A method for preparing coal liquefaction oil residue asphalt modifier

Abstract

The invention discloses a method for preparing a coal liquefaction oil residue asphalt modifier, and relates to the technical field of asphalt modifiers. In order to solve the problem of low preparation efficiency caused by long mixing time of an ordinary high-speed stirring mechanism, a pre-prepared mixed main material, a polymer and an additive are respectively added into a feeding mechanism, a primary mixing mechanism is started to drive the mixed main material to fall, and then the polymer is driven to fall to the upper layer of the mixed main material, and then the additive falls into the gap between the mixed main material and the polymer. After the mixed raw materials fall from a conveyor belt, they pass through an input port of a supporting casing and fall into a cavity corresponding to an auger blade. The mixing temperature in the cavity corresponding to the auger blade is 130-170°C, and a discharging port is opened to discharge the materials after mixing for 0.3-0.8 hours. Different raw materials are laid and mixed layer by layer to achieve layer-by-layer superposition of different raw materials, with a small amount of accumulation of a single raw material, thereby greatly improving the mixing effect.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt modifiers, and in particular to a method for preparing a coal liquefaction oil residue asphalt modifier. Background Art

[0002] The preparation of coal liquefaction oil residue asphalt modifier mainly includes the following steps. First, select suitable coal tar and coal liquefaction residue as the main components, and prepare polymers and additives at the same time. Preliminary mixing and stirring of coal tar and coal liquefaction residue at a certain temperature, then add naphtha and continue stirring. Then high-speed shear treatment is carried out to refine and evenly disperse the components at a specific shear rate and temperature. The product is collected in the post-processing stage and can be crushed if necessary. Finally, the prepared modifier is subjected to quality inspection and performance evaluation. During the preparation process, the quality and proportion of raw materials must be strictly controlled, the process parameters must be optimized, safety must be paid attention to, and the modifier must meet the standards. The modifier can improve the road performance of petroleum asphalt, improve high temperature stability and low temperature crack resistance, etc., to meet the needs of road engineering.

[0003] The existing announcement number is CN110358317A, which is a road asphalt modifier, and its preparation method and application. Coal tar and coal liquefaction residue are mixed according to a measured mass percentage, fully stirred at 140°C-170°C for 0.5h-1.5h, and then a measured amount of naphtha is added, and stirring is continued for 0.5h-1.5h. Then, it is sent to a high-speed shearing machine at a shear rate of 3000-5000r / min and a shear temperature of 150°C-180°C for shearing for 0.5h-1.5h to obtain a road asphalt modifier; the composition and content of the road asphalt modifier are: 10%-55%wt of coal tar, 10%-30%wt of coal liquefaction residue, and the remainder is an additive naphtha.

[0004] However, the above-mentioned prior art has the problem that the raw materials are put into a high-speed stirring mechanism for mixing together. In order to achieve the best mixing uniformity, mixing is required for 1-2 hours, resulting in the entire preparation time being too long, the efficiency being too low, and the mixing effect being not significant. There is still the problem of some raw materials such as coal tar or coal liquefaction residue or polymer being clumped together.

[0005] Therefore, a method for preparing a coal liquefaction oil residue asphalt modifier is needed. Summary of the invention

[0006] In order to solve all or part of the above problems, the present invention aims to provide a method for preparing a coal liquefaction oil residue asphalt modifier, so as to solve the problem of low preparation efficiency caused by long mixing time of ordinary high-speed stirring mechanisms.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for preparing a coal liquefaction oil residue asphalt modifier, comprising the following steps:

[0008] S1: filtering or centrifuging the coal liquefaction oil residue for purification, and drying the purified oil residue at 80-120° C. to remove moisture from the oil residue;

[0009] S2: putting the dried coal liquefaction oil residue into a pyrolysis furnace for pyrolysis treatment, the pyrolysis temperature is 300-600°C, the pyrolysis atmosphere is nitrogen or inert gas, the pyrolysis product is activated, and the activated liquefied oil residue residue is mixed with coal tar and crushed into particles to prepare a mixed main material of liquefied oil residue residue and coal tar;

[0010] S3: Add the pre-prepared mixed main material, polymer and additive into the feeding mechanism respectively, start the primary mixing mechanism to drive the mixed main material to fall, then drive the polymer to fall to the upper layer of the mixed main material, and then the additive falls into the gap between the mixed main material and the polymer to mix;

[0011] S4: conveying the flat-laying superimposed mixed material to a secondary mixing mechanism, which performs secondary mixing and conveying at the same time, at which time naphtha is added thereto, and conveying the mixed material to a shearing machine for shearing;

[0012] S5: The finished material sheared by the shearing machine is crushed and pre-treated to make the particles of the finished material uniform, thereby completing the preparation of the coal liquefaction oil residue asphalt modifier.

[0013] Furthermore, the polymer is one of styrene-butadiene-styrene block copolymer and ethylene-vinyl acetate copolymer.

[0014] Furthermore, the ratio of the mixed main material to the polymer is 3:1.

[0015] Furthermore, the additive is one of an antioxidant and a light stabilizer.

[0016] Furthermore, the ratio of the mixed main material to the polymer to the additive is 3:1:0.1.

[0017] Furthermore, the specific steps of S3 are as follows:

[0018] S31: First, the mixed main material is conveyed into the mixed main material feeding component, the polymer is conveyed into the polymer feeding component, and the additive is conveyed into the additive feeding component;

[0019] S32: Then start the private service motor 1 to drive the driving roller to rotate, thereby driving the conveyor belt to rotate and driving the teeth to rotate. At this time, the teeth drive the transmission gear to rotate, and the transmission gear drives the conveying blades to rotate. The conveying blades corresponding to the mixed main material feeding assembly evenly lay the mixed main material on the bottom of the conveyor belt;

[0020] S33: When the mixed main material at the bottom moves to the lower end of the polymer feeding assembly, the conveying blades similarly spread the polymer evenly on the upper layer of the mixed main material or partially fall into the gaps of the mixed main material;

[0021] S34: When the mixed main material and the polymer mixture move to the lower end of the additive feeding assembly, the conveying blades convey the additive to the gap between the mixed main material and the polymer to complete the preliminary mixing.

[0022] Furthermore, in S32, when the transmission gear drives the conveying blade to discharge the material, the cooperation between the protrusion and the groove makes the protrusion move to correspond with the ball, which pushes the disperser plate to move in the direction of the reset spring. When the groove corresponds with the ball, the disperser plate is reset under the effect of the reset spring. As the transmission gear continues to rotate, the disperser plate presents reciprocating motion, so that the discharged raw materials are dispersed by the disperser plate.

[0023] Furthermore, in S3, when the conveyor belt rotates, the teeth will drive the transmission tooth head to rotate. At this time, the reset torsion spring is twisted and compressed, and the auxiliary claw rotates. As the teeth continue to rotate, the transmission tooth head will separate from the corresponding teeth. At this time, the reset torsion spring resets and drives the auxiliary claw to reset. The auxiliary claw knocks on the raw material that has been unloaded and is inserted.

[0024] Furthermore, the specific steps of S4 are as follows:

[0025] S41: The mixed raw materials fall from the conveyor belt through the input port of the supporting housing and fall into the cavity corresponding to the auger blade, and the private service motor 2 drives the auger blade to rotate;

[0026] S42: the mixing temperature in the cavity corresponding to the auger blade is 130-170° C. and the mixing time is 0.3-0.8 hours;

[0027] S43: After the mixing is completed, the discharge port of the supporting casing is opened to discharge the materials and transport them to the shearing machine.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention proposes a method for preparing a coal liquefaction oil residue asphalt modifier, which comprises the following steps: adding a pre-prepared mixed main material, a polymer and an additive into a feeding mechanism respectively, starting a first-level mixing mechanism to drive the mixed main material to fall, and then driving the polymer to fall to the upper layer of the mixed main material, and then the additive falls into the gap between the mixed main material and the polymer to mix the materials. After the mixed raw materials fall from a conveyor belt, they pass through an input port of a supporting casing and fall into a cavity corresponding to an auger blade. The mixing temperature in the cavity corresponding to the auger blade is 130-170°C, and the discharge port is opened to discharge the materials after mixing for 0.3-0.8 hours. By laying and mixing different raw materials layer by layer, different raw materials are stacked layer by layer, and the accumulation of a single raw material is small, thereby greatly improving the mixing effect, shortening the general mixing time, and thereby improving the preparation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic flow chart of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention;

[0031] Figure 2 The overall three-dimensional structure of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention is shown in FIG. Figure 2 ;

[0032] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the main casing after the feeding mechanism, the primary mixing mechanism and the secondary mixing mechanism of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention are combined;

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of the uniform conveying and mixing assembly of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention;

[0034] Figure 5 It is a schematic diagram of the three-dimensional structure of the mixed main material feeding assembly of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention;

[0035] Figure 6 It is a schematic diagram of the cutaway three-dimensional structure of the mixed main material feeding assembly of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention;

[0036] Figure 7 It is a schematic diagram of the three-dimensional structure of the dispersed components of the method for preparing the coal liquefaction oil residue asphalt modifier of the present invention;

[0037] Figure 8 The present invention is a method for preparing a coal liquefaction oil residue asphalt modifier Figure 5 A schematic diagram of the enlarged structure at point A;

[0038] Fig. 9 The present invention is a method for preparing a coal liquefaction oil residue asphalt modifier Figure 4 Schematic diagram of the enlarged structure at B.

[0039] In the figure:

[0040] 1. Mixing main material feeding assembly; 11. Temporary storage box; 12. Discharge box; 13. Discharge shell; 131. Slide; 14. Conveying blade; 15. Transmission gear; 151. Bump; 152. Groove; 16. Dispersion assembly; 161. Dispersion plate; 162. Transmission column; 164. Reset spring; 163. Ball; 2. Polymer feeding assembly; 3. Additive feeding assembly; 4. Main housing; 5. Conveying uniform mixing assembly; 51. Private service motor 1; 52. Driving roller; 53. Conveyor belt; 531. Teeth; 6. Auxiliary mixing assembly; 61. Transmission tooth head; 62. Center column; 63. Auxiliary claw; 64. Reset torsion spring; 7. Support housing; 8. Auger mixing and conveying assembly; 81. Private service motor 2; 82. Auger blade. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figure 1 As shown, a method for preparing a coal liquefaction oil residue asphalt modifier comprises the following steps:

[0043] Step 1: Filter or centrifuge the coal liquefaction oil residue to purify it. Filters with different apertures can be used for filtration, and the appropriate filter specifications are selected according to the size of the impurities. Centrifugal separation uses the centrifugal force to separate solid particles from the oil residue, with the purpose of refining high-quality oil residue. The purified oil residue is dried at 80-120℃ to remove moisture from the oil residue. Too low a temperature may result in incomplete removal of moisture, while too high a temperature may cause thermal decomposition or deterioration of the oil residue. The drying process can be done by hot air drying, vacuum drying, etc.

[0044] Step 2: Put the dried coal liquefaction oil residue into a pyrolysis furnace for pyrolysis treatment, the pyrolysis temperature is 300-600℃, lower pyrolysis temperature may lead to incomplete pyrolysis of oil residue, while too high pyrolysis temperature may cause excessive decomposition of oil residue or produce harmful gas, pyrolysis atmosphere is selected nitrogen or inert gas, such as argon, etc. These gases can prevent the oil residue from oxidation reaction during the pyrolysis process, ensure the quality of pyrolysis products, activate the pyrolysis products, and mix the activated liquefied oil residue residue with coal tar and crush them into particles to make a mixed main material of liquefied oil residue residue and coal tar.

[0045] Step 3: If Figure 1-Figure 6 As shown, the pre-prepared mixed main material, polymer and additive are added to the feeding mechanism respectively. The polymer is used to improve the elasticity, toughness and anti-aging performance of asphalt, such as styrene-butadiene-styrene block copolymer SBS, ethylene-vinyl acetate copolymer EVA and other polymers. The ratio of mixed main material to polymer and additive is 3:1:0.1. For pavement in high temperature areas, polymers with higher heat resistance can be preferred; for cold areas, the low temperature elasticity of polymers should be considered. Start the first-level mixing mechanism to drive the coal liquefaction oil residue to fall, and then drive the polymer to fall to the upper layer of the coal liquefaction oil residue, and then the additive falls into the gap between the coal liquefaction oil residue and the polymer for mixing. The additive is a stabilizer, such as an antioxidant, a light stabilizer, etc., which can prevent the modifier from aging and degradation during storage and use. Antioxidants can inhibit the occurrence of oxidation reactions and extend the service life of the modifier; light stabilizers can reduce the damage of ultraviolet rays to the modifier.

[0046] The feeding mechanism is composed of a mixed main material feeding component 1, a polymer feeding component 2 and an additive feeding component 3. The additive may be a compatibilizer or a stabilizer. The mixed main material feeding component 1, the polymer feeding component 2 and the additive feeding component 3 have the same structural composition.

[0047] The mixed main material feeding assembly 1 includes a temporary storage box 11 and a discharge box 12 installed at the lower end of the temporary storage box 11. The two sides of the lower end of the temporary storage box 11 are fixedly connected to the main housing 4 by screws. The discharge box 12 is located on the inner side of the main housing 4, and the discharge box 12 is funnel-shaped when viewed from the side. A discharge shell 13 is installed at the output end of the discharge box 12. A conveying blade 14 is arranged on the inner side of the discharge box 12 located at the upper end of the discharge shell 13. The conveying blade 14 matches the inner side of the lower end of the discharge box 12. Both ends of the conveying blade 14 are rotatably connected to the discharge box 12 and pass through the discharge box 12. A transmission gear 15 is installed at the end of the conveying blade 14 located on the outer side of the discharge box 12, and the transmission gear 15 is meshed with the teeth 531.

[0048] The primary mixing mechanism is composed of a main housing 4 and a uniform conveying and mixing component 5. The uniform conveying and mixing component 5 includes a private service motor 51 and a driving roller 52 installed at the driving end of the private service motor 51. The private service motor 51 is fixedly installed on one side of the main housing 4. The end of the driving roller 52 away from the private service motor 51 is rotatably connected to the inner side of the main housing 4. The driving roller 52 is located at each end of the inner side of the main housing 4, one of which is connected to the driving end of the private service motor 51, and the two ends of the other are rotatably connected to the main housing 4. A conveyor belt 53 is commonly sleeved on the outer side of the two driving rollers 52. The conveyor belt 53 is arranged in a shape of low in the middle and high on both sides, and a plurality of teeth 531 are arranged on both sides of the conveyor belt 53.

[0049] First, the mixed main material is conveyed into the mixed main material feeding component 1, and the polymer is conveyed into the polymer feeding component 2. The coal liquefaction oil residue and the polymer are both in granular form. The additive is conveyed into the additive feeding component 3, and then the private service motor 51 is started to drive the driving roller 52 to rotate, thereby driving the transmission belt 53 to rotate and driving the gear 531 to rotate, and the upper end of the transmission belt 53 moves from the mixed main material feeding component 1 to the additive feeding component 3. At this time, the gear 531 drives the transmission gear 15 to rotate, and the transmission gear 15 drives the conveying blade 14 to rotate. The conveying blade 14 corresponding to the mixed main material feeding component 1 The mixed main material is evenly laid on the bottom of the conveyor belt 53. When the coal liquefaction oil residue at the bottom moves to the lower end of the polymer feeding component 2, the conveying blade 14 evenly lays the polymer on the upper layer of the mixed main material or partially falls into the gap of the mixed main material. When the mixed main material and the polymer mixture moves to the lower end of the additive feeding component 3, because the additive in powder form is smaller than the mixed main material and the polymer in granular form, the conveying blade 14 conveys the additive to the gap between the mixed main material and the polymer, thereby realizing the stacking of different raw materials, with less accumulation of a single raw material, thereby greatly improving the mixing effect.

[0050] like Figure 5-Figure 8 As shown, slide grooves 131 are provided at both ends of the inner side of the discharge shell 13, and a dispersion component 16 is installed on the slide groove 131. The dispersion component 16 is located in the conveying port of the discharge shell 13. The dispersion component 16 includes a dispersion plate 161 and a transmission column 162 installed at one end of the dispersion plate 161. A return spring 164 is fixedly installed at the other end of the dispersion plate 161. The return spring 164 is fixedly connected to the discharge shell 13. A plurality of dispersion grooves are provided on the dispersion plate 161. The width of the dispersion groove is greater than the diameter of the corresponding dispersed raw material. For example, the general diameter of coal liquefaction oil residue is 2 mm, so the width of the dispersion groove is 2.5-3.5 mm. The raw material here refers to coal liquefaction oil residue or polymer or additive or a mixture thereof. The following raw materials are referred to the same and are not repeated. A ball 163 is embedded in one end of the transmission column 162, and a plurality of protrusions 151 are arranged on the inner side of the transmission gear 15. A groove 152 is formed between adjacent protrusions 151, and the ball 163 fits with the protrusion 151.

[0051] When the transmission gear 15 drives the conveying blade 14 to discharge materials, the cooperation between the protrusion 151 and the groove 152 makes the protrusion 151 move to correspond to the ball 163, which will push the dispersion plate 161 to move in the direction of the reset spring 164. When the groove 152 corresponds to the ball 163, the dispersion plate 161 is reset under the effect of the reset spring 164. As the transmission gear 15 keeps rotating, the dispersion plate 161 presents reciprocating motion, so that the discharged raw materials are dispersed by the dispersion plate 161. It not only avoids the concentrated falling of raw materials and causing them to fall on the conveyor belt 53 and pile up, but also makes the raw materials more dispersed, which is convenient for mixing different raw materials, further improving the mixing effect, and is synchronized with the transmission gear 15. The structural design is simple and practical, and the effect is remarkable.

[0052] like Figure 3-Figure 4 as well as Fig. 9 As shown, multiple groups of auxiliary mixing components 6 are also arranged on the inner side of the main housing 4, and the multiple groups of auxiliary mixing components 6 are all located on the upper side of the uniform conveying mixing component 5. The auxiliary mixing components 6 include a transmission tooth head 61 and a central column 62 fixedly arranged on the upper end of the transmission tooth head 61. The transmission tooth head 61 is meshed with the teeth 531. The two ends of the central column 62 are movably inserted into the shell wall of the main housing 4. Multiple groups of auxiliary claws 63 are installed on the outer side of the central column 62. The auxiliary claws 63 are arranged in an L shape when viewed from the side, and reset torsion springs 64 are fixedly installed on both end surfaces of the central column 62. When the reset torsion springs 64 are in an untwisted state, the lower ends of the auxiliary claws 63 are in contact with the conveyor belt. 53 fits together. When the conveyor belt 53 rotates, the transmission tooth head 61 is driven to rotate through the tooth 531. At this time, the reset torsion spring 64 is twisted and compressed, and the auxiliary claw 63 rotates. As the tooth 531 continues to rotate, the transmission tooth head 61 will be separated from the corresponding tooth 531. At this time, the reset torsion spring 64 resets and drives the auxiliary claw 63 to reset. The auxiliary claw 63 knocks on the raw material that has been unloaded and slightly inserts. In this reciprocating manner, multiple groups of auxiliary claws 63 can not only stir and mix the raw materials, but also knock on the raw materials and make the conveyor belt 53 vibrate, thereby making all the raw materials vibrate, thereby further improving the raw material mixing effect.

[0053] Step 4: The flat-laid and stacked mixture is conveyed to the secondary mixing mechanism. The secondary mixing mechanism performs secondary mixing and conveying at the same time. At this time, naphtha is added thereto, and the mixture is conveyed to the shearing machine for shearing.

[0054] like Figure 1-Figure 3As shown, the secondary mixing mechanism is composed of a supporting casing 7 and an auger mixing and conveying assembly 8. The auger mixing and conveying assembly 8 includes a private service motor 81 and an auger blade 82 installed at the driving end of the private service motor 81. The private service motor 81 is fixedly installed on one side of the supporting casing 7, and the auger blade 82 is located on the inner side of the supporting casing 7. After the mixed raw materials fall from the conveyor belt 53, they pass through the input port of the supporting casing 7 and fall into the cavity corresponding to the auger blade 82. The private service motor 81 drives the auger blade 82 to rotate, and the mixing temperature in the cavity corresponding to the auger blade 82 is 130-170°C, and the discharge port is opened to discharge the materials after mixing for 0.3-0.8 hours, and then the materials are transmitted to the shearing machine. The auger blade 82 not only mixes the raw materials again to improve the mixing effect, but also can synchronously convey the raw materials, so that the entire device completes the mixing.

[0055] Step 5: The finished material sheared by the shearing machine is crushed and pre-treated to make the finished material particles uniform, thereby completing the preparation of the coal liquefaction oil residue asphalt modifier.

[0056] It should be noted that, in the description of the present application, it should be understood that the terms "length", "thickness", "inside", "outside", "axial", "radial", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as a limitation on the present invention.

[0057] In addition, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a coal liquefaction oil residue asphalt modifier, characterized in that: The steps include: S1: filtering or centrifuging the coal liquefaction oil residue for purification, and drying the purified oil residue at 80-120° C. to remove moisture from the oil residue; S2: putting the dried coal liquefaction oil residue into a pyrolysis furnace for pyrolysis treatment, the pyrolysis temperature is 300-600°C, the pyrolysis atmosphere is nitrogen or inert gas, the pyrolysis product is activated, and the activated liquefied oil residue residue is mixed with coal tar and crushed into particles to prepare a mixed main material of liquefied oil residue residue and coal tar; S3: Add the pre-prepared mixed main material, polymer and additive into the feeding mechanism respectively, start the primary mixing mechanism to drive the mixed main material to fall, then drive the polymer to fall to the upper layer of the mixed main material, and then the additive falls into the gap between the mixed main material and the polymer to mix; The specific steps of S3 are as follows: S31: first, conveying the mixed main material into the mixed main material feeding component (1), conveying the polymer into the polymer feeding component (2), and conveying the additive into the additive feeding component (3); S32: Then, the private service motor 1 (51) is started to drive the driving roller (52) to rotate, thereby driving the conveyor belt (53) to rotate and driving the teeth (531) to rotate. At this time, the teeth (531) drive the transmission gear (15) to rotate, and the transmission gear (15) drives the conveying blades (14) to rotate. The conveying blades (14) corresponding to the mixed main material feeding assembly (1) evenly lay the mixed main material on the bottom of the conveyor belt (53); S33: When the mixed main material at the bottom moves to the lower end of the polymer feeding assembly (2), the conveying blade (14) similarly spreads the polymer evenly on the upper layer of the mixed main material or partially falls into the gaps of the mixed main material; S34: When the mixture of the main mixed material and the polymer moves to the lower end of the additive feeding assembly (3), the conveying blade (14) conveys the additive to the gap between the main mixed material and the polymer to complete the preliminary mixing; The feeding mechanism is composed of a mixed main material feeding component (1), a polymer feeding component (2) and an additive feeding component (3). The mixed main material feeding component (1) comprises a temporary storage box (11) and a discharge box (12) installed at the lower end of the temporary storage box (11). The discharge box (12) is located on the inner side of the main housing (4) and is arranged in a funnel shape when viewed from the side. A discharge shell (13) is installed at the output end of the discharge box (12). A conveying blade (14) is arranged on the inner side of the discharge box (12) located at the upper end of the discharge shell (13). The conveying blade (14) matches the inner side of the lower end of the discharge box (12). A transmission gear (15) is installed at the end of the conveying blade (14) located on the outer side of the discharge box (12). The transmission gear (15) is meshed with the teeth (531). The uniform conveying and mixing component (5) comprises a private service motor (51) and a driving roller (52) mounted on the driving end of the private service motor (51); the end of the driving roller (52) away from the private service motor (51) is rotatably connected to the inner side of the main housing (4); one driving roller (52) is disposed at each of the two ends of the inner side of the main housing (4); a conveying belt (53) is disposed on the outer sides of the two driving rollers (52); and a plurality of teeth (531) are disposed on both sides of the conveying belt (53); S4: The flat stacked mixed material is transported to the secondary mixing mechanism, which performs secondary mixing and transports the mixed material at the same time. At this time, naphtha is added to the mixed material. The mixed material is transported to a shearing machine for shearing; S5: The finished material sheared by the shearing machine is crushed and pre-treated to make the particles of the finished material uniform, thereby completing the preparation of the coal liquefaction oil residue asphalt modifier.

2. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 1, characterized in that: The polymer is one of styrene-butadiene-styrene block copolymer and ethylene-vinyl acetate copolymer.

3. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 2, characterized in that: The ratio of the mixed main material to the polymer is 3:

1.

4. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 1, characterized in that: The additive is one of an antioxidant and a light stabilizer.

5. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 4, characterized in that: The ratio of the mixed main material to the polymer to the additive is 3:1:0.

1.

6. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 1, characterized in that: In the S32, when the transmission gear (15) drives the conveying blade (14) to discharge the material, the protrusion (151) cooperates with the groove (152), so that when the protrusion (151) moves to correspond with the ball (163), the dispersion plate (161) is pushed to move in the direction of the reset spring (164); when the groove (152) corresponds with the ball (163), the dispersion plate (161) is reset under the effect of the reset spring (164); as the transmission gear (15) keeps rotating, the dispersion plate (161) presents a reciprocating motion, so that the discharged raw materials are dispersed and discharged by the dispersion plate (161); The inner ends of the material discharging shell (13) are provided with chute grooves (131), a dispersing assembly (16) is installed on the chute grooves (131), the dispersing assembly (16) is located in the conveying port of the material discharging shell (13), the dispersing assembly (16) comprises a dispersing plate (161) and a transmission column (162) installed at one end of the dispersing plate (161), a return spring (164) is fixedly installed at the other end of the dispersing plate (161), the return spring (164) is fixedly connected to the material discharging shell (13), a plurality of dispersing grooves are provided on the dispersing plate (161), a ball bearing (163) is embedded at one end of the transmission column (162), a plurality of protrusions (151) are arranged on the inner side of the transmission gear (15), a groove (152) is formed between adjacent protrusions (151), and the ball bearings (163) are fitted with the protrusions (151).

7. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 1, characterized in that: In S3, when the transmission belt (53) rotates, the teeth (531) drive the transmission tooth head (61) to rotate, and at this time, the reset torsion spring (64) is twisted and compressed, and the auxiliary claw (63) rotates. As the teeth (531) continue to rotate, the transmission tooth head (61) separates from the corresponding teeth (531), and at this time, the reset torsion spring (64) resets and drives the auxiliary claw (63) to reset, and the auxiliary claw (63) strikes the raw material that has been unloaded and is inserted; A plurality of auxiliary mixing components (6) are also arranged on the inner side of the main housing (4). The plurality of auxiliary mixing components (6) are all located on the upper side of the uniformly conveying mixing component (5). The auxiliary mixing components (6) include a transmission tooth head (61) and a center column (62) fixedly arranged on the upper end of the transmission tooth head (61). The transmission tooth head (61) is meshed with the teeth (531). A plurality of auxiliary claws (63) are installed on the outer side of the center column (62). Restoration torsion springs (64) are fixedly installed on both end surfaces of the center column (62).

8. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 1, characterized in that: The specific steps of S4 are as follows: S41: the mixed raw materials fall from the conveyor belt (53) through the input port of the supporting housing (7) and fall into the cavity corresponding to the auger blade (82), and the private service motor 2 (81) drives the auger blade (82) to rotate; S42: mixing in the cavity corresponding to the auger blade (82) at a temperature of 130-170° C. for 0.3-0.8 hours; S43: After the mixing is completed, the discharge port of the supporting casing (7) is opened to discharge the material and convey it to the shearing machine.

9. The method for preparing a coal liquefaction oil residue asphalt modifier according to claim 8, characterized in that: The secondary mixing mechanism is composed of a supporting casing (7) and an auger mixing and conveying assembly (8); the auger mixing and conveying assembly (8) comprises a second private service motor (81) and an auger blade (82) mounted on a driving end of the second private service motor (81); the second private service motor (81) is fixedly mounted on one side of the supporting casing (7); and the auger blade (82) is located on the inner side of the supporting casing (7).

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