Key Features of Water Tube Fbc Steam Boiler With Membrane Water Wall

• The Drum does not form an integral part of the water - Steam circulation circuit, as all the water and Steam do not need to flow through the drum
• By arrangement of Top Headers, the re-circulated water does not flow to the drum, but re-circulation is thro` Top & Bottom Headers. This ensures better steam quality from the drum, as steam separation starts from Headers.
• In Bi-Drum Design, the Bank Tubes are expanded in to two Drums. The expanded joints in high pressure Boiler are a constant source of trouble. Where as in the offered Single Drum Designs, the Bank Tubes are in Panels and welded. There are easily approachable. Hence Tube replacement and maintenance in future is very easy.
• In the Single Drum Design, the Drum is Outside the Flue gas path and there are no Tube Holes expect for opening for 4 Headers. These openings are also fully compensated which results in much thinner shell plate thickness and minimum thermal stress.
• Membrane Water Wall 2.1/2" size Tubes are spaced 1" apart. This provides larger volume of Water in the Furnace Walls and contributes to a faster load response. In addition, uniquely designed Drum Internals can handle varying loads without circulation disruptions on carry over.
• Furnace Wall Water Cooling includes side walls & Bed Coil, eliminating Refractory and its attendant Maintenance.
• Drum Internals provides high Steam purity
• Pressurized Economizer & Air Pre Heater is provided for better waste Heat Recovery and to increase the overall Thermal efficiency of the Boiler.