On cryogenic separation of heavy hydrocarbons [LNG]
Thread Content
After introducing natural gas into the cold box until it reaches a certain temperature, it is then drawn out and introduced into the separation tank, before being introduced back into the cold box. Question: 1. To what temperature should it be cooled? That is, what triggers it when it reaches a certain position in the cooling process? 2. After introduction and then re-introduction, the temperature will rise – will this affect the production of liquefied natural gas? 【It adopts a mixed refrigerant stage-by-stage cooling system】
1. The starting temperature should be calculated based on the gas properties to ensure that the lower section does not freeze up； (The extraction point remains fixed; the temperature at this point is controlled by adjusting the composition and amount of the refrigerant.) 2. The temperature rise is small, so it has little impact on LNG production (the temperature in the regenerative cooler is slightly lower than the value calculated theoretically)
Could the separated heavy hydrocarbons have other uses? We are mainly terpenes