90 mm biomass briquettes—often called white coal or bio-coal—are the most widely used, standardized solid biofuel format in Indian industry. Built for effortless handling and stable combustion, the 90 mm diameter works perfectly with manual and semi-automatic feeders on package boilers, thermic fluid heaters (TFHs), hot-air generators, kilns, and gasifiers. At Bhavishya Biofuels, we manufacture and supply high-GCV, low-ash 90 mm briquettes made from carefully selected agro residues and clean woody by-products, backed by batch-wise QA so your steam curves stay predictable.

What Exactly Is a 90 mm Briquette?

A 90 mm briquette is a densified log of biomass with a nominal diameter of 90 ± 2 mm and controlled length. Densification multiplies the bulk density of loose residues, making transport cheaper per delivered kcal and improving firing stability. The format suits a wide range of feedstocks—groundnut shell, cotton stalk, sawdust, paddy straw, wheat straw, sugarcane trash—each selected or blended to match your boiler and emissions targets. Operators searching for “90mm biomass briquettes,” “bio coal 90mm,” or “white coal briquettes” typically want consistent size, reliable GCV, and low ash—precisely what this format delivers.

Why Choose 90 mm Briquettes for Your Boiler House?

• High energy per truck: Densification raises bulk density, lowering freight per kcal and yard footprint.
• Low, manageable ash: Compared with many solid fossil fuels, low ash biomass fuel reduces housekeeping, hopper evacuation, and downtime.
• Fast ignition, steady flame: Uniform size and moisture help you hold stable steam pressure and smooth TFH temperature ramps.
• Compatible with existing equipment: Works with manual and semi-auto feeders, step grates, moving grates, and many AFBC lines after size prep.
• Cleaner stack profile: Biomass has naturally low sulfur; paired with cyclones/bag filters you get cleaner stacks and easier compliance.
• Spec-driven procurement: You can buy against declared parameters aligned to solid biofuel norms (moisture, ash, GCV, size, durability, fines).

Typical Specifications We Supply (Guidance Ranges)

Exact values depend on feedstock and season. We recommend specifying ranges and requesting truck-wise QA.

• Diameter: 90 ± 2 mm
• Length: Typically 60–150 mm (matched to feeder pockets)
• Gross Calorific Value (GCV, as-received): High for densified agro/woody fuels; we declare a minimum target on every lot
• Moisture (as-received): Usually single digits to low-teens depending on crop and storage
• Ash: Feedstock-dependent (typically modest for clean residues); blends available for ash behavior optimization
• Fines at dispatch: Kept low via careful handling and stacking
• Bulk density: Significantly higher than loose residues, improving ₹/kcal freight efficiency

Feedstock Options & How They Affect Performance

• Groundnut shell briquettes: Popular for strong GCV and reliable flame stability. Good for package boilers and TFHs.
• Cotton stalk briquettes: Lignin-rich woody fiber that densifies well; a versatile, widely available industrial biomass fuel in cotton belts.
• Sawdust briquettes: Clean, low-ash briquettes from virgin wood residues; excellent for cleaner stacks and controlled combustion.
• Paddy/wheat straw briquettes: Abundant and economical; can be blended to fine-tune ash fusion behavior for grate/AFBC systems.
• Custom blends: We can tailor blends (e.g., groundnut shell + wood) to balance GCV, ash %, and ash fusion temperature for your specific boiler.

Best-Fit Applications

• Textiles & dyeing: Stable steam generation on package boilers and TFHs; easier SO₂ compliance versus high-sulfur fuels.
• Food & beverage: Dal mills, namkeen, spices, bakeries, distilleries, and dairy plants benefit from predictable heat and low ash.
• Paper & board, chemicals, pharma: Clean, controllable heat input with manageable particulate load.
• Bricks & ceramics: Longer burn cycles with dense briquettes that charge easily and burn steadily.
• Co-firing & gasifiers: Briquettes pre-processed to required size distribution can feed AFBC/CFBC lines and down-draft gasifiers (project-specific).

Combustion & Boiler-Tuning Tips (Engineer-Approved)

• Fuel reception & storage: Keep briquettes dry on pallets or sleepers. Use roofed, ventilated storage and a FIFO inventory to stabilize moisture.
• Feeding: Match briquette length to feeder pocket size; keep feed chutes clear. For AFBC, pre-crush or chip if OEM recommends finer sizing.
• Air management: Begin with excess-air settings similar to rice-husk/mixed-agro firing. Trim using stack O₂/CO to cut unburnt carbon and stabilize pressure.
• Bed temperature (FBC): Run within OEM windows to avoid sintering. If clinkers appear, explore a wood-rich blend to raise ash fusion temperature.
• Particulate control: Multicyclones or bag filters efficiently manage the lower-ash particulate; maintain hopper evacuation schedules.
• Safety: Enforce spark arrestors and no-smoking zones; maintain dust housekeeping around conveyors and hoppers.

How 90 mm Briquettes Compare with Pellets

• Handling & feeding: 90 mm briquettes are ideal for manual/semi-auto feeders and open yards. 6–8 mm pellets suit pneumatic/screw feeding with silos.
• Freight economics: Both are dense, but briquettes often deliver excellent ₹/kcal freight in standard FTLs without silo infrastructure.
• Process control: Pellets offer ultra-tight size distribution for automated lines; briquettes deliver robust, forgiving operation on grates and TFHs.
• Capex: Briquettes typically need lower feeding Capex; pellets favor plants planning automated fuel systems.

Costing the Switch: ₹/kcal, Not Just ₹/ton

Comparing briquette price India to coal or FO/LDO only on a ₹/tonne or ₹/litre basis hides the real story. For a fair comparison, calculate ₹/kcal delivered to the boiler house, then add:

• Housekeeping and ash disposal savings from low ash biomass fuel
• Filter maintenance and stack compliance benefits from low sulfur
• Operator time saved due to consistent size and steady feeder behavior
• Any avoided environmental surcharge or fossil-fuel levies (project-specific)

Most plants see total-cost-of-heat advantages once these factors are accounted for—especially where freight lanes are optimized and moisture control is tight.

Quality Assurance, Standards & Documentation

To keep procurement and boiler teams aligned, we declare key parameters similar to widely used solid biofuel standards for non-woody and woody fuels. Every dispatch can include a pre-dispatch QA sheet (moisture, ash, GCV) along with truck-wise batch tagging for traceability. Need plant-gate testing? We coordinate third-party sampling at your site so energy balance and stack readings line up with the paperwork.

Logistics & Monsoon Readiness

• Loads: Full-truck loads (FTL), tarpaulin covered; stacking designed to minimize breakage.
• Unloading: Forklift or manual handling depending on site; we align bundle size and palletization (if used) with your bays.
• Monsoon SOPs: Rapid unloading, side sheeting, elevated storage, and daily moisture checks to protect as-received GCV.

Purchase Specification Template (Copy-Ready)

• Fuel Type: 90 mm biomass briquettes (white coal/bio-coal)
• Feedstock: Groundnut shell / Cotton stalk / Sawdust / Paddy straw / Wheat straw / Sugarcane trash / Custom blend (select)
• Diameter: 90 ± 2 mm
• Length: 60–150 mm (state feeder preference)
• Moisture (as-received): ≤ target % (state max)
• Ash: ≤ target % (state max, feedstock-dependent)
• GCV (as-received): ≥ target kcal/kg (state minimum)
• Fines at delivery: ≤ target % below chosen sieve (state limit)
• Packaging: Bulk FTL with tarpaulin; palletization/jumbo bags on request
• QA: Pre-dispatch moisture, ash, GCV report; optional third-party testing
• Delivery: Pan-India; schedule and minimum order quantity as per contract

FAQs (SEO-Friendly for Buyers & Boiler Teams)

What is a 90 mm briquette used for?

The 90 mm briquette format is the standard for biomass briquettes for boilers, TFHs, hot-air generators, and kilns. It’s easy to feed, store, and transport, making it a favorite for plants migrating from coal and FO/LDO.

What is the GCV of biomass briquettes?

GCV of biomass briquettes varies by feedstock and moisture. We supply lots with a declared minimum GCV and batch-wise lab sheets so your energy balance stays transparent.

What ash level should I expect?

Ash depends on the crop and season. Clean woody residues tend to be lower; some agro residues have moderate ash. We can propose wood-rich blends if your boiler is sensitive to ash fusion behavior.

Are 90 mm briquettes suitable for AFBC/CFBC?

Yes—typically after pre-crushing/chipping to the particle size your bed requires. Many clients also use briquettes upstream of pelletization for co-firing programs.

How do I store briquettes during monsoon?

Use roofed, ventilated storage, keep stacks off the floor, and follow FIFO. Quick unloading and extra side sheeting preserve moisture targets and as-received GCV.

Pellets vs 90 mm briquettes—what should I choose?

Pellets (6–8 mm) suit automated screws/silos and tight process control. Briquettes (90 mm) shine where low Capex feeding and excellent ₹/kcal freight are priorities.

What affects briquette price India most?

Feedstock availability, seasonality, freight lanes, and moisture targets. Our multi-region sourcing and buffer stocks help keep pricing competitive through the year.

Can I order specific blends?

Yes. We tailor groundnut shell briquettes, cotton stalk briquettes, sawdust briquettes, and mixed recipes to meet your boiler’s GCV and ash behavior targets.

Why Bhavishya Biofuels

• Spec consistency: Tight control of moisture, size, durability, and fines for predictable combustion.
• Feedstock integrity: Clean, traceable agro/woody inputs; no contaminated wood or mixed waste.
• Pan-India reach: Aggregated sourcing across major agri belts and wood hubs for dependable volumes.
• QA & documentation: Truck-wise batch tagging, lab sheets, and optional third-party testing aligned to your SOPs.
• Technical support: Start-up assistance, feeder tuning, air-fuel balancing, and blend recommendations for grate and AFBC systems.

Helpful Search Phrases We Naturally Cover

To capture real buyer intent, this page integrates high-intent terms such as: 90mm biomass briquettes, 90 mm briquette, bio coal 90mm, white coal briquettes, biomass briquettes for boilers, briquette price India, biomass fuel suppliers India, GCV of biomass briquettes, low ash biomass fuel, thermic fluid heater fuel, AFBC fuel, CFBC co-firing, groundnut shell briquettes, cotton stalk briquettes, sawdust briquettes, industrial biomass fuel India. These map to common procurement and engineering queries while keeping the copy reader-friendly.

Call to Action

Ready to trial 90 mm briquettes? Share your boiler type (grate, stoker, AFBC), daily steam demand, and preferred feedstock. Bhavishya Biofuels will propose the right spec, schedule a pilot lot, and deliver quickly—so you can benchmark heat rate, ash behavior, and total ₹/kcal against your current fuel.