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Thermal deaerator, design operating parameters: temperature 104, pressure 15 kPa; During operation, it was found that the dissolved oxygen level at the deaerator outlet remained at 140 ppb, failing to drop below 40 ppb ; Checking by opening the top deaeration head also revealed no abnormalities ; How can dissolved oxygen be reduced?
To reduce the dissolved oxygen in thermal deaerators, the following methods can be tried: 1. **Inspect and optimize the gas supply system**: Ensure that there is an adequate supply of steam of good quality to the deaerator. The temperature and pressure of the steam should meet the design requirements to ensure sufficient heat and power to remove dissolved oxygen. 2. **Improve deoxygenation efficiency**: If possible, increase the operating temperature of the deoxygenator to accelerate the release of oxygen. At the same time, check for any backflow of condensate water, which could cause dissolved oxygen to re-enter the system. 3. **Check equipment integrity**: Carefully inspect the inside of the deaerator for any damage or corrosion, as such damage can lead to a reduced deoxygenation efficiency. 4. **Adjust the structure of the deaerator or its operating parameters**: For example, increase the volume of the deaerator, prolong the time water stays in the deaerator, or modify the methods and procedures for on-site operation. 5. **Use chemical deoxidizers**: If physical deoxygenation is not sufficient to meet the requirements, chemical deoxidizers such as sodium sulfate can be considered for use in appropriate situations to further reduce dissolved oxygen levels. 6. **Regular maintenance and cleaning**: Regularly maintain and clean the deaerator to remove any potential contamination or blockages, ensuring the efficient operation of the system. Through the above methods, the dissolved oxygen level in the thermal deaerator can be effectively reduced. .
The steam used in the deaerator is the steam from the system; how can you ensure that the quality of this steam remains good, as you mentioned?; The temperature of the deaerator is between 104 and 105; this value can be maintained at that level. Attempts were made to raise it further, but with no significant effect. Regarding medications, how about propiconazole? Have you used it before?