START SAVING ON YOUR FUEL COST SPEND

It’s not always easy to reduce operating costs. With today’s low natural gas prices, power generators are pressed to find ways to reduce costs and try to make a profit. Have you crunched the numbers to see your fuel spend due to backpressure issues? Did you know that 1 inwc (2.5 mbar) may cost a US-based operator approximately $50-100K/year? PressureWave Plus® doesn’t just improve backpressure to near-design specifications, it improves full and minimum CC heat rates.

Boiler deposits of iron oxide and ammonium bisulfate on the flue gas side can lead to tube fouling of heat recovery steam generators (HRSG). This reduces the heat transfer efficiency and increases backpressure on an adjoining gas turbine. Additionally, it lowers the turbine efficiency, which can lead to higher operating costs.

But GE offers a solution for effective tube cleaning: PressureWave Plus®, developed by BANG&CLEAN® Technologies AG, that uses pressure waves to penetrate deep into the tube bundle for a more effective and efficient cleaning.

CS16601-01_PressureWavePlus_Graphic_R2b
CS16601-01_PressureWavePlus_Graphic_R2b

PressureWave Plus benefits:

  • Is cost-competitive, applicable to all HRSG types and can be mobilized quickly, with no scaffolding required
  • Cleans deeper into the tube bundle, also in areas which cannot be reached by other technologies
  • Reduces gas turbine backpressure, improves heat transfer, and increases plant performance
  • Doesn’t require water and provides a more effective HRSG cleaning than traditional CO2/dry ice blasting methods
  • Can be completed in half the time compared to other methods, without damage to tubing

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DISCOVER SAVINGS FOR FUEL COST SPEND WITH PRESSUREWAVE PLUS®

Complete cleaning easily while offline. 

Pressure waves penetrate deep within the tubing bundles providing a more effective and efficient cleaning as compared to traditional cleaning methods.

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Image1

No scaffolding needed. 

A special lance is introduced into the area between the pressure part modules. A bag at the end of the lance is then inflated with a combustible mixture which is ignited remotely.

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Image2

No damage to tubing. 

The resulting pressure wave and tube vibrations dislodge the deposits without damaging the tubing. This is repeated in many locations.

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Image3

A fast, deep cleaning. 

Once the tubing is thoroughly cleaned, the debris is removed from the floor of the unit.

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Image4

CALCULATE YOUR ROI

DISCOVER SAVINGS FOR FUEL COST SPEND WITH PRESSUREWAVE PLUS®

When is a 28,000-pound pile of rust a good thing? When it comes from the inside of a heat recovery steam generator (HRSG).

hrsg-flue-gas-side-cleaning-small

Before Cleaning

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After Cleaning

Recently, GE was called into a combined-cycle plant in the southeast US to address gas-side tube fouling on the cold-end modules of the HRSG unit. Tube fouling can considerably lower a plant’s power output and efficiency from the reduced heat transfer efficiency and increased gas turbine back pressure.

And that’s just what was happening. Following an extended outage, the plant was experiencing significant gas turbine back pressure.

case-study-image-2
case-study-image-2

An inspection revealed fouling of heat transfer sections downstream of the selective catalytic reduction (SCR) due to oxidation and accumulation of debris in the modules. Initially, the plant tried an alternative cleaning method to remove the corroded material. This cleaning method removed three tons of debris from one HRSG. The plant went back online and continued to experience back pressure that was higher than expected.

It was then the plant turned to GE’s PressureWave Plus HRSG cleaning technology during a mini-outage in the spring of 2016. GE experts cleaned four modules of one HRSG, removing more than 14 tons of additional debris from the “already cleaned” unit.

Results were immediately noticeable upon restarting the unit. Gas turbine back pressure dropped approximately 8 inches, and the stack temperature decreased 30°F. 

CALCULATE YOUR ROI

DISCOVER SAVINGS FOR FUEL COST SPEND WITH PRESSUREWAVE PLUS®




pressure-wave-case-study-image

Download the case study

The inside of a heat recovery steam
generator (HRSG)

Download case study 

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                            PressureWave Plus® is a trademark of Bang&Clean Technologies AG.