OPERATING EXPERIENCES AND MEASURING RESULTS OF FLUE GAS SCRUBBING PLANTS FOR THE REMOVAL OF MULTI POLLUTANTS ACCORDING TO THE PRINCIPLE OF THE GRAF-WULFF TECHNOLOGY

摘要

In the cleaning of flue gas, the applied dry FGS-technology provides in comparison with the wet flue gas desulphurisation, easy operation, higher removal rates as well as low investment and operating costs. The patented GRAF-WULFF FGS-Technology is based on the Circulating Fluid Bed Scrubber (CFBS) and achieves therefore major success in the international market. It is already effectively applied in fifty reference plants in coal and oil-fired power plants, biomass combustion plants as well as in industrial waste and municipal waste incineration plants in different countries with its different legal requirements on the flue gas scrubbing efficiencies. Only in the last five years more than twenty FGS-plants with an operating range between 10,000 to 1,200,000 Nm~3/h per single module have been realized. The operating experiences and results show that all emission limits set by national and international standards have been met resp. full below the values. The measured removal rates for most of the pollutants ranges more than 95%. This paper summarises the operating experiences and measured results in terms of the simultaneous removal of SO_2, SO_3, HCl, heavy metal elements, dioxins and furans in these plants. The removal mechanisms are briefly described as well.