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US 2026/0193840 A1Published application
A method for removing non-process elements in a kraft pulping process
AssigneeValmet Corporation
InventorsCamilla KARLEMO, Martin WIMBY, Claus JENSEN-HOLM, Sonja ENESTAM, Mats NORDGREN
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Abstract
A method for removing one or more non-process elements (NPE) in a Kraft pulping process in a Kraft pulp mill, the method comprising using NaHCO3 derived from a green liquor H2S stripping process to solubilize non-process elements (NPE) accumulated in a lime cycle process in the Kraft pulp mill and removing the solubilized one or more non-process elements from the lime cycle process.
Claims7
A method for removing one or more non-process elements (NPE) in a Kraft pulping process in a Kraft pulp mill, the method comprising:
- subjecting a green liquor to a H2S stripping process,
- conveying Na2CO3 derived from the H2S stripping process to a carbonator;
- producing NaHCO3 in the carbonator from the Na2CO3 derived from the H2S stripping process;
- conveying NaHCO3 produced from the Na2CO3 derived from the H2S stripping process to a lime cycle process in the Kraft pulp mill;
- mixing an aqueous solution NaHCO3 produced from the Na2CO3 derived from the H2S stripping process with lime mud and/or ESP ash to solubilize non-process elements (NPE) accumulated in the lime cycle process;
- and
- removing the solubilized one or more non-process elements from the lime cycle process.
4 more elements
Dependencies are inferred from the claim text.