Steam steam heat exchange is a device used to regulate the temperature of reheated steam. It uses superheated steam to heat reheated steam, and adjusts the temperature of reheated steam by changing the number of reheated steam being heated.

There are two types of steam steam heat exchangers: sleeve type and cylinder type. The cylinder type structure of the steam steam heat exchanger is installed outside the boiler flue. Superheated steam moves within the U-shaped tubes inside the cylinder, while reheated steam moves between the tubes inside the cylinder. By using an externally installed three-way regulating valve to change the amount of reheated steam flowing through the heat exchanger, the amount of reheated steam flowing through the heat exchanger is increased, which absorbs more heat from the superheated steam and increases the temperature of the reheated steam. Conversely, the temperature of the reheated steam can be lowered.

Due to the fact that the steam steam exchanger uses superheated steam to heat reheated steam for temperature regulation, it is suitable for large capacity boilers that mainly use radiant superheaters and have overall steam temperature characteristics as their radiation characteristics. Due to the fact that the steam temperature of the superheater in this type of boiler increases as the boiler load decreases, while the reheated steam temperature decreases as the load decreases. In the steam steam heat exchanger, the superheated steam heats the reheated steam with excess heat, so that both the superheated steam temperature and the reheated steam temperature can be controlled within the rated range. However, using this method to regulate the temperature of reheated steam requires an improvement in the resistance of the superheater system and an increase in the steel consumption of the boiler.