To receive a useful proposal from a circulating fluidized bed (CFB) boiler supplier, send a clear description of your required steam or heat output, fuel, operating conditions, emissions requirements, site constraints, and project scope. Include the design and operating values you know, identify estimates, and flag information that is still undecided. This helps the supplier assess whether the proposed boiler configuration fits your process and what additional engineering information is needed.
I recommend preparing one structured inquiry package rather than sending a capacity figure alone. A CFB boiler’s design depends on the interaction between fuel properties, load profile, steam conditions, environmental limits, and site interfaces. Use the checklist below to organize your request to Genjux or another supplier.
State whether you need steam, hot water, or another thermal output, and describe how it will be used. For steam service, provide the required flow rate, pressure, temperature, and whether the steam is saturated or superheated. If you do not have final values, give the current estimate and explain how it was established.
Share both normal and peak demand where available, along with expected minimum load and how quickly the plant may need to respond to changes. For example, a request might state “25 t/h at 10 bar(g)” as an initial process requirement, but these figures are illustrative only and should not be treated as a recommended CFB boiler design. Ask the supplier to confirm the design basis and identify any assumptions in its proposal.
Describe planned operating days, annual operating hours, start-up frequency, shutdown frequency, and seasonal variation. An estimate such as 8,000 operating hours/year can help frame a proposal, but state whether it is a target, forecast, or historical figure. Also explain whether the boiler will operate continuously, follow process demand, or work alongside other boilers.
Tell the supplier how much redundancy your process requires and what happens when the boiler is unavailable. Identify whether you need a single unit, multiple units, or integration with an existing steam network. These details affect the package boundary and operating concept, so they should be explicit rather than left to assumption.
List every fuel you expect to use, including primary, secondary, and backup fuels. For each one, provide the expected share of the blend and note whether the proportions change by season or supply source. CFB technology may be considered for different solid fuels, but a supplier still needs fuel-specific data to assess combustion design and auxiliary requirements.
Attach a representative fuel analysis when available. Useful parameters may include as-received moisture, ash, volatile matter, fixed carbon, heating value, sulfur, chlorine, and relevant ash chemistry. State the analytical basis and units, and provide minimum, typical, and maximum values when the supply varies. If laboratory data is not available, identify the fuel source and ask what testing the supplier needs before finalizing the design.
Provide particle-size distribution, bulk density, delivery method, storage capacity, and any known handling challenges, such as bridging, dust, or inconsistent sizing. Explain whether fuel arrives by truck, rail, conveyor, or another method, and where unloading and storage equipment should sit relative to the boiler. If you need the supplier to include fuel preparation or feeding equipment, state that in the requested scope.
Describe how you expect bottom ash and fly ash to be handled, stored, transported, and disposed of or reused. Share any site-specific residue requirements or restrictions that are already known. Avoid assuming that one generic fuel description is sufficient when the actual supply may vary significantly.
Identify the applicable jurisdiction and provide the emissions limits, permit conditions, or project criteria that the supplier must consider. Include the relevant pollutants and any specified averaging period, reference oxygen level, measurement basis, or fuel basis when these are defined by your project. A value such as 100 mg/Nm³ is meaningful only when its pollutant, reference conditions, and measurement basis are clear, so do not send isolated numbers without context.
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State whether emissions control equipment should be included in the proposal, and list any known requirements for monitoring, sampling ports, or reporting interfaces. If permits are pending, label the limits as provisional and share the expected date for confirmation. The supplier can then distinguish confirmed requirements from assumptions that may affect equipment selection and price.
Provide the project location, elevation if known, ambient temperature range, humidity or weather constraints, and any relevant seismic, wind, or local design requirements. Send available plot plans, building dimensions, access limitations, foundation information, and restrictions on stack height or equipment placement. Mark existing equipment and tie-in points where possible, even if the drawings are preliminary.
List available electrical supply, instrument air, water quality and flow, drainage, and other utilities relevant to the package. Include voltage and frequency where confirmed, and identify utility limits or outages that could affect operation. If the boiler must connect to existing systems, provide the interface pressure, temperature, flow, and connection information available to your team.
Specify what you expect the supplier to provide: boiler pressure parts, combustion system, fuel feeding, air systems, ash handling, flue-gas treatment, stack, controls, installation, commissioning, or operator training. State which items will be supplied by your company or another contractor. A simple battery-limit list can prevent gaps or duplication in the commercial proposal.
Describe control-room preferences, communication protocols, existing distributed control system requirements, and the level of automation expected. Identify whether you require drawings, operating manuals, maintenance information, spare-parts recommendations, or training as deliverables. If a particular document format or review schedule is required, include it with the inquiry.
Share the project stage, target dates for technical review and purchase, expected delivery window, installation plan, and site access constraints. Ask the supplier to state its proposed delivery basis, exclusions, warranty terms, and any assumptions that affect price or schedule. Commercial comparisons are more useful when all bidders price a clearly defined scope.
Tell the supplier what you need in the first response, such as a preliminary technical proposal, budgetary quotation, equipment list, layout, or list of missing inputs. You can also request separate pricing for optional equipment or alternate configurations. This makes it easier to compare solutions without treating preliminary estimates as final commitments.
Create a table with each requirement, its value, unit, source, and status. Add a notes column for operating range, uncertainty, or follow-up actions. Attach fuel analyses, process diagrams, plot plans, utility data, and permit documents when available, and use consistent revision labels so the supplier can identify the latest information.
Before sending the package, check that steam conditions match the process documents, fuel figures use a stated basis, and emissions requirements include their measurement conditions. Where data is unavailable, write “to be confirmed” rather than leaving a blank that could be interpreted as zero or not applicable. Invite the supplier to list its assumptions and outstanding questions in the proposal.
Send the information that defines the boiler’s duty, fuel, operating pattern, emissions basis, site conditions, utility interfaces, and required supply scope. Include measured or confirmed values where possible, clearly mark estimates, and provide supporting drawings and analyses. These inputs give a CFB boiler supplier a practical basis for preparing a relevant proposal and identifying what still needs engineering review.
Genjux can review your project requirements and help identify the technical information needed for a CFB boiler proposal. Prepare your specification register and supporting documents, then contact our team to discuss the application, package boundaries, and next steps for your inquiry.
If you want to learn more, please visit our website What Specifications Should You Send to a CFB Boiler Supplier?.