INSTALLATION FOR OBTAINING GAS OIL AND SECONDARY FUEL OIL (OPTIONS) Russian patent published in 2023 - IPC C10G7/06 C10G9/00 

FIELD: raw materials processing.

SUBSTANCE: invention relates to the processing of heavy hydrocarbon raw materials and can be used in the oil refining industry. Two installation options are offered. The first installation option includes: fractionation unit 1, cracking furnace 2, first 3, second 4 and third 5 evaporators, tube separator 6, vacuum separator 7, mixer 8, recuperative heat exchanger 9, raw mixer 10 and multiphase pump 11. The second installation option instead of the raw mixer 10 and the multiphase pump 11, it includes a heavy gas oil vacuum separator 12, a vacuum device 13 and a refrigerator-condenser 14. During the operation of the first version of the installation, the raw material is divided into two streams. The first stream is heated in the heat exchanger 9 and sent for mixing with the second stream. The second stream is mixed in the mixer 10 with vacuum vapors from the separator 7 and the pump 11, after mixing with the first stream, it is fed as a heavy fraction to block 1. The total thermal conversion vapors are also fed to block 1 as a steam reflux. Gas, naphtha, light gas oil, heavy gas oil and VAT residue are removed from block 1, respectively. Heavy gas oil is mixed with naphtha and the circulating thermal conversion residue supplied from evaporator 4, the resulting mixture is heated in cracking furnace 2, the cracked products are separated in separator 6 into cracked vapors and cracked residue, which is fed to evaporator 3. From the evaporator 3, the first thermal reforming vapors and the first thermal reforming residue are removed, which are fed to the evaporator 4. The second thermal reforming vapors and the second thermal reforming residue are output from the evaporator 4, which is divided into streams of the circulating thermal reforming residue and the balance thermal conversion residue, which, according to line 31 is fed for mixing with VAT residue. The resulting mixture is sent to mixer 8, where it is mixed with cracking vapors discharged from separator 6 and fed to evaporator 5, from which the third thermal reforming residue is sent to separator 7, and the third thermal reforming pairs are removed, mixed with the first and second thermal reforming vapors. conversion and sent to block 1. Secondary fuel oil is removed from separator 7, cooled in heat exchanger 9 and removed from the plant, and vacuum vapors are also removed. The operation of the second version of the installation is characterized in that the vacuum vapors are cooled and condensed in the condenser 14 and fed into the heavy gas oil vacuum separator 12, from which the heavy gas oil is fed into the feed line after the heat exchanger 9 and the condenser 14 to form a heavy fraction supply line, and vapors from the heavy gas oil vacuum separator 12 are directed to the gas outlet line by means of a vacuum generating device 13.

EFFECT: increase in light gas oil yield.

2 cl, 2 dwg, 2 ex