&How to adjust the pH value of the synthesis vapor drum in a synthesis tower?
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There is a leak in our company’s synthesis tower; the pH of the wastewater discharged from the drum is around 6 only. Adding trisodium phosphate does not help to adjust this value. What could be the cause of this, and what are some effective solutions?
You can simply add a small amount of the caustic soda solution used in distillation to the phosphate tank. Safe and efficient.
The pH value of boiler water should not be adjusted primarily by adding trisodium phosphate; instead, ammonia should be added at the outlet of the deaerator to control it. If there is a leak in the synthesis tower, the operation must be stopped for repairs immediately, as this represents a serious safety hazard and the plant cannot continue operating in such conditions
O(∩_∩)O Thank you, floor 3 – it’s not easy to park and carry out maintenance! What to do with synthetic graph catalysts?
If there is a leak in the synthesis tower, the plant must be shut down for maintenance to prevent more serious accidents. It is recommended to gradually reduce the pressure and temperature of the drum to normal room conditions, while also reducing the load. It is necessary to ensure that the pressure in the gas circuit is higher than that in the drum; the gas circuit should then be filled with nitrogen. After that, the catalyst should be passivated. Once passivation is complete, the water inside the synthesis tower should be drained for maintenance purposes.
It’s all a bit exaggerated; they keep operating even after a leak has occurred. The high acidity is mainly due to the dissolution of acidic gases
If the synthesis tower leaks, the catalyst should be passivated before shutting down the plant for maintenance, as there is a significant safety risk. The increase in acidity may also be related to the leakage of acidic gases.
Adding trisodium phosphate cannot achieve regulation; immediate repairs to stop the leak are necessary, with adjustments to be made at the deaerator outlet
Should production prioritize safety, or should maintenance be carried out?
Use the low-phosphate and low-sodium hydroxide method to ensure that the concentrations of phosphate and sodium hydroxide in the furnace water are below 1 ml/m3; if this is not possible, the concentrations can be increased slightly.
It is caused by the dissolution of carbon dioxide and the organic acids produced; it’s best to stop the machine for maintenance, as leaks make it very difficult to control the pressure and temperature in the steam drum! The catalyst won’t last very long either! Moreover, this is a huge security risk!