Abrasion leakages have frequently occurred on tubes of the heat recovery surface in tail section of boilers in one power plant.It is believed from analysis that the main cause is due to unreasonable arrangement of tube rows on the heat recovery surface in tail section of boilers

making the flue gas to increase flow velocity and change direction to scour the low-temperature reheater and low-temperature superheater.For this

some measures have been put forward as in the following:1) installing wear-resisting casings on nine tubes in 1~3 pipe rows at the left and right side of the low-temperature superheater;2) laying coatings of refractory cement on 1~6 pipe rows at left and right side of the low-temperature superheater

as well as on inlet header and outlet header of the steam cooled wall.