Calcination tail gas dilute wastewater circulating spraying system

The utility model relates to a circulating spraying system for dilute waste water of calcination tail gas, which is characterized in that a water outlet pipe A of a dilute waste water tank (1) is connected with a feed port of a primary closed cooling tower (3) through a water pump (2), a discharge port of the primary closed cooling tower (3) is connected with a feed port of a secondary closed cooling tower (4) through a water inlet pipe B, and a water outlet pipe C of the secondary closed cooling tower (4) is connected with a cold water barrel (5). A water outlet pipe D of the cold water barrel (5) is connected into the spraying water tank (7) through a cold water pump (6), a water outlet pipe E at the bottom of the spraying water tank (7) is connected with a nozzle of the venturi (9) through a spraying pump (8), and a calcination tail gas flue G is connected into the venturi (9) from a gas inlet in the top of the venturi (9). The dilute waste water is recycled, a large amount of sensible heat carried in the