D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
9/37, 9/36.2
D21C 11/12 (2006.01) D21C 11/06 (2006.01)
Patent
CA 1211257
METHOD AND APPARATUS OF RECOVERY OF HEAT AND CHEMICAL VALUES FROM SPENT PULPING LIQUORS ABSTRACT OF THE DISCLOSURE An integrated apparatus and process for recovery of heat and chemical values from spent pulping liquors are disclosed. In carrying out the process spent pulping liquor is subjected to combustion with air in a fludized bed reaction chamber to produce gaseous and solid combustion products, the fluidized bed reaction chamber being provided with a plurality of inert solid particulate materials, at least one of which is of finer particle size than another, treating the finer particulate size inert particulate material in an external fluidized bed unit to recover heat values from the finer inert particle material, separating the remaining solid combustion products from the gaseous combustion products in a manner to leave a minor portion of the solid combustion products entrained in the gaseous combustion products, and oxidizing the gaseous combustion products containing the entrained solid combustion products at a temperature greater than the melting point of said solid combustion products.
431897
Gowling Lafleur Henderson Llp
International Paper Company
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