GE’s two-pass boiler is the workhorse of the power industry. It generates steam for today’s large-scale global power projects (up to 1,350 MWe) at pressures and temperatures that can reach the service limits of contemporary materials.

Increased efficiencies

High cycle efficiencies at ultra-supercritical conditions, reaching 44 to 47% on an LHV basis (42 to 45%), leading to cleaner operation and lowered fuel consumption.

Lowered emissions

Low primary NOx emissions using advanced tangential firing systems and effective overfire air arrangements, resulting in less reagent consumption and SCR catalyst material.

Enhanced Flexibility

Two-pass boilers have outstanding operational flexibility for temperature control, grid code requirements, sliding pressure capability, and load cycling. The boilers also feature reduced construction time and cost using advanced construction techniques and standard component design and fabrication.

Contact GE Power to learn more about two-pass boilers in steam power plants.

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Two-Pass Boiler

Radiant pendant surfaces are located above the furnace, and convective surfaces are arranged horizontally in the second pass. The two-pass heat exchanger configuration results in an efficient furnace height and a lower cost of construction. Our patented tilting tangential firing system accommodates the large spectrum of fuels found across the globe (multiple grades of coal, oil, gas, heavy residues, biomass and other opportunity fuels), and is a leader in primary emissions control.

Our patented tilting tangential firing system accommodates the large spectrum of fuels found across the globe (multiple grades of coal, oil, gas, heavy residues, biomass and other opportunity fuels), and is a leader in primary emissions control.

Contact GE Power to learn more about two-pass heat boilers.

Two-Pass Boiler Product Specifications

  Coal-fired Two Pass Boiler Oil and Gas–fired Two Pass Boiler
Fuel
  • Bituminous
  • Sub-bituminous
  • Lignite A
  • Oil (Heavy Fuel Oil, No. 2 Oil, No. 6 Oil, Crude Oil etc.)
  • Gas (Natural Gas, Coke Oven Gas, Blast Furnace Gas etc.)

Steam Cycle

  • Ultra-supercritical
  • Supercritical
  • Subcritical
  • Supercritical
  • Subcritical

Size (MWe)

  • Subcritical ≤ 800
  • USC/SC ≤ 1,350
  • Subcritical ≤ 800
  • SC ≤ 1,000
Superheater Outlet Steam Pressure (bar) ≤ 300 ≤ 250
Superheater Steam Temperature (°C) ≤ 605 ≤ 565
Reheater Steam Temperature (°C) ≤ 623 ≤ 565

Design Features

  • Tangential firing system
  • Fuel and air staging
  • Tilting burners
  • Vertical and spiral wall designs
  • Tangential firing system
  • Fuel and air staging
  • Tilting burners
  • Spiral wall designs

Contact GE Power to learn more about two-pass boilers and steam power plants.