Boosting the CDQ and DRI Application
Introduction:
Clair has successfully supplied 4 de-dusting systems for CDQ and DRI application for an integrated steel manufacturing plant in Odisha. The project included design, engineering, manufacture, supply and commissioning of the de-dusting systems. The complete package includes 4 de-dusting systems with bag filter volumes ranging from 20,000 m3/h to 60,000 m3/h.
CDQ is a system where hot coke removed from coke ovens at a temperature of approximately 1,000°C is cooled and kept dry with inert gas and the resulting steam produced in a waste heat recovery boiler is used to generate power. As the sensible heat recovered by heat transfer in the cooling chamber is utilized as a heat source for steam generation, electricity generated by CDQ is clean, environmentally-friendly energy. The dust emissions arising out of the coke material handling after quenching process is collected in the bag filter supplied by Clair.
Direct reduced iron (DRI) production is donein a shaft reduction furnace. The produced DRI has large metal iron content. While the produced DRI is mainly used as the raw material for steelmaking, it is also used as blast furnace feed for energy saving (reduction in coke consumption) and increased production of molten iron at integrated blast furnace steelworks. Fugitive dust emissions are a major concern in handling the DRI. These are produced during raw material and product handling, loading, unloading, storage, transportation of raw material and product, handling and disposal of char. De-dusting system has been supplied by Clair to capture fugitive emissions from the raw material handling process of DRI.
Picture:
Figure 1.Complete installation at Site
