Flue gas dry-type deacidification and dust removal device

The invention discloses a flue gas dry-type deacidification and dust removal device which comprises an inner cylinder, an outer cylinder and an ash collection device, and the inner cylinder is sleevedwith the outer cylinder; the top end of the outer cylinder is connected with the side wall of the inner cylinder; an annular space formed by the inner cylinder and the outer cylinder is communicatedwith a space in the inner cylinder through the bottom end of the inner cylinder and the bottom end of the outer cylinder; the inner cylinder positioned outside the outer cylinder is provided with a gas inlet and a dosing port; the ash collection device is located at the lower end of the outer cylinder, and a closed space is formed by the ash collection device and the outer cylinder; an air outletof the outer cylinder is formed above the bottom end of the inner cylinder; a dust removal filter bag is arranged in the annular space, and gas entering from the gas inlet passes through the dust removal filter bag and then is