Abrogating the gas by-pass can simplify the flue gas desulfurization system and reduce the fault points and investment.Factors affecting the reliability of the system without bypass

including desulfurization equipment fault and flue gas system fault

were investigated.Corresponding solutions were put forward according to several items such as equipment material selection

process design

logic control and operation management etc.For example

enlarging equipment spare coefficient like using anticorrosion rubber lining for absorption tower and alloy for oxidation pipeline

uniting the induced draft fan and desulfurization booster fan

appropriately lengthening the inlet flue duct of absorption tower and installing accident spraying system in the duct

optimizing the system logic

operating the boiler with no oil supporting and other measurements are proposed.