The status quo of CFB boiler+tail section flue gas desulphurization technology at abroad

as well as the principle of selecting tail section desulphurization mode

have been presented.Through analysis and comparison of several main desulphurization modes

such as wet limestone/gypsum method

flue gas CFB dry method

rotary spray semi-dry method

calcium-spraying into furnace-tail section humidifying activation method

and single calcium-spraying into furnace method etc.

it is believed that the first-stage desulphurization in the furnace of CFB boiler + secondary-stage desulphurization in the tail section with humidifying activation is the reasonable mode for deep desulphurization of large-capacity CFB boiler

this mode of desulphurization has high efficiency

low cost

and good environmental benefit

being simple and easy to realize.