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題名 | 蒸餾工場酸水汽提塔操作評估及改善=The Evaluation and Improvement of Sour Water Stripper in Topping Unit |
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作者 | 張仁耀; 陳朝鈺; 賴維新; 王羚; 賴宗成; 王昭彬; 林承澤; 侯志孟; Chang, Jen-yaw; Chen, Chao-yuh; Lai, Wei-hsin; Wang, Ling; Lai, Chong-chien; Wang, Chao-pin; Lin, Cheng-tse; Hou, Chih-meng; |
期刊 | 石油季刊 |
出版日期 | 20171200 |
卷期 | 53:4 2017.12[民106.12] |
頁次 | 頁85-95 |
分類號 | 460.25 |
語文 | chi |
關鍵詞 | 酸水汽提塔; 氨; 硫化氫; Sour water stripper; Ammonia; Hydrogen sulfide; |
中文摘要 | 酸水汽提塔設計上是將煉油廠製程中所產生的酸水藉由蒸氣汽提除去其中的H_2S 及NH_3,酸水汽提塔的操作往往攸關整體煉油廠的營運,當酸水汽提塔操作不佳或未達到設計規範要求,其處理後廢水中若NH_3 含量太高,則廢水工場之活性汙泥無法承受,當酸水無法完全去化,相關生產製程也只能降低煉量因應。本研究乃針對蒸餾工場之酸水汽提塔進行評估,該酸水汽提塔原設計主要處理蒸餾工場主蒸餾塔塔頂迴流槽之酸水,但實際操作上需另外處理柴油加氫處理工場之酸水,由於兩股酸水加總之實際水質與設計值相差極大,造成目前汽提塔無法負荷,只能偏離原設計操作,但是由於壓力降低及塔頂溫度偏高,將使許多水分夾帶至下游之硫磺工場,造成下游操作問題,雖然目前暫以緩衝槽將水分迴流回到進料,終究浪費能源,亦影響操作空間,並非長久之計。經由原設計值及各種不同操作變數;包括酸水量、進料成分、再沸器及冷凝器負荷變化及不同塔效率之模擬了解,此酸水汽提塔可經由調整操作變數來達到更好的操作效果,也經由模擬結果了解各種不同進料量及進料濃度之操作範圍及限制,經過操作可行性及設備評估,決定提升再沸器及冷凝器熱負荷,經現場實際測試,修改後酸水汽提塔性能可大幅減少塔頂酸水迴流重煉量,避免操作不穩定,而使塔底水質超標。改善後可提升進料量使操作更有彈性同時整體能耗亦低於原操作情況,進而符合原設計要求。 |
英文摘要 | The sour water stripper in the topping unit is designed to strip H_2S and NH_3 from sour water. In the real case, the stripper is also used to deal with the sour water coming from the HDS unit. Due to the actual concentration of H_2S and NH_3, in addition to the feed rate are much different from the original design, the operation of the stripper deviates from the design case and the stripped water goes beyond the specification required. Moreover, the gas stream coming from the top of stripper contains too much water and cause operational difficulty for the downstream sulfur recovery unit. In this study, we evaluate the effects of feed rate, H_2S and NH_3 concentration, the duty of reboiler and condenser and the tray efficiency to the stripper, and try to seek the practical solution to solve the problem. The most feasible way in the survey is to increase the duty of reboiler and condenser. After revamping the reboiler and condenser, the operational performance of sour water stripper in the topping unit is improved with satisfaction , and the moisture contained in the top gas stream is also under control. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。