CN114196428B - Prebaked anode continuous asphalt melting system and melting process - Google Patents
Prebaked anode continuous asphalt melting system and melting process Download PDFInfo
- Publication number
- CN114196428B CN114196428B CN202111341315.9A CN202111341315A CN114196428B CN 114196428 B CN114196428 B CN 114196428B CN 202111341315 A CN202111341315 A CN 202111341315A CN 114196428 B CN114196428 B CN 114196428B
- Authority
- CN
- China
- Prior art keywords
- asphalt
- melting
- melter
- solid
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 256
- 238000002844 melting Methods 0.000 title claims abstract description 111
- 230000008018 melting Effects 0.000 title claims abstract description 111
- 238000010309 melting process Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 239000007787 solid Substances 0.000 claims abstract description 103
- 238000010438 heat treatment Methods 0.000 claims abstract description 55
- 238000003756 stirring Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 10
- 239000002893 slag Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 prebaked anodes Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/10—Melting
- C10C3/12—Devices therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Road Paving Machines (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a prebaked anode continuous asphalt melting system and a melting process, wherein the melting system comprises a discharging pit, a solid asphalt cache tank, a crusher, a melter, a buffer tank and a liquid asphalt cache tank which are connected in sequence; the melter is provided with a melting area and a slag discharging area, and the melting area is divided into a primary melting area and a heating area. Continuously adding solid asphalt aggregate into a melter, wherein the solid asphalt is initially melted in an initial melting zone, the fluidity is gradually improved, and the solid asphalt is pressed into a heating zone under the pressure of the solid asphalt added subsequently to be heated to form low-temperature liquid asphalt; the low temperature liquid asphalt overflows into a buffer tank to be further heated and finally form high temperature liquid asphalt. Compared with the prior art, the invention can continuously melt the solid asphalt and maintain higher melting efficiency.
Description
Technical Field
The invention relates to the technical field of solid asphalt melting, in particular to a prebaked anode continuous asphalt melting system and a melting process.
Background
In the production process of carbon products such as prebaked anodes, liquid asphalt plays a very important role as an adhesive, and determines whether bulk particles can be molded or not and the yield of the molding process, thereby influencing the production quality of the prebaked anodes; at normal temperature, asphalt is in a solid state, asphalt is melted into liquid in a melting tank in the current asphalt melting tank mode, and then the liquid is sent into a high-level tank of a raw anode manufacturing workshop for anode production under the action of an asphalt pump.
The prior asphalt is melted by using a melting tank intermittently, and the melted asphalt still stands and precipitates in the melting tank; however, the asphalt melting parameters between the grooves are difficult to ensure to be completely consistent, asphalt melted in the previous groove can affect asphalt melted in the next groove, asphalt residues can affect asphalt quality to a certain extent, and therefore, large difference exists between the grooves, and uniformity of asphalt quality after melting is difficult to ensure, so that the anode production is affected.
The intermittent melting efficiency of the melting tank is low, so that a plurality of asphalt melting tanks are required to be built for production and use, and therefore charging equipment, melting facilities, asphalt conveying facilities, dust collection points and related valves are increased, and the production cost and the occupied area of equipment are increased.
In addition, in the traditional intermittent melting process, an electric tar precipitator is used for collecting and treating asphalt smoke generated in the melting process, however, because asphalt is melted by adopting an intermittent asphalt melting tank mode, the emission of asphalt smoke is unstable and the purification efficiency of a purification system is seriously affected along with the propulsion of the operation time under the action of moisture in the asphalt smoke, and the emission index is easily out of standard.
Therefore, in order to further improve the progress of the process and technology of the baked anode, in combination with the development trend of the industry technology, further development and improvement of the technology of asphalt melting in the production process of the prebaked anode are needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a melting system and a melting process which can efficiently and continuously melt solid asphalt in the production process of a prebaked anode.
The invention is realized by the following technical scheme:
The prebaked anode continuous asphalt melting system comprises a melter and a buffer tank, wherein a feed pipe is arranged on the melter, and solid asphalt aggregate is added into the melter from the feed pipe; the interior of the melter is provided with a melting zone for melting solid asphalt aggregate, the melting zone comprises a preliminary melting zone and a heating zone, and heating coil groups are arranged in the preliminary melting zone and the heating zone;
The heating coil group in the preliminary melting zone is used for carrying out preliminary heating melting on the solid asphalt aggregate, the fluidity of the solid asphalt aggregate is increased after the solid asphalt aggregate is heated in the preliminary melting zone, and the solid asphalt aggregate is gradually pressed into the heating zone under the pressure of the solid asphalt aggregate which is subsequently added into the melter;
the heating coil group in the heating zone heats the asphalt aggregate and forms low-temperature liquid asphalt; the melter is also provided with an overflow port, and the low-temperature liquid asphalt flows out of the overflow port and enters the buffer tank;
the buffer tank is also provided with a heating coil group, and the buffer tank is used for further heating the low-temperature liquid asphalt to form high-temperature liquid asphalt.
Further, the heating coil groups in the primary melting zone are arranged into a plurality of layers of inner coils, and the plurality of layers of inner coils are arranged at intervals in the vertical direction; each layer of inner coil pipe is composed of a plurality of coil pipe rings which are arranged at intervals in the horizontal direction, and the gaps among the coil pipe rings of the plurality of layers of inner coil pipe gradually decrease along with the decrease of the height; the solid asphalt aggregate passes through gaps among coil rings, and is gradually heated and melted by coils in a plurality of layers in the falling process of the primary melting zone; asphalt aggregate is pressed into the heating area from the bottom of the inner coil pipe at the lowest part after being melted in the primary melting area.
Further, stirring devices are further arranged in the melting zone, each stirring device comprises a stirring shaft and stirring blades, and the stirring devices stir asphalt in the melter.
Further, a discharge hole is formed in the buffer groove, and a plurality of liquid discharge pipelines are communicated with the discharge hole; the melter is provided with a return pipe which is communicated with the liquid discharge pipeline; the high-temperature liquid asphalt flows into the liquid discharge pipeline from the discharge port, and a part of the high-temperature liquid asphalt flows into the return pipe through the liquid discharge pipeline and flows back into the melter from the return pipe so as to accelerate the melting of the solid asphalt aggregate.
Further, the melting system further comprises a plurality of solid asphalt cache tanks, a crusher and a liquid asphalt cache tank, wherein the solid asphalt cache tanks, the crusher, the melter, the buffer tank and the liquid asphalt cache tank are sequentially connected; the solid asphalt cache tank is used for storing solid asphalt, and a quantitative feeder is arranged at the bottom of the solid asphalt cache tank and is used for quantitatively conveying the solid asphalt into the crusher; the crusher crushes and mixes the solid asphalt to form solid asphalt aggregate, and the formed solid asphalt aggregate is added into the melter from the feeding pipe; and part of high-temperature liquid asphalt formed in the buffer groove is conveyed into a liquid asphalt buffer tank for storage through a liquid discharge pipeline.
Further, a temperature measuring point is arranged at the overflow port of the melter and used for detecting the temperature of liquid asphalt overflowed from the melter.
The invention also provides a prebaked anode continuous asphalt melting process, which comprises the following process steps:
a. continuously adding the mixed solid asphalt aggregate into a melter from a feed pipe, and enabling the solid asphalt aggregate to enter a preliminary melting zone to be preliminarily heated and melted by a heating coil group, so that the fluidity is gradually increased;
b. under the pressure of the subsequently added asphalt aggregate, the preliminarily melted asphalt aggregate is gradually pressed into a heating zone from the bottom of a heating coil group of the preliminarily melting zone, and the heating coil group in the heating zone further heats the asphalt aggregate and forms low-temperature liquid asphalt;
c. Along with the increase of the feeding amount and the melting time, the liquid level of the low-temperature liquid asphalt in the melter is gradually increased, the low-temperature liquid asphalt overflows into a buffer tank from an overflow port, and the buffer tank further heats the low-temperature liquid asphalt to form high-temperature liquid asphalt;
d. And part of high-temperature liquid asphalt flowing out of the discharge port of the buffer tank flows back to the melter so as to accelerate the melting of solid asphalt aggregate in the melter.
Further, the heat conducting medium in the heating coil group is heat conducting oil, and the temperature of the heat conducting oil which is introduced into the heating coil group is 260-280 ℃; the temperature of the low-temperature liquid asphalt formed in the process a and the process b is 150-180 ℃, and the temperature of the high-temperature liquid asphalt formed in the process c is 200-220 ℃.
Further, when the melter is operated for the first time, solid asphalt aggregate is intermittently conveyed into the melter according to the asphalt melting condition in the melter; after the liquid asphalt overflows from the melter, the liquid asphalt is adjusted to be continuously fed, and the feeding amount is gradually adjusted from small to large according to the melting condition of the solid asphalt.
Further, the opening degree of a heat conduction oil inlet valve of a heating coil group in the melter is controlled according to the temperature of the low-temperature liquid asphalt detected by a temperature measuring point arranged at an overflow port of the melter, so that the melting speed of solid asphalt and the temperature of the low-temperature liquid asphalt are controlled.
Compared with the prior art, the invention has the advantages that:
1. Through setting up of solid pitch buffer tank, melter, dashpot and liquid pitch buffer tank, can play the effect of depositing solid pitch and liquid pitch to can high-efficient continuous melting solid pitch.
2. Through the setting of melting district and agitating unit, can play the effect that improves solid pitch and melt efficiency.
3. Through the arrangement of the primary melting area, the heating area and the multilayer inner coil pipe, the asphalt can be melted step by step, and the melting efficiency is improved.
4. By re-transporting the high-temperature liquid asphalt in the buffer tank to the melter, an effect of promoting the melting of the fixed asphalt to thereby improve the asphalt melting efficiency can be achieved.
5. Through the arrangement of the liquid asphalt discharging valve and the sediment box, the effect of cleaning the melter can be achieved.
6. Through the setting of manhole, the staff can enter into the melter from the manhole and overhaul.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a prebaked anode continuous pitch melting system of the present invention;
FIG. 2 is a schematic view showing the overall structure of the melter of the present invention;
FIG. 3 is a schematic view of an inner coil structure according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the overall structure of the buffer tank of the present invention;
FIG. 5 is a schematic flow chart of the prebaked anode continuous pitch melting process of the present invention;
FIG. 6 is a schematic diagram of the solid pitch melting process of the present invention.
1. A solid asphalt cache tank; 2. a dosing machine; 3. bucket elevator; 4. a crusher; 5. a melter; 6. a buffer tank; 7. a feed pipe; 8. a melting zone; 9. a slag discharging area; 10. a stirring device; 11. a heating coil group; 12. an overflow port; 13. a return pipe; 14. a sediment tank; 15. overflow feed inlet; 16. a discharge port; 17. a temperature measuring point; 18. closing the coil ring; 19. a connecting rib; 20. a preliminary melting zone; 21. a temperature rising region; 22. an inner coil; 23. stirring vane.
Detailed Description
The technical scheme of the invention is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1, a prebaked anode continuous asphalt melting system according to an embodiment of the present invention includes a discharge pit, a solid asphalt tank 1, a crusher 4, a melter 5, a buffer tank 6, and a liquid asphalt tank (wherein the discharge pit and the liquid asphalt tank are not shown in fig. 1). In the production process, the carrier vehicle discharges the solid asphalt into a discharge pit, and the discharge pit and the solid asphalt cache tank 1 can be connected by a belt conveyor, a bucket elevator 3 and other common solid asphalt conveying devices (not shown in the figure). Solid asphalt with different quality and specification is conveyed from the unloading pit to different solid asphalt cache tanks 1 for storage through a solid asphalt conveying device.
As shown in fig. 1, a constant feeder 2 is installed at the bottom of the solid asphalt cache tank 1, the constant feeder 2 is connected with a crusher 4, and the crusher 4 can be a ring hammer crusher 4 commonly used at present. During production, according to production requirements, each solid asphalt cache tank 1 quantitatively releases solid asphalt with different quality and specification according to aggregate proportions through a quantitative feeder 2, and the solid asphalt with different quality is conveyed into a crusher 4 through the quantitative feeder 2 to be crushed and mixed into solid asphalt aggregate required by production; in the embodiment, the crusher 4 is connected with the melter 5 through the bucket elevator 3, a feed pipe 7 is arranged at the top of the melter 5, and crushed and mixed solid asphalt aggregate is conveyed into the melter 5 from the feed pipe 7 through the bucket elevator 3.
As shown in fig. 1 and 2, the melter 5 has a melting zone 8, and a stirring device 10 (the stirring device is composed of a motor, a speed regulator, a rotating shaft, a blade, etc., and is a conventional device in a reaction kettle, a stirrer, etc., and therefore, not described in detail herein) is disposed in the melting zone 8. In this embodiment, the melting zone 8 further includes a preliminary melting zone 20 and a temperature raising zone 21, and the heating coil groups 11 are provided in both the preliminary melting zone 20 and the temperature raising zone 21. The solid asphalt is continuously added into the melter 5 from the feeding pipe 7 of the melter 5, and is scattered and uniformly mixed under the stirring action of the stirring device 10, and meanwhile, the solid asphalt is heated more uniformly. In the preliminary melting zone 20, the heating coil groups 11 in the preliminary melting zone 20 are provided as a plurality of in-layer coils 22, and the plurality of in-layer coils 22 are arranged at intervals in the vertical direction; each layer of coil 22 is composed of a plurality of coil rings (refer to fig. 3) which are arranged at intervals in the horizontal direction, solid asphalt aggregate passes through gaps among the coil rings of the inner coil 22, and the coil rings heat and melt the solid asphalt aggregate.
In order to improve the melting efficiency and the melting quality, the gaps among coil rings of the coil 22 in a plurality of layers can be gradually decreased along with the decrease of the height of the inner coil 22, so that the solid asphalt aggregate can be melted step by step; during the falling of the primary melting zone 20, the solid asphalt pieces are gradually melted, the size thereof is gradually reduced, and the fluidity of the asphalt is gradually increased, thereby facilitating rapid passage through the coils 22 in each layer; this prevents solid asphalt blocks from building up on the inner coil 22, thereby facilitating rapid and sufficient melting of the solid asphalt and improving melting efficiency.
As shown in fig. 3, in the actual production process, the inner coil 22 may be composed of a plurality of concentric closed coil rings 18, the plurality of closed coil rings 18 are spaced from each other, and adjacent closed coil rings 18 may be connected by connecting ribs 19; in another embodiment, the inner coil 22 may be configured to be wound with a coil ring such that the inner coil 22 is in a vortex shape (not shown) in a horizontal plane. Of course, the inner coil 22 of this embodiment may be replaced by a grid of straight tubes evenly spaced.
As shown in fig. 2, the inner coil 22 initially heats and melts the solid asphalt. The fluidity of the initially melted asphalt gradually increases, and as the solid asphalt aggregate is continuously added at the feed pipe 7, the initially melted asphalt is gradually pressed into the temperature raising zone 21 from the bottom of the inner coil 22 at the lowest layer under the pressure of the subsequent asphalt, and the heating coil group 11 in the temperature raising zone 21 further heats the asphalt. In the actual production process, the downward movement of asphalt can also be accelerated by changing the shape of the stirring blade 23 of the stirring device 10. For example, the stirring blades 23 may be provided as spiral auger blades, or by changing the bending angle of the stirring blades 23, so that the asphalt can be stirred and pushed downward during rotation, thereby facilitating the pressing of the asphalt into the temperature raising area 21 from the coil ring gap of the coil 22 in the lower layer.
The heating zone 21 further heats, dewaters, precipitates impurities and eventually melts the asphalt into a low temperature liquid asphalt. The level of the low-temperature liquid asphalt in the melter 5 is gradually increased as the heating time increases; in this embodiment, the side wall of the melter 5 near the top is provided with an overflow port 12, and the low-temperature liquid asphalt continuously flows out from the overflow port 12. Thus, during the melting process, the solid asphalt aggregate can be continuously added into the melter, and the melter can continuously discharge low-temperature liquid asphalt, so that continuous melting of asphalt is realized.
As shown in fig. 2 and 4, the top of the buffer tank 6 is provided with an overflow feed port 15, and the low-temperature liquid asphalt flowing out from the overflow port 12 of the melter 5 enters the buffer tank 6 from the overflow feed port 15. The buffer tank 6 is also provided with a heating coil group 11, and the heating coil group 11 further heats the low-temperature liquid asphalt to heat the asphalt and meet the process requirements. The low-temperature liquid asphalt is heated in the buffer tank 6 to form high-temperature liquid asphalt, a discharge hole 16 is formed in the bottom of the buffer tank 6, a plurality of liquid discharge pipelines are communicated with the discharge hole 16, and the buffer tank 6 is respectively communicated with the liquid asphalt buffer tank and the melter 5 through the liquid discharge pipelines. In this embodiment, the top of the melter 5 is provided with a return pipe 13, and the discharge port 16 of the buffer tank 6 is communicated with the return pipe 13 through a liquid discharge pipe, and part of high-temperature asphalt is re-conveyed into the melter 5 through the return pipe 13, so that the melting of solid asphalt in the melter 5 is facilitated to be accelerated, and the melting efficiency is improved. Most of high-temperature asphalt is conveyed to a liquid asphalt cache tank for storage through an asphalt pump, and the high-temperature asphalt is kept stand and precipitated in the liquid asphalt cache tank and is quantitatively conveyed to an anode production workshop for anode production when the high-temperature asphalt is required to be used.
As shown in fig. 2, in this embodiment, a slag discharging area 9 is further provided in the melter 5, the slag discharging area 9 is located below the melting area 8, and a heating coil group 11 is also provided in the slag discharging area 9. The deslagging area 9 is arranged into a cone shape, a liquid asphalt discharging valve is arranged on the deslagging area 9, a sediment box 14 is arranged at the bottom of the deslagging area 9, and a manhole is arranged on the deslagging area 9. During the melting process, the liquid asphalt increases in level with increasing melting time and overflows from the overflow 12, and the asphaltenes enter the slag discharge area 9. When the melter 5 needs to be overhauled, firstly opening a liquid asphalt discharging valve to discharge liquid asphalt in the melter 5, and then opening the valve to discharge asphaltenes accumulated in the slag discharging area 9 into a slag box 14 at the bottom; after the liquid asphalt and asphaltene are discharged, the worker opens the access opening from where they enter the melter 5 for servicing the components.
Referring to fig. 5 and 6, the solid pitch continuous melting process of the present invention is as follows: firstly, respectively subpackaging solid asphalt into different solid asphalt cache tanks 1 according to quality and specification, and during production, the solid asphalt cache tanks 1 quantitatively convey the solid asphalt with different quality and specification into a ring hammer crusher 4 through a quantitative feeder 2 according to production requirements to crush and mix to form solid asphalt aggregate;
The crusher 4 conveys the solid asphalt aggregate into the melter 5, and the melter 5 melts the solid asphalt aggregate to form low-temperature liquid asphalt; as the melting time increases, the level of cryogenic liquid asphalt in melter 5 gradually increases and eventually overflows from overflow port 12 of melter 5; the low-temperature liquid asphalt overflows into the buffer tank 6 from the overflow port 12, and the buffer tank 6 can further heat the low-temperature liquid asphalt to form high-temperature liquid asphalt meeting the process requirements;
Most high-temperature liquid asphalt is conveyed into a liquid asphalt cache tank for standing and precipitation through an asphalt conveying pump and a conveying pipeline, and is quantitatively conveyed into a workshop for anode production when needed; part of the high-temperature liquid asphalt is returned to the melter 5 again to accelerate the melting of the solid asphalt in the melter 5, thereby improving the melting efficiency.
Compared with the traditional melting mode adopting a melting tank and a discontinuous melting mode, the invention firstly melts the solid asphalt into low-temperature liquid asphalt through the melter 5, then further heats the liquid asphalt through the buffer tank 6, and finally stores the liquid asphalt in the liquid asphalt buffer tank. Compared with the prior art, the continuous melting process of asphalt is completed and the melting efficiency is improved by matching the melter 5, the buffer tank 6 and the liquid asphalt buffer tank.
At present, along with the improvement of current density and environmental protection requirements in the production process of anode carbon block products, high-temperature modified asphalt with the softening point of 100-110 ℃ is mostly used. By using the melting process and the melting system provided by the invention, the heating medium introduced into the heating coil group 11 in the melter 5 and the buffer tank 6 is heat conduction oil, the temperature of the heat conduction oil is controlled between 260 ℃ and 280 ℃ during production, and solid asphalt is heated by the heat conduction oil in the melter 5 to form low-temperature liquid asphalt with the temperature of 150 ℃ to 180 ℃; in the buffer tank 6, the low-temperature liquid asphalt is further heated to 200-220 ℃ in accordance with the process requirements. In addition, a temperature measuring point 17 (refer to fig. 2) may be provided at the overflow port 12 of the melter 5 for monitoring the asphalt temperature, and the asphalt temperature can be maintained within a set range during continuous melting. The opening degree of the heat conducting oil inlet valve is controlled by the temperature measuring result of the temperature measuring point 17, so that the melting speed and the temperature of the solid asphalt are controlled. In order to ensure the melting quality of asphalt, when the melter 5 runs for the first time, feeding is interrupted according to the asphalt melting condition in the melter 5 until liquid asphalt flows into the buffer tank 6 from the overflow port 12, the feeding is adjusted to be continuous feeding, and the feeding amount is gradually adjusted from small to large according to the solid asphalt melting condition.
According to the invention, the solid asphalt is melted in a split type and heated and combined manner through the melter 5 and the buffer tank 6, so that continuous melting of the asphalt is realized, and the asphalt melting efficiency is improved.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. The prebaked anode continuous asphalt melting system is characterized by comprising a melter (5) and a buffer tank (6), wherein a feed pipe (7) is arranged on the melter (5), and solid asphalt aggregate is added into the melter (5) from the feed pipe (7); a melting zone (8) for melting solid asphalt aggregate is arranged in the melter (5), the melting zone (8) comprises a primary melting zone (20) and a heating zone (21), and heating coil groups (11) are arranged in the primary melting zone (20) and the heating zone (21);
The heating coil group (11) in the preliminary melting zone (20) is used for carrying out preliminary heating melting on the solid asphalt aggregate, the fluidity of the solid asphalt aggregate is increased after the solid asphalt aggregate is heated by the preliminary melting zone (20), and the solid asphalt aggregate is gradually pressed into the heating zone (21) under the pressure of the solid asphalt aggregate which is subsequently added into the melter (5);
The heating coil group (11) in the heating zone (21) heats asphalt aggregate and forms low-temperature liquid asphalt; the melter (5) is also provided with an overflow port (12), and the low-temperature liquid asphalt flows out of the overflow port (12) and enters the buffer tank (6);
a heating coil group (11) is arranged in the buffer tank (6), and the buffer tank (6) is used for further heating the low-temperature liquid asphalt to form high-temperature liquid asphalt;
A discharge hole (16) is formed in the buffer groove (6), and a plurality of liquid discharge pipelines are communicated with the discharge hole (16); a return pipe (13) is arranged on the melter (5), and the return pipe (13) is communicated with a liquid discharge pipeline; the high-temperature liquid asphalt flows into the liquid discharge pipeline from the discharge port (16), and a part of the high-temperature liquid asphalt flows into the return pipe (13) through the liquid discharge pipeline and flows back into the melter (5) from the return pipe (13) so as to accelerate the melting of solid asphalt aggregate;
The heating coil groups (11) in the primary melting zone (20) are arranged into a plurality of inner coil groups (22), and the inner coil groups (22) are arranged at intervals in the vertical direction; each layer of inner coil (22) consists of a plurality of coil rings which are arranged at intervals in the horizontal direction, and the gaps among the coil rings of the plurality of layers of inner coils (22) gradually decrease along with the decrease of the height; the solid asphalt aggregate passes through gaps among the coil rings, and is gradually heated and melted by a plurality of inner coils (22) in the falling process of the primary melting zone (20); after being melted by the primary melting area (20), the asphalt aggregate is pressed into the heating area (21) from the bottom of the inner coil pipe (22) at the lowest part;
A temperature measuring point (17) is arranged at the overflow port (12) of the melter (5), the temperature measuring point (17) is used for detecting the temperature of liquid asphalt overflowed from the melter (5), and the opening degree of a heat conducting oil inlet valve of a heating coil group (11) in the melter (5) is controlled according to the temperature measuring result of the temperature measuring point (17), so that the melting speed and the temperature of solid asphalt are controlled;
The stirring device (10) is further arranged in the melting zone (8), the stirring device (10) comprises a stirring shaft and stirring blades (23), and the stirring device (10) is used for stirring asphalt in the melter (5).
2. The prebaked anode continuous asphalt melting system according to claim 1, further comprising a plurality of solid asphalt caching tanks (1), a crusher (4) and a liquid asphalt caching tank, wherein the solid asphalt caching tanks (1), the crusher (4), the melter (5), the buffer tank (6) and the liquid asphalt caching tank are sequentially connected; the solid asphalt cache tank (1) is used for storing solid asphalt, the bottom of the solid asphalt cache tank is provided with a quantitative feeder (2), and the quantitative feeder (2) quantitatively conveys the solid asphalt into the crusher (4); the crusher (4) crushes and mixes the solid asphalt to form solid asphalt aggregate, and the formed solid asphalt aggregate is added into the melter (5) from the feeding pipe (7); and part of high-temperature liquid asphalt formed in the buffer groove (6) is conveyed into a liquid asphalt buffer tank for storage through a liquid discharge pipeline.
3. A prebaked anode continuous pitch melting process according to any one of claims 1-2, comprising the steps of:
a. Continuously adding the mixed solid asphalt aggregate into a melter (5) from a feed pipe (7), and enabling the solid asphalt aggregate to enter a primary melting zone (20) to be primarily heated and melted by a heating coil group (11) so as to gradually increase the fluidity;
b. Under the pressure of the subsequently added asphalt aggregate, the preliminarily melted asphalt aggregate is gradually pressed into a heating area (21) from the bottom of a heating coil group (11) of a preliminary melting area (20), and the heating coil group (11) in the heating area (21) further heats the asphalt aggregate and forms low-temperature liquid asphalt;
c. With the increase of the feeding amount and the melting time, the liquid level of the low-temperature liquid asphalt in the melter (5) is gradually increased, the low-temperature liquid asphalt overflows into the buffer tank (6) from the overflow port (12), and the buffer tank (6) further heats the low-temperature liquid asphalt to form high-temperature liquid asphalt;
d. High-temperature liquid asphalt flowing out of a discharge hole (16) of the buffer groove (6) partially flows back to the melter (5) so as to accelerate the melting of solid asphalt aggregate in the melter (5);
According to the low-temperature liquid asphalt temperature detected by a temperature measuring point (17) arranged at an overflow port (12) of the melter (5), the opening degree of a heat conducting oil inlet valve of a heating coil group (11) in the melter (5) is controlled, so that the melting speed of solid asphalt and the low-temperature liquid asphalt temperature are controlled.
4. The prebaked anode continuous asphalt melting process according to claim 3, wherein the heat conducting medium in the heating coil group (11) is heat conducting oil, and the temperature of the heat conducting oil which is introduced into the heating coil group (11) is 260-280 ℃; the temperature of the low-temperature liquid asphalt formed in the processes a and b is 150-180 ℃, and the temperature of the high-temperature liquid asphalt formed in the process c is 200-220 ℃.
5. A prebaked anode continuous asphalt melting process according to claim 3, wherein the melter (5) is operated for the first time, and solid asphalt aggregate is intermittently fed into the melter (5) according to asphalt melting conditions in the melter (5); after the liquid asphalt overflows from the melter (5), the liquid asphalt is adjusted to be continuously fed, and the feeding amount is gradually adjusted from small to large according to the melting condition of the solid asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111341315.9A CN114196428B (en) | 2021-11-12 | 2021-11-12 | Prebaked anode continuous asphalt melting system and melting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111341315.9A CN114196428B (en) | 2021-11-12 | 2021-11-12 | Prebaked anode continuous asphalt melting system and melting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114196428A CN114196428A (en) | 2022-03-18 |
| CN114196428B true CN114196428B (en) | 2024-07-26 |
Family
ID=80647553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111341315.9A Active CN114196428B (en) | 2021-11-12 | 2021-11-12 | Prebaked anode continuous asphalt melting system and melting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114196428B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348725A (en) * | 2007-07-17 | 2009-01-21 | 沈阳铝镁设计研究院 | Asphalt melting apparatus and method |
| CN101586035A (en) * | 2008-05-19 | 2009-11-25 | 贵阳铝镁设计研究院 | Asphalt melting device |
| CN104691988A (en) * | 2013-12-10 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Liquid asphalt storage device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2725976C1 (en) * | 2018-02-12 | 2020-07-08 | Роудтек, Инк. | Process line for cold treatment of road pavement on-site using asphalt-cement mixture |
| CN209840710U (en) * | 2018-10-30 | 2019-12-24 | 新疆农六师碳素有限公司 | Carbon roasting furnace for recycling asphalt |
| WO2021081344A1 (en) * | 2019-10-24 | 2021-04-29 | Waterblasting, Llc | Melting kettle |
| CN213824456U (en) * | 2020-08-31 | 2021-07-30 | 永安市鼎丰碳素科技有限公司 | Asphalt melting and filtering device |
-
2021
- 2021-11-12 CN CN202111341315.9A patent/CN114196428B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348725A (en) * | 2007-07-17 | 2009-01-21 | 沈阳铝镁设计研究院 | Asphalt melting apparatus and method |
| CN101586035A (en) * | 2008-05-19 | 2009-11-25 | 贵阳铝镁设计研究院 | Asphalt melting device |
| CN104691988A (en) * | 2013-12-10 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Liquid asphalt storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114196428A (en) | 2022-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105951560B (en) | A kind of waste asphalt heating stirring machine, regenerating waste asphalt system and renovation process | |
| CN104059683B (en) | A kind of waste old continuous wave cracker and method | |
| CN212223526U (en) | Continuous asphalt mixture stirring equipment | |
| CN114196428B (en) | Prebaked anode continuous asphalt melting system and melting process | |
| CN103362050A (en) | Recycled asphalt mixture S-shaped multi-roller continuous heating device | |
| CN106350093B (en) | Continuous slag tapping system | |
| CN209816605U (en) | Asphalt mixture continuous production equipment with heat regeneration function | |
| US2631178A (en) | Installation for reclaiming flue dust | |
| CN109603376A (en) | A kind of high-temperature oil gas of waste and old rubber thermal cracking and carbon black separation system | |
| JP5682763B2 (en) | Rotary circular cooling device and method for cooling sintered ore using the same | |
| CN205917575U (en) | Old and useless pitch heating mixer of enstrophe board external fixation, heating mixing system and regeneration system | |
| CN201785012U (en) | Rubber powder flexible conveyer | |
| CN206408173U (en) | A kind of system of fast pyrogenation junked tire | |
| CN201895922U (en) | Rubber powder flexible conveying system with microwave preheating device | |
| CN104531182B (en) | Tar slag machining process and system | |
| CN108424780B (en) | Modified asphalt and continuous production method and system thereof | |
| CN215404321U (en) | Short-process cast iron production smelting device | |
| CN104560101B (en) | Continuous rubber powder cracking device and method | |
| CN2848854Y (en) | Asphalt melting unit having helical blade stirrer | |
| CN203373643U (en) | Reclaimed asphalt mixture heating device with transfer cabins | |
| CN208617779U (en) | A kind of waste plastics electric heating cracking apparatus | |
| CN101134901B (en) | Material post gravity type asphalt automatic rapid fusing method and device | |
| CN109439947B (en) | Aluminum alloy smelting agent adding equipment | |
| CN205874908U (en) | Bank of tubes formula heat transfer mixer, heating mixing system and regeneration system in pitch | |
| CN2552619Y (en) | Foundry sand roasting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |