Advantages and Disadvantages of Several Common Industrial Waste Gas Treatment Solutions

Combustion method:

The combustion methods for industrial waste gas solutions are mainly divided into direct combustion method and catalytic combustion method based on combustion temperature and auxiliary medium.

Catalytic combustion method is more suitable for purifying high concentration and small volume chemical waste gases. When dealing with low concentration exhaust gas, due to maintaining a catalytic combustion temperature of 300-400 ℃, it is necessary to increase the combustion heat of the exhaust gas through concentration processes such as activated carbon adsorption. However, the water vapor in chemical waste gas and particulate matter can easily reduce the adsorption capacity of activated carbon and cause catalyst poisoning and deactivation, which limits the promotion and use of this method to a certain extent.

The industrial waste gas solution uses direct combustion method, which adds auxiliary fuel to the incinerator to burn together with chemical waste gas. The direct incineration process is mature and has high pollutant removal efficiency under certain temperature conditions. The incineration is completed, but there are generally problems during use:

1. If chlorine containing, brominated organic compounds, and aromatic hydrocarbons are incinerated, it is easy to produce strong carcinogens such as dioxins, especially during the start-up and shutdown of the incinerator. To avoid the production of dioxin substances, it is necessary to increase the combustion temperature. Maintaining such a high combustion temperature above 1200 ℃ not only incurs high operating costs, but also greatly increases the requirements for incinerators.

2. The incineration of chlorinated organic compounds can cause corrosion problems with hydrogen chloride, especially at high temperatures. The corrosion performance of hydrogen chloride is greatly improved, which not only corrodes pipelines but also causes corrosion in incinerators.

3. Flammable gases that are particularly volatile during incineration may pose a risk of explosion. If the explosion limit is reached and exposed to an open flame, it may cause an explosion.

In addition, if the industrial waste gas solution contains halogens, nitrogen elements, and sulfur elements, the combustion method is prone to produce nitrogen dioxide, dioxins, oxynitrides, and oxysulfides.