Problems with ammonia compressors
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The ammonia compressor I have is used to compress gaseous ammonia, turning it into liquid ammonia; it is a piston-type compressor. If the ammonia entering the compressor contains a large amount of nitrogen, will compressing this gas cause damage to the compressor? Please discuss this, thank you
As long as it contains no other particulate impurities, it will not damage the compressor. If ammonia compressors are used for cooling, it will affect the exhaust pressure and exhaust temperature, which in turn affects the cooling capacity
Different adiabatic indices, with ammonia being 1.24 and nitrogen 1.4, cause the exhaust temperature to be higher than normal. Secondly, excessive nitrogen is detrimental to the liquefaction of recovered ammonia.
1. The inclusion of nitrogen does not cause damage to the compressor； 2. After nitrogen is mixed in, the temperatures at the condenser and evaporator of the refrigeration compressor will deviate from normal, resulting in reduced performance
The compressor is designed based on the specific density of ammonia; with a constant piston thrust and a constant compression volume, the outlet pressure of nitrogen will decrease, and the air compression volume will drop as well, but this does not cause any problems. Moreover, it’s sufficient to discharge the nitrogen after compressing and cooling it, and it will become clean quickly.