Up to 300 TPH
Dumping Grate Boilers

Dumping Grate Boilers

Offering a robust, reliable solution for efficiently burning diverse solid fuels

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Dumping grate boilers feature stationary grate design with intermittent ash discharge for simplified operation and reduced maintenance.

The stationary grate minimises continuous wear and tear. Ash is discharged intermittently, providing controlled removal of accumulated ash and clinker directly into the ash pit. Simple construction reduces maintenance needs, while periodic ash removal prevents clinker buildup and enhances furnace cleanliness.

Technical data

  • Product capacity / performance range –

    • Capacity range: Up to 300 TPH

    • Pressure: Up to 160 kg/cm²(g)

    • Temperature: Up to 560°C

  • Fuel type or energy sources – Bagasse

  • Compliance or standards followed – ASME / IBR / PED / TRCU

  • Design – 

  • Dumping grate combustion technology

    • Vertical & horizontal models

  • Flexibility or customisation options – The product can be customised based on customer needs or scale

  • Other technical information –
    Can be offered as:

    • Boiler island

    • Boiler-turbine-generator (BTG) package

    • Turnkey power plant (EPC)

Product features

Intermittent ash removal (dumping action)
The intermittent dumping action periodically releases accumulated ash and clinker directly into an ash pit below
Stationary or semi-stationary operation
Dumping grates remain largely stationary during combustion
Simple construction & maintenance
Fewer moving parts result in easier maintenance and lower capital cost
Optimised combustion in tall furnace
Significantly increases flue gas residence time, ensuring complete fuel combustion before gases enter the superheater
Complete volatile combustion with over-fire air
An over-fire air system provides essential turbulence and thorough mixing of volatile gases, ensuring complete combustion
90% on NCV Up to 560°C Up to 160 kg/cm²(g)
Up to 300 TPH
Reciprocating Grate Boilers

Reciprocating Grate Boilers

High-efficiency, low-maintenance solution with fuel flexibility for demanding agro, industrial, and waste applications

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TBWES' reciprocating grate boilers are ideal for combustion of fuels having high moisture, low calorific value, and irregular or oversized particles

The reciprocating grate (pusher grate) combustion technology ensure efficient and complete combustion through continuous fuel agitation. The tumbling action enhances mixing, improves burnout, and accommodates variable fuel sizes and moisture content. Featuring flexible designs, multi-fuel firing capability, optimised furnace design, modular grate construction and precision airflow control, our boilers are highly suitable for high-moisture agricultural waste, non-recyclable solid waste and other industrial process waste

Technical data

  • Product capacity / performance range –

    • Capacity range: Up to 300 TPH

    • Pressure: Up to 160 kg/cm²(g)

    • Temperature: Up to 560°C

  • Fuel type or energy sources – 
    Bagasse, biogas, biomass, cane leaves, coco husk, coconut chells, coffee grounds, corn cob, cotton stalk, de-oiled rice bran (DORB), empty fruit bunch (EFB), ground nut shell, julia flora oil, king grass, maize stalk, mustard husk, napier grass, palm fibre, palm kernel shell, palm waste, paper sludge, pith, red gram stems, rice husk, rice straws, roasted shaffs, saw dust, Straw, tapioca stem, wood chips, wood bark, spent wash (vinasse), etc.

  • Compliance or standards followed – ASME / IBR / PED / TRCU

  • Design -

  • Single-drum and bi-drum configurations

        - Site-assembled or partially modularised

        - Reciprocating grate combustion technology

  • Flexibility or customisation options –
    The product can be customised based on customer needs or scale

  • Other technical information –
    Can be offered as:

    • Boiler island

    • Boiler-turbine-generator (BTG) package

    • Turnkey power plant (EPC)

Product features

Multi-fuel compatibility
Supports a wide range of fuels for operational flexibility
Low-calorie, high-fouling, high-moisture & irregular waste compatibility
The furnace and convection zone are specifically designed to handle challenging fuels effectively
Reduced suspension burning
Mass burn technology minimises suspension burning and carry-over, ensuring more complete combustion
Flexible grate widths with scalable modular design
Modular grate construction enables larger section widths from 1.5 m to 3 m, with multiple sections assembled laterally to achieve greater overall widths
Versatile grate cooling options
Both air-cooled and water-cooled grate designs are available, tailored to specific fuel characteristics for optimal cooling
Optimised grate bar performance
Fully machined grate bars ensure proper clearances for thermal expansion, movement, and efficient airflow
Precision airflow control
Air plenum of each grate section is divided into multiple sections along the length, enabling independent control of airflow to each section as per combustion requirement
Variable grate speed control
Each grate section can be controlled individually with the help of VFD to ensure proper combustion of different variety of fuels ensuring complete fuel flexibility
Proven ram feeder design for handling bulky fuels
Hydraulically operated, water-cooled ram feeder ensures continuous waste input, even for bulky fuels, supported by a hydraulic ash extractor system, ensuring proper air sealing, thereby eliminating backfire
Corrosion & wear resistance
Special alloy castings provide superior resistance to corrosion and extend wear life
90% on NCV Up to 560°C Up to 160 kg/cm²(g)
Up to 300 TPH
Pinhole Grate Boilers

Pinhole Grate Boilers

Advanced pinhole grate boilers ensure efficient, reliable combustion for diverse industrial and agro-waste applications

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TBWES pinhole grate boilers feature water-cooled stationary grate, efficient ash removal, and optimised combustion for various challenging fuels.

Engineered for demanding industrial applications, our boilers minimise emissions, maximise energy recovery, and ensure stable, long-term operation. Precision over-fire air injection and optimised grate configurations provide exceptional combustion efficiency. Strategically placed steam nozzles enable online ash removal without pressure drops. This robust design also allows for hot air intake up to 250°C, ensuring smooth combustion, even for high-moisture bagasse and low-ash fuels.

Technical data

  • Product capacity / performance range –

    • Capacity range: Up to 300 TPH

    • Pressure: Up to 160 kg/cm²(g)

    • Temperature: Up to 560°C

  • Fuel type or energy sources – Bagasse, biogas, biomass, cane leaves, coco husk, coconut shells, coffee grounds, corn cob, cotton Stalk, De-oiled rice bran (DORB), empty fruit bunch (EFB), ground nut shell, julia flora oil, king grass, maize stalk, mustard husk, napier grass, palm fibre, palm kernel shell, palm waste, paper sludge, pith, red gram Stems, rice husk, rice straws, roasted chaffs, saw dust, straw, tapioca stem, wood chips, wood bark, spent wash (vinasse), etc.

  • Compliance or standards followed – ASME / IBR / PED / TRCU

  • Design – 

    • Single-drum and bi-drum configurations

    • Site-assembled or partially modularised

    • Pinhole grate combustion technology

  • Flexibility or customisation options – The product can be customised based on customer needs or scale.

  • Other technical information – 
    Can be offered as:

    • Boiler island

    • Boiler-turbine-generator (BTG) package

    • Turnkey power plant (EPC)

Product features

Static, water-cooled grate design
A stationary, inclined water-cooled grate design eliminates moving parts in the furnace, preventing mechanical failures and reducing maintenance
Efficient on-line ash removal & combustion enhancement
Steam nozzles enable simplified on-line ash removal without boiler pressure drops, simultaneously agitating fuel to reduce unburnt carbon loss
Economical for high-capacity boilers
This offers an economical and viable solution, particularly well-suited for high-capacity boiler applications
High-temperature air combustion capability
Efficiently handles preheated air up to 250°C, ensuring smooth and effective fuel combustion
High-moisture bagasse combustion
Inherently designed for and highly capable of efficiently burning high-moisture bagasse
Complete volatile combustion with overfire air
An overfire air system provides essential turbulence and thorough mixing of volatile gases, assuring complete combustion
Uniform fuel distribution
An adequate number of feeders ensures consistent and uniform distribution of fuel across the grate
Optimised for low-ash fuels
Particularly suitable for biomass fuels
90% on NCV Up to 560°C Up to 160 kg/cm²(g)
Up to 300 TPH
Travelling Grate Boilers

Travelling Grate Boilers

Known for precise control, robust design, fuel flexibility, low maintenance, high efficiency and continuous, reliable performance

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Travelling grate minimises excess air infiltration, enhancing combustion efficiency and fuel economy, while ensuring long-lasting, maintenance-free sealing through self-adjusting, rugged air seals.

Our travelling grate boilers feature a tall furnace for complete combustion and multi-level secondary air jets for enhanced mixing. The hydraulic / planetary gear drive with VFD offers precise speed control and high efficiency, even under heavy loads. A catenary and overlapping grate design prevents material leakage and air infiltration, while a continuous ash discharge system and over-fire air ensure complete, trouble-free operation.

Technical data

  • Product capacity / performance range –

    • Capacity range: Up to 300 TPH

    • Pressure: Up to 160 kg/cm²(g)

    • Temperature: Up to 560°C

  • Fuel type or energy sources – Bagasse, biogas, biomass, cane leaves, coal, coco husk, coconut shells, coffee grounds, corn cob, cotton stalk, de-oiled rice bran (DORB), ground nut shell, julia flora oil, king grass, maize stalk, mustard husk, napier grass, palm fibre, paper sludge, petcoke, pith, red gram stems, rice husk, rice straws, roasted chaffs, saw dust, straw, tapioca stem, wood chips, wood bark, paper sludge, etc.

  • Compliance or standards followed – ASME / IBR / PED / TRCU

  • Design – 

    • Single-drum and bi-drum configurations

    • Site-assembled or partially modularised

    • Travelling grate technology ensures uninterrupted combustion

  • Flexibility or customisation options – The product can be customised based on customer needs or scale

  • Additional technical information – 
    Can be offered as:

    • Boiler island

    • Boiler-turbine-generator (BTG) package

    • Turnkey power plant (EPC)

Product features

Optimised combustion in tall furnace
Significantly increases flue gas residence time, ensuring complete fuel combustion before gases enter the superheater
Catenary & overlapping grate design for efficiency
Catenary curvature keeps grates closed without the aid of auxiliary weights, preventing material leakage into the drive, while an overlapping design minimises air leakage
Hydraulic/planetary grate drive with VFD benefits
Planetary gear drive with variable frequency drive (VFD) enables higher transmission efficiency and fine speed control (10:1 turndown) for heavy-duty loads
Precise grate speed control
Achieves highly precise grate speed variation, continuously adjustable within a range of 
0-12 m / hr (0-45 ft /hr)
Multi-stage superheater with attemperation
Features a two or three-stage superheater with an inter-stage feedwater spray attemperator for precise steam temperature control
Multi-level secondary air injection
High-pressure, deep-penetration secondary air jets, strategically placed at multiple furnace levels, promote turbulence and thorough mixing for complete combustion of volatiles
Complete volatile combustion with over-fire air
Provides essential turbulence and thorough mixing of volatile gases, ensuring complete combustion
Automated continuous ash discharge
Reduces operator dependence and ensures consistent and efficient ash removal during operation
Online grate maintenance
Grate maintenance can be performed without requiring a boiler shutdown, ensuring continuous operation
90% on NCV Up to 560°C Up to 160 kg/cm²(g)
Subscribe to 90% on NCV

Registered Office Address

D-13, MIDC Industrial Area,
R. D. Aga Road, Chinchwad,
Pune 411019, Maharashtra, India

Corporate Office Address

Thermax Limited
Thermax House,
14 Mumbai-Pune Road, Wakdewadi,
Pune 411003, Maharashtra, India

Corporate Identity Number

L29299PN1980PLC022787

Toll Free Number

1800-209-0115

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