石油与天然气化工
石油與天然氣化工
석유여천연기화공
CHEMICAL ENGINEERING OF OIL AND GAS
2015年
4期
44-49
,共6页
乔在朋%蒋洪%牛瑞%陈倩
喬在朋%蔣洪%牛瑞%陳倩
교재붕%장홍%우서%진천
油田伴生气%工艺改进%冷量利用%换热网络%丙烷回收
油田伴生氣%工藝改進%冷量利用%換熱網絡%丙烷迴收
유전반생기%공예개진%랭량이용%환열망락%병완회수
oilfield associated gas%scheme improvement%cold energy utilization%heat exchanger network%propane recovery
油田伴生气气质富、压力低，普遍采用直接换热工艺回收丙烷及丙烷以上重烃，存在系统冷量利用不合理、气质适应性差、系统能耗高等问题。以某油田油气处理厂装置为例，以提高装置整体经济效益为目标，提出了工艺改进方案。改进工艺采用两级分离方式，脱乙烷塔塔顶增设回流罐，降低重接触塔塔顶进料中丙烷含量，增强重接触塔的吸收作用，提高丙烷收率；应用夹点理论设计冷箱的换热网络，提高系统的冷热集成度和冷量利用率，冷箱改进后，脱乙烷塔塔底重沸器负荷降低189kW，降幅12．9％，丙烷制冷压缩机负荷减小142．8kW，冷量利用更加合理。工艺改进后装置丙烷收率和液化石油气产量得到了大幅提高，装置总体能耗变化不大，改进工艺每年可提高装置经济收益1797万元，经济效益可观，建议在类似工况条件下推广应用。
油田伴生氣氣質富、壓力低，普遍採用直接換熱工藝迴收丙烷及丙烷以上重烴，存在繫統冷量利用不閤理、氣質適應性差、繫統能耗高等問題。以某油田油氣處理廠裝置為例，以提高裝置整體經濟效益為目標，提齣瞭工藝改進方案。改進工藝採用兩級分離方式，脫乙烷塔塔頂增設迴流罐，降低重接觸塔塔頂進料中丙烷含量，增彊重接觸塔的吸收作用，提高丙烷收率；應用夾點理論設計冷箱的換熱網絡，提高繫統的冷熱集成度和冷量利用率，冷箱改進後，脫乙烷塔塔底重沸器負荷降低189kW，降幅12．9％，丙烷製冷壓縮機負荷減小142．8kW，冷量利用更加閤理。工藝改進後裝置丙烷收率和液化石油氣產量得到瞭大幅提高，裝置總體能耗變化不大，改進工藝每年可提高裝置經濟收益1797萬元，經濟效益可觀，建議在類似工況條件下推廣應用。
유전반생기기질부、압력저，보편채용직접환열공예회수병완급병완이상중경，존재계통랭량이용불합리、기질괄응성차、계통능모고등문제。이모유전유기처리엄장치위례，이제고장치정체경제효익위목표，제출료공예개진방안。개진공예채용량급분리방식，탈을완탑탑정증설회류관，강저중접촉탑탑정진료중병완함량，증강중접촉탑적흡수작용，제고병완수솔；응용협점이론설계랭상적환열망락，제고계통적랭열집성도화랭량이용솔，랭상개진후，탈을완탑탑저중비기부하강저189kW，강폭12．9％，병완제냉압축궤부하감소142．8kW，랭량이용경가합리。공예개진후장치병완수솔화액화석유기산량득도료대폭제고，장치총체능모변화불대，개진공예매년가제고장치경제수익1797만원，경제효익가관，건의재유사공황조건하추엄응용。
To treat oilfield associated gas with rich quantities and low pressure ,direct heat ex‐change technology is used to recover propane and products .Problems of unreasonable utilization of system cold energy ,poor adaptability of gas composition and high system energy consumption are generally existed .Taking an oil and gas processing unit as example ,the improvement scheme is put forward to improve the overall economic benefits of the unit .Two‐stage separation process is used . T he propane recovery rate is increasing by adding reflux tank on the top of deethanizer ,reducing the propane content in top feed of DHX tower ,enhancing absorption effect of DHX tower ;and the heat exchanger network of cold box is designed with the pinch point theory to improve the cold and heat in‐tegration of system and the utilization rate of cooling energy .After improving of cold box ,the reboil‐er load of deethanizer reduces 189 kW ,decreasing of 12 .9% ,the compressor load of propane refrigera‐tion reduces 142 .8 kW ,and the utilization of cold energy is more reasonable .By improving scheme , the rate of propane recovery and the production of liquefied petroleum gas have increased greatly ,the overall energy consumption of unit have changed little ,and a considerable economic benefit would be achieved .Suggestions are recommended for application in similar working condition .
