Mineral Scaling ....
most common forms of mineral scaling in geothermal
developments are silica scaling and calcite scaling.
Calcite scaling commonly occurs
in production wells, normally at the
point of first flashing within the well. With a chemical analysis of
the fluids in the well, we can calculate the likelihood of calcite
scaling. We can advise on methods for treating calcite scaling
and we offer a service to test for correct antiscalant dosing rates.
scaling can occur
when the temperature of brine is dropped and the silica concentration
becomes greater than the solubility. In these cases, amorphous
silica is precipitated, normally as a low density scale.
Silica scaling can be treated or avoided in a number of different
ways. We offer a full consulting service for advice and
experimental verification of silica scaling.
Trace metal scaling can
also become a problem - particularly in heat exchangers in binary
plants. We have extensive experience with these problems,
particularly antimony sulfide scaling, in New Zealand. We can
calculate the likelihood of this type of scaling and offer