What Are Flue Gases?

Smoke is a mixture of gas and soot, which is the main reason for polluting the atmosphere in residential areas. The composition of flue gas is very complicated. The gas includes water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, and nitrogen oxides. Smoke and dust include fuel ash, coal particles, oil droplets, and pyrolysis products.

The pollution of soot to the air is closely related to meteorological conditions.

The harm to the human body depends on the composition, concentration, duration, and location of the pollutants on the one hand, and the sensitivity of the body on the other. High smoke concentrations can cause

Current methods for monitoring and analyzing smoke pollutants include the use of portable

GB13271-91 "Boiler Air Pollutant Emission Standard"

GB9078-1996 "Emission Standard of Air Pollutants for Industrial Furnaces"

GB13223-2011 "Emission Standard of Air Pollutants for Thermal Power Plants"

GB16171-1996 "Emission Standard of Air Pollutants for Coking Ovens"

GB4915-1996 "Emission Standard of Air Pollutants for Cement Plants"

Smoke toxicity

Flue gas contains a lot of toxic gases (CO, CO ₂ )

When the content of CO ₂ in the air is as high as 7-10%, people will lose consciousness within a few minutes and even die. If the content of CO in the air reaches 1%, human poisoning can result in 1-2 minutes.

The oxygen content in the smoke is lower than the value needed by people to be physiologically normal

When the oxygen content is reduced to 15%, the muscle activity of a person is reduced;

When the oxygen content is between 10% and 14%, the person will have weakness in the limbs and cannot distinguish the direction;

When the oxygen content drops to 6% -10%, a person will faint;

When the oxygen content is lower than 6%, a person will die in a short time.

The suspended particles in the smoke are also harmful. Due to the gas diffusion effect, the floating particles with smaller particle size in the suspended particles can enter the human lungs and adhere to the alveolar wall, which can be sent to the whole body with the blood, causing respiratory diseases.

Smoke reduction

Smoke particles are opaque to visible light, that is, they have a complete shielding effect on visible light. When diffused, visible light is greatly weakened by the shielding of smoke particles, and visibility is greatly reduced.

Smoke horror

When a fire breaks out, the thick billowing smoke creates a sense of horror, often confuses evacuation, and even causes people to lose their senses and panic. ^[3]