Filtered tail gas washing tower

The invention relates to the field of liquid ammonia production, in particular to a filtered tail gas washing tower. The tower comprises a tower body, a gas inlet is formed in the bottom of the towerbody, a gas outlet is formed in the top end of the tower body, and a liquid inlet and a liquid outlet close to the bottom of the tower body are formed in the side wall of the tower body. A plurality of tower trays located below the liquid inlet are arranged in the tower body in the height direction of the tower body, a gas-liquid separation device close to the gas outlet is arranged in the tower body, and the gas-liquid separation device is located above the tower trays. The gas entering the tower body is filtered by utilizing the multiple layers of tower trays, and the gas and atomized liquidare separated by the gas-liquid separation device, so that the liquid can be recycled to the tower trays to be filtered again, the overall filtering efficiency of the washing tower is better improved, the purity of produced h