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Atmospheric aerosol smoke system for measuring chemical components of particulate matters

A technology for atmospheric aerosols and particulates, applied in particle suspension analysis, chemical analysis by combustion, measuring devices, etc., can solve problems such as single function and inability to test the chemical composition of particulates, and achieve simple operation and maintenance, avoid insufficient combustion, The effect of long burning time

Inactive Publication Date: 2019-04-09
FUDAN UNIV
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  • Summary
  • 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 and structure of the existing atmospheric aerosol smoke boxes (mostly FEP -Teflon film) limitations cannot be realized. In addition, the existing atmospheric aerosol smog chamber has a single function and cannot test the chemical composition of particulate matter.

Method used

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  • Atmospheric aerosol smoke system for measuring chemical components of particulate matters

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Embodiment 1

[0045] An atmospheric aerosol smog system for measuring the chemical composition of particulate matter, structured as figure 1 As shown, it includes a connected combustion device for simulating open-air burning of biomass, an aerosol smog chamber for simulating the emission of air pollutants into the atmosphere, and online particle chemical composition mass spectrometry37.

[0046] 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 shape The mouth is connected with the gas transmiss...

Embodiment 2

[0053] Embodiment 1 The application method of the atmospheric aerosol smog system for measuring the chemical composition of particulate matter, comprising the following steps:

[0054] 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;

[0055] 2) Vacuumize the aerosol smog box through the vacuum pump, so that the pressure inside the aer...

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Abstract

The invention relates to an atmospheric aerosol smoke system for measuring chemical components of particulate matters. The system comprises a burning device for simulating open burning of biomass, anaerosol smoke box for simulating a process of discharging atmospheric pollutants into the atmosphere, and an online particulate matter chemical component mass spectrum, which are connected in sequence; the atmospheric aerosol smoke system has three functions at the same time, and stimulates the process of discharging the atmospheric pollutants in the open burning of the biomass accurately and really; the physical and chemical reactions of the atmospheric pollutants generated in open burning of crop straws at all heights of the troposphere and even the stratosphere can be simulated in an artificially controllable and repeatable manner, and meanwhile, the influence of complex weather, terrains and other factors in the actual environment is eliminated; and through the online particulate matter chemical component mass spectrum, the mass concentration and the chemical composition of non-refractory components in the particulate matters of 0.04-1.0 micron are tested, comprehensive analysis and testing of the mass concentration and the chemical composition of the non-refractory components in the particulate matters of 0.04-1.0 micron are achieved, and a test result is accurate and reliable.

Description

technical field [0001] The invention relates to an atmospheric aerosol smog system for measuring chemical components of particulate matter. 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, which also affects the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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