KR960003130B1 - Catalyst deterioration apparatus for a motor car - Google Patents

Abstract

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Description

Automotive catalyst deterioration device

1 is a diagram of a conventional catalyst deterioration apparatus.

2 is a diagram of a catalyst deterioration apparatus according to the present invention.

3 is a diagram of a catalytic combustion device used in the catalytic deterioration device of the present invention.

4 is a schematic diagram of a bubbling humidifier, which is an embodiment of the humidifier used in the catalyst deterioration apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: gas inlet 2: gas outlet

3: ageing furnace 4: mass flow controller

5: catalytic combustion device 6: humidification device

7: H ₂ O sensor 8: Main controller

9: combustion gas injection device 10: catalytic combustion chamber

11: spark floc 13: ultrasonic humidifier

14: bubbling humidifier 15: solenoid valve

16: bypass valve 17: thermostat

18: distilled water

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalyst deterioration apparatus for automobiles, and more particularly, to a catalyst deterioration apparatus for automobiles having an excellent purification performance and an efficient humidification effect of harmful gases used as a deterioration medium by including a catalytic combustion apparatus and a humidification apparatus. It is about.

Automobile exhaust gas has recently emerged seriously in terms of environmental problems. The exhaust gas mainly consists of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NOx). Carbon monoxide is the bonding force between the hemoglobin is 300 times of the oxygen reduces the hemoglobin in the blood, the hydrocarbon is to cause the photochemical reaction in the atmosphere and damage the skin, mucosa and eyes, a nitrogen oxide is by very unstable, the NO ₂ is oxidized in the atmosphere And harm the human body.

Therefore, in order to purify automobile exhaust gas composed of carbon monoxide, hydrocarbons and nitrogen oxides, catalytic converters have been installed in automobile exhaust systems to reduce the pollution of the gas emitted into the atmosphere.

One of the methods of purifying the exhaust gas by installing a catalytic converter in an automobile exhaust system, which is composed of a noble metal which catalyzes in the middle of an automobile exhaust pipe such as platinum + rhodium (Rh) or platinum + rhodium + palladium A catalytic converter is provided to purify the exhaust gas by oxidizing and reducing harmful CO, HC, and NOx in the exhaust gas into harmless CO ₂ , H ₂ O, and N ₂ as the exhaust gas passes through the catalytic converter.

As an example, US Pat. No. 4,833,114 describes an improved process using a palladium catalyst to purify automobile exhaust.

However, at this time, it has always been a problem that the catalyst is thermally or chemically degraded to shorten its life.

In order to solve the above problems, for example, US Patent No. 5,163, 289 proposes a system for maintaining exhaust gas below a temperature at which deterioration of a catalytic converter is increased by installing an insulation exhaust pipe in an automobile exhaust system.

In addition, in order to evaluate the deterioration of the catalytic converter, US Patent No. 5,018,348 provides a method for measuring the state of the catalytic converter by installing two oxygen probes inside the catalytic converter, US Patent No. 5,255,515 In the following, a method of evaluating deterioration of the catalyst was proposed by installing gas probes at a portion slightly forward from the inlet of the catalytic converter and at a portion slightly rearward from the outlet of the catalytic converter.

However, there is a problem that it takes a considerable time and expense to evaluate the degradation of the catalyst applied to the actual engine and automobile by the above-described method.

Therefore, in order to evaluate the rapid and economical durability of the catalyst, the catalyst deterioration apparatus has been artificially provided with a condition corresponding to the actual operating time to deteriorate the catalyst. For example, the deterioration of 50,000 miles, which corresponds to 3 to 4 months of continuous running, can be achieved in 2 to 3 days by the deterioration device during the dynamometer test of the automobile.

Conventional catalyst deterioration device is composed of a heating section for thermally deteriorating the catalyst and a device for chemically degrading the catalyst, thereby maintaining the temperature higher than the operating temperature of the catalyst to thermally damage the carrier and the catalyst, and improve the performance of the catalyst The gas or the like that was lowered was flowed through a high temperature carrier to damage the carrier and the catalyst to evaluate durability.

However, when the above-described conventional catalyst deterioration apparatus is used, since the harmful gas used for the catalyst deteriorator passes through the carrier and is released into the atmosphere as it is, the gas itself becomes a secondary pollution source and is also incorporated in the automobile. In the actual operation, the catalytic changer is generating moisture during combustion. However, since the water supply device is not attached to the conventional deterioration device, there is a problem of providing an atmosphere different from the actual use environment.

Accordingly, the present invention is to attach the catalytic combustion device and the humidifier to the conventional catalyst deterioration device in order to eliminate the above-mentioned problems to purify the harmful gas discharged into the atmosphere, to provide an environment similar to the environment of the actual engine exhaust gas The purpose.

In order to achieve the above object, the catalytic deterioration apparatus of the present invention includes a mass flow controller for controlling a gas flowing through a gas inlet, and also a heating furnace for thermally or chemically deteriorating the gas. And a catalytic combustion device for purifying the gas by igniting and burning the gas discharged from the deterioration furnace.

The present invention also provides a humidifier between the gas inlet and the deterioration furnace, and installs a H ₂ O sensor between the deterioration furnace and the catalytic combustion device, and controls the humidification amount of the humidification apparatus by using the H ₂ O sensor. It further has a controller.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing the structure of a conventional catalyst deterioration apparatus, in which a gas flowing through the gas inlet 1 passes through a deterioration furnace 3 for thermally or chemically deteriorating the catalyst through the gas outlet 2. Discharged to the air. At this time, since the exhaust gas contains carbon monoxide, hydrocarbons, and nitrogen oxides, it provides a source of environmental pollution. Also, when the vehicle is actually driven, moisture is generated during combustion. It offers a different atmosphere than the environment.

2 is a diagram showing the configuration of the catalyst deterioration apparatus according to the present invention, wherein the mass flow controller 4 is disposed between the gas inlet 1 and the deterioration furnace 3 of the conventional catalyst deterioration apparatus shown in FIG. It is installed to control the amount of gas flowing in, and to install the catalytic combustion device (5) in the rear of the gas outlet (2) to purify the gas discharged from the deterioration furnace (3).

In addition, a humidifier 6 is installed between the gas inlet 1 and the deterioration furnace 3 to provide moisture to the inlet gas, and the humidifier 6 is connected to the deterioration furnace 3 by the main controller 8. Ultrasonic humidifier or bubbling humidifier is used.

In addition, an H ₂ O sensor 7 is installed in front of the catalytic combustion device 5 to sense the moisture content of the gas discharged from the deterioration furnace 3.

FIG. 3 shows the configuration of the catalytic combustion device shown in FIG. 2, wherein the catalytic combustion device includes a combustion gas injection device 9 for injecting combustible gas 19 such as methane, LPG, propane, and the like. The gas 19 and the inlet gas 20 are mixed and composed of a catalytic combustion chamber 10 having a catalytic converter 12 and a spark floc 11 for igniting the combustible mixed gas 21. At this time, the inflow of the combustible gas is performed by opening the solenoid valve 15 by the main big controller 8 shown in FIG.

4 shows the configuration of a bubbling humidifier, which is an embodiment of the humidifier used in the catalyst deterioration apparatus of the present invention. By-pass valve 16 is provided in the passage of the gas as shown, and a part of the gas flowing into the deterioration furnace 3 shown in FIG. 2 is selectively introduced into the bubbling humidifier 14. . At this time, the introduced gas passes through the distilled water 18 contained in the thermostat 17, so that the saturated steam corresponding to the set temperature of the thermostat 17 together with the gas deterioration furnace (3) of FIG. Flows into).

Referring to the operation of the catalytic deterioration device of the present invention in more detail as follows. First, as shown in FIG. 2, when the deterioration furnace 3 is heated and then the gas controlled by the mass flow controller 4 flows into the operating space of the deterioration furnace 3 through the gas inlet 1, The catalytic combustion device 5 located at the rear of the gas outlet 2 is ignited to ignite the exhaust gas. At this time, the ignition of the catalytic combustion device 5 opens the solenoid valve 15 by the electrical signal of the main controller 8 to inject combustible gas 19 such as methane, LPG, propane, etc. as shown in FIG. And ignite with the spark plug 11.

Next, the fire extinguishing of the catalytic combustion device 5 shown in FIG. 2 consists of closing the solenoid valve 15 by the main controller 8 to stop the inflow of the combustible gas.

Here, the excess of the water which flows in is performed by adjusting the humidifier 6 by the main controller 8. Here, the humidifier 6 uses a humidifier using an ultrasonic frequency or a bubbling humidifier of FIG. 4 using an amount of saturated steam according to temperature, and when the excess of moisture is controlled using a humidifier using an ultrasonic frequency. When controlling the frequency, and using the bubbling humidifier 14, as shown in FIG. 4, the bypass valve 16 selectively adjusts the gas introduced into the furnace 3 of the deterioration device of FIG. . At this time, the introduced gas passes through the distilled water 18 contained in the thermostat 17 which is incubated by the temperature controller, and saturated steam corresponding to the set temperature is introduced into the deterioration furnace 3 of the deterioration apparatus together with the inlet gas.

As described above, the catalyst deterioration apparatus of the present invention includes a catalytic combustion apparatus and a humidification apparatus, thereby preventing air pollution by harmful gases discharged by the catalyst deterioration experiment, and adjusting the humidification amount to the same as the actual operating conditions. Deterioration conditions can be made ethnic, and because the humidification by the thermostat has the effect of maintaining a constant temperature of the experimental gas flowing into the deterioration device.

Claims (8)

A mass flow controller 4 for controlling the amount of gas introduced through the gas inlet 1, a deterioration furnace 3 for thermally or chemically deteriorating the catalyst by the gas introduced through the gas inlet 1, and the And a catalytic combustion device (5) for purifying the gas discharged from the deterioration furnace (3) to the gas outlet (2). The humidifier (6), the deterioration furnace (3) and the catalytic combustion device (5) of claim 1, arranged between the gas inlet (1) and the deterioration furnace (3) to provide moisture to the inlet gas. It is disposed between, H ₂ O sensor 7 and is connected to the to the deteriorated (3) the H ₂ O sensors vented (7) is detected for detecting the moisture content of the exhaust gas discharged from said deteriorated 3 And a main controller (8) for controlling the humidifier (6) by comparing the amount of gas with the amount of water already set by the user. 3. The catalytic combustion device (5) according to claim 1 or 2, wherein the catalytic combustion device (5) mixes and mixes the combustion gas injection device (9) which injects the combustible gas by the main controller (8), and the combustible gas and the inflow gas. The catalyst deterioration apparatus for automobiles characterized by including a spark floc (11) for causing the gas to be ignited in the catalytic combustion chamber (10), and a catalyst controller (12) for purifying the ignited mixed gas. 3. The catalyst deterioration apparatus for automobile according to claim 2, wherein the humidifier (6) is an ultrasonic humidifier (13). 3. The catalyst deterioration apparatus for automobile according to claim 2, wherein the humidifier (6) is a bubbling humidifier (14). 3. The catalyst deterioration apparatus according to claim 2, wherein the main controller (8) controls the ignition and extinguishing of the catalytic combustion device (5) and the amount of humidification discharged from the humidification device (6). 4. The catalyst deterioration apparatus for automobiles according to claim 3, wherein the combustible gas injected from the combustion gas injection device (9) flows into or out of the catalytic combustion chamber (10) by opening and closing the solenoid valve (15). The thermostat of claim 5, wherein the bubbling humidifier (14) maintains a constant temperature at all times by the main controller (8) in order to provide a constant saturated water vapor to the dry inlet gas flowing from the gas inlet (1). (17), and the gas flowing into the thermostat 17 is selectively introduced, and after the gas passes through the distilled water 18 in the thermostat 17, it is discharged to the deterioration furnace (3) of the deterioration apparatus Catalytic deterioration device for cars comprising a bypass valve (16).