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Moisture Control Solutions for Power Plants Industry | Bry-Air

Power Plants

Moisture Control in Power Plants

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Most power plants generate electricity through burning fossils fuels such as coal, oil and natural gas. High moisture content can affect the overall productivity of the power plant.

Effects of Uncontrolled humidity

In the Power Industry, expensive equipment like turbines, power generators, boilers, condensers etc. begin to rust and corrode while in storage or during plant shutdown or even when in operation due to moisture present in the air. Moisture accelerates the rate of corrosion leading to:

  • Deterioration of parts and components
  • Malfunctioning
  • Decrease in life of turbines etc.

Causes of Uncontrolled humidity

Rate of corrosion accelerates, when Relative Humidity crosses the critical level of 40%. Above this level, industrial pollutants like Sulphur-Di-Oxide, also, enhance the corrosion rate as the Corrosion is faster when surfaces are exposed to polluted air in combination with high relative humidity.

General Recommendations

Relative Humidity during power plant standby should be maintained at 15%-30% RH at 24°C and during operation at less than 35% RH at ambient temperature to minimize the loss due to high humidity.

if the relative humidity of the area where expensive equipment is stored can be restricted to below 40% then all equipment like generator, turbines and their components can be maintained in well-preserved condition for immediate activation, whenever required.

Bry-Air Solutions

Dehumidification involves drying the air by actually removing moisture from it. Removal of moisture from the Storage area lowers the relative humidity of the area effectively arresting corrosion and microbial growth. During turbine storage proper dehumidification, ensures minimum deterioration of all internal systems.

Idle Power plants can be effectively protected from corrosion, by blowing dehumidified air through the steam side as well the generator winding. Dehumidified air keeps non-nuclear components as boilers, condensers, turbines, rust free when the nuclear plant is shut down for refueling-a process that can take up to a whole year. In case of fossil fuel power station, layup can be due to furnace or boiler repair or less expensive power becoming available from alternate source. During such periods – a flow of dehumidified air in the facility prevents rusting and other harmful moisture related problem.

Desiccant Dehumidifiers provide the ideal low humidity environment for preservation and deactivation of Power Plants, since they are capable of maintaining RH as low as 1% or even lower at a constant level, regardless of ambient conditions.

Dry Sorbent Injection (DSI)

DSI Flow DiagramDry Sorbent Injection (DSI) is a rapidly growing technology which refers to the practice of injecting a dry alkaline material into a flue gas stream to reduce acid gas emissions.

The low capital-cost solution helps

  • Reduce inlet sulphur to the FGD
  • Reduce water usage significantly

thereby enabling compliance with the new day environmental control norms.

Along with desiccant dehumidification, which ideally is a prerequisite, it will ensure uninterrupted operations of your Power Plants.

To enhance the absorbtion efficiency of your power plants

  • Avoid lumping and clogging
  • Speeding the conveying and injection process

you should install Bry-Air Dehumidifiers.

Dry/ Dehumidified air during conveying and injecting helps improved efficiency of DSI systems. It ensures the highly hygroscopic sodium sesquicarbonate (or Trona) and sodium bicarbonate does not clog and form lumps halting the process, and leading to interruptions and losses. Bry-Air dehumidifiers help eliminate the high operational costs and meet the emission and compliance norms of the various bodies/ countries.

Partial Reference List

  • Baroda Rayon Corporation Ltd., India
  • Bharat Heavy Electrical Ltd., India
  • Duke Power, USA
  • Duquense Light, USA
  • Gulf State Utilities, USA
  • Jacksonville Electric Authority USA
  • Long Island Light Co. USA
  • Louisiana Power & Light, USA
  • Metropolitan Edison, USA
  • NHPC, HP, India
  • NTPC, Badarpur, India
  • NTPC, Tamilnadu, India
  • NTPC, Dadri, India
  • NTPC, Tanda, India
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