Low-carbon lubricating oil refining system and process

Abstract

The low-carbon type lubricating oil refining system comprises a feeding module, a refining module and a heating module, the feeding module is used for receiving raw oil and hydrogen, the heating module comprises a heat exchanger and a heater, and the heater is used for conducting shock wave heating on a heat exchange medium; the tube pass of the heat exchanger is used for allowing raw oil to pass through, the shell pass of the heat exchanger is used for allowing a heated heat exchange medium to pass through, the refining module comprises a reactor, a high-pressure separator and a low-pressure separator which are sequentially connected, the reactor is used for catalyzing the raw oil to react with hydrogen, and the high-pressure separator is used for separating redundant hydrogen; the low-pressure separator is used for separating gaseous hydrocarbon and refined oil, in the system, a shock wave heating principle is adopted in the preheating process of raw oil, chemical changes are not involved, carbon dioxide or sulfide is not generated, and environmental protection is facilitated.

Description

Technical Field

[0001] The present application belongs to the field of petrochemical technology, and specifically relates to a low-carbon lubricating oil refining system and process. Background Art

[0002] Lubricating oil refining is to change the components in the raw oil, so that the ideal components of isoparaffins and monocyclic cycloalkanes with long alkyl side chains are increased, and the non-ideal components such as condensed aromatics and condensed cycloalkanes are reduced. The generally used processes include ketone benzene dewaxing, solvent (furfural or phenol) refining, and clay refining. The above processes all need to be preheated before the raw oil reacts. In the prior art, the heating of the raw oil usually adopts the method of thermal radiation. The raw oil passes through the furnace tube of the heating furnace, and the combustible gas is continuously introduced into the radiation chamber of the heating furnace. The thermal radiation generated by the gas combustion continuously flushes the furnace tube to reach the purpose of heating the raw oil, but a large amount of carbon dioxide and part of the sulfide will be produced during the combustion process, which is not conducive to environmental protection. Summary of the invention

[0003] In view of the above-mentioned defects or shortcomings, the present application provides a low-carbon lubricating oil refining system and process, aiming to solve the technical problem of carbon dioxide and sulfide emissions caused by the existing lubricating oil refining system based on combustion heating.

[0004] To achieve the above-mentioned purpose, the present application provides a low-carbon lubricating oil refining system, comprising a feed module, a refining module, and a heating module; the feed module is used to receive crude oil and hydrogen; the heating module comprises a heat exchanger and a heater, the heater is used to perform shock wave heating on the heat exchange medium, the tube side of the heat exchanger is used to allow the lubricating oil to pass through, and the shell side of the heat exchanger is used to allow the heated heat exchange medium to pass through; the refining module comprises a reactor, a high-pressure separator, and a low-pressure separator connected in sequence, the reactor is used to catalyze the reaction between crude oil and hydrogen, the high-pressure separator is used to separate excess hydrogen, and the low-pressure separator is used to separate gaseous hydrocarbons and refined oil.

[0005] In an embodiment of the present application, the feed module includes a booster pump, a first buffer tank and a first mixer. The booster pump and the first mixer correspond to the inlet and outlet of the communicating pipe, and the first buffer tank is directly connected to the first mixer.

[0006] In an embodiment of the present application, the feed module further includes a second buffer tank, the inlet of the second buffer tank is connected to the high-pressure separator, and the outlet is connected to the first mixer. The hydrogen separated by the high-pressure separator enters the first mixer through the second buffer tank and continues to circulate.

[0007] In an embodiment of the present application, the heating module further includes a second mixer, there are multiple heaters and they are all connected to the second mixer one by one, and the second mixer is used to collect the heat exchange medium discharged from the multiple heaters and introduce it into the shell side of the heat exchanger.

[0008] In an embodiment of the present application, the heating module further includes a circulation device, which is used to reintroduce the heat exchange medium discharged from the heat exchanger into the heater.

[0009] In an embodiment of the present application, the heater includes an outer shell, a first fixed blade grid, a rotating blade grid, a second fixed blade grid and a rotor. The outer shell forms a shock wave heating channel. The cross-section of the shock wave heating channel is annular. The first fixed blade grid, the rotating blade grid and the second fixed blade grid are sequentially arranged in the shock wave heating channel from front to back. The rotor is arranged on the outer shell to drive the rotating blade grid to rotate in the shock wave heating channel.

[0010] In an embodiment of the present application, the heater also includes a plurality of partitions arranged in the shock wave heating channel, the plurality of partitions are used to separate a plurality of heating spaces, each heating space is provided with a plurality of first fixed blades for forming a first fixed blade grid, and a plurality of second fixed blades for forming a second fixed blade grid.

[0011] In the embodiment of the present application, both the first stationary blade and the second stationary blade have a curved streamline profile.

[0012] In an embodiment of the present application, the installation angle of the first fixed blade is between 35° and 75°, the inlet angle of the first fixed blade is between 0° and 45°, and the outlet angle of the first fixed blade is between 35° and 75°; the installation angle of the second fixed blade is between 45° and 85°, the inlet angle of the second fixed blade is between 25° and 65°, and the outlet angle of the second fixed blade is between 25° and 65°.

[0013] In the embodiment of the present application, the rotating blade grid includes a plurality of rotating blades, and each rotating blade has a curved profile toward its rotation direction.

[0014] In the embodiment of the present application, the installation angle of the rotating blade is between 10° and 80°, the inlet angle of the rotating blade is between 35° and 75°, and the outlet angle of the rotating blade is between 35° and 75°.

[0015] To achieve the above purpose, the present application also provides a low-carbon lubricating oil refining process, comprising:

[0016] S1: shock wave heating of the heat exchange medium and introduction into the shell side of the heat exchanger;

[0017] S2: The crude oil is pressurized by a booster pump and enters the tube side of the heat exchanger, where it is mixed with hydrogen after heat exchange with the heat exchange medium;

[0018] S3: Hydrofining the crude oil in the reactor;

[0019] S4: separating hydrogen and a first liquid phase stream in a high-pressure separator;

[0020] S5: Separating the first liquid phase stream into a first gas phase stream and a second liquid phase stream in a low-pressure separator.

[0021] In the embodiment of the present application, step S4 also includes: remixing the separated hydrogen with the feedstock oil.

[0022] In the embodiment of the present application, the temperature of the heated heat exchange medium is between 600-1200°C.

[0023] In the embodiment of the present application, the temperature of the feedstock oil after heat exchange is between 180-280°C.

[0024] Through the above technical solution, the low-carbon lubricating oil refining system provided in the embodiment of the present application has the following beneficial effects:

[0025] When using the above-mentioned low-carbon lubricating oil refining system, since the preheating process of the crude oil adopts the principle of shock wave heating, the heat exchange medium in the heater is decelerated from sonic or supersonic speed to subsonic speed. In this process, the kinetic energy of the heat exchange medium is converted into thermal energy. Compared with the existing technology using fuel combustion, this process does not involve chemical changes, does not produce carbon dioxide or sulfide, and is beneficial to environmental protection. The heated crude oil is mixed with hydrogen and enters the reactor for reaction. The reacted materials are separated into hydrogen and gaseous hydrocarbons in turn through high-pressure separators and low-pressure separators. The refined oil after separation is finally obtained through the fractionation system to obtain qualified lubricating oil.

[0026] Other features and advantages of the present application will be described in detail in the subsequent specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide an understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0028] Figure 1 is a schematic diagram of a low-carbon lubricating oil refining system according to an embodiment of the present application;

[0029] Figure 2 is a schematic cross-sectional view of a heater in a horizontal direction according to an embodiment of the present application;

[0030] Figure 3 is a front schematic diagram of a heater according to an embodiment of the present application;

[0031] Figure 4 is a schematic diagram of a blade at a certain location in a shock wave heating channel according to an embodiment of the present application;

[0032] Figure 5It is a flow chart of a low-carbon lubricating oil refining process according to one embodiment of the present application.

[0033] Description of Reference Numerals

[0034] 10 Reactor 21 High-pressure separator

[0035] 22 Low pressure separator 31 Booster pump

[0036] 32 First buffer tank 33 Second buffer tank

[0037] 40 heater 41 outer shell

[0038] 42 First fixed blade 43 Rotating blade

[0039] 44 Second fixed blade cascade 45 Shock wave heating channel

[0040] 50 heat exchanger 61 first mixer

[0041] 62 Second mixer 70 Cooler DETAILED DESCRIPTION

[0042] The specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0043] The low-carbon lubricating oil refining system and process of the present application will be described below with reference to the accompanying drawings.

[0044] The present application provides a novel low-carbon lubricating oil refining system. Figure 1 As shown, in a specific embodiment, the low-carbon lubricating oil refining system includes a feed module, a refining module, and a heating module.

[0045] The feed module is used to receive crude oil and hydrogen; the heating module includes a heat exchanger 50 and a heater 40, the heater 40 is used to perform shock wave heating on the heat exchange medium, the tube side of the heat exchanger 50 is used to allow lubricating oil to pass through, and the shell side of the heat exchanger 50 is used to allow the heated heat exchange medium to pass through; the refining module includes a reactor 10, a high-pressure separator 21 and a low-pressure separator 22 connected in sequence, the reactor 10 is used to catalyze the reaction between crude oil and hydrogen, the high-pressure separator 21 is used to separate excess hydrogen, and the low-pressure separator 22 is used to separate gaseous hydrocarbons and refined oil.

[0046] When using the above-mentioned low-carbon lubricating oil refining system, since the preheating process of the crude oil adopts the principle of shock wave heating, in the heater 40, the heat exchange medium is decelerated from the sonic speed or supersonic speed to the subsonic speed. In this process, the kinetic energy of the heat exchange medium is converted into thermal energy. Compared with the prior art using the fuel combustion method, this process does not involve chemical changes, does not produce carbon dioxide or sulfide, and is beneficial to environmental protection. The heated crude oil is mixed with hydrogen and enters the reactor 10 for reaction. The reacted materials are separated into hydrogen and gaseous hydrocarbons in turn by the high-pressure separator 21 and the low-pressure separator 22. The refined oil after separation is finally obtained by the fractionation system to obtain qualified lubricating oil.

[0047] It should be noted that in the present application, the heater 40 utilizes the principle of shock wave heating. Shock wave is a gas dynamic phenomenon. For gas flowing at the speed of sound or supersonic speed, its speed will be faster than the conduction of its pressure, thereby superimposing to form waves, and when the rear gas passes through these waves, compression waves or expansion waves will be formed. When the gas in the sonic or supersonic state encounters an obstacle, its compression waves will be superimposed to form a shock wave, which can cause the gas temperature to rise sharply and the speed to drop. In essence, part of the kinetic energy of the gas is converted into internal energy.

[0048] like Figure 1 As shown, in the embodiment of the present application, the feed module includes a booster pump 31, a first buffer tank 32 and a first mixer 61. The booster pump 31 and the first mixer 61 correspond to the inlet and outlet of the connected pipe side, and the first buffer tank 32 is directly connected to the first mixer 61. The raw oil enters the pipe side of the heat exchanger 50 after being pressurized by the booster pump 31. The buffer tank is used to buffer the input hydrogen to make the system more stable. The first mixer 61 is used to mix the raw oil and hydrogen, and also has the function of adjusting the flow rate, so that the mixture of the raw oil and hydrogen flows into the reactor 10 at a preset speed.

[0049] like Figure 1 As shown, in the embodiment of the present application, the feed module also includes a second buffer tank 33, the inlet of the second buffer tank 33 is connected to the high-pressure separator 21, and the outlet is connected to the first mixer 61. The hydrogen separated by the high-pressure separator 21 enters the first mixer 61 through the second buffer tank 33 and continues to circulate to improve the utilization rate of the hydrogen. The second buffer tank 33 buffers the hydrogen separated by the high-pressure separator 21 to make the hydrogen circulation process more stable.

[0050] In the embodiment of the present application, the heating module further includes a second mixer 62. The number of heaters 40 is multiple and all are connected to the second mixer 62 one by one. The second mixer 62 is used to collect the heat exchange medium discharged from the multiple heaters 40 and introduce it into the shell side of the heat exchanger 50. The present application adopts a combined heating method of multiple heaters 40, so a single heater 40 can be miniaturized to facilitate its installation. When the heating temperature of the crude oil needs to be adjusted, only some of the heaters 40 need to be turned on or off to effectively control the temperature within a certain range. The second mixer 62 mixes the heat exchange medium discharged from the multiple heaters 40 and guides it to the heat exchange chamber at the same rate, so that the airflow in the heat exchange chamber is more stable.

[0051] In the embodiment of the present application, the heating module further includes a circulation device, which is used to reintroduce the heat exchange medium discharged from the heat exchanger 50 into the heater 40. Through the circulation device, the low-carbon lubricating oil refining system can recover and utilize heat energy to the maximum extent, and the heat exchange medium discharged from the heat exchange chamber is reintroduced into the heater 40 through the circulation device, so that it participates in the heating process again, thereby reducing energy waste and heat loss, and improving the energy utilization efficiency of the device. This recycling design helps to save energy and reduce carbon emissions, and is in line with the principle of low-carbon environmental protection.

[0052] Specifically, see Figure 1 The lubricating oil refining heating system also includes a cooler 70 , which is disposed between the reactor 10 and the high-pressure separator 21 . The reaction product is cooled to a specified temperature by the cooler 70 and then flows into the high-pressure separator 21 .

[0053] like Figure 2 As shown, in the embodiment of the present application, the heater 40 includes an outer shell 41, a first fixed blade cascade 42, a rotating blade cascade 43, a second fixed blade cascade 44 and a rotor. The outer shell 41 is formed with a shock wave heating channel 45. The cross section of the shock wave heating channel 45 is annular. The first fixed blade cascade 42, the rotating blade cascade 43, and the second fixed blade cascade 44 are sequentially arranged in the shock wave heating channel 45 from front to back. The rotor is arranged on the outer shell 41 to drive the rotating blade cascade 43 to rotate in the shock wave heating channel 45. With the rotation of the rotating blade cascade 43, the heat exchange medium enters from the inlet of the first fixed blade cascade 42 at a subsonic speed, and is accelerated to a sonic speed or a supersonic speed by the rotating blade cascade 43, and then impacts the second fixed blade cascade 44. In the process of impacting the second fixed blade cascade 44, part of the kinetic energy of the heat exchange medium is converted into heat energy, and then flows out along the second fixed blade cascade 44. The rotor is driven by electric energy, so that the heat exchange medium first obtains kinetic energy in the heater 40 and then converts the kinetic energy into thermal energy. The source of electric energy can be clean energy such as wind energy, hydrogen energy, nuclear energy, etc., which is more low-carbon and environmentally friendly.

[0054] Specifically, the relative spacing distance between the first fixed blade cascade 42 and the second fixed blade cascade 44 is adjustable. The relative spacing between the first fixed blade cascade 42 and the second fixed blade cascade 44 can be specifically set according to the speed of the heat exchange medium to meet the need for accelerating the heat exchange medium. Further, the first fixed blade cascade 42 and the second fixed blade cascade 44 constitute an air duct for the flow of the heat exchange medium. At the first fixed blade cascade 42, the air duct is set in a reduced manner. When the heat exchange medium passes through the first fixed blade, it is compressed by the air duct for initial acceleration, and then further accelerated to the speed of sound or supersonic speed under the high-speed rotation of the rotating blade cascade 43.

[0055] In the embodiment of the present application, the heater 40 further includes a plurality of partitions disposed in the shock wave heating channel 45, the plurality of partitions being used to separate a plurality of heating spaces, each of which is provided with a plurality of first fixed blades for constituting the first fixed blade grid 42, and a plurality of second fixed blades for constituting the second fixed blade grid 44. Although the heat exchange medium can achieve the purpose of heating after impacting the second fixed blade, the temperature increase is limited. In order to meet the actual needs of lubricating oil refining, a plurality of heating spaces are separated by providing a plurality of partitions, so that the heat exchange medium passes through the plurality of heating spaces in the shock wave heating channel 45 in sequence. Through this multi-layer design, the heat exchange medium moves spirally along the shock wave heating channel 45 under the drive of the rotating blades, and repeatedly passes through the first fixed blade grid 42, the rotating blade grid 43, and the second fixed blade grid 44, thereby generating shock waves multiple times and gradually increasing the temperature until the requirement is met.

[0056] Specifically, refer to Figure 2 and Figure 3 The heater 40 is arranged in a circular shape as a whole, the shock wave heating channel surrounds the central axis of the heater 40, the first fixed blade 42, the rotating blade 43 and the second fixed blade 44 also surround the central axis, and the heater 40 also includes a rotor arranged through the central axis, and the rotor drives the rotating blade 43 to rotate around the central axis. The heat exchange medium flows in from the inlet of the outer shell 41, flows along the first fixed blade in the first heating space to the rotating blade 43, and is accelerated from subsonic speed to sonic speed or supersonic speed through the rotating blade 43, and then impacts the second fixed blade in the heating space and slows down to subsonic speed. In this process, part of the kinetic energy of the heat exchange medium is converted into internal energy, completing the first heating. The heat exchange medium after deceleration enters the bladeless area in the next heating space along the second fixed blade, and then flows along the annular bladeless area to the first fixed blade, and performs the second heating according to the above steps. Repeat the above process, the heat exchange medium enters from the inlet of the outer shell 41, and spirally moves along the shock wave heating channel 45 to the outlet of the outer shell 41. In this moving process, the heat exchange medium is repeatedly heated until it reaches the preset temperature. It should be noted that the inlet and the outlet of the outer shell 41 are respectively arranged at the front and rear sides of the outer shell 41 to correspond to the first fixed blade cascade 42 and the second fixed blade cascade 44 respectively.

[0057] Furthermore, the required preset temperature of the heat exchange medium entering the shell side of the second heat exchanger 50 is between 600-1200°C, and the specific temperature needs to be set according to the actual needs of lubricating oil refining. The method for adjusting the temperature can be to change the number of heaters 40 in a working state, or to change the rotation speed of the rotating blade 43 to change the maximum speed of the heat exchange medium. The faster the speed of the heat exchange medium, the greater the kinetic energy, and the more internal energy is converted when impacting the second fixed blade.

[0058] It should be noted that, in a specific embodiment of the present application, the number of the first fixed blades and the second fixed blades can be determined according to the heat load required by the system. Further, the number of the first fixed blades and the second fixed blades is the same, and the number is between 30-40.

[0059] In the embodiment of the present application, both the first fixed blade and the second fixed blade have a curved streamline profile to facilitate better introduction or export of the heat exchange medium into or out of the heating space.

[0060] In an embodiment of the present application, the installation angle of the first fixed blade is between 35° and 75°, the inlet angle of the first fixed blade is between 0° and 45°, and the outlet angle of the first fixed blade is between 35° and 75°; the installation angle of the second fixed blade is between 45° and 85°, the inlet angle of the second fixed blade is between 25° and 65°, and the outlet angle of the second fixed blade is between 25° and 65°.

[0061] In the embodiment of the present application, the rotating blade grid 43 includes a plurality of rotating blades, each of which has a curved profile toward its rotation direction to better accelerate the heat exchange medium.

[0062] In the embodiment of the present application, the installation angle of the rotating blade is between 10° and 80°, the inlet angle of the rotating blade is between 35° and 75°, and the outlet angle of the rotating blade is between 35° and 75°.

[0063] refer to Figure 4 , Figure 4From left to right, there are the first fixed blade of the first fixed blade 42, the rotating blade of the rotating blade 43, and the second fixed blade of the second fixed blade 44. The heat exchange medium moves along the flow channel formed by the three. The angle settings of the first fixed blade, the rotating blade, and the second fixed blade are optimized to achieve effective heating of the heat exchange medium. Specifically, the specific angle settings of the first fixed blade, the rotating blade, and the second fixed blade can be optimized and selected according to the fluid dynamics requirements and the heating effect. By reasonably setting the installation angles of the first fixed blade, the rotating blade, and the second fixed blade, the heat exchange medium can flow smoothly between the rotating blade and the fixed blade, thereby effectively introducing or exporting the heat exchange medium into or out of the heating space. When selecting the installation angle, factors such as the speed and flow direction of the heat exchange medium, as well as the gap and shape between the blades, can be considered to ensure the best fluid dynamics performance and heat transfer effect.

[0064] To achieve the above purpose, the present application also provides a low-carbon lubricating oil refining process, comprising:

[0065] S1: shock-wave heating the heat exchange medium and introducing it into the shell side of the heat exchanger 50;

[0066] S2: The crude oil is pressurized by the booster pump 31 and enters the tube side of the heat exchanger 50, where it is mixed with hydrogen after heat exchange with the heat exchange medium;

[0067] S3: Hydrofining the crude oil in the reactor 10;

[0068] S4: Separating hydrogen and the first liquid phase stream in the high-pressure separator 21;

[0069] S5: Separating the first liquid phase stream into a first gas phase stream and a second liquid phase stream in the low-pressure separator 22 .

[0070] In the embodiment of the present application, step S4 also includes: remixing the separated hydrogen with the feedstock oil.

[0071] In the embodiment of the present application, the temperature of the heated heat exchange medium is between 600-1200°C.

[0072] In the embodiment of the present application, the temperature of the feedstock oil after heat exchange is between 180-280°C.

[0073] Specifically, the heat exchange medium may preferably be air, nitrogen or water vapor; the air pressure at the inlet of the shock wave heating channel 45 is between 2.5-5 bar, and the temperature is room temperature or the temperature of the heat exchange medium recovered by the circulation device.

[0074] See also Figure 1 In a specific embodiment of the present application, the lubricating oil refining process is:

[0075] After being pressurized by the booster pump 31, the crude oil enters the tube side of the heat exchanger 50 to exchange heat with the heat exchange medium, which is heated by the heater 40 and then buffered by the second mixer 62 to enter the shell side of the heat exchanger 50; after being heated, the crude oil enters the first mixer 61 to mix with the hydrogen in the first buffer tank 32 and the circulating hydrogen in the second buffer tank 33, and then enters the reactor 10. The reaction product is cooled by the cooler 70 and enters the high-pressure separator 21 to separate the circulating hydrogen entering the second buffer tank 33. The liquid product at the bottom of the high-pressure separator 21 is hydrogenated oil, which enters the low-pressure separator 22 after being decompressed to separate gaseous hydrocarbons and liquid products, and the liquid products are carried to be distilled into qualified products.

[0076] The following are specific examples and comparative examples of the present application.

[0077] Example 1

[0078] Taking the 900,000 tons / year low-carbon furfural refining system as an example, the initial temperature of the crude oil is 20°C, the temperature of the crude oil after heating is 225°C, and the required heat load is 8000KW. The first fixed blade cascade 42 includes 32 first fixed blades, the second fixed blade cascade 44 includes 32 second fixed blades, and the rotating blade cascade 43 includes 64 rotating blades. The installation angle of the first fixed blade is 56.5°, the inlet angle is 1°, and the outlet angle is 49.9°; the installation angle of the second fixed blade is 75.52°, the inlet angle is 54.12°, and the outlet angle is 35.4°; the installation angle of the rotating blade is 74.7°, the inlet angle is 42.7°, and the outlet angle is 41.87. The rotating blade cascade 43 rotates at a speed of 7500rpm, the heat exchange medium is air, the speed of air entering the heater 40 is 115m / s, and the air is heated from 25°C to 775°C by the heater 40. The number of heaters 40 is two. The carbon emissions of this heating device are negligible.

[0079] Comparative Example 1

[0080] Taking the 900,000 tons / year raw furfural refining system as an example, the initial temperature of the crude oil is 20°C, the temperature of the crude oil after heating is 225°C, the branch temperature difference does not exceed 10°C, the temperature in the radiation room does not exceed 800°C, the fuel used is methane, and the annual carbon emissions are about 2,500 tons / year.

[0081] Example 2

[0082] Taking the 200,000 tons / year low-carbon phenol refining system as an example, the initial temperature of the crude oil is 20°C, the temperature of the crude oil after heating is 260°C, and the required heat load is 4416KW in total. The first fixed blade cascade 42 includes 30 first fixed blades, the second fixed blade cascade 44 includes 30 second fixed blades, and the rotating blade cascade 43 includes 60 rotating blades. The installation angle of the first fixed blade is 56.5°, the inlet angle is 1°, and the outlet angle is 49.9°; the installation angle of the second fixed blade is 75.52°, the inlet angle is 54.12°, and the outlet angle is 35.4°; the installation angle of the rotating blade is 74.7°, the inlet angle is 42.7°, and the outlet angle is 41.87. The rotating blade cascade 43 rotates at a speed of 7500rpm, the heat exchange medium is air, the speed of air entering the heater 40 is 115m / s, and the air is heated from 25°C to 775°C by the heater 40. The number of heaters 40 is one. The carbon emissions of this heating device are negligible.

[0083] Comparative Example 2

[0084] Taking 200,000 tons / year of raw phenol refining as an example, the initial temperature of the raw oil is 20°C, the temperature of the raw oil after heating is 260°C, the branch temperature difference does not exceed 15°C, the temperature in the radiation chamber does not exceed 820°C, the fuel used is methane, and the annual carbon emissions are about 5,500 tons. Through the above embodiments and comparative examples, the low-carbon hydrocracking system of the present application not only achieves the purpose of lubricating oil refining but also reduces the generation of carbon dioxide and sulfide, which is beneficial to environmental protection.

[0085] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A low-carbon lubricating oil refining system, characterized in that: include: A feed module, used for receiving crude oil and hydrogen; The heating module comprises a heat exchanger (50) and a heater (40), wherein the heater (40) is used to perform shock wave heating on a heat exchange medium, the tube side of the heat exchanger (50) is used to allow crude oil to pass through, and the shell side of the heat exchanger (50) is used to allow the heated heat exchange medium to pass through; The refining module comprises a reactor (10), a high-pressure separator (21) and a low-pressure separator (22) which are connected in sequence, wherein the reactor (10) is used to catalyze the reaction between crude oil and hydrogen, the high-pressure separator (21) is used to separate excess hydrogen, and the low-pressure separator (22) is used to separate gaseous hydrocarbons and refined oil.

2. The low-carbon lubricating oil refining system according to claim 1, characterized in that: The feed module comprises a booster pump (31), a first buffer tank (32) and a first mixer (61), wherein the booster pump (31) and the first mixer (61) are connected to the inlet and outlet of the pipe path respectively, and the first buffer tank (32) is directly connected to the first mixer (61).

3. The low-carbon lubricating oil refining system according to claim 2, characterized in that: The feed module further comprises a second buffer tank (33), the inlet of the second buffer tank (33) being connected to the high-pressure separator (21), and the outlet of the second buffer tank (33) being connected to the first mixer (61), and the hydrogen separated by the high-pressure separator (21) enters the first mixer (61) through the second buffer tank (33) and continues to circulate.

4. The low-carbon lubricating oil refining system according to claim 1, characterized in that: The heating module further comprises a second mixer (62), the number of the heaters (40) is multiple and all are connected to the second mixer (62) one by one, and the second mixer (62) is used to collect the heat exchange medium discharged from the multiple heaters (40) and introduce it into the shell side of the heat exchanger (50).

5. The low-carbon lubricating oil refining system according to claim 4, characterized in that: The heating module further comprises a circulation device, wherein the circulation device is used to reintroduce the heat exchange medium discharged from the heat exchanger (50) into the heater (40).

6. The low-carbon lubricating oil refining system according to claim 1, characterized in that: The heater (40) comprises an outer shell (41), a first fixed blade grid (42), a rotating blade grid (43), a second fixed blade grid (44) and a rotor. The outer shell (41) forms a shock wave heating channel (45). The cross section of the shock wave heating channel (45) is annular. The first fixed blade grid (42), the rotating blade grid (43) and the second fixed blade grid (44) are sequentially arranged in the shock wave heating channel (45) from front to back. The rotor is arranged on the outer shell (41) and is used to drive the rotating blade grid (43) to rotate in the shock wave heating channel (45).

7. The low-carbon lubricating oil refining system according to claim 6, characterized in that: The heater (40) further comprises a plurality of partitions arranged in the shock wave heating channel (45), the plurality of partitions being used to separate a plurality of heating spaces, each of the heating spaces being provided with a plurality of first fixed blades for constituting the first fixed blade grid (42), and a plurality of second fixed blades for constituting the second fixed blade grid (44).

8. The low-carbon lubricating oil refining system according to claim 7, characterized in that: The first stationary blade and the second stationary blade each have a curved streamline profile.

9. The low-carbon lubricating oil refining system according to claim 8, characterized in that: The installation angle of the first fixed blade is between 35° and 75°, the inlet angle of the first fixed blade is between 0° and 45°, and the outlet angle of the first fixed blade is between 35° and 75°; the installation angle of the second fixed blade is between 45° and 85°, the inlet angle of the second fixed blade is between 25° and 65°, and the outlet angle of the second fixed blade is between 25° and 65°.

10. The low-carbon lubricating oil refining system according to claim 7, characterized in that: The rotating blade grid (43) comprises a plurality of rotating blades, each of which has a curved profile facing its rotation direction.

11. The low-carbon lubricating oil refining system according to claim 10, characterized in that: The installation angle of the rotating blade is between 10° and 80°, the inlet angle of the rotating blade is between 35° and 75°, and the outlet angle of the rotating blade is between 35° and 75°.

12. A low-carbon lubricating oil refining process, characterized in that: The process comprises: S1: shock-heating the heat exchange medium and introducing it into the shell side of the heat exchanger (50); S2: The crude oil is pressurized by the booster pump (31) and enters the tube side of the heat exchanger (50), exchanges heat with the heat exchange medium, and then mixes with the hydrogen; S3: hydrofining the crude oil in the reactor (10); S4: separating hydrogen and a first liquid phase stream in a high-pressure separator (21); S5: Separating the first liquid phase stream into a first gas phase stream and a second liquid phase stream in a low-pressure separator (22).

13. The low-carbon lubricating oil refining process according to claim 12, characterized in that: In the step S4, it also includes: mixing the separated hydrogen with the feedstock oil again.

14. The low-carbon lubricating oil refining process according to claim 12, characterized in that: In the step S1, the temperature of the heated heat exchange medium is between 600-1200°C.

15. The low-carbon lubricating oil refining process according to claim 12, characterized in that: In the step S2, the temperature of the raw oil after heat exchange is between 180-280°C.

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