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

Five 500 collection cased peristaltic pumps from Watson-Marlow Fluid Technology Solutions are enjoying an necessary role in an indication plant at Cornish Lithium’s Shallow Geothermal Test Site in the UK.
Originally constructed to test the concept of extracting lithium from geothermal waters, Cornish Lithium is now working on an upgraded model of the take a look at plant as its drilling program expands, finally with the aim of creating an environment friendly, 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 website at United Downs in Cornwall where plans are in place to fee a £4 million ($5.2 million) pilot plant.
“GeoCubed’s course of engineers helped us to design and commission the take a look at plant ahead 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 website centres on a borehole that we drilled in 2019. A special 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 elements of the test plant, the primary of which extracts lithium from the waters by pumping the brine from a container up through a column containing numerous beads.
“The beads have an active ingredient on their surface that is 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 numerous concentrations by way of the column. The acid serves to take away lithium from the beads, which we then switch to a separate container.
“The pumps are peristaltic, so nothing but the tube comes into contact with the acid solution.”
She added: “We’re using the remaining 530 collection pumps to assist perceive what other by-products we are able to make from the water. For occasion, we can reuse the water for secondary processes in business and agriculture. For เกจวัดแรงดันแก๊สco2 , we’ve two different columns working in unison to strip all other parts from the water as we pump it by way of.”
According to Matthews, circulate rate was among the main reasons for selecting Watson-Marlow pumps.
“The column needed a circulate price of 1-2 litres per minute to fit with our take a look at scale, so the 530 pumps have been best,” he says. “The other consideration was choosing between handbook or automated pumps. At the time, because it was bench scale, we went for handbook, as we knew it might be easy to make adjustments whereas we have been still experimenting with process parameters. However, any future industrial lithium extraction system would of course take benefit of full automation.
Paisley added: “The great thing about having these five pumps is that we will use them to assist evaluate other applied sciences transferring ahead. Lithium extraction from the kind of waters we discover in Cornwall just isn’t undertaken wherever else on the planet on any scale – the water chemistry right here is unique.
“It is basically essential for us to undertake on-site check work with quite lots of completely different companies and applied sciences. We need to devise the most environmentally accountable answer utilizing the optimum lithium restoration method, at the lowest attainable operating cost. Using native companies is a part of our technique, significantly as continuity of supply is important.”
To assist fulfil the requirements of the next test plant, Cornish Lithium has enquired after more 530SN/R2 pumps from Watson-Marlow.
“We’ve also requested a quote for a Qdos one hundred twenty dosing pump from Watson-Marlow, so we can add a specific amount of acid into the system and obtain pH steadiness,” Matthews says. “We’ll be doing extra drilling within the coming 12 months, which will permit us to test our know-how on multiple sites.”

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