Coal-fired power generation as an important part of the global energy supply, its waste gas treatment is a key link to achieve clean energy and environmental protection, coal-fired power generation waste gas is mainly composed of nitrogen oxides NOx, sulfur dioxide SO₂, particulate matter PM and carbon dioxide CO₂, soot, etc., these waste gases have adverse effects on the environment and human health. Therefore, the waste gas treatment of coal-fired power generation is particularly important.
First, the harm of coal-fired power generation waste gas:
Sulfur dioxide and nitrogen oxides are the main substances to form acid rain, which cause serious damage to soil, water and ecosystem. Particulate matter and sulfur dioxide are harmful to human health and can cause respiratory problems; Carbon dioxide, a greenhouse gas, further contributes to global climate change; Heavy metals are also released into the environment through coal burning, posing a long-term threat to human health and ecosystems.
Two, the main coal-fired power generation waste gas treatment methods:
The generator exhaust gas purification equipment, DOC+DPF exhaust gas purifier, is composed of oxidation catalyst DOC and particle catcher DPF.
1. Particle catcher DPF: intercepts the particulate matter in the exhaust gas by physical methods, and then burns or dissolves it by heating, humidification and other means, so as to achieve the purpose of purification.
2, oxidation catalyst DOC: is through a certain catalyst to convert harmful substances in the exhaust gas into harmless substances, such as carbon monoxide CO and hydrocarbon HC into carbon dioxide CO₂ and water H₂O, at the same time, it can also eliminate sulfur oxides in the exhaust, convert it into sulfate.
3. Flue gas denitration: Flue gas denitration technology is to control NOx in the tail gas. Nitrogen ₃ or urea ₃ is used as a reducing substance. Under a certain temperature and catalyst, NH₃ reforms NOx into N₂ and H₂O.
4, ultra-low emission of coal-fired flue gas emissions: the trend of coal-fired power generation industry at home and abroad, the use of ultra-low emission technology can achieve relatively high denitrification effect, and reduce soot emissions.
Coal power generation waste gas treatment is an important link to achieve clean energy and environmental protection, with the continuous improvement of environmental awareness, a variety of waste gas treatment technology continues to develop and improve, in order to protect the environment and human health, through the use of advanced treatment technology and comprehensive treatment, further reduce pollutant emissions, improve air quality, promote sustainable development. With the continuous progress and innovation of technology, the waste gas treatment of coal-fired power generation will be more scientific and economic, reducing the impact of waste gas on the environment.
Post time: Aug-12-2024