Device for flue gas circulating fluidized bed unites demercuration dearsenification

The utility model provides a device for flue gas circulating fluidized bed unites demercuration dearsenification, includes the economizer that connects gradually through flue gas pipeline, selective catalytic reduction denitrification facility, and air heater, fluidized bed reactor, bag collector, desulfurizing tower and chimney, be provided with two way pipelines of reposition of redundant personnel flue gas pipeline and main flue gas pipeline between said economizer and the fluidized bed reactor side by side, main flue gas pipeline communicates to fluidized bed reactor's bottom port, reposition of redundant personnel flue gas pipeline goes up and to have set gradually hydrogen bromide solution from the economizer to fluidized bed reactor and add branch road and adsorbent interpolation branch road, and reposition of redundant personnel flue gas pipeline's end is through the lower part intercommunication of flue gas nozzle with fluidized bed reactor, and the flue gas nozzle lies in the top of port bottom the fluidized bed reactor, bag collector's below is provided with the mechanism is retrieved to the adsorbent. The utility model discloses do not produce secondary pollution, the desorption of mercury and arsenic is efficient, can effectively prevent the mercury and the pollution of arsenic to the atmospheric environment that produce in the coal-fired flue gas