Coal-based needle coke sedimentation buffer system
By introducing settling buffer tanks and stirring devices into the production of coal-based needle coke, the problems of uneven mixing of the mixed solvent and raw material asphalt and unstable temperature were solved, improving the settling effect and product quality, reducing resource waste, and enhancing the operational stability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-03
AI Technical Summary
In existing technologies, the mixed solvent and raw asphalt are prone to uneven mixing and unstable temperature when entering the settling tank, which affects the pass rate of quinoline insoluble matter index and leads to poor settling effect.
A settling buffer tank is introduced, and a stirring device and a steam heater are installed in it to ensure uniform mixing and stable temperature of the mixed solvent and raw asphalt. Unqualified materials are reprocessed through a return pump.
It improves the mixing uniformity and temperature stability of the mixed solvent and raw asphalt, enhances settling efficiency and product quality, reduces resource waste, and improves the operational stability of the system.
Smart Images
Figure CN224077294U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal-based needle coke production technology, specifically relating to a coal-based needle coke settling buffer system. Background Technology
[0002] The production of needle coke consists of three processes: raw material pretreatment, coking, and calcination. Raw material pretreatment involves mixing raw bitumen and a mixed solvent in a specific ratio, then allowing the mixture to settle in a settling tank to remove quinoline-insoluble matter. A light-phase mixed oil is collected from the top of the settling tank, and a heavy-phase mixed oil is collected from the bottom. Both light and heavy-phase mixed oils are then passed through a heating furnace before entering a distillation column for distillation. Refined bitumen is collected from the bottom of the light-phase distillation column and used as raw material for the coking process. Medium-temperature bitumen and anthracene oil are produced as byproducts from the bottom and middle sections of the heavy-phase distillation column, respectively. The mixed solvent is recycled.
[0003] In actual production, samples of the light phase mixed oil are taken online from the top of the settling tank for analysis of quinoline insoluble content. A sample with a quinoline insoluble content of ≤0.1% is considered qualified.
[0004] However, in the existing technology, when the mixed solvent and raw asphalt enter the settling tank, uneven mixing or unstable material temperature will affect the settling effect and cause the quinoline insoluble matter index to fail to meet the standard. Utility Model Content
[0005] Based on the above-mentioned technical problems, the purpose of this utility model is to provide a coal-based needle coke settling buffer system. By introducing a settling buffer tank into the system, the mixed solvent and raw material asphalt can be mixed evenly and a stable temperature can be maintained, thereby optimizing the settling effect and product quality.
[0006] The specific technical solution is as follows:
[0007] A coal-based needle coke settling and buffering system includes: a settling buffer tank, a settling tank, a light phase heater, a light phase distillation column, a heavy phase heater, a heavy phase distillation column, and a defective material return pump; the settling buffer tank is provided with a material inlet and a material outlet, the material outlet of the settling buffer tank is connected to the inlet of the feed pump, and the outlet of the feed pump is connected to the inlet of the settling tank, and the settling buffer tank is provided with a stirring device and a steam heater; the light phase material outlet of the settling tank is connected to the inlet of the light phase heater, and the outlet of the light phase heater is connected to the light phase distillation column; the heavy phase material outlet of the settling tank is connected to the inlet of the heavy phase heater, and the outlet of the heavy phase heater is connected to the heavy phase distillation column; the inlet and outlet of the defective material return pump are respectively connected to the light phase material outlet of the settling tank and the material inlet of the settling buffer tank.
[0008] In addition, the coal-series needle coke settling buffer system provided by this utility model may also have the following additional technical features:
[0009] In the above technical solution, the stirring device includes a motor, a drive shaft, and a stirring paddle.
[0010] In the above technical solution, the steam heater is provided with a steam inlet and a return water outlet.
[0011] In the above technical solution, the top of the settling buffer tank is equipped with an exhaust port.
[0012] In the above technical solution, valves are installed at both the input and output ends of the non-conforming material return pump.
[0013] The beneficial effects of this utility model on the settling and buffering system for needle-shaped coke in coal-bearing systems compared with the prior art are as follows:
[0014] 1. By introducing a settling buffer tank and utilizing the stirring device inside the settling buffer tank, the mixing solvent and raw material asphalt are ensured to be fully and evenly mixed. This helps to more effectively remove quinoline insolubles during the subsequent settling process, thereby improving the quality of refined asphalt. Furthermore, the steam heater can heat the material to 130 degrees Celsius and maintain a stable temperature, thereby improving the efficiency and quality of settling.
[0015] 2. When the content of quinoline insoluble matter in the light phase mixed oil is found to be excessive, the light phase mixed oil can be sent back to the settling buffer tank for reprocessing through the non-conforming material return pump, thereby reducing the waste of resources caused by product non-conformity and improving the operational stability of the entire system. Attached Figure Description
[0016] Figure 1 This is a flowchart of a coal-series needle coke settling buffer system according to the present invention;
[0017] Figure 2 This is a schematic diagram of the settling buffer tank of this utility model;
[0018] in, Figure 1 , Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0019] 10 Settling buffer tank, 11 Settling tank, 12 Light phase heater, 13 Light phase distillation column, 14 Heavy phase heater, 15 Heavy phase distillation column, 16 Non-conforming material return pump, 17 Material inlet, 18 Material outlet, 19 Feed pump, 20 Steam heater, 21 Light phase material outlet, 22 Heavy phase material outlet, 23 Motor, 24 Drive shaft, 25 Agitator, 26 Steam inlet, 27 Return water outlet, 28 Exhaust port, 29 Valve, 30 Manhole. Detailed Implementation
[0020] The following are specific implementation cases and appendices. Figure 1-2The present invention will be further described below, but the present invention is not limited to these embodiments.
[0021] A coal-bearing needle coke settling buffer system, such as Figure 1-2 As shown, the system includes: a settling buffer tank 10, a settling tank 11, a light phase heater 12, a light phase distillation column 13, a heavy phase heater 14, a heavy phase distillation column 15, and a non-conforming material return pump 16. The settling buffer tank 10 is equipped with a material inlet 17 and a material outlet 18. The material outlet 18 of the settling buffer tank 10 is connected to the inlet of the feed pump 19, and the outlet of the feed pump 19 is connected to the inlet of the settling tank 11. The settling buffer tank 10 is equipped with a stirring device and a steam heater. 20; The light phase material outlet 21 of the settling tank 11 is connected to the feed inlet of the light phase heater 12, and the discharge outlet of the light phase heater 12 is connected to the light phase distillation column 13; The heavy phase material outlet 22 of the settling tank 11 is connected to the feed inlet of the heavy phase heater 14, and the discharge outlet of the heavy phase heater 14 is connected to the heavy phase distillation column 15; The input and output ends of the non-conforming material return pump 16 are respectively connected to the light phase material outlet 21 of the settling tank 11 and the material inlet 17 of the settling buffer tank 10.
[0022] By adopting the above structure and introducing a settling buffer tank 10, the stirring device within the settling buffer tank 10 ensures thorough and uniform mixing of the mixed solvent and raw asphalt. This facilitates more effective removal of quinoline insolubles during subsequent settling, thereby improving the quality of refined asphalt. Furthermore, the steam heater 20 can heat the material to 130 degrees Celsius and maintain a stable temperature, thus improving the efficiency and quality of settling. When the quinoline insoluble content in the light phase mixed oil is detected to exceed the standard, the light phase mixed oil can be returned to the settling buffer tank 10 for reprocessing via the non-conforming material return pump. This reduces resource waste caused by product non-conformity and improves the overall system operational stability.
[0023] Specifically, the settling buffer tank 10 is also equipped with a manhole 30 to facilitate the maintenance of the interior of the settling buffer tank 10 by staff.
[0024] Specifically, the settling buffer tank 10 is equipped with a regulating valve at the material inlet 17 to regulate the feed rate of the mixed solvent and raw material asphalt.
[0025] In embodiments of this utility model, such as Figure 1 As shown, the stirring device includes a motor 23, a drive shaft 24, and a stirring paddle 25.
[0026] The motor 23 controls the rotation of the drive shaft 24 and the agitator 25 to stir the mixed solvent and raw asphalt in the settling buffer tank 10, so that they are mixed evenly.
[0027] In embodiments of this utility model, such as Figure 1As shown, the steam heater 20 is provided with a steam inlet 26 and a return water outlet 27.
[0028] The mixed liquid is heated by a steam heater 20.
[0029] In embodiments of this utility model, such as Figure 1 As shown, the settling buffer tank 10 is provided with an exhaust port 28 at the top.
[0030] In embodiments of this utility model, such as Figure 2 As shown, valves 29 are provided at both the input and output ends of the non-conforming material return pump 16.
[0031] Implementation process:
[0032] During normal production:
[0033] The mixed solvent and raw asphalt are fed into the settling buffer tank 10 at a 1:1 ratio. The mixed solvent and raw asphalt are stirred by a stirring device to ensure uniform mixing. The liquid is then heated to 130°C by a steam heater 20. The liquid is then fed into the settling tank 11 via a feed pump 19 for settling. The ratio of light phase material to heavy phase material is set at 7:3. The light phase material is fed into the light phase distillation column 13 through a heating furnace for distillation. The main product, refined asphalt, is obtained from the bottom of the light phase distillation column 13. The heavy phase material is fed into the heavy phase distillation column 15 through a heating furnace for distillation, thereby obtaining the by-products, medium-temperature asphalt and anthracene oil. The solvent obtained from the light phase distillation column 13 and the heavy phase distillation column 15 can be recovered and recycled.
[0034] When the quinoline insoluble content index of light phase materials fails to meet the standard:
[0035] The mixed solvent and raw asphalt are fed into settling buffer tank 10 at a 1:1 ratio. The mixture is stirred by a stirring device to ensure homogeneity. The liquid is then heated to 130°C by a steam heater 20 before entering settling tank 11 for sedimentation. The ratio of light phase material to heavy phase material is set at 7:3. After sampling and analysis, the quinoline insoluble content of the light phase material is found to be 1%. The light phase material is then returned to settling buffer tank 10 via the non-conforming material return pump 16. After mixing and heating by the stirring device and steam heater 20, it is reintroduced into settling tank 11 for sedimentation. Because the heavy phase system is still operating normally, the feed rate of raw asphalt and mixed solvent needs to be reduced. The total feed rate of raw asphalt and mixed solvent can be adjusted to match the flow rate of the heavy phase, thus maintaining a balanced liquid level in settling tank 11.
[0036] After the above adjustments, the raw material asphalt, mixed solvent, and substandard light phase mixed oil are remixed in settling buffer tank 10 and then enter settling tank 11 for settling. The sampling frequency is increased until the content of quinoline insoluble matter in the light phase mixed oil is qualified. Then, the light phase mixed oil is fed into the light phase heater 12 and then into the light phase distillation tower 13 for normal production. At the same time, the substandard material return pump is turned off, the return of light phase material to settling buffer tank 10 is stopped, and the feed rates of raw material asphalt and mixed solvent are adjusted to restore normal production.
[0037] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0038] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A coal-bearing needle coke settling buffer system, characterized in that, include: Settling buffer tank, settling tank, light phase heater, light phase distillation column, heavy phase heater, heavy phase distillation column and non-conforming material return pump; The settling buffer tank is equipped with a material inlet and a material outlet. The material outlet of the settling buffer tank is connected to the inlet of the feed pump, and the outlet of the feed pump is connected to the inlet of the settling tank. The settling buffer tank is equipped with a stirring device and a steam heater. The light phase material outlet of the settling tank is connected to the inlet of the light phase heater, and the outlet of the light phase heater is connected to the light phase distillation column. The heavy phase material outlet of the settling tank is connected to the inlet of the heavy phase heater, and the outlet of the heavy phase heater is connected to the heavy phase distillation column. The inlet and outlet of the non-conforming material return pump are respectively connected to the light phase material outlet of the settling tank and the material inlet of the settling buffer tank.
2. The coal-bearing needle coke settling buffer system according to claim 1, characterized in that, The stirring device includes a motor, a drive shaft, and a stirring paddle.
3. The coal-bearing needle coke settling buffer system according to claim 2, characterized in that, The steam heater is equipped with a steam inlet and a return water outlet.
4. The coal-bearing needle coke settling buffer system according to claim 3, characterized in that, The settling buffer tank is equipped with an exhaust port at the top.
5. A coal-bearing needle coke settling buffer system according to claim 1, characterized in that, Valves are installed at both the input and output ends of the non-conforming material return pump.