Industrial Biomass Solid Fuel Boiler Systems

One unique feature of SCS is that not only do we design and manufacture our own boiler systems but we rehabilitate and maintain all manufacturers boiler systems. We have a full service ASME code pressure part shop that can provide replacement boiler tubes, whether just a few tubes for those unscheduled emergencies or a complete set of boiler tubes, super heater tubes, super heater modules, headers and drums.

SCS designs and manufactures utility and industrial grade stoker grate combustion systems with output capacities ranging from 10,000 to 650,000 PPH (pounds per hour of steam). With over 24 years of experience in stoker grate technology, SCS is recognized for delivering the highest quality systems at the lowest possible capital cost — a combination rarely found in the industrial boiler marketplace.


Stoker grate systems are the preferred combustion solution when fuel flexibility and low operational costs are the priority. They perform best with solid fuels under 55% moisture content, including wood waste, agricultural residue, bark, coal, and tire-derived fuels, and are especially well suited for low ash fusion or high alkali content fuels that can cause slagging in competing technologies. Available configurations include 2-drum bottom-supported and 2-drum top-supported designs, each engineered for the specific fuel and operating conditions of your facility.

SCS

Stoker Grate Boiler Systems

Through SCS's acquisition of the McBurney Corporation, we now offer the proven Modul-Pak® hybrid biomass boiler — a unique design that combines the advantages of a watertube furnace with a multipass firetube boiler. The upper watertube furnace water-cools the primary combustion chamber, reducing flame temperature before gases enter the firetube section, resulting in a highly efficient and thermally balanced system.


The Modul-Pak® supports a wide range of firing configurations, including gas and oil burners, stationary grates, and continuous ash discharge stokers such as air and water-cooled vibrating grates. It is an ideal choice for industrial facilities seeking a compact, adaptable boiler that can handle multiple fuel types while keeping both capital and maintenance costs in check.

SCS

Firetube Boiler Systems

SCS offers utility and industrial grade Bubbling Fluidized Bed (BFB) boiler systems capable of producing 35,000 to 400,000 PPH of saturated or superheated steam. BFB technology is the go-to combustion solution for facilities burning high-moisture fuels or fuel blends that are poorly suited to grate-based systems — including paper mill sludge, biomass with high moisture content, agricultural residues, and a broad range of process wastes.



Compared to other combustion technologies, BFB systems deliver inherently lower uncontrolled emissions of NOx, SOx, CO, VOCs, and particulate matter, along with higher combustion efficiency and reduced long-term fuel consumption. The open bottom design minimizes maintenance downtime and extends bed material life. SCS provides full turnkey delivery for BFB projects, covering engineering, design, fabrication, procurement, construction, and ongoing aftermarket services.

SCS

Bubbling Fluidized Bed Boiler Systems

Frequently asked questions

  • What types of solid fuel boilers does SCS manufacture?

    SCS designs and manufactures three primary types of industrial solid fuel boiler systems: Stoker Grate boilers, Firetube boilers (Modul-Pak®), and Bubbling Fluidized Bed (BFB) boilers. Each technology is suited to different fuel types, moisture content ranges, steam output requirements, and capital cost targets. SCS can help you determine which system is the right fit for your facility and operating conditions.

  • What steam output capacities are available?

    SCS solid fuel boiler systems are available across a wide output range. Stoker grate systems are offered from 10,000 to 650,000 PPH (pounds per hour of steam), while BFB systems range from 35,000 to 400,000 PPH. Both saturated and superheated steam configurations are available. Contact SCS to discuss the specific pressure and temperature requirements for your application.

  • What fuels can a solid fuel boiler burn?

    SCS boiler systems are engineered for broad fuel flexibility. Supported fuel types include wood waste (bark, forestry and pulp mill residue), agricultural residue (bagasse, stover, rice hulls), coal, peat, paper mill sludge, poultry litter, tire-derived fuels, landfill gas, natural gas, oil, and a range of process wastes from industries such as furniture manufacturing and construction and demolition. BFB systems are particularly well suited to high-moisture fuel blends and diverse fuel sources, while stoker grate systems excel with fuels under 55% moisture content.

  • What is the difference between a stoker grate boiler and a Bubbling Fluidized Bed (BFB) boiler?

    The primary differences come down to fuel characteristics, emissions, and efficiency. Stoker grate systems offer the lowest capital costs and are the best option for fuels with low ash fusion temperatures, high alkali content, or moisture content below 55% — conditions that can cause slagging in a BFB system. BFB systems, on the other hand, are better suited to high-moisture fuels and deliver inherently lower uncontrolled emissions of NOx, SOx, CO, VOCs, and particulate matter, along with higher overall combustion efficiency. SCS engineers can walk you through the trade-offs based on your specific fuel profile and project requirements.

  • Does SCS handle the full project, or just equipment supply?

    SCS provides complete turnkey project delivery, covering engineering, design, fabrication, procurement, construction, general contracting, and commissioning. Beyond installation, SCS also offers full lifecycle aftermarket support including preventive and corrective maintenance, inspections, reliability services, and spare parts — for both SCS systems and equipment manufactured by others.

  • Does SCS service boilers it didn't manufacture?

    Yes. SCS provides maintenance, inspections, replacement parts, and aftermarket services for industrial boiler systems from all major manufacturers, not just SCS equipment. This includes emergency and planned outage support, ASME code repairs, and boiler MACT compliance work.

  • What industries does SCS serve?

    SCS serves independent power utilities, pulp and paper mills, wood products manufacturers, biomass energy facilities, and a broad range of industrial plant operators across North America. If your facility generates or relies on steam or process heat, SCS has likely worked in your sector.

  • How do I request a quote or get started?

    Fill out the contact form on our Request a Quote Page, call us at 423.624.1727, or email info@scsenergy.com. To help SCS prepare an accurate quote, it's helpful to include your required steam output range, fuel type, and project type — but if you're still in the early scoping stage, our engineering team is experienced at helping customers define requirements from the ground up.