CN209836738U - Modified asphalt secondary heating device - Google Patents
Modified asphalt secondary heating device Download PDFInfo
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- CN209836738U CN209836738U CN201920305189.3U CN201920305189U CN209836738U CN 209836738 U CN209836738 U CN 209836738U CN 201920305189 U CN201920305189 U CN 201920305189U CN 209836738 U CN209836738 U CN 209836738U
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Abstract
The utility model provides a secondary heating device for modified asphalt, wherein the bottom of a shell is provided with an asphalt inlet, a first temperature detector is arranged in the asphalt inlet, the asphalt inlet is connected with an asphalt storage tank through a pipeline, and the pipeline is provided with an asphalt frequency conversion pump; the top of the shell is provided with an asphalt outlet, a second temperature detector is arranged in the asphalt outlet, and the asphalt outlet is connected with the mixing tank through a pipeline; a heat conduction oil pipe spirally coiled in the inner cavity is arranged in the shell of the heating device, an oil inlet hole of the heat conduction oil pipe is formed in the lower part of the shell wall, and an oil pressure variable frequency pump is arranged on the oil inlet pipeline; the oil outlet of the heat conduction oil pipe is arranged at the upper part of the shell wall; the heat conducting oil pipe is a circular pipe core, a heat conducting oil cavity is formed in the pipe cavity, the two sides of the outer portion of the circular pipe core are fixedly connected with heat radiating plates, the diameter of the circular pipe core is 20mm, the width of each heat radiating plate is 40mm, the device is large in contact area with matrix asphalt, heat exchange is sufficient, heated asphalt is output immediately, high-temperature time is short, and the asphalt is prevented from being aged at high temperature for a long time.
Description
Technical Field
The utility model belongs to the technical field of the pitch processing, concretely relates to modified asphalt secondary heating device.
Background
Today, the production efficiency of modified asphalt equipment and the quality of finished modified asphalt become an unbelievable problem when the modified asphalt pavement is widely popularized and constructed. In order to obtain a modified asphalt pavement with excellent performance and ensure the smooth construction process, the temperature control in the processing link of the modified asphalt is very important.
The melting point of SBS modifier is about 180 deg.C, however, the heating temperature of the base asphalt (No. 70) is controlled at 145-155 deg.C. When the base asphalt is heated to 195 ℃, the base asphalt must be discarded, mainly because the volatilization of light oil components in the base asphalt is accelerated by high temperature, so that the conditions of asphalt aging, oxidation, coking and the like occur, and all indexes of the asphalt are reduced.
In the prior art, asphalt is stored in a horizontal tank, the horizontal tank not only has the storage function, but also has the heating function, and the heating medium of the horizontal tank is heat conduction oil. The heating temperature of the asphalt before production should be controlled to be about 150 ℃. Before the SBS modifier is blended and dissolved mutually, the matrix asphalt is quickly heated to 185 ℃ to meet the blending requirement.
Adopt 50 tons of horizontal tanks to carry out pitch storage and heating in traditional technology, specifically do: the temperature of the heat-conducting oil is raised to 240 ℃, because the horizontal tank is an integral inner cavity, in order to ensure that the matrix and the heat-conducting oil exchange heat evenly and fully, the body of the horizontal tank rotates or an internal stirring device is started to ensure that internal materials are turned over and inverted continuously in the heating process. The horizontal tank heating takes about 5 hours to bring the asphalt from 150 c to 185 c. The heat conducting oil is kept at the temperature of 240 ℃ for more than 5 hours, and the heat energy consumption is large. The asphalt is long in heating time, the working efficiency is low, and the asphalt can be aged at a high temperature (more than 150 ℃ for more than 5 hours) for a long time, so that the quality control is influenced.
SUMMERY OF THE UTILITY MODEL
The invention aims to solve the problems that the matrix asphalt in the prior art has long high-temperature heating time and large heat energy consumption, and the asphalt output by equipment is easy to age. The invention provides a device for quickly heating and quickly applying modified asphalt.
In order to achieve the above purpose, the utility model provides a technical scheme is:
a secondary heating device for modified asphalt comprises a shell, wherein an asphalt inlet is formed in the bottom of the shell, a first temperature detector is arranged in the asphalt inlet, the asphalt inlet is connected with an asphalt storage tank through a pipeline, and an asphalt variable frequency pump is arranged on the pipeline; the top of the shell is provided with an asphalt outlet, a second temperature detector is arranged in the asphalt outlet, and the asphalt outlet is connected with the mixing tank through a pipeline; a heat conduction oil pipe spirally coiled in the inner cavity is arranged in the shell of the heating device, an oil inlet hole of the heat conduction oil pipe is formed in the lower part of the shell wall, and an oil pressure variable frequency pump is arranged on the oil inlet pipeline; the oil outlet of the heat conduction oil pipe is arranged at the upper part of the shell wall; the heat conduction oil pipe is a circular pipe core, a heat conduction oil cavity is formed in the pipe cavity, heat dissipation plates are fixedly connected to two sides of the outer portion of the circular pipe core, the diameter of the circular pipe core is 20mm, and the width of each heat dissipation plate is 40 mm.
In the scheme, the heating body is fully arranged in the heating device, the contact area with the matrix asphalt is large, the temperature requirement of a heat source is low, heat exchange is full, the asphalt can be heated in a short time, the heated asphalt is output immediately, and the asphalt is prevented from being aged at a high temperature for a long time.
The heat conducting oil pipes are uniformly distributed in the whole inner cavity when being coiled.
The heat dissipation plate is composed of independent small plates which are arranged on the same straight line.
Drawings
FIG. 1 is a schematic view of the overall structure of a secondary heating apparatus;
FIG. 2 is a schematic view of the arrangement structure of a heat-conducting oil pipe at a depression angle of the secondary heating device;
FIG. 3 is a first view of the structure of a heat conducting oil pipe;
fig. 4 is a second structure view of the heat conduction oil pipe.
In the figure: the device comprises a shell 1, an asphalt supply inlet 2, a first temperature detector 3, an asphalt discharge outlet 4, a second temperature detector 5, a heat conduction oil pipe 6, a circular pipe core 61, a heat dissipation plate 62, an oil inlet hole 7, an oil outlet hole 8 and an oil pressure variable frequency pump 9.
Detailed Description
The design concept of the invention is that a large number of heating points are arranged in the shell of the heating device, so that the heat exchange contact area of the matrix asphalt and the heat-conducting oil is increased; heat exchange is carried out in the asphalt conveying way, so that the temperature is raised in the asphalt dynamic moving process; temperature sensors are installed at an inlet and an outlet of asphalt, the temperature of the asphalt is monitored in real time, the temperature is transmitted into a digital signal to be transmitted to a temperature controller in an operating room, the temperature controller transmits a signal to a heat conduction oil pump frequency converter in a heat conduction oil circulating system according to the set temperature and the collected actual temperature, the rotating speed of a heat conduction oil pump is adjusted by changing the frequency of the frequency converter, and the flow speed of heat conduction oil is controlled to accurately control the heating temperature of the asphalt.
The secondary heating device for modified asphalt shown in fig. 1-4 comprises a casing 1, an asphalt inlet 2 is arranged at the bottom of the casing 1, a temperature detector 3 is arranged in the asphalt inlet 2, the asphalt inlet 2 is connected with an asphalt storage tank through a pipeline, and an asphalt frequency conversion pump (not shown in the figure) is arranged on the pipeline; an asphalt outlet 4 is arranged at the top of the shell 1, a second temperature detector 5 is arranged in the asphalt outlet 4, and the asphalt outlet 4 is connected with the mixing tank through a pipeline; a heat conduction oil pipe 6 spirally coiled in the inner cavity is arranged in the heating device shell 1, an oil inlet hole 7 of the heat conduction oil pipe 6 is formed in the lower part of the outer wall of the shell, and an oil pressure variable frequency pump 9 is arranged on the oil inlet pipeline; the oil outlet 8 of the heat conduction oil pipe 6 is arranged at the upper part of the outer wall of the shell; the heat conducting oil pipe 6 is a circular pipe core 61, a heat conducting oil cavity is arranged in the pipe cavity, heat dissipation plates 62 are fixedly connected to two sides of the outer portion of the circular pipe core 61, the diameter of the circular pipe core 61 is 20mm, and the width of each heat dissipation plate 62 is 40 mm.
The device adjusts the transfer rate of the asphalt in the heating device through the asphalt variable frequency pump, and the transfer rate of the asphalt is set according to the required quantity of construction.
The device controls the flow rate of the heat conduction oil by adjusting the heat conduction oil variable frequency pump, and the temperature is higher when the flow rate is higher and the asphalt is discharged.
The utility model discloses a coil in a large number in heating device inner chamber and have heat conduction oil pipe 6 of heating panel, can the rapid heating pitch. The temperature monitoring devices arranged in the asphalt supply inlet 2 and the asphalt discharge outlet 4 are combined with a heat conduction oil variable-frequency circulating device, a frequency converter is adopted to adjust the rotating speed of a heat conduction oil pump, the flow speed of heat conduction oil is controlled, and the purpose of accurately controlling the heating temperature of asphalt is achieved.
The heating process of the device to the asphalt is as follows: the asphalt with the temperature of about 150 ℃ is pumped out from the asphalt storage tank to match the consumption required by the production of the modified asphalt, enters the secondary heating device from the asphalt oil inlet according to the set flow rate, is contacted with the heat conduction oil pipe with the radiating fins in the secondary heating device, dynamically completes large-area heat exchange of the heat conduction oil and the asphalt, and finally is output from the top discharge port.
The temperature controller controls the rotational speed of conduction oil circulating pump according to the temperature detection data that pitch was imported and exported, the utility model discloses a heating medium is the conduction oil about the temperature is 210 ℃, and the temperature is 185 ℃ when controlling pitch discharge through the velocity of flow of the conduction oil about control 210 ℃.
In summary, it is summarized that the secondary heating method of the modified asphalt comprises the following steps:
1) heating the heat-conducting oil to 210 ℃ and feeding the heat-conducting oil into a secondary heating device, and carrying out the next step when the temperatures of the heat-conducting oil pipe and the scattered plate in the tank body are expected to reach the expected temperatures;
2) heating the substrate asphalt in a storage tank to 150 ℃;
3) sending the matrix asphalt into a secondary heating device, controlling the conveying pressure of the asphalt by an asphalt variable frequency pump, enabling the asphalt to flow through the heating device at a speed which is matched with the use amount of the production requirement of the modified asphalt, exchanging heat of the asphalt with heat-conducting oil in the conveying process inside the secondary heating device, and raising the temperature again;
4) adjusting the flow rate of heat conducting oil according to the temperature of asphalt entering and discharged by the heating device, and finally controlling the temperature of the asphalt discharged to be 185 ℃;
5) the heated base asphalt is conveyed to a mixing tank to be mixed with the modifier after being conveyed out of the heating device.
When the heat conducting oil pipe is installed, the heat conducting oil pipe is spirally coiled in the inner cavity of the heating device, so that the heat conducting oil pipe has many bends, and the heat radiating plate is designed to be composed of independent small plates which are arranged on the same straight line in order to facilitate the steering and bending of the heat conducting oil pipe. The more the heat conducting oil pipes are in the inner cavity of the shell 1, the more uniform the pipe body is distributed, and the better the heating effect on the asphalt is.
The utility model discloses contrast with prior art merit shortcoming: 1. the heat conducting oil can be put into use when reaching 210 ℃ without being heated to 240 ℃, so that the fuel consumption is reduced, and potential safety hazards caused by overhigh oil temperature are avoided; 2. the matrix asphalt is not required to be heated integrally, but is heated and fed into the mixing tank at the same time, so that the aging phenomenon that the asphalt is in a high-temperature state for a long time is avoided, and the production quality of the modified asphalt is ensured; 3. the new entering substrate asphalt only needs to be heated to about 150 ℃, so that the heating time and the high-temperature storage time are shortened, the production efficiency is improved, and the heat energy loss is reduced.
The utility model is suitable for a modified asphalt and rubber asphalt's production has reduced energy resource consumption, has improved production efficiency, has guaranteed going on smoothly of work progress.
Claims (3)
1. The utility model provides a modified asphalt secondary heating device which characterized by: the asphalt mixing device comprises a shell, wherein an asphalt supply inlet is formed in the bottom of the shell, a first temperature detector is arranged in the asphalt supply inlet, the asphalt supply inlet is connected with an asphalt storage tank through a pipeline, and an asphalt variable frequency pump is arranged on the pipeline; the top of the shell is provided with an asphalt outlet, a second temperature detector is arranged in the asphalt outlet, and the asphalt outlet is connected with the mixing tank through a pipeline; a heat conduction oil pipe spirally coiled in the inner cavity is arranged in the shell of the heating device, an oil inlet hole of the heat conduction oil pipe is formed in the lower part of the shell wall, and an oil pressure variable frequency pump is arranged on the oil inlet pipeline; the oil outlet of the heat conduction oil pipe is arranged at the upper part of the shell wall; the heat conduction oil pipe is a circular pipe core, a heat conduction oil cavity is formed in the pipe cavity, heat dissipation plates are fixedly connected to two sides of the outer portion of the circular pipe core, the diameter of the circular pipe core is 20mm, and the width of each heat dissipation plate is 40 mm.
2. The modified asphalt secondary heating apparatus as claimed in claim 1, wherein: the heat conducting oil pipes are uniformly distributed in the whole inner cavity when being coiled.
3. The modified asphalt secondary heating apparatus as claimed in claim 1, wherein: the heat dissipation plate is composed of independent small plates which are arranged on the same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920305189.3U CN209836738U (en) | 2019-03-11 | 2019-03-11 | Modified asphalt secondary heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920305189.3U CN209836738U (en) | 2019-03-11 | 2019-03-11 | Modified asphalt secondary heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209836738U true CN209836738U (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920305189.3U Active CN209836738U (en) | 2019-03-11 | 2019-03-11 | Modified asphalt secondary heating device |
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| Country | Link |
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| CN (1) | CN209836738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763405A (en) * | 2019-03-11 | 2019-05-17 | 中国二十二冶集团有限公司 | Modified pitch second heating apparatus and heating means |
-
2019
- 2019-03-11 CN CN201920305189.3U patent/CN209836738U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763405A (en) * | 2019-03-11 | 2019-05-17 | 中国二十二冶集团有限公司 | Modified pitch second heating apparatus and heating means |
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