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Atmospheric aerosol smog system capable of measuring anion and cation concentration of water-soluble particulate matter

A technology for atmospheric aerosols and water-soluble particles, which is applied in the direction of measuring devices, particle suspension analysis, material separation, etc., can solve problems such as the inability to measure the concentration of anions and cations in water-soluble particles, so as to avoid insufficient combustion, avoid smoldering, The effect of long burning time

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

AI Technical Summary

Problems solved by technology

In order to simulate the reaction and transmission process of atmospheric 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 can not be realized, in addition, the existing atmospheric aerosol smog box can not measure the anion and cation concentration of water-soluble particulate matter

Method used

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  • Atmospheric aerosol smog system capable of measuring anion and cation concentration of water-soluble particulate matter
  • Atmospheric aerosol smog system capable of measuring anion and cation concentration of water-soluble particulate matter

Examples

Experimental program
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Effect test

Embodiment 1

[0051] An atmospheric aerosol smog system that can measure the anion and cation concentration of water-soluble particulate matter, the structure is as follows figure 1 As shown, it includes a combustion device for simulating open-air combustion of biomass, an aerosol smog box for simulating the emission of air pollutants into the atmosphere, and a device for measuring the ion concentration of water-soluble particulate matter connected in sequence;

[0052] The combustion device for simulating biomass open-air combustion includes 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. A furnace cover 7 is provided at the center, and a sealing ring 8 is arranged between the open end of the combustion furnace shell and the furnace cover. The open end of the combustion furnace shell and the furnace cover are fixedly connected by a sealing clip 1. The shap...

Embodiment 2

[0060] The application method of embodiment 1 comprises steps as follows:

[0061] 1) Weigh 10g 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 air without particulate matter into the furnace shell through the air supply transmission pipe, turn on the flue gas analyzer, 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;

[0062]2) Vacuumize the aerosol smog box through the vacuum pump, so that the pressure inside the aerosol smog box reaches 8-12Pa, turn off the vacuum pump, open the check valve on the air pollutant input pipe, and p...

experiment example

[0069] Experimental example: the system of embodiment 1 measures the chemical composition of PM2.5 released by combustion aerosol

[0070] Using the device of Example 1, with reference to the method of Example 2, the rice, wheat, corn, soybean, and cotton stalks were respectively simulated open-air burning and discharging, and the air supply flow rate was 9L / min, and the ion concentration of the anion and cation of the water-soluble particulate matter was tested. The concentrations of water-soluble anions and cations in the five biomass straw combustion aerosols were measured, as shown in Table 1.

[0071] Table 1 The chemical composition of PM2.5 released by five kinds of biomass straw combustion aerosols

[0072]

[0073] It can be seen from Table 1 that the particulate matter emitted by the open burning of rice, wheat, corn, soybean, and cotton stalks contains 10 kinds of anions and cations respectively, and the composition contents are all different, which provides a go...

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Abstract

The invention relates to an atmospheric aerosol smog system capable of measuring the anion and cation concentration of a water-soluble particulate matter. The system comprises a combustion device, anaerosol smog box and a water-soluble particulate matter ion concentration measurement device, wherein the combustion device, the aerosol smog box and the water-soluble particulate matter ion concentration measurement device are connected in sequence; the combustion device is used for simulating biomass open-air combustion; and the aerosol smog box is used for simulating a situation that air pollutants are discharged into air. The atmospheric aerosol smog system capable of measuring the anion and cation concentration of the water-soluble particulate matter simultaneously has three functions, and can accurately and truly simulate a process that air pollutants are discharged by the biomass open-air combustion; the physical chemistry reaction of the air pollutants generated by crop straw open-air combustion at each height in a convection zone even in a stratosphere can be manually controllable and are repeatedly simulated, meanwhile, the influence of factors, including complex meteorology,terrains and the like, in the practical environment can be eliminated, and in addition, the concentration of water-soluble anions and cations in the particulate matter generated by biomass combustionin the simulation environment can be accurately obtained.

Description

technical field [0001] The invention relates to an atmospheric aerosol smog system capable of measuring the anion and cation concentrations of water-soluble 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 toxi...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N15/06G01N31/12G01N30/96
CPCG01N15/00G01N15/0618G01N30/96G01N31/12
Inventor 陈建民孙剑峰朱超李庆李凌
Owner FUDAN UNIV
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