A method for blending production of rmg180 marine fuel oil and the produced rmg180 marine fuel oil

Abstract

The application 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 RMG180 marine fuel oil. The application solves the problem of blending high-viscosity heavy oil slurry into low-sulfur marine fuel by removing solid matters after mixing high-viscosity heavy catalytic oil slurry and catalytic diesel oil, realizes the hierarchical utilization of VRDS atmospheric residue oil, reduces the production cost of marine fuel, and improves the quality of catalytic cracking raw materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of RMG180 marine fuel oil production, and particularly relates to a method for producing RMG180 marine fuel oil by blending heavy distillate oil of VRDS atmospheric residue, post-catalytic oil slurry and diesel oil. BACKGROUND

[0002] The current marine fuel oil standard GB17411-2015 stipulates that when the ship sails in the general area of the sea, the sulfur content of heavy marine fuel oil should not exceed 0.5%, and at the same time should also meet the specific requirements of each port standard; measures to reduce ship pollutant emissions include using low-sulfur fuel oil, increasing ship aftertreatment devices, reducing ship speed, using alternative fuels, and establishing emission control zones, among which, using low-sulfur fuel oil is the most effective and simplest measure to reduce pollutant emissions.

[0003] Because sulfur is continuously enriched in the end product during crude oil refining, 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 route for producing residual marine fuel oil with a sulfur mass fraction of less than 0.5% mainly includes: (1) enterprises processing low-sulfur crude oil can directly produce or blend low-sulfur heavy marine fuel oil using low-sulfur residue oil of the atmospheric and vacuum distillation unit. Atmospheric residue can be directly produced; vacuum residue has high viscosity and needs to use devices such as visbreaking to reduce viscosity, or is blended with catalytic diesel oil and catalytic oil slurry to produce. Considering that low-sulfur crude oil is relatively high in price and limited in resources, it will increase the production cost of residual marine fuel oil. (2) Enterprises processing high-sulfur crude oil, the residue oil produced by the atmospheric and vacuum distillation unit cannot meet the requirements of being directly used as low-sulfur marine fuel oil, and the mature process is to rely on residue oil hydrogenation process and blend low-sulfur secondary processing residue oil to produce low-sulfur marine fuel oil, which is rich in resources, but has high desulfurization cost. Therefore, using low-value-added products as blending components to reduce 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 used to produce low-sulfur marine fuel, and VRDS constant residue is used as the main blending distillate oil, and the proportion of VRDS constant residue is more than 70%. But VRDS constant residue is the raw material of catalytic cracking unit, and the capacity of fixed bed residue hydrogenation unit in the refinery is matched with the capacity of catalytic cracking and other subsequent processing capacity. If too much VRDS constant residue is used to produce low-sulfur marine fuel, the processing load of catalytic cracking unit will be reduced, which will affect the output and benefit of finished oil. And there is a quality surplus phenomenon in density, viscosity and other aspects of low-sulfur heavy marine fuel produced by this scheme. Therefore, VRDS constant residue is separated into light and heavy fractions, and the light fraction is used as the raw material of catalytic cracking unit, and the heavy fraction is used to blend marine fuel, which not only improves the quality of catalytic raw material, but also reduces the quality surplus of marine fuel, which is beneficial to improve the overall benefit. In the process of blending marine fuel, catalytic slurry is the main low-value product to reduce the quality surplus and cost of marine fuel, but the catalytic slurry contains a large amount of aluminum silicate catalyst dust. If it is blended into low-sulfur marine fuel, it will cause the aluminum-silicon content of marine fuel to exceed the standard and cause engine wear. Therefore, the catalytic slurry must be de-dusted before it can be used to blend marine fuel. At present, many refining enterprises use de-dusted oil slurry to blend marine fuel, but catalytic slurry is a complex mixture with varying properties. Sometimes it has high viscosity, high density and difficulty in de-dusting. This part of inferior high-viscosity heavy oil slurry is generally used to produce petroleum coke, and its value has not been effectively utilized.

[0005] The difficulties of blending marine fuel with high-viscosity heavy catalytic oil slurry are as follows: (1) The catalytic slurry contains a large amount of catalyst residue, and the content of aluminum and silicon is high. If it is directly blended into low-sulfur marine fuel, it will cause engine wear, and must be de-dusted. (2) The density and viscosity of high-viscosity heavy catalytic oil slurry are large, and the flowability is poor. The catalyst dust is stably suspended in the catalytic oil slurry, which is difficult to remove from the oil slurry. Therefore, oil slurry de-dusting is the key step in the whole process of processing and treatment. Only when the catalytic oil slurry is effectively de-dusted, it can be used as a blending component oil for low-sulfur marine fuel. The existing oil slurry de-dusting technology is mostly suitable for catalytic oil slurry with medium and low viscosity, and is not suitable for high-viscosity heavy oil slurry.

[0006] The difficulties of blending marine fuel with VRDS vacuum residue are as follows: the properties of VRDS vacuum residue, diesel and catalytic oil slurry are quite different. Especially the distillation range of VRDS vacuum residue and diesel, the final boiling point of catalytic diesel is ≤400℃, and the initial boiling point of VRDS vacuum residue is ≥490℃. When the two oils are blended, the asphaltene in VRDS vacuum residue will aggregate. 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 low-sulfur marine fuel oil production method, which comprises the following steps: heating the catalytic oil slurry, filtering the small catalyst particles in the oil slurry through a precision filtering device, mixing the filtered oil slurry with hydrogen, heating the mixture, contacting the mixture with a residue oil hydrofining catalyst, a distillate oil hydrofining catalyst and a distillate oil hydrocracking catalyst, and reacting the hydrogenation catalyst mixture to obtain a reaction product, and then separating the oil and gas, fractionating the reaction product to obtain a tail oil fraction, and mixing the tail oil fraction with the vacuum residue in different proportions to obtain the finished product.

[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 consisting of a pre-filter and a fine filter, the pre-filter being a wedge-shaped metal-wound wire filter core with a filtering accuracy of 2-10 microns, and the fine filter being an asymmetric metal powder sintered filter core with an accuracy of 0.2-1.0 microns. When filtering high-viscous heavy catalytic oil slurry, the catalyst powder is wrapped in the heavy components of the catalytic oil slurry and is difficult to remove by filtering, and the heavy components of the catalytic oil slurry are also easily intercepted on the filter screen during the filtering process, resulting in poor filtering effect and loss of heavy components. SUMMARY

[0009] To solve the above problems, the VRDS atmospheric residue is cut at the actual boiling point in the present application, the heavy components are blended into the VRDS vacuum residue to produce marine fuel oil, and the light components can be used as catalytic cracking raw oil. The light catalytic raw material can improve the quality of the catalytic raw material, increase the yield of catalytic liquefied gas and gasoline, reduce the energy consumption of the catalytic device, and improve the efficiency of the device.

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

[0011] The second purpose of the present application is to provide a RMG180 marine fuel oil produced by the method.

[0012] In order to achieve the above purposes of the present application, the following technical solutions are adopted:

[0013] In the first aspect, the present application 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-pulled through an actual boiling point distillation device, and the distillation is ended when the atmospheric temperature is 490-550℃, and the obtained kettle bottom oil has an initial boiling point of the kettle bottom oil distillation range ≥490℃;

[0015] Preparation of the solid-removing mixed raw material oil: mix the high-viscosity heavy catalytic slurry with diesel oil, heat, keep the temperature constant, and stir; then add the slurry settling agent, preliminarily mix it in a mixer, and then disperse it by ultrasonic mixing; keep it at rest, and extract the mixed raw material oil in the upper 95% of the whole volume;

[0016] Blending of the RMG180 marine fuel oil: blend the VRDS vacuum residue and the solid-removing mixed raw material oil at a certain ratio, add the heavy oil compatibilizer after heating, and stir until the mixture is uniform to obtain the RMG180 marine fuel oil.

[0017] Preparation of the VRDS vacuum residue:

[0018] The 50℃ kinematic viscosity of the VRDS atmospheric residue is 200.0-400.0mm 2 / s, the 20℃ density is 880-980kg / m 3 , and the sulfur content is less than 0.5%.

[0019] In some embodiments, the deep-cutting pressure of the true boiling point distillation device is 50-200pa.

[0020] In some embodiments, when the temperature in the distillation kettle is reduced to 150℃, the pressure is released, at this time, 200-300ppm of the polymerization inhibitor is added to the oil at the bottom of the kettle, and stirred for 30min;

[0021] Preferably, the polymerization inhibitor is one or more of dodecyl benzene sulfonic acid, N,N-dimethylamide, and dodecyl resorcinol, and preferably is a mixture of dodecyl benzene sulfonic acid, N,N-dimethylamide, and dodecyl resorcinol at a mass ratio of 4-6:1-3:1-3.

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

[0023] Preparation of the solid-removing mixed raw material oil:

[0024] The high-viscosity heavy catalytic slurry has a 20℃ density of 1000-1200kg / m 3 , a 50℃ kinematic viscosity of 1300-2300mm 2 / s, and a total content of aluminum and silicon of 200-400mg / kg.

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

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

[0027] In some embodiments, the temperature is raised to 80-85℃, and kept constant for 20-30 min, and stirred for 20-30 min.

[0028] In some embodiments, the slurry oil 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 6-8:3-5:1-3:1-3;

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

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

[0031] The ultrasonic frequency and time should be within a matching range. Too high frequency and too long time will result in poor synergistic effect of the compounded settling agent on the solid removal, and too low frequency and too short time will result in the inability of the settling agent to fully combine with the catalyst dust in the slurry oil.

[0032] In some embodiments, the temperature for holding and standing is 80-90℃, and the standing time is 48-60 hours.

[0033] The main component of the catalyst dust is aluminum silicate. The solid removal effect and whether the aluminum and silicon contents of the blended RMG180 marine fuel oil meet the requirements are investigated by analyzing the silicon and aluminum contents.

[0034] The blended RMG180 marine fuel oil:

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

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

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

[0039] In some embodiments, the stirring time is 40-50 min.

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

[0041] (1) The deep-cut pressure of the true boiling point distillation device is set to 50-200 Pa, the VRDS atmospheric residue is deep-cut by the true boiling point distillation device, and the distillation is ended when the corresponding atmospheric temperature is 490-550 DEG C, the kettle bottom oil, i.e. the VRDS vacuum residue, is obtained, when the kettle temperature is reduced to 150 DEG C, the true boiling point distillation device is depressurized, at this time, the polymerization inhibitor is added to the kettle bottom oil, and stirred for 30 min, and poured into a stainless steel barrel for standby;

[0042] (2) The high-viscosity heavy catalytic slurry oil is mixed with diesel oil according to the mass ratio of 1.0:0.5-2.0, heated to 80 DEG C, kept at constant temperature for 30 min, and stirred for 20-30 min, 500-1000 ppm of slurry oil settling agent is added to the mixed raw oil, initially mixed by a mixer, and then placed in a multifunctional constant temperature water bath box, the water bath temperature is 80-90 DEG C, and the ultrasonic wave is turned on for 10-15 min;

[0043] (3) The ultrasonic wave is turned off, the temperature is maintained at 80-90 DEG C, and the mixture is kept still for 48-60 hours;

[0044] (4) The upper 95% of the mixed raw oil is extracted and placed in a stainless steel barrel for standby;

[0045] (5) The blending components in steps (1) and (4) are heated to a flowable state, the VRDS vacuum residue 50-70 parts and the mixed raw oil 30-50 parts are weighed and mixed, heated to 60-70 DEG C, 200-300 ppm of heavy oil compatibility agent is added, and stirred at medium speed for 40-50 min until the mixture is uniformly mixed.

[0046] The method for blending RMG180 marine fuel oil by using high-viscosity heavy catalytic slurry oil and VRDS vacuum residue. The method removes the solid from the high-viscosity heavy catalytic slurry oil, solves the problem of blending the high-viscosity heavy oil slurry into low-sulfur marine fuel, performs vacuum distillation on the VRDS atmospheric residue, uses the VRDS vacuum residue to blend and produce low-sulfur marine fuel, realizes the grading utilization of the VRDS atmospheric residue, reduces the production cost of the marine fuel, and improves the quality of the catalytic cracking raw material.

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

[0048] The RMG180 marine fuel oil comprises the following raw oils: vacuum residue, post-catalytic slurry and diesel oil.

[0049] Beneficial effects:

[0050] (1) By mixing the catalytic slurry with catalytic diesel and then removing the solid, the conventional idea of removing the solid from the slurry first and then blending the marine fuel is broken, the blending of the marine fuel and the slurry is combined, the catalyst in the high-viscosity heavy oil slurry is removed, and the blending ratio of the catalytic slurry in the low-sulfur marine fuel is improved.

[0051] (2) The solid is removed by combining ultrasonic and settling agent, the ultrasonic cavitation, mechanical action and thermal action are used to reduce the viscosity of the slurry, the action force between the slurry and the catalyst dust is broken, the ultrasonic and the settling agent have a synergistic effect, which is beneficial to the full combination of the settling agent and the slurry, the slurry solid removal efficiency is improved, and the solid removal time is shortened.

[0052] (3) The VRDS atmospheric residue is obtained by deep-cutting after pressure reduction, the VRDS vacuum residue is used to blend and produce low-sulfur marine fuel, the grading utilization of the VRDS atmospheric residue is realized, the quality of the marine fuel is reduced, and the economic benefit is improved.

[0053] (4) The three blending components of the present application have large differences in properties and composition, efficient polymerization inhibitors and compatibilizers are developed, and good stability and compatibility of the blended marine fuel are realized.

[0054] The present application has been described in detail in the foregoing, but the above-mentioned embodiments are only illustrative in nature and are not intended to limit the present application. In addition, the present application is not limited by any theory described in the foregoing prior art or the present application or the examples described below. DETAILED DESCRIPTION

[0055] The present application will be further described in conjunction with the examples, and it should be noted that the following examples are provided only for illustrative purposes and do not constitute a limitation on the scope of the present application.

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

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

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

[0059] The catalytic diesel comes from the catalytic cracking workshop of the refinery of Qilu Branch Company of SINOPEC;

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

[0061] The slurry settling agent is a mixture of polyethyleneamine, polyacrylamide, formaldehyde and phenol with 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 with a mass ratio of 7:5:2:1;

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

[0064] Example 1

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

[0066] The kinematic viscosity (50℃) of the FCC slurry oil is 20 30.4 mm 2 ·s -1 The density (20℃) is 1096.6 kg·m -3 The sulfur content is 0.65%, and the Al+Si content is 352 mg / kg; The kinematic viscosity (50℃) of the FCC diesel oil is 2.3 mm 2 ·s -1 The density (20℃) is 976.7 kg·m -3 The sulfur content is 0.14%, and the closed flash point is 92℃. The FCC slurry oil and the FCC diesel oil are mixed according to a mass ratio of 1.0:1.0, heated to 80℃, kept at the constant temperature for 30 min, stirred for 20-30 min, 700 ppm of the slurry oil settling agent is added to the mixed raw oil, preliminarily mixed by a mixer, then placed into a 90℃ multifunctional constant temperature water bath box, and the ultrasonic wave of 40 kHz is started for 15 min. The ultrasonic wave is turned off, and the mixture is statically placed for 54 hours at a temperature of 90℃, and the upper 95% of the mixed raw oil is extracted for standby.

[0067] 59 parts of the VRDS vacuum residue and 41 parts of the mixed raw oil are weighed and mixed, heated to 60-70℃, and 300 ppm of the heavy oil compatibilizer is added and stirred at 80 r / min until the mixture is uniform.

[0068] Example 2

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

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

[0071] The VRDS vacuum residue 55 parts and the mixed raw oil 45 parts are mixed, heated to 60-70℃, and 260 ppm of heavy oil compatibilizer is added, and stirred at 80 r / min until the mixture is uniform.

[0072] Example 3

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

[0074] The kinematic viscosity (50℃) of the FCC slurry oil is 1432.1 mm2 ·s -1 , density (20°C): 972.6 kg / m -3 , sulfur content: 0.11%, closed flash point 87°C. The FCC slurry oil and the FCC diesel were mixed in a mass ratio of 1.0:0.6, heated to 80°C, kept at constant temperature for 30 min, stirred for 20-30 min, and then 800 ppm of the slurry oil settling agent was added to the mixed feedstock oil. The mixture was preliminarily mixed in a mixer, and then placed in a 90°C multifunctional constant temperature water bath box. The ultrasonic wave of 40 kHz was turned on for 15 min. The ultrasonic wave was turned off, and the mixture was left to stand at 90°C for 54 h. The upper 95% of the mixed feedstock oil was extracted and reserved for use. 2 ·s -1 , density (20°C): 972.6 kg / m -3 , sulfur content: 0.11%, closed flash point 87°C. The FCC slurry oil and the FCC diesel were mixed in a mass ratio of 1.0:0.6, heated to 80°C, kept at constant temperature for 30 min, stirred for 20-30 min, and then 800 ppm of the slurry oil settling agent was added to the mixed feedstock oil. The mixture was preliminarily mixed in a mixer, and then placed in a 90°C multifunctional constant temperature water bath box. The ultrasonic wave of 40 kHz was turned on for 15 min. The ultrasonic wave was turned off, and the mixture was left to stand at 90°C for 54 h. The upper 95% of the mixed feedstock oil was extracted and reserved for use.

[0075] VRDS vacuum residue 65 parts, mixed feedstock oil 35 parts were weighed and mixed, heated to 60-70°C, and then 280 ppm of the heavy oil compatibilizer was added. The mixture was stirred at 80 rpm until it was uniformly mixed.

[0076] Example 4

[0077] The kinematic viscosity (50°C) of the VRDS atmospheric residue was 297.7 mm 2 ·s -1 , density (20°C): 972.6 kg / m -3 , sulfur content: 0.11%, closed flash point 87°C. The FCC slurry oil and the FCC diesel were mixed in a mass ratio of 1.0:0.6, heated to 80°C, kept at constant temperature for 30 min, stirred for 20-30 min, and then 800 ppm of the slurry oil settling agent was added to the mixed feedstock oil. The mixture was preliminarily mixed in a mixer, and then placed in a 90°C multifunctional constant temperature water bath box. The ultrasonic wave of 40 kHz was turned on for 15 min. The ultrasonic wave was turned off, and the mixture was left to stand at 90°C for 54 h. The upper 95% of the mixed feedstock oil was extracted and reserved for use.

[0078] The kinematic viscosity (50°C) of the FCC slurry oil was 1432.1 mm 2 ·s -1 , density (20°C): 972.6 kg / m -3 , sulfur content: 0.11%, closed flash point 87°C. The FCC slurry oil and the FCC diesel were mixed in a mass ratio of 1.0:0.6, heated to 80°C, kept at constant temperature for 30 min, stirred for 20-30 min, and then 800 ppm of the slurry oil settling agent was added to the mixed feedstock oil. The mixture was preliminarily mixed in a mixer, and then placed in a 90°C multifunctional constant temperature water bath box. The ultrasonic wave of 40 kHz was turned on for 15 min. The ultrasonic wave was turned off, and the mixture was left to stand at 90°C for 54 h. The upper 95% of the mixed feedstock oil was extracted and reserved for use. 2 ·s -1 , density (20°C): 972.6 kg / m -3, sulfur content: 0.11%, closed flash point 87℃. The FCC slurry oil and the FCC diesel oil were mixed in a mass ratio of 1.0:0.74, heated to 80℃, kept constant for 30 min, stirred for 20-30 min, and then 600 ppm of the slurry oil settling agent was added to the mixed raw oil. The mixture was preliminarily mixed in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath. The ultrasonic wave of 40 kHz was turned on for 15 min. The ultrasonic wave was turned off, and the mixture was left to stand for 54 h at a temperature of 90℃. The upper 95% of the mixed raw oil was extracted and reserved.

[0079] VRDS vacuum residue 60 parts and the mixed raw oil 40 parts were weighed and mixed, heated to 60-70℃, and then 240 ppm of the heavy oil compatibilizer was added. The mixture was stirred at 80 rpm until it was uniformly mixed.

[0080] Example 5

[0081] The kinematic viscosity (50℃) of the VRDS atmospheric residue was 297.7 mm 2 ·s -1 The density (20℃) was 931.7 kg·m -3 The sulfur content was 0.32%. The VRDS atmospheric residue was deeply distilled by a true boiling point distillation device. The distillation was ended when the deep distillation pressure was 150 pa, and the corresponding atmospheric temperature was 500℃. The VRDS vacuum residue obtained was the kettle bottom oil with a temperature of ≥500℃. When the temperature in the kettle was reduced to 150℃, the pressure was released. At this time, the polymerization inhibitor was added to the kettle bottom oil, and stirred for 30 min. The amount of the polymerization inhibitor added to the VRDS vacuum residue was 220 ppm.

[0082] The kinematic viscosity (50℃) of the FCC slurry oil was 2030.4 mm 2 ·s -1 The density (20℃) was 1096.6 kg·m -3 The sulfur content was 0.65%, and the Al+Si content was 352 mg / kg. The kinematic viscosity (50℃) of the FCC diesel oil was 2.3 mm 2 ·s -1 The density (20℃) was 976.7 kg·m -3 The sulfur content was 0.14%, and the closed flash point was 92℃. The FCC slurry oil and the FCC diesel oil were mixed in a mass ratio of 1.0:1.5, heated to 80℃, kept constant for 30 min, stirred for 20-30 min, and then 700 ppm of the slurry oil settling agent was added to the mixed raw oil. The mixture was preliminarily mixed in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath. The ultrasonic wave of 40 kHz was turned on for 15 min. The ultrasonic wave was turned off, and the mixture was left to stand for 54 h at a temperature of 90℃. The upper 95% of the mixed raw oil was extracted and reserved.

[0083] Take VRDS vacuum residue 70 parts, mixed feed oil 30 parts mixed, heated to 60-70℃, add 300ppm heavy oil compatibilizer, 80r / min stirring to mix evenly.

[0084] Comparative Example 1

[0085] Kinematic viscosity (50℃) of VRDS atmospheric residue: 309.1mm 2 ·s -1 Density (20℃): 930.2kg·m -3 Sulfur content: 0.34%. The VRDS atmospheric residue 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 VRDS vacuum residue obtained is ≥490℃ still bottom oil, when the temperature in the kettle is reduced to 150℃, the pressure is released, at this time, the polymerization inhibitor is added to the still bottom oil, and stirred for 30min, the addition amount of the polymerization inhibitor in the VRDS vacuum residue is 200ppm.

[0086] Kinematic viscosity (50℃) of FCC slurry: 2030.4mm 2 ·s -1 Density (20℃): 1096.6kg·m -3 Sulfur content: 0.65%, Al+Si content: 352mg / kg; Kinematic viscosity (50℃) of FCC diesel oil: 2.3mm 2 ·s -1 Density (20℃): 976.7kg·m -3 Sulfur content: 0.14%, closed flash point 92℃. The FCC slurry is mixed by adding slurry settling agent 700ppm, first mixed by a mixer, then put into a 90℃ multifunctional constant temperature water bath box, and placed for 54 hours under the condition of temperature 90℃, the upper 95% of the oil slurry is extracted, and the oil slurry after removal is mixed with diesel oil in a mass ratio of 1.0:1.0, and stirred evenly to obtain the mixed feed oil.

[0087] Take VRDS vacuum residue 59 parts, mixed feed oil 41 parts mixed, heated to 60-70℃, add 300ppm heavy oil compatibilizer, 80r / min stirring to mix evenly.

[0088] Comparative Example 2

[0089] Kinematic viscosity (50℃) of VRDS atmospheric residue: 309.1mm 2 ·s -1 Density (20℃): 930.2kg·m -3 Sulfur content: 0.34%. The VRDS atmospheric residue 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℃, and the VRDS vacuum residue obtained is ≥550℃ still bottom oil.

[0090] Kinematic viscosity of FCC slurry oil (50℃): 20-30.4 mm 2 · s -1 Density (20℃): 1096.6 kg·m -3 Sulfur content: 0.65%, Al+Si content: 352 mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3 mm 2 · s -1 Density (20℃): 976.7 kg·m -3 Sulfur content: 0.14%, closed flash point 92℃. The FCC slurry oil and catalytic diesel are mixed in a mass ratio of 1.0:1.7, heated to 80℃, kept at constant temperature for 30 min, stirred for 20-30 min, and then 900 ppm of slurry settling agent is added to the mixed raw oil. The mixture is first mixed in a mixer, then placed in a 90℃ multifunctional constant temperature water bath, and the ultrasonic wave of 40 kHz is turned on for 15 min. The ultrasonic wave is turned off, and the mixture is left to stand at a temperature of 90℃ for 48 hours. The upper 95% of the mixed raw oil is extracted and reserved for use.

[0091] VRDS vacuum residue 55 parts, mixed raw oil 45 parts are weighed and mixed, heated to 60-70℃, and stirred at 80 rpm until uniform.

[0092] Comparative Example 3

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

[0094] Kinematic viscosity of FCC slurry oil (50℃): 20-30.4 mm 2 · s -1 Density (20℃): 1096.6 kg·m -3 Sulfur content: 0.65%, Al+Si content: 352 mg / kg; kinematic viscosity of catalytic diesel (50℃): 2.3 mm 2 · s -1 Density (20℃): 976.7 kg·m -3Sulfur content: 0.14%, closed flash point 92℃. The catalytic slurry oil and the catalytic diesel oil are mixed according to the mass ratio 1.0:1.0, heated to 80℃, kept constant for 30 min, stirred for 20-30 min, 700 ppm of the slurry oil settling agent is added to the mixed raw oil, and then the mixture is preliminarily mixed in a mixer, and then placed in a 90℃ multifunctional constant temperature water bath box, and kept still for 54 hours at the temperature of 90℃, and the upper 95% of the slurry oil is extracted for standby.

[0095] The VRDS vacuum residue 59 parts and the mixed raw oil 41 parts are weighed and mixed, heated to 60-70℃, and 300 ppm of the heavy oil compatibilizer is added, and stirred at 80 rpm until mixed uniformly.

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

[0097] Table 1 Main results of the blended marine fuel oil

[0098]

[0099] It can be seen from the above examples and test results that the kinematic viscosity, density, flash point, aluminum-silicon content and compatibility of the low-sulfur heavy marine fuel oil prepared by the present application all meet the quality standards. Especially from the analysis results of kinematic viscosity, density and sulfur content, the quality of the blended marine fuel oil has a small surplus, and at the same time, the catalytic cracking device is provided with high-quality raw materials, the grading utilization effect of the VRDS atmospheric residue is remarkable, and the economic benefits are improved. And in the preparation process of the marine fuel oil, the high-viscosity heavy oil slurry is blended and added, the high-value utilization of low-value products is realized, and the cost is reduced. It can be seen from Comparative Example 1 that after the oil slurry is settled by adding the settling agent, the aluminum-silicon content of the upper 95% of the slurry oil blended with diesel oil and VRDS vacuum residue exceeds the standard, and therefore, the conventional settling agent method is not suitable for high-viscosity heavy oil slurry. It can be seen from Comparative Example 2 that when the VRDS vacuum residue, high-viscosity heavy oil slurry and diesel oil are directly blended, the compatibility of the marine fuel is unqualified due to the large difference between the three oil products. It can be seen from Comparative Example 3 that after the high-viscosity heavy oil slurry is mixed with diesel oil and the settling agent is added, the aluminum-silicon content of the blended marine 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 application, but not limit the present application. Although the present application is described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced equivalently without departing from the spirit and essence of the present application defined in the claims of the present application.

Claims

1. A method of blending production of RMG 180 marine fuel oil, characterized by, The method comprises the following steps: Preparation of VRDS vacuum residue: deep-cut of VRDS atmospheric residue by a true boiling point distillation device, and distillation is ended when the atmospheric temperature is 490-550 DEG C, and the obtained still bottom oil is obtained; Preparation of desolidification mixed raw oil: mixing of high-viscosity heavy catalytic oil slurry and diesel oil, heating, constant temperature, stirring, then adding oil slurry settling agent, preliminary mixing by a mixer, then ultrasonic mixing and dispersion, ultrasonic mixing temperature is 80-90 DEG C, ultrasonic frequency is 40-50 kHz, ultrasonic mixing time is 10-15 min; heat preservation and standing, and extraction of 95% of the upper mixed raw oil; Blending of RMG180 marine fuel oil: blending of VRDS vacuum residue and desolidification mixed raw oil in a mass ratio of 50-70:30-50, after heating, adding heavy oil compatibilizer and stirring until uniform, to obtain RMG180 marine fuel oil, the heavy oil compatibilizer is a mixture of p-alkyl aniline, dodecyl benzene sulfonic acid, span-80 and 1,2-epoxypropane; the addition amount of the heavy oil compatibilizer is 200-300 ppm.

2. The method of claim 1, wherein, The VRDS atmospheric residue has a kinematic viscosity at 50°C of 200 to 400 mm 2 / s, a density at 20°C of 880 to 980 kg / m 3 and a sulphur content of less than 0.5%.

3. The method of claim 1, wherein, The deep-cut pressure of the true boiling point distillation device is 50-200 pa.

4. The method of claim 1, wherein, When the temperature in the distillation kettle is reduced to 150 DEG C, pressure relief is performed, at this time, 200-300 ppm of polymerization inhibitor is added to the still bottom oil, and stirring is performed for 30 min; The polymerization inhibitor is one or more of dodecyl benzene sulfonic acid, N,N-dimethylamide and dodecyl resorcinol.

5. The method of claim 1, wherein, The high-viscosity heavy catalytic slurry has a 20℃ density of 1000-1200 kg / m 3 , a 50℃ kinematic viscosity of 1300-2300 mm 2 / s, and a total content of aluminum and silicon of 200-400 mg / kg. The diesel is one or several of catalytic diesel, ethylene diesel and coking diesel, with density of 920-1020 kg / m 3 at 20℃, kinematic viscosity of 1.0-10.0 mm 2 / s at 50℃, and closed flash point greater than 65℃.

6. The method of claim 1, wherein, The mixing mass ratio of high-viscosity heavy catalytic oil slurry and diesel oil is 1.0:0.5-2.

0.

7. The method of claim 1, wherein, The oil slurry settling agent is one or more of polyvinylamine, polyacrylamide, formaldehyde and phenol; The addition amount of the oil slurry settling agent is 500-1000 ppm.

8. A RMG 180 marine fuel oil characterized in that, The method is produced by any one of claims 1-7.

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