Obiettivo Operational proof of a decisive improvement in energy efficiency in blast furnace coke production, based on a newly developed resource-conserving and environmental-protecting carbonization system (Jumbo Coking Reactor, JCR).Specifically, it is a question of proving the efficiency of linking the coke dry quenching and the coal preheating processes and in particular to demonstrate the suitability of steam as heat carrier during the coke dry quenching process and for coal preheating, and furthermore to proof the advantages of the side arranged waste heat regenerators with extremely high thermal insulation as well as the programme-controlled heating when preheated coal is charged.All of these components as well as the reactor dimension and side anchoring are purely innovative or have not been tested in full scale.The carbonisation tests were carried on systematically. The following coal charge blends were used in operation :* HKM (Huettenwerke Krupp-Mannesmann)* Coke plant Kaiserstuhl* ATH (August-Thyssen-Huette)* Voest (Austria)* Rautaruukki (Finland)As regards the investigations on the heat budget it can be concluded in summary that the gross energy supply for coal preheating and carbonisation will be lower than in a conventional coke plant operation with wet coal charges. Savings in underfining energy amount to 7-8%. Not considered in this figure were today's possibilities of heat recovery from red-hot coke and the utilisation of this heat for steam and electric power generation and/or as proposed in the framework of this project for coal preheating.The reduction of the gross energy supply by around 7% in JCR operation results froma) the energetically more favourable drying and preheating of charging coal in gravity charging modeb) the energetically more favourable carbonisation at coke and temperatures lower than in wet gravity charging mode.c) the program-controlled heating according to the CODECO process, that means a reduction in energy supply by the end of coal carbonisation.This potential of energy savings has turned out to be so substantial that the higher surface losses in the JCR conditioned by the construction type can be more than compensated.The JCR coke grades do have a clearly lower reactivity and the CSR value for the strength after reaction with carbon dioxide is higher than the coke produced from the same charging coal in conventional coke ovens.Various measures to make improvements were carried out :* Installation of an inflatable gasket at the cooling cassette to avoid emissions during coke pushing;* installation of an additional drive cylinder for the locking wedge at the cooling cassette.The layer-by-layer demolition of the Reactor S was finalised. It proved the * obliquity of the heating wall* pillow-shaped deformation ofthe regenerator building structure* opening of the brickwork joints in the lower area of the media channels.The destruction of the refractory building structure is considered to have been caused basically by a pillow-shaped deformation of the two concrete disks utilised as side anchoring.A decisive improvement in energy efficiency from currently approx. 38 % to approx. 70 % will be achieved for the new carbonization system by- Combination of Coke Dry Quenching (CDQ) and Coal Preheating (CP)- Demand-oriented heat supply for underfiring- Recovery of the sensible heat of raw coke-oven gas- Regeneration of the waste heat enthalpy in new side arranged regenerators- Special-type insulation using ultra-thermal insulating refractory materialsThe combination of CDQ and CP yields the maximum operational advantages based on the production-synchronous utilization of the heat recovered from the incandescent coke. As regards the combination of these two sub-processes the pilot plant scale operation has already been experienced. The further development to full scale maturity on the basis of a FULL SCALE DEMONSTRATION UNIT is one objective of this project.The demand oriented heat supply for underfiring is an essential component of the new carbonization system as well. Thissubprocess is also innovative in respect of lean gas underfiring for JCR-production units.The other aspects of enery saving (side arranged regenerator, special insulation) are entirely new.Improvements in the field of environmental protection and work place health and safety are achieved by applying new sealing systems in combination with the increase in productivity (ton of coke/reactor) by a factor of 2,5.The number of openings and the frequency of opening procedures are substantially lowered by increasing productivity severalfold, the same applying to the sealing surfaces to be cleaned.The project will be splitted into the following phases:- Engineering and construction- Commissioning- Testing of JCR and combined components- Optimization of Operation. Programma(i) ENG-THERMIE 1 - Programme (EEC) for the promotion of energy technology in Europe (THERMIE), 1990-1994 Argomento(i) 2.3 - INDUSTRY Invito a presentare proposte Data not available Meccanismo di finanziamento DEM - Demonstration contracts Coordinatore EUROPAISCHES ENTWICKLUNGSZENT. FÜR KOKEREITECHN Contributo UE Nessun dato Indirizzo SHAMROCKRING 1 44623 HERNE Germania Mostra sulla mappa Costo totale Nessun dato
