Regarding deaerators
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Deaerators can be classified into thermal deaeration and chemical deaeration. Literally speaking, thermal deaeration involves the use of steam, while chemical deaeration entails the use of chemical agents. However, the deaerators used in our company employ both steam as well as chemical agents; these agents are sodium hydroxide and trisodium phosphate. So, does this fall under thermal deaeration or chemical deaeration? Our operating procedures state that the deaerator temperature should be between 100–104 degrees, the pressure should be 0.02 Mpa, and the water level should be maintained above 50%, with a minimum of 30%
This is for thermal deoxidation; sodium hydroxide and trisodium phosphate are used as chemicals to reduce the hardness of the boiler water.
Thermal deoxidation is used; chemicals are added to reduce water hardness, not for deoxidation. Many deaerators use this design, and their operating parameters are similar; they generally operate at atmospheric pressure.
NaOH and Na2PO3 are used to reduce the hardness of water in boilers, and they are not closely related to deaerators.
Do you use thermal deoxidation, chemical deoxidation, or adsorption deoxidation, which involves burning activated carbon to displace and consume the dissolved oxygen in water thereby achieving deoxidation? The energy consumption for this method is lower than that of thermal deoxidation; no heating to 102 degrees is required, as normal room temperature is sufficient.
The chemical dosing location is in the drum, not inside the deaerator.