Mitigation of deposits and secondary reactions in thermal...

B - Operations – Transporting – 08 – B

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B08B 9/045 (2006.01) B08B 9/032 (2006.01) C10G 75/00 (2006.01) C10J 3/72 (2006.01)

Patent

CA 2719698

Described herein are systems and methods for reducing cumulative deposition and unwanted secondary thermal reactions in pyrolysis and other thermal conversion processes. In an embodiment, a system comprises a device, referred to as a reamer, for removing product deposits between thermal conversion and condensation operations of a pyrolysis process. The reamer may comprise, but is not limited to, a mechanical reciprocating rod or ram, a mechanical auger, a drill bit, a high-temperature wiper, brush, or punch to remove deposits and prevent secondary reactions. Alternatively or in addition, the reamer may use a high-velocity curtain or jet (i.e., a hydraulic or pneumatic stream) of vapor, product gas, recycle gas, other gas jet or non-condensing liquid to remove deposits. Preferably, the reamer removes deposits during the pyrolysis process allowing for continuous operation of the pyrolysis process.

La présente invention concerne des systèmes et des procédés destinés à réduire le dépôt cumulatif et les réactions thermiques secondaires indésirables au cours dune pyrolyse et dautres processus de conversion thermique. Dans un mode de réalisation, un système comprend un dispositif, désigné par alésoir, destiné à retirer les dépôts de produit entre les opérations de conversion thermique et de condensation dun processus de pyrolyse. Lalésoir peut comprendre une tige ou un vérin mécanique animés dun mouvement de va-et-vient, une vrille mécanique, un foret, un racloir, une brosse ou un poinçon haute température pour retirer les dépôts et empêcher des réactions secondaires, mais nest pas limité à ces éléments. En variante ou en plus, lalésoir peut utiliser un rideau ou jet à grande vitesse (cest-à-dire un courant hydraulique ou pneumatique) de vapeur, de gaz de gazogène, de gaz recyclé, dun autre jet de gaz ou dun liquide sans condensation pour retirer les dépôts. De préférence, lalésoir retire les dépôts pendant le processus de pyrolyse, ce qui permet un fonctionnement continu du processus de pyrolyse.

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