39results about How to "Improved deposition distribution" patented technology

The invention discloses a combined process for conversion of residual oil. The combined process comprises the following steps: (1) allowing a residual oil raw material to enter into a solvent deasphalting unit so as to obtain deasphalted oil and de-oiled asphalt; (2) mixing the de-oiled asphalt obtained in step (1) with heavy distillate oil of a catalytic cracking unit and allowing an obtained mixture to enter into a fluidized bed hydrotreatment unit for fluidized bed hydrotreatment; (3) mixing an effluent of fluidized bed hydrotreatment obtained in the step (2) with the deasphalted oil and carrying out fixed bed hydrotreatment, wherein generated oil of an effluent of fixed bed hydrotreatment is used as a raw material for the catalytic cracking unit; and (4) mixing the de-oiled asphalt with a catalytic heavy fraction obtained after dry gas, liquefied gas and catalytic gasoline are separated from an effluent of a catalytic cracking reaction and subjecting an obtained mixture to fluidized bed hydrotreatment. Compared with the prior art, the combined process provided by the invention has the advantages of wide sources of the raw materials, low equipment investment, stable operation, a long operation period and a good synergistic and coordination effect.

The invention discloses a process for treating inferior oil, the process includes a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone; the process includes the following contents: a residual oil raw material and hydrogen are mixed, and in turn pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are in series connection, after gas-liquid separation of a hydrotreating reaction zone reaction effluent, a gas phase is recycled back to the hydropretreating reaction zone and / or the hydrotreating reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for catalytic cracking reaction, a catalytic cracking reaction effluent is separated to obtain a dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel oil fraction, catalytic cracking heavy cycle oil and catalytic cracking oil slurry, and the catalytic cracking diesel and the catalytic cracking heavy cycle oil are partially or totally recycled back to the hydrotreating reaction zone for hydrotreating reaction. The method can prolong the stable operation period of a device.

The invention discloses a residual oil hydrogenation treatment and catalytic cracking combined processing method, which comprises: performing the hydrogenation reaction of a residual oil raw material in the presence of hydrogen and a hydrogenation treatment catalyst, and performing gas-liquid separation of efflux of hydrogenation reaction, wherein a gas phase is circularly used in a hydrogenation reaction, and a liquid phase is fractioned to form a light component and a heavy component; allowing a light component to enter a reactor from the bottom of a catalytic cracking riser reactor, allowing a heavy component to enter the reactor as secondary feed of the catalytic cracking riser reactor and performing a catalytic cracking reaction; and separating a dry gas, a liquefied gas and a gasoline fraction from efflux of a catalytic cracking reaction, wherein the fractions of diesel are not separated and enter a residual oil hydrogenation device after filtration. Compared with the prior art, the method can produce high-octane number gasoline and high-added-value liquefied gas to a maximum degree; meanwhile, the method can fully utilizes reaction heat and reduces production energy consumption.

The present invention discloses a residual oil hydrogenation treatment and catalytic cracking combination method. According to the method, the residual oil hydrogenation treatment process comprises two hydrogenation protection reactors, wherein the two hydrogenation protection reactors are arranged in parallel connection, the feed material of the first hydrogenation protection reactor is the residual oil raw material, and the feed material of the second hydrogenation protection reactor is the catalytic cracking heavy fraction; the effluents of the two reactors are mixed, and the resulting mixture enters a hydrogenation treatment reaction zone to carry out a hydrogenation reaction; the effluent of the hydrogenation reaction is subjected to gas-liquid separation, wherein the resulting gas phase is circularly adopted for the hydrogenation reaction, and the liquid phase directly enters a catalytic cracking apparatus without fractionation; the effluent of the catalytic cracking reaction is separated to obtain dry gas, liquefied gas, catalytic cracking gasoline, and catalytic cracking heavy fraction after catalytic cracking of the gasoline, wherein the catalytic cracking heavy fraction is adopted as the feed material of the second hydrogenation protection reactor. With the method, the operating period of the residual oil hydrogenation apparatus can be prolonged, the maximum amount of the catalytic cracking gasoline can be produced, and the equipment investment can be saved.

The invention discloses a method for treating residual oil by a combined process. After the inferior feedstock oil is mixed with hydrogen, it first passes through the hydrotreating pretreatment zone; the reaction effluent and the catalytic cracking circulating oil enter the hydrotreating reaction zone to separate the reaction effluent to obtain the hydrogenated residue oil for catalytic cracking reaction to obtain the circulating oil And / or the oil slurry is circulated to the hydrotreatment reaction zone; wherein the reaction temperature t1 of the hydrotreatment reaction zone is higher than the reaction temperature t2 of the hydrotreatment reaction zone. The method of the invention can improve the utilization rate of the hydrotreating main catalyst, prolong the operation period of the combined device, and increase the operation efficiency of the device.