Thursday, February 20, 2020

Germany: Vulcan Plans New Geothermal Power Plant for Lithium Extraction Demonstration Project

Positive Scoping Study Confirms Potential for Major European Zero Carbon Lithium™ Project (News Release)

Highlights:
  • Scoping Study for Vulcan’s Zero Carbon Lithium™ Project demonstrates the potential for a combined operation producing lithium hydroxide and renewable energy, with net zero carbon footprint.
  • The Scoping Study is based on a staged expansion plan:
    • Stage 1: Construction and operation of Direct Lithium Extraction (DLE) and lithium hydroxide plant at an operating, producing geothermal well and power plant, and;
    • Stage 2: Drilling ten new geothermal production wells, construction of new, combined geothermal, DLE and lithium hydroxide plant at Vulcan’s 100 %-owned Ortenau license.
A geothermal power plant and wells already exist for Stage One, at the Insheim Plant, therefore no geothermal process design is required. For Stage Two, details of plant design are provided below to inform the reader of the material factors around geothermal plant development.

The Stage Two Geothermal Power Plant is responsible for four main functions; receiving brine from all geothermal production wells to generate power from ORC units, reduce the temperature of the brine to levels adequate for the lithium extraction circuit, generate steam for use in the Li product dryer (only in the four well plant) and to reinject the brine with any NCGs produced. Scaling prevention is also an important component of the process design. Based on references from other facilities, 50 µm filters are used on both the production and reinjection lines to prevent clogging of fractures within the reservoir with fine particles. Additionally, scaling inhibitors are injected into the brine stream to reduce scaling on equipment, most notably to reduce cleaning frequency of heat exchangers.

Download the study.........

From the Global Geothermal News archives: