What is the relationship between the discharge volume of the cyclic hydrogen compressor and the purity of hydrogen?
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What is the relationship between the discharge volume of the cyclic hydrogen compressor and the purity of hydrogen?
The lower the hydrogen purity, the higher the reading on the exhaust gauge will be
Under normal circumstances, the circulation volume of the compressor remains constant. However, when the hydrogen partial pressure in the circulating hydrogen is low, the circulation volume increases; the higher the purity of the circulating hydrogen, the lower the circulation volume. For example, if the circulation rate is 80,000 and the hydrogen sulfide level is 8,000 ppm, when the hydrogen sulfide level drops to 2,000, the circulation rate may decrease to 60,000–70,000.
The exhaust volume of the recycle hydrogen compressor has no direct theoretical relationship with the purity of hydrogen. The amount of recycle hydrogen is regulated by the speed of the recycler, but the flow rate of the recycler is generally measured using an orifice meter; this measurement is greatly affected by the composition and density of the recycle hydrogen. As a result, there is an inverse relationship between the exhaust volume of recycle hydrogen and the purity of hydrogen. Additionally, the exhaust volume of recycle hydrogen is also influenced by changes in the amount of cold hydrogen and mixed hydrogen.