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How to Retrofit a Steam Turbine

Many production facilities use a combination of coal fuel and steam turbines to power electrical generators. The generator supplies energy to the manufacturing facility for operating conveyor belts and heavy production machinery. However, steam turbines require retrofits, or overhauls, periodically for the best power output to the generator.

Things You'll Need

  • Rotors
  • Turbine blades
  • Inner casings
  • Multihole bypass valves
  • Brush seals
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Instructions

    • 1

      Replace old bypass valves with multihole bypass valves. The valves control the steam's movement through the turbine. Eventually, the valves become damaged from scaling and erosion. Multihole bypass valves allow more steam flow through the assembly by accessing more inlet openings. Older bypass valves tend to form bottlenecks for steam movement, causing more damage over time.

    • 2

      Replace the turbine blade assembly with a modern blade fabrication using more compact turns. Turbines use blades that resemble parallel discs spinning in unison. Retrofitting a steam turbine with more blades prevents excessive steam leaks that hinder overall efficiency. In addition, older blades can disintegrate over time, possibly causing broken parts to infiltrate and damage the turbine̵7;s interior.

    • 3

      Replace the turbine̵7;s rotor and inner casings. The rotor and inner casings allow the turbine to rotate in a constantly smooth motion. Ultimately, the two assemblies begin to break down from erosion. As a result, friction occurs between the rotor and casing. The friction slows the turbine and efficiency suffers.

    • 4

      Install new brush seals. The brush seals isolate the rotor assembly from any outside contaminants. The seals deteriorate with continued use, allowing contaminants to infiltrate the rotor̵7;s interior. New brush seals ensure a secure rotor assembly.


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