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HYBRID BIOMASS STEAM BOILER

VME hybrid boiler with a firetube body and tall watertube furnace.

A single-pass convection section, water-cooled Pin-Hole grate and suspension firing create a robust route for low-quality biomass with up to 60% moisture on a wet basis and a lower heating value from 1,450 kcal/kg.

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Side view of a Steammaster VME hybrid boiler
VME boiler during factory assembly Tall VME furnace installed at an industrial site Technical view of the VME Pin-Hole grate Waterwall panel used in the VME watertube furnace
SINGLE-PASS FIRETUBE BODY PIN-HOLE GRATE

Tall furnace volume for suspension firing.

Because a large share of the fuel burns while suspended in the furnace, the grate requires less area. The VME therefore uses a narrower section and greater height to provide gas residence time above 2 seconds, very low upward gas velocity and reduced particle carryover.

  • Suitable for bagasse, wood chips, peanut shells and a broad range of biomass residues.
  • The water-cooled grate and suspension firing form a world-class arrangement for bagasse and varied biomass residues.
  • No refractory lining in the furnace and no ash accumulation points.
  • Optional superheater installed in the furnace, with radiant and convective heat absorption, for higher steam temperatures.
  • Alternatively, the superheater can be installed downstream of the convection section, supporting simpler operation, conventional materials and longer service life.

HYBRID ARCHITECTURE

Firetube convection simplicity with a large watertube furnace.

The VME combines a single-pass firetube convection body with a high-volume vertical watertube furnace. This simple arrangement supports high combustion performance, low gas-side pressure drop, practical maintenance and a strong cost-benefit ratio for large biomass steam duties.

Technical envelope

Steam capacity15 to 50 t/h
Operating pressureUp to 38 bar(a)
Steam temperatureUp to 380 °C
Average thermal efficiency86%
Combustion efficiencyMay exceed 98%, depending on fuel moisture and characteristics
Fuel moistureUp to 60% on a wet basis
Minimum reference LHV1,450 kcal/kg
Gas pathAscending furnace + single-pass firetube body

General characteristics

  • Gas-side pressure drop up to four times lower than conventional boiler arrangements.
  • Lower component wear, lower biomass consumption and high annual availability.
  • Low maintenance demand and fewer shutdowns for ash and particulate cleaning.
  • The largest vertical furnace in the market, fully refractory-free and designed for safer access and routine work.
Tall VME furnace structure during field installation

High-temperature combustion air

The single-pass firetube body can be configured to deliver an appropriate flue-gas temperature at the air-preheater inlet. Combustion air above 250 °C supports stable burning of wet biomass and helps eliminate refractory linings from the furnace.

This combination of high-temperature combustion air and a refractory-free furnace is established in high-performance boilers used by Brazilian sugar and ethanol plants. Steammaster has applied the concept for decades in successful operating projects.

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Temporary reference model: this viewer currently uses the VMIC-RG geometry only to demonstrate navigation and approximate boilerhouse integration. It is not the final VME geometry.

TEMPORARY 3D REFERENCE

Interactive navigation while the VME-specific model is prepared.

Use the controls to understand the viewer experience. Dimensions, furnace proportions, grate arrangement and access geometry must be confirmed from the future VME model and detailed engineering.

Discuss the VME configuration Request VME documents

PRELIMINARY ENGINEERING

Final performance depends on the real biomass and operating profile.

Capacity, efficiency, emissions, auxiliary systems and service intervals must be confirmed from fuel analysis, moisture, ash behavior, steam conditions, load profile and local requirements. The values on this page describe the product family and do not replace a project-specific proposal.

Information for technical selection

  • Required steam flow, pressure, temperature and load profile.
  • Fuel type, particle size, moisture, LHV and ash analysis.
  • Available boilerhouse space, logistics and local emission limits.

Next recommended step

Send the operating requirements and a representative biomass analysis so Steammaster engineering can confirm the VME configuration, fuel preparation, air preheater, gas-cleaning route and complete boilerhouse scope.

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