CN216275109U - Foamed asphalt device under saturated steam pressure - Google Patents
Foamed asphalt device under saturated steam pressure Download PDFInfo
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- CN216275109U CN216275109U CN202122811151.3U CN202122811151U CN216275109U CN 216275109 U CN216275109 U CN 216275109U CN 202122811151 U CN202122811151 U CN 202122811151U CN 216275109 U CN216275109 U CN 216275109U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The utility model discloses a foamed asphalt device under saturated steam pressure, which comprises a heating storage tank, an inlet end arranged at one end of the heating storage tank, an outlet end arranged at the other end of the heating storage tank, a pressure cavity arranged in the middle of the heating storage tank, a foaming cavity arranged in the heating storage tank close to the outlet end, a first one-way valve arranged at the inlet end, a pressure regulating valve arranged on the pressure cavity in the middle of the heating storage tank, a bifurcated pipe arranged between the inlet end and the middle part of the heating storage tank, a second one-way valve arranged on the bifurcated pipe, and a transverse screw rod stirrer arranged in the pressure cavity. The utility model has the advantages of small particle size of foaming foam, uniform foam, long half life period and suitability for warm-mixed asphalt and foam cold regeneration.
Description
Technical Field
The utility model relates to the technical field of asphalt concrete, in particular to a foamed asphalt device under saturated steam pressure.
Background
It was found that for bituminous pavements, the production of 0.9kg of CO2 per ton of bituminous mix was reduced for every 10 ℃ reduction in temperature during the bituminous mix production process. If the mixing temperature of the asphalt mixture can be reduced by 30 ℃ compared with the conventional temperature, the emission of CO2 of the common asphalt mixture can be reduced by 14%, and the emission of CO2 of the modified asphalt mixture can be reduced by 13%. In addition, compared with hot-mix asphalt, the use of warm-mix asphalt will save fuel consumption by 30-35%. Under the background, the foamed asphalt warm-mixing technology is produced. At present, foamed asphalt is produced by adding an asphalt foaming device before entering a mixing cylinder by utilizing an asphalt storage tank and a heating facility of a mixing plant. The used foamed asphalt is found, and the problems of foaming effect, quality of the foamed asphalt and the like can be found only after experience law. Moreover, the problems of large particle size and short half-life of the foaming foam exist; if the particle size of the foam is required to be smaller when the foamed asphalt is used for warm-mix asphalt, the conventional device with longer half-life period cannot meet the requirement.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides a foamed asphalt device under saturated steam pressure, which has the characteristics of small particle size of foamed foam, uniform foam and long half-life period and is suitable for warm-mix asphalt and cold regeneration of foam.
In order to achieve the purpose, the utility model provides a foamed asphalt device under saturated steam pressure, which comprises a heating storage tank, an inlet end arranged at one end of the heating storage tank, an outlet end arranged at the other end of the heating storage tank, a pressure cavity arranged in the middle of the heating storage tank, a foaming cavity arranged in the heating storage tank close to the outlet end, a first one-way valve arranged at the inlet end, a pressure regulating valve arranged in the pressure cavity in the middle of the heating storage tank, a bifurcated pipe arranged between the inlet end and the middle part of the heating storage tank, a second one-way valve arranged on the bifurcated pipe, and a transverse screw rod stirrer arranged in the pressure cavity. The first and second check valves thus function to prevent backflow of the asphalt in the pressure chamber. The pressure regulating valve has the function of adjusting the pressure of the pressure cavity, adapts to the foaming requirements of the asphalt at different temperatures, and ensures that water is mixed with the asphalt in a liquid state when the pressure in the reaction cavity is greater than the saturated vapor pressure at the corresponding temperature.
In some embodiments, the heating reservoir is a zigzag shaped curved tube.
In some embodiments, the furcation tubes are disposed in a turning position on a side adjacent the inlet end.
In some embodiments, the screw agitator includes a shaft extending from an outside of the heating storage tank to an inside of the pressure chamber, a motor provided on an end of the shaft outside of the heating storage tank, and a screw blade provided on the shaft inside of the pressure chamber.
Another purpose is to provide a preparation method of the foamed asphalt device under saturated steam pressure, wherein the preparation method comprises the following specific steps:
(1) pouring asphalt into a heating storage tank for heating;
(2) controlling the pressure of a pressure cavity in the heating storage tank;
(3) spraying asphalt into the pressure cavity from the inlet end of the heating storage tank;
(4) adding liquid water into the pressure cavity from a branch pipe of the heating storage tank;
(5) stirring and mixing the liquid water and the asphalt in the pressure cavity by using a screw stirrer;
(6) mixing liquid water and asphalt, and then spraying the mixture from the pressure cavity to form foamed asphalt;
(7) finally, the foamed asphalt passes through the foaming cavity and is sprayed out from the outlet. The mixed foamed asphalt is sprayed into a foaming cavity through a pressure regulating valve, and water is vaporized into water vapor under normal pressure.
In some embodiments, the asphalt is poured into a heating storage tank and heated to 125-130 ℃ as described in step (1).
In some embodiments, the pressure chamber pressure in step (2) is controlled at a saturated vapor pressure of greater than 0.25MPA to 0.3 MPA.
In some embodiments, the weight of pitch injected into the pressure chamber in step (3) is from 1.2 to 2%.
In some embodiments, the mixing in step (5) is adapted to the requirements of the warm-mix asphalt, such that the temperature of the asphalt mix is reduced by 10 ℃ to 20 ℃.
In some embodiments, the diameter of the froth in the foamed asphalt in step (6) is between 1mm and 2 mm.
The utility model has the advantages of small particle size of foaming foam, uniform foam, long half life period and suitability for warm-mixed asphalt and foam cold regeneration.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following describes the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1, a foam asphalt device under saturated steam pressure comprises a heating storage tank 1, an inlet end 2 arranged at one end of the heating storage tank 1, an outlet end 3 arranged at the other end of the heating storage tank 1, a pressure chamber 4 arranged in the middle of the heating storage tank 1, a foaming chamber 5 arranged in the heating storage tank 1 close to the outlet end 3, a first one-way valve 6 arranged at the inlet end 2, a pressure regulating valve 7 arranged at the pressure chamber 4 in the middle of the heating storage tank 1, a branch pipe 8 arranged between the inlet end 2 and the middle of the heating storage tank 1, a second one-way valve 9 arranged on the branch pipe 8, and a transverse screw stirrer 10 arranged in the pressure chamber 4. The first check valve 6 and the second check valve 9 function to prevent a backflow of the asphalt in the pressure chamber 4. The pressure regulating valve 7 has the function of regulating the pressure of the pressure cavity 4, adapts to the foaming requirements of the asphalt at different temperatures, and ensures that water is mixed with the asphalt in a liquid state when the pressure in the reaction cavity is greater than the saturated vapor pressure at the corresponding temperature.
The heating storage tank 1 is a Z-shaped curved pipe.
The bifurcated pipe 8 is disposed at a turning position on the side close to the inlet end 2.
The screw agitator 10 includes a rotating shaft extending from the outside of the heating storage tank 1 to the inside of the pressure chamber 4, a motor provided on the end of the rotating shaft outside the heating storage tank 1, and a screw piece provided on the rotating shaft inside the pressure chamber 4.
Another purpose is to provide a preparation method of the foamed asphalt device under saturated steam pressure, wherein the preparation method comprises the following specific steps:
(1) pouring asphalt into a heating storage tank 1 for heating;
(2) controlling the pressure of a pressure cavity 4 in the heating storage tank 1;
(3) spraying asphalt into the pressure cavity 4 from the inlet end 2 of the heating storage tank 1;
(4) adding liquid water into the pressure cavity 4 from a branch pipe 8 of the heating storage tank 1;
(5) stirring and mixing the liquid water and the asphalt in the pressure cavity 4 by using a screw stirrer 10;
(6) liquid water and asphalt are mixed and then are sprayed out from the pressure cavity 4 to form foamed asphalt;
(7) finally, the foamed asphalt passes through the foaming chamber 5 and is sprayed out from the outlet. The mixed foamed asphalt is sprayed into the foaming cavity 5 through the pressure regulating valve 7, and water is vaporized into water vapor under normal pressure.
Pouring the asphalt into the heating storage tank 1 to be heated to 125-130 ℃ in the step (1).
The pressure of the pressure chamber 4 in the step (2) is controlled under the condition of saturated steam pressure which is more than 0.25MPA to 0.3 MPA.
The weight of the asphalt sprayed into the pressure chamber 4 in the step (3) is 1.2-2%.
The stirring and mixing in the step (5) are adapted to the requirements of warm-mixed asphalt, so that the temperature of the asphalt mixture is reduced by 10-20 ℃.
The foam diameter of the foam asphalt in the step (6) is 1mm-2 mm.
When in use, the foam generating method is that water is evenly mixed with asphalt in a liquid state under a certain pressure condition, and the mixed water and asphalt mixed solution is sprayed out of the pressure cavity 4 and then forms foam asphalt through the vaporization of the water; when the pressure of the pressure cavity 4 is larger than the saturated steam pressure, the water and the asphalt are ensured to be mixed in a liquid state; the pressure is adjusted by adjusting the pressure valve at different asphalt temperatures, so that the requirement that water and asphalt are mixed in a liquid state is met; the size of the foam depends on the degree of dispersion of the water in the bitumen.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept herein, and it is intended to cover all such modifications and variations as fall within the scope of the utility model.
Claims (4)
1. The utility model provides a foam asphalt device under saturated steam pressure, a serial communication port, including the heating storage tank, the entrance point that is equipped with in heating storage tank one end, the exit end that is equipped with on the heating storage tank other end, be equipped with the pressure chamber in the middle part position of heating storage tank, the foaming chamber that is equipped with in the heating storage tank that is close to the exit end, the first check valve that is equipped with on the entrance point, the air-vent valve that is equipped with on the pressure chamber at heating storage tank middle part, the bifurcated pipe that is equipped with between entrance point and heating storage tank part position, the second check valve that is equipped with on bifurcated pipe, and be equipped with horizontal screw rod agitator in the pressure chamber.
2. The apparatus of claim 1, wherein the heating tank is a zigzag pipe.
3. A saturated steam pressure asphalt foam apparatus as claimed in claim 2, wherein said bifurcated pipe is provided at a turning position on a side close to the inlet end.
4. The foamed asphalt apparatus under saturated steam pressure of claim 1, wherein the screw agitator comprises a shaft extending from the outside of the heating storage tank to the inside of the pressure chamber, a motor provided at an end of the shaft outside the heating storage tank, and a screw blade provided at the shaft inside the pressure chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811151.3U CN216275109U (en) | 2021-11-16 | 2021-11-16 | Foamed asphalt device under saturated steam pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122811151.3U CN216275109U (en) | 2021-11-16 | 2021-11-16 | Foamed asphalt device under saturated steam pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216275109U true CN216275109U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122811151.3U Active CN216275109U (en) | 2021-11-16 | 2021-11-16 | Foamed asphalt device under saturated steam pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216275109U (en) |
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2021
- 2021-11-16 CN CN202122811151.3U patent/CN216275109U/en active Active
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