Unlocking obstacles to the commercialisation of eutectic freeze crystallisation
Laboratory crystallisation cell tests on copper, brass, stainless steel and aluminium cooling plates in sodium sulphate solution, aimed at replacing mechanical scraping in brine treatment plants.
Coaltech | October 2022
Heat exchanger material governs how fast ice scale forms during eutectic freeze crystallisation of dilute brine. Induction time fell as thermal conductivity rose, so copper scaled first, while aluminium gave the lowest scaling rate because its low surface energy pushed ice crystallisation into the bulk. Stainless steel delayed onset but scaled heavily once nucleation started.
R1500,00
Description
Eutectic Freeze Crystallization (EFC) is a method that has potential for treating brines using less energy than evaporative crystallization while achieving high yields of water and salts. The technology is currently being developed for potential industrial treatment of brines. EFC is an innovative technology proposed for the treatment of brines to produce pure salt and water products. Scaling of the heat exchanger surface by both ice and salt is currently one of the major setbacks in the industrial implementation of EFC. Scaling is currently being controlled using mechanical scraping, which is susceptible to mechanical breakdown, thus negatively impacting the overall process efficiency
Related Products
Application of Earth ion Exchange Technology for Conversion of Ro Brine From Tutuka/new Denmark Into Saleable Products
2010
Pilot trial on single stage reverse osmosis brine at a Mpumalanga power station treating acid drainage from a neighbouring colliery, with projections for the planned second stage.
What this report foundIon exchange converted reverse osmosis brine from a power station treating colliery water and cooling tower blowdown into fertiliser and explosives salts, with...
R1500,00
Ion exchange converted reverse osmosis brine from a power station treating colliery water and cooling tower blowdown into fertiliser and explosives salts, with no liquid effluent left to dispose of. Part of the water rejected by the reverse osmosis stage was also recovered as potable water. Brine is currently used for dust suppression and stored underground.