In industrial production, a reasonable choice of flue gas desulfurization process is the key to reducing sulfur dioxide emissions and protecting the environment.Selection of flue gas desulfurization process needs to follow the following main technical principles.
The first is the principle of desulfurization efficiency priority.Different industries have different requirements for desulfurization efficiency, thermal power plants and other enterprises with strict emission requirements should give priority to limestone - gypsum method and other desulfurization efficiency of more than 90% of the process, to ensure that the flue gas emissions in line with the stringent environmental protection standards; and relatively low requirements for the efficiency of desulfurization of small-scale industrial kilns, you can consider simple wet desulfurization process.
Secondly, the economics of the process should be considered.In addition to equipment procurement costs, operating costs such as desulfurizer consumption, energy consumption, equipment maintenance is also an important consideration.Although ammonia FGD has high desulphurization efficiency, the cost of ammonia is high; whereas lime - gypsum FGD has a wide range of desulphurizing agents, low price and relatively stable operating cost.Enterprises should choose the cost-effective process according to their own economic strength and long-term operation planning.
In addition, technology suitability should not be neglected.To combine the flue gas composition, temperature, flow rate and other characteristics of the selection process.For example, semi-dry desulfurization process is suitable for high dust, low sulfur content of the flue gas, can be realized at the same time desulfurization and dust removal; while seawater desulfurization is suitable for coastal areas, make full use of seawater resources.In addition, it is also necessary to pay attention to the reliability of the process and ease of operation, and select technologies that are easy to maintain and stable in operation to ensure production continuity.
In short, the choice of flue gas desulphurization process needs to be comprehensively weighed desulphurization efficiency, economy, technology suitability and other factors, in order to achieve the double benefits of environmental protection and economy.
