Device and method for blending special asphalt by using heavy raw materials

Abstract

The invention provides a device and a method for blending special asphalt by using heavy raw materials. The device comprises a first heavy raw material oil tank, a second heavy raw material oil tank, a first additive raw material tank and a second additive raw material tank, the first heavy raw material oil tank and the second heavy raw material oil tank are both communicated with the first static mixer, the first static mixer is communicated with the first feeding ejector, and the first feeding ejector is communicated with the first mixing and stirring kettle; the first mixing and stirring kettle is communicated with the first filter, the first filter is communicated with the second static mixer, and the first additive raw material tank and the second additive raw material tank are also communicated with the second static mixer; the second static mixer is communicated with a second feeding ejector, the second static mixer is communicated with the second feeding ejector, the second feeding ejector is communicated with a second mixing and stirring kettle, the second mixing and stirring kettle is communicated with a second filter, the second filter is communicated with a product buffer tank, and the product buffer tank is communicated with a finished product tank; the device can perform intermittent or continuous operation, can adapt to component changes of different heavy raw materials, and ensures the quality and economic benefits of special asphalt products.

Description

Technical Field

[0001] The invention relates to a device and a method for preparing special asphalt from heavy raw materials, which can be applied to different heavy and inferior raw oils and target products with high index requirements. Technical Background

[0002] Heavy raw material asphalt mainly comes from petroleum refining, coal tar and biomass, etc. Its output is large and its price is relatively low. According to its chemical composition and physical properties, heavy raw material asphalt can be divided into oil slurry asphalt, tar asphalt and bio-asphalt.

[0003] Heavy raw asphalt has a high softening point, needle penetration and viscosity, which makes it stable at high temperatures. However, its poor fluidity limits its application in road engineering.

[0004] Therefore, heavy raw asphalt is usually chemically or physically modified to improve its fluidity and achieve reasonable blending with other asphalt components. Currently, chemical modification mainly includes adding anti-plasticizers, anti-aging agents, etc.; physical modification mainly includes heating, stirring and other methods.

[0005] Chinese patent CN 108285801 A discloses a method for processing inferior heavy oil to produce vehicle fuel and road asphalt, in which inferior heavy oil is added to an extraction device, subjected to selective solvent deasphalting, and then a series of high-quality raw materials for catalytic cracking / hydrocracking are obtained. This method uses complex chemical reactions, high catalyst costs, and high operating risks. Chinese patent CN101045872A proposes a method for producing high-grade road asphalt, in which deoiled hard asphalt and topped heavy oil slurry are blended online to obtain high-grade road asphalt. This method has poor adaptability to the harshness of raw materials. Summary of the invention

[0006] The main purpose of the present invention is to provide a method for preparing special asphalt using heavy raw materials in view of the shortcomings of existing heavy oil conversion technology. The method strengthens the treatment of inferior heavy distillate oil or residual oil with high sulfur and nitrogen content, high metal content, high asphaltene content or high residual carbon value, and obtains high-quality road asphalt blending components, thereby improving the yield of liquid components, increasing product value, and reducing environmental pollutant emissions.

[0007] The second object of the present invention is to provide a device for preparing special asphalt using the method, which has a flexible operation mode and is convenient for switching between different operating conditions according to raw materials and products.

[0008] To achieve the above object, the first technical solution provided by the present invention is as follows:

[0009] A device for preparing special asphalt using heavy raw materials, characterized in that it includes a first heavy raw material oil tank, a second heavy raw material oil tank, a first additive raw material tank, and a second additive raw material tank; the first heavy raw material oil tank and the second heavy raw material oil tank are both connected to a first static mixer, the first static mixer is connected to a first feed injector, and the first feed injector is connected to a first mixing and stirring kettle; the first mixing and stirring kettle is connected to a first filter, the first filter is connected to a second static mixer, and the first additive raw material tank and the second additive raw material tank are also connected to the second static mixer; the second static mixer is connected to a second feed injector, the second static mixer is connected to a second feed injector, the second feed injector is connected to a second mixing and stirring kettle, the second mixing and stirring kettle is connected to a second filter, the second filter is connected to a product buffer tank, and the product buffer tank is connected to a finished product tank.

[0010] Furthermore, in the above-mentioned device for preparing special asphalt using heavy raw materials, the first heavy raw material oil tank is connected to the first pipeline connected to the first static mixer, and the first pipeline is also provided with a first rotor pump and a valve; the second heavy raw material oil tank is connected to the first static mixer through a second pipeline, and the second pipeline is provided with a second rotor pump and a valve; the first additive raw material tank is connected to the second static mixer through an eighth pipeline, and the eighth pipeline is also provided with a third rotor pump and a valve; the second additive raw material tank is connected to the eighth pipeline through a fourth pipeline, and the fourth pipeline is also provided with a fourth rotor pump and a valve.

[0011] Furthermore, in the above-mentioned device for preparing special asphalt using heavy raw materials, the first static mixer is connected to the first feed injector through a third pipeline.

[0012] Furthermore, in the above-mentioned device for preparing special asphalt using heavy raw materials, a first delivery pump is also provided between the first mixing and stirring tank and the first filter, the first mixing and stirring tank and the first filter are connected through a fifth pipeline, and the first delivery pump is provided on the fifth pipeline; the fifth pipeline is also connected to the first static mixer through a sixth pipeline.

[0013] Furthermore, in the above-mentioned device for preparing special asphalt using heavy raw materials, the second static mixer is connected to the second feed injector through the ninth pipeline; the second static mixer is also connected to the seventeenth pipeline through the thirteenth pipeline.

[0014] Furthermore, in the above-mentioned device for preparing special asphalt using heavy raw materials, the second mixing and stirring kettle is connected to the second delivery pump through the tenth pipeline, and the second delivery pump is connected to the second filter through the twelfth pipeline; the twelfth pipeline is also connected to the thirteenth pipeline through the eleventh pipeline, and the eleventh pipeline is provided with a valve; the eleventh pipeline is also connected to the fifteenth pipeline, and the fifteenth pipeline is connected to the buffer tank through the sixteenth pipeline.

[0015] Furthermore, in the above-mentioned device for preparing special asphalt using heavy raw materials, the second filter is connected to the product buffer tank through the fourteenth pipeline, the product buffer tank is connected to the finished product tank through the seventeenth pipeline, and the seventeenth pipeline is provided with a third delivery pump valve; the seventeenth pipeline is also connected to the thirteenth pipeline through the eighteenth pipeline; the fifteenth pipeline is connected to the finished product tank through the nineteenth pipeline.

[0016] The second technical solution provided by the present invention is as follows:

[0017] A method for preparing special asphalt using heavy raw materials, characterized in that the device described in the first technical solution is used, two heavy raw materials enter the first heavy raw material oil tank and the second heavy raw material oil tank respectively, pass through the first static mixer and then be transported to the first feed injector, and then enter the first mixing and stirring kettle for uniform stirring, and then be divided into two streams by the second delivery pump, one stream is circulated and prepared, and the other stream is mixed with the additive raw material delivered by the first additive raw material tank and the second additive raw material tank through the first filter; the prepared oil sample and additive pass through the second static mixer and the second feed injector in the form of a jet flow to enter the second mixing and stirring kettle so that the mixed system is evenly dispersed, and the prepared special asphalt product passes through the third delivery pump and the second filter and enters the product buffer tank, and is recycled or transported to the finished product tank according to the quality of the prepared special asphalt.

[0018] Furthermore, in the above-mentioned method of preparing special asphalt using heavy raw materials, the heavy raw materials include one or more of vacuum residue oil, slurry bed tailings, propylene deheavy oil, ethylene cracking tar, and lubricating oil refined extract oil; the additive raw materials include one or more of modifiers, cross-linking agents, swelling oils, promoters and carbon black; and the first filter and the second filter filling materials are one or more of silica gel, activated carbon, dealuminated molecular sieves, metal ion exchange molecular sieves, ash slag, wood cellulose, alumina and coke.

[0019] Furthermore, in the above-mentioned method of preparing special asphalt using heavy raw materials, the operating temperature of the first mixing and stirring kettle and the second mixing and stirring kettle is 50-250°C, the operating pressure is 0.01-1.00MPa, the residence time is 30min-800min, the operating liquid level is 50%-90%, and the stirring speed is 30r / min-6000r / min;

[0020] The first heavy raw material oil tank, the second heavy raw material oil tank, the first additive raw material tank, the second additive raw material tank and the product buffer tank have an operating temperature of 50 to 250° C., an operating pressure of 0.01 to 1.00 MPa and a power of 50 to 600 kW.

[0021] Compared with the prior art, the technical solution provided by the present invention has the following technical advantages:

[0022] 1. The method of preparing special asphalt using heavy raw materials provided by the present invention is to carry out recycling and reprocessing or transport to the finished product tank. The method strengthens the treatment of inferior heavy distillate oil or residual oil with high sulfur and nitrogen content, high metal content, high asphaltene content or high residual carbon value, and obtains high-quality road asphalt blending components, improves the yield of liquid components, increases product value, and reduces environmental pollutant emissions; ensures the quality and economic benefits of special asphalt products

[0023] 2. The device provided by the present invention has a flexible operation mode and can be operated intermittently or continuously. It can adapt to the changes in the components of different heavy raw materials and is convenient for switching different operating conditions according to raw materials and products. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The invention discloses a device for preparing special asphalt by utilizing heavy raw materials.

[0025] in:

[0026] The first heavy crude oil tank 101; the second heavy crude oil tank 102, the first additive raw material tank 103; the second additive raw material tank 104; the first rotor pump 105; the second rotor pump 106; the third rotor pump 107; the fourth rotor pump 108; the first static mixer 109; the first feed injector 110; the first mixing and stirring tank 111; the first delivery pump 112; the first filter 113; the second static mixer 114; the second feed injector 115; the second mixing and stirring tank 116; the second delivery pump 117; the second filter 118; the product buffer tank 119 is connected; the third delivery pump 120; the finished product tank 121;

[0027] The first pipeline 001; the second pipeline 002; the third pipeline 003; the fourth pipeline 004; the fifth pipeline 005; the sixth pipeline 006; the eighth pipeline 008; the ninth pipeline 009; the tenth pipeline 010; the eleventh pipeline 011; the twelfth pipeline 012; the thirteenth pipeline 013; the fourteenth pipeline 014; the fifteenth pipeline 015; the sixteenth pipeline 016; the seventeenth pipeline 017; the eighteenth pipeline 018; and the nineteenth pipeline 019. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the specific embodiments and the accompanying drawings, wherein the reference numerals are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] Example 1

[0030] This embodiment provides a device for preparing special asphalt using heavy raw materials, see Figure 1 , including a first heavy raw material oil tank 101, a second heavy raw material oil tank 102, a first additive raw material tank 103, and a second additive raw material tank 104; the first heavy raw material oil tank 101 and the second heavy raw material oil tank 102 are both connected to a first static mixer 109, and the first static mixer 109 is connected to a first feed injector 110 through a third pipeline 003. The first feed injector 110 is connected to the first mixing and stirring tank 111; the first mixing and stirring tank 111 is connected to the first filter 113, the first filter 113 is connected to the second static mixer 114, the first additive raw material tank 103 and the second additive raw material tank 104 are also connected to the second static mixer 114; the second static mixer 114 is connected to the second feed injector 115, the second static mixer 114 is connected to the second feed injector 115, the second feed injector 115 is connected to the second mixing and stirring tank 116, the second mixing and stirring tank 116 is connected to the second filter 118, the second filter 118 is connected to the product buffer tank 119, and the product buffer tank 119 is connected to the finished product tank 121.

[0031] Specifically, the first heavy raw oil tank 101 is connected to the first pipeline 001 connected to the first static mixer 109, and the first pipeline 001 is also provided with a first rotor pump 105 and a valve; the second heavy raw oil tank 102 is connected to the first static mixer 109 through the second pipeline 002, and the second pipeline 002 is provided with a second rotor pump 106 and a valve; the first additive raw material tank 103 is connected to the second static mixer 114 through the eighth pipeline 008, and the eighth pipeline is also provided with a third rotor pump 107 and a valve; the second additive raw material tank 104 is connected to the eighth pipeline 008 through the fourth pipeline 004, and the fourth pipeline 004 is also provided with a fourth rotor pump 108 and a valve.

[0032] A first delivery pump 112 is also provided between the first mixing and stirring tank 111 and the first filter 113. The first mixing and stirring tank 111 and the first filter 113 are connected via a fifth pipeline 005, and the first delivery pump 112 is provided on the fifth pipeline 005. The fifth pipeline 005 is also connected to the first static mixer 109 via a sixth pipeline 006.

[0033] The second static mixer 114 is connected to the second feed injector 115 via the ninth pipeline 009 ; the second static mixer 114 is also connected to the seventeenth pipeline 017 via the thirteenth pipeline 013 .

[0034] The second mixing and stirring tank 116 is connected to the second delivery pump 117 through the tenth pipeline 010, and the second delivery pump 117 is connected to the second filter 118 through the twelfth pipeline 012; the twelfth pipeline 012 is also connected to the thirteenth pipeline 013 through the eleventh pipeline 011, and the eleventh pipeline 011 is provided with a valve; the eleventh pipeline 011 is also connected to the fifteenth pipeline 015, and the fifteenth pipeline 015 is connected to the buffer tank 119 through the sixteenth pipeline 016.

[0035] The second filter 118 is connected to the product buffer tank 119 through the fourteenth pipeline 014, the product buffer tank 119 is connected to the finished product tank 121 through the seventeenth pipeline 017, and the seventeenth pipeline 017 is provided with a third delivery pump 120 valve; the seventeenth pipeline 017 is also connected to the thirteenth pipeline 013 through the eighteenth pipeline 018; the fifteenth pipeline 015 is connected to the finished product tank 121 through the nineteenth pipeline 019.

[0036] In order to facilitate heating, the first heavy raw oil tank 101, the second heavy raw oil tank 102, the first additive raw material tank 103, the second additive raw material tank 104 and the product buffer tank 119 are equipped with electric heating function. A heavy oil residue discharge port is set at the bottom, and a nitrogen protection opening is set at the tank top.

[0037] The first static mixer 109 and the second static mixer 114 are one or more of SV type, SL type, SH type, SX type, SK type, ISG type and SMV type; the swirl injector includes a forward swirl mixer, a reverse swirl mixer, a Venturi injector and a diffuser.

[0038] Example 2

[0039] The present embodiment provides a method for preparing special asphalt using heavy raw materials. The device described in Example 1 is used. Two streams of heavy raw materials enter the first heavy raw material oil tank 101 and the second heavy raw material oil tank 102 respectively, pass through the first static mixer 109 and are transported to the first feed injector 110, and then enter the first mixing and stirring tank 111 to be evenly stirred. Then, they are divided into two streams by the second delivery pump 112, one stream is circulated and prepared, and the other stream is mixed with the additive raw materials delivered from the first additive raw material tank 103 and the second additive raw material tank 104 through the first filter 113; the prepared oil sample and additive pass through the second static mixer 114 and the second feed injector 115 in the form of a jet flow to enter the second mixing and stirring tank 116 to evenly disperse the mixed system, and the prepared special asphalt product passes through the third delivery pump 117 and the second filter 118 and enters the product buffer tank 119, and is recycled or transported to the finished product tank 121 according to the quality of the prepared special asphalt.

[0040] When the device is in intermittent operation conditions, oil product 1 (vacuum residue) passes through the first heavy raw material tank 101, and oil product 2 (de-heavy oil) passes through the second heavy raw material tank 102, and is respectively transported to the first static mixer 109 through the first rotor pump 105 and the second rotor pump 106. Additive raw material 1 (cross-linking agent) passes through the third rotor pump 107, and additive raw material 2 (modifier) ​​passes through the fourth rotor pump 108 to the first static mixer 109 for intensive mixing with heavy raw material oil, and enters the first mixing and stirring tank 111 through the first feed injector 110. The feeding method is one-time addition, the operating temperature of the first mixing and stirring tank 111 is 150°C, the operating pressure is 0.1MPa, the residence time is 60min, the operating liquid level is 75%, and the stirring speed is 3000r / min. The base asphalt product is extracted from the first mixing and stirring tank 111, and is circulated and mixed through the fifth rotor pump 112 and the first pipeline 006. When the sampling meets the requirements, it passes through the first filter 113 for the next step.

[0041] The base asphalt product and additives are fed at once according to the proportion, and the mixed flow is transported to the second mixing and stirring tank 116 through the second static mixer 114 and the second feed injector 115. The operating temperature of the second mixing and stirring tank 116 is 180°C, the operating pressure is 0.1MPa, the residence time is 60-180min, the operating liquid level is 80%, and the stirring speed is 4000r / min. The flow produced from the second mixing and stirring tank 116 is circulated and mixed through the sixth rotor pump 117 and the second pipeline 011. When the sample meets the requirements, it is transported to the finished product tank 121 area through the second filter 118 and the product buffer tank 119 through the third delivery pump 120.

[0042] The heavy raw materials include one or more of vacuum residue, slurry bed tailings, propane de-heavy oil, ethylene cracking tar, and lubricating oil refined extraction oil; the additive raw materials include one or more of modifiers, cross-linking agents, swelling oils, promoters, and carbon black;

[0043] Example 3

[0044] The present embodiment provides a method for preparing special asphalt using heavy raw materials. The device described in Example 1 is used. Two streams of heavy raw materials enter the first heavy raw material oil tank 101 and the second heavy raw material oil tank 102 respectively, pass through the first static mixer 109 and are transported to the first feed injector 110, and then enter the first mixing and stirring tank 111 to be evenly stirred. Then, they are divided into two streams by the second delivery pump 112, one stream is circulated and prepared, and the other stream is mixed with the additive raw materials delivered from the first additive raw material tank 103 and the second additive raw material tank 104 through the first filter 113; the prepared oil sample and additive pass through the second static mixer 114 and the second feed injector 115 in the form of a jet flow to enter the second mixing and stirring tank 116 to evenly disperse the mixed system, and the prepared special asphalt product passes through the third delivery pump 117 and the second filter 118 and enters the product buffer tank 119, and is recycled or transported to the finished product tank 121 according to the quality of the prepared special asphalt.

[0045] When the device is in intermittent operation conditions, oil product 1 (vacuum residue) passes through the first heavy raw material oil tank 101, and oil product 2 (de-heavy oil) passes through the second heavy raw material oil tank 102, and is respectively delivered to the first static mixer 109 through the first rotor pump 105 and the second rotor pump 106. Additive raw material 1 (cross-linking agent) passes through the third rotor pump 107, and additive raw material 2 (modifier) ​​passes through the fourth rotor pump 108 to the first static mixer 109 for intensive mixing with heavy raw material oil, and enters the first mixing and stirring tank 111 through the first feed injector 110. The operating temperature of the first mixing and stirring tank 111 is 150°C, the operating pressure is 0.1MPa, the residence time is 120min, the operating liquid level is 75%, and the stirring speed is 3000r / min.

[0046] The base asphalt product is extracted from the first mixing and stirring kettle 111 and transported through the fifth rotor pump 112. The logistics is divided into two streams. One stream is returned to the first feed injector 110 through the first pipeline 006 to enhance the mixing effect, and the other stream is transported to the first filter 113 through the pipeline (005). The logistics distribution ratio is 1:1. The base asphalt product is transported to the second mixing and stirring kettle 116 through the third pipeline 009 and the second feed injector 115. The operating temperature of the second mixing and stirring kettle 116 is 180°C, the operating pressure is 0.1MPa, the residence time is 150min, the operating liquid level is 80%, and the stirring speed is 4000r / min. The finished asphalt is divided into two streams after passing through the sixth rotor pump 117. One stream is returned to the second feed injector 115 through the second pipeline 011 to enhance the mixing effect, and the other stream is transported to the second filter 118 through the fourth pipeline 012. The logistics distribution ratio is 1:1. Finished asphalt is transported to the product buffer tank 119, with an operating temperature of 150°C and an operating pressure of 0.1MPa, and the sample is tested and analyzed through the sampling port. When the asphalt product meets the index requirements, the material is transported to the finished product tank area through the seventh rotor pump 120; when the asphalt product does not meet the index requirements, the material is returned to the second mixing and stirring tank 116 through the seventh rotor pump 120 and the fifth pipeline 018.

[0047] It should be noted that the additives used in this application are adjusted according to the content of each component in the specific oil used.

[0048] The product quality performance test results obtained in Examples 1 and 2 are shown in Table 1.

[0049] Table 1 Asphalt product indicators obtained by two different operation methods

[0050]

Claims

1. A device for preparing special asphalt using heavy raw materials, characterized in that: The invention comprises a first heavy stock oil tank (101), a second heavy stock oil tank (102), a first additive stock tank (103), and a second additive stock tank (104); the first heavy stock oil tank (101) and the second heavy stock oil tank (102) are both connected to a first static mixer (109); the first static mixer (109) is connected to a first feed injector (110); the first feed injector (110) is connected to a first mixing and stirring kettle (111); the first mixing and stirring kettle (111) is connected to a first filter (113); the first filter (113) is connected to the second static mixer (1 14), the first additive raw material tank (103) and the second additive raw material tank (104) are also connected to the second static mixer (114); the second static mixer (114) is connected to the second feed injector (115), the second static mixer (114) is connected to the second feed injector (115), the second feed injector (115) is connected to the second mixing and stirring tank (116), the second mixing and stirring tank (116) is connected to the second filter (118), the second filter (118) is connected to the product buffer tank (119), and the product buffer tank (119) is connected to the finished product tank (121).

2. The device for preparing special asphalt using heavy raw materials according to claim 1, characterized in that: The first heavy raw material oil tank (101) is connected to the first static mixer (109) through a first pipeline (001), and the first pipeline (001) is also provided with a first rotor pump (105) and a valve; the second heavy raw material oil tank (102) is connected to the first static mixer (109) through a second pipeline (002), and the second pipeline (002) is provided with a second rotor pump (106) and a valve; the first additive raw material tank (103) is connected to the second static mixer (114) through an eighth pipeline (008), and the eighth pipeline is also provided with a third rotor pump (107) and a valve; the second additive raw material tank (104) is connected to the eighth pipeline (008) through a fourth pipeline (004), and the fourth pipeline (004) is also provided with a fourth rotor pump (108) and a valve.

3. The device for preparing special asphalt using heavy raw materials according to claim 1, characterized in that: The first static mixer (109) is connected to the first feed injector (110) via a third pipeline (003).

4. The device for preparing special asphalt using heavy raw materials according to claim 1, characterized in that: A first delivery pump (112) is also provided between the first mixing and stirring kettle (111) and the first filter (113); the first mixing and stirring kettle (111) and the first filter (113) are connected via a fifth pipeline (005); the first delivery pump (112) is provided on the fifth pipeline (005); the fifth pipeline (005) is also connected to the first static mixer (109) via a sixth pipeline (006).

5. The device for preparing special asphalt using heavy raw materials according to claim 1, characterized in that: The second static mixer (114) is connected to the second feed injector (115) via the ninth pipeline (009); the second static mixer (114) is also connected to the seventeenth pipeline (017) via the thirteenth pipeline (013).

6. The device for preparing special asphalt using heavy raw materials according to claim 1, characterized in that: The second mixing and stirring kettle (116) is connected to the second delivery pump (117) through the tenth pipeline (010), and the second delivery pump (117) is connected to the second filter (118) through the twelfth pipeline (012); the twelfth pipeline (012) is also connected to the thirteenth pipeline (013) through the eleventh pipeline (011), and the eleventh pipeline (011) is provided with a valve; the eleventh pipeline (011) is also connected to the fifteenth pipeline (015), and the fifteenth pipeline (015) is connected to the buffer tank (119) through the sixteenth pipeline (016).

7. The device for preparing special asphalt using heavy raw materials according to claim 1, characterized in that: The second filter (118) is connected to the product buffer tank (119) via a fourteenth pipeline (014), and the product buffer tank (119) is connected to the finished product tank (121) via a seventeenth pipeline (017). A third delivery pump (120) valve is provided on the seventeenth pipeline (017); the seventeenth pipeline (017) is also connected to the thirteenth pipeline (013) via an eighteenth pipeline (018); the fifteenth pipeline (015) is connected to the finished product tank (121) via a nineteenth pipeline (019).

8. A method for preparing special asphalt using heavy raw materials, characterized in that: According to the device described in any one of claims 1 to 7, two heavy raw materials enter the first heavy raw material tank (101) and the second heavy raw material tank (102) respectively, pass through the first static mixer (109) and are transported to the first feed injector (110), then enter the first mixing and stirring kettle (111) and are evenly stirred, and then are divided into two streams by the second delivery pump (112), one stream is circulated and prepared, and the other stream is mixed with the additive raw materials delivered from the first additive raw material tank (103) and the second additive raw material tank (104) through the first filter (113); the prepared oil sample and additive pass through the second static mixer (114) and the second feed injector (115) in the form of a jet flow to enter the second mixing and stirring kettle (116) to make the mixed system evenly dispersed, and the prepared special asphalt product passes through the third delivery pump (117) and the second filter (118) and enters the product buffer tank (119), and is recycled or transported to the finished product tank (121) according to the quality of the prepared special asphalt.

9. The method for preparing special asphalt using heavy raw materials according to claim 8, characterized in that: The heavy raw materials include one or more of vacuum residue, slurry bed tailings, propane de-heavy oil, ethylene cracking tar, and lubricating oil refining extract oil; the additive raw materials include one or more of modifiers, cross-linking agents, swelling oils, promoters, and carbon black; the first filter (113) and the second filter (118) are filled with one or more of silica gel, activated carbon, dealuminated molecular sieves, metal ion exchange molecular sieves, furnace ash slag, wood cellulose, alumina, and coke.

10. The method for preparing special asphalt using heavy raw materials according to claim 8, characterized in that: The operating temperature of the first mixing and stirring kettle (111) and the second mixing and stirring kettle (116) is 50-250°C, the operating pressure is 0.01-1.00 MPa, the residence time is 30-800 min, the operating liquid level is 50%-90%, and the stirring speed is 30 r / min-6000 r / min; The first heavy crude oil tank (101), the second heavy crude oil tank (102), the first additive raw material tank (103), the second additive raw material tank (104), and the product buffer tank (119) have an operating temperature of 50 to 250°C, an operating pressure of 0.01 to 1.00 MPa, and a power of 50 to 600 kW.

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