Seeking solutions for ammonia leakage in the circulating machine cooling system
Thread Content
Our company uses ammonia cooling for the cooling of the fillers before and after the circulator. Recently, hydrogen and nitrogen gases have repeatedly entered the main ammonia pipeline, resulting in an increase in pressure within the chiller system and hindering its long-term operation. Do any companies that use ammonia cooling for their circulator fillers experience such problems? How was this issue resolved? Also, how can one properly determine which set of packing is leaking when the circulation machine is in operation? I would appreciate guidance from experienced engineers. Thank you
The intrusion of hydrogen and nitrogen into the ammonia system indicates that there is an unintended leakage in the packing. The ammonia used for cooling the packing and the hydrogen and nitrogen gases circulate in their respective systems; sealing is achieved primarily through O-rings located between the packing boxes. These O-rings provide a static seal, and as long as they are replaced at regular intervals, leaks are unlikely to occur. If a leak does happen, it is easy to detect – frost will definitely form outside the ammonia-cooled packing box, while if hydrogen or nitrogen is leaking, the temperature will be higher, resulting in no frost in the packing box and a higher temperature when touched. Furthermore, to prevent hydrogen and nitrogen from entering the ammonia system, installing a check valve will solve the problem easily. Is your company building a new plant?
Also, where should the check valve be installed? After all, HN gas leaks into the ammonia system through the packing gland. Please ask
During normal production, frost should not form; it shouldn’t happen! Was liquid ammonia not allowed to throttle and vaporize? Using liquid ammonia to cool the filler certainly prevents frosting! It is recommended to reduce the flow of ammonia through the needle valve and observe the situation; the packing gland will definitely frost over (I think the reason for this is obvious even without explanation). :Lol, with a better cooling effect of the filler, its service life will be longer.