Chemical waste gas composition
The waste gas produced by chemical plants is generally divided into three categories:
(1) sulfur compounds, such as hydrogen sulfide, mercaptan, dimethyl sulfur, thioether and heterocyclic sulfur compounds;
(2) nitrogen compounds, such as ammonia, amines, nitriles, nitro compounds and nitrogen heterocyclic compounds;
(3) carbon, hydrogen or compounds composed of carbon, hydrogen and oxygen (lower alcohols, aldehydes, fatty acids, etc.).
Among them, the eight odor substances that have great influence on human body are hydrogen sulfide, ammonia, trimethylamine, methylmercaptan, methylsulfide, carbon disulfide, styrene and dimethyldisulfide. And what we usually refer to as odor gas is the gas with odor diffused in the air.
Characteristics of chemical waste gas
1. There are many inflammable and explosive gases.
For example, ketones, aldehydes with low boiling point, and unsaturated hydrocarbons that are easy to polymerize, a large number of flammable and explosive gases are easy to cause fire and explosion accidents and great harm if appropriate measures are not taken.
2. Most of the emissions are irritant or corrosive.
For example, sulfur dioxide, nitrogen oxide, chlorine, hydrogen fluoride and other gases are irritant or corrosive, especially sulfur dioxide emissions are the largest. Sulfur dioxide gas directly damages human health, corrodes the surface of metals, buildings and sculptures, and is easy to oxidize into sulfate and land on the ground, polluting soil, forests, rivers and lakes.
3. There are many kinds of floating particles in the waste gas, causing great harm.
The floating particles excluded from chemical production include dust, flue gas, acid mist, etc. there are many kinds, which do great harm to the environment. Especially when the floating particles and harmful gases exist at the same time, they can produce synergistic effect, which is more serious to human beings.