Steam heat exchanger

The utility model relates to the field of steam heat exchange. A steam heat exchanger comprises a heat exchanger body, a liquid level sensor and a drain valve. The heat exchanger body comprises an air inlet cavity, a heat dissipation pipe and a liquid storage cavity, the air inlet cavity is located on the upper portion, the liquid storage cavity is located on the lower portion, and the heat dissipation pipe is vertically arranged and communicates with the air inlet cavity and the liquid storage cavity; condensed water generated by the steam is converged into the liquid storage cavity under the action of gravity, so that the generation of a water hammer is reduced; the water level of the condensate water gradually rises to immerse the bottom of the radiating pipe, so that the upper part of the radiating pipe is used for steam heat exchange, and the bottom is used for recooling the condensate water; by means of the design, the structure of the heat exchanger body is simplified, and a condensate water cooling de