For oil and gas boilers, how to adjust the boiler superheated steam temperature and reheat steam temperature, so that the normal operation of the boiler?Zhengzhou Fang fast boiler factory summed up the following factors, for your reference.
1, adjust the overheating steam temperature
Adjust the overheated steam temperature of the boiler is generally based on water spray temperature reduction, as a fine adjustment means.The desuperheater is arranged in two or more stages to adjust the steam temperature by changing the amount of water spraying.In addition, it can change the inclination Angle of the burner, the throwing stop of the upper and lower nozzle, and change the air distribution condition to change the center position of the flame as a rough adjustment means to achieve the purpose of steam temperature regulation.
2, adjust the reheat steam temperature
There are four methods to adjust the reheat steam temperature: flue gas recirculation, separation flue baffle, steam and steam heat exchanger and change the height of the center of the flame.Using the recirculation fan, the low temperature flue gas after economizer is pumped out, and then sent into the furnace from the vicinity of the ash hopper, so as to change the heat absorption ratio of radiation heating surface and convection heating surface.For the reheater arranged in the convection flue, when the load is reduced, the reheat steam temperature decreases, and the amount of recirculated gas can be increased to increase the heat absorption of the reheater and keep the reheat steam temperature unchanged.
Divide the tail flue into two parallel flue with the partition wall, and arrange superheater and reheater respectively in the two flue, and the flue baffle is installed behind the parallel flue economizer. The flue gas flow through the two flue can be changed by adjusting the opening of the baffle, so as to adjust the reheat steam temperature.Steam FAW heat exchanger is the use of superheated steam heating reheat steam to adjust the reheat steam temperature equipment.For boilers with wall reheaters and semi-radiant reheaters, the reheat steam temperature can be adjusted by changing the height of the flame center in the furnace.In addition, the reheater is also equipped with micro water spray as an auxiliary fine-tuning means.