LI Xing-hua1, KUANG Wei1, JIANG Jian-zhong2, et al. CAUSE AND COUNTERMEASURES FOR HIGHER AIR-LEAKAGE RATE OF THE ROTARY AIR PREHEATER USED FOR CFB BOILER OF 300 MW UNIT[J]. Thermal power generation, 2008, (3): 45-48.
LI Xing-hua1, KUANG Wei1, JIANG Jian-zhong2, et al. CAUSE AND COUNTERMEASURES FOR HIGHER AIR-LEAKAGE RATE OF THE ROTARY AIR PREHEATER USED FOR CFB BOILER OF 300 MW UNIT[J]. Thermal power generation, 2008, (3): 45-48. DOI: 10.19666/j.rlfd.2008.03.012.
The problem of air-leakage was existing in the rotary air preheater of circulating fluidized bed (CFB) boiler used for a 300 MW unit. It is believed from analysis that the main causes resulting in air leakage are as follows: severe wornout of radial and axial sealing strips
damage of large amount in by-pass sealing strips
large roundness error of T-shaped steel at top and bottom of the rotor etc. For these
measures
such as controlling the pressure difference at the air side and the fue gas side
and controlling the clearance of radial
axial
and by-pass sealings
etc
have been put forward. After implementation
the air leakage rate of said air preheater has decreased about 3.3%.