JP5568190B1 - Equipment for evaluating the performance of exhaust gas purification systems - Google Patents

Abstract

An apparatus capable of easily evaluating the performance of an exhaust gas purification system using a solid ammonia storage material at low cost.
A reaction tube 1 having an inlet 1a and an outlet 1b, in which an exhaust gas purification catalyst 2 is accommodated, is provided. One end 3a of the gas introduction tube 3 is connected to the inlet of the reaction tube, and the simulated gas is introduced from the other end 3b side of the gas introduction tube. An exhaust pipe 4 is connected to the outlet of the reaction tube. The first heating unit 5 is disposed outside the reaction tube. A gas analyzer 6 is provided in the exhaust pipe. A storage material tank 8 in which a solid ammonia storage material 7 is accommodated is provided. A second heating unit 9 is provided in the storage material tank. One end 10a of the ammonia supply pipe 10 is connected to the storage material tank, and the other end 10b is connected to the inlet of the reaction pipe.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for evaluating the performance of an exhaust gas purification system, and more particularly to an apparatus for evaluating the performance of an exhaust gas purification system using a solid ammonia storage material.

As one of exhaust gas purification systems, a urea SCR system is known in the prior art (see, for example, Patent Documents 1 and 2).
The urea SCR system is based on the principle that ammonia is chemically reacted with nitrogen oxides (NO _x ) to reduce it to urea and water. The urea SCR system uses the ammonia obtained by hydrolyzing urea water at high temperatures. is supplied to the SCR catalyst is a system that the NO _X in the exhaust gas was set to be decomposed into water and nitrogen.

  However, in the conventional urea SCR system, cyanuric acid, isocyanic acid, biuret, melamine, cyanic acid, and the like produced in the process of hydrolyzing urea water at a high temperature may be discharged from the system. There was a problem of causing serious air pollution.

  Therefore, in recent years, development of a solid ammonia storage material capable of absorbing and storing ammonia, and using the solid ammonia storage material, the ammonia generated by heating the solid ammonia storage material is supplied to the SCR catalyst. Development of exhaust gas purification systems made in this manner has been actively conducted (for example, see Patent Document 3).

  By the way, in this development, it is necessary to evaluate the performance of the SCR catalyst and the solid ammonia storage material, and to optimize the temperature control of the SCR catalyst and the solid ammonia storage material. An exhaust gas purification system using a solid ammonia storage material is attached to an actual vehicle.

  Therefore, it is not easy to access the exhaust gas purification system, and it takes a lot of time to replace the SCR catalyst and the solid ammonia storage material. In addition, a certain amount of the SCR catalyst and the solid ammonia storage material is required, and the cost is low. There was a problem that the test could not be done.

JP 2010-90808 A JP 2008-255937 A JP 2012-52476 A

  Therefore, the subject of this invention is providing the apparatus which can perform the evaluation of the performance of the exhaust gas purification system using a solid ammonia storage material easily at low cost.

In order to solve the above-mentioned problem, a first invention has a reaction tube having an inlet and an outlet, in which an exhaust gas purification catalyst is accommodated, and one end connected to the inlet of the reaction tube, and a simulated gas from the other end side. A gas introduction pipe to which gas is introduced, an exhaust pipe connected to an outlet of the reaction pipe, a first heating unit disposed outside the reaction pipe, and a downstream side of the exhaust gas purification catalyst in the reaction pipe or At least one gas analyzer provided in the exhaust pipe or both, a storage material tank containing a solid ammonia storage material therein, a second heating unit provided in the storage material tank, and one end An ammonia supply pipe connected to the storage material tank, the other end connected to the inlet of the reaction tube, an inert gas supply source, one end connected to the inert gas supply source, and the other end connected to the storage material Inert gas connected to the tank A paper tube, the inert-off valve provided in the middle of the gas supply pipe or a flow control valve or pressure control valve or of two or more thereof in combination with, the exhaust gas purification system, characterized in that those having a An apparatus for evaluating performance is configured.

In the above configuration, it is preferable that an on-off valve, a flow rate control valve, a pressure control valve, or a combination of two or more thereof is provided in the middle of the ammonia supply pipe .

In order to solve the above-mentioned problem, the second invention has a reaction tube having an inlet and an outlet, in which an exhaust gas purification catalyst is accommodated, and one end connected to the inlet of the reaction tube, from the other end side. A gas introduction pipe into which a simulated gas is introduced, an exhaust pipe connected to the outlet of the reaction pipe, a first heating unit disposed outside the reaction pipe, and downstream of the exhaust gas purification catalyst in the reaction pipe At least one gas analyzer provided on the side or the exhaust pipe or both, a plurality of storage material tanks containing solid ammonia storage material therein, and a second heating unit provided in the storage material tank And an ammonia supply pipe having one end connected to the storage material tank and the other end connected to the inlet of the reaction tube, each of the plurality of storage tanks containing different types of solid ammonia storage materials. That It is obtained by constituting the apparatus according to symptoms.
In this case, it is preferable that the one end of the ammonia supply pipe is branched into a plurality of parallel lines, and each of the plurality of storage material tanks is connected to a plurality of pipe lines branched in parallel.

  In this case, it is preferable that an on-off valve, a flow rate control valve, a pressure control valve, or a combination of two or more thereof is provided in the middle of each of the plurality of parallelly branched pipes of the ammonia supply pipe. The apparatus includes an inert gas supply source, one end connected to the inert gas supply source, the other end branched in parallel to each other, and each of the plurality of pipes branched in parallel to the plurality of storage material tanks. On / off valves, flow control valves, pressure control valves, or two or more of them provided in the middle of each of the inert gas supply pipes connected to each other and the plurality of pipes branched in parallel in the inert gas supply pipes It is preferable to further include the combination.

In the first and second inventions, the apparatus preferably further includes a control unit for controlling the first and second heating units, or the on-off valve, the flow rate control valve and the pressure control valve, or both. And preferably further includes a cooling unit for cooling the interior of the storage material tank.

In the first and second aspects of the invention , at least one cleaning liquid inlet that can be closed in an airtight state is provided in the middle of the ammonia supply pipe, and a third heating unit that heats the entire ammonia supply pipe is provided. It is preferable.
In this case, it is preferable that another cleaning liquid injection port that can be closed in an airtight state is provided at the top of the storage material tank, and a drainage port that can be closed in an airtight state is provided at the bottom of the storage tank. The inert gas supply pipe is provided with another cleaning liquid injection port that can be closed in an airtight state, and a fourth heating unit that heats the entire inert gas supply pipe is provided, at the bottom of the storage material tank. It is preferable to provide a drain port that can be closed in an airtight state.

According to the present invention, a simulation gas is used, and the simulation gas is introduced into the exhaust gas purification catalyst at the same concentration and temperature as the actual exhaust gas, while NO _X is occluded in the exhaust gas purification catalyst from the solid ammonia storage material. By supplying a predetermined amount of the generated ammonia to the exhaust gas purification catalyst, it is possible to simulate the purification process that occurs in the exhaust gas purification system mounted on the actual vehicle.
During this simulation, the performance of the exhaust gas purification catalyst and the solid ammonia storage material can be evaluated by measuring the gas component concentration with a gas analyzer.

  Further, according to the present invention, the exchange of the exhaust gas purification catalyst and the solid ammonia storage material is easy, and the evaluation can be performed with a small amount of the exhaust gas purification catalyst and the solid ammonia storage material, so that the cost required for the evaluation is reduced.

It is the schematic which shows the structure of the apparatus which evaluates the performance of the exhaust gas purification system by one Example of this invention. It is the schematic which shows the structure of the apparatus which evaluates the performance of the exhaust gas purification system by another Example of this invention. It is the schematic which shows the structure of the apparatus which evaluates the performance of the exhaust gas purification system by another Example of this invention. (A) is the schematic which shows the modification of the storage material tank of the apparatus of FIG. 1, (B) is the schematic which shows the modification of the storage material tank of the apparatus of FIG. 2, (C) FIG. 4 is an enlarged partially broken cross-sectional view showing a configuration in the vicinity of a cleaning liquid inlet of an ammonia supply pipe of the apparatus of FIG. 3.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing the configuration of an apparatus for evaluating the performance of an exhaust gas purification system according to one embodiment of the present invention.
Referring to FIG. 1, according to the present invention, a reaction tube 1 having an inlet 1a and an outlet 1b, in which an exhaust gas purification catalyst 2 is accommodated, is provided. The exhaust gas purification catalyst 2 is attached to a holder (not shown) and is fixed at a predetermined position in the reaction tube 1.

  One end 3 a of the gas introduction pipe 3 is connected to the inlet 1 a of the reaction pipe 1 so that the simulated gas is introduced from the other end 3 b side of the gas introduction pipe 3. An exhaust pipe 4 is connected to the outlet 1 b of the reaction tube 1.

  A first heating unit 5 is disposed outside the reaction tube 1, and a gas analyzer 6 is provided in the exhaust pipe 4. The number and mounting positions of the gas analyzers 6 are not limited to this embodiment, provided that at least one gas analyzer is provided on the downstream side of the exhaust gas purification catalyst 2 in the reaction tube 1 or the exhaust pipe 4 or both. Good.

  According to the present invention, the storage material tank 8 in which the solid ammonia storage material 7 is accommodated is also provided. The solid ammonia storage material 7 is a solid material capable of absorbing and storing ammonia, and has a characteristic of releasing ammonia when heated and absorbing ammonia when cooled. The solid ammonia storage material 7 includes a bulk type and a pellet type.

The storage material tank 8 is provided with a second heating unit 9, and the solid ammonia storage material 7 is heated directly or via the storage material tank 8 by the second heating unit 9.
One end 10 a of the ammonia supply pipe 10 is connected to the storage material tank 8, and the other end 10 b of the ammonia supply pipe 10 is connected to the inlet 1 a of the reaction pipe 1.
Then, the solid ammonia storage material is heated by the second heating unit 9, and the ammonia generated in the storage material tank 8 is supplied to the exhaust gas purification catalyst 2 in the reaction tube 1 through the ammonia supply tube 10. Yes.

  The first and second heating units 5 and 9 are controlled by the control unit 11. In the control unit 11, the operation sequences of the first and second heating units 5 and 9 are registered in advance, and heating control by the first and second heating units 5 and 9 is automatically performed based on the registered data. Is called. Note that the control unit 11 is not an essential component of the present invention and is provided as necessary.

  According to the present invention, an inert gas supply source 12 is further provided. One end 13 a of an inert gas supply pipe 13 is connected to the inert gas supply source 12, and the other end 13 b of the inert gas supply pipe 13 is connected to the storage material tank 8. An on-off valve 14 is provided in the middle of the inert gas supply pipe 13. In this case, a flow rate control valve or a pressure control valve can be used instead of the on / off valve, and if necessary, a combination of two or more of the on / off valve, the flow rate control valve and the pressure control valve is used. Also good.

Then, by adjusting the opening degree of the on-off valve 14, an inert gas is supplied at a predetermined flow rate from the inert gas supply source 12 through the inert gas supply pipe 13, and the inert gas and ammonia are supplied from the storage material tank 8. The mixed gas can be supplied into the reaction tube 1 through the ammonia supply tube 10.
Adjustment of the opening degree of the on-off valve 14 can be performed manually, or the operation sequence of the on-off valve can be registered in the control unit 11 in advance and can be automatically performed by the control unit 11.

Thus, by supplying the inert gas to the storage material tank 8, the supply flow rate of ammonia from the storage material tank 8 can be instantaneously increased.
The inert gas is used when the supply flow rate of ammonia is desired to be changed instantaneously and cannot be dealt with only by the heating control of the solid ammonia storage material 9, so that the inert gas supply source 12, the inert gas supply is used. The pipe 13 and the on-off valve 14 are provided as necessary.

Although not shown, an on-off valve, a flow rate control valve, a pressure control valve, or a combination of two or more thereof is provided in the middle of the ammonia supply pipe 10 as necessary. Adjustment of the opening degree of the valve is performed manually or automatically by the control unit 11.
In addition to the temperature control of the solid ammonia storage material 7 by the second heating unit 9 and the supply of the inert gas from the inert gas supply source 12, the opening degree of the on-off valve is adjusted, whereby the ammonia The supply flow rate is changed faster and with higher accuracy.

  In addition, a cooling unit is provided in the storage material tank 8 and the operation of the second heating unit 9 is stopped. At the same time, the solid ammonia storage material 7 is cooled by a cooler, and the solid ammonia storage material 7 reabsorbs ammonia. Thus, the supply flow rate of ammonia can be reduced instantaneously.

  FIG. 4A shows a modification in which a cooling unit is provided in the storage material tank 8 shown in FIG. Referring to FIG. 4A, in this modification, the wall surface of storage material tank 8 is covered with heat insulating material layer 24, and cooling piping system 25 a is disposed in heat insulating material layer 24. The refrigerant can be supplied from the refrigerant supply source 26 to the cooling pipe system 25a through the refrigerant supply pipe 25b. An on-off valve 27 is provided in the middle of the refrigerant supply pipe 25b.

Thus, according to the apparatus of the present invention, the simulated gas is introduced into the exhaust gas purification catalyst 2 in the reaction tube 1 at the same concentration and temperature as the actual exhaust gas while performing the heating control by the first heating unit 5. By the heating control by the second heating unit 9 and the supply of the inert gas from the inert gas supply source 12, the ammonia generated from the solid ammonia storage material 7 at the timing when NO _X is occluded in the exhaust gas purification catalyst 2 By supplying a predetermined amount to the exhaust gas purification catalyst 2, it is possible to simulate the purification process that occurs in the exhaust gas purification system mounted on the actual vehicle.
And during this simulation, the performance of the exhaust gas purification catalyst 2 and the solid ammonia storage material 7 can be evaluated by measuring the gas component concentration with the gas analyzer 6.

  Further, according to the apparatus of the present invention, the exchange of the exhaust gas purification catalyst 2 and the solid ammonia storage material 7 is easy, and the evaluation can be performed with a small amount of the exhaust gas purification catalyst 2 and the solid ammonia storage material 7. The cost required for this is reduced.

  FIG. 2 is a schematic diagram showing the configuration of an apparatus for evaluating the performance of an exhaust gas purification system according to another embodiment of the present invention. The embodiment of FIG. 2 differs from the embodiment of FIG. 1 only in the configuration for supplying ammonia. Therefore, in FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted below.

  In the embodiment of FIG. 2, the apparatus includes a plurality of storage material tanks 15a-15c. These storage material tanks 15a to 15c are provided with second heating sections 17a to 17c, respectively. The plurality of storage material tanks 15a to 15c have solid ammonia storage materials 16a to 16c whose performances should be compared with each other, for example, different types of solid ammonia storage materials or the same type of solid ammonia storage materials having different sizes and shapes. Is housed.

  Further, one end of the ammonia supply pipe 18 branches in parallel, and each of the plurality of storage material tanks 15a to 15c is connected to each of the plurality of parallel branched pipes 18a to 18c. The other end 18 d of the ammonia supply pipe 18 is connected to the inlet 1 a of the reaction pipe 1.

Further, on-off valves 19a to 19c are provided in the middle of the pipelines 18a to 18c branched in parallel to the plurality of ammonia supply pipes 18, respectively. The opening degree of the on-off valves 19 a to 19 c is adjusted manually or automatically by the control unit 11.
In this case, a flow rate control valve or a pressure control valve can be used instead of the on / off valve, and if necessary, a combination of two or more of the on / off valve, the flow rate control valve and the pressure control valve is used. Also good.
Note that the on-off valves 19a to 19c are provided as necessary, as in the embodiment of FIG.

  In addition, when it is desired to change the supply flow rate of ammonia instantaneously and cannot be handled only by heating control of the solid ammonia storage materials 16a to 16c, an inert gas is used as in the embodiment of FIG. Is done.

  FIG. 4B shows a modification in which the storage material tanks 15a to 15c are provided with an inert gas supply mechanism. Referring to FIG. 4B, in this modification, an inert gas supply source 12 'is provided, and one end 13a' of an inert gas supply pipe 13 'is connected to the inert gas supply source 12'. The other end of the inert gas supply pipe 13 ′ is branched into a plurality of parallel lines, and the plurality of parallel branched lines 13 b ′ to 13 d ′ are connected to the plurality of storage material tanks 15 a to 15 c, respectively. An opening / closing valve 14 ′ is provided in the middle of each of the pipelines 13 b ′ to 13 d ′ branched in parallel with the plurality of inert gas supply pipes 13 ′. In this case, a flow rate control valve or a pressure control valve can be used instead of the on / off valve, and if necessary, a combination of two or more of the on / off valve, the flow rate control valve and the pressure control valve is used. Also good.

  Then, the on-off valve 14 'related to the storage material tanks 15a to 15c for which the ammonia supply flow rate is to be increased instantaneously is opened at a predetermined opening. The opening degree of the on-off valve 14 ′ is adjusted manually or automatically by the control unit 11.

  According to the embodiment shown in FIG. 2, for example, it is possible to quickly and easily compare the performance of different types of solid ammonia storage materials and the performance of the same type of solid ammonia storage materials having different sizes and shapes. Can do.

  FIG. 3 is a schematic diagram showing the configuration of an apparatus for evaluating the performance of an exhaust gas purification system according to still another embodiment of the present invention. In this embodiment, a mechanism for cleaning the ammonia supply pipe and the storage material tank is added to the embodiment of FIG. Therefore, in FIG. 3, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted below.

With reference to FIG. 3, in this embodiment, a cleaning liquid inlet 20 that can be closed in an airtight state is provided in the middle of the ammonia supply pipe 10, and a third heating unit 21 that heats the entire ammonia supply pipe 10 includes Provided.
Although not shown, a first drain tank is disposed at the outlet of the exhaust pipe 4 of the reaction tube 1, and a second drain tank is disposed at the drain of the storage material tank 8.

FIG. 4C shows a configuration in the vicinity of the cleaning liquid inlet 20 of the ammonia supply pipe 10.
As shown in FIG. 4C, in this embodiment, the cleaning liquid inlet 20 includes a short pipe 30a branched and connected to the main body of the ammonia supply pipe 10, and an on-off valve 30b provided in the short pipe 30a. The on-off valve 30b can be closed in an airtight state.
The third heating unit 21 includes a coiled heater disposed around the side surface of the ammonia supply pipe 10 and a heat insulating material layer 29 covering the entire side surface of the ammonia supply pipe 10 including the heater. Has been.

The inert gas supply pipe 13 is provided with a cleaning liquid inlet 22 that can be closed in an airtight state, and a fourth heating unit 23 that heats the entire inert gas supply pipe 13. The configurations of the cleaning liquid injection port 22 and the fourth heating unit 23 are the same as those of the cleaning liquid injection port 20 and the third heating unit 21 of the ammonia supply pipe 10.
Further, although not shown, a drain port that can be closed in an airtight state is provided at the bottom of the storage material tank 8.
The first and second cleaning liquid inlets 20 and 22 and the drain outlet are normally closed in an airtight state.

  And when washing | cleaning the inside of the storage material tank 8 of an apparatus, the inside of the ammonia supply pipe | tube 10, and the inside of the reaction pipe 1, the 1st washing | cleaning liquid inlet 20 and the drainage port of the storage material tank 8 are closed. Then, the cleaning liquid is injected from the second cleaning liquid injection port 22. The cleaning liquid is injected by closing the on-off valve 14 of the inert gas supply pipe 13 and injecting only the cleaning liquid under pressure, or by injecting the cleaning liquid while supplying the inert gas from the inert gas supply source 12. Made by.

  The cleaning liquid injected from the second cleaning liquid inlet 22 flows into the storage material tank 8 through the inert gas supply pipe 13. The cleaning liquid overflowed from the storage material tank 8 further flows into the reaction tube 1 through the ammonia supply pipe 10 and is finally collected in the first drain tank through the exhaust pipe 4.

  In this way, cleaning is performed while the cleaning liquid flows through the inside of the storage tank 8, the inside of the ammonia supply pipe 10, and the inside of the reaction pipe 1. Then, after a predetermined time has elapsed, the injection of the cleaning liquid is stopped, the drain of the storage material tank 8 is opened, and the cleaned liquid stored in the storage material tank 8 is collected in the second drain tank. The

  After the recovery of the liquid after the cleaning process to the first and second drain tanks is completed, the first to fourth heating units 5, 9, 21, and 23 are operated, whereby the inert gas supply pipe 13 is operated. , The storage material tank 8, the ammonia supply pipe 10, and the reaction pipe 1 are dried to complete the cleaning.

  Thus, according to this embodiment, it is possible to easily remove dirt (e.g., scattered exhaust gas purification catalyst and solid ammonia storage material debris) generated in the apparatus when evaluating the performance of the exhaust gas purification system.

It is also possible to clean only the inside of the reaction tube 1 or only the inside of the storage material tank. In this case, it is preferable that at least one on-off valve is provided at a portion of the ammonia supply pipe 10 between the first cleaning liquid inlet 20 and the storage material tank 8.
When cleaning only the inside of the reaction tube 1, the cleaning liquid is injected from the first cleaning liquid inlet 20 with the on / off valve of the ammonia supply pipe 10 being closed. Then, the cleaning liquid flows into the reaction tube 1 through the ammonia supply pipe 10 and is finally collected in the first drain tank through the exhaust pipe 4. After the recovery of the liquid after the cleaning process to the first drain tank is completed, the first and third heating units 5 and 21 are operated to dry the inside of the ammonia supply pipe 10 and the inside of the reaction pipe 1. , Cleaning is complete.

  When cleaning only the inside of the storage material tank 8, the cleaning liquid is injected from the second cleaning liquid injection port 22 with the on-off valve of the ammonia supply pipe 10 closed and the drain port of the storage tank 8 opened. Is done. Then, after the inside of the storage material tank 8 is cleaned with the cleaning liquid and the recovery of the liquid after the cleaning process into the second drain tank is completed, the second and fourth heating units 9 and 23 are operated. The inside of the inert gas supply pipe 13 and the inside of the storage material tank 8 are dried, and the cleaning is completed.

  If the storage material tank 8 is provided with an inert gas supply mechanism, the inert gas supply pipe can be used for injecting the cleaning liquid as described above. If a gas supply mechanism is not provided, the storage tank is provided with a cleaning liquid inlet that can be closed in an airtight state at the top of the storage material tank, and a drainage port that can be closed in an airtight state at the bottom of the storage tank. The material tank may be cleaned.

DESCRIPTION OF SYMBOLS 1 Reaction tube 1a Inlet 1b Outlet 2 Exhaust gas purification catalyst 3 Gas introduction pipe 3a One end 3b Other end 4 Exhaust pipe 5 First heating part 6 Gas analyzer 7 Solid ammonia storage material 8 Storage material tank 9 Second heating part 10 Ammonia Supply pipe 10a One end 10b Other end 11 Control unit 12, 12 'Inert gas supply source 13, 13' Inert gas supply pipe 13a, 13a 'One end 13b Other end 13b'-13d' A plurality of pipelines 14 branched in parallel, 14 'On-off valve 15a-15c Storage material tank 16a-16c Solid ammonia storage material 17a-17c 2nd heating part 18 Ammonia supply pipe 18a-18c Pipe line 18d branched in parallel The other end 19a-19c On-off valve 20 Cleaning liquid injection Inlet 21 Third heating part 22 Cleaning liquid inlet 23 Fourth heating part 24 Heat insulating material layer 25a Cooling piping system 25b Refrigerant supply pipe 26 Refrigerant supply source 27 Opening and closing 28 coiled heater 29 heat insulating material layer 30a short pipe 30b off valve

Claims (11)

A reaction tube having an inlet and an outlet and containing an exhaust gas purification catalyst therein;
A gas introduction pipe having one end connected to the inlet of the reaction tube and a simulated gas introduced from the other end;
An exhaust pipe connected to the outlet of the reaction tube;
A first heating unit disposed outside the reaction tube;
At least one gas analyzer provided on the downstream side of the exhaust gas purification catalyst in the reaction tube and / or the exhaust tube;
A storage tank containing a solid ammonia storage material inside;
A second heating unit provided in the storage material tank;
An ammonia supply pipe having one end connected to the storage material tank and the other end connected to the inlet of the reaction tube;
An inert gas source;
An inert gas supply pipe having one end connected to the inert gas supply source and the other end connected to the storage material tank;
An on-off valve, a flow control valve, a pressure control valve, or a combination of two or more thereof provided in the middle of the inert gas supply pipe is evaluated. apparatus.   The apparatus according to claim 1, wherein an opening / closing valve, a flow control valve, a pressure control valve, or a combination of two or more thereof is provided in the middle of the ammonia supply pipe. A reaction tube having an inlet and an outlet and containing an exhaust gas purification catalyst therein;
A gas introduction pipe having one end connected to the inlet of the reaction tube and a simulated gas introduced from the other end;
An exhaust pipe connected to the outlet of the reaction tube;
A first heating unit disposed outside the reaction tube;
At least one gas analyzer provided on the downstream side of the exhaust gas purification catalyst in the reaction tube and / or the exhaust tube;
A plurality of storage material tanks containing solid ammonia storage material therein;
A second heating unit provided in the storage material tank;
An ammonia supply pipe having one end connected to the storage material tank and the other end connected to the inlet of the reaction tube;
The plurality of storage tanks contain different kinds of solid ammonia storage materials, respectively. 4. The apparatus according to claim 3, wherein the one end of the ammonia supply pipe is branched in parallel into a plurality of pipes, and each of the plurality of storage material tanks is connected to each of the pipes branched in parallel into the plurality of pipes. . The on-off valve, the flow rate control valve, the pressure control valve, or a combination of two or more thereof is provided in the middle of each of the plurality of pipelines branched in parallel in the ammonia supply pipe. Equipment. An inert gas source;
An inert gas supply pipe having one end connected to the inert gas supply source, the other end branched in parallel to each other, and each of the plurality of parallel branched branches connected to each of the plurality of storage material tanks; ,
And further comprising an on-off valve, a flow control valve, a pressure control valve, or a combination of two or more thereof provided in the middle of each of the pipes branched in parallel to the plurality of the inert gas supply pipes. An apparatus according to any one of claims 3 to 5, characterized in that 2. The apparatus according to claim 1, further comprising a control unit that controls the first and second heating units, the on-off valve, the flow rate control valve, the pressure control valve, or both. The apparatus according to claim 6. The apparatus according to claim 1, further comprising a cooling unit for cooling the inside of the storage material tank. The at least one cleaning liquid inlet that can be closed in an airtight state is provided in the middle of the ammonia supply pipe, and a third heating unit that heats the entire ammonia supply pipe is provided. The apparatus according to claim 1. The storage material tank is provided with another cleaning liquid inlet that can be closed in an airtight state, and a drainage port that can be closed in an airtight state at the bottom of the storage tank. The apparatus according to claim 9. The inert gas supply pipe is provided with another cleaning liquid injection port that can be closed in an airtight state, and a fourth heating unit that heats the entire inert gas supply pipe is provided, at the bottom of the storage material tank. The apparatus according to claim 1 or 6, wherein a drainage port that can be closed in an airtight state is provided.

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