Change language
|
ROCHEM Fyrewash Ltd
5-6 Sun Valley Business Park
Winnall Close, Winchester
Hampshire
SO23 0LB
ROCHEM Fyrewash Inc
23707 West Hardy Road
Spring
Texas
77373
11.10.21
Whether your site is in the driest desert or miles offshore, you will face the issue of contaminants within your
Once there, these foulants can impact productivity, damage components and even cause costly unscheduled shutdowns if you don’t address them in good time. But where do contaminants come from and what can you do about them?
Unfortunately, whatever kind of fuel you use, it is unlikely to be a totally pure product. Natural gas for example consists mostly of methane but also has small amounts of nitrogen, CO2, ethane, propane, and hydrogen sulphide.
The latter is of most concern when it comes to compressor blade corrosion and, if water contaminates the fuel, you may also note the presence of alkali metals.
The contaminants in liquid fuels depend on the type you choose. You may have residues from the fuel’s crude origin; or contaminants introduced by poor handling during processing; or during transport.
No matter how good your air filter is, you’re likely to face the issue of airborne contaminants entering your As you’d expect, the type of contaminants vary site-to-site and even day-to-day but you could note:
Sea salt alone introduces chloride, sodium, sulphates, magnesium, calcium, and potassium to your compressor.
The physical particles of salt can cause erosion but you also have the issue of corrosion if the salt is mixed with water.
Untreated water can introduce a range of contaminants including sodium and potassium which will corrode the delicate inner workings of your turbine compressor.
Contaminants cause three main issues in a gas turbine compressor:
Some contaminants will fuse to compressor blades, interrupting the aerodynamics and thus reducing efficiency.
Contaminants can physically erode the surfaces with which they collide, especially under the extremely high pressures found inside gas turbine compressors.
Some contaminants will chemically react and corrode compressor components. Many of the contaminants mentioned can cause corrosion and the extremely hot temperatures of the compressor accelerate the problem.
‘Hot corrosion’ is accelerated oxidation when molten salts react with the compressor components. The higher the levels of contaminants including chlorine, fluorine, potassium, sodium, sulphur, vanadium and lead, the worse the corrosion.
Some contaminants e.g. sulphur can dissolve in water to become acidic, further corroding your compressor.
The goal for every gas turbine is to be as productive and profitable as possible. When contaminants threaten these goals, it is essential to tackle them: regain lost power and boost efficiency. This is precisely our area of expertise.
Alongside minimising the introduction of contaminants by using an air filter, purifying any water used and ensuring careful fuel handling, you can remove inevitable contamination from the .
Our range of compressor equipment and chemicals is the chosen technology for sites around the world.
Special nozzles inject atomised cleaning solution into the turbine compressor during normal operation, effectively cleansing away contaminants without impacting on turbine performance.
Complement these on-line cleans with less regular off-line washing to keep your turbine running at peak performance.
Our range of are specially designed to combat a wide range of contaminants found in gas turbine compressors. There is a product for every situation: from environmentally sensitive offshore locations to sites operating in high levels of pollution.
In order to run the most efficient, profitable, and reliable gas turbine possible, it’s essential to remove contaminants.
If you’d like to find out more about how Rochem can help at your site, . Our knowledgeable team will be happy to talk about your specific requirements.
Post written by Martin Howarth
An extensive knowledge of mechanical and electrical engineering together with hands on experience with gas turbines provides a bedrock for his work at Rochem.
