Corrosion and leakage have occurred in the cold-end tube bundle of the air preheater. What is the number of tubes that need to be plugged?
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Our company’s tubular air preheater has corrosion and leakage in the cold-end tube bank; what is the maximum allowable number of sections that can be plugged? Thank you!
The number of blocked items cannot exceed 10% of the total. .
It depends on the level of energy consumption you can tolerate; generally, the maximum percentage of blocked units per machine should not exceed 30%.
Generally, a design margin of 10% is adopted; the specific value depends on your manufacturing process and system load
First, thank you for your help. Is there a theoretical basis for 30%?
The empirical values for company equipment management were passed down by experienced workers in the past.
All that’s needed is to redo the thermal calculations; if reducing production capacity is acceptable, or if the upstream and downstream processes can compensate for the heat load, then it’s feasible to block 50% of it as well
There are no clear regulations for this; it mainly depends on the overall usage status of the system – if it can no longer meet the requirements, then it needs to be replaced
It can be blocked until it can no longer be used; so-called 10% or 30% are just theoretical figures