System and method for separating and extracting soot generated by coal and biomass

Abstract

The invention discloses a system and a method for separating and extracting soot generated by coal and biomass. The method comprises the following steps: heating a sampling gun unit, a cyclone cutter, a soot filter and a connecting pipe to 250 to 350 DEG C; putting the sampling gun unit into a flue of the coal and the biomass during heat utilization, and carrying out isokinetic sampling; preliminarily collecting the soot in flue gas on a filter membrane of the soot filter, scraping down initial soot, and adding a collected soot sample into an alcohol solution, and carrying out ultrasonic treatment and standing; pouring upper-layer liquid in a test tube into a crucible, and carrying out vacuum drying to obtain purified soot. The method for separating and extracting the soot in the flue gas generated by heat utilization of solid fuels such as the coal and the biomass, disclosed by the invention, can be used for quantitatively measuring the concentration of the soot in the flue gas. Solid particles of the purified soot can be used for medical and climatic environmental studies, and are of great significance to promote PM2.5 and chemical components thereof to effect human health and environment.

Description

technical field [0001] The invention relates to the field of environmental detection, in particular to a system and method for separating and extracting soot produced by coal and biomass. Background technique [0002] Soot is a kind of black carbonaceous particles, produced in the process of incomplete combustion of carbon-containing fuels, and is an important component of atmospheric fine particles, especially in heavily polluted weather. Due to the reason of energy structure in our country, energy consumption is mainly based on solid fuels such as coal and biomass. The 2016 Statistical Bulletin released by the National Bureau of Statistics shows that coal accounted for 64% of China's energy consumption in 2016, which is the lowest in history, but it is still the dominant fuel for my country's energy consumption. In addition, in the vast rural areas of our country, it is very common to use straw and firewood as fuel for cooking and heating, and the phenomenon of open burni...

AI Technical Summary

Problems solved by technology

It is difficult to separate the components, especially coke particles, both of which are carbonaceous particles, but have completely different formation mechanisms, resulting in the inability to obtain relatively pure soot particles, making existing research unable to focus on this important Particle components are studied separately

Although the thermo-optic transmission method (TOR) can measure various carbon components of the particles on the filter membrane, this method is a destructive analysis and the test requires expensive instruments

At present, there is no effective method to separate soot from other particulate matter components without destroying the molecular structure of soot

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