A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polypropylene reduces fgd cost and improves operation flexibility
Recent rapid escalation in the cost of certain metals has driven up the cost of alloys historically used in the construction of FGD (flue-gas desulfurization) vessels. RWE Power was planning to build two new super critical 1,100 MW units at their BOA station (BOA = Braunkohlekraftwerksblock mit optimierter Anlagentechnik) located near Cologne, Germany. The BOA plant was being designed to burn local lignite coal. RWE has 10,000 MWs of FGDs on lignite coals. RWE's experience with FGD systems burning lignite has shown that both carbon steel/rubber lined and flaked glass lined vessels have a defined life, especially since the BOA design criteria calls for > 70,000 ppm of Chlorides in the slurry. Up until now only metal vessels have life of plant expectancy. However, the recent rise in the cost of alloys typically used in FGD vessels has led to the application of a new design system for FGD vessel construction. For the new BOA plants, RWE selected the patented Bekaplast FGD vessel technology developed by the Steuler Company. The Bekaplast FGD vessels utilize a concrete shell with a polypropylene (PP) liner. Experience gained over the course of 25 years, during which Steuler utilized the most diverse corrosion protection materials in flue gas scrubbers, led to the development of a technically advanced and economically viable Bekaplast manufacturing concept. The main advantage of using polypropylene is that this material does not require additional protection. The surface is smooth and without pores, which prevents the formation of caking deposits or incrustations. The service life of this material is virtually unlimited. Bekaplast makes use of the advantages of polypropylene as mechanically anchored linings in concrete scrubber constructions. PP is also employed as a mechanically anchored corrosions protection lining in concrete scrubber constructions. It consists of large-format thermoplastic sheets having a thickness of 5 mm to 8 mm. Conical knobs create a permanent, inseparable mechanical bond between the plastic lining and concrete construction. The service life of the materials is also virtually unlimited. Damages caused by the absorption of media, the formation of deposits or chemical changes in the surface can be effectively ruled out. Today there are six FGD systems in operation and one in construction with the Bekaplast system. The paper will discuss the construction techniques used in the Bekaplast system, why the properties of PP lend them selves to FGD systems, and the advantages that the system has over other materials of construction.
Polypropylene reduces fgd cost and improves operation flexibility
Recent rapid escalation in the cost of certain metals has driven up the cost of alloys historically used in the construction of FGD (flue-gas desulfurization) vessels. RWE Power was planning to build two new super critical 1,100 MW units at their BOA station (BOA = Braunkohlekraftwerksblock mit optimierter Anlagentechnik) located near Cologne, Germany. The BOA plant was being designed to burn local lignite coal. RWE has 10,000 MWs of FGDs on lignite coals. RWE's experience with FGD systems burning lignite has shown that both carbon steel/rubber lined and flaked glass lined vessels have a defined life, especially since the BOA design criteria calls for > 70,000 ppm of Chlorides in the slurry. Up until now only metal vessels have life of plant expectancy. However, the recent rise in the cost of alloys typically used in FGD vessels has led to the application of a new design system for FGD vessel construction. For the new BOA plants, RWE selected the patented Bekaplast FGD vessel technology developed by the Steuler Company. The Bekaplast FGD vessels utilize a concrete shell with a polypropylene (PP) liner. Experience gained over the course of 25 years, during which Steuler utilized the most diverse corrosion protection materials in flue gas scrubbers, led to the development of a technically advanced and economically viable Bekaplast manufacturing concept. The main advantage of using polypropylene is that this material does not require additional protection. The surface is smooth and without pores, which prevents the formation of caking deposits or incrustations. The service life of this material is virtually unlimited. Bekaplast makes use of the advantages of polypropylene as mechanically anchored linings in concrete scrubber constructions. PP is also employed as a mechanically anchored corrosions protection lining in concrete scrubber constructions. It consists of large-format thermoplastic sheets having a thickness of 5 mm to 8 mm. Conical knobs create a permanent, inseparable mechanical bond between the plastic lining and concrete construction. The service life of the materials is also virtually unlimited. Damages caused by the absorption of media, the formation of deposits or chemical changes in the surface can be effectively ruled out. Today there are six FGD systems in operation and one in construction with the Bekaplast system. The paper will discuss the construction techniques used in the Bekaplast system, why the properties of PP lend them selves to FGD systems, and the advantages that the system has over other materials of construction.
Polypropylene reduces fgd cost and improves operation flexibility
Polypropylen senkt FGD-Kosten und verbessert die Betriebseigenschaften
Modes, Ralf (author) / Licata, Anthony (author) / Schwarz, Gunther (author)
2008
15 Seiten, 4 Bilder, 4 Tabellen, 3 Quellen
Conference paper
Storage medium
English
Rauchgasentschwefelung , Rauchgasentschwefelungsanlage , Braunkohle , Kohlekraftwerk , Optimierung , Polypropylen , Beton , Korrosionsbeständigkeit , Chlorid , Oberflächeneigenschaft , Ablagerung , Lebensdauer , Wäscher , Inbetriebnahme , Betriebserfahrung , Beschichtung (Überzug) , Betriebstemperatur , Glas , Kostensenkung
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