With the acceleration of urbanization, the disposal of domestic waste has become an increasingly serious problem. In order to effectively process a large amount of domestic waste, continuous domestic waste incinerator has been widely used. However, the flue gas produced during the incineration process contains a variety of harmful substances, such as sulfur oxides, nitrogen oxides, heavy metals, etc., which pose a serious threat to the environment and human health. Therefore, it is very important to effectively treat the flue gas of continuous domestic waste incinerator. List of high-quality authors
The flue gas treatment technology of continuous domestic waste incinerator is one of the hot spots in the current research. The technology mainly includes desulfurization, denitrification and dust removal, aiming to reduce the concentration of harmful substances in the flue gas and make it meet the emission standard. In this paper, the flue gas treatment technology of continuous domestic waste incinerator will be introduced in detail, including the technical principle, process flow, application status and development trend.
First, the technical principle.
The principle of continuous domestic waste incinerator flue gas treatment technology is mainly to remove harmful substances in the flue gas through physical and chemical methods. Specifically, the technology uses alkaline substances to neutralize the acid gas in the flue gas to achieve the purpose of desulfurization; The nitrogen oxides in the flue gas are reduced to nitrogen and water through a catalyst to achieve denitrification; At the same time, dust removal equipment is used to remove particles in the flue gas.
Second, the process flow.
The flue gas treatment process of continuous domestic waste incinerator mainly includes the following steps:
1.Dust removal: Use dust collectors such as electrostatic precipitators, bag filters, etc. to remove particles in the flue gas, so that the flue gas becomes relatively clean.
2.Desulfurization: Alkaline desulfurizers, such as limestone, sodium hydroxide, etc., are injected into the flue gas after dust removal treatment, and the acid gas in the flue gas is neutralized to remove sulfur oxides.
3.Denitrification: Nitrogen oxides are reduced to nitrogen and water by adding reducing agents, such as ammonia or urea, to the flue gas.
4.Secondary dust removal: secondary dust removal is carried out on the flue gas after desulfurization and denitrification treatment to ensure that the concentration of harmful substances in the flue gas meets the emission standard.
5.Emission: Treated flue gas is emitted into the atmosphere through the chimney.
Third, the application status.
At present, the flue gas treatment technology of continuous domestic waste incinerator has been widely used at home and abroad. In practical application, the appropriate process and equipment are selected according to the specific situation. For example, for flue gas with high sulfur content, wet desulfurization technology can be used; For flue gas with low sulfur content, dry desulfurization technology can be used. In addition, hybrid desulfurization technology can also be used for different regional climatic conditions and emission standards.
In China, with the improvement of environmental awareness and the development of technology, the flue gas treatment technology of continuous domestic waste incinerator has been more and more widely used. Many large-scale waste-to-energy plants have adopted advanced flue gas treatment processes to ensure that the concentration of harmful substances in the flue gas meets national standards. In addition, some places have also issued relevant policies to encourage enterprises to adopt continuous domestic waste incinerator flue gas treatment technology to promote the popularization and application of this technology.
Fourth, the development trend.
In the future, the flue gas treatment technology of continuous domestic waste incinerator will develop in a more environmentally friendly and efficient direction. On the one hand, with the increasingly stringent emission standards, there is a need to develop more efficient and low-cost desulfurization, denitrification and dust removal technologies. On the other hand, we should pay attention to the green development of technology and reduce the generation of secondary pollution. In addition, with the development of intelligent technology, the flue gas treatment process can be monitored and optimized in real time with the help of advanced information technology to improve the processing efficiency.
At the same time, in view of the problems and challenges encountered in the research and development and application of flue gas treatment technology of continuous domestic waste incinerator, it is necessary to strengthen scientific research and promote technological innovation and achievement transformation. By strengthening international cooperation and technological exchanges, and learning from foreign advanced experience and technological achievements, we will continuously improve China's overall level in this field.