A production line and method for preparing asphalt from refined distillation residue

Abstract

The present invention provides a production line for preparing asphalt using refined distillation residue, which includes a screening machine, a hoist, a crusher, a dissolution kettle, a mixing tank, a filter, a gantry conveyor, a cracking device, a flue gas recovery tower, a cooling tank and a distillation tower. The present invention also provides a production method for preparing asphalt using refined distillation residue, which includes the following steps: S1, primary screening of raw materials; S2, pretreatment of raw materials; S3, dissolution and heating treatment; S4, secondary reaction treatment; S5, filtration and impurity removal treatment; S6, transportation and cracking treatment; S7, flue gas recovery and cooling treatment; S8, distillation treatment; The process method using this production line not only improves the output of asphalt, reduces resource consumption and environmental pollution, but also saves cost investment and personnel investment, realizing the full-automatic production and preparation of asphalt.

Description

Technical Field:

[0001] The present invention relates to the technical field of asphalt preparation, and particularly to a production line and method for preparing asphalt by using refined distillation residue. Background Art:

[0002] Refined distillation residue mainly comes from industries such as refined petroleum product manufacturing, coking, gas production and supply, basic chemical raw material manufacturing, common non-ferrous metal smelting, and environmental governance. It is mainly the residue or residual matter generated during the refining (distillation) process, such as acid tar, tar slag, etc. If directly discharged, it will cause irreparable impacts on the ecological environment. Currently, using refined distillation residue to prepare asphalt has become a method of resource recycling. However, in the prior art, the preparation of asphalt from coal slag by refined distillation generally adopts processes such as crushing - dissolving - extracting - filtering - cracking - distilling, etc. This preparation process not only has a small output of asphalt, but also has cumbersome process requirements and serious resource waste. Summary of the Invention:

[0003] In view of this, it is necessary to provide a production line and method for preparing asphalt by using refined distillation residue, aiming to improve the production output and efficiency of asphalt, reduce resource consumption, achieve automated production control, and improve the quality of asphalt.

[0004] A production line for preparing asphalt by using refined distillation residue includes a screening machine, a hoist, a crusher, a dissolving kettle, a mixing tank, a filter, a gantry conveyor, a cracking device, a flue gas recovery tower, a cooling tank, and a distillation tower. The upper part of the screening machine is connected to a raw material bin through a feed pipe, the bottom of the screening machine is connected to the hoist through a pipeline, the output end of the hoist is matched with the feed inlet of the crusher, the bottom of the crusher is connected to the dissolving kettle through a pipeline, the dissolving kettle is of a double-layer structure, and a heating coil is arranged between the inner walls. The dissolving kettle is connected to the mixing tank through a pipeline, the mixing tank is connected to the filter through a pipeline, the mixing tank and the filter are respectively installed on the same support, a gantry conveyor is arranged at the bottom of the filter, the gantry conveyor is connected to the cracking device, one end of the cracking device is matched with the flue gas recovery tower, the flue gas recovery tower is connected to the cooling tank, and one side of the cracking device is connected to the distillation tower through a pipeline.

[0005] Preferably, the screening machine is connected to a dehydration tank through a pipeline, and the dehydration tank is also connected to a liquid storage tank through a pipeline.

[0006] Preferably, a speed-regulating motor is arranged at the upper part of the dissolving kettle, a stirring shaft is arranged inside the dissolving kettle, the speed-regulating motor is connected to the stirring shaft, and a plurality of stirring paddles are arranged on the stirring shaft. An oil agent filling tank is also arranged on the dissolving kettle, and the oil agent filling tank is connected to the dissolving kettle through a pipeline.

[0007] Preferably, a catalytic injector is provided at the bottom of the mixing tank. The catalytic injector is connected to the mixing tank through a pipeline, and a pressure detector, a temperature detector and a hydrogen content detector are provided inside the mixing tank.

[0008] Preferably, a numerical control monitor is also provided on the bracket. The numerical control monitor is respectively connected to the pressure detector, the temperature detector and the hydrogen content detector.

[0009] Preferably, a nitrogen injector is also provided on the filter.

[0010] Preferably, the cracking device includes a base, a heating furnace, a cracking kettle and a driving gear. The heating furnace is provided on the upper part of the base. The cracking kettle is provided inside the heating furnace. One end of the cracking kettle is a feed inlet, and a driving gear is fixedly provided at the edge of the other end. The driving gear is connected to a power source, and the other end of the cracking kettle is connected to a flue gas recovery tower through a pipeline.

[0011] The present invention also provides a method for preparing asphalt by using refined distillation residue, which includes the following steps:

[0012] S1. Primary screening of raw materials: The refined distillation residue mixture in the raw material bin is subjected to solid-liquid separation by a screening machine. The separated liquid is transported to a dehydration tank through a pipeline for dehydration treatment. The dehydration temperature is 100°C - 180°C, and the dehydrated liquid is transported to a storage tank for storage.

[0013] S2. Pretreatment of raw materials: The solid mixture obtained by screening in step S1 is transported to a crusher through a hoist for crushing. The particle size after crushing is between 150 and 180 meshes.

[0014] S3. Dissolution and heating treatment: The crushed mixture is transported to a dissolution kettle, and an external steam generator is controlled to heat the heating coil. The heating temperature is 260°C - 280°C. During the heating process, the mixture is stirred, and a same-sex oil agent is added to the inside of the dissolution kettle through an oil agent filling tank to accelerate dissolution.

[0015] S4. Secondary reaction treatment: The dissolved mixture is transported to a mixing tank, and hydrogen is added to the mixing tank through a catalytic injector for catalytic reaction. The reaction environment inside the mixing tank is monitored in real time through a numerical control monitor.

[0016] S5. Filtration and impurity removal treatment: The mixture treated in step S4 is filtered and impurities are removed. Nitrogen is introduced into the filter through a nitrogen injector, and the temperature of the filter is between 35°C and 140°C. The main purpose is to extract solid ash.

[0017] S6. Transportation and cracking treatment: The extracted solid ash is transported into the cracking kettle through a gantry conveyor, and the cracking kettle is rotated and evenly heated under the action of a power source. The temperature in the cracking kettle is 800°C - 1200°C.

[0018] S7. Flue gas recovery and cooling treatment: The flue gas generated in the cracking kettle is collected through a flue gas recovery tower, and the flue gas recovery tower is cooled and temperature-reduced through a cooling tank.

[0019] S8. Distillation treatment: The solid after cracking is sent into a distillation tower for distillation treatment. After distillation treatment, light and heavy components can be obtained. The light and heavy components are separated, and the heavy component is asphalt, and the obtained light component is transported into a storage tank for storage.

[0020] Preferably, the temperature in the cracking kettle in step S6 is 1000°C - 1100°C.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention adopts a production line of a screening machine - elevator - crusher - dissolution kettle - mixing tank - filter - gantry conveyor - cracking device - flue gas recovery tower - cooling tank - distillation tower. Among them, the screening machine can be used for solid-liquid separation and recover the light components; the dissolution kettle can be filled with the same-sex oil agent by an oil agent filling tank, and the dissolution reaction can be accelerated during the stirring process.

[0023] 2. Secondly, a pressure detector, a temperature detector and a hydrogen content detector are arranged in the mixing tank. Under the action of a numerical control monitor, the reaction in the mixing tank can be monitored in real time and controlled at any time according to process requirements, and it is beneficial to safe production.

[0024] 3. The present invention not only improves the output of asphalt, reduces resource consumption and environmental pollution, but also saves cost investment and personnel investment, and realizes the full-automatic production and preparation of asphalt. Description of the drawings:

[0025] Figure 1 It is a production line for preparing asphalt by using refined distillation residue;

[0026] Figure 2 It is a process route for preparing asphalt by using refined distillation residue;

[0027] In the figure: screening machine 1, elevator 2, crusher 3, dissolving kettle 4, mixing tank 5, filter 6, gantry conveyor 7, cracking device 8, flue gas recovery tower 9, cooling tank 10, distillation column 11, heating coil 12, support 13, dehydration tank 14, speed regulating motor 15, stirring shaft 16, stirring paddle 17, oil agent filling tank 18, catalyst filling device 19, numerical control monitor 20, nitrogen filling device 21, base 80, heating furnace 81, cracking kettle 82 and driving gear 83. Detailed implementation method:

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1:

[0031] A production line for preparing asphalt using refined distillation residue, comprising a screening machine 1, a hoist 2, a crusher 3, a dissolving kettle 4, a mixing tank 5, a filter 6, a gantry conveyor 7, a cracking device 8, a flue gas recovery tower 9, a cooling tank 10 and a distillation column 11. The upper part of the screening machine 1 is connected to a raw material bin through a feed pipe, the bottom of the screening machine 1 is connected to the hoist 2 through a pipeline, the output end of the hoist 2 is matched with the feed inlet of the crusher 3, the bottom of the crusher 3 is communicated with the dissolving kettle 4 through a pipeline. The dissolving kettle 4 is of a double-layer structure, and a heating coil 12 is arranged between the inner walls. The heating coil 12 is connected to an external steam generator, and the temperature inside the dissolving kettle 4 can be controlled at any time. The dissolving kettle 4 is communicated with the mixing tank 5 through a pipeline, the mixing tank 5 is connected to the filter 6 through a pipeline, the mixing tank 5 and the filter 6 are respectively installed on the same bracket 13, a gantry conveyor 7 is arranged at the bottom of the filter 6, the gantry conveyor 7 is connected to the cracking device 8, one end of the cracking device 8 is matched with the flue gas recovery tower 9, the flue gas recovery tower 9 is communicated with the cooling tank 10, and one side of the cracking device 8 is connected to the distillation column 11 through a pipeline.

[0032] The screening machine 1 is connected to a dehydration tank 14 through a pipeline. The dehydration tank 14 mainly separates the water in the light components and stores the light components through a liquid storage tank for subsequent production use.

[0033] A speed regulating motor 15 is arranged at the upper part of the dissolving kettle 4, a stirring shaft 16 is arranged inside the dissolving kettle 4, the speed regulating motor 15 is connected to the stirring shaft 16, and a plurality of stirring paddles 17 are arranged on the stirring shaft 16. An oil agent filling tank 18 is also arranged on the dissolving kettle 4. The oil agent filling tank 18 is communicated with the dissolving kettle 4 through a pipeline. The oil agent filling tank 18 mainly fills an oil agent of the same nature according to the components of the mixture to facilitate dissolution and separation.

[0034] A catalytic injector 19 is arranged at the bottom of the mixing tank 5. The catalytic injector 19 is communicated with the mixing tank 5 through a pipeline, and a pressure detector, a temperature detector and a hydrogen content detector are arranged inside the mixing tank 5.

[0035] A numerical control monitor 20 is also arranged on the bracket 13. The numerical control monitor 20 is respectively connected to the pressure detector, the temperature detector and the hydrogen content detector. On the one hand, it can detect the working environment inside the mixing tank 5, and on the other hand, it can be controlled at any time to prevent accidents and improve the safety of the operation.

[0036] A nitrogen injector 21 is also arranged on the filter 6. Injecting nitrogen during the filtering process can be used to extract solid ash, and it is convenient for drying and impurity removal under the action of temperature.

[0037] The cracking device 8 includes a base 80, a heating furnace 81, a cracking kettle 82, and a driving gear 83. The heating furnace 81 is disposed on the upper part of the base 80. The cracking kettle 82 is disposed inside the heating furnace 81. One end of the cracking kettle 82 is a feed inlet, and a driving gear 83 is fixedly disposed at the edge of the other end. The driving gear 83 is connected to a power source, and the other end of the cracking kettle 83 is communicated with a flue gas recovery tower 9 through a pipeline.

[0038] The present invention also provides a method for preparing asphalt by using refined distillation residue, which includes the following steps:

[0039] S1. Primary screening of raw materials: The refined distillation residue mixture in the raw material bin is subjected to solid-liquid separation by a screening machine 1. The separated liquid is transported through a pipeline to a dehydration tank 14 for dehydration treatment. The dehydration temperature is 100°C - 180°C, and the dehydrated liquid is transported to a storage tank for storage.

[0040] S2. Pretreatment of raw materials: The solid mixture obtained by screening in step S1 is transported by a hoist 2 to a crusher 3 for crushing. The particle size after crushing is between 150 and 180 meshes.

[0041] S3. Dissolution and heating treatment: The crushed mixture is transported to a dissolution kettle 4, and an external steam generator is controlled to heat a heating coil 12. The heating temperature is 270°C. During the heating process, the mixture is stirred, and a same-sex oil agent is added to the inside of the dissolution kettle 4 through an oil agent filling tank 18 to accelerate dissolution.

[0042] S4. Secondary reaction treatment: The dissolved mixture is transported to a mixing tank 5, and hydrogen is added to the mixing tank 5 through a catalytic injector 19 for catalytic reaction. The reaction environment inside the mixing tank 5 is monitored in real time by a numerical control monitor 20.

[0043] S5. Filtration and impurity removal treatment: The mixture treated in step S4 is subjected to filtration and impurity removal. Nitrogen is introduced into the filter through a nitrogen injector 21, and the temperature of the filter 6 is 80°C. The main purpose is to extract solid ash.

[0044] S6. Transportation and cracking treatment: The extracted solid ash is transported by a gantry conveyor 7 to the cracking kettle 82, and the cracking kettle 82 is rotated and uniformly heated under the action of a power source. The temperature in the cracking kettle 82 is 900°C.

[0045] S7. Flue gas recovery and cooling treatment: The flue gas generated in the cracking kettle 82 is collected by a flue gas recovery tower 9, and the flue gas recovery tower 9 is cooled by a cooling tank 10.

[0046] S8. Distillation treatment: The solid after cracking is sent to the distillation column 11 for distillation treatment. After distillation treatment, light and heavy components can be obtained. The light and heavy components are separated, and the heavy component is asphalt, and the obtained light component is transported to the liquid storage tank for storage.

[0047] The temperature in the cracking kettle 82 in step S6 is 1000°C - 1100°C.

[0048] The penetration of the asphalt prepared by the process method of Example 1 is 72.1 - 76.8, the minimum ductility is 22, and the minimum softening point is 46. This asphalt is relatively soft and easy to dissolve.

[0049] Example 2:

[0050] The present invention also provides another method for preparing asphalt from refined distillation residue, including the following steps:

[0051] S1. Primary screening of raw materials: The mixture of refined distillation residue in the raw material bin is subjected to solid-liquid separation by a screening machine 1. The separated liquid is transported through a pipeline to a dehydration tank 14 for dehydration treatment. The dehydration temperature is 100°C - 180°C, and the dehydrated liquid is transported to a liquid storage tank for storage;

[0052] S2. Pretreatment of raw materials: The solid mixture obtained by screening in step S1 is transported to a crusher 3 by a hoist 2 for crushing, and the particle size after crushing is between 150 - 180 mesh;

[0053] S3. Dissolution and heating treatment: The crushed mixture is transported to a dissolution kettle 4, and the external steam generator is controlled to heat the heating coil 12. The heating temperature is 260°C

[0054] -280°C. During the heating process, the mixture is stirred, and a same-sex oil agent is added to the inside of the dissolution kettle 4 through an oil agent filling tank 18 to accelerate dissolution;

[0055] S4. Secondary reaction treatment: The dissolved mixture is transported to a mixing tank 5, and hydrogen is added to the mixing tank 5 through a catalytic injector 19 for catalytic reaction, and the reaction environment in the mixing tank 5 is monitored in real time by a numerical control monitor 20;

[0056] S5. Filtration and impurity removal treatment: The mixture treated in step S4 is filtered and the impurities are removed. Nitrogen is flushed into the filter through a nitrogen injector 21, and the temperature of the filter 6 is 120°C. Its main purpose is to extract solid ash;

[0057] S6. Transportation and cracking treatment: The extracted solid ash is transported to a cracking kettle 82 by a gantry conveyor 7, and the cracking kettle 82 is rotated and evenly heated under the action of a power source. The temperature in the cracking kettle 82 is 1200°C;

[0058] S7. Flue gas recovery and cooling treatment: The flue gas generated in the cracking kettle 82 is collected through the flue gas recovery tower 9, and the flue gas recovery tower 9 is cooled by the cooling tank 10.

[0059] S8. Distillation treatment: The solid after cracking is sent into the distillation tower 11 for distillation treatment. After distillation treatment, light and heavy components can be obtained. The light and heavy components are separated to obtain the heavy component, which is asphalt, and the obtained light component is transported to the liquid storage tank for storage.

[0060] The temperature in the cracking kettle 82 in the step S6 is 1000°C - 1100°C.

[0061] The penetration of the asphalt prepared by the process method of Example 1 is 80 - 100, the minimum ductility is 46, and the minimum softening point is 45. This asphalt has good viscosity and is not easily soluble.

[0062] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A production method for preparing asphalt using refined distillation residue, characterized in that, It includes the following steps: S1. Primary screening of raw materials: The refined distillation residue mixture in the raw material bin is subjected to solid-liquid separation through a screening machine (1). The separated liquid is transported through a pipeline to a dehydration tank (14) for dehydration treatment. The dehydration temperature is 100°C - 180°C, and the dehydrated liquid is transported to a liquid storage tank for storage; S2. Pretreatment of raw materials: The solid mixture obtained by screening in step S1 is transported through a hoist (2) to a crusher (3) for crushing, and the particle size after crushing is between 150 - 180 mesh; S3. Dissolution and heating treatment: The crushed mixture is transported into a dissolution kettle (4), and the external steam generator is controlled to heat the heating coil (12). The heating temperature is 260°C - 280°C. During the heating process, the mixture is stirred, and a same-sex oil agent is added into the dissolution kettle (4) through an oil agent filling tank (18) to accelerate dissolution; S4. Secondary reaction treatment: The dissolved mixture is transported to a mixing tank (5), and hydrogen is added into the mixing tank (5) through a catalytic injector (19) for catalytic reaction, and the reaction environment in the mixing tank (5) is monitored in real time through a numerical control monitor (20); S5. Filtration and impurity removal treatment: The mixture treated in step S4 is filtered and the impurities are removed. Nitrogen is flushed into the filter through a nitrogen injector (21), and the temperature of the filter (6) is between 35°C - 140°C. Its main purpose is to extract solid ash; S6. Transportation and cracking treatment: The extracted solid ash is transported into a cracking kettle (82) through a gantry conveyor (7), and the cracking kettle (82) is rotated and uniformly heated under the action of a power source. The temperature in the cracking kettle (82) is 800°C - 1200°C; S7. Flue gas recovery and cooling treatment: The flue gas generated in the cracking kettle (82) is collected through a flue gas recovery tower (9), and the flue gas recovery tower (9) is cooled through a cooling tank (10); S8. Distillation treatment: The solid after cracking is sent into a distillation tower (11) for distillation treatment. After distillation treatment, light and heavy components can be obtained. The light and heavy components are separated, and the heavy component is asphalt, and the obtained light component is transported to a liquid storage tank for storage.

2. A production method for preparing asphalt using refined distillation residue according to claim 1, characterized in that: The temperature in the cracking kettle (82) in step S6 is 1000°C - 1100°C.

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