What are the requirements of coking units for vacuum residue?
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What are the requirements of coking units for vacuum residue? What are the differences in product distribution between coking processes that reduce slag and viscosity and those that do not?
The residual carbon value should not be too low~~otherwise the combustion value of the product will be very low
The difference between reduced-viscosity residue and vacuum residue is that a portion of the saturated hydrocarbons participates in cracking. . . This may cause the overall molecular size of the residue composition to decrease, making it lighter, and thus reducing its viscosity. . . Therefore, the coking tendency of viscosity-reduced residue oil may be lower than that of unviscosified residue oil. . . I only do qualitative analysis. . . Actual viscosity-reduced residue oil has not yet been tested in production for use in coking. . . :lol
To prevent excessive coking of the heating tubes in the coking furnace, the salt content in the coking feed is required to be no more than 15 micrograms per gram； The total metal content shall not exceed 1000 micrograms per gram. The sodium ion content is not more than 10 micrograms per gram.
Based on the operating experience of Guangdong Petrochemical, reducing the viscosity of residue before feeding it into the coker helps to increase the overall liquid yield, but it also results in increased energy consumption
Coke is also a product, and its quality must be ensured