Continuous medium-grade waste heat + no thermal user nearby + meaningful power price. Cement kilns and glass furnaces are the classic hosts.
From our guide: Waste heat to power (ORC) — full context, charts and sources there.
Boilers, kilns, heat exchangers, valves and steam lines lose energy continuously. Inzonex makes patented (UK GB2508992.1) removable modular insulation — snap-fastened covers engineered per temperature tier, not generic off-the-shelf jackets: