The basic principle of low concentration gas power generation is to use a gas engine or gas turbine to convert the thermal energy of gas into mechanical energy, and then convert mechanical energy into electrical energy through a generator. The main technical difficulties that need to be addressed in this process include:
1. Combustion stability: Due to the methane concentration of low concentration gas being lower than the lower combustion limit, achieving stable combustion in gas engines or gas turbines is a challenge. To solve this problem, it is usually necessary to add auxiliary fuels such as air or other combustible gases to the gas to improve its combustion stability.
2. Combustion efficiency: Due to the low energy content of low concentration gas, improving combustion efficiency is another important technical challenge. This usually requires optimizing the design of the burner to achieve efficient mixing and combustion.
3. Emission control: Gas combustion can produce harmful emissions, such as nitrogen oxides and carbon monoxide, so effective emission control technologies are needed to meet environmental requirements. This may require the use of advanced emission control equipment and technologies, such as selective catalytic reduction (SCR) and oxidation catalysts.
4. Durability and reliability of equipment: Due to the corrosiveness of gas and the challenging combustion conditions, the durability and reliability of equipment are another key technical challenge. This may require the use of corrosion-resistant and high-temperature materials and designs to improve the service life and operational stability of the equipment.
In recent years, with the development of technology, low concentration gas power generation technology has also been continuously improved. Especially in the design and manufacturing technology of gas engines and gas turbines, optimization design of burners, and emission control technology, significant progress has been made.
Specifically, modern gas engines and turbines have been able to handle lower concentrations of gas and achieve higher combustion efficiency and power output. Meanwhile, by optimizing the design of the burner, better mixing and combustion can be achieved, combustion efficiency can be improved, and harmful emissions can be reduced. In addition, advanced emission control technologies such as SCR and oxidation catalysts can effectively reduce the emissions of nitrogen oxides and carbon monoxide.
The application of low concentration gas power generation technology is also expanding globally. On the one hand, this technology can effectively utilize the gas emitted from mines, providing a new energy utilization approach for mines, and also helping to reduce the impact of gas on the environment. On the other hand, low concentration gas power generation can provide stable power supply to the power grid, especially during peak electricity demand periods, which can play a role in peak shaving.
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