Classification and characteristics of domestic waste incineration flue gas
1、 Dust and heavy metals.
After domestic waste incineration, a large amount of flue gas is discharged, and a large amount of dust and heavy metal substances are mixed in the flue gas. In view of the particularity of domestic waste, dust and heavy metals are inevitable substances, and some special domestic waste incineration will produce more special flue gas pollutants, which will have a great impact on the surrounding ecological environment.
When domestic garbage is incinerated, the volume of garbage is rapidly reduced and a large amount of non-combustible substances are filtered out under high temperature incineration. In this process, many waste incineration powder will enter the flue gas with the air flow, thus forming special dust, which contains a large amount of heavy metal substances. Through the monitoring and analysis of the atmospheric environment, it can be seen that the flue gas discharged after incineration contains a large amount of heavy metals. Once inhaled, it will gradually harm the human body and greatly affect the physical and mental health of the human body.
2、 Dioxins and furans.
As special substances produced by domestic waste incineration, dioxins and furans are one of the main characteristics of domestic waste incineration and flue gas emission. Through the analysis of this substance, it is difficult to dissolve in water and easy to dissolve in oil. It is colorless and odorless. This substance contains a large amount of chlorinated organics, which are highly toxic. Once the human body absorbs this substance excessively, it will cause great damage to the human body. Therefore, in the process of domestic waste incineration, scientific and reasonable flue gas treatment technology scheme should be adopted to effectively eliminate relevant harmful substances and prevent flue gas from being discharged into the atmospheric environment, affecting the living health of surrounding residents.
3、 Acids.
In view of the particularity of domestic waste incineration treatment, the flue gas generated by incineration contains many acidic substances, such as SOx, NOx, HCl, etc. In the combination of sulfur dioxide, chloride and nitrogen oxide, the flue gas is acidic. Through the analysis of the formation process of related substances, it can be seen that because the chemical characteristics of related substances are acidic, related substances enter the flue gas after the incineration of domestic waste, making the flue gas acidic. Acid smoke will have a huge impact on the surrounding residents, plants, animals and the environment. In order to effectively avoid this problem, it is necessary to adopt scientific and reasonable purification technology to complete the effective treatment of flue gas.