| 摘要 |
The invention relates to a method for using biomass even in high-temperature processes, something which has hardly been possible until now as a result of the fuel-related chlorides in flue gas and the problems of corrosion associated therewith. A solution of this type is primarily required in the energy industry, for open and closed-cycle gas turbine processes, steam-powered operating processes, and in process engineering. Economical energy handling and efficient thermal conversion processes are becoming ever more important in the fight against climate change. Biomass provides a contribution to this, neutrally combusting CO2 since the assimilation of photosynthesis binds the CO2 at the same ratio by means of growth. The chlorides contained in the cell structure present a problem as they volatise during combustion causing large-scale corrosive damage to metal surfaces. However, high temperatures are significant in determining efficiency and biomass should therefore also be usable in high-temperature processes. In order to arrive at combustion chamber temperatures of higher than 1300°C, combustion air and biomass must be pre-heated correspondingly using flue gas. Following separation of the course ash, the flue gas passes through a corrosion filter in which easily-exchangeable sacrificial metal surfaces chemically bind the chlorides as far as possible, in order for subsequent stages to be protected. |
