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Fireboxes

Fireboxes for Heaters and Furnaces

Engineering and fabrication of fireboxes, burner assemblies and flue-gas paths for heater repair, replacement or upgrade.

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Heater firebox during fabrication
Heater firebox during fabrication

Purpose

Provide stable combustion of the specified fuel at the required heat release while meeting process-safety requirements.

Arrangement and integration

Equipment functional diagram

The diagram identifies the principal process duties, equipment connections and product handover points. Final scope, redundancy and battery limits are established from project data.

FireboxesFirebox functional arrangementArrangement and scope diagram
Fireboxes for Heaters and Furnaces: Firebox functional arrangementPackage boundaryFuel and airBurner assemblyCombustionchamberFlue-gas pathFlue gas
Fuel gas

A typical equipment arrangement is shown. Final execution, redundancy and valve scope are established during engineering.

Engineering basis

Design parameters

Final ratings, materials and supply scope are established from project-specific operating data.

Applicable heater typesPP, PBT, PNK and PPT*
Fuel heating value35–60 MJ/m³*
Heat duty0.1–10.0 MW*
Thermal efficiency80–90%*
Design life10 years*
Typical overhaul interval3.5 years*

Process functions

Principal process duties

  • Heat-release and combustion design
  • Burner and ignition-system selection
  • Flame and draft monitoring with safety shutdown

Typical scope

Main equipment

  • 01

    Combustion chamber and project-specific refractory

  • 02

    Main burner, pilot and ignition assembly

  • 03

    Fuel train with isolation and control valves

  • 04

    Flue-gas path, instrumentation and burner-management system

Questionnaire

Data required for engineering

Worked examples and vessel-volume fields are retained. Use them as guidance or provide parameters from an existing design.

Fireboxes questionnaire
  1. 01

    Process fluid and physical properties

  2. 02

    Flow, pressure and temperature for all cases

  3. 03

    Required process result and allowable pressure drop

  4. 04

    Materials, climate and installation category

  5. 05

    Dimensional constraints, battery limits and automation requirements

Proposal request

Operating data for a technical and commercial proposal

Attach the completed questionnaire or provide the principal operating data below. Equipment scope, design ratings and battery limits follow engineering review.

Email the questionnaire, specification and attachments

Related scope

Equipment in the same category