Title

PW TECHNOLOGY IN ENERGY RECOVERY: BPSL CDQ PROJECT

Authorship

Esposito, Antonio; Silva Junior, Helênio Resende; Strobino, Fabrizio; Calcagno, Riccardo; Fabbri, Andrea; Lambardi, Francesco

Esposito, Antonio

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Silva Junior, Helênio Resende

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Strobino, Fabrizio

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Calcagno, Riccardo

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Fabbri, Andrea

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Lambardi, Francesco

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DOI

10.5151/4444-4444-26864

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Abstract

Saving energy and reducing resource’s consumption by minimizing emissions are today great challenges in the coking industry worldwide. In order to achieve satisfying results, equipment as well as technology should be continuously improved and designed to minimize the energy requirements and to maximize the recovery of materials and energy. The sensible heat in coke pushed out of oven chamber takes up 35 ÷ 40 % of energy consumption of coke oven. Usually the coke thermal energy is lost during traditional coke wet quenching, necessary to reduce the coke temperature for the storage and the following use in steelmaking processes. BPSL CDQ project is a sample how Paul Wurth’s technology allows to reach the energy saving goal and offers an alternative to traditional quenching. With the adoption of Coke Dry Quenching process, a considerable amount of this sensible heat in the coke can be recovered by producing steam; its production depends on various parameters, some of them battery related (Volatile Matters in red hot coke) and others CDQ system related (coke burning losses, superheated steam characteristics (i.e. P,T)), greatly depending also on boiler efficiency (heat exchange efficiency, insulation of the boiler itself, air leakage, etc.). The adoption of CDQ process reduces also the water consumptions in comparison with traditional quenching.

Keywords

Energy recovery, Coke quenching, Water saving

Water saving