Combustion turbine start-up and low-load can damage HRSGs by high exhaust temperature and high attemperator spray water flow. High spray water flows can damage steam piping, superheaters and reheaters. High turbine exhaust temperatures, especially those at or above 1200°F, can cause oxidation and creep damage to the HRSG inlet duct non-pressure part materials. These materials include liner plates, tube ties, flow distribution plates and gas baffles. This leads to costly repairs and unscheduled maintenance.
With the patented HRST QuenchMaster® Air Attemperator, these problems can be avoided. This system enables safe low load HRSG operation by reducing or eliminating attemperator spray water flow. Based on our experience, this enables plants to run in emission compliance with an additional 10-20% reduction in CT load. The HRST QuenchMaster Air Attemperation System also avoids low load superheater and reheater steam temperature control challenges.
Click here to read a Combined Cycle Journal case study about how one midwestern plant was able to eliminate their low-load steam temperature problems with the HRST QuenchMaster®.
Use the following to request a brochure: HRST QuenchMaster
HRST QuenchMaster® is a registered trademark of HRST, Inc.
HRST QuenchMaster® Air Attemperator is patented.