The 'CombiPower Process'-a Possibility for Decentralized Generation of Power, Heat and Industrial Gas from Coal and Biomass

摘要

A process (the CombiPower process) is presented that combines fluidized bed gasification with air as the gasification medium and fluidized bed combustion. With this process, decentralized generation of electric energy and heat from biomass in compliance with the regulations of Germany's Renewable Energy Act (EEC) is feasible both with regard to the processing equipment required and in terms of economic efficiency. By enriching the oxygen content in the air, e.g. to around 50 percent O_2, in the CombiPower-Plus process, an industrial gas with a calorific value of around 8 MJ/kg can be produced. Moreover, compared to an otherwise identical CombiPower plant, the fuel rating can be increased by a factor of 2.5 to 3. Feasibility studies show that with a further global increase in the prices for energy resources, besides the use of regenerative raw materials such as wood, regionally available brown coal can also be used cost-efficiently for decentralized energy conversion.