A medium-temperature asphalt and modified asphalt circulation production system

Abstract

The present application discloses a medium-temperature asphalt and modified asphalt circulation production system, comprising a medium-temperature reactor, a plurality of modified reactors connected in series on one side of the medium-temperature reactor, a side discharge pipe provided on one side of the medium-temperature reactor and the plurality of modified reactors, and the feed pipes and discharge pipes of the medium-temperature reactor and the plurality of modified reactors are sequentially connected to the side discharge pipe through a plurality of three-way valves, wherein the discharge pipe of the medium-temperature reactor is also connected to a medium-temperature intermediate tank, the medium-temperature intermediate tank is connected to a medium-temperature asphalt storage tank via a medium-temperature delivery pump, the medium-temperature asphalt storage tank is connected to a loading pipe via a medium-temperature loading pump, the loading pipe is also connected to a medium-temperature asphalt circulation line, and the medium-temperature asphalt circulation line is connected to the feed pipe of the medium-temperature reactor. The present application produces two asphalt products, with diversified products; and according to the shipment volume of medium-temperature asphalt and modified asphalt, the output of the two products can be adjusted at any time, thereby reducing solid asphalt production, ensuring the normal completion of processing tasks, and effectively improving odor and environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt production, and in particular to a medium-temperature asphalt and modified asphalt circulation production system. Background Art

[0002] Asphalt is a complex, dark-brown mixture of hydrocarbons of varying molecular weights and their non-metallic derivatives. It is a highly viscous organic liquid that is liquid, black in surface color, and soluble in carbon disulfide. Asphalt is an organic cementitious material that provides water, moisture, and corrosion resistance. Asphalt can be primarily categorized as coal tar pitch, petroleum asphalt, and natural asphalt. Coal tar pitch is a byproduct of coking. Petroleum asphalt is the residue from crude oil distillation. Natural asphalt is stored underground, sometimes forming deposits or accumulating on the Earth's surface. Asphalt is primarily used in industries such as coatings, plastics, and rubber, as well as in road paving.

[0003] The reactor-type asphalt production process has a single product and few adjustment methods. Once the shipment volume is limited, in order to avoid pipeline blockage, solid asphalt needs to be produced to ensure the continuous operation of the production process. However, the production of solid asphalt leads to reduced economic benefits. The solid asphalt production process will form asphalt fume, which causes serious environmental pollution. Therefore, we proposed a medium-temperature asphalt and modified asphalt recycling production system to solve the above problems. Summary of the Invention

[0004] The present application provides a medium-temperature asphalt and modified asphalt circulation production system, which solves the problems of traditional asphalt production with single products, few adjustment means, and solid asphalt smoke pollution.

[0005] The present application provides a medium-temperature asphalt and modified asphalt circulation production system, including a medium-temperature reactor, a plurality of modified reactors are connected in series on one side of the medium-temperature reactor, a side discharge pipe is provided on one side of the medium-temperature reactor and the plurality of modified reactors, and the feed pipes and discharge pipes of the medium-temperature reactor and the plurality of modified reactors are sequentially connected to the side discharge pipe through a plurality of three-way valves, wherein the discharge pipe of the medium-temperature reactor is also connected to a medium-temperature intermediate tank, the medium-temperature intermediate tank is connected to a medium-temperature asphalt storage tank through a medium-temperature delivery pump, and the medium-temperature asphalt storage tank is connected to a medium-temperature loading pump through a medium-temperature loading pump. It is connected to the loading pipe, and the loading pipe is also connected to a medium-temperature asphalt circulation line, and the medium-temperature asphalt circulation line is connected to the feed pipe of the medium-temperature reactor. The end of the side line discharge pipe away from the medium-temperature reactor is connected to a modified intermediate tank, and the modified intermediate tank is connected to a vaporizer through a modified delivery pump, and the discharge pipe of the vaporizer is connected to multiple modified asphalt storage tanks corresponding to the modified reactor through a modified reflux line. The end of the discharge pipe of the vaporizer and the discharge pipes of multiple modified asphalt storage tanks are all connected to the loading pipe, and the side line discharge pipe is connected to a feed line.

[0006] Preferably, the feed line includes a medium-temperature reactor feed line and a reforming reactor feed line, the medium-temperature reactor feed line is located at one end of the side line discharge pipe close to the medium-temperature reactor, and the reforming reactor feed line is located between the medium-temperature reactor and the reforming reactor.

[0007] Preferably, the temperatures of the multiple reforming reactors are increased sequentially from those close to the medium-temperature reactor to those far away from the medium-temperature reactor.

[0008] Preferably, the number of the modified reactors is 3, and the corresponding number of the modified asphalt storage tanks is 3.

[0009] Preferably, the temperatures of the three reforming reactors are 355±5°C, 365±5°C, and 375±5°C, respectively, from the one closest to the medium-temperature reactor to the one farthest from the medium-temperature reactor.

[0010] Preferably, the temperatures of the three reforming reactors are 350±5°C, 360±5°C, and 370±5°C, respectively, from the one closest to the medium-temperature reactor to the one farthest away from the medium-temperature reactor.

[0011] Preferably, the feed line and the reforming reactor are both connected to a venting tank.

[0012] Preferably, the multiple series-connected reforming reactors are arranged in descending order.

[0013] It can be seen from the above technical solutions that the present application provides a medium-temperature asphalt and modified asphalt circulation production system. The present application can produce two types of asphalt during the production process, namely medium-temperature asphalt and modified asphalt. When producing medium-temperature asphalt, the medium-temperature asphalt from the vacuum tower enters the medium-temperature reactor, and after the reaction is completed, it comes out from the side line of the medium-temperature reactor to the medium-temperature intermediate tank, and then enters the medium-temperature asphalt storage tank. If the medium-temperature asphalt is not needed, it can directly enter from the bottom of the medium-temperature reactor through the medium-temperature asphalt circulation line for circulation to avoid pipeline blockage, and also make the asphalt more When producing modified asphalt, the asphalt in the medium-temperature reactor can be fed into the first modifying reactor through the side-side discharge pipe, or the medium-temperature asphalt from the vacuum tower can be directly received through the modifying reactor feed line. According to different qualities, the side discharge of the first modifying reactor can be used, and the side feed of the next modifying reactor can be used (the shortest routing method is preferred, ensuring the side feed of the modifying reactor, bottom discharge or bottom feed side discharge). The temperature of the subsequent modifying reactors is increased in sequence to achieve outputs of different qualities.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The process of using multiple reactors to simultaneously produce medium-temperature asphalt and modified asphalt products in this application allows the output of the two products to be adjusted at any time according to the asphalt shipment volume, and the asphalt products are diversified; the processing tasks are not affected by the shipment volume, and the flexibility of asphalt production is improved;

[0016] 2. Reactor-type production of medium-temperature asphalt is carried out by circulating the asphalt storage tank and the reactor. The quality of the medium-temperature asphalt product can be adjusted flexibly, the asphalt is more uniform, and the pipeline will not be blocked during transportation, and the system operation is stable;

[0017] 3. By connecting multiple modification reactors in series, a variety of modified asphalts can be produced, thereby improving production efficiency.

[0018] To sum up, in this application, two asphalt products are produced at the same time, which diversifies the products; and according to the shipment volume of medium-temperature asphalt and modified asphalt, the output of the two products can be adjusted at any time to reduce solid asphalt production, ensure the normal completion of processing tasks, and effectively improve odor and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of this application, the following is a brief introduction to the drawings required for the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a design diagram of a medium-temperature asphalt and modified asphalt circulation production system proposed by the present invention;

[0021] In the figure: 1 medium-temperature reactor, 2 modified reactor, 3 medium-temperature reactor feeding line, 4 modified reactor feeding line, 5 medium-temperature intermediate tank, 6 modified intermediate tank, 7 modified asphalt storage tank, 8 medium-temperature asphalt storage tank, 9 medium-temperature asphalt circulation line, 10 modified reflux line, 11 vaporizer, 12 side line discharge pipe, 13 loading pipe. DETAILED DESCRIPTION

[0022] In order to enable people skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0023] See also Figure 1, a medium-temperature asphalt and modified asphalt recycling production system. Since asphalt cannot be interrupted during the discharge process, asphalt needs to be produced continuously. In order to increase corporate profits, it is generally processed and sold directly. Due to the single asphalt product, it has poor resistance to market risks. Once the shipment volume is limited, solid asphalt needs to be produced to complete the processing task. Without considering the heat loss caused by asphalt solidification, the sales price of solid asphalt is about 50-100 yuan less per ton than liquid asphalt. In addition, the production process of solid asphalt will form asphalt fume, which needs to be treated, which will further increase the processing cost. The price of medium-temperature liquid asphalt is similar to that of modified liquid asphalt, and the processing efficiency per ton increases by 39 yuan / ton of tar. Therefore, this application aims to design a production line that can simultaneously produce medium-temperature asphalt of different qualities and modified asphalt of different qualities to ensure product diversification, while also ensuring the smooth flow of pipelines and the uniformity of asphalt, so that the asphalt production can be balanced according to the daily shipment volume. It includes a medium-temperature reactor 1, which is used to process and produce medium-temperature asphalt. During the production process, the temperature at the bottom of the reactor is controlled at 260-300°C. The temperature control range is large and flexible, which is convenient for producing asphalt of different qualities.

[0024] One side of the medium-temperature reactor 1 is connected in series with multiple reforming reactors 2, and multiple reforming reactors 2 are connected in series. When the reforming reactors 2 are connected in series, it is sufficient to ensure that the reactors are discharged from the side and fed in from the bottom or discharged from the bottom and fed in from the side. Each reactor is provided with a stirrer. One side of the medium-temperature reactor 1 and the multiple reforming reactors 2 is provided with a side discharge pipe 12. The side discharge pipe 12 is mainly used for the feeding and discharging of raw materials, products and multiple reforming reactors 2 in series, and the feeding pipes and discharge pipes of the medium-temperature reactor 1 and the multiple reforming reactors 2 are sequentially connected to the side discharge pipe 12 through multiple three-way valves. Figure 1As shown, the direction of asphalt is controlled by changing the connection direction of the three-way valve, wherein the discharge pipe of the medium-temperature reactor 1 is also connected to a medium-temperature intermediate tank 5 for receiving medium-temperature asphalt that meets the standards, and is also convenient for sampling and taking materials. The medium-temperature intermediate tank 5 needs to be insulated to ensure the normal flow of the medium-temperature asphalt. The medium-temperature intermediate tank 5 is connected to the medium-temperature asphalt storage tank 8 through a medium-temperature delivery pump. After the capacity in the medium-temperature intermediate tank 5 reaches the set standard, the medium-temperature delivery pump is used to deliver the asphalt to the medium-temperature asphalt storage tank 8 for sealing and insulation to avoid leakage of asphalt fume, improve the environmental protection ability of the production line, and maintain the flow of asphalt. The medium-temperature asphalt storage tank 8 is connected to the loading pipe 13 through a medium-temperature loading pump, and needs to be supplied with medium-temperature asphalt. When the medium-temperature asphalt in the medium-temperature asphalt storage tank 8 is green, the medium-temperature asphalt can be directly output. The loading pipe 13 is also connected to the medium-temperature asphalt circulation line 9. When the medium-temperature asphalt storage tank 8 needs to load medium-temperature asphalt of different qualities or does not supply medium-temperature asphalt for a long time after the feeding is completed, the valve connected to the loading pipe 13 is controlled to make the medium-temperature asphalt circulation line 9 and the medium-temperature asphalt storage tank 8 connected. Or the asphalt in the medium-temperature asphalt storage tank 8 is returned to the medium-temperature reactor through the medium-temperature loading pump to realize the circulation of the medium-temperature asphalt. The quality of the medium-temperature asphalt product can be adjusted by the reactor and the circulation time. There are many adjustment methods to improve the uniformity of the asphalt. The medium-temperature asphalt circulation line 9 is connected to the feed pipe of the medium-temperature reactor 1;

[0025] The side discharge pipe 12 is connected to the modified intermediate tank 6 at one end away from the medium-temperature reactor 1. In order to reduce the layout of the pipeline and avoid pipeline blockage, the modified reactors 2 of different qualities are discharged through the side discharge pipe 12. The modified intermediate tank 6 is connected to the vaporizer 11 through the modified delivery pump. The vaporizer 11 cools the modified asphalt with a higher temperature, and the discharge pipe of the vaporizer 11 is connected to multiple modified asphalt storage tanks 7 corresponding to the modified reactor 2 through the modified reflux line 10. The end of the discharge pipe of the vaporizer 11 and the discharge pipes of the multiple modified asphalt storage tanks 7 are all connected to the loading pipe 13. Since the quality of each modified reactor 2 is different, the asphalt produced by different modified reactors 2 needs to be stored in different modified asphalt storage tanks 7. The side discharge pipe 12 is connected to a feed line. In this application, the connecting line is connected to the vacuum tower of the production line to receive the medium-temperature asphalt from the vacuum tower.

[0026] Furthermore, in order to ensure that the loading and reaction of the modified asphalt and the medium-temperature asphalt do not interfere with each other, in the present invention, the feed line includes a medium-temperature reactor feed line 3 and a modified reactor feed line 4. The medium-temperature reactor feed line 3 and the modified reactor feed line 4 both introduce the medium-temperature asphalt in the pressure reducing tower. The medium-temperature reactor feed line 3 is located at one end of the side line discharge pipe 12 close to the medium-temperature reactor 1. The incoming medium-temperature asphalt raw material can directly enter the medium-temperature reactor 1. When discharging, it will not overlap with this part of the pipeline, thereby ensuring the quality of the asphalt. The modified reactor feed line 4 is located between the medium-temperature reactor 1 and the modified reactor 2, and the medium-temperature asphalt raw material is directly fed into the first modified reactor 2. In this way, when the medium-temperature reactor 1 is fed and circulated, it will not hinder the direct feeding of the modified reactor 2, thereby ensuring the simultaneous production of multiple asphalts.

[0027] Furthermore, since the properties of asphalt are controlled by temperature, the temperature of multiple modification reactors 2 increases successively from close to the medium-temperature reactor 1 to far away from the medium-temperature reactor 1, and the shipment volume of modified asphalt is large, so multiple modification reactors 2 can produce modified asphalt of various qualities. When it is necessary to provide modified asphalt of multiple different qualities, production can be carried out simultaneously to ensure product diversity.

[0028] Furthermore, in order to maintain optimal production efficiency and delivery efficiency, the number of modified reactors 2 is 3, and the corresponding number of modified asphalt storage tanks 7 is 3, which can produce three different types of modified asphalt at the same time. The low-temperature modified reactor 2 can feed the high-temperature modified reactor 2 to meet the delivery requirements.

[0029] Furthermore, when the shipment volume is limited, the feed line and the reforming reactor 2 are both connected to a venting tank, which is used to vent the gas to produce solid asphalt, and the generated flue gas is treated by existing treatment equipment.

[0030] Furthermore, in order to make the low-temperature asphalt flow to the high-position asphalt side, multiple series-connected modification reactors 2 are arranged from high to low. When the low-temperature side reactor discharges material, gravity can be used to flow to the high-temperature side reactor, reducing the use of asphalt pumps.

[0031] Example 1

[0032] The medium-temperature asphalt coming from the vacuum tower enters the medium-temperature reactor 1 through the medium-temperature reactor feed line 3. The quality of the medium-temperature asphalt product is adjusted by the circulation time of the medium-temperature reactor 1 and the bottom temperature of the reactor. The bottom temperature of the reactor is controlled at 260-300°C. When discharging, the well-reacted medium-temperature asphalt comes out through the side line of the medium-temperature reactor 1 to the medium-temperature intermediate tank 5, and is then pumped to the medium-temperature asphalt storage tank 8 through the medium-temperature delivery pump. When discharging, it is loaded and discharged through the medium-temperature loading pump and the loading pipe 13. In addition to being directly loaded, the medium-temperature asphalt can be refluxed to the medium-temperature reactor 1 through the medium-temperature asphalt circulation line 9 to avoid pipeline blockage and make the medium-temperature asphalt more uniform. The medium-temperature asphalt is further adjusted by controlling the circulation time and number of cycles, and the production of medium-temperature asphalt of different qualities can be achieved through a single medium-temperature reactor 1.

[0033] Example 2

[0034] In this embodiment, there are three reforming reactors 2. Starting from the reforming reactor 2 closest to the medium-temperature reactor 1, the positions are arranged from high to low and the temperatures are arranged from low to high, namely 2#, 3# and 4#. The medium-temperature asphalt from the vacuum tower enters 2#. The temperature of the reforming reactor 2 is controlled at 350±5°C. After discharging from the 2# side line, the material is fed from the 3# side line, wherein the temperature of 3# is controlled at 360±5°C. After the reaction is completed, the material is discharged from the bottom of the 3# reactor and fed from the bottom of the 4# reactor. The temperature of 4# is 370±5°C. After the reaction, the material is discharged from the 4# side line. The discharges from 2#, 3# and 4# can be directly sent to the corresponding reformed asphalt storage tank 7 for storage after cooling by the vaporizer 11. When shipping, the corresponding reformed asphalt storage tank 7 can be opened for feeding according to requirements, or the reformed asphalt of the corresponding reforming reactor 2 can be directly discharged through the reforming reflux line 10 to feed, and three different types of reformed asphalt can be obtained at the same time.

[0035] Example 3

[0036] The arrangement of the three reforming reactors 2 in this embodiment is similar to that in embodiment 2, namely 2#, 3# and 4#. The medium-temperature asphalt from the vacuum tower enters the 2# reactor through the bottom of the 2# reactor. The temperature of the reforming reactor 2 is controlled at 355±5°C. After discharging from the 2# side line, the material is fed from the 3# side line. The temperature of the 3# reactor is controlled at 365±5°C. After the reaction is completed, the material is discharged from the bottom of the 3# reactor and fed from the bottom of the 4# reactor. The temperature of the 4# reactor is 375±5°C. After the reaction, the material is discharged from the 4# side line. The discharges of #, 3# and 4# are also cooled by the vaporizer 11 and directly sent to the corresponding modified asphalt storage tank 7 for storage. When shipping, the corresponding modified asphalt storage tank 7 is opened for feeding according to requirements, and the modified asphalt of the corresponding modified reactor 2 can also be directly discharged through the modified reflux line 10 to feed, thereby obtaining three different modified asphalts at the same time. Compared with Example 2, the temperature of the 2#, 3# and 4# reactors is changed in this embodiment, which can further control the quality of the modified asphalt.

[0037] It can be seen from the above technical solution that when used, the present application can produce two kinds of asphalt in the production process, namely medium-temperature asphalt and modified asphalt. When producing medium-temperature asphalt, the medium-temperature asphalt from the vacuum tower enters the medium-temperature reactor 1, and after the reaction is completed, it comes out from the side line of the medium-temperature reactor 1 to the medium-temperature intermediate tank 5, and then enters the medium-temperature asphalt storage tank 8. If the medium-temperature asphalt is not needed, it directly enters from the bottom of the medium-temperature reactor 1 through the medium-temperature asphalt circulation line 9 for circulation, avoiding pipeline blockage and making the asphalt more uniform. When producing modified asphalt The asphalt in the medium-temperature reactor 1 can be fed into the first reforming reactor 2 through the side-line-side line discharge pipe 12, or the medium-temperature asphalt from the vacuum tower can be directly received through the reforming reactor feed line 4. According to different qualities, the side line of the first reforming reactor 2 can be discharged, and the side line of the next reforming reactor 2 can be fed (the shortest routing method is preferred to ensure the side line feeding of the reforming reactor 2, the bottom discharge or the bottom feeding side line discharge). The temperature of the subsequent reforming reactors 2 is successively increased to achieve outputs of different qualities.

[0038] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope of this application is indicated by the claims.

[0039] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A medium-temperature asphalt and modified asphalt circulation production system, comprising a medium-temperature reactor (1), characterized in that: A plurality of reforming reactors (2) are connected in series on one side of the medium-temperature reactor (1), and a side discharge pipe (12) is provided on one side of the medium-temperature reactor (1) and the plurality of reforming reactors (2), and the feed pipes and discharge pipes of the medium-temperature reactor (1) and the plurality of reforming reactors (2) are sequentially connected to the side discharge pipe (12) through a plurality of three-way valves, wherein the discharge pipe of the medium-temperature reactor (1) is also connected to a medium-temperature intermediate tank (5), and the medium-temperature intermediate tank (5) is connected to a medium-temperature asphalt storage tank (8) through a medium-temperature delivery pump, and the medium-temperature asphalt storage tank (8) is connected to a loading pipe (13) through a medium-temperature loading pump, and the loading pipe (13) is also connected to a medium-temperature An asphalt circulation line (9), wherein the medium-temperature asphalt circulation line (9) is connected to the feed pipe of the medium-temperature reactor (1), and the end of the side line discharge pipe (12) away from the medium-temperature reactor (1) is connected to a modified intermediate tank (6), the modified intermediate tank (6) is connected to a vaporizer (11) via a modified delivery pump, and the discharge pipe of the vaporizer (11) is connected to a plurality of modified asphalt storage tanks (7) corresponding to the modified reactor (2) via a modified reflux line (10), the end of the discharge pipe of the vaporizer (11) and the discharge pipes of the plurality of modified asphalt storage tanks (7) are all connected to the loading pipe (13), and the side line discharge pipe (12) is connected to a feed line.

2. A medium-temperature asphalt and modified asphalt circulation production system according to claim 1, characterized in that: The feed line comprises a medium-temperature reactor feed line (3) and a reforming reactor feed line (4), wherein the medium-temperature reactor feed line (3) is located at one end of the side line discharge pipe (12) close to the medium-temperature reactor (1), and the reforming reactor feed line (4) is located between the medium-temperature reactor (1) and the reforming reactor (2).

3. A medium-temperature asphalt and modified asphalt circulation production system according to claim 1, characterized in that: The temperatures of the multiple reforming reactors (2) are increased sequentially from those close to the medium-temperature reactor (1) to those far away from the medium-temperature reactor (1).

4. A medium-temperature asphalt and modified asphalt circulation production system according to claim 3, characterized in that: The number of the modified reaction kettles (2) is 3, and the corresponding number of the modified asphalt storage tanks (7) is 3.

5. A medium-temperature asphalt and modified asphalt circulation production system according to claim 4, characterized in that: The temperatures of the three reforming reactors (2) are 355±5°C, 365±5°C, and 375±5°C, respectively, from the one closest to the medium-temperature reactor (1) to the one farthest from the medium-temperature reactor (1).

6. A medium-temperature asphalt and modified asphalt circulation production system according to claim 4, characterized in that: The temperatures of the three reforming reactors (2) are 350±5°C, 360±5°C, and 370±5°C, respectively, from the one closest to the medium-temperature reactor (1) to the one farthest from the medium-temperature reactor (1).

7. A medium-temperature asphalt and modified asphalt circulation production system according to claim 1, characterized in that: The feed line and the reforming reactor (2) are both connected to a venting tank.

8. A medium-temperature asphalt and modified asphalt circulation production system according to any one of claims 1 to 7, characterized in that: The multiple series-connected reforming reactors (2) are arranged in descending order.

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