Dynamic coking device for evaluating coking property of oil product

Abstract

The utility model belongs to the field of spinning industry and manufacturing, and particularly discloses a dynamic coking device for evaluating the coking property of an oil product, the dynamic coking device comprises an automatic circulating pump, a concave coking plate and an oil reservoir, the automatic circulating pump is connected with an oil pipe, the oil outlet of the oil pipe is located right above the oil inlet end of the concave coking plate, and the oil inlet of the oil pipe is located in the oil reservoir; the concave coking plate is obliquely arranged, so that the oil inlet end of the concave coking plate is higher than the oil outlet end of the concave coking plate, the oil inlet end is positioned right below the oil outlet of the oil pipe, and the oil outlet end is positioned right above the inlet of the oil reservoir to form a circulating oil path; an automatic heating temperature control device is arranged under the concave coking plate, and the automatic circulating pump is used for pumping oil in the oil storage device to the concave coking plate through the oil pipe for heating and coking. The device provided by the utility model is less in oil consumption, and can accurately evaluate the coking property of the oil product.

Description

Technical Field

[0001] The present application belongs to the field of spinning industry and manufacturing, and more specifically, to a dynamic coking device for evaluating the coking properties of oil products. Background Art

[0002] In many spinning and manufacturing industries, equipment such as spinning hot rollers and chains operating in high-temperature environments must operate in high-temperature environments. High temperatures can alter the stability and chemical properties of oils, which can cause them to deteriorate or affect their performance. Furthermore, some components can easily oxidize and form coke in long-term high-temperature environments. This coke can increase yarn breakage rates, increase hot roller cleaning frequency, and hinder lubricity, hindering smooth production. Therefore, evaluating the changes in the viscosity, lubricity, oxidation resistance, and coking properties of spinning oils and lubricants in high-temperature environments is crucial for guiding product development.

[0003] Existing methods for evaluating the coking performance of oil products often use egg tart shells, beakers, or crucibles to hold the oil and place it in an oven for static coking, or use an oil heat resistance test bench for coking. Problems with the static coking method include: a thick oil film and slow coking; test results are affected by the oven's flatness, resulting in poor repeatability; and significant differences from the oil's actual use scenario. In actual production, coking occurs over time, during which a large amount of new oil reacts with heat radiation. The oil typically produces smoke, which can also form coke when it falls back onto the surface of the heating device. This results in the existing static evaluation method being unable to accurately reflect the oil's coking performance. The oil heat resistance test bench is complex to operate, and due to its large frame, it requires a large sample size, consumes a lot of energy, generates a lot of smoke and odor, pollutes the environment, and is difficult to clean after use. Utility Model Content

[0004] In response to the defects or improvement needs of the existing technology, the present application provides a dynamic coking device for evaluating the coking properties of oil products, aiming to solve the problems of poor coking efficiency and inaccurate coking performance evaluation in the existing oil coking method.

[0005] The present application provides a dynamic coking device for evaluating the coking properties of oil products, comprising: an automatic circulating pump, a concave coking plate and an oil reservoir which are sequentially connected to form a circulating oil circuit, the automatic circulating pump being connected to an oil pipe, the oil outlet of the oil pipe being located directly above the oil inlet end of the concave coking plate, and the oil inlet of the oil pipe being located in the oil reservoir; the concave coking plate being tilted so that its oil inlet end is higher than its oil outlet end, and the oil inlet end is located directly below the oil outlet of the oil pipe, and the oil outlet end is located directly above the inlet of the oil reservoir to form a circulating oil circuit; an automatic heating and temperature control device is provided directly below the concave coking plate, and the automatic circulating pump is used to pump the oil in the oil reservoir via the oil pipe to the concave coking plate for heating and coking.

[0006] The above-mentioned dynamic coking device provided in the present application is designed to have a concave coking plate inclined at a certain angle, cooperate with an automatic circulation pump to control the oil output rate of the oil pipe, and then combine the surface material of the concave coking plate to control the flow of oil on the concave coking plate at a rate that meets the actual working conditions to form an oil film. At the same time, an automatic heating and temperature control device is set to heat and coke the oil-bearing area of ​​the concave coking plate. While heating, the oil continues to flow through the oil film that has been formed, which can more realistically reflect the coking conditions of the hot rollers in spinning and chains running in high-temperature environments, thereby realizing accurate evaluation of the coking performance of various oils.

[0007] Furthermore, the length of the concave coking plate is 9 to 10 times its width, which enables the oil to flow through the concave coking plate faster and form a thin oil film faster in the process of flowing through the concave coking plate, without overflowing from the concave coking plate due to excessive flow rate.

[0008] Furthermore, the surface roughness of the concave coking plate is N9-N11, so that the coking plate can still have good reusability after being polished and cleaned with 240-grit sandpaper.

[0009] Furthermore, the concave coking plates are arranged in parallel in a plurality of pieces, and the materials of the plurality of concave coking plates are the same or different. Preferably, the materials of the concave coking plates are metal, glass, ceramic, polyamide, or polyethylene terephthalate. Concave coking plates made of one or more materials can be selected to perform multiple sets of dynamic coking tests simultaneously based on the working conditions of different oil products to be tested. This allows the flow rates and flow rates of multiple different oil products on the corresponding concave coking plates to be controlled simultaneously, thereby improving test efficiency as well as test repeatability and reproducibility.

[0010] Furthermore, a lifting device is provided below the automatic circulation pump, and an inclination control device is provided below the oil outlet end of the concave coking plate. The inclination control device cooperates with the lifting device to make the concave coking plate have a set inclination angle with the horizontal plane.

[0011] Furthermore, the set inclination angle is within the range of 5° to 60°. Compared with the inclination angle range in the prior art, this inclination angle range can more accurately control the rate of oil products with different viscosities and properties flowing through the concave coking plate.

[0012] Furthermore, the automatic circulation pump's oil return rate is identical to the oil delivery rate of the oil pipe. The automatic circulation pump controls the oil delivery rate of the oil pipe to a range of 0.0018 mL / min to 0.56 mL / min, enabling the oil to partially dissolve the coke, more closely resembling the actual operating conditions of the oil. This helps to more accurately evaluate the oil's self-cleaning ability, while also maximizing oil utilization, improving test efficiency, and reducing test fuel consumption.

[0013] Furthermore, the concave coking plate is provided with a long strip groove along the oil flow direction, the oil inlet and outlet ends of the long strip groove are mutually connected, and convex edges are provided on both sides, thus ensuring uniformity of oil film thickness and heating.

[0014] Furthermore, the concave coking plate comprises a plurality of pieces, and the materials of the plurality of concave coking plates are different, so that the coking performance test of the oil product under various working conditions can be realized.

[0015] Furthermore, the automatic heating and temperature control device has a heating temperature range of 50°C to 550°C. It can independently monitor and control the real-time temperature of each concave coking plate. This setup allows for the coking evaluation of different oil products by setting corresponding temperature parameters based on the actual operating temperature, allowing for simulated evaluation of thermal coking and high-temperature stability. Furthermore, the temperature of each concave coking plate can be precisely controlled in real time, effectively avoiding deviations in coking evaluations caused by varying heating times for different oil products.

[0016] In general, the above technical solutions conceived by this application have the following technical advantages compared with the existing technologies:

[0017] 1. This application designs a dynamic coking device with a circulating oil circuit. An automatic circulating pump pumps the oil from the oil reservoir through an oil pipe to the concave coking plate for heating and coking. The automatic circulating pump controls the oil delivery and return of the oil pipe, and the concave coking plate is tilted to flexibly control the flow rate of the oil on the concave coking plate, thereby forming an oil film of uniform thickness. This improves the efficiency of heating and coking, and enables more accurate assessment of the coking properties of the oil under specific operating conditions. Furthermore, the testing process of this device is more environmentally friendly and consumes less oil.

[0018] 2. This application designs the concave coking plate to be at least 9-10 times longer than its width. This allows the oil to quickly spread to form a thin oil film, controls the time it takes to flow through the concave coking plate, and ensures efficient coking and accurate weighing after coking.

[0019] 3. To ensure uniform oil film spreading, this application controls the surface roughness of the coking plate to approximately level 9-10. This ensures that the coking plate retains good reusability after sandpaper polishing and cleaning, thereby extending the service life of the dynamic coking device and saving testing costs.

[0020] 4. The automatic heating and temperature control device described in this application can heat within a range of 50°C to 550°C based on the operating temperature requirements of spinning oils, lubricants, etc. It also accurately monitors the temperature of each coking plate in real time, effectively avoiding deviations in coking evaluations caused by varying heating times. During coking tests on different oils, the temperature can be set based on the actual operating temperature, allowing for simultaneous simulation and evaluation of the thermal coking properties and high-temperature stability of different oils.

[0021] 5. The dynamic coking device in this application has a simple structure and easy operation method, and has no requirements for the test environment. By setting the inclination angle of the concave coking plate from 5° to 60°, and designing the oil output rate of the oil pipe and the oil return rate of the automatic circulation pump to be the same, both within the range of 0.0018mL / min to 0.56mL / min, it can more efficiently utilize the test oil and obtain a more uniform oil film, thereby achieving a more accurate assessment of the coking properties of the oil under the corresponding operating conditions.

[0022] 6. The dynamic coking device of this application is equipped with multiple parallel concave coking plates made of different materials. An automatic circulation pump can simultaneously control the flow rate and flow rate of different oil products on multiple concave coking plates of different or identical materials, further improving testing efficiency and test repeatability and reproducibility, and adapting to different oil operating conditions.

[0023] 7. The coking conditions of the dynamic coking device provided in this application are closer to the actual operating conditions of the oil product. In actual operating conditions, the coke will partially dissolve the oil product located above the coke. In this application, the oil on the coking plate is also located above the coke and continuously flows at a specific rate. Therefore, the coke can be simultaneously dissolved and carried away by the flowing oil. The remaining coke is closer to the actual coking condition of the oil product, thus better reflecting the actual coking condition of the oil product and more accurately evaluating the self-cleaning ability of the oil product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the dynamic coking device provided in the embodiment of the present application;

[0025] Figure 2 It is a partial schematic diagram of the top view of the dynamic coking device provided in an embodiment of the present application.

[0026] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0027] 1-automatic circulation pump, 11-lifting device, 2-oil pipe, 3-automatic heating temperature control device, 4-concave coking plate, 41-inclination control device, 42-long strip groove, 43-convex edge, 5-oil reservoir. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] The present application provides a dynamic coking device for evaluating the coking property of oil products, such as Figure 1 As shown, it includes an automatic circulation pump 1, an oil pipe 2, an automatic heating temperature control device 3, a concave coking plate 4 and an oil reservoir 5. The automatic circulation pump 1 is connected to the oil pipe 2, and is connected to the concave coking plate 4 and the oil reservoir 5 in sequence to form a circulating oil circuit.

[0030] The aforementioned oil pipe 2 is divided into two sections. One section is connected to the outlet of the automatic circulating pump 1, with its oil outlet located directly above the oil inlet of the concave coking plate 4. The other section is connected to the inlet of the automatic circulating pump 1, with its oil inlet extending into the bottom of the oil reservoir 5. The aforementioned automatic circulating pump 1 is used to control the oil output rate of the section connected to its outlet, and also to control the oil return rate of the other section connected to its inlet.

[0031] The concave coking plate 4 is tilted, and its oil inlet end is higher than the oil outlet end. It is used to receive the oil flowing out of the oil pipe 2 and make the oil flow continuously from high to low on the concave coking plate 4 to form an oil film.

[0032] Specifically, there are multiple concave coking plates 4, including four in this embodiment, and the four concave coking plates are parallel to each other and are all arranged at an angle. The higher end of each concave coking plate 4 is provided with a corresponding oil pipe 2, and the higher end of each concave coking plate 4 is correspondingly provided with an oil reservoir 5 for collecting oil products; the automatic heating and temperature control device 3 is located directly below the concave coking plate 4, and is used to heat the oil film to coke.

[0033] The aforementioned oil reservoir 5 is arranged at the oil outlet end of the concave coking plate 4, and is used to receive the oil that continuously flows out from high to low on the concave coking plate 4. The automatic circulation pump 1 can pump the oil in the oil reservoir 5 to the oil outlet of the oil pipe 2 through the oil inlet of the oil pipe 2, thereby realizing the recycling of the oil.

[0034] In this embodiment, the aforementioned automatic circulation pump 1 is selected as a centrifugal circulation pump or a plunger circulation pump, which can achieve high-precision, smooth and pulsation-free liquid transmission, and the oil output speed can be set via keyboard operation. In addition, the automatic circulation pump has a flow rate range of 0.00011L / min to 750L / min; the speed range of the automatic circulation pump 1 is: (0.1 to 150rpm) ± 0.2%rpm; the oil outlet height of the oil pipe 2 and the oil outlet end height of the concave coking plate 4 should not be too high from the corresponding oil receiving end to prevent oil splashing and ensure test safety.

[0035] In this embodiment, a lifting device 11 is provided below the automatic circulation pump 1, the oil pipe 2 is fixed above the automatic circulation pump 1, the oil receiving end of the concave coking plate 4 is provided directly below the oil outlet of the oil pipe 2, and an inclination control device 41 is provided below the oil outlet end of the concave coking plate 4. The inclination control device 41 cooperates with the lifting device 11 to tilt the concave coking plate 4.

[0036] Specifically, the lifting device 11 below the automatic circulation pump 1 can be a hydraulic lifting platform that uses a hydraulic system to achieve the lifting and lowering movement of the load-bearing platform; or a micro screw lift that uses electricity to drive the screw movement to drive the load-bearing platform to lift and lower, or any other lifting device that can achieve automatic lifting. The tilt angle control device 41 can be the same device as the lifting device 11, as long as the two devices cooperate to automatically adjust the height so that the surface of the concave coking plate 4 forms an acute angle with the horizontal plane.

[0037] In this embodiment, the aforementioned four concave coking plates 4 can be detachably mounted on the heating zone of the automatic heating and temperature control device 3, so that they can be replaced at will before and after the test. Specifically, fixed buckles, slots and other structures can be provided in the heating area to cooperate with the concave coking plates 4 for connection.

[0038] In this embodiment, the inclination angle of the concave coking plate 4 is within the range of 5°~60°. The inclination angle can be adjusted to 5°, 15°, 25°, 35°, 45°, 55°, 60°, etc., or it can be adjusted to any angle value between any two of the above angle values. If it exceeds the above inclination angle range, due to the sampling rate of the oil pipe 2 and the size limitation of the concave coking plate 4, the oil sampling rate on the concave coking plate 4 will not meet the requirements of simulating actual working conditions.

[0039] In this embodiment, the surface roughness of the concave coking plate 4 is N9-N11, and the optimal roughness is N10, that is, the Ra value is level 4 in Table 1. The specific values ​​corresponding to the roughness levels are shown in the following table:

[0040] Table 1 Surface roughness grade correspondence table

[0041]

[0042] The concave coking plate 4 of this roughness grade has the highest reuse rate and has good reuse performance after being polished with 240-grit sandpaper after each use.

[0043] In this embodiment, the length of the concave coking plate 4 is 9 to 10 times its width, and the width is relatively small, primarily to ensure uniform heating when multiple concave coking plates 4 are arranged side by side above the heating device. If the concave coking plates 4 are too large, the efficiency of oil film formation and oil flow rate will be affected, as well as the accuracy of post-coking weighing.

[0044] In this embodiment, the materials of the four concave coking plates 4 can be the same or different, and can be selected according to the oil working conditions corresponding to the test, including but not limited to metal, glass, ceramics, polyamide (PA), polyethylene terephthalate (PET). The most preferred material is metal, because for common oils such as spinning oils and lubricating oils, coking usually occurs on hot rollers, circular machines, and chains, so metal coking plates are more suitable for the use scenarios of spinning oils and lubricating oils.

[0045] In this embodiment, the concave coking plate 4 is provided with a long strip groove 42 along the flow direction of the oil product, the oil inlet end and the oil outlet end of the long strip groove 42 are interconnected, and the bottom surface of the long strip groove 42 is flat; the edges on both sides are provided with convex edges 43, and the bottom surface between the convex edges 43 on both sides is flat for the oil product to flow and form a film; the convex edges 43 ensure that the oil product will not overflow from the long strip groove 42 at any flow rate.

[0046] In this embodiment, the automatic circulation pump 1 controls the oil output rate of the oil pipe 2 to be 0.0018mL / min~0.56mL / min, such as 0.0018mL / min, 0.0028mL / min, 0.004mL / min, 0.05mL / min, 0.078mL / min, 0.5mL / min, 0.56mL / min, etc., or any speed value between any two of the above values. The rate at which the automatic circulation pump 1 pumps the oil in the oil reservoir 5 into the oil inlet of the oil pipe 2 (i.e., the oil return rate) is the same as the rate at which it controls the oil product to flow out of the oil outlet of the oil pipe 2. Within this speed range, in conjunction with the inclination of the concave coking plate 4, different oil products can achieve the most efficient flow film formation. For example, the larger the inclination angle, the smaller the oil output rate is controlled. If the inclination angle is smaller, the oil output rate can be controlled to be larger, so that the flow rate of oil products of different viscosities on the concave coking plate 4 meets the test requirements.

[0047] In this embodiment, according to the temperature requirements of the spinning oil and lubricating oil working conditions, an automatic heating and temperature control device 3 with an accurate temperature sensor and control system is selected. Specifically, a heating table with an automatic temperature control function or other heating devices with the same heating function and heating temperature range, such as a heating furnace, can be selected, and the heating area can be zoned to control the temperature to cope with the situation when multiple concave coking plates exist. The heating system of the heating table also has the function of automatic alarm and shutdown at a certain point. Its temperature range is: 50℃~550℃, such as 50℃, 60℃, 70℃, 90℃, 100℃, 200℃, 300℃, 400℃, 450℃, 550℃, etc., or the range between any two of the above temperatures. It can realize real-time and accurate monitoring of the temperature of the coking plate and effectively avoid the deviation of the coking evaluation results caused by different heating times. When evaluating the coking performance of different oil products, the corresponding temperature parameters of the heating table are set according to the actual working temperature, so as to simulate and evaluate the thermal coking property and high temperature stability.

[0048] The working principle of the dynamic coking device provided in any of the above embodiments is:

[0049] Step 1: Control the concave coking plate 4 to tilt to a specific acute angle with the horizontal plane, such as 50°;

[0050] Step 2: Control the automatic circulation pump 1 to provide power to the oil pipe 2, so that the oil product continuously flows onto the concave coking plate 4 at a specific speed and continuously flows and spreads from high to low;

[0051] Step 3: When the oil on the concave coking plate 4 flows to form a complete oil film, the automatic heating and temperature control device 3 is controlled to start heating the concave coking plate 4, and the oil is kept flowing during heating until the heating is stopped after a specific time;

[0052] Step 4: Remove the concave coking plate 4 to weigh the coked material, and then perform the subsequent conventional coking performance evaluation steps.

[0053] In order to illustrate the excellent effect of the dynamic coking device provided by the present application, the test results obtained after conducting a coking test using the dynamic coking test device of the present application are now provided.

[0054] Test 1: Coking properties of different oils

[0055] The dynamic coking device provided in any of the aforementioned embodiments is used to conduct an oil circulation coking test. The four concave coking plates are made of metal stainless steel to distinguish the coking properties of different oils. From left to right, they are the concave coking plates after the coking of spinning oil 1#, spinning oil 2#, lubricating oil 3#, and lubricating oil 4#. The inclination angle of each concave coking plate is about 40°, the surface roughness is level 10, the length is about 9 times the width, and the bottom thickness is relatively thin. During the test, the oil output rate and the oil return rate of the automatic circulation pump 1 are controlled to be the same. The test is carried out according to the working principle of the aforementioned dynamic coking device.

[0056] As shown in Table 2 below, after the coking test, compared with spinning oil 1# and spinning oil 2#, spinning oil 1# had a smaller coking amount, volatility, and oil viscosity change rate before and after coking than spinning oil 2#, and the return oil color was darker than spinning oil 2#. The coke washability and coke self-cleaning ability of the coke product were also better than those of spinning oil 2#. Compared with lubricant 3# and lubricant 4#, lubricant 4# had a smaller coking amount, volatility, and oil viscosity change rate before and after coking than lubricant 3#, and the return oil color was lighter than lubricant 3#. The coke washability and coke self-cleaning ability of the coke product were also better than those of lubricant 3#.

[0057] Table 2 Differences in coking properties of different oils

[0058]

[0059] The above results demonstrate that the dynamic coking device of this application can be used to efficiently evaluate oil products in multiple dimensions, distinguishing differences in the coking properties of the same oil product under different operating conditions, and simultaneously distinguishing differences in the coking properties of different types of oil products. This demonstrates that the dynamic coking device and its dynamic coking method of this application can, to a certain extent, reflect the actual application scenarios of oil products and have important guiding significance for the development and improvement of oil products.

[0060] Test 2: Coking test of the same oil on coking plates of different materials

[0061] The concave coking plate 4 in the dynamic coking apparatus of this application was identical to that in Experimental Example 1, except for the material. The concave coking plate was sequentially set to four different materials: stainless steel, carbon steel, glass, and ceramic. The coking properties of oil product 5# on the concave coking plates of different materials were then tested and evaluated using the dynamic coking method.

[0062] As shown in Table 1, after the coking test, it was found that the thermal volatility of oil product 5#, the color and state of the return oil, and the viscosity change rate of the oil product before and after coking on each concave coking plate were not much different, but the coke state, coke amount, coke washability and coke self-cleaning ability were quite different.

[0063] On the coking plates made of stainless steel and carbon steel, coking is obvious, and the washability and self-cleaning ability of the coking materials are poor; on the coking plates made of glass and ceramics, coking is not obvious, and the washability and self-cleaning ability of the coking materials are good.

[0064] However, the actual coking of oil product 5# occurs on the metal hot roller, so the coking properties of oil product 5# on glass or ceramic coking plates cannot accurately represent the coking properties of oil product 5# on metal hot rollers. Therefore, the coking property evaluation should be timely replaced with the coking plate that matches the oil product application scenario according to the actual working conditions; otherwise, the coking evaluation results will be different. The concave coking plate of this application can be disassembled and replaced with the required corresponding materials such as metal, glass, ceramic, polymer materials (PA, PET), etc. according to the actual working conditions, making it suitable for a wider range of oil product working conditions.

[0065] Table 3 Differences in coking properties of the same oil on coking plates of different materials

[0066]

[0067] Test 3: Comparison of the coking effect of static coking method and dynamic coking method

[0068] The coke products obtained after static coking tests using egg tart shells on samples 1-4 in an oven showed significant differences in coking evaluations compared to dynamic coking return oil. The coking evaluations obtained using the dynamic coking apparatus of this application on oils 1#, 2#, 3#, and 4# showed significant differences, as well as significant differences in self-cleaning capabilities. Specifically, oil 3# exhibited severe coking, oil 2# exhibited significant coking, oil 4# exhibited minimal coking, and oil 1# exhibited virtually no coking, similar to the actual coking behavior of each oil under its corresponding operating conditions.

[0069] After conducting a coking test under the same test conditions using a static coking device, it was found that from left to right, among the 1#, 2#, 3#, and 4# oil products, except for the 3# oil product (the third from left to right) which had serious coking, the 1#, 2#, and 4# oil products had almost no coking, and the coking conditions were basically the same, indicating that static coking cannot reflect the actual coking conditions of the oil products under the corresponding working conditions.

[0070] The above results show that the test conditions of the dynamic coking device provided in this application are more in line with the oil working conditions. At the same time, the design of the circulating oil circuit makes the oil consumption in the test smaller, and can more efficiently and accurately evaluate the coking differences between different oils (Note: The oil heat resistance performance test bench requires a large sample volume, a lot of smoke, and a strong smell, and the environment does not allow comparative verification).

[0071] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0072] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0074] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0075] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A dynamic coking device for evaluating the coking property of oil products, characterized in that: include: An automatic circulation pump (1), a concave coking plate (4) and an oil reservoir (5) are provided. The automatic circulation pump (1) is connected to an oil pipe (2), the oil outlet of the oil pipe (2) is located directly above the oil inlet end of the concave coking plate (4), and the oil inlet of the oil pipe (2) is located in the oil reservoir (5); the concave coking plate (4) is tilted so that its oil inlet end is higher than its oil outlet end, and the oil inlet end is located directly below the oil outlet of the oil pipe (2), and the oil outlet end is located directly above the inlet of the oil reservoir (5), so as to form a circulating oil circuit; an automatic heating and temperature control device (3) is provided directly below the concave coking plate (4), and the automatic circulation pump (1) is used to pump the oil in the oil reservoir (5) to the concave coking plate (4) via the oil pipe (2) for heating and coking.

2. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: The length of the concave coking plate (4) is 9 to 10 times its width.

3. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: The concave coking plates (4) are arranged in parallel in a plurality of pieces, and the materials of the plurality of concave coking plates (4) are the same or different.

4. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: The surface roughness of the concave coking plate (4) is N9-N11.

5. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: A lifting device (11) is provided below the automatic circulation pump (1), and an inclination control device (41) is provided below the oil outlet end of the concave coking plate (4). The inclination control device (41) cooperates with the lifting device (11) to make the concave coking plate (4) have a set inclination angle with the horizontal plane.

6. A dynamic coking device for evaluating the coking property of oil products according to claim 5, characterized in that: The set inclination angle is within the range of 5° to 60°.

7. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: The oil return rate of the automatic circulation pump (1) is the same as the oil discharge rate of the oil pipe (2).

8. A dynamic coking device for evaluating the coking property of oil products according to any one of claims 1 to 7, characterized in that: The concave coking plate (4) is provided with a long strip groove (42) along the oil flow direction, the oil inlet end and the oil outlet end of the long strip groove (42) are interconnected, and convex edges (43) are provided on both sides.

9. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: The concave coking plate (4) is made of metal, glass, ceramic, polyamide or polyethylene terephthalate.

10. A dynamic coking device for evaluating the coking property of oil products according to claim 1, characterized in that: The heating temperature range of the automatic heating and temperature control device (3) is 50°C to 550°C.

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