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Blast tube deterioration and CO

Andrew Rudin
Andrew Rudin Member Posts: 29
in Carbon Monoxide Awareness
I thought that, normally, carbon monoxide is generated by lack of combustion air or flaky fire-side heat exchange surfaces. After correcting both in a Weil McLain model 578 low pressure steam boiler, CO remained over 2,000 PPM. So I pulled the burner to find that part of the end of the blast tube had been burned away. What would have caused this? Could the condition of the end of the blast tube cause high CO?

Comments

  • Tinman
    Tinman Member Posts: 2,808
    Was the boiler over-firing? Gas pressure?
    Steve Minnich
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,858
    Hot flame impingement on cold (relatively so) metal surfaces will also generate significant amounts of CO. Along with excess fuel, inadequate air, condensate fouling a burner and much much more.

    ME

    There was an error rendering this rich post.

    SWEI
  • tim smith
    tim smith Member Posts: 2,807
    Yes, the end of the blast tube being burned off could cause flame impingement and CO. The blast tube may have been too far in the combustion chamber. Usually should be flush to a little recessed from the combustion chamber. Combustion being off originally could cause the blast to overheat and corrode away. Just few notes, good luck.

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