A mixed aerosol generator for simulating diesel engine exhaust particle flow

Abstract

The invention discloses a mixed aerosol generating device simulating diesel exhaust particulate flow. A dissolved organic matter generating device is arranged based on a carbon black aerosol generating device, and an ash aerosol generating device has three sections, namely the mixed solution generating section, the mixed solution evaporating section and the ash aerosol dilution and deposition section; in the mixed solution generating section, an ash containing cup, a distilled water containing cup and a mixed solution containing cup are connected, and an outlet of a mixed solution stirrer is connected with a mixed solution filter net, a hopper, a filtered solution containing cup, a filtered solution stirrer, a stirrer valve, an ejector T-joint and a solution ejector in sequence; in the mixed solution evaporating section, the ejector T-joint is connected to the solution ejector, and the solution ejector is connected with a mixing pipe, a heating wire pipe and a heating wire pipe T-joint in sequence; in the ash aerosol dilution and deposition section, the heating wire pipe T-joint is connected with an air filter, a second float flowmeter and one inlet of a dilution section T-joint in sequence. The mixed aerosol generating device is simple in structure, and mixed aerosol generating concentration is controlled in multiple regulating ways so as to better simulate diesel exhaust particulate flow.

Description

technical field [0001] The invention relates to the field of diesel engine vehicle tail gas treatment devices, in particular to a mixed aerosol generating device for simulating diesel engine exhaust particle flow. Background technique [0002] Diesel engine has high thermal efficiency and economy, low CO 2 Emissions and other advantages are widely used in the transportation industry. However, its particulate matter emission is large (the emission is 30 to 80 times that of a gasoline engine with the same displacement), which will cause serious pollution to the environment. Strict emission standards require effective and reliable technologies to reduce particulate matter emissions. From the perspective of control technology, it is difficult to meet the current emission standards only by internal purification of diesel engines and improvement of fuel quality. At present, diesel engines that meet the "National IV" emission regulations generally need to adopt after-treatment t...

AI Technical Summary

Problems solved by technology

Among them, the RBG series dust aerosol generating device of German PALAS company uses a rotating brush to uniformly remove a certain amount of powder to generate aerosols. Its concentration is stable and can be effectively used to generate carbon black aerosols. For quality reasons, it is easy to precipitate after directly using ash and gas to form an aerosol, so the method of using a dust aerosol generator to generate ash aerosol cannot achieve a good ash suspension effect

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