| title: |
Formation of Chlorine Compounds by Burning of Oil shale in Fluidized Bed Conditions |
| reg no: |
ETF5159 |
| project type: |
Estonian Science Foundation research grant |
| subject: |
2.5. Power Engineering
|
| status: |
completed |
| institution: |
Tallinn Technical University |
| head of project: |
Arvo Ots |
| duration: |
01.01.2002 - 31.12.2005 |
| description: |
The project belongs to the field of the Estonian oil shale combustion technology in the FBC conditions. The pulverized firing (PF) in the existing oil shale power plants are to be replaced with the fluidized bed combustion (FBC) technique. For the burning of oil shale are suitable the atmospheric circulating fluidized bed combustion (AFBC) and also the pressurized combustion (PFBC). The introducing of the FBC technology allows to rise the power plants thermal efficiency and the remarkably reduce the air pollutants emission specially by using the PFBC technology. In PFBC conditions the consisting in the oil shale calcium carbonate and dolomite does not directly dissociated due to high carbon dioxide pressure in the flue gas. The decomposition of the carbonates would take place only on the affect of the solid components in the oil shale mineral matter and on the gas phase components in ambient gas atmosphere. The behavior of calcium oxide content minerals in combustion process of oil shale directly connected on the formation of calcium chloride. The formation of new chlorine containing compounds also depends upon on the processes with sandy-clay minerals. They are in the remarkable amount consist of alkali metals. The chlorine in oil shale a part of the organic matter and in thermal decomposition volatilized as chlorine hydrogen. The objective of the project is the investigation of the temperature and surrounding ambient on the behavior of the chlorine on the consisting of the oil shale calcium compounds and alkali metals on the atmospheric and as well as in the pressurized conditions. The goal of the project are to investigate the nature of the binding of the calcium compounds and alkali metals with the chlorine and sulphur dioxide in FBC conditions. The behavior of the chlorine in combustion process very strongly affects on the ash deposits formation mechanism on the heat transfer surfaces and also on the high temperature corrosion of the boiler tubes. The results of the research would be implemented by the design and running of the FBC boilers in oil shale power plants. |