Keystone provided project management, engineering, and design services for the MDH Hydrotreater NOx Reduction Project for a refinery in Southeast, Louisiana. The project included the retrofitting of the reactor charge heater and the product fractionator heater, which are part of the middle distillate hydrotreater (MDH), to reduce NOx emissions.

The scope of this project included replacing existing burners with ultra-low NOx burners (ULNBs) for each heater, including necessary modifications to heater floor and burner fuel gas piping, adding convection coils to each heater, installing one new CEMS system, main fuel emergency shutdown skids and O2/combustible analyzers.

Keystone provided the project management, civil/structural design, and mechanical design for all Phase III and Phase IV activities. The Phase III scope also included enough documentation to prepare a total installed cost estimate of + 10%.