In industrial production, waste gas is inevitably generated, and if these waste gases are discharged into the air without treatment, they will inevitably have an impact on the environment. Among them, gaseous waste gas is the most diverse and harmful industrial waste gas. At present, gaseous waste gas mainly includes nitrogen-containing organic waste gas, sulfur-containing waste gas, and hydrocarbon organic waste gas.

（1）含氮废气。此类废气会对空气组分造成破坏，改变气体构成比例。尤其是石油产品的燃烧，在工业生产中石油产品的燃烧量巨大，而石油产品中氮化物含量大，因此废气中会含有大量氮氧化物，若排放到空气中会增加空气氮氧化物含量，对大气循环造成影响。

(1) Nitrogen containing waste gas. This type of exhaust gas can cause damage to the air components and change the proportion of gas composition. Especially in the combustion of petroleum products, the combustion volume of petroleum products in industrial production is huge, and the nitrogen content in petroleum products is high, so the exhaust gas will contain a large amount of nitrogen oxides. If discharged into the air, it will increase the content of nitrogen oxides in the air, which will affect the atmospheric circulation.

2）含硫废气。含硫废气会对人们的生活环境造成直接危害，这是由于其同空气中的水结合能够形成酸性物质，引发酸雨。而酸雨会对植物、建筑以及人体健康造成损害，尤其会影响人的呼吸道。另外还会对土壤和水源造成影响，造成二次污染。

2) Sulfur-containing waste gas. Sulfur containing waste gas will cause direct harm to people's living environment, because it can combine with water in the air to form acidic substances and cause acid rain. Acid rain can cause damage to plants, buildings, and human health, especially affecting the respiratory tract. In addition, it will also have an impact on soil and water sources, causing secondary pollution.

（3）碳氢有机废气。该类废气统称烃类，是一种有机化合物，主要由碳原子和氢原子构成。此类废气扩散到大气中会对臭氧层造成破坏引发一系列问题，影响深远。例如臭氧层破坏会加重紫外线的照射，而紫外线会对人的皮肤造成伤害，引发各类健康问题。另外紫外线照射度的改变也会对生态系统以及气候造成影响。

(3) Hydrocarbon organic waste gas. This type of exhaust gas, collectively known as hydrocarbons, is an organic compound mainly composed of carbon and hydrogen atoms. The diffusion of such exhaust gases into the atmosphere can cause damage to the ozone layer, leading to a series of problems and far-reaching impacts. For example, the destruction of the ozone layer can exacerbate ultraviolet radiation, which can cause damage to human skin and cause various health problems. In addition, changes in UV exposure can also have impacts on ecosystems and climate.

烟气脱硝技术是将烟气中SOx进行分离，转化为一种长期稳定、不对周边环境造成二次污染的物质的方法。

Flue gas denitrification technology is a method of separating SOx from flue gas and converting it into a long-term stable substance that does not cause secondary pollution to the surrounding environment.