fire tube boiler Agent failure

Failure Investigation of a Fire Tube Boiler Introduction

A fire tube boiler generating steam for a fruit processing plant failed Figure 1 shows a typical fire tube boiler layout Coal is conveyed and combusted in the furnace while heat is extracted via forced air convection The heated air is carried in three passes through the boiler shell heating the water surrounding the firetubes

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Finding the Root Cause of Boiler Tube Failures

Failures result when the A typical example is when superheater tubes have not cleared of condensation during boiler start-up obstructing steam flow Tube metal temperatures reach combustion gas temperatures of 1600F (870C) or greater which lead to tube failure

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An overview of problems and solutions for components

· One of the most important causes of boiler tube failure that is can be prevented by following the given measures: avoid stress concentrations pay careful attention to the details at design stage to make sure that cyclic stresses are sufficiently low to attain the required endurance use stronger and more capable materials with high fracture toughness and slow crack

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Understanding Refractory FailureA New Perspective

Insufficient material installed on the lower furnace walls inside a fluidized bed boiler could to excessive stud and tube wall failure Excessive material installed on the lower furnace walls inside a fluidized bed boiler in conjunction with not following proper curing and/or drying procedures could contribute to a complete refractory material failure

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What is Pitting Corrosion in Boiler? - Boiler Water Treatment

· tube sheets especially weld seams There are 7 different types of pitting corrosion In conclusion Oxygen pitting involves highly localized metal loss and potential for rapid equipment It is also major cause of in low pressure boiler systems

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