Flue gas purification and waste heat recovery circulating system for bell-type annealing furnace

The utility model discloses a flue gas purification and waste heat recovery circulating system for a bell-type annealing furnace, which comprises a flue gas fire-retardant shell, a spray fire-extinguishing circulating component is arranged in the flue gas fire-retardant shell, a heat exchange circulating component is arranged on one side of the spray fire-extinguishing circulating component, and a flue gas purification component is arranged at the top of the flue gas fire-retardant shell. Furthermore, in order to achieve the purpose of spraying fire extinguishing circulation, the spraying fire extinguishing circulation assembly comprises a spraying head, the spraying head is installed on the inner wall of the smoke fire-retardant shell in a surrounding mode, and one side of the spraying head is connected with a spraying pipe. According to the waste heat utilization heat exchanger of the horizontal annealing furnace, smoke in the annealing furnace is adsorbed and treated, and the waste heat utilization heat ex