I doubt whether the water pH can be achieved at 9.2–9.6 with such a design!
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The desalination system uses tap water as the water source, and it incorporates self-cleaning filters, ultrafiltration, primary reverse osmosis, secondary reverse osmosis, and EDI. Ammonia is added at the outlet of the desalination water pump. The designed boiler make-up water volume is 7 T/H; three 50 T boilers are used for burning sludge rather than for generating heat. Adding ammonia at the outlet of the desalination water pump to adjust the pH can only achieve a level of around 9.2; once the water enters the thermal deaeration system, will the ammonia, as a dissolved gas, also be removed simultaneously? ? ? Can the pH of the feedwater at the deaerator outlet reach 9.2–9.6? ? Please help take a look, thank you!
Generally, chemical dosing is done in the inlet pipeline of the feed water pump, right? After heating in the deaerator, a portion is indeed removed.
Chemical dosing is at the inlet of the feed water pump; it’s a small furnace
Our ammonia addition point is located at an opening in the pipeline between the deaerator drain valve and the boiler feedwater pump