CN213078347U - Flue gas collecting pipe, flue gas collecting device and modified asphalt stirring tank - Google Patents
Flue gas collecting pipe, flue gas collecting device and modified asphalt stirring tank Download PDFInfo
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- CN213078347U CN213078347U CN202021082342.XU CN202021082342U CN213078347U CN 213078347 U CN213078347 U CN 213078347U CN 202021082342 U CN202021082342 U CN 202021082342U CN 213078347 U CN213078347 U CN 213078347U
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Abstract
The utility model discloses a flue gas collecting pipe, flue gas collection device and modified asphalt agitator tank, include: a main pipe and a branch pipe; one end of the main pipe is used for connecting the flue gas main pipe, and the other end of the main pipe is used for connecting the modified asphalt stirring tank; one end of the branch pipe is connected with the side wall of the main pipe, and the other end of the branch pipe is used for being connected with a flue gas outlet of the modified asphalt stirring tank. The flue gas collecting pipe, the flue gas collecting device and the modified asphalt stirring tank of the scheme can accurately collect asphalt flue gas, oil substances in the flue gas are recycled, meanwhile, the consumption of flue gas treatment is reduced, the operation is stable and reliable, and the operation cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of the pitch is modified, more specifically relates to a flue gas collecting pipe, flue gas collection device and modified asphalt agitator tank.
Background
A large amount of toxic smoke containing particles and fine liquid drops can be generated in the modification process of asphalt heating and stirring, the toxic smoke needs to be subjected to environmental protection treatment and discharged after reaching standards, and the asphalt smoke generated in the asphalt modification process is treated by a heat accumulating type incineration (RTO) furnace generally. A stirring tank group is adopted in general asphalt modification, because modified asphalt smoke contains a large number of fine liquid drops (light components in asphalt are heated and volatilized) and particulate matters (modified powder drifts along with the smoke), the liquid drops and the particulate matters form dirt with strong viscosity after being accumulated, the dirt is easily deposited and attached to a smoke pipeline and a pipe wall, the wind pressure for collecting the smoke of each modified asphalt stirring tank is different, according to test and operation tracking, the traditional pneumatic regulating valve is easy to cause that the pneumatic regulating valve is not in place to be closed or opened due to the dirt accumulated on a valve channel and a valve plate, and the effects of opening and closing and regulating cannot be achieved at all. With the improvement of the waste gas environment-friendly treatment technology, higher requirements are provided for the collection of waste gas, asphalt flue gas needs to be accurately collected, and oil in the flue gas is recycled as much as possible to reduce the load of rear-end treatment facilities; air is reduced as far as possible and is pumped into the flue gas collecting system, and the gas consumption and the running cost of the fan are reduced.
Therefore, the development of a flue gas collecting pipe, a flue gas collecting device and a modified asphalt stirring tank is expected to accurately collect asphalt flue gas, recycle oil substances in the flue gas, reduce the flue gas treatment consumption and reduce the operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a flue gas collecting pipe, flue gas collection device and modified asphalt agitator tank carry out accurate collection to the pitch flue gas to oil material in the recycle flue gas reduces the flue gas simultaneously and handles the consumption, and the operation is stable, reliable, reduces the working costs.
In order to realize the above purpose, the utility model provides a flue gas collecting pipe, include: a main pipe and a branch pipe;
one end of the main pipe is connected with the flue gas main pipe, and the other end of the main pipe is connected with the modified asphalt stirring tank;
one end of the branch pipe is connected to the side wall of the main pipe, and the other end of the branch pipe is used for being connected with a smoke outlet of the modified asphalt stirring tank.
The utility model also provides a flue gas collection device, include:
the flue gas collecting pipe is described above;
the valve assembly comprises a proportional valve and a switch valve which are arranged on the main pipe, and the proportional valve and the switch valve are positioned on one side, close to the flue gas main pipe, of the main pipe.
Optionally, the valve assembly further comprises an oil drain valve, and the oil drain valve is positioned on one side of the main pipe close to the modified asphalt stirring tank.
Optionally, the proportional valve is a manual proportional valve, the opening degree gears of the manual proportional valve include 0%, 25%, 50%, 75% and 100%, scales are arranged on the manual proportional valve, and the scales correspond to the opening degree gears one to one.
Optionally, the switch valve is a pneumatic switch valve, and the pneumatic switch valve is started and stopped with a stirrer of the modified asphalt stirring tank in a linkage manner.
Optionally, the modified asphalt mixing tank further comprises a flue gas filter, wherein a flue gas inlet and a flue gas outlet are formed in the flue gas filter, the flue gas outlet is connected to the branch pipe, and the flue gas inlet is used for being connected with a flue gas outlet of the modified asphalt mixing tank.
Optionally, the smoke outlet is in flexible connection with the branch pipe.
The utility model also provides a modified asphalt agitator tank, include:
the stirring tank comprises a stirring tank main body, wherein a stirrer is arranged in the stirring tank main body, and a flue gas outlet is formed in the stirring tank main body;
foretell flue gas collection device, flue gas collection device's the person in charge sets up along vertical direction, its bottom connect in the agitator tank main part, the top is connected in flue gas house steward, flue gas collection device's branch connection in the exhanst gas outlet, the ooff valve with the agitator is chain to be stopped.
Optionally, still include smoke filter, smoke filter set up in the exhanst gas outlet with between the branch pipe, the branch pipe with between the smoke filter, the bottom of being responsible for with be connected through the flexible coupling pipe between the agitator tank main part.
Optionally, the stirring tank body is connected with an asphalt feeding system, a modified powder feeding system, a modified asphalt discharging system, an asphalt modification circulating system, an asphalt modification grinding and circulating system and a heat conducting oil system.
The beneficial effects of the utility model reside in that:
1. the smoke collecting pipe comprises a main pipe and a branch pipe, wherein the branch pipe is connected to the side wall of the main pipe, and the branch pipe is connected to a smoke outlet of the modified asphalt stirring tank, so that smoke generated in the modified asphalt stirring tank flows into the main pipe through the branch pipe and collides with the pipe wall of the main pipe, small liquid drops are accumulated on the pipe wall of the pipeline, and the atomized liquid drop amount brought to the rear end by the smoke is reduced; the liquid drops accumulated in the main pipe automatically flow to the bottom end of the main pipe and then are discharged into the modified asphalt stirring tank for recycling, and the pipe structure adopting the scheme can recycle oils in the flue gas as much as possible, thereby not only reducing the load of rear-end processing facilities, but also recycling accumulated oil and changing waste into treasure.
2. The main pipe of the flue gas collecting device is provided with the proportional valve and the switch valve, the switch valve is responsible for switching on and off the main pipe, and the aim of adjusting the flue gas collecting wind pressure and wind volume is achieved by adjusting the opening degree of the proportional valve, so that the flue gas collection of each modified asphalt stirring tank is balanced; the traditional pneumatic governing valve has been given up to the flue gas collection device of this scheme, adopts the bivalve mode of "proportional valve + ooff valve", and the operation is stable, reliable, has avoided because of accumulated dirt leads to the valve to open on valve passageway, the valve plate, closes not in place, does not play the problem of the effect of on-off control.
3. The switch valve of the modified asphalt stirring tank is interlocked with the start and stop of a stirrer of the stirring tank, and the switch valve is opened when the stirrer starts to run, so that the flue gas generated in the modified asphalt stirring tank is collected in time; the switch valve is closed promptly when the agitator stops to move, prevents to lead to rear end flue gas to handle and the working costs risees with a large amount of air suction flue gas collection system, realizes the accurate collection of flue gas, and control convenient operation is favorable to reducing the flue gas and handles the consumption, reduces the working costs.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic view of a flue gas collecting device according to an embodiment of the present invention.
Figure 2 shows a schematic diagram of a modified asphalt mixing tank according to one embodiment of the present invention.
Description of the reference numerals
1. A main pipe; 2. a branch pipe; 3. a manual proportional valve; 4. a pneumatic on-off valve; 5. an oil discharge valve; 6. a flue gas filter; 7. a main body of the stirring tank; 8. a stirrer; 9. a flue gas outlet; 10. a flexible connection pipe; 11. a bitumen feed system; 12. a modified powder feeding system; 13. a modified asphalt discharge system; 14. an asphalt modification circulating system; 15. an asphalt modification grinding and circulating system; 16. a heat transfer oil system; 17. a flue gas main pipe.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The utility model discloses a flue gas collecting pipe, include: a main pipe and a branch pipe;
one end of the main pipe is used for connecting the flue gas main pipe, and the other end of the main pipe is used for connecting the modified asphalt stirring tank;
one end of the branch pipe is connected with the side wall of the main pipe, and the other end of the branch pipe is used for being connected with a flue gas outlet of the modified asphalt stirring tank.
Specifically, the smoke collecting pipe comprises a main pipe and a branch pipe, the branch pipe is connected to the side wall of the main pipe, and the branch pipe is connected to a smoke outlet of the modified asphalt stirring tank, so that smoke generated in the modified asphalt stirring tank flows into the main pipe through the branch pipe and collides with the pipe wall of the main pipe, small liquid drops are accumulated on the pipe wall of the pipe, and the atomized liquid drop amount brought to the rear end by the smoke is reduced; the liquid drops accumulated in the main pipe automatically flow to the bottom end of the main pipe and then are discharged into the modified asphalt stirring tank for recycling, and the pipe structure adopting the scheme can recycle oils in the flue gas as much as possible, thereby not only reducing the load of rear-end processing facilities, but also recycling accumulated oil and changing waste into treasure.
The utility model also discloses a flue gas collection device, include:
the flue gas collecting pipe is described above;
the valve component comprises a proportional valve and a switch valve which are arranged on the main pipe, and the proportional valve and the switch valve are positioned on one side of the main pipe close to the flue gas main pipe.
Specifically, a main pipe of the flue gas collecting device is provided with a proportional valve and a switch valve, the switch valve is responsible for switching on and off the main pipe, and the purpose of adjusting the flue gas collecting wind pressure and wind volume is achieved by adjusting the opening degree of the proportional valve, so that the flue gas collection of each modified asphalt stirring tank is balanced; the traditional pneumatic governing valve has been given up to the flue gas collection device of this scheme, adopts the bivalve mode of "proportional valve + ooff valve", and the operation is stable, reliable, has avoided because of accumulated dirt leads to the valve to open on valve passageway, the valve plate, closes not in place, does not play the problem of the effect of on-off control.
Further, the switch valve opens and stops the switch along with the stirring, and the proportional valve is in the on-state all the time, and the proportional valve need not often or at any time adjust, generally only need debug, adjust at pitch flue gas collecting system's debugging phase or initial stage of operation, perhaps after the operating time is longer, has accumulated the dirt in the person in charge, leads to modified asphalt agitator tank flue gas to collect when unbalanced and adjusts the proportional valve, reaches the purpose of adjusting the flue gas and collecting the wind pressure amount of wind, reaches each agitator tank flue gas and collects the equilibrium.
Optionally, the valve assembly further comprises an oil drain valve, and the oil drain valve is positioned on one side of the main pipe close to the modified asphalt stirring tank.
Specifically, the liquid drops accumulated in the main pipe automatically flow to the bottom end of the main pipe, after a certain amount of accumulated liquid drops are accumulated, the oil discharge valve is opened, and the liquid drops are discharged into the modified asphalt stirring tank for recycling, wherein a hose is adopted as a connecting pipe between the oil discharge valve and the modified asphalt stirring tank.
Optionally, the proportional valve is a manual proportional valve, the opening degree gears of the manual proportional valve include 0%, 25%, 50%, 75% and 100%, and scales are arranged on the manual proportional valve and correspond to the opening degree gears one to one.
Specifically, the manual proportional valve is discontinuous in regulating quantity, only has five gear opening degrees of 0%, 25%, 50%, 75% and 100%, and can be manually positioned and operated by matching with scales.
Optionally, the switch valve is a pneumatic switch valve, and the pneumatic switch valve is started and stopped with a stirrer of the modified asphalt stirring tank in a linkage manner.
Specifically, the on-off valve is opened when the agitator starts to operate, and is closed when the agitator stops operating.
Optionally, the modified asphalt mixing tank further comprises a flue gas filter, wherein the flue gas filter is provided with a flue gas inlet and a flue gas outlet, the flue gas outlet is connected to the branch pipe, and the flue gas inlet is used for being connected with a flue gas outlet of the modified asphalt mixing tank.
Specifically, the smoke filter is arranged to filter a large amount of liquid drops and particles, so that a small amount of liquid drops enter the smoke collecting pipe along with smoke, and the subsequent smoke treatment capacity is reduced to the maximum extent.
Optionally, the smoke outlet is in flexible connection with the branch pipe.
Specifically, because the modified asphalt mixing tank needs weighing and metering in the charging process, all pipelines connected with the tank body are in flexible connection or pipeline insertion connection.
The utility model also discloses a modified asphalt agitator tank, include:
the stirring tank comprises a stirring tank main body, wherein a stirrer is arranged in the stirring tank main body, and a flue gas outlet is formed in the stirring tank main body;
foretell flue gas collection device, flue gas collection device's the person in charge along vertical direction setting, and its bottom is connected in the agitator tank main part, and the top is connected in flue gas house steward, and flue gas collection device's branch connection is in the exhanst gas outlet, and the ooff valve opens with the agitator chain and stops.
Specifically, the switch valve of the modified asphalt stirring tank is interlocked with the start and stop of a stirrer of the stirring tank, and the switch valve is opened when the stirrer starts to run, so that the flue gas generated in the modified asphalt stirring tank is collected in time; the switch valve is closed promptly when the agitator stops to move, prevents to lead to rear end flue gas to handle and the working costs risees with a large amount of air suction flue gas collection system, realizes the accurate collection of flue gas, and control convenient operation is favorable to reducing the flue gas and handles the consumption, reduces the working costs.
Optionally, the stirring tank further comprises a flue gas filter, the flue gas filter is arranged between the flue gas outlet and the branch pipe, and the branch pipe and the flue gas filter, and the bottom end of the main pipe and the stirring tank main body are connected through a flexible connecting pipe.
Particularly, the flexible connecting pipe is convenient for weighing and metering in the feeding process.
Optionally, the stirring tank body is connected with an asphalt feeding system, a modified powder feeding system, a modified asphalt discharging system, an asphalt modification circulating system, an asphalt modification grinding and circulating system and a heat conducting oil system.
Examples
Fig. 1 shows a schematic view of a flue gas collection device of the present embodiment; fig. 2 shows a schematic view of the modified asphalt mixing tank of the present embodiment.
As shown in fig. 1 to 2, a stirrer 8 is arranged in the stirring tank main body 7, a flue gas filter 6 is arranged at a flue gas outlet 9 at the top of the stirring tank main body 7, and the flue gas collecting device comprises a flue gas collecting pipe and a valve assembly;
the flue gas collecting pipe comprises a main pipe 1 and a branch pipe 2, the main pipe 1 is vertically arranged above the stirring tank main body 7, the top end of the main pipe 1 is connected to a flue gas main pipe 17, the bottom end of the main pipe is connected to the stirring tank main body 7 through an oil drain valve 5, one end of the branch pipe 2 is connected to the side wall of the main pipe 1, and the other end of the branch pipe is connected to a smoke outlet of a flue gas filter 6 through a flexible connecting; the valve component comprises a manual proportional valve 3 and a pneumatic switch valve 4 which are arranged on the main pipe 1, the manual proportional valve 3 and the pneumatic switch valve 4 are both positioned on one side of the branch pipe 2 close to the flue gas main pipe 17, and the pneumatic switch valve 4 and the stirrer 8 in the stirring tank main body 7 are started and stopped in a linkage manner; the opening degree gears of the manual proportional valve 3 comprise 0%, 25%, 50%, 75% and 100%, and scales are arranged on the manual proportional valve 3 and correspond to the opening degree gears one to one.
In addition, the upper part of the stirring tank main body 7 is connected with an asphalt feeding system 11, a modified powder feeding system 12 (which is added below the liquid level by a screw) and an asphalt modification circulating system 14, the bottom of the stirring tank main body 7 is connected with a modified asphalt discharging system 13 and an asphalt modification grinding and circulating system 15, and the side surface of the stirring tank main body 7 is connected with a heat conduction oil system 16. The asphalt feeding system 11, the modified powder feeding system 12, the modified asphalt discharging system 13, the asphalt modification circulating system 14, the asphalt modification grinding and circulating system 15 and the heat conducting oil system 16 adopt the prior art in the field, and are not described again here.
In the process of modifying the asphalt, firstly, starting an asphalt feeding system 11 to add the asphalt into the stirring tank main body 7, simultaneously starting a stirrer 8 on the stirring tank main body 7 to stir the asphalt, starting a modified powder feeding system 12 to add the modified powder into the stirring tank main body 7 after the asphalt is added, and scattering and stirring uniformly by the stirrer 8 until the modified powder is discharged; when the stirrer 8 is started, the pneumatic switch valve 4 of the flue gas collecting device is started at the same time, and because a large amount of flue gas is generated in the tank when the stirrer 8 runs, the flue gas can be pumped into the flue gas collecting device after the pneumatic switch valve 4 is opened;
the flue gas firstly passes through the flue gas filter 6 to filter a large amount of liquid drops and particulate matters, then enters the branch pipe 2 through the flexible connection pipe 10, when entering the main pipe 1, the flue gas in the branch pipe 2 collides with the pipe wall of the main pipe 1, so that small liquid drops are accumulated on the pipe wall, the atomized liquid drop amount of the flue gas brought to the top end of the main pipe 1 is reduced, the liquid drops accumulated on the pipe wall of the main pipe 1 can automatically flow to the bottom end of the main pipe 1, and then the accumulated oil is irregularly discharged into the stirring tank main body 7 through the flexible pipe through the oil discharge valve 5 to be recycled;
the flue gas in the main pipe 1 sequentially flows into a flue gas main pipe 17 through a manual proportional valve 3 and a pneumatic switch valve 4;
the pneumatic switch valve 4 is only used for opening or cutting off the connection between the main pipe 1 and the flue gas main pipe 17, and is started and stopped with the stirrer 8 in a linkage manner, because the stirrer 8 is started when asphalt is added, the modified powder is added after the asphalt is added, and then the modified powder is scattered and stirred uniformly and the modified powder is discharged, the stirrer runs, and when the modified powder is stirred, a large amount of flue gas is generated in the tank, and the pneumatic switch valve 4 must be opened; on the contrary, materials such as asphalt and the like do not exist in the tank, the stirrer 8 does not need to be opened, and a large amount of air is pumped into the flue gas treatment system without closing the pneumatic switch valve 4, so that the rear-end flue gas treatment and operation cost is increased;
the manual proportional valve 3 does not need to be adjusted and adjusted frequently or at any time, and generally only needs to be adjusted and adjusted in the debugging period or the initial running period of the flue gas collecting device, or after the flue gas collecting device runs for a long time, dirt is accumulated in a pipeline, and when the flue gas collection of the stirring tank is unbalanced, the aim of adjusting the flue gas collecting air pressure and air quantity is achieved by adjusting the opening degree gear of the manual proportional valve 3, so that the flue gas collection of each stirring tank is balanced;
in the embodiment, the manual proportional valve 8 and the pneumatic switch valve 4 are adopted to replace the traditional pneumatic control valve, so that the problems that the pneumatic control valve cannot be closed or opened properly and cannot play a role in opening and closing and adjusting due to dirt accumulated on a valve channel and a valve plate because a large number of fine liquid drops (light components in the asphalt are heated and volatilized), particles (modified powder drifts along with the flue gas) are deposited and attached to a flue gas pipeline and a pipe wall in the modified asphalt flue gas are solved.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A flue gas collection tube, comprising: a main pipe and a branch pipe;
one end of the main pipe is connected with the flue gas main pipe, and the other end of the main pipe is connected with the modified asphalt stirring tank;
one end of the branch pipe is connected to the side wall of the main pipe, and the other end of the branch pipe is used for being connected with a smoke outlet of the modified asphalt stirring tank.
2. A flue gas collection device, comprising:
the flue gas collection tube of claim 1;
the valve assembly comprises a proportional valve and a switch valve which are arranged on the main pipe, and the proportional valve and the switch valve are positioned on one side, close to the flue gas main pipe, of the main pipe.
3. The flue gas collection device of claim 2, wherein the valve assembly further comprises an oil drain valve located on a side of the main pipe proximate to the modified asphalt agitator tank.
4. The flue gas collection device of claim 2, wherein the proportional valve is a manual proportional valve, the opening degree gears of the manual proportional valve include 0%, 25%, 50%, 75% and 100%, and scales are provided on the manual proportional valve, and correspond to the opening degree gears in a one-to-one manner.
5. The flue gas collection device of claim 2, wherein the switch valve is a pneumatic switch valve, and the pneumatic switch valve is started and stopped in linkage with a stirrer of the modified asphalt stirring tank.
6. The flue gas collection device of claim 2, further comprising a flue gas filter, wherein the flue gas filter is provided with a flue gas inlet and a flue gas outlet, the flue gas outlet is connected to the branch pipe, and the flue gas inlet is used for connecting a flue gas outlet of the modified asphalt mixing tank.
7. The smoke collection device of claim 6, wherein said smoke outlet is in flexible connection with said branch duct.
8. The utility model provides a modified asphalt agitator tank which characterized in that includes:
the stirring tank comprises a stirring tank main body, wherein a stirrer is arranged in the stirring tank main body, and a flue gas outlet is formed in the stirring tank main body;
the flue gas collecting device according to any one of claims 2 to 7, wherein a main pipe of the flue gas collecting device is arranged in a vertical direction, the bottom end of the main pipe is connected to the stirring tank main body, the top end of the main pipe is connected to a flue gas main pipe, a branch pipe of the flue gas collecting device is connected to the flue gas outlet, and the switch valve is started and stopped in a linkage manner with the stirrer.
9. The modified asphalt stirring tank of claim 8, further comprising a flue gas filter, wherein the flue gas filter is arranged between the flue gas outlet and the branch pipe, and the branch pipe and the flue gas filter, and the bottom end of the main pipe and the stirring tank main body are connected through flexible connecting pipes.
10. The modified asphalt stirring tank of claim 8, wherein the stirring tank body is connected with an asphalt feeding system, a modified powder feeding system, a modified asphalt discharging system, an asphalt modification circulating system, an asphalt modification grinding and circulating system and a heat conducting oil system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021082342.XU CN213078347U (en) | 2020-06-12 | 2020-06-12 | Flue gas collecting pipe, flue gas collecting device and modified asphalt stirring tank |
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| CN202021082342.XU CN213078347U (en) | 2020-06-12 | 2020-06-12 | Flue gas collecting pipe, flue gas collecting device and modified asphalt stirring tank |
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| CN213078347U true CN213078347U (en) | 2021-04-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913209A (en) * | 2021-10-26 | 2022-01-11 | 湖南嘉力亚新材料有限公司 | Modified asphalt melting equipment in prebaked anode production |
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2020
- 2020-06-12 CN CN202021082342.XU patent/CN213078347U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113913209A (en) * | 2021-10-26 | 2022-01-11 | 湖南嘉力亚新材料有限公司 | Modified asphalt melting equipment in prebaked anode production |
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