportation is preferably 0.05 MPaG or more, and more preferably 0.1 MPaG or more, from the viewpoint of smooth air transportation of nonflammable particles. Since the pressure of the air supplied from the device 130 for air transportation does not need to be excessively increased, it is preferably 0.5 MPaG or less, and more preferably 0.3 MPaG or less.

FIG. 4 schematically describes a structural example of the device 400 for air-transporting nonflammable particles supplied from the feeder. The device 400 for air transportation includes a pipe 402 for transporting noncombustible particles supplied from the feeder, a pipe 404 for transporting air, and a flow control device 407 for air flowing through the pipe 404 for transporting air. And an air supply device 408 for sending air to the pipe 404. The air blower 408 is not limited, but a dry air supply device, a blower, a compressor and the like can be preferably used.

The pipe 402 for transporting nonflammable particles is connected to a venturi portion 406 provided in the middle of the pipe 404 for transporting air. In the Venturi section 406, the diameter of the pipe 404 for transporting air is reduced, and the air flow velocity increases due to the Venturi effect, and a low pressure is generated. As a result, the non-combustible particles flowing through the pipe 402 for transporting the non-combustible particles are sucked and introduced into the pipe 404 for transporting the air. The pipe 404 for transporting air is connected to the air inlet 142 accompanied by the incombustible particles in the mixing portion 140 on the downstream side of the venturi portion 406. Therefore, the air accompanied by the non-combustible particles generated by mixing the air and the non-combustible particles in the venturi section 406 proceeds downstream in the pipe 404 and is supplied into the mixing section 140 from the air inlet 142.

(1.6 mixed part)
Referring to FIG. 1, in one embodiment, the filter test apparatus 100 has an air inlet 142 accompanied by nonflammable particles from the apparatus 130 for air transportation, and a mixed gas by mixing the combustion gas and the air. A mixing section 140 is provided with a mixing space 144 for generation. Examples of the material of the wall for partitioning the mixing portion 140 include, but are not limited to, stainless steel, nickel alloy, and the like. In one embodiment, the mixing unit 140 can have a tubular shape as a whole, and can typically have a cylindrical shape. In this case, the inlet 146 of the combustion gas generated in the combustion section is provided at one end (on the bottom side of one side) of the tubular mixing section, and the outlet 148 of the mixed gas generated in the tubular mixing section 140 is other than the tubular mixing section. It can be provided at the end (the other bottom side). Further, the air inlet 142 accompanied by the nonflammable particles can be provided on the side surface of the cylindrical mixing portion.

Further, as shown in FIG. 1, it is preferable that a flange portion (flange portion) 147 is formed at the inlet 146 of the combustion gas and the outlet 148 of the mixed gas for joining with other members or pipes. ..

In one embodiment, the mixing unit 140 may include an inlet 149 for cooling air. By supplying cooling air to the mixing unit 140, the temperature of the mixing unit 140 can be lowered. Further, the temperature inside the mixing unit 140 can be adjusted by adjusting the flow rate of the cooling air supplied to the inlet 149 of the cooling air. It is also possible to adjust the total flow rate of the gas sent to the filter. When the mixing unit 140 has a cylindrical shape, the cooling air inlet 149 can be provided on the side surface of the mixing unit 140. The cooling air inlet 149 may be installed so as to be offset from the air inlet 142 accompanied by the incombustible particles from the device 130 for air transportation to the upstream side or the downstream side with respect to the flow direction of the combustion gas. , Preferably because it prevents the flow of non-combustible particles from being disturbed.

The cooling air supplied to the mixing unit 140 can be supplied from the air supply device 101 through the air pipe 102. The air supply device 101 is not limited, but a dry air supply device, a blower, a compressor, or the like can be preferably used. An air supply device 101 may be individually installed for the cooling air to form an independent piping system, but by using the air supply device 101 common to the combustion air and branching the air piping 102. It is economical to form a piping system for cooling air. A flow rate control device 103 can be installed in the middle of the cooling air piping. Since the flow rate control device 103 for the cooling air is the same as the flow rate control device 103 described in the description of the combustion air, detailed description thereof will be omitted.

(1.7 filter installation part)
Referring to FIG. 1, in one embodiment, the filter test apparatus 100 has a space 154 for installing a filter 152 for collecting soot and nonflammable particles in a mixed gas, and an outlet of purified gas from the filter 152. A filter installation unit 150 provided with 156 is provided. The filter installation unit 150 can be provided in the flow path of the mixed gas generated by the mixing unit 140. Examples of the material of the wall for partitioning the filter installation portion 150 include, but are not limited to, stainless steel, nickel alloy, and the like. When the filter 152 is installed in the filter installation unit 150 and the filter test device 100 is operated to generate the mixed gas, the mixed gas containing soot and ash from the mixing unit 140 is transferred to the filter installed in the filter installation unit 150. Pass through 152. Since the soot and nonflammable particles in the mixed gas are collected by the filter 152, the purified gas is discharged from the outlet of the filter 152 according to the performance of the filter. The purified gas can be sent to an exhaust system such as a duct.

In one embodiment, the filter installation portion 150 can have a cylindrical shape as a whole, and can typically have a cylindrical shape. In this case, the inlet 155 of the mixed gas generated in the mixing section 140 is provided at one end (on the bottom surface side of one side) of the tubular filter installation section, and the outlet 156 of the purified gas after passing through the filter is provided in the tubular mixing section. It can be provided at the other end (the bottom side of the other). When the combustion unit 110, the mixing unit 140, and the filter installation unit 150 are all cylindrical, they can be arranged coaxially.

In one embodiment, the filter installation unit 150 may be provided with a pressure measuring instrument 158 for measuring the pressure loss between the inlet side and the outlet side of the filter 152. Measuring the pressure drop is useful, for example, to evaluate and analyze changes in the performance of the filter over time.

The temperature of the mixed gas at the inlet of the filter 152 depends on the temperature of the combustion gas generated in the combustion unit, and the temperature of the mixed gas at the inlet of the filter 152 can be controlled in the range of, for example, 100 to 1100 ° C. In one embodiment of the filter test apparatus according to the present invention, it is possible to generate soot having a combustion temperature of 500 ° C. or higher as described above. Soot with the same combustion temperature is generated in the actual vehicle. Therefore, by generating soot having a combustion temperature of 500 ° C. or higher, it is possible to measure the pressure loss of the filter in a state similar to that of an actual vehicle.

Further, as shown in FIG. 1, a flange portion (flange portion) 157 is formed at the inlet 155 of the mixed gas and the outlet 156 of the purified gas for joining with other members and pipes. Is preferable.

(1.8 filter)
The filter 152 to be tested by the filter test apparatus according to the present invention is not particularly limited as long as it can have a structure capable of collecting soot and ash in the gas. Typical filters include GPF (Gasoline Particulate Filter) and DPF (Diesel Particulate Filter) that collect soot and ash attached to the exhaust gas line of the combustion device. In one embodiment, the GPF and DPF extend from the first bottom surface to the second bottom surface, and a plurality of first cells in which the first bottom surface is opened and the second bottom surface is sealed, and from the first bottom surface to the second bottom surface. It comprises a columnar honeycomb structure having a plurality of second cells extending and sealing the second bottom surface and opening the first bottom surface, and a porous partition wall forming the first cell and the second cell.

FIG. 5 shows a perspective view schematically showing an example of the DPF. FIG. 6 shows a schematic cross-sectional view when an example of the DPF is observed from a direction orthogonal to the extending direction of the cell. The illustrated filter 500 is arranged inside the outer peripheral side wall 502 and the outer peripheral side wall 502, extends from the first bottom surface 504 to the second bottom surface 506, the first bottom surface 504 is opened, and the second bottom surface 506 is sealed. A plurality of first cells 508 and a plurality of first cells arranged inside the outer peripheral side wall 502, extending from the first bottom surface 504 to the second bottom surface 506, the first bottom surface 504 is sealed, and the second bottom surface 506 is opened. It is equipped with two cells 510. Further, the illustrated filter 500 includes a porous partition wall 512 that partitions the first cell 508 and the second cell 510, and the first cell 508 and the second cell 510 are alternately adjacent to each other with the partition wall 512 interposed therebetween. Have been placed.

When the combustion gas containing soot and ash is supplied to the first bottom surface 504 on the upstream side of the filter 500, the combustion gas is introduced into the first cell 508 and advances downstream in the first cell 508. Since the second bottom surface 506 on the downstream side of the first cell 508 is sealed, the combustion gas passes through the porous partition wall 512 that separates the first cell 508 and the second cell 510 into the second cell 510. Inflow. Since soot and ash cannot pass through the partition wall 512, they are collected and deposited in the first cell 508. After the soot and ash are removed, the clean exhaust gas flowing into the second cell 510 travels downstream in the second cell 510 and flows out from the second bottom surface 506 on the downstream side.

The material of the filter 152 is not limited, but may include porous ceramics. Examples of the ceramics include corgerite, mullite, zircon, aluminum titanate, silicon carbide, zirconia, spinel, indialite, sapphirine, corundum, and titania. And, these ceramics may contain one kind alone or may contain two or more kinds at the same time.

It is preferable to can the outer peripheral side wall 502 of the filter 152 so that there is no gap between the outer peripheral side wall 502 of the filter 152 and the inner wall of the filter installation portion 150.

Hereinafter, examples for better understanding the present invention and its advantages will be illustrated, but the present invention is not limited to the examples.

(1. Preparation of filter)
A DPF with the following specifications was prepared for the test.
Material: Made of Cordellite Shape: Cylindrical Dimensions: Diameter 118.4 mm x Height 127.0 mm (Volume: 1397439 mm ³ )
Cell density: 34 cells / cm ²
Bulkhead thickness: 150 μm
Cell shape (cross-sectional shape of the cell in the cross section perpendicular to the length of the cell): Porosity of the square partition: 48%
Average pore size of septum: 12 μm
Structure: Multiple first cells extending from the first bottom surface to the second bottom surface, opening the first bottom surface and sealing the second bottom surface, and extending from the first bottom surface to the second bottom surface, the second bottom surface is the eye. It has a columnar honeycomb structure having a plurality of second cells that are sealed and the first bottom surface is open, and a porous partition that partitions the first cell and the second cell. The first cell and the second cell are alternately arranged adjacent to each other with the partition wall in between, and each bottom surface has a checkered pattern.

(2. Configuration of test equipment)
A filter test device having the structure shown in FIG. 1 was manufactured. The specifications of each part are as follows. The combustion part, the mixing part and the filter installation part are substantially cylindrical, and these are arranged coaxially.

(3. Accumulation of soot and nonflammable particles in the filter)
After installing the filter in the filter installation section, the main burner for soot generation, the feeder, and the device for air transporting nonflammable particles of the filter test device are operated under the following conditions to generate a mixed gas in the mixed gas. Soot and nonflammable particles were collected by a filter.
<Main burner for soot generation>
Combustion air: Compressed air from the compressor is supplied at a flow rate of 1.5 Nm ³ / min using a mass flow controller, and an average flow rate of 1.6 m / sec. Fuel: Propane gas from a bomb is 0.01 Nm ³ using a mass flow controller. Supplied at a flow rate of / min Average air excess rate: 0.9
Combustion gas temperature at filter inlet: 200 ° C
<Feeder>
Structure: Powder quantitative supply device (Micron Feeder TF-70-CT manufactured by Aisin Nano Technologies Co., Ltd.)
Types of nonflammable particles: Ca compound Average particle size of nonflammable particles: 40 μm
Supply of nonflammable particles: 0.5 g / min
Control method of supply amount of non-combustible particles: Inverter control of the rotation speed of the gear that supplies the powder with a motor (device for air-transporting non-combustible particles)
Method: Pumping type (introduced into piping for transporting air using non-combustible particles using the Venturi effect)
Air pressure: 0.1MPaG
The test time was 1 Hr. After the test was completed, the weights of the soot and nonflammable particles accumulated in the filter were determined from the weight difference of the filters before and after the test and found to be 30 g. Of these, the weight of the nonflammable particles was 29 g. The weight of the non-combustible particles corresponds to the amount of non-combustible particles deposited during the running life of the gasoline-powered vehicle. In addition, the weight of the soot was calculated by subtracting the weight of the nonflammable particles calculated based on the supply amount of the nonflammable particles. As a result, it was confirmed that 0.02 g / min of soot was accumulated on average per 1 L of the filter volume.

(4. Pressure loss measurement)
After accumulating soot and nonflammable particles in the filter by the above test, with the feeder operation stopped, the main burner for generating high heat gas for filter regeneration was used with an average excess air ratio = 2 and the combustion gas temperature at the filter inlet = 500. The pressure loss between the inlet side and the outlet side of the filter was measured when the filter was operated for 1 Hr under the condition of high temperature gas per 1 L of the filter = 1 Nm ³ / min. When the inside of the filter was observed after the test, it was confirmed that substantially all of the soot remained and the pressure loss could be measured without burning the soot.

(5. Filter playback)
After accumulating soot and nonflammable particles in the filter by the above test, with the feeder operation stopped, the main burner for generating high heat gas for filter regeneration has an average excess air ratio = 5, and the combustion gas temperature at the filter inlet = 650. While operating at ° C. and high heat gas per 1 L of the filter = 1 Nm ³ / min, high heat gas for filter regeneration was generated, and the soot collected in the filter was burned. As a result, it was confirmed that the soot in the filter was removed and only the ash remained.

100 Filter test device 101 Air supply device 102 Air piping 103 Air flow control device 104 Fuel supply device 105 Fuel piping 106 Fuel flow control device 110 Combustion unit 112 Combustion air inlet 113 Combustion gas outlet 114 Main burner for soot generation 115 Combustion gas generation space 116 Pilot burner 117a Fuel supply hole of main burner for soot generation 117b Fuel supply hole of main burner for filter regeneration High heat gas generation Main burner 119 Flange part (flange part)
120 Feeder 121 Storage unit 122 Discharge mechanism of non-combustible particles 130 Device for transporting non-combustible particles by air 134 Air supply device 135 Air flow control device 140 Mixing unit 142 Mixing unit 142 Air inlet accompanied by non-combustible particles 144 Mixing space 146 Combustion gas inlet 148 Mixed gas outlet 147 Flange part (flange part)
148 Mixed gas outlet 149 Cooling air inlet 150 Filter installation part 152 Filter 154 Space for installing the filter 156 Purified gas outlet 157 Flange part (flange part)
158 Pressure measuring instrument 300 Feeder 303 Frayed blade 305 Non-combustible particles 306 Outlet 311 Containment vessel 312 Impeller 313 Blade 314 Receiving space 315 Hole 400 Device for air-transporting non-combustible particles 402 Pipe for transporting non-combustible particles 404 Piping for transporting air 406 Venturi part 407 Air flow control device 408 Air supply device 500 Filter 502 Outer side wall 504 First bottom surface 506 Second bottom surface 508 First cell 510 Second cell 512 partition wall

Claims (14)

Combustion section with combustion air inlet, soot generation main burner, pilot burner, and combustion gas generation space,
A feeder that can supply nonflammable particles that imitate ash,
A device for air transporting non-combustible particles supplied from the feeder,
An air inlet accompanied by non-combustible particles from the air transport device provided in the flow path of the combustion gas generated in the combustion unit, and the combustion gas and the air are mixed to generate a mixed gas. A mixing section with a mixing space for
A space for installing a filter for collecting soot and nonflammable particles in the mixed gas provided in the flow path of the mixed gas generated in the mixing section, and an outlet for purified gas from the filter are provided. Filter installation part and
A filter test device equipped with. The filter test apparatus according to claim 1, wherein the combustion unit includes a main burner for generating high heat gas for filter regeneration. The filter test apparatus according to claim 1 or 2, wherein the feeder is configured to be capable of quantitatively supplying nonflammable particles. The filter test apparatus according to any one of claims 1 to 3, wherein the nonflammable particles simulating ash contain a compound containing one or more elements selected from the group consisting of Ca, P, Zn, Mg and S. .. The filter test apparatus according to any one of claims 1 to 4, further comprising a pressure measuring instrument for measuring a pressure loss between the inlet side and the outlet side of the filter. The filter test apparatus according to any one of claims 1 to 5, further comprising a flow rate control device for combustion air supplied to the combustion unit. The filter test device according to any one of claims 1 to 6, further comprising a flow rate control device for fuel supplied to the soot generation main burner. The device for air transport is equipped with a pipe for transporting non-combustible particles supplied from the feeder and a pipe for transporting air.
The pipe for transporting the nonflammable particles is connected to a venturi portion provided in the middle of the pipe for transporting air.
The piping for transporting air is connected to the air inlet accompanying the nonflammable particles in the mixing section on the downstream side of the venturi section.
The filter test apparatus according to any one of claims 1 to 7. The filter test apparatus according to any one of claims 1 to 8, wherein the mixing unit includes an inlet for cooling air. Any one of claims 1 to 9, which includes installing a filter in the filter installation portion, operating a filter test device to generate a mixed gas, and collecting soot and nonflammable particles in the mixed gas with a filter. How to use the filter test equipment described in section. The flow rate of the combustion air and the flow rate of the fuel supplied to the main burner for soot generation are controlled so that the amount of soot generated in the combustion part is 0.02 g / min or more per 1 L of the filter volume, and the flow rate of the fuel is controlled from the feeder. The method of use according to claim 10, wherein the supply amount of the nonflammable particles is controlled to be 0.05 g / min or more per 1 L of the volume of the filter. 15. The usage described. The method of use according to any one of claims 10 to 12, comprising controlling the temperature of the mixed gas at the inlet of the filter in the range of 100 to 1100 ° C. The combustion unit is equipped with a main burner for generating high heat gas for filter regeneration, and with the feeder operation stopped, the main burner for generating high heat gas for filter regeneration is used to generate high heat gas for filter regeneration and is captured by the filter. The method of use according to any one of claims 10 to 13, which comprises burning the collected soot.

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