1.Adjust the superheated steam temperature
Adjusting the superheated steam temperature of industrial steam boilers is generally based on spraying water to reduce temperature, as a means of fine adjustment. The desuperheater is arranged in two or more stages to adjust the steam temperature by changing the amount of water spray. In addition, you can change the inclination of the burner, the stop of the upper and lower burners, change the air distribution conditions, etc. to change the flame center position as a coarse adjustment method to achieve the purpose of steam temperature adjustment.
2.Adjust the reheat steam temperature
There are four methods to adjust the reheated steam temperature: smoke recirculation, separation of flue baffle, steam-steam heat exchanger, and change of flame center height. A recirculation fan is used to extract a part of the low-temperature flue gas behind the economizer, and then send it into the furnace from the vicinity of the cold ash bucket to change the heat absorption ratio of the radiant heating surface and the convective heating surface. For a reheater arranged in a convection flue, when the load is reduced, the reheated steam temperature is reduced, which can increase the amount of recirculated flue gas, increase the heat absorbed by the reheater, and keep the reheated steam temperature unchanged.
The tail flue is divided into two parallel flues by a partition wall, and a superheater and a reheater are arranged in the two flues, and a flue baffle is installed behind the parallel flue economizer. The opening of the baffle can be adjusted to change the flow passage. The flue gas flow of the two flues, thereby regulating the reheated steam temperature. A steam-to-steam heat exchanger is a device that uses superheated steam to heat reheated steam to adjust the temperature of the reheated steam. For boilers equipped with wall reheaters and semi-radiative reheaters, the reheat steam temperature can be adjusted by changing the height of the furnace flame center. In addition, the reheater is also equipped with a small amount of water spray as an auxiliary fine-tuning method.
The above is what I have shared for you about the superheated temperature and reheated temperature of industrial steam boilers. I hope it will be useful to everyone.
