催化重整反應(yīng)系統(tǒng)物料衡算

1. 催化重整反響系統(tǒng)物料衡算入 方出方Kg/h M%Kg/hM%重整穩(wěn)定油1865293.26進(jìn)料 20230 100 含氫氣體11985.99裂化氣體1500.75合計(jì) 20230 100 合計(jì)20230100芳烴潛含量、芳烴產(chǎn)率、芳烴轉(zhuǎn)化率的計(jì)算芳烴潛含量：所謂芳烴潛含量是指在催化重整生產(chǎn)芳烴C6C9芳烴〕時(shí)所能生產(chǎn)的芳烴量。C6芳烴潛含量=C6〔重×78/84+A〔8C7=C7〔重%×92/98+A〔重%〔10.8×92/98+2.36%=12.50%=C8〔重%〕1×06/112+A8〔重%〕=〔11.31×106/112+4.28〕%=14.98%C9=C9〔重%〕×120/126+A9〔重%〕=〔8.37×芳烴產(chǎn)率計(jì)算芳烴產(chǎn)率=重整穩(wěn)定油收率*重整穩(wěn)定油中芳烴含量A6產(chǎn)率=93.26%×5.14%=4.79% A7產(chǎn)率=93.26%×3.49%=12.58%A8產(chǎn)率=93.26%×9.09%=17.80% A9產(chǎn)率=93.26%×6.71%=15.58%所以，總芳烴產(chǎn)率=〔4.79+12.58+17.80+15.58〕%=50.75%芳烴轉(zhuǎn)化率計(jì)算芳烴轉(zhuǎn)化率=芳烴產(chǎn)率/芳烴潛含量A6轉(zhuǎn)化率=4.79%/5.85%=81.88% A7轉(zhuǎn)化率=12.58%/12.50%=100.64%A8轉(zhuǎn)化率=17.80%/14.98%=118.83%A9轉(zhuǎn)化率=15.58%/9.13%=170.65%總芳烴轉(zhuǎn)化率=50.75%/42.46%=119.52%上述數(shù)據(jù)匯于下表：工程A6A7A8A9合計(jì)芳烴潛含量%5.8512.5014.989.1342.46芳烴產(chǎn)率%4.7912.5817.8015.5850.75芳烴轉(zhuǎn)化率%81.88100.64118.83170.65119.52C6C6而環(huán)烷分子量要大于芳烴，所以芳烴增加的摩爾數(shù)少于環(huán)烷削減的摩爾數(shù)。3氫平衡——加氫裂化反響耗氫量計(jì)算C681.88%轉(zhuǎn)化為芳烴C6C681.88%轉(zhuǎn)化為芳烴C60%轉(zhuǎn)化為芳烴C7100%轉(zhuǎn)化為芳烴C70.64%轉(zhuǎn)化為芳烴C8100%轉(zhuǎn)化為芳烴C818.83%轉(zhuǎn)化為芳烴C9100%轉(zhuǎn)化為芳烴C970.65%轉(zhuǎn)化為芳烴則理論產(chǎn)氫量為：20230×{[〔4.79%-0.98%〕/78+〔12.50%-2.36%〕/92+〔14.98%-4.28%〕/106+〔9.13%-1.16%〕/120]×〔0.64%×12.50%/92+18.83%×14.98%/106+70.65%×9.13%/120〕×8}×1=521.67Kg/h實(shí)際得氫量M=0.908×2+0.0469×16+0.0225×30+0.0132×44+0.0052×58+0.001×72+0.0017×86=4.378循環(huán)氫中含氫率%=0.908×2/4.378×100%=41.48%循環(huán)氫中純氫量=20230×5.99%×41.48%=496.93Kg/h58+0.0239×72+0.0353×86=25.31裂化氣中含氫率%=0.352×2/25.31×100%=2.78%裂化氣中純氫量=20230×0.75%×2.78%=4.17Kg/h理論產(chǎn)氫量循環(huán)氣中氫量裂化氣中氫量實(shí)得氫量氫耗Kg/h理論產(chǎn)氫量循環(huán)氣中氫量裂化氣中氫量實(shí)得氫量氫耗Kg/h521.67496.934.17501.120.574理論溫降問(wèn)題的計(jì)算依據(jù)《石油煉制工程》515頁(yè)〔C9以上芳烴均以C9芳烴計(jì)〕〔1〕計(jì)算環(huán)烷脫氫反響熱反響熱〔吸〕=[〔4.79%-0.98%〕×2822+〔12.50%-2.36%〕×2345+〔14.98%-4.28%×2023+〔9.13%-1.16%〕×1675〕×20230×1=1385.8×104工程KJ/Kg環(huán)烷脫氫反響〔KJ/Kg產(chǎn)物〕烷烴環(huán)化脫氫反響〔KJ/Kg產(chǎn)物〕苯28223375甲苯23452742二甲苯20232282三甲苯16751926(2)烷烴環(huán)化脫氫反響熱熱〔吸〕=〔0.64%×125.50%×2742+18.85%×14.98%×2282+70.65%9.13%1926〕×20230×1=381.74×104 KJ/h加氫裂化反響熱加氫裂化量=20230-20230×93.26%-501.1=846.9Kg/h取加氫裂化反響熱為921KJ/Kg反響熱〔放〕=846.9×921=78×104KJ/h所以，總反響熱=〔1385.8+381.73-78〕×104=1689.53×104KJ/h反響器熱損失三個(gè)反響器外表積共70㎡,平均器壁溫度90℃，大氣溫度20℃，取散熱系數(shù)為62.8KJ〔m℃h。所以 散熱損失=62.×90-2〕70=30.8×104氫油混合平均比熱循環(huán)氫的平均比熱和平均分子量的計(jì)算如下：組成Yi〔體積〕相對(duì)分子量CpMiyiCpiYi%MiKJ/(Kmol℃)KJ/(Kmol℃)H290.8229.31.81626.6044C14.691658.60.7502.748C22.2530103.00.6752.318C31.3244148.60.5811.962C40.5258192.60.3021.002C50.1572236.70.1080.3551C60.1786281.20.1460.4780平均分子量平均比熱4.37835.468取油氣的平均比熱為3.4 KJ/(Kmol℃)。即油氣和循環(huán)氫的平均比熱為：3.4×20230/〔20230+20230×5.99%〕+35.468×2