Method for blending and producing RMG180 marine fuel oil and produced RMG180 marine fuel oil

Abstract

The invention provides a method for blending and producing RMG180 marine fuel oil and the produced RMG180 marine fuel oil, and relates to the technical field of production of the RMG180 marine fuel oil. According to the invention, solid removal is carried out after high-viscosity heavy catalytic slurry oil and catalytic diesel oil are mixed, so that the problem that the high-viscosity heavy slurry oil is mixed into low-sulfur ship combustion is solved; the VRDS atmospheric pressure residual oil is subjected to reduced pressure distillation, and the VRDS atmospheric pressure residual oil is blended to produce the low-sulfur ship fuel, so that the graded utilization of the VRDS atmospheric pressure residual oil is realized, the ship fuel production cost is reduced, and the quality of catalytic cracking raw materials is improved.

Description

Technical Field

[0001] The invention relates to the technical field of production of RMG180 marine fuel oil, and in particular to a method for producing RMG180 marine fuel oil by blending heavy distillate oil of VRDS atmospheric residue, decatalyzed slurry oil, diesel and the like. Background Art

[0002] The current marine fuel oil standard GB17411-2015 stipulates that when a ship is sailing in general areas at sea, the sulfur content of heavy marine fuel oil should not exceed 0.5%, and it should also meet the specific requirements of each port. Measures to reduce ship pollutant emissions include switching to low-sulfur fuel oil, adding ship after-treatment equipment, reducing ship speed, using alternative fuels, and establishing emission control areas. Among them, the use of low-sulfur fuel oil is the most effective and easiest preferred measure to reduce pollutant emissions.

[0003] Since sulfur is continuously enriched in the end product during the crude oil refining process, the production technology route of low-sulfur heavy marine fuel oil is related to the sulfur content of the processed crude oil. At present, the process routes for producing residual marine fuel oil with a sulfur mass fraction of less than 0.5% mainly include: (1) Enterprises that process low-sulfur crude oil can directly produce or blend low-sulfur heavy marine fuel oil using low-sulfur residual oil from atmospheric and vacuum units. Atmospheric residual oil can be produced directly; vacuum residual oil has a high viscosity and needs to be reduced by using devices such as visbreaking or catalytic diesel or catalytic oil slurry. Considering the high price of low-sulfur crude oil and limited resources, the production cost of residual marine fuel will increase. (2) Enterprises that process sulfur-containing and high-sulfur crude oil, the residual oil produced by atmospheric and vacuum units cannot meet the requirements of being directly used as low-sulfur marine fuel oil. The mature process is to rely on the residual oil hydrogenation process and use low-sulfur secondary processed residual oil to blend and produce low-sulfur marine fuel oil. This route is rich in resources, but the desulfurization cost is relatively high. Therefore, using low value-added products as blending components and reducing the blending cost of blended marine fuel oil is an important task in the current research and development and production of marine fuel oil.

[0004] The second process route is adopted to produce low-sulfur marine fuel by blending, with hydrodesulfurization (VRDS) atmospheric residue as the main blending distillate oil, and the proportion of VRDS atmospheric residue exceeds 70%. However, VRDS atmospheric residue is the raw material of the catalytic cracking unit. The capacity of the fixed-bed residue hydrogenation unit of the refinery matches the subsequent processing capacity such as catalytic cracking. If too much VRDS atmospheric residue is used to produce low-sulfur marine fuel, the processing load of the catalytic cracking unit will be reduced, affecting the output and efficiency of refined oil. In addition, the density and viscosity of the low-sulfur heavy marine fuel produced by this scheme have excess quality. Therefore, this scheme separates the VRDS atmospheric residue into light and heavy fractions, and the light fraction is used as the raw material of the catalytic cracking unit, and the heavy fraction is used to blend marine fuel. This not only improves the quality of the catalytic raw material, but also reduces the excess quality of marine fuel, which is conducive to improving the overall efficiency. In the process of marine fuel blending production, catalytic oil slurry is the main low value-added product to reduce the excess quality and cost of marine fuel. However, the large amount of aluminum silicate catalyst dust contained in the catalytic oil slurry will cause the aluminum-silicon content of the marine fuel product to exceed the standard and cause engine wear after being blended into low-sulfur marine fuel. Therefore, the catalytic oil slurry can only be used to blend and produce marine fuel after it is desolvated. At present, many refining and chemical companies use the desolvated oil slurry to blend marine fuel. However, catalytic oil slurry is a mixture with a relatively complex composition and large changes in properties. It often has high viscosity, high density, and difficulty in desolvation. This part of inferior high-viscosity heavy oil slurry is difficult to desolvate and is generally used to produce petroleum coke, and its use value is not effectively utilized.

[0005] The difficulties in blending high-viscosity heavy catalytic oil slurry with marine fuel are: (1) There are catalyst residues in the catalytic oil slurry, and the aluminum and silicon contents are relatively high. Directly blending it into low-sulfur marine fuel will cause engine wear, and the oil slurry must be desolvated. (2) High-viscosity heavy catalytic oil slurry has a high density, high viscosity, and poor fluidity. Catalyst dust is stably suspended in the catalytic oil slurry and is difficult to remove from the oil slurry. Therefore, oil slurry desolvation is a key step in the entire process. Only by ensuring that the catalytic oil slurry is effectively desolvated can it be used as a blending component oil for low-sulfur marine fuel. Existing oil slurry desolvation technologies are mostly suitable for medium and low viscosity catalytic oil slurries, but not for high-viscosity heavy oil slurries.

[0006] The difficulty in blending VRDS vacuum residue with marine fuel lies in the fact that the properties of VRDS vacuum residue are quite different from those of diesel and catalytic oil slurry, especially the distillation range of VRDS vacuum residue and diesel. The final distillation point of catalytic diesel is ≤400℃, and the initial distillation point of VRDS vacuum residue is ≥490℃. When the two oil products are blended, the asphaltene in the VRDS vacuum residue aggregates. Therefore, ensuring the stability and compatibility of low-sulfur marine fuel is the key technology in the blending process.

[0007] Patent CN 102888244A discloses a method for producing low-sulfur marine fuel oil, wherein the catalytic oil slurry is heated and filtered with precision filtering equipment to remove tiny catalyst particles in the slurry, and then mixed with hydrogen and heated, and the mixture is contacted with a residual oil hydrofining catalyst, a distillate oil hydrofining catalyst, and a distillate oil hydrocracking catalyst, and the hydrogenation catalytic mixture is reacted, and the obtained reactants are subjected to oil and gas separation and fractionation to obtain tail oil fractions, and the tail oil fractions are mixed with vacuum residue oil in different proportions to obtain finished products. The method of the present invention uses a large investment in filtering equipment, and the liquid loss is relatively large during actual operation.

[0008] CN102002385A discloses a device and method for separating residues from catalytic cracking oil slurry, which comprises at least two filter groups, each filter group is composed of a pre-filter and a fine filter, the pre-filter is a wedge-shaped metal winding wire filter element with a filtration accuracy of 2 to 10 microns, and the fine filter is an asymmetric metal powder sintered filter element with an accuracy of 0.2 to 1.0 microns. When this technology filters high-viscosity heavy catalytic oil slurry, the catalyst powder is entrained in the heavy components of the catalytic oil slurry, which is difficult to remove by filtering means. At the same time, the heavy components of the catalytic oil slurry are easily intercepted on the filter screen during the filtration process, resulting in poor filtration effect and loss of heavy components. Summary of the invention

[0009] In view of the above problems, the present invention performs actual boiling point cutting on VRDS atmospheric residue, cuts the heavy component, namely VRDS vacuum residue, to be blended with ship fuel, and the light component can be used as catalytic cracking feedstock oil. The lightness of the catalytic feedstock can improve the quality of the catalytic feedstock, increase the yield of catalytic liquefied gas and gasoline, reduce the energy consumption of the catalytic device, and help improve the efficiency of the device. The present invention develops a desolidification technology suitable for inferior high-viscosity heavy oil slurry. The desolidified oil slurry is used to blend ship fuel, realizing the low-value high-use of inferior high-viscosity heavy oil slurry.

[0010] One of the objects of the present invention is to provide a method for blending and producing RMG180 marine fuel oil.

[0011] A second object of the present invention is to provide RMG180 marine fuel oil produced by the method.

[0012] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0013] In a first aspect, the present invention provides a method for blending and producing RMG180 marine fuel oil, comprising the following steps:

[0014] Preparation of VRDS vacuum residue: VRDS atmospheric residue is deep-drawn in a true boiling point distillation device, and the distillation is terminated when the atmospheric pressure temperature is 490-550°C. The bottom oil obtained has an initial distillation point of ≥490°C in the distillation range of the bottom oil;

[0015] Preparation of desolidified mixed crude oil: high viscosity heavy catalytic oil slurry is mixed with diesel, heated, kept constant temperature, and stirred; then oil slurry settling agent is added, first preliminarily mixed in a mixer, and then dispersed by ultrasonic mixing; heat preservation and standing, 95% of the mixed crude oil in the upper layer of the whole volume is extracted;

[0016] Blending RMG180 marine fuel oil: Blend VRDS vacuum residue oil and desolidified mixed crude oil in a certain proportion, add heavy oil compatibilizer after heating and stir until the mixture is uniform to obtain RMG180 marine fuel oil.

[0017] Preparation of VRDS vacuum residue:

[0018] The VRDS atmospheric residue has a kinematic viscosity at 50°C of 200.0 to 400.0 mm 2 / s, density at 20℃ is 880~980kg / m 3 , sulfur content is less than 0.5%.

[0019] In some embodiments, the deep drawing pressure of the real boiling point distillation apparatus is 50-200 Pa.

[0020] In some embodiments, after distillation, when the temperature in the kettle drops to 150° C., the pressure is released, and at this time, 200 to 300 ppm of polymerization inhibitor is added to the bottom oil of the kettle, and stirred for 30 minutes;

[0021] Preferably, the polymerization inhibitor is one or more of dodecylbenzenesulfonic acid, N,N-dimethylamide and dodecylresorcinol, preferably a mixture of dodecylbenzenesulfonic acid, N,N-dimethylamide and dodecylresorcinol in a mass ratio of 4-6:1-3:1-3.

[0022] When catalytic diesel, catalytic oil slurry and vacuum residue are mixed, asphaltene is very easy to flocculate and deposit as the temperature, pressure or composition changes. The inhibitor effectively prevents the flocculation and deposition of asphaltene, ensuring the good stability of low-sulfur marine fuel.

[0023] Preparation of desolidified mixed crude oil:

[0024] The high viscosity heavy catalytic oil slurry has a density of 1000-1200 kg / m 3 , 50℃ kinematic viscosity is 1300~2300mm 2 / s, the total aluminum silicon content is 200-400 mg / kg.

[0025] The diesel is one or more of catalytic diesel, ethylene diesel, and coking diesel, and has a density of 920-1020 kg / m at 20°C. 3 , 50℃ kinematic viscosity is 1.0~10.0mm 2 / s, closed cup flash point greater than 65°C, preferably catalytic diesel.

[0026] In some embodiments, the mixing mass ratio of high viscosity heavy catalytic oil slurry to diesel is 1.0:0.5-2.0.

[0027] In some embodiments, the temperature is raised to 80-85° C., maintained at the constant temperature for 20-30 min, and stirred for 20-30 min.

[0028] In some embodiments, the oil slurry settling agent is one or more of polyvinylamine, polyacrylamide, formaldehyde and phenol, preferably a mixture of polyvinylamine, polyacrylamide, formaldehyde and phenol in a mass ratio of 6 to 8:3 to 5:1 to 3:1 to 3;

[0029] The added amount of the oil slurry sedimentation agent is 500-1000ppm.

[0030] In some embodiments, the ultrasonic mixing temperature is 80-90° C., the ultrasonic frequency is 40-50 kHz, and the ultrasonic mixing time is 10-15 min.

[0031] The ultrasonic frequency and time must be within a matching range. If the frequency is too high or the time is too long, the synergistic desolidification effect of the compound sedimentation agent will be poor. If the frequency is too low or the time is too short, the sedimentation agent will not be able to fully combine with the catalyst dust in the oil slurry.

[0032] In some embodiments, the heat preservation and standing temperature is 80-90° C., and the standing time is 48-60 hours.

[0033] The main component of catalyst dust is aluminum silicate. The desolidification effect and whether the aluminum-silicon content of the blended marine fuel meets the requirements are examined through analysis of silicon and aluminum content.

[0034] Blending RMG180 marine fuel oil:

[0035] In some embodiments, the blending mass ratio of VRDS vacuum residue oil to desolidified mixed feedstock oil is 50-70:30-50.

[0036] In some embodiments, the heating temperature is 50-60°C.

[0037] In some embodiments, the heavy oil compatibilizer is one or more of p-alkylaniline, dodecylbenzenesulfonic acid, span-80 and 1,2-propylene oxide, preferably a mixture of p-alkylaniline, dodecylbenzenesulfonic acid, span-80 and 1,2-propylene oxide in a mass ratio of 6-8:4-6:1-3:1-2;

[0038] The addition amount of the heavy oil compatibilizer is 200-300 ppm, which improves the compatibility of the blended marine fuel.

[0039] In some embodiments, the stirring time is 40 to 50 minutes.

[0040] In some specific embodiments, the method for blending and producing RMG180 marine fuel oil comprises the following steps:

[0041] (1) The deep drawing pressure of the actual boiling point distillation device is set to 50-200 Pa. The VRDS atmospheric residue oil is deep drawn by the actual boiling point distillation device. The distillation is terminated when the corresponding atmospheric pressure temperature is 490-550° C. The bottom oil obtained is VRDS vacuum residue oil. When the temperature in the kettle drops to 150° C., the actual boiling point distillation device is depressurized. At this time, an inhibitor is added to the bottom oil, stirred for 30 minutes, and poured into a stainless steel barrel for standby use;

[0042] (2) High-viscosity heavy catalytic oil slurry and diesel are mixed in a mass ratio of 1.0:0.5-2.0, heated to 80°C, kept at the constant temperature for 30 minutes, stirred for 20-30 minutes, and 500-1000 ppm of oil slurry sedimentation agent is added to the mixed raw oil. The mixture is first preliminarily mixed in a mixer, and then placed in a multifunctional constant temperature water bath with a water bath temperature of 80-90°C and ultrasonic waves turned on for 10-15 minutes;

[0043] (3) Turn off the ultrasonic wave, maintain the temperature at 80-90°C, and let it stand for 48-60 hours;

[0044] (4) extracting 95% of the mixed crude oil from the upper layer and placing it in a stainless steel barrel for later use;

[0045] (5) The blending components in steps (1) and (4) are heated to a fluid state, 50 to 70 parts by mass of VRDS vacuum residue oil and 30 to 50 parts by mass of mixed raw material oil are weighed and mixed, heated to 60 to 70° C., 200 to 300 ppm of heavy oil compatibilizer is added, and stirred at medium speed for 40 to 50 minutes until the mixture is uniformly mixed.

[0046] The present invention discloses a method for blending RMG180 marine fuel oil using high-viscosity heavy catalytic oil slurry and VRDS vacuum residue oil. The method removes solids from high-viscosity heavy catalytic oil slurry, and solves the problem of blending high-viscosity heavy oil slurry into low-sulfur marine fuel oil through treatment; VRDS atmospheric residue oil is subjected to vacuum distillation, and VRDS vacuum residue oil is used to blend and produce low-sulfur marine fuel oil, thereby realizing graded utilization of VRDS atmospheric residue oil, reducing the production cost of marine fuel oil, and improving the quality of catalytic cracking raw materials.

[0047] In a second aspect, the present invention provides a RMG180 marine fuel oil produced by the above method.

[0048] RMG180 marine fuel oil includes the following raw materials: vacuum residue, decatalytic slurry and diesel.

[0049] Beneficial effects:

[0050] (1) By mixing catalytic slurry with catalytic diesel and then desolidifying, the conventional thinking of desolidifying slurry before blending with marine fuel is broken. The blending of marine fuel is combined with desolidification of slurry, which realizes the removal of catalyst from high-viscosity heavy slurry and increases the blending ratio of catalytic slurry in low-sulfur marine fuel.

[0051] (2) The combined desolidification of ultrasound and sedimentation agent is used. The cavitation, mechanical and thermal effects of ultrasound are used to reduce the viscosity of the oil slurry and destroy the interaction between the oil slurry and catalyst dust. The synergistic effect of ultrasound and sedimentation agent is conducive to the full combination of sedimentation agent and oil slurry, thereby improving the desolidification efficiency of the oil slurry and shortening the desolidification time.

[0052] (3) After deep vacuum extraction, VRDS atmospheric residue is used to obtain kettle bottom oil, which is then blended with VRDS vacuum residue to produce low-sulfur marine fuel, thus achieving graded utilization of VRDS atmospheric residue, reducing the excess quality of marine fuel and improving economic benefits.

[0053] (4) The three blending component oils involved in the present invention have quite different properties and compositions. High-efficiency inhibitors and compatibilizers are developed to achieve good stability and compatibility of the blended marine fuel.

[0054] The present invention has been described in detail above, but the above embodiments are only illustrative in nature and are not intended to limit the present invention. In addition, this article is not limited by any theory described in the above prior art or invention content or the following examples. DETAILED DESCRIPTION

[0055] The present invention is further described below in conjunction with examples. It should be noted that the following examples are provided for illustrative purposes only and do not constitute a limitation on the scope of protection claimed for the present invention.

[0056] Unless otherwise specified, the raw materials, reagents, methods, etc. used in the examples are conventional raw materials, reagents, methods in the art.

[0057] VRDS atmospheric residue comes from the heavy oil hydrogenation workshop of the refinery of Sinopec Qilu Branch;

[0058] The catalytic slurry oil comes from the second catalytic workshop of the refinery of Sinopec Qilu Branch;

[0059] Catalytic diesel was sourced from the catalytic cracking plant of the refinery of Sinopec Qilu Branch;

[0060] The polymerization inhibitor is a mixture of dodecylbenzenesulfonic acid, N,N-dimethylamide and dodecylresorcinol in a mass ratio of 5:2:2;

[0061] The oil slurry settling agent is a mixture of polyvinylamine, polyacrylamide, formaldehyde and phenol in a mass ratio of 7:4:2:2;

[0062] The heavy oil compatibilizer is a mixture of p-alkylaniline, dodecylbenzenesulfonic acid, span-80 and 1,2-propylene oxide in a mass ratio of 7:5:2:1;

[0063] The real boiling point distillation apparatus is a SBD-VIII microcomputer-controlled real boiling point distillation apparatus developed and manufactured by Shenyang Shiboda Instrument Co., Ltd.

[0064] Example 1

[0065] Kinematic viscosity of VRDS atmospheric residue (50℃): 309.1mm 2 ·s -1 , density (20℃): 930.2kg·m -3 , sulfur content: 0.34%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 200pa, and the distillation is ended when the corresponding atmospheric temperature is 490℃. The obtained VRDS vacuum residue oil is the bottom oil of kettle at ≥490℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 200ppm.

[0066] Kinematic viscosity of catalytic oil slurry (50℃): 2030.4mm 2 ·s -1 , density (20℃): 1096.6kg·m -3 , sulfur content: 0.65%, Al+Si content: 352mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3mm 2 ·s -1 , density (20℃): 976.7kg·m -3 , sulfur content: 0.14%, closed cup flash point 92℃. Catalytic slurry and catalytic diesel are mixed in a mass ratio of 1.0:1.0, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 700ppm of slurry sedimentation agent is added to the mixed crude oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, and ultrasonic waves are turned on at 40kHz for 15min. Turn off the ultrasonic wave, stand at 90℃ for 54 hours, and extract 95% of the mixed crude oil in the upper layer for use.

[0067] Weigh 59 parts of VRDS vacuum residue oil and 41 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 300ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is uniformly mixed.

[0068] Example 2

[0069] Kinematic viscosity of VRDS atmospheric residue (50℃): 309.1mm 2·s -1 , density (20℃): 930.2kg·m -3 , sulfur content: 0.34%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 50pa, and the distillation is ended when the corresponding atmospheric temperature is 550℃. The obtained VRDS vacuum residue oil is the bottom oil of kettle at ≥550℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 300ppm.

[0070] Kinematic viscosity of catalytic oil slurry (50℃): 2030.4mm 2 ·s -1 , density (20℃): 1096.6kg·m -3 , sulfur content: 0.65%, Al+Si content: 352mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3mm 2 ·s -1 , density (20℃): 976.7kg·m -3 , sulfur content: 0.14%, closed cup flash point 92℃. Catalytic slurry and catalytic diesel are mixed in a mass ratio of 1.0:1.7, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 900ppm of slurry sedimentation agent is added to the mixed crude oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, and ultrasonic waves are turned on at 40kHz for 15min. Turn off the ultrasonic wave, stand at 90℃ for 48 hours, and extract 95% of the mixed crude oil in the upper layer for use.

[0071] Weigh 55 parts of VRDS vacuum residue oil and 45 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 260ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is evenly mixed.

[0072] Example 3

[0073] Kinematic viscosity of VRDS atmospheric residue (50℃): 297.7mm 2 ·s -1 , density (20℃): 931.7kg·m -3 , sulfur content: 0.32%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 150pa, and the distillation is ended when the corresponding atmospheric temperature is 500℃. The obtained VRDS vacuum residue oil is the bottom oil of the kettle at ≥500℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 220ppm.

[0074] Kinematic viscosity of catalytic oil slurry (50℃): 1432.1.mm2 ·s -1 , density (20℃): 1120.4kg·m -3 , sulfur content: 0.63%, Al+Si content: 289mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.1mm 2 ·s -1 , density (20℃): 972.6kg·m -3 , sulfur content: 0.11%, closed cup flash point 87℃. Catalytic slurry and catalytic diesel are mixed in a mass ratio of 1.0:0.6, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 800ppm of slurry sedimentation agent is added to the mixed raw oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, and ultrasonic waves are turned on at 40kHz for 15min. Turn off the ultrasonic wave, stand at 90℃ for 54 hours, and extract 95% of the mixed raw oil in the upper layer for use.

[0075] Weigh 65 parts of VRDS vacuum residue oil and 35 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 280ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is evenly mixed.

[0076] Example 4

[0077] Kinematic viscosity of VRDS atmospheric residue (50℃): 297.7mm 2 ·s -1 , density (20℃): 931.7kg·m -3 , sulfur content: 0.32%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 100pa, and the distillation is ended when the corresponding atmospheric temperature is 520℃. The obtained VRDS vacuum residue oil is the bottom oil of the kettle at ≥520℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 280ppm.

[0078] Kinematic viscosity of catalytic oil slurry (50℃): 1432.1.mm 2 ·s -1 , density (20℃): 1120.4kg·m -3 , sulfur content: 0.63%, Al+Si content: 289mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.1mm 2 ·s -1 , density (20℃): 972.6kg·m -3, sulfur content: 0.11%, closed cup flash point 87℃. Catalytic slurry and catalytic diesel are mixed in a mass ratio of 1.0:0.74, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 600ppm of slurry sedimentation agent is added to the mixed raw oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, and ultrasonic waves are turned on at 40kHz for 15min. Turn off the ultrasonic wave, stand at 90℃ for 54 hours, and extract 95% of the mixed raw oil in the upper layer for use.

[0079] Weigh 60 parts of VRDS vacuum residue oil and 40 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 240ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is evenly mixed.

[0080] Example 5

[0081] Kinematic viscosity of VRDS atmospheric residue (50℃): 297.7mm 2 ·s -1 , density (20℃): 931.7kg·m -3 , sulfur content: 0.32%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 150pa, and the distillation is ended when the corresponding atmospheric temperature is 500℃. The obtained VRDS vacuum residue oil is the bottom oil of the kettle at ≥500℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 220ppm.

[0082] Kinematic viscosity of catalytic oil slurry (50℃): 2030.4mm 2 ·s -1 , density (20℃): 1096.6kg·m -3 , sulfur content: 0.65%, Al+Si content: 352mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3mm 2 ·s -1 , density (20℃): 976.7kg·m -3 , sulfur content: 0.14%, closed cup flash point 92℃. Catalytic slurry and catalytic diesel are mixed in a mass ratio of 1.0:1.5, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 700ppm of slurry sedimentation agent is added to the mixed crude oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, and ultrasonic waves are turned on at 40kHz for 15min. Turn off the ultrasonic wave, stand at 90℃ for 54 hours, and extract 95% of the mixed crude oil in the upper layer for use.

[0083] Weigh 70 parts of VRDS vacuum residue oil and 30 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 300ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is evenly mixed.

[0084] Comparative Example 1

[0085] Kinematic viscosity of VRDS atmospheric residue (50℃): 309.1mm 2 ·s -1 , density (20℃): 930.2kg·m -3 , sulfur content: 0.34%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 200pa, and the distillation is ended when the corresponding atmospheric temperature is 490℃. The obtained VRDS vacuum residue oil is the bottom oil of kettle at ≥490℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 200ppm.

[0086] Kinematic viscosity of catalytic oil slurry (50℃): 2030.4mm 2 ·s -1 , density (20℃): 1096.6kg·m -3 , sulfur content: 0.65%, Al+Si content: 352mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3mm 2 ·s -1 , density (20℃): 976.7kg·m -3 , sulfur content: 0.14%, closed cup flash point 92℃. Add 700ppm of oil slurry sedimentation agent to the catalytic oil slurry, mix it in a mixer, put it in a 90℃ multifunctional constant temperature water bath, let it stand for 54 hours at 90℃, extract 95% of the upper layer of oil slurry, and mix and stir the oil slurry with diesel in a mass ratio of 1.0:1.0 to obtain mixed raw oil.

[0087] Weigh 59 parts of VRDS vacuum residue oil and 41 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 300ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is uniformly mixed.

[0088] Comparative Example 2

[0089] Kinematic viscosity of VRDS atmospheric residue (50℃): 309.1mm 2 ·s -1 , density (20℃): 930.2kg·m -3 , sulfur content: 0.34%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 50pa, and the distillation ends when the corresponding atmospheric pressure temperature is 550℃. The obtained VRDS vacuum residue oil is a kettle bottom oil ≥550℃.

[0090] Kinematic viscosity of catalytic oil slurry (50℃): 2030.4mm 2 ·s -1 , density (20℃): 1096.6kg·m -3 , sulfur content: 0.65%, Al+Si content: 352mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3mm 2 ·s -1 , density (20℃): 976.7kg·m -3 , sulfur content: 0.14%, closed cup flash point 92℃. Catalytic slurry and catalytic diesel are mixed in a mass ratio of 1.0:1.7, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 900ppm of slurry sedimentation agent is added to the mixed crude oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, and ultrasonic waves are turned on at 40kHz for 15min. Turn off the ultrasonic wave, stand at 90℃ for 48 hours, and extract 95% of the mixed crude oil in the upper layer for use.

[0091] Weigh 55 parts of VRDS vacuum residue oil and 45 parts of mixed raw material oil, mix them, heat them to 60-70°C, and stir them at 80 rpm until they are evenly mixed.

[0092] Comparative Example 3

[0093] Kinematic viscosity of VRDS atmospheric residue (50℃): 309.1mm 2 ·s -1 , density (20℃): 930.2kg·m -3 , sulfur content: 0.34%. VRDS atmospheric residue oil is deep drawn by a real boiling point distillation device, the deep drawing pressure is 200pa, and the distillation is ended when the corresponding atmospheric temperature is 490℃. The obtained VRDS vacuum residue oil is the bottom oil of kettle at ≥490℃. When the temperature in the kettle drops to 150℃, the pressure is released. At this time, the inhibitor is added to the bottom oil of the kettle and stirred for 30 minutes. The amount of inhibitor added to the VRDS vacuum residue oil is 200ppm.

[0094] Kinematic viscosity of catalytic oil slurry (50℃): 2030.4mm 2 ·s -1 , density (20℃): 1096.6kg·m -3 , sulfur content: 0.65%, Al+Si content: 352mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3mm 2 ·s -1 , density (20℃): 976.7kg·m -3, sulfur content: 0.14%, closed cup flash point 92℃. Catalytic slurry oil and catalytic diesel are mixed in a mass ratio of 1.0:1.0, heated to 80℃, kept constant temperature for 30min, stirred for 20-30min, 700ppm of slurry oil settling agent is added to the mixed raw oil, mixed preliminarily in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath, left to stand for 54 hours at 90℃, and 95% of the slurry oil in the upper layer is extracted for standby use.

[0095] Weigh 59 parts of VRDS vacuum residue oil and 41 parts of mixed raw material oil, mix them, heat them to 60-70°C, add 300ppm heavy oil compatibilizer, and stir at 80 rpm until the mixture is uniformly mixed.

[0096] According to the current national standard GB / T 17411-2015 for marine fuel oil, the main technical index requirements and test results of RMG180 marine fuel oil are shown in Table 1.

[0097] Table 1 Main results of blending marine fuel oil

[0098]

[0099] Through the above examples and test results, it can be seen that the kinematic viscosity, density, flash point, aluminum-silicon content and compatibility of the low-sulfur heavy marine fuel oil prepared in the present invention all meet the quality standards. Especially from the analysis results of kinematic viscosity, density and sulfur content, the quality surplus of the mixed marine fuel oil is small, and at the same time, it provides high-quality raw materials for the catalytic cracking device. The VRDS normal pressure residue oil grading effect is significant, which is conducive to improving economic benefits. In addition, in the preparation process of marine fuel oil, high viscosity heavy oil slurry is mixed and added, achieving high-value utilization of low-value-added products, and playing a role in reducing costs. It can be seen from Comparative Example 1 that the conventional method is used to desolidify the slurry, and after the sedimentation agent is added for sedimentation, the aluminum-silicon content of the upper 95% slurry blended with diesel and VRDS vacuum residue to blend the ship fuel exceeds the standard. It can be seen that the conventional sedimentation agent method for desolidifying the slurry is not suitable for high-viscosity heavy slurry; it can be seen from Comparative Example 2 that when the three oil products of VRDS vacuum residue, high-viscosity heavy slurry and diesel are directly blended, the compatibility of the ship fuel is unqualified due to the large differences in the composition of the three oil products. It can be seen from Comparative Example 3 that after the high-viscosity heavy slurry is mixed with diesel and the sedimentation agent is added, the slurry is desolidified without turning on the ultrasonic wave, and the aluminum-silicon content of the blended ship fuel is lower than that of Comparative Example 1, but still exceeds the index range.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features thereof may be replaced by equivalents, without departing from the spirit and essence of the claims of the present invention; and these modifications or replacements are still within the scope defined by the claims of the present invention.

Claims

1. A method for blending and producing RMG180 marine fuel oil, characterized in that: The following steps are involved: Preparation of VRDS vacuum residue: VRDS atmospheric residue is deep-drawn in a real boiling point distillation unit, and the distillation is terminated when the atmospheric pressure temperature is 490-550°C to obtain the bottom oil; Preparation of desolidified mixed crude oil: high viscosity heavy catalytic oil slurry is mixed with diesel, heated, kept constant temperature, and stirred; then oil slurry settling agent is added, first preliminarily mixed in a mixer, and then ultrasonically mixed and dispersed; heat-insulated and allowed to stand, and 95% of the mixed crude oil in the upper layer is extracted; Blending RMG180 marine fuel oil: Blend VRDS vacuum residue oil and desolidified mixed crude oil in a certain proportion, add heavy oil compatibilizer after heating and stir until the mixture is uniform to obtain RMG180 marine fuel oil.

2. The method according to claim 1, characterized in that The VRDS atmospheric residue has a kinematic viscosity of 200-400 mm at 50°C. 2 / s, density at 20℃ is 880~980kg / m 3 , sulfur content is less than 0.5%.

3. The method according to claim 1, characterized in that The deep drawing pressure of the real boiling point distillation device is 50~200Pa.

4. The method according to claim 1, characterized in that: After distillation, when the temperature in the kettle drops to 150°C, release the pressure, add 200-300 ppm of polymerization inhibitor to the bottom oil of the kettle, and stir for 30 minutes; Preferably, the polymerization inhibitor is one or more of dodecylbenzenesulfonic acid, N,N-dimethylamide and dodecylresorcinol.

5. The method according to claim 1, characterized in that The high viscosity heavy catalytic oil slurry has a density of 1000-1200 kg / m 3 , 50℃ kinematic viscosity is 1300~2300mm 2 / s, the total content of aluminum and silicon is 200-400 mg / kg; The diesel is one or more of catalytic diesel, ethylene diesel, and coking diesel, and has a density of 920-1020 kg / m at 20°C. 3 , 50℃ kinematic viscosity 1.0~10.0mm 2 / s, closed cup flash point greater than 65°C, preferably catalytic diesel.

6. The method according to claim 1, characterized in that The mixing mass ratio of high-viscosity heavy catalytic oil slurry to diesel is 1.0:0.5~2.

0.

7. The method according to claim 1, characterized in that The oil slurry settling agent is one or more of polyvinylamine, polyacrylamide, formaldehyde and phenol; The added amount of the oil slurry sedimentation agent is 500-1000ppm.

8. The method according to claim 1, characterized in that: The ultrasonic mixing temperature is 80-90° C., the ultrasonic frequency is 40-50 kHz, and the ultrasonic mixing time is 10-15 min.

9. The method according to claim 1, characterized in that: The blending mass ratio of VRDS vacuum residue oil and desolidified mixed raw oil is 50-70:30-50; Preferably, the heavy oil compatibilizer is one or more of p-alkylaniline, dodecylbenzenesulfonic acid, span-80 and 1,2-propylene oxide; The added amount of the heavy oil compatibilizer is 200-300 ppm.

10. A RMG180 marine fuel oil, characterized in that: The method is produced by any one of claims 1 to 9.

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