We are reciprocating cycle machines; the packing cooling is achieved using ammonia, and the cooling for the cycle machines is provided by the ammonia chiller unit
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We are reciprocating cycle machines; the cooling of the packing is achieved using ammonia, which is provided by the ammonia chiller unit. The gaseous ammonia then returns to the chiller. After the system is shut down, how do you coordinate the use of ammonia for the cycle machines in order to prevent catalyst deactivation?
Due to the slow process of emptying and depressurizing the liquid ammonia tanks, liquid ammonia can be supplied from the ammonia storage tank via the ammonia transfer pipeline during the two days of shutdown for passivation. After evaporating, the gaseous ammonia flows through the main gas ammonia pipeline back to the ammonia storage tank to be converted into ammonia water, or it can be drained directly from the bottom of the ammonia cooler to also be turned into ammonia water. In this way, the ammonia cooler and the ammonia return pipeline will always maintain a certain pressure, but the chiller system can be depressurized for maintenance.
Provided by the ammonia tank; gaseous ammonia returns to the main ammonia pipeline
Our company’s system is similar to what’s described on the second floor, except that the ammonia is poured in from the middle channel; gaseous ammonia returns to the main gaseous ammonia pipeline. Over time, it’s necessary to start the chiller for a while, wait until the pressure drops, and then stop it again. It won’t take more than a few uses back and forth.
Our factory used to be in the same situation as the original poster; during the period when operations were suspended, running the refrigeration units consumed a lot of energy, which was not cost-effective. It was later changed to soft water cooling, and our 3 sets of 4.5-cubic-meter reciprocating machines have been working very well ever since; you might want to give it a try.
I agree with what was said above; it’s the same in our factory as well. We use two cooling methods. If ammonia isn’t convenient to use, it can be mixed with water and still yield good results.
Provided by the ammonia tank, gaseous ammonia returns to the main ammonia return pipeline; it is converted into ammonia water at the absorption unit, or compressed into liquid ammonia using an ice maker before returning to the ammonia tank.