Pressure-adjustable double layer smog chamber

Abstract

The invention discloses a pressure-adjustable double layer smog chamber, which can be used to adjust the pressure of photochemical reaction. The smog chamber comprises a photochemical reacting chamber, a regulating and controlling chamber, a temperature controlling system, an air circulating system and a sample analyzing system. The main body of the smog chamber is structured in double layers, the outer layer is made of rigid transparency material; the inner layer is made of transparency material; the regulating and controlling chamber is a space between the outer layer and inner layer; the regulating and controlling chamber is provided with a scavenging valve; and the photochemical reacting chamber is a space encircled by the inner layer and is provided with a scavenging valve and a sampling opening. The outer layer regulating and controlling chamber can protect the inner layer photochemical reacting chamber and prevent the gas in the reacting chamber from being polluted. The double layer smog chamber provided in this invention can adjust the pressure of the photochemical reaction, accurately control the experiment condition, and increase the repeatability of the experiment and reliability of the experiment result.

Description

technical field [0001] The invention relates to a smoke box, in particular to a double-layer smoke box capable of adjusting the pressure conditions of photochemical reactions. Background technique [0002] Photochemical smog is primary pollutants such as hydrocarbons and nitrogen oxides discharged into the atmosphere by pollution sources such as automobiles and factories. Under the action of sunlight, chemical reactions occur to generate secondary pollutants such as ozone, aldehydes, ketones, acids, and peroxyacetyl nitrate. Secondary pollutants, the smog pollution phenomenon formed by the mixture of primary pollutants and secondary pollutants participating in the photochemical reaction process is called photochemical smog. [0003] In order to understand the mechanism of photochemical reactions, scientific research institutions at home and abroad have generally carried out experimental studies using photochemical smog chambers to simulate atmospheric photochemical reactions...

AI Technical Summary

Problems solved by technology

However, since the emission spectrum of artificial light sources cannot be the same as that of sunlight in all bands, there is a deviation between the measured photochemical reaction rates and the reaction rates obtained under sunlight.

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