The invention relates to desulfurization and
denitrification equipment. The desulfurization and
denitrification equipment comprises an ash removal device, an
oxygen regulation device, an absorption
tower and an absorption
liquid circulation tank, wherein the ash removal device, the
oxygen regulation device and the absorption
tower are sequentially communicated through a
flue gas pipeline, the front end of the ash removal device is connected with a
flue gas inlet, a flow regulating valve is arranged between the
flue gas inlet and the ash removal device, a first
temperature control device is arranged between the ash removal device and the
oxygen regulation device, a second
temperature control device is arranged between the
oxygen regulation device and the absorption
tower, an induced draft fan is arranged between the second
temperature control device and the absorption tower, a first valve is arranged between the first temperature control device and the ash removal device, and the absorption
liquid circulation tank is connected with the absorption tower; granular substances in the
flue gas can be sufficiently separated, the moving path of the
flue gas in the absorption tower is prolonged, the reaction time is prolonged, and the
flue gas is subjected to sufficient desulfurization and
denitrification reaction, so that the flue gas reaches the
emission standard.