The issue of selecting a deaerator for steam boilers
Thread Content
I would like to ask everyone: I currently have a 20-ton steam boiler that uses a thermal deaerator. What size should the deaerator be? Are there any principles or guidelines for making this choice? What is the approximate amount of steam consumed?
The capacity of the deaeration head is determined based on the boiler’s feedwater volume corresponding to the rated evaporation rate, while the capacity of the deaeration tank is calculated based on the feedwater volume at 20 minutes of rated evaporation. The steam is calculated based on heat balance and mass balance.
20t/h deaerator, 10 cubic meter water tank
What size deaerator is required for a 80t/h boiler?
The boiler should be sized at 1.25 times the evaporation rate; the effective capacity of the water tank must be sufficient to cover 15 minutes of rated evaporation. The empirical value for gas consumption is 10% of the water intake volume
The effective volume of a 100t tank is 25~30 m3
A low-pressure rotary film deaerator is selected; it is equipped with a water tank having an effective capacity of 8–10 25t/h, requires around 2 tons of gas per unit time, operates at an outlet water temperature of 104°C, and the cost of such equipment is approximately 50,000–70,000 yuan