Reasons for the continuous decrease in deaerator temperature

Recently, the temperature has risen as well, but the oxygen removal temperature in our plant continues to drop, while the steam pressure remains relatively stable. I’m not sure what the reason is Everyone, please help – the temperature of the deaerator decreases due to factors related to the flow rate and temperature of the make-up water. Even though the steam pressure remains relatively constant, an increase in the make-up water flow rate or a decrease in its temperature can both lead to a drop in the deaerator’s temperature. During operation, the deaerator should maintain appropriate pressure and temperature inside it. However, changes in the unit load, inlet water temperature, and water level in the tank can all affect the stability of the deaerator’s operation, thereby impacting the deoxygenation efficiency. Therefore, ensuring the stable operating conditions of the deaerator is an important factor in achieving good deoxygenation results. 1. It should be equipped with automatic steam and water level control valves to achieve automated steam regulation ； 2. Automatic water inlet adjustment and water level monitoring ； 3. When multiple deaerators operate in parallel, there should be regulating devices for parallel operation. Improve the operation method of make-up water: Make-up water has a low temperature and high dissolved oxygen content; even slight changes in its flow rate can cause fluctuations in the deoxygenation process, thereby affecting the efficiency of deoxygenation. Therefore, it is necessary to raise the temperature of the make-up water. Many power plants have done considerable work in this regard by installing surface heaters to heat the make-up water ； Some power plants introduce make-up water into the condenser for pre-deoxidation; this reduces the oxygen content in the make-up water. It also allows the low-temperature make-up water to enter the various extraction heaters along with the condensate, thereby increasing its temperature and reducing the load on the deoxidizer in terms of heat and mass transfer. At the same time, this improves the economic efficiency of the entire power plant. Additionally, it is necessary to maintain a continuous supply of water to the deaerator, as intermittent water supply can cause fluctuations in the operating conditions of the deaerator. This post was last edited by eddy-8280103 on 2009-3-20 15:22]

The description on the 2nd floor is very detailed. Additionally, since thermal power plants use steam extraction heaters in their deaerators, the amount of steam extracted also needs to be taken into consideration

Our condensate is recycled to the deaerator, which not only helps save steam but also allows the feedwater in the deaerator to be heated to 140 degrees. In addition, a reboiling valve is also provided; it can be activated when the oxygen content is high and the temperature of the deoxygenated water is low, thereby using steam to heat the deoxygenated water in the tank and achieving the purpose of raising its temperature and removing oxygen from it