化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2015年
7期
2086-2091
,共6页
展宝瑞%李涛%马宏方%应卫勇%房鼎业
展寶瑞%李濤%馬宏方%應衛勇%房鼎業
전보서%리도%마굉방%응위용%방정업
Aspen Plus 模拟%甲醇制烯烃%脱甲烷塔%油吸收
Aspen Plus 模擬%甲醇製烯烴%脫甲烷塔%油吸收
Aspen Plus 모의%갑순제희경%탈갑완탑%유흡수
Aspen Plus simulation%methanol to olefin%demethanizer%oil absorption
选择“前脱丙烷”流程对甲醇制烯烃粗产物进行分离。先利用高低塔脱丙烷工艺,然后经过脱甲烷塔、脱乙烷塔、乙烯精馏塔、丙烯精馏塔,最终得到聚合级的烯烃产品,其中脱甲烷工段采用“预切割-油吸收”脱甲烷工艺,使用耗能较小的中冷分离,吸收剂选择产自工艺自身的丙烷产品。丙烯精馏工段采用双塔预分流程,降低塔高。采用 Aspen Plus 流程模拟软件对脱甲烷工段进行模拟和优化,选用 Radfrac 精馏模型和 RKS-BM 热力学模型进行计算,对脱甲烷工艺段进料位置、塔板数、回流比进行灵敏度分析,并确定出丙烷吸收剂的用量和温度,最终得到纯度为99.98%的乙烯和99.90%的丙烯。
選擇“前脫丙烷”流程對甲醇製烯烴粗產物進行分離。先利用高低塔脫丙烷工藝,然後經過脫甲烷塔、脫乙烷塔、乙烯精餾塔、丙烯精餾塔,最終得到聚閤級的烯烴產品,其中脫甲烷工段採用“預切割-油吸收”脫甲烷工藝,使用耗能較小的中冷分離,吸收劑選擇產自工藝自身的丙烷產品。丙烯精餾工段採用雙塔預分流程,降低塔高。採用 Aspen Plus 流程模擬軟件對脫甲烷工段進行模擬和優化,選用 Radfrac 精餾模型和 RKS-BM 熱力學模型進行計算,對脫甲烷工藝段進料位置、塔闆數、迴流比進行靈敏度分析,併確定齣丙烷吸收劑的用量和溫度,最終得到純度為99.98%的乙烯和99.90%的丙烯。
선택“전탈병완”류정대갑순제희경조산물진행분리。선이용고저탑탈병완공예,연후경과탈갑완탑、탈을완탑、을희정류탑、병희정류탑,최종득도취합급적희경산품,기중탈갑완공단채용“예절할-유흡수”탈갑완공예,사용모능교소적중랭분리,흡수제선택산자공예자신적병완산품。병희정류공단채용쌍탑예분류정,강저탑고。채용 Aspen Plus 류정모의연건대탈갑완공단진행모의화우화,선용 Radfrac 정류모형화 RKS-BM 열역학모형진행계산,대탈갑완공예단진료위치、탑판수、회류비진행령민도분석,병학정출병완흡수제적용량화온도,최종득도순도위99.98%적을희화99.90%적병희。
In this work the “front-end depropanization” process to separate methanol to olefins crude products was studied. First the high and low pressure depropanizer distillation tower was utilized,then through demethanizer,deethanizer,ethylene fractionator and propylene fractionator, the paradigmatic level olefin product was obtained , in which the “pre-cutting-oil absorption demethanation” process was applied in the demethanizing section. Smaller energy was consumed through intercooling method and propane produced from the process itself was selected as absorbent. The propylene distillation section used pre-fractionator process to reduce the height of tower. Aspen Plus was utilized to simulate and optimize the demethanizer section,Radfrac distillation model and RKS-BM thermodynamic model were applied to calculate,and based on the sensitivity analysis,the section’s feed entrance point,stage number and reflux ratio were optimized. In addition,the dosage and temperature of dimethyl methane absorbent were confirmed. Finally,ethylene at a purity degree of 99.98% and propylene at a purity degree of 99.90% were obtained.