Watson-Marlow pumps perform at Cornish Lithium Shallow Geothermal Test Site

Five 500 sequence cased peristaltic pumps from Watson-Marlow Fluid Technology Solutions are enjoying an important position in a demonstration plant at Cornish Lithium’s Shallow Geothermal Test Site in the UK.
Originally built to test เกจ์วัดแรงดันแก๊ส of extracting lithium from geothermal waters, Cornish Lithium is now working on an upgraded model of the check plant as its drilling program expands, in the end with the purpose of creating an efficient, sustainable and cost-effective lithium extraction provide chain.
The initial enquiry for pumps got here from GeoCubed, a joint venture between Cornish Lithium and Geothermal Engineering Ltd (GEL). GEL owns a deep borehole site at United Downs in Cornwall where plans are in place to commission a £4 million ($5.2 million) pilot plant.
“GeoCubed’s process engineers helped us to design and commission the test plant forward of the G7, which would run on shallow geothermal waters extracted from Cornish Lithium’s personal research boreholes,” Dr Rebecca Paisley, Exploration Geochemist at Cornish Lithium, said.
Adam Matthews, Exploration Geologist at Cornish Lithium, added: “Our shallow site centres on a borehole that we drilled in 2019. A particular borehole pump [not Watson-Marlow] extracts the geothermal water [mildly saline, lithium-enriched water] and feeds into the demonstration processing plant.”
The five Watson-Marlow 530SN/R2 pumps serve two different parts of the take a look at plant, the first of which extracts lithium from the waters by pumping the brine from a container up by way of a column containing a lot of beads.
“The beads have an lively ingredient on their floor that’s selective for lithium,” Paisley explained. “As water is pumped by way of the column, lithium ions connect to the beads. With the lithium separated, we use two Watson-Marlow 530s to pump an acidic resolution in varied concentrations by way of the column. The acid serves to remove lithium from the beads, which we then transfer to a separate container.
“The pumps are peristaltic, so nothing however the tube comes into contact with the acid resolution.”
She added: “We’re utilizing the remaining 530 sequence pumps to assist perceive what other by-products we are in a position to make from the water. For instance, we can reuse the water for secondary processes in industry and agriculture. For this reason, we have two different columns working in unison to strip all different parts from the water as we pump it through.”
According to Matthews, circulate rate was among the main causes for choosing Watson-Marlow pumps.
“The column needed a flow price of 1-2 litres per minute to fit with our test scale, so the 530 pumps were perfect,” he says. “The different consideration was choosing between guide or automated pumps. At the time, because it was bench scale, we went for guide, as we knew it will be simple to make changes while we had been nonetheless experimenting with process parameters. However, any future commercial lithium extraction system would of course reap the advantages of full automation.
Paisley added: “The beauty of having these 5 pumps is that we are ready to use them to help consider different applied sciences shifting forward. Lithium extraction from the type of waters we find in Cornwall isn’t undertaken anywhere else on the earth on any scale – the water chemistry here is unique.
“It is actually essential for us to undertake on-site check work with a big selection of completely different corporations and technologies. We need to devise probably the most environmentally accountable answer using the optimum lithium restoration technique, on the lowest potential working value. Using native corporations is a half of our technique, significantly as continuity of provide is important.”
To help fulfil the requirements of the next take a look at plant, Cornish Lithium has enquired after extra 530SN/R2 pumps from Watson-Marlow.
“We’ve also requested a quote for a Qdos a hundred and twenty dosing pump from Watson-Marlow, so we will add a certain quantity of acid into the system and obtain pH balance,” Matthews says. “We’ll be doing extra drilling within the coming 12 months, which is able to permit us to check our know-how on a quantity of sites.”

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