Method and device for producing needle coke in batch feeding mode
AssigneesChina Petroleum & Chemical Corporation, Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd.
InventorsDan GUO, Shuandi HOU, Renqing CHU, Yun WU, Yuanyuan ZHANG
Life of this patent
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Abstract
A method for producing a needle coke includes a step of sequentially adding n feedstock oils to a coking reaction at predetermined time intervals. Assuming that an i-th feedstock oil has an aromatic carbon ratio of A (in mol %), an i+1-th feedstock oil has an aromatic carbon ratio of B (in mol %), a first feedstock oil has an aromatic carbon ratio of A1 (in mol %), and a n-th feedstock oil has an aromatic carbon ratio of B1 (in mol %), then B≥A, and B1>A1.
Claims36
A method for producing a needle coke, comprising a step of sequentially adding n feedstock oils (n is an integer equal to or greater than 2, preferably 2-15 or 3-5) to a coking reaction at predetermined time intervals, wherein assuming that an i-th (n−1≥i≥1) feedstock oil has an aromatic carbon ratio of A (in mol %), an i+1-th feedstock oil has an aromatic carbon ratio of B (in mol %), a first feedstock oil has an aromatic carbon ratio of A1 (in mol %), and a n-th feedstock oil has an aromatic carbon ratio of B1 (in mol %), then B≥A (preferably B−A≥5 mol % or B−A≥10 mol %), and B1>A1 (preferably B1−A1≥10 mol % or B1−A1≥20 mol %).
A device for producing a needle coke, which comprises the following units:
- a feedstock oil supplying unit, which is configured for providing n feedstock oils (n is an integer equal to or greater than 2, preferably 2-15 or 3-5), assuming that an i-th (n−1≥i≥1) feedstock oil has an aromatic carbon ratio of A (in mol %), an i+1-th feedstock oil has an aromatic carbon ratio of B (in mol %), a first feedstock oil has an aromatic carbon ratio of A1 (in mol %), and a n-th feedstock oil has an aromatic carbon ratio of B1 (in mol %), then B≥A (preferably B−A≥5 mol % or B−A≥10 mol %), and B1>A1 (preferably B1−A1≥10 mol % or B1−A1≥20 mol %),
- a coking unit, which is configured for receiving said n feedstock oils, and causing them to undergo a coking reaction to obtain a needle coke,
- a control unit, which is configured for feeding said n feedstock oils to the coking unit in sequence from said feedstock oil supplying unit at a predetermined time interval.
Dependencies are inferred from the claim text.