Reciprocating Grate Boiler

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

• 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

• 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

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.