Calculation of steam consumption in atmospheric thermal deaerators
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How is the steam consumption of an atmospheric thermal deaerator calculated?
The steam consumption of the thermal deaerator is calculated using the following formula: Qs = K * (T1-T2)/103KPa. Where: Qs represents the steam consumption, K represents the absorption efficiency, T1 represents the temperature of the gas feed, T2 represents the temperature of the steam output, and 103KPa represents atmospheric pressure； Therefore, to calculate the steam consumption of a gas-heat deaerator, it is necessary to know the gas feed temperature, the steam outlet temperature, and the absorption efficiency; the steam consumption can then be determined using the formula mentioned above. -
Thank you. Where does this formula come from? What values should be chosen for those parameters? For example, I am a 10-ton superheated steam boiler. The steam pressure is 1.6 MPa, and the steam temperature is 250 degrees.
The formula for the steam consumption of gas-heat deoxidizers is taken from the book \"Fuel and Thermal Machinery\", where K depends on the type of desulfurization unit, and is usually between 0.7 and 0.8. Based on the parameters you provided, T1 is equal to 250 degrees (the steam temperature you gave), T2 is equal to room temperature, and the atmospheric pressure is approximately 103 kPa. Therefore, the steam consumption Qs = K * (T1*T2/103 KPa) ≈ K * (250*1/103 KPa). If the value of K is around 0.75, then the steam consumption is: Qs = 0.75 * (250*1/103 KPa) ≈ 176.5 kg/h. -
Thank you. Where does this formula come from? What values should be chosen for those parameters? For example, I am a 10-ton superheated steam boiler. The steam pressure is 1.6 MPa, and the steam temperature is 250 degrees.
This formula is taken from \"Thermal Deaeration Technology\" (published by China National Petroleum Corporation). Here, K takes values between 0.9 and 1.1; T1 is the temperature of the gas feed – for a 10-ton superheated steam boiler, T1 can be set at 250°C. T2 represents the outlet temperature of the steam, and this value is generally equal to the exhaust gas temperature. 103 Kpa corresponds to the atmospheric pressure at normal temperature, and this value remains constant. -
The steam consumption of thermal deaerators is shown in the figure below, taken from the third edition of the \"Textbook for the Professional Qualification Examination for Registered Public Equipment Engineers in the Field of Power Engineering\", page 168