Delayed coking method
A delayed coking method and mixed liquid phase technology, applied in the field of carbonization or coking process, can solve the problems of reducing foam layer, reducing coke yield, etc., to reduce volume, increase light oil yield, save operating costs and Process effect
Inactive Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0010] The invention provides a delayed coking method to increase the light oil yield of the existing delayed coking, reduce the height of the foam layer, and reduce the yield of coke. Granular and fluffy coke to solve the existing delayed coking by using defoamers, liquid enhancers, various light components to increase the yield of light oil, and using various additives to promote the formation of granular coke
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specific Embodiment approach
[0055] The present invention is illustrated below with specific examples, but the scope of the present invention is not limited.
[0056] Four groups of tests were carried out on the medium-scale delayed coking test device, namely Examples 1 to 3 and Comparative Examples. For the flow chart of the test device, see figure 1 . Comparative test with figure 1 The difference of the flow shown is that no hydrocyclone is provided, and the hot stream flows out of the heating furnace 1 and directly enters the first coke tower 4a or the second coke tower 4b. The raw oil 11 used in Comparative Example, Example 1, Example 2 and Example 3 is the same residual oil feed, its properties are shown in Table 1, and the feed rate is 6kg / h.
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Abstract
The invention aims at solving defects such as low light oil yield, high foam layer, and high coke yield of prior arts, and discloses a delayed coking method. The method is characterized in that: a mixed raw material is heated in a heating furnace; the heated hot material flow enters a primary hydrocyclone, such that a gas phase (1) and a mixed liquid phase (1) are obtained; the gas phase (1) is quenched and is delivered into a fractionation column; high-temperature steam is injected into the mixed liquid phase (1), and the mixture is delivered into a secondary hydrocyclone; the secondary hydrocyclone separates the mixed liquid phase (1) into a gas phase (2) and a mixed liquid phase (2). The gas phase (2) is delivered into a fractionation column; high-temperature steam is injected into the mixed liquid phase (2), and the mixture is delivered into a coke column; coke is discharged from the bottom of the coke column, and reaction oil gas is delivered into the fractionation column.
Description
technical field [0001] The invention relates to a carbonization or coking process, in particular to a delayed coking method. Background technique [0002] The processing of heavy crude oil is mainly based on the decarbonization process, and the delayed coking process has the advantages of strong raw material adaptability, simple process flow, relatively mature technology, and low equipment investment, and has become one of the important means of heavy oil deep processing. The main process of the traditional delayed coking process is: the high-temperature hot stream from the heating furnace enters the coke tower from the bottom of the coke tower through the oil transfer line, and the coking reaction is carried out in the coke tower. The oil gas generated by the reaction escapes from the top of the tower and goes to the coking fractionation tower for fractionation, mainly fractionating into coking gas, coker gasoline, coker diesel oil, coker wax oil, coker heavy wax oil and to...
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IPC IPC(8): C10G57/00
Inventor 陈小民黄新龙方长生秦如意王宝石刘淑芳王少峰王洪彬江莉
Owner CHINA PETROLEUM & CHEM CORP
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