In addition to generating large amounts of hot gas during power generation, diesel generator sets also generate a large amount of combustion exhaust gas, such as carbon dioxide, carbon monoxide, water vapor, nitrogen oxides, etc. According to their hazards to humans, they can be divided into harmful emissions and harmless. There are two major types of emissions. Harmful emissions, also known as emission pollutants, mainly come from exhaust emissions (commonly known as tail gas), with a small amount coming from crankcase emissions and fuel evaporative emissions. Exhaust emissions are harmful substances discharged from diesel engine exhaust pipes.
The diesel used in the diesel generator set is a polymer hydrocarbon. When it is completely burned in the combustion chamber, it will only produce carbon dioxide and water vapor, plus excess oxygen and residual nitrogen.
These components are the products of complete combustion of fuel oil and air. From a toxicological point of view, these components in exhaust gas are harmless (in the past, CO2 was not considered a pollutant, but with the large-scale use of petroleum fuels, CO2 in the atmosphere has caused a greenhouse effect. Arouse the attention of all mankind).
In addition to the above basic components, there are incomplete combustion products and intermediate products of combustion reactions in diesel engine exhaust, mainly including carbon monoxide, hydrocarbons, sulfur dioxide, NOX and PM, etc. The total amount of these components is less than 1% in the exhaust emissions of diesel engines. But most of them are harmful, or have a strong pungent odor, and some also have carcinogenic and mutagenic (mutation) effects, so they are classified as harmful emissions.
The harm of exhaust gas to human body.
After CO enters the human body through the respiratory tract, it binds with hemoglobin, destroys the oxygen exchange mechanism in the blood, causes hypoxia and damages the central nervous system, causing discomfort, vomiting, coma, and dementia. In severe cases, it can cause CO poisoning.
HC contains many carcinogens, long-term exposure can induce lung cancer, gastric cancer and external cancer.
NO2 reacts to the human eye mucosa, causing conjunctivitis, keratitis, lung swelling, and pneumonia and pulmonary edema.
HC and NOx will produce chemical smog when exposed to ultraviolet rays when the sun is strong, making people difficult to breathe, plants withered and fallen leaves, and accelerating the aging of rubber products and buildings.
PM can cause chronic diseases such as asthma, bronchitis and emphysema after being inhaled into the human body, agricultural production systems such as PAH adsorbed on soot particles are extremely harmful carcinogens.
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