Dangerous waste boiler superheater tube box with built-in heat preservation function

The utility model relates to the technical field of superheaters, in particular to a hazardous waste boiler superheater tube box with a built-in heat preservation function, which comprises a box body, a snakelike pipe piece, an upper header and a lower header, the upper header and the lower header are sequentially arranged along the vertical direction, one end of the upper header and one end of the lower header are transversely inserted into the box body, and the other end of the upper header and one end of the lower header are transversely inserted into the snakelike pipe piece. The other end of the lower collecting box partially extends out of the box body and is communicated with a vertical downward drain pipe; the snakelike pipe pieces are arranged in the box body and located between the upper collecting box and the lower collecting box, one ends of the snakelike pipe pieces are communicated with the upper collecting box, the other ends of the snakelike pipe pieces are communicated with the lower collecti