Comments on: Review of sodium salt scaling in the recovery cycle http://pulpandpapercircle.com/2008/10/review-of-sodium-salt-scaling-in-the-recovery-cycle/ the resource for industry professionals Mon, 04 Jan 2010 17:54:56 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Roxare http://pulpandpapercircle.com/2008/10/review-of-sodium-salt-scaling-in-the-recovery-cycle/comment-page-1/#comment-45 Roxare Thu, 23 Jul 2009 14:38:36 +0000 http://www.pulpandpapercircle.com/wordpress/?p=42#comment-45 I have touched on the solubility problems of aluminosilicates in kraft pulping of wood, and the measures that can be taken to reduce these problems, in one of my posts : http://pulpandpapercircle.com/category/scaling-in-alkaline-liquors/ For the pulping of wheat straw, silica scaling is an inherent problem, as the silica content of wheat straw is high. Measures that have been taken include purging of black liquor, and/or landfilling of lime mud. There is a commercial system available for removing silica by the Siloxy process: http://www.siloxy.com/Desilication.htm . High purity oxygen is used instead of air in combustion of the black liquor, resulting in a flue gas with a very high concentration of CO2. A portion of the flue gas is then used to acidify the black liquor and precipitate out the silica. I have touched on the solubility problems of aluminosilicates in kraft pulping of wood, and the measures that can be taken to reduce these problems, in one of my posts
: http://pulpandpapercircle.com/category/scaling-in-alkaline-liquors/

For the pulping of wheat straw, silica scaling is an inherent problem, as the silica content of wheat straw is high. Measures that have been taken include purging of black liquor, and/or landfilling of lime mud. There is a commercial system available for removing silica by the Siloxy process: http://www.siloxy.com/Desilication.htm . High purity oxygen is used instead of air in combustion of the black liquor, resulting in a flue gas with a very high concentration of CO2. A portion of the flue gas is then used to acidify the black liquor and precipitate out the silica.

]]> By: SURES JENA http://pulpandpapercircle.com/2008/10/review-of-sodium-salt-scaling-in-the-recovery-cycle/comment-page-1/#comment-40 SURES JENA Tue, 21 Jul 2009 04:49:16 +0000 http://www.pulpandpapercircle.com/wordpress/?p=42#comment-40 Need more details to control the frequent scaling of wheat straw liquor. Need more details to control the frequent scaling of wheat straw liquor.

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