Flue gas desulfurization absorption tower

The utility model discloses a flue gas desulfurization absorption tower, which belongs to the technical field of environmental protection equipment and comprises a tower body, a gas inlet, a water tank opening, a gas outlet, a water tank, a water pump, a water conveying pipe, a filter screen, a fixing component, a first access door, a spraying component, a packing layer and a second access door, an air inlet is formed in the lower end of one side of a tower body, a water tank is installed on one side of the tower body, a water tank opening is formed between the water tank and the tower body for connection, a water pump is arranged in the water tank, a water conveying pipe is connected to the water pump, a filter screen, a spraying assembly and a packing layer are sequentially arranged in the tower body from bottom to top, and a first access door and a second access door are arranged on the outer side of the tower body. The end part of the water conveying pipe is connected with the spraying assembly, the spray