Research on coupling optimization technology for anti blocking and leakage control of boiler air preheater based on centralized heating of hot fluid
WAN Mao
CHEN Baiming
JIANG Qinghu
HE Jinwei
Abstract：Aiming at the problems of blockage,high air leakage rate,and high exhaust temperature rise in the rotary air preheater of a 600 MW supercritical coal-fired unit,a coupling optimization technology scheme for anti blockage and leakage control based on centralized heating of hot fluid is proposed.The scheme achieves comprehensive optimization of the operating parameters of the air preamplifier through the coordinated application of air volume slitting anti-ash clogging technology and flexible contact sealing technology.The results show that after the transformation,the pressure difference on the flue gas side of the air preheater has dropped from 2.2 kPa to below 1.2 kPa,and the air leakage rate has decreased from 8%to 9%to below 4.5%,providing a solution for the comprehensive management of air preheaters in coal-fired units.
Keywords：boiler air preheateranti blocking and leakage controlcoupling optimizationcentralized heating of hot fluidflexible seal
Publication Date：2025-12-25
Online Publishing Date：2026-01-26(First online date of this platform, not the publication date of the document)
Pages：4( 85-88 )