Dear teachers, the pitch of the tube banks, the transverse pitch, and the longitudinal pitch of the boiler economizer tubes
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I have a question: how are the pitch, transverse pitch, and longitudinal pitch of the tube banks in a boiler economizer determined? (It’s okay to know just one of them.) Are there specific standard calculation methods? Thank you, teacher. Please give me some guidance. Or if these values are set by each factory itself, then what are the factors that affect the pitch?
Some expert, please save me! ! ! ! ! ! !
Let me refine my question: In a economizer, the horizontal pitch is generally set at S1 = (2~3)d, while the vertical pitch is usually taken as S2 ≥ (1.5~2)d. How are these values determined? rather than a rough range.
This takes into account the flue gas velocity at the economizer.
Personal understanding: A row of tubes perpendicular to the direction of smoke flow is called transverse, while one aligned with the direction of smoke flow is called longitudinal. These are all determined by the designer themselves based on factors such as smoke velocity, smoke properties, temperature, and experience.
The main considerations are flue gas velocity and soot accumulation, with flue gas velocity being inversely proportional to soot accumulation.