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Veolia to supply chloride-removal system for pulp plant in Brazil

By Mary Page Bailey |

Veolia Water Technologies (www.veoliawatertechnologies.com) will support a major expansion of a mill in Brazil by providing a turnkey chloride removal system designed to optimize the processing of wood-derived pulp used in the making of cellulose fibers.

The pulping production uses a washing and cleaning process to increase the purity of the pulp. The resulting product of this process is a liquid stream that is rich in organics for energy production. This liquor, however, requires careful management and removal of chemicals to avoid the undesired build-up of chloride and potassium in the recovery cycle, which if left uncontrolled, can create corrosion and boiler fouling.

To prevent significant boiler capacity losses and increased operating costs, Veolia will treat 650 tons per day of precipitator ash. Based on advanced crystallization technology, HPD Enhanced Chloride Removal Process (ECRP) will be integrated into the project to yield the best control of sodium recovery and chloride removal steps.

“Veolia is proud of enabling substantial chemical savings at yet another world-class pulping project in Brazil. Recycling inputs and cutting waste while making pulping operations more productive and sustainable are at the heart of our technologies. We are pleased to make pulping processes more resource-efficient in Brazil and all over the world,” said Jim Brown CEO, Veolia Water Technologies Americas.

The benefits of purging chloride and potassium residuals in the recovery cycle are not limited only to the economic boost of lower operating costs and improved steam generation in the recovery boiler. ECRP’s recovery of soda chemicals from the mother liquor also makes environmental gains by protecting the health of wildlife and waterways through limited emissions of sulfur compounds and minimized losses of sulfate salts.

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