Diluting, sampling and testing equipment for combustion chamber tail gas smoke

Abstract

The invention provides a diluting, sampling and testing equipment for combustion chamber tail gas smoke by analyzing particulate matter sampling methods at home and abroad, particularly analyzing theoretical methods for sampling particulate matter in tail gas of an aero-engine, so as to research the combustion smoke performance of fuel oil. The whole equipment consists of a dilution sampling system and a combustor, wherein the dilution sampling system is divided into five subsystems, namely a flue gas collecting system, a clean air generating system, a Venturi mixer, a staying chamber and a sampling system. The equipment does not need to pay attention to the influence of various parameters of the flue gas on a sampling instrument, so that a test path is simplified; the real change process after the high-temperature flue gas enters the atmospheric environment is simulated, and the comprehensive characteristic is realized; and in addition, no over-emission test is carried out on the non-volatile particulate matters discharged by the aero-engine by using the technology like abroad at present in China.

Description

technical field [0001] The invention relates to equipment related to the fields of exhaust smoke samples and diluted sampling, in particular to a kind of equipment for sampling and testing equipment for the dilution and sampling of exhaust smoke from combustion chambers. Background technique [0002] In the early days, particulate matter sampling was mainly through direct sampling, that is, the method of flue gas passing directly through the filter membrane, such as: EPA Method 5, EPA Method 17, EPA Method 201 / 201A, EPA Method 202 of the US Environmental Protection Agency (EPA); international The test method specified in Annex 16 of the Civil Aviation Organization; the national standard GB / T16157-1996 method for the determination of particulate matter in the exhaust of stationary pollution sources and the sampling method for gaseous pollutants. This measurement method is only suitable for occasions where coal or wood is not easy to form excessively high temperatures and the ...

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Problems solved by technology

This measurement method is only suitable for occasions where coal or wood is not easy to form excessively high temperatures and the exhaust velocity is low; for liquid-fueled aeroengines, the exhaust velocity of combustion smoke is fast, the composition is complex, and the temperature is high. The gaseous substances in the high-temperature flue gas cannot be quickly transformed into a solid state, resulting in a direct loss of primary condensed particles. In addition, the filter cartridge dust collection device used for direct sampling is not conducive to the collection of particles

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