長(zhǎng)慶混合原油加工方案和切割方案設(shè)計(jì)案例2.1原油評(píng)價(jià)簡(jiǎn)述長(zhǎng)慶混合原油的特點(diǎn)是密度小，比重指數(shù)大，酸值小，硫，氮，瀝青質(zhì)，膠質(zhì)，重金屬含量低，基屬分類為低碳中間-石蠟基，是優(yōu)質(zhì)的輕質(zhì)原油。切割I(lǐng)BP-180℃的餾分為重整料，該部分的餾分收率為16.38m％，芳烴的潛含量達(dá)24.88m％，辛烷值為43.7，硫含量低，此部分需要二次加工或調(diào)和生產(chǎn)方能合格。切割165-250℃的餾分為航煤，該部分收率為9.81m％，無煙火焰高度為26.7mm，閉口閃點(diǎn)為85℃，硫含量為0.017m％。切割230-330℃和305-370℃為柴油部分該部分收率分別為14.24m％和9.17m％。十六烷值分別為50和52。凝固點(diǎn)分別為-12和-8。柴油可以直接蒸餾得到合格產(chǎn)品。大于350℃的為重油部分，收率為50.4m％，密度小，粘度小，凝固點(diǎn)高，CP％值大的石蠟基特點(diǎn)；酸值，殘?zhí)浚?，氮含量均很低，結(jié)構(gòu)環(huán)RT較小，說明該部分餾分極易加工。2.2長(zhǎng)慶混合原油加工方案根據(jù)以上評(píng)價(jià)結(jié)果結(jié)合市場(chǎng)需求和經(jīng)濟(jì)效益等，長(zhǎng)慶混合混合原油選用燃料-潤(rùn)滑油型加工方案。圖2-4燃料—潤(rùn)滑油型加工方案1.3原油切割方案及油品性質(zhì)1.3.1體積分?jǐn)?shù)與質(zhì)量分?jǐn)?shù)的轉(zhuǎn)換根據(jù)公式：體積分?jǐn)?shù)（V%）=，計(jì)算出其體積分?jǐn)?shù)。長(zhǎng)慶混合原油實(shí)沸點(diǎn)蒸餾及窄餾分性質(zhì)沸點(diǎn)范圍，℃密度，g/cm3占原油，質(zhì)量%占原油，體積%20℃每餾分總收率每餾分總收率初-6660-80600.67142.322.323366-870.70942.544.863687-109100-1200.73672.597.4539109-129120-10.74412.7010.15312129-1470.75962.7312.88315147-1670.76782.8015.68318167-1880.77812.6618.34321188-2090.79072.8721.21324209-2220.80832.9824.19327222-2520.81303.1027.29330250-2600.82013.1630.45333260-2650.82323.1433.59336265-3000.82582.8536.44339300-3110.82622.7939.23342311-3270.82932.9442.17345327-3490.83412.9945.16348349-3500.83933.0448.20351350-3720.83993.0651.26354372-3910.84793.1454.40357391-4100.85063.1257.52360410-4230.86043.1560.67363423-4350.86523.2363.90366435-4410.87223.2067.18369441-4500.87983.3570.53372450-4700.88703.3973.92375470-4890.89003.3777.29378489-5100.91003.4780.76381圖2-1質(zhì)量實(shí)沸點(diǎn)蒸餾曲線圖2-2體積實(shí)沸點(diǎn)蒸餾曲線圖2-3原油密度中比曲線

1.3.2切割方案根據(jù)原油各餾分的實(shí)沸點(diǎn)蒸餾數(shù)據(jù)和產(chǎn)品性質(zhì)確定出原油常壓切割方案并查圖6-9[4]得到實(shí)沸點(diǎn)溫度，然后匯總于表2-2。長(zhǎng)慶混合原油常壓切割方案和產(chǎn)品性質(zhì)產(chǎn)品實(shí)沸點(diǎn)切割點(diǎn)℃實(shí)沸點(diǎn)沸程，℃收率，％ρ20g/cm3實(shí)沸點(diǎn)蒸餾溫度，℃體積分?jǐn)?shù)質(zhì)量分?jǐn)?shù)0％10％30％50％70％90％100％原油————0.8351———————重整料172.5初-18018.7916.380.73755974102130148175180航煤240165-25010.149.810.7742165170190207225241250輕柴油317.5230-33014.4814.240.82362302382612