Solid asphalt softening device matched with heavy oil conversion process

Abstract

The utility model relates to the technical field of petrochemical engineering, and particularly discloses a solid asphalt softening device matched with a heavy oil conversion process, which comprises a solid asphalt conveyor, a solid asphalt crusher, an asphalt heating tank, a stirring assembly and a heating assembly, the asphalt heating tank is communicated with an outlet of the solid asphalt crusher, the stirring assembly and the heating assembly are both arranged on the asphalt heating tank, and the heating assembly comprises a grate plate heater, an internal heater and an interlayer heater. Through three heating modes of the grate plate heater, the internal heater and the interlayer heater, no heating dead angle exists in the asphalt heating tank, the melting temperature can be reached more quickly, solid asphalt is heated more uniformly through uniform rotation of the stirrer and the raking device paddle, the interlayer heater can heat the asphalt heating tank, and the heating efficiency of the asphalt heating tank is improved. The tank wall can be subjected to heat preservation, and the asphalt softening effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to a solid asphalt softening device used in a heavy oil conversion process. Background Art

[0002] Petroleum asphalt is the residue after crude oil distillation. Its main components are oil, resin and asphaltenes, asphalt carbon, carbon-like substances, wax and heavy metal residues. Petroleum asphalt is a black or dark brown viscous liquid, semi-solid or solid at room temperature. Its properties and composition vary with the source of crude oil and the production method. These substances are more or less harmful to human health. With the growth of the domestic petrochemical industry, the domestic petroleum asphalt is generally in surplus.

[0003] Under the global green, low-carbon and environmental protection requirements, and in order to reduce refining costs and project construction costs, petroleum asphalt needs to be recycled and softened. The asphalt softening devices in the existing technology mostly use the method of heating the asphalt in the storage tank. However, the existing heating method has low heating efficiency and uneven heating. Part of the asphalt is first liquefied by heating, resulting in the mixing of solid asphalt and liquid asphalt in the storage tank. If it continues to be heated, it will cause asphalt aging, affecting the effect and efficiency of asphalt softening recovery.

[0004] Therefore, it is necessary to propose an improved solid asphalt softening device for use in a heavy oil conversion process to overcome the defects of the existing technology. Utility Model Content

[0005] The purpose of the utility model is to solve the problems in the prior art and provide a solid asphalt softening device for use in a heavy oil conversion process.

[0006] The technical solution of the utility model is:

[0007] A solid asphalt softening device for use in a heavy oil conversion process includes a solid asphalt conveyor, a solid asphalt crusher, an asphalt heating tank, a stirring assembly and a heating assembly. The solid asphalt crusher is arranged at the end of the solid asphalt conveyor, and the asphalt heating tank is connected to the outlet of the solid asphalt crusher through a conveying pipeline. The stirring assembly and the heating assembly are both arranged on the asphalt heating tank. The heating assembly includes a grate plate heater, an internal heater and an interlayer heater. The grate plate heater is arranged at the inner top end of the asphalt heating tank, the internal heater is arranged in the asphalt heating tank, and the interlayer heater is arranged on the tank wall of the asphalt heating tank. The inlet end of the grate plate heater is connected to the inlet end of the interlayer heater, the outlet end of the grate plate heater is connected to the inlet end of the internal heater, and the outlet end of the internal heater is connected to the outlet end of the interlayer heater.

[0008] Preferably, the stirring assembly includes an agitator and a stirring motor. The stirring motor is arranged on the top outer wall of the asphalt heating tank, and the agitator is arranged inside the asphalt heating tank. The agitator is connected to the stirring motor through a transmission. The agitator is provided with alternatingly distributed rake blades, and the rake blades are installed at an inclination angle, and the inclination angle is between 30 degrees and 75 degrees.

[0009] Preferably, the solid asphalt crusher is driven by a crushing motor.

[0010] Preferably, a plurality of delivery pipelines are provided, each of which is connected in series with at least two gas protection valves, and a nitrogen pipeline is connected to the end of the delivery pipeline close to the asphalt heating tank.

[0011] Preferably, the grate plate heater is configured as a multi-layer structure, the interlayer heater is configured as a coil structure, and the internal heater is configured as an annular cavity integrated structure.

[0012] Preferably, a heating medium inlet pipeline and a heating medium outlet pipeline are provided on the asphalt heating tank. The heating medium inlet pipeline is connected to the inlet end of the grate plate heater. A bypass pipeline is connected in parallel to the heating medium inlet pipeline. The bypass pipeline is connected to the inlet end of the interlayer heater. The outlet end of the interlayer heater and the outlet end of the internal heater are combined and connected to the heating medium outlet pipeline.

[0013] Preferably, a pump feed pipeline is provided at the bottom of the asphalt heating tank, the pump feed pipeline is connected to the inlet of the liquid asphalt delivery pump, and a pump discharge pipeline is provided at the outlet of the liquid asphalt delivery pump, and the pump discharge pipeline is connected to the residual oil system.

[0014] Preferably, the grate plate heater is arranged in the asphalt heating tank through a plurality of fixed supports.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model ensures that there is no heating dead corner in the asphalt heating tank through the combination of the grate plate heater, the internal heater and the interlayer heater, so as to achieve the melting temperature faster with less resource occupation, and stirs the material through the uniform rotation of the agitator and the rake blades, so that the solid asphalt is heated more evenly and the softening efficiency is high. The interlayer heater can heat the asphalt heating tank and also insulate the tank wall of the asphalt heating tank, further improving the asphalt softening efficiency, realizing the recycling of asphalt, and converting hazardous waste into clean energy. The solid asphalt is heated and softened into liquid asphalt, which is convenient for transportation and recycling, can realize resource reuse and reduce production costs, save a lot of materials and funds, reduce waste treatment costs, and promote ecological environmental protection. The overall operation is simple and reliable, and continuous operation can be achieved. The softening process is carried out in the asphalt heating tank, which is closed and non-toxic, saving production time and reducing pollution to the environment, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model.

[0018] Among them, 1. Solid asphalt conveyor; 2. Solid asphalt crusher; 3. Crushing motor; 4. Asphalt heating tank; 5. Conveying pipeline; 6. Gas protection valve; 7. Nitrogen pipeline; 8. Grate plate heater; 9. Fixed support; 10. Internal heater; 11. Interlayer heater; 12. Heating medium inlet pipeline; 13. Heating medium outlet pipeline; 14. Bypass pipeline; 15. Agitator; 16. Agitator motor; 17. Rake blade; 18. Pump feed pipeline; 19. Pump discharge pipeline; 20. Liquid asphalt conveying pump; 21. Residue oil system. DETAILED DESCRIPTION

[0019] In order to make the technical means, technical features, purpose of the utility model and technical effects achieved by the utility model easier to understand, the utility model is further explained below with reference to specific illustrations.

[0020] like Figure 1 As shown, a solid asphalt softening device for supporting heavy oil conversion process includes a solid asphalt conveyor 1, a solid asphalt crusher 2, an asphalt heating tank 4, a stirring component and a heating component. The solid asphalt conveyor 1 is used for conveying solid asphalt. The solid asphalt crusher 2 is located at the end of the solid asphalt conveyor 1. The solid asphalt is transported by the solid asphalt conveyor 1 into the solid asphalt crusher 2 for crushing, reducing the overall size, which is conducive to heating and softening. The asphalt crusher is driven by a crushing motor 3 to work. The solid asphalt crusher 2 is connected to the interior of the asphalt heating tank 4 through a conveying pipeline 5, and the crushed solid asphalt is transported to the asphalt heating tank 4. The stirring component and the heating component are both installed on the asphalt heating tank 4. The stirring component is used to achieve uniform stirring to ensure uniform heating of the asphalt. The heating component is used to achieve melting and continuous heating and softening of the solid asphalt, thereby improving the asphalt liquefaction effect.

[0021] like Figure 1As shown, the heating assembly includes a grate plate heater 8, an internal heater 10 and a sandwich heater 11. The grate plate heater 8 is installed at the internal top end of the asphalt heating tank 4 and is connected to the asphalt heating tank 4 through a plurality of fixed supports 9. The grate plate heater 8 can adopt a multi-layer structure. The number of layers of the grate plate heater 8 and the spacing between each layer can be set according to actual needs. Heat exchange is carried out by heat conduction, so that the solid asphalt is heated and melted on the surface of the grate plate heater 8. The internal heater 10 is installed in the interior of the asphalt heating tank 4 in an annular cavity-type integrated layout. To ensure the heating effect, the internal heater 10 needs to extend as far as possible to the bottom end of the asphalt heating tank 4 to achieve continuous heating of the interior of the asphalt heating tank 4. The sandwich heater 11 is connected to the tank wall of the asphalt heating tank 4. The sandwich heater 11 is a coil structure, or is installed inside the tank wall or on the outer wall of the shell of the asphalt heating tank 4, and is evenly and reasonably distributed to achieve insulation of the outer layer of the asphalt heating tank 4 and heating of the inner layer. The heating medium adopts heat-conducting oil or steam, and self-flow is achieved through pressure.

[0022] A heating medium inlet pipeline 12 and a heating medium outlet pipeline 13 are installed on the asphalt heating tank 4. A bypass pipeline 14 is connected in parallel to the heating medium inlet pipeline 12. The heating medium inlet pipeline 12 is connected to the inlet end of the grate plate heater 8, and the bypass pipeline 14 is connected to the inlet end of the interlayer heater 11. The heating medium enters the grate plate heater 8 through the heating medium inlet pipeline 12. At the same time, the heating medium enters the interlayer heater 11 through the bypass pipeline 14. The outlet end of the grate plate heater 8 is connected to the inlet end of the internal heater 10. After flowing through the grate plate heater 8, the heating medium enters the internal heater 10. The outlet end of the interlayer heater 11 and the outlet end of the internal heater 10 are combined and connected to the heating medium outlet pipeline 13 to realize the circulation of the heating medium.

[0023] like Figure 1 As shown, the stirring assembly includes an agitator 15 and a stirring motor 16. The stirring motor 16 is installed on the top outer wall of the asphalt heating tank 4. The agitator 15 is located inside the asphalt heating tank 4. One end of the agitator 15 is connected to the stirring motor 16, and the stirring motor 16 drives the agitator 15 to rotate. The other end of the agitator 15 extends to the bottom end of the asphalt heating tank 4 as much as possible to expand its stirring range. Multiple layers of alternately distributed rake blades 17 are installed on the agitator 15. The edges of the rake blades 17 extend toward the heating tube direction of the annular cavity internal heater 10. The rake blades 17 are installed at an inclined angle on the agitator 15. The inclination angle is between 30 degrees and 75 degrees, which facilitates the stirring of the asphalt.

[0024] like Figure 1It is shown that the number of delivery pipelines 5 can be set to multiple according to actual consumption to realize multiple, multi-channel feeding lines. At least two gas protection valves 6 are connected in series on each delivery pipeline 5. In the process of asphalt being heated, hydrocarbon volatiles will be generated, which are protected and isolated by the gas protection valve 6. The series-connected gas protection valves 6 provide double protection to improve reliability and safety. A nitrogen pipeline 7 is externally connected to the end of the delivery pipeline 5 near the asphalt heating tank 4. When the asphalt heating tank 4 is heated to generate volatile components, nitrogen is introduced into the delivery pipeline 5 through the nitrogen pipeline 7, which can effectively isolate the hydrocarbons from rising and can also produce a cooling effect on the pipe wall of the delivery pipeline 5 to prevent the high-temperature volatile components from adhering to the asphalt on the pipe wall of the delivery pipeline 5.

[0025] like Figure 1 As shown, a pump feed pipeline 18 is installed at the bottom of the asphalt heating tank 4, and the pump feed pipeline 18 is connected to the inlet of the liquid asphalt delivery pump 20. A pump discharge pipeline 19 is installed at the outlet of the liquid asphalt delivery pump 20, and the pump discharge pipeline 19 is connected to the residual oil system 21. The heated and softened liquid asphalt is extracted by the liquid asphalt delivery pump 20 and delivered to the residual oil system 21 for reuse.

[0026] The working principle of this utility model is:

[0027] During use, large pieces of solid asphalt are transferred to the solid asphalt crusher 2 by the solid asphalt conveyor 1, and the crushing motor 3 drives the solid asphalt crusher 2 to work, crushing the solid asphalt and then entering the asphalt heating tank 4 through the conveying pipeline 5. The crushed solid asphalt first falls on the grate plate heater 8, is heated and melted by the grate plate heater 8, and then falls into the asphalt heating tank 4. The stirring motor 16 is started, and the stirring motor 16 drives the stirrer 15 and the rake blade 17 to rotate. The outer layer of the asphalt heating tank 4 is insulated and the inner layer is heated by the interlayer heater 11, and the internal heater 10 is continuously heated. Combined with the uniform stirring of the stirrer 15 and the rake blade 17, the asphalt is heated evenly, accelerating the softening and liquefaction of the solid asphalt. The liquefied liquid asphalt is conveyed by the liquid asphalt conveying pump 20 to the residual oil system 21 for reuse, so as to improve the utilization efficiency of heavy oil resources, realize the conversion from hazardous waste to clean energy, reduce energy consumption and environmental pollution, have important economic and social significance, and have broad application prospects.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. In other words, any equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A solid asphalt softening device for use in a heavy oil conversion process, characterized by: The invention comprises a solid asphalt conveyor (1), a solid asphalt crusher (2), an asphalt heating tank (4), a stirring assembly and a heating assembly, wherein the solid asphalt crusher (2) is arranged at the end of the solid asphalt conveyor (1), the asphalt heating tank (4) is connected to the outlet of the solid asphalt crusher (2) through a conveying pipeline (5), the stirring assembly and the heating assembly are both arranged inside the asphalt heating tank (4), and the heating assembly comprises a grate plate heater (8), an internal heater (10) and an interlayer heater (11), the grate plate heater (8) is arranged at the top end inside the asphalt heating tank (4), the internal heater (10) is arranged inside the asphalt heating tank (4), the interlayer heater (11) is arranged on the tank wall of the asphalt heating tank (4), the inlet end of the grate plate heater (8) is connected to the inlet end of the interlayer heater (11), the outlet end of the grate plate heater (8) is connected to the inlet end of the internal heater (10), and the outlet end of the internal heater (10) is connected to the outlet end of the interlayer heater (11).

2. The solid asphalt softening device for heavy oil conversion process according to claim 1, characterized in that: The stirring assembly includes a stirrer (15) and a stirring motor (16), wherein the stirring motor (16) is arranged on the top outer wall of the asphalt heating tank (4), and the stirrer (15) is arranged in the asphalt heating tank (4). The stirrer (15) is connected to the stirring motor (16) by transmission, and the stirrer (15) is provided with alternately distributed rake blades (17), and the rake blades (17) are installed at an inclined angle, and the inclination angle is between 30 degrees and 75 degrees.

3. The solid asphalt softening device for heavy oil conversion process according to claim 1, characterized in that: The solid asphalt crusher (2) is driven by a crushing motor (3).

4. The solid asphalt softening device for heavy oil conversion process according to claim 1, characterized in that: The delivery pipelines (5) are provided in plurality, each of which is connected in series with at least two gas protection valves (6), and the end of the delivery pipeline (5) close to the asphalt heating tank (4) is connected to a nitrogen pipeline (7).

5. The solid asphalt softening device for heavy oil conversion process according to claim 1, characterized in that: The grate plate heater (8) is configured as a multi-layer structure, the interlayer heater (11) is configured as a coil structure, and the internal heater (10) is configured as an annular cavity integrated structure.

6. The solid asphalt softening device for use in a heavy oil conversion process according to claim 1, characterized in that: The asphalt heating tank (4) is provided with a heating medium inlet pipeline (12) and a heating medium outlet pipeline (13), wherein the heating medium inlet pipeline (12) is connected to the inlet end of the grate plate heater (8), and a bypass pipeline (14) is connected in parallel to the heating medium inlet pipeline (12), wherein the bypass pipeline (14) is connected to the inlet end of the interlayer heater (11), and the outlet end of the interlayer heater (11) and the outlet end of the internal heater (10) are combined and connected to the heating medium outlet pipeline (13).

7. The solid asphalt softening device for use in a heavy oil conversion process according to claim 1, characterized in that: A pump feed pipeline (18) is provided at the bottom of the asphalt heating tank (4), and the pump feed pipeline (18) is connected to the inlet of the liquid asphalt delivery pump (20). A pump discharge pipeline (19) is provided at the outlet of the liquid asphalt delivery pump (20), and the pump discharge pipeline (19) is connected to the residual oil system (21).

8. The solid asphalt softening device for heavy oil conversion process according to claim 1, characterized in that: The grate plate heater (8) is arranged in the asphalt heating tank (4) via a plurality of fixed supports (9).

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