D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 11/06 (2006.01) B01D 53/48 (2006.01) B01D 53/52 (2006.01) C01B 17/32 (2006.01) C01F 11/10 (2006.01) D21C 11/12 (2006.01)
Patent
CA 2241138
The disclosure relates to a process for the removal of solid CaS (64) from a gas stream in which the CaS has been formed and then the conversion of that solid CaS (64) by reaction with an aqueous NaOH solution (68) to produce solid Ca(OH)2 (69) and a liquor stream containing dissolved NaHS (72). This removal and conversion process is described as being used in conjunction with a process for gasifying black liquor from a kraft pulping process in which H2S is scrubbed from the gases with little or no absorption of CO2 using calcium compounds to form the CaS.
Cette invention concerne un processus permettant d'éliminer le CaS solide (64) qui s'est formé dans un flux de gaz, et d'effectuer une transformation de ce CaS solide (64) par réaction avec une solution aqueuse de NaOH (68) de manière à obtenir du Ca(OH)¿2? solide (69) et un flux de liqueur contenant du NaHS dissous (72). Ce processus d'élimination et de transformation est utilisé de concert avec un processus de gazéification de liqueur noire à partir d'un procédé kraft dans lequel le H¿2?S est séparé des gaz avec peu ou pas d'absorption de CO¿2? à l'aide de composés de calcium de manière à former le CaS.
Combustion Engineering Inc.
Smart & Biggar
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