塔里木盆地大涝坝凝析气处理装置的参数优化

塔里木盆地大涝坝凝析气处理装置的天然气设计处理量为25×10⁴ m³/d，而目前该装置的天然气实际处理量增至40×10⁴ m³/d，原料气的组成也有所变化，天然气变富，进气压力降低且生产装置的运行参数也与设计参数有一定偏差，导致装置的C₃及C₃⁺回收率仅为70%和81%。为此，借助模拟软件HYSYS分析了天然气经膨胀机组膨胀后的压力、低温分离器温度、脱乙烷塔理论塔板数、脱乙烷塔底重沸器温度、脱乙烷塔的进料位置和脱乙烷塔的进料温度对C₃及C₃⁺回收率的影响，并论述了在现有装置条件下对上述参数进行优化的可行性。优化结果表明：在优化条件下C₃及C₃⁺回收率分别得到大幅提高，C₃的回收率由原来的70%提高到现在的85%，增加了15%；C₃⁺的回收率也由原来的81%提高到现在的91%，增加了10%。

Parameter optimization for the Dalaoba gas condensate processing plant in the Tarim Basin

The daily capacity of the Dalaoba gas condensate plant in the Tarim Basin was previously designed to be 25×10⁴m³, but when its actual daily processing capacity increases up to be 40×10⁴m³, the feed gas becomes richer than before and its components are different; the inlet pressure lowers down and the operating parameters deviate from the designed ones, resulting in only 70% to 81% of C₃ and C₃⁺recovery rates. In view of this, the HYSYS simulator is adopted to analyze how such parameters affect the C₃ and C₃⁺recovery rates as the gas pressure through the compressor unit, the temperature at the low temperature separator, the theoretical plate numbers, inlet location and temperature of the deethanizer and its bottom reboiler temperature. In addition, the possibility of optimizing the above parameters is discussed with the existing plant. The results show that after optimization of those parameters, the recovery rate of C₃ increases from 70% to 85% and that of C₃⁺ from 81% to 91%.