CAJ | 학술논문

设计了一种用于天然气轻烃回收的DHX工艺，并考察了原料气预冷温度、膨胀机出口压力与原料气中C1/C2组成对DHX塔温度、丙烷压缩机功率、产品气增压机功率、膨胀机功率和C3+收率的影响。结果表明：丙烷压缩机功率和C3+产品收率均随着原料气预冷温度的降低先增大后减小；随着膨胀机出口压力的降低，DHX塔出口物料温度逐渐降低，产品气增压机功率、膨胀机功率和C3+产品收率均显著增加；原料气中n(C1)/n(C2)逐渐增大，使得DHX塔进出口物料温度明显降低，导致C3+产品收率逐渐增加。优化后DHX工艺为原料气预冷温度为-40℃，膨胀机出口压力为3.2MPa，C3+收率可达到97.18%。
설계료일충용우천연기경경회수적DHX공예，병고찰료원료기예랭온도、팽창궤출구압력여원료기중C1/C2조성대DHX탑온도、병완압축궤공솔、산품기증압궤공솔、팽창궤공솔화C3+수솔적영향。결과표명：병완압축궤공솔화C3+산품수솔균수착원료기예랭온도적강저선증대후감소；수착팽창궤출구압력적강저，DHX탑출구물료온도축점강저，산품기증압궤공솔、팽창궤공솔화C3+산품수솔균현저증가；원료기중n(C1)/n(C2)축점증대，사득DHX탑진출구물료온도명현강저，도치C3+산품수솔축점증가。우화후DHX공예위원료기예랭온도위-40℃，팽창궤출구압력위3.2MPa，C3+수솔가체도97.18%。
A DHX process for light hydrocarbon recovery from natural gas was designed, and the influences of feed gas pre-cooling temperature, outlet pressure of expander, and C1/C2 mole ratio of feed gas on DHX tower temperature, propane compressor power, compressor power of product gas, expander power and C3+ recovery rate were investigated. The results showed that propane compressor power and C3+recovery rate increased at first and then decreased with the decrease of feed gas pre-cooling temperature;the outlet temperature of DHX tower decreased while the compressor power of product gas, expander power and C 3+ recovery rate increased with the decrease of the outlet pressure of expander;and increasing C1/C2 mole ratio of feed gas led to the obvious decrease of the inlet and outlet temperature of DHX tower, and ultimately increased C3+recovery rate. The optimum operation parameters for the DHX process were feed gas pre-cooling temperature of-40℃and expander outlet pressure of 3.2MPa, and C3+recovery rate could reach 97.18%under these conditions.