air preheater problems
air preheater problems
(OP)
Dear All
My boiler is gas fired boiler. Natural gas is fuel. It contains no sulphur. Is it advisable to use carbon steel heating elements in cold end portion as there is no sulphur so there is no risk of Acid dew point corrosion. Please guide me
Regards
Pradeep
My boiler is gas fired boiler. Natural gas is fuel. It contains no sulphur. Is it advisable to use carbon steel heating elements in cold end portion as there is no sulphur so there is no risk of Acid dew point corrosion. Please guide me
Regards
Pradeep





RE: air preheater problems
Regards
RE: air preheater problems
Regards
Pradeep
RE: air preheater problems
RE: air preheater problems
RE: air preheater problems
Typically low grade stainless alloys are used. Where it is hot enough that there is no risk of condensation they use CS, then move to 409 as it cools, and then in cold areas where they will frequently be wet they may move to 439.
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P.E. Metallurgy, Plymouth Tube
RE: air preheater problems
Thanks for your very very valuable answers. I have one more doubt if you all can answer then I will be very grateful
In our air preheater, design circumference strips clearance was 3mm but now clearance increased to 30mm. I want to know that apart from heat loss( Hot flue gas will bypass heating elements and go through increased clearance thereby not giving heat to heating elements)which other parameters will be disturbed like draft and Id fan load etc.
Regards
Pradeep
RE: air preheater problems
I have not got ny reply did I asked wrong question?
regards
pradeep
RE: air preheater problems
Sketch the problem, to scale, and label the change you described.