Delayed coking of oil residues

A method of delayed coking of petroleum residues, comprising the steps of:

• coking a feedstock, wherein coke is deposited in a coke drum;
• fractionating any distillate products in a rectification column into vapour products including light and heavy gas oils and heavy bottoms;
• steaming coke with a water steam;
• water cooling the coke;
• introducing the products of the coke steaming and cooling steps into an absorber equipped with a plurality of mass-exchange assemblies;
• fractionating the steaming and cooling products into vapour and liquid phases in the absorber;
• producing low-volatility petroleum products from the vapour phase by introducing the heavy bottoms from a bottom part of the absorber into the mass-exchange assembly;
• cooling and condensation of the vapour components in a condenser/refrigerator and fractionating the cooling products in a fractionator into gas, petroleum products and water;
• wherein the produced heavy gas oil is split into a plurality of flows, wherein a first flow is used as a recirculate and is mixed with the feedstock in the evaporator column prior to coking, wherein a second flow dilutes the products of coke steaming and cooling prior to introducing it into the absorber, wherein a third flow is introduced into a top mass-exchange assembly of the absorber, wherein the heavy bottoms are returned from the bottom part of the absorber into the mass-exchange assembly located in a middle part of the absorber, into a third or fourth mass-exchange assembly, wherein a left-over part of the heavy bottoms from the absorber, as well as the separated petroleum products from the fractionator, are returned into the bottom part of the rectification column.