| 摘要 |
PROBLEM TO BE SOLVED: To efficiently remove heavy oil components contained in a liquefied gas. SOLUTION: In adsorption towers 1 and 2, fibrous activated carbons 11 and 12 are installed, wherein LPG 3 is alternately passed through to allow adsorption and removal of heavy oil contents contained in LPG. The fibrous activated carbons 11 and 12 have micropore structures and rapidly adsorb and remove heavy oil components contained in LPG. When the fibrous activated carbon 11 or 12 adsorbs the heavy oil components, and its adsorption capacity approaches saturation, the adsorption tower 1 or 2, wherein LPG 3 is passed through, is switched to the other tower. In the adsorption tower 1 or 2 containing the fibrous activated carbon 11 or 12 with a deteriorated adsorption capacity, a high-temperature recycling gas 5 is passed through. After the heavy oil components are separated from the fibrous activated carbon 11 or 12 and recovered as a drain 6, a cooling air 7 is passed through for cooling to recycle the fibrous activated carbon 11 or 12. |
