An exhaust gas treatment device for an aircraft engine test bench

Abstract

The utility model discloses an aircraft engine test bench tail gas treatment device, which comprises an intake section, an electric heater installation section, a catalyst installation section, an adsorbent installation section and an exhaust section which are connected in sequence, the outer end of the intake section is used to be connected to the engine tail gas exhaust port; an exhaust device is provided on the connecting pipeline between the catalyst installation section and the adsorbent installation section, and the exhaust port of the exhaust device faces the adsorbent installation section. The utility model solves the technical problems that the test bench has large exhaust resistance and the exhaust temperature cannot reach the effective temperature of the catalyst.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation engines, and in particular relates to an exhaust gas treatment device for an aviation engine test bench. Background Art

[0002] During the development and delivery phases of aircraft engines, whole-machine tests are required. The test process uses aviation kerosene, which is composed of hydrocarbons of different fractions of alkanes, aromatics, and olefins. During the combustion process of aviation fuel, its final combustion products mainly include carbon dioxide, water, etc., as well as unburned hydrocarbons, nitrogen oxides (NO x ), carbon monoxide, etc., produce black smoke and pungent odor, affecting the surrounding environment.

[0003] Traditional exhaust gas treatment devices will increase the exhaust resistance of the test bench, and in the early stage of the test bench test, the exhaust temperature cannot reach the effective temperature of the catalyst, resulting in hydrocarbon emissions into the environment. Utility Model Content

[0004] In view of the current technical problems, the utility model aims to provide an exhaust gas treatment device for an aircraft engine test bench, which can solve the technical problems that the exhaust resistance of the test bench is large and the exhaust temperature cannot reach the effective temperature of the catalyst.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An aircraft engine test bench exhaust gas treatment device has the following structural features: it comprises an air intake section, an electric heater installation section, a catalyst installation section, an adsorbent installation section and an exhaust section which are connected in sequence, the outer end of the air intake section is used to be connected to the engine exhaust port; an exhaust device is provided on the connecting pipeline between the catalyst installation section and the adsorbent installation section, and the exhaust port of the exhaust device faces the adsorbent installation section.

[0007] During the start-up phase of the aircraft engine test, the electric heater installation section is started in advance to heat the air so that the temperature in the exhaust gas treatment device reaches the optimal catalytic temperature. The exhaust device is started to ensure that the pressure of the intake section is less than 200Pa. The aircraft engine exhaust gas enters the electric heater installation section through the intake section, and the exhaust gas reaches the optimal catalytic temperature after heating. The heated exhaust gas enters the catalyst installation section, and the exhaust gas is catalytically oxidized into carbon dioxide and water under the action of the catalyst, and then purified by the adsorbent installation section and discharged into the atmosphere through the exhaust section. The adsorbent installation section absorbs the hydrocarbons that are not completely purified in the exhaust gas. The exhaust gas treatment device of the aircraft engine test bench of the utility model reduces the pressure of the intake section through the exhaust device to ensure that the exhaust gas of the aircraft engine is unobstructed, and increases the exhaust temperature through electric heating to ensure that the catalyst is at the optimal working temperature, thereby greatly improving the effect of exhaust gas treatment. The exhaust gas treatment device of the aircraft engine test bench of the utility model modularizes each functional section for easy disassembly and maintenance.

[0008] Preferably, a back-blowing device installation section is provided between the catalyst installation section and the exhaust device, and the exhaust port of the back-blowing device installation section faces the catalyst installation section; a first interface is provided on the back-blowing device installation section, and the first interface is used to communicate with an external air source. After the aircraft engine test is completed, the external air source is turned on, the back-blowing device installation section is started, and compressed air is used to back-blow the catalyst in the catalyst installation section through the first interface and the back-blowing device to blow out the pollutants in the catalyst, thereby improving the catalyst efficiency.

[0009] Preferably, a smoke collecting section is provided between the electric heater installation section and the catalyst installation section. The smoke collecting section is provided to collect pollutants in the catalyst.

[0010] Specifically, a hopper is provided at the bottom of the smoke collecting section, and the hopper is connected to the smoke collecting section; a valve is provided at the bottom of the hopper. After the aircraft engine test is completed, the valve at the bottom of the hopper is opened, and the pollutants in the smoke collecting section are discharged through the hopper.

[0011] Preferably, a pressure sensor is provided on the air intake section.

[0012] Preferably, the pressure sensor is electrically connected to the air suction device. The wind force of the air suction device is controlled by the pressure detected by the pressure sensor, so that the pressure of the air intake section is less than 200Pa.

[0013] Preferably, a temperature sensor is provided on the connecting pipeline between the electric heater installation section and the catalyst installation section.

[0014] Preferably, the temperature sensor is electrically connected to the electric heater of the electric heater installation section. The opening of the electric heater of the electric heater installation section is controlled by the temperature detected by the temperature sensor, so that the temperature in the device reaches the optimal catalytic temperature.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The exhaust gas treatment device of the aircraft engine test bench of the utility model reduces the pressure of the air intake section through the exhaust device to ensure smooth exhaust of the aircraft engine exhaust gas, increases the exhaust temperature through electric heating to ensure that the catalyst is at the optimal working temperature, thereby greatly improving the effect of exhaust gas treatment.

[0017] 2. The exhaust gas treatment device of the aircraft engine test bench of the utility model modularizes each functional section to facilitate disassembly, assembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of the exhaust gas treatment device of the aircraft engine test bench.

[0019] In the figure:

[0020] 1-air intake section, 2-electric heater installation section, 3-smoke collection section, 4-catalyst installation section, 5-backflush device installation section, 6-exhaust device, 7-adsorbent installation section, 8-exhaust section, 9-pressure sensor, 10-temperature sensor, 11-first interface, 12-hopper. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0022] like Figure 1 As shown, an aircraft engine test bench exhaust gas treatment device of this embodiment includes an intake section 1, an electric heater installation section 2, a smoke collection section 3, a catalyst installation section 4, a backflush device installation section 5, an adsorbent installation section 7 and an exhaust section 8 which are connected in sequence, and the outer end of the intake section 1 is connected to the exhaust port of the engine exhaust gas. An exhaust device 6 is provided on the connecting pipeline between the catalyst installation section 4 and the adsorbent installation section 7, and the exhaust port of the exhaust device 6 faces the adsorbent installation section 7. A pressure sensor 9 is provided on the intake section 1, and the pressure sensor 9 is electrically connected to the exhaust device 6. A temperature sensor 10 is provided on the smoke collection section 3, and the temperature sensor 10 is electrically connected to the electric heater of the electric heater installation section 2. A hopper 12 is provided at the bottom of the smoke collection section 3, and the hopper 12 is connected to the smoke collection section 3, and a valve is provided at the bottom of the hopper 12. The exhaust port of the back-blowing device installation section 5 faces the catalyst installation section 4 . The back-blowing device installation section 5 is provided with a first interface 11 , which is connected to an external air source.

[0023] The exhaust gas treatment method of the aircraft engine test bench of this embodiment comprises the following steps:

[0024] Step S1, during the start-up phase of the aircraft engine test, the electric heater installation section 2 is started in advance to heat the air so that the temperature in the aircraft engine exhaust treatment device reaches the optimal catalytic temperature;

[0025] Step S2, according to the pressure detected by the pressure sensor 9 on the air intake section 1, the wind force of the exhaust device 6 is controlled to ensure that the pressure in the air intake section 1 is less than 200Pa; the tail gas of the aircraft engine enters the electric heater installation section 2 through the air intake section 1, and after the tail gas reaches the optimal catalytic temperature after being heated, it enters the catalyst in the catalyst installation section 4 for catalytic oxidation into carbon dioxide and water, and then passes through the backflush device installation section 5, the exhaust device 6, the adsorbent installation section 7, and the exhaust section 8, and the tail gas is discharged into the atmosphere after purification; wherein, the adsorbent installation section 7 is used to absorb hydrocarbons that are not completely purified in the tail gas;

[0026] Step S3, during the normal operation phase of the aircraft engine, the pressure and temperature of the exhaust gas discharged by the aircraft engine can ensure that the exhaust gas is normally purified and discharged into the atmosphere, the electric heater installation section 2 and the exhaust device 6 are turned off and started, and the exhaust gas of the aerospace engine enters the treatment device through the air intake section 1 for exhaust gas treatment;

[0027] Step S4, after the aircraft engine test is completed, start the back-blowing device installation section 5, connect the external air source, open the valve at the bottom of the hopper 12, and use the compressed air to back-blow the catalyst in the catalyst installation section 4 through the first interface 11 and the back-blowing device installation section 5, and blow the pollutants in the catalyst into the smoke collecting section 3. The pollutants are discharged through the hopper 12 on the smoke collecting section 3, thereby ensuring the catalyst efficiency.

[0028] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. An aircraft engine test bench exhaust gas treatment device, characterized in that: The invention comprises an air intake section (1), an electric heater installation section (2), a catalyst installation section (4), an adsorbent installation section (7) and an exhaust section (8) which are connected in sequence, wherein the outer end of the air intake section (1) is used to be connected to the exhaust port of the engine tail gas; an exhaust device (6) is provided on the connecting pipeline between the catalyst installation section (4) and the adsorbent installation section (7), and the exhaust port of the exhaust device (6) faces the adsorbent installation section (7).

2. The exhaust gas treatment device for an aircraft engine test bench according to claim 1, characterized in that: A back-blowing device installation section (5) is provided between the catalyst installation section (4) and the exhaust device (6), and the exhaust port of the back-blowing device installation section (5) faces the catalyst installation section (4); a first interface (11) is provided on the back-blowing device installation section (5), and the first interface (11) is used to communicate with an external air source.

3. The exhaust gas treatment device for an aircraft engine test bench according to claim 2, characterized in that: A smoke collection section (3) is provided between the electric heater installation section (2) and the catalyst installation section (4).

4. The exhaust gas treatment device for an aircraft engine test bench according to claim 3 is characterized in that: A hopper (12) is provided at the bottom of the smoke collecting section (3), the hopper (12) is connected to the smoke collecting section (3), and a valve is provided at the bottom of the hopper (12).

5. The exhaust gas treatment device for an aircraft engine test bench according to claim 1, characterized in that: The air intake section (1) is provided with a pressure sensor (9).

6. The exhaust gas treatment device for an aircraft engine test bench according to claim 5, characterized in that: The pressure sensor (9) is electrically connected to the air suction device (6).

7. The exhaust gas treatment device for an aircraft engine test bench according to claim 1, characterized in that: A temperature sensor (10) is provided on the connecting pipeline between the electric heater installation section (2) and the catalyst installation section (4).

8. The exhaust gas treatment device for an aircraft engine test bench according to claim 7, characterized in that: The temperature sensor (10) is electrically connected to the electric heater of the electric heater installation section (2).

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