Products

Smoke/Fire Tube Boiler

Description

A three-pass fire-tube boiler is a type of steam or hot water boiler that uses hot gases from combustion to pass through the tubes, transferring heat to the water or steam on the outside. Here’s a brief overview of its features and functioning:

 

Design

  • Smoke Tubes: The boiler consists of a series of tubes (smoke tubes) that carry the hot gases from the combustion process through the water.
  • Water Shell: Surrounding the smoke tubes is a shell filled with water. The heat from the gases transfers to the water, converting it to steam.
  • Fuel Source: Typically, these boilers can burn various fuels, including natural gas, oil, or biomass.

Categories

Oil And Gas Smoke/Fire Tube Boiler
Solid Fuel Smoke/Fire Tube Boiler

Specifications

Key Features:

  • Three Pass Design:
    • First Pass: Hot flue gases enter the boiler and flow through the tubes, transferring heat to the water.
    • Second Pass: Gases reverse direction and flow back through a second set of tubes, enhancing heat transfer.
    • Third Pass: Gases exit through the final set of tubes, maximizing heat exchange before leaving the system.
  • Efficiency:
    • The design improves thermal efficiency by maximizing the surface area for heat exchange, often reaching efficiencies above 90%.
  • Compact Size:
    • Typically, more compact than water-tube boilers, making them suitable for smaller installations.
  • Ease of Maintenance:
    • Generally simpler to clean and maintain due to their design.
  • Applications:
    • Fire smoke tube boilers are commonly used in industries like food processing, textiles, and manufacturing, where steam is essential for various processes.

Working Principle:

  • Combustion: Fuel is burned in the furnace, producing hot gases.
  • Heat Transfer: The hot gases pass through the tubes, transferring heat to the water outside the tubes.
  • Steam Generation: The heated water turns into steam (if applicable), which is then directed to the process or heating system.
  • Exhaust: The cooled flue gases exit the boiler through the stack.

Advantages:

  • High Efficiency: Effective heat recovery leads to lower fuel consumption.
  • Lower Emissions: Improved combustion efficiency can result in reduced emissions.
  • Versatile Fuels: Can burn various fuels, including natural gas, oil, and biomass.

Considerations:

  • Sizing: Proper sizing is crucial for efficiency and operational effectiveness.
  • Water Treatment: Proper water treatment is essential to prevent scaling and corrosion.