Biomass Fired Boilers -Reciprocating Grate

About Biomass Fired Boilers -Reciprocating Grate

The CBL Reciprocating Grate Boiler is an advanced, multi-fuel biomass fired power boiler designed for high-capacity steam and power generation applications. Built on a Three Pass Water Wall design with hydraulically driven reciprocating grate technology, it is engineered to fire challenging biomass fuels - including high-moisture content fuels up to 50-55% moisture - that conventional fixed-grate boilers cannot handle efficiently.

With over 2,500 working installations worldwide and CBL's full suite of global certifications, this boiler is the choice for industries requiring large-scale, fuel-flexible, reliable steam and power generation from biomass and agro-waste fuels.

Multi-Fuel Biomass Capability

The Reciprocating Grate Boiler is designed for complex and versatile biomass fuels. The following fuels can be fired:

• Paddy Straw - Bale feeding system available
• Mustard Straw / Husk
• Coffee Husk
• Palm Fiber
• Coconut / Palm Waste
• Lignin Wet Cake
• Wood Chips
• Crushed Briquettes
• Ground Nut Shell
• Herbal Waste
• Rice Husk, Cotton Stalks, Bagasse, and other agro-waste fuels

Key Design Features

• Three Pass Water Wall design - maximises heat transfer across the full combustion path
• Tall and multi-pass furnace - increases flue gas residence time, ensuring complete combustion before entering convection heating surface
• Hydraulically driven reciprocating grate - fixed and moving bars alternate at regular intervals; movable bars reciprocate via hydraulic drive, pushing fuel forward uniformly and discharging ash regularly
• Four-zone grate management -Drying Zone, Combustion Zone, Post-combustion Zone, and Ash Zone, with independent air/speed control for each section
• Fires fuels with 50-55% moisture - grate design dries fuel progressively before combustion zone
• High-pressure deep-penetration secondary air jets - strategically placed at multiple levels in furnace walls for proper turbulence, volatiles mixing, and complete combustion
• Less choking - uniform fuel movement prevents bridging and blockages
• Less ash residue- complete combustion minimises unburnt carbon in ash
• Optimum gas velocity across water wall - reduces erosion and increases heat transfer coefficient
• Rotary feeder with fuel spreader - consistent, even fuel distribution across the full grate width
• Economiser fitted - recovers heat from flue gases for feedwater preheating, improving overall boiler efficiency

CBL Certifications & Quality Standards

Ideal Applications

• Textile clusters and large textile mills - high steam demand with biomass fuel availability
• Paper and board mills - using wood chips, bark, and agro-waste fuels
• Sugar mills and distilleries - bagasse and spent wash fired cogen plants
• Rice mills - paddy straw bale firing with rice husk
• Captive Power Plants (CPP) - biomass-to-power for large industrial consumers
• Co-generation plants - simultaneous process steam and power generation from biomass
• Industrial clusters with organised biomass fuel supply chains

Why SEACPL for Reciprocating Grate Projects

Reciprocating boiler projects are complex - involving civil foundations, structural steel, fuel handling systems, ash handling, pollution control integration, and electrical/instrumentation tie-ins. SEACPL's turnkey project execution capability means we can take single-point responsibility for the full system - from feasibility assessment through commissioning and operator training.

For large biomass boiler projects, SEACPL conducts a detailed fuel assessment before any capacity recommendation - covering fuel availability, moisture variation, calorific value, ash characteristics, and seasonal supply reliability. Getting this right at the outset prevents the costly performance shortfalls that plague incorrectly specified biomass boiler installations.