Aerosol system for measuring concentration of polycyclic aromatic hydrocarbons in atmospheric particulates

A technology for atmospheric particulate matter and polycyclic aromatic hydrocarbons, which is applied in the field of aerosol systems, can solve the problems of inability to collect and measure polycyclic aromatic hydrocarbons aerosols, single function, etc. Insufficient combustion effect

Pending Publication Date: 2019-04-09
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to simulate the reaction and transmission process of air pollutants produced in the open-air combustion of biomass, it is necessary to provide an environment with low temperature, low pressure, and continuous strong light radiation. However, due to the material

Method used

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  • Aerosol system for measuring concentration of polycyclic aromatic hydrocarbons in atmospheric particulates
  • Aerosol system for measuring concentration of polycyclic aromatic hydrocarbons in atmospheric particulates

Examples

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Effect test

Embodiment 1

[0047] An aerosol system for measuring the concentration of polycyclic aromatic hydrocarbons in atmospheric particulate matter, with a structure such as figure 1 As shown, it includes a connected combustion device for simulating open-air combustion of biomass, an aerosol smog box for simulating the emission of air pollutants into the atmosphere, and an AC-GCMS1000 VOCs adsorption and concentration online monitoring system37.

[0048] The combustion device comprises a combustion furnace shell 16 with one end open and the other end sealed. The combustion furnace shell is a cylindrical shell with a height of 1000 mm and an inner diameter of 750 mm. The cover 7 is provided with a sealing ring 8 between the opening end of the combustion furnace shell and the furnace cover. The opening end of the combustion furnace shell and the furnace cover are fixedly connected by the sealing clip 1. The furnace cover is in the shape of an inverted funnel, and the top funnel of the inverted funnel...

Embodiment 2

[0055] The test method of the aerosol system for measuring the concentration of polycyclic aromatic hydrocarbons in the atmospheric particulate matter described in Example 1 comprises the steps as follows:

[0056] 1) Weigh 5-15g of clean biomass, put it on the combustion net of the combustion device after drying and spread it out, turn on the air supply pump, input the air without particles into the furnace shell through the air supply transmission pipe, and turn on the flue gas analysis instrument, observe the spectrum and record CO, CO 2 The initial concentration of the biomass is ignited, and the CO and CO are given in real time by the flue gas analyzer during the biomass combustion process. 2 concentration value and calculate the combustion efficiency, and adjust the air supply flow rate through the air supply pump to ensure that the combustion efficiency of biomass is greater than or equal to 0.9;

[0057] 2) Vacuumize the aerosol smog box through the vacuum pump, so th...

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Abstract

The invention relates to an aerosol system for measuring a concentration of polycyclic aromatic hydrocarbons in atmospheric particulates. The aerosol system comprises a combustion device for simulating open burning of a biomass, an aerosol smog chamber for simulating an atmospheric pollutant to discharge to an atmosphere, and a particulate mass concentration measuring device, wherein the combustion device, the aerosol smog chamber and the particulate mass concentration measuring device are connected sequentially. The system provided by the invention simultaneously has three functions, and simulates the process of the open burning of the biomass to discharge the atmospheric pollutant accurately and authentically; the physicochemical reaction of the atmospheric pollutant, generated by open burning of crop straw, at each height of a convection layer or even an advection layer is simulated artificially, controllably and repeatedly; meanwhile, the influences of factors such as complex weather and terrain in an actual environment are eliminated; and efficient capture, concentration and concentration test of the polycyclic aromatic hydrocarbons in the atmospheric particulates in an atmospheric environment are simulated via an online monitoring system, so the purposes of accurately collecting, capturing, concentrating and testing the polycyclic aromatic hydrocarbons in the atmosphericparticulates are achieved.

Description

technical field [0001] The invention relates to an aerosol system for measuring the concentration of polycyclic aromatic hydrocarbons in atmospheric particles. Background technique [0002] As a large agricultural country in the world, China ranks first in the world in the possession of crop stalks. According to statistics, more than 20% of the crop stalks are directly burned in the open air. Atmospheric aerosols produced by the open-air burning of crop straws play an important role in the deterioration of environmental quality (such as the formation of smog) and the reduction of visibility, and will participate in atmospheric transport and chemical processes. Their special optical properties and chemical composition affect the surface radiation. It can directly or indirectly affect the climate and gas-liquid circulation as cloud condensation nuclei; in addition, the atmospheric aerosols produced by the open-air burning of crop straws have significant inhalation toxicity, wh...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N15/06G01N31/12
CPCG01N15/00G01N15/0618G01N31/12
Inventor 陈建民孙剑峰朱超李庆李凌
Owner FUDAN UNIV
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