Treatment of air leakage in concrete flue ducts for boiler exhaust gases
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I would like to ask: there is a section of the flue in my factory’s boiler system before the desulfurization unit, and this section is made of concrete. The construction quality of this section might be subpar; during winter, smoke leaks out from the gaps in the concrete. This phenomenon also occurs in summer, but it’s not visible. Due to the low temperatures in winter, condensation water forms on the outer walls of the flue and freezes there, which is both unsafe and unsightly. I was wondering if there are any good methods for sealing leaks, or how is the anti-corrosion treatment for the inner walls of concrete flues in similar types of enterprises designed?
Use refractory bricks for the lining and insulating bricks as well; add more if the diameter requires it. Some devices have a layer of casting material added directly.
Is smoke coming out from the drawing hole in an abnormal manner? Is the smoke escaping outward? What is a drawing hole?
The external wrapping method is better; use glass fiber cloth for wrapping
Smoke is coming out. The threading hole is used to secure the formwork when setting it up.
It turns out that the flue gas at the boiler outlet goes directly into the chimney; due to the negative pressure, no smoke escapes outward； After the flue gas desulfurization was improved, the pressure increased, resulting in a positive pressure in this section of the flue; as a result, smoke began to appear (which is also not allowed from an environmental protection perspective).