Reverse flow gasifier

Development of a Novel, Reverse-Flow, Slagging Gasifier... 

Due to reverse-flow operation higher operation temperatures inside the gasifier are expected, which, it is hoped, it would result in ... 

The project started with experimental work in a small lab-scale unit (biomass throughput 2 kg/hr). The operation principle and preliminary results are presented elsewhere [2, 3,5]. The main conclusions which could be drawn was that operation of a reverse-flow slagging gasifier is technical feasible with promising performance. Based on these promising results of the small unit a mini-plant (20 kg/hr) was designed and constmeted. 

The project was aimed at the development of an innovative gasifier based on the reverse-flow principle. It should result in an improvement in thermal efficiency, and enabling the conversion of biomass with high ash contents and low ash-melting point. 

Brammer, J.G., Held, B. Van de, Bridgwater, A.V., Assink, D., Development of a novel reverse-flow slagging gasifier for small-scale cogeneration applications, Proceedings 4 biomass conference of the Americas, 1999, pp. 1119-1126... 

Beld, L. Van de, Technical feasibility of a reverse-flow, slagging gasifier to improve thermal efficiency, Novem-report 9913, 1999... 

Gasification of biomass with oxygen rich air in a reverse-flow slagging gasifier, Final report JOR3-CT97-0130, June 2000... 

Brammer J. G., van de Beld L., Bridgwater A. V., Assink D. (1999) Development of a Novel Reverse-Flow Slagging Gasifier for Small-Scale Cogeneration Applications. In Proc. 4th Biomass Conference of the Americas, pp. 1119-1126. 

Transport equations, for the surface force-pore flow model, 21 640—641 Transport gasifier, 6 798 Transport models, reverse osmosis, 21 638-639... 

The last term in Equation (8.3) is not applied for most of the evaluated streams, as the concentration potential is not usable. However, the concentration exergy represents the minimal necessary reversible separation energy for the concentrated oxygen (in gasifying agents) and nitrogen flows (e.g., for dry feeding from the air separation unit. Therefore, it is included in these streams. 

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