Several factors affecting desulphurization efficiency inside the furnace of CFB boilers by mixedly burning petroleum coke

including tube-clogging in lime-stone conveying system

stop of rotary material-feeding valve due to jam

fault of material-dropping from pressure vessel conveyer

as well as bed temperature

Ca/S molar ratio

coefficient of excess air

and recycling quantity of fly ash etc.

have been analysed

and corresponding disposal measures being put forward.At the same time

the parameter control range of bed temperature

Ca/S ratio

and coefficient of excess air etc.under condition of optimal desulphurization efficiency in this type of boielrs has been given

providing certain reference for design and operation of similar boielrs and desulphurization system.