Integral waterwall external heat exchangers

F - Mech Eng,Light,Heat,Weapons – 22 – B

Patent

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F22B 7/10 (2006.01) F22B 7/12 (2006.01) F22B 37/10 (2006.01)

Patent

CA 2693346

A combustion system having a combustor 2 that includes tub-ing 15 for carrying boiler water, a cy-clone 3 to recover solids from exhaust of the combustor 2 and an external heat exchanger 5 to recover heat from the solids, includes: a bypass 20 for pro-viding boiler water from the combus-tor 2 to tube bundles 6 of the external heat exchanger 5 and a boiler water re-turn 21 for providing boiler water from the tube bundles 6 to waterwall tubing 15 of the combustor 2. A method and an external heat exchanger are also pro-vided.

L'invention concerne un système de combustion ayant une chambre de combustion (2) qui comprend une tubulure (15) pour transporter de l'eau de chaudière, un cyclone (3) pour récupérer des matières solides depuis l'échappement de la chambre de combustion (2), et un échangeur thermique externe (5) pour récupérer de la chaleur depuis les matières solides, comprenant : une dérivation (20) pour fournir de l'eau de chaudière à partir de la chambre de combustion (2) vers des faisceaux de tubes (6) de l'échangeur thermique externe (5), et un retour d'eau de chaudière (21) pour fournir de l'eau de chaudière à partir des faisceaux de tubes (6) vers la tubulure de paroi d'eau (15) de la chambre de combustion (2). L'invention concerne également un procédé et un échangeur thermique externe.

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