CN207685627U - A kind of preparation facilities of the bituminous concrete based on microwave heating - Google Patents

Abstract

The utility model discloses a kind of preparation facilities of the bituminous concrete based on microwave heating, the inside of the microwave heating equipment is tunnel type micro wave heating chamber, and the microwave heating equipment mixes and stirs tank with material and connect；The microwave heating equipment mixes and stirs tank with material and connects asphalt mixture tank by high-temperature gas siphunculus respectively, to import in asphalt mixture tank high-temperature gas with heated asphalt.Microwave heating equipment and material are mixed and stirred high heat gas in tank and dust and are imported in asphalt mixture tank by high-temperature gas siphunculus respectively by the utility model, on the one hand high-temperature gas heated asphalt can be utilized, on the other hand the effusion of dust can be reduced, pollution of the dust to environment is reduced；The utility model realizes recycling for heat energy, reduces the pollution to environment, has the preferable feature of environmental protection.

Description

A preparation device for asphalt concrete based on microwave heating

technical field

The utility model belongs to the technical field of asphalt concrete production devices, in particular to a preparation device for asphalt concrete based on microwave heating.

Background technique

The preparation process of existing asphalt concrete can be divided into hot mix and cold mix. The main equipment of the asphalt mixing plant includes asphalt heating pot, sand and gravel storage place, mineral powder bin, heating drum, mixer and weighing equipment, steam boiler, asphalt pump and pipeline, dust removal facilities, etc. Sieving and storage equipment.

In the preparation process, in the past, the sand and gravel were dried and heated first, and then mixed with hot asphalt and cold mineral powder. Later, a method of mixing wet aggregate with hot asphalt and then heating and mixing was developed. , to eliminate fly ash due to aggregate heating and drying. When the latter process is used, to prevent the moisture remaining in the mixture from affecting the service life of the asphalt concrete, it is best to use an asphalt anti-stripping agent to enhance the water resistance.

No matter what kind of process is used, the heating source is mainly diesel, gasoline, natural gas and other fuels to generate steam to heat aggregates and asphalt. The unnecessary mixing process takes a long time, consumes energy and is easy to generate dust, which requires a special dust removal device. Discharge after treatment. On the other hand, more energy is used in the evaporation step to remove the moisture contained in the aggregate.

Microwaves were introduced into the field of asphalt concrete from 2000 to 2005. Because asphalt absorbs microwaves weakly, and the aggregate must contain a high concentration of microwave-absorbing metal oxides to rapidly heat up, microwaves are generally not used directly in the preparation and preparation of asphalt concrete. Production, the existing microwave is mainly used in the repair and regeneration of asphalt pavement, microwave road deicing, snow melting, heating of renewable asphalt pavement materials, rapid heating of special aggregates and other fields.

Utility model content

The purpose of this utility model is to provide a preparation device for asphalt concrete based on microwave heating. The microwave heating device and the material mixing tank are respectively connected to the asphalt mixing tank through high-temperature gas pipes to introduce high-temperature gas into the asphalt mixing tank. , to heat the asphalt; the microwave heating device and the high-calorie gas and dust in the material mixing tank are respectively introduced into the asphalt mixing tank through the high-temperature gas pipe, on the one hand, the high-temperature gas can be used to heat the asphalt, and on the other hand, the dust can be reduced escaping, reducing the pollution of dust to the environment; the utility model realizes the recycling of thermal energy, reduces the pollution to the environment, and has good environmental protection.

The utility model is mainly realized through the following scheme: a preparation device for asphalt concrete based on microwave heating, including a powder storage tank, an aggregate storage tank, an asphalt mixing tank, a microwave heating device, a material mixing tank and a high-temperature gas pipe, The upper and lower parts of the powder storage tank are respectively provided with a powder feed port and a powder discharge port; the upper and lower parts of the aggregate storage tank are respectively provided with an aggregate feed port and an aggregate discharge port; The upper and lower parts of the asphalt mixing tank are respectively provided with an asphalt feed port and an asphalt discharge port, and the asphalt mixing tank is provided with a stirring device;

The powder storage tank is connected to the asphalt mixing tank through the powder outlet, and the asphalt mixing tank is connected to the microwave heating device through the asphalt outlet; the aggregate storage tank is connected to the microwave heating device through the aggregate outlet The inside of the microwave heating device is a tunnel-type microwave heating cavity, and the microwave heating device is connected with the material mixing tank; the microwave heating device and the material mixing tank are respectively connected to the asphalt mixing tank through a high-temperature gas duct, thereby the high temperature The gas is introduced into the asphalt mixing tank to heat the asphalt.

The microwave heating device of the utility model is the prior art and is not an improvement of the utility model, so it will not be described in detail. The microwave heating device heats through microwave radiation. The utility model adopts a working power supply, and the power supply mode of the working power supply is the prior art, so it will not be repeated. The stirring device is a prior art and is not an improvement of the present invention, so it will not be described in detail.

In order to better realize the utility model, further, it also includes a conveying device arranged inside the microwave heating device; the asphalt mixture in the asphalt mixing tank is discharged onto the conveying device through the asphalt discharge port; The aggregate in the tank is discharged to the conveying device through the aggregate outlet; the conveying device inputs the asphalt mixture and the aggregate into the heating radiation area of the microwave heating device for heating. The transmission device is an existing technology, so it will not be repeated here. The conveying device heats the aggregate and asphalt mixture slowly through the microwave radiation area, and then transports it to the mixing tank; the material can be heated to a certain temperature by controlling the conveying speed of the conveying device and the power of microwave heating, and the conveying device The conveying speed and the power of microwave heating can be set according to the production volume. The conveying speed of the conveying device and the power of microwave heating are prior art and not an improvement point of the present utility model, so they will not be repeated.

In order to better realize the utility model, further, the inner cavity of the microwave heating device is a cylindrical structure; the tunnel microwave heating cavity radiates microwaves from above to the material; the tunnel microwave heating cavity There are microwave isolation areas at both ends to prevent microwave leakage. The cylindrical radiating surface of the microwave heating device fits with the conical structure of the accumulated material, which is convenient for microwave penetration.

In order to better realize the utility model, further, the conveyor belt width of the conveying device is 0.5-2m; the length of the tunnel microwave heating cavity is 3-15m. It can ensure that the material is fully heated by radiation and ensures that the material is heated evenly.

In order to better realize the utility model, further, the powder discharge port and the aggregate discharge port are respectively provided with stop valves; the asphalt discharge port and the high-temperature gas pipe are respectively provided with check valves. Both the cut-off valve and the check valve are prior art and are not improvements of the present invention, so they are not repeated here. The setting of the check valve is to prevent the backflow of the material, and the check valve is set on the asphalt discharge port to prevent the backflow of the asphalt liquid.

In order to better realize the utility model, further, the powder feeding port, the aggregate feeding port and the asphalt feeding port are respectively provided with upper covers. It can better reduce the overflow of high-temperature dust and gas, reduce the pollution to the environment, and has better environmental protection.

The utility model aims at the lack of utilization of existing microwaves in the preparation process of asphalt concrete, resulting in high energy consumption and dust problems. The utility model designs a process for producing asphalt concrete using microwaves as energy and a corresponding integrated device. The process device of the utility model is a closed system, which effectively prevents dust, asphalt smoke and hot air from overflowing, and the heated steam and solid heat are effectively recycled.

Microwaves have a good effect on heating aggregates, because it contains 10-20% of water that absorbs microwaves well; although asphalt absorbs microwaves and has poor heating effects, the amount of asphalt in asphalt concrete is less than 10%, and heat transfer can still be used. Its temperature rises. The problem of dust generated in the production process is mainly solved by means of reducing generation, adsorption and limiting emission. On the one hand, the mixing time is reduced to reduce the generation of dust from the source; More importantly, the utility model designs the whole system as a sealed system, and reflows the high-temperature dust-laden gas to the asphalt mixing stage, which not only makes full use of the waste heat of the gas, but also absorbs the dust in the gas.

During the use of the utility model, the aggregates are measured and then enter the airtight microwave tunnel heating chamber through the closed pipeline, the powder is mixed with the heated asphalt through the asphalt storage tank, and enter the microwave heating chamber together with the aggregates, and all the materials pass through The conveyor belt moves in the cavity, the microwave heats the water and the aggregate in the aggregate, the water turns into steam, the high-temperature mixture enters the material mixing tank, and after stirring for 40-60 seconds, the asphalt concrete product is prepared and can enter the storage tank or transportation tank. At the same time, the pressure on the top of the microwave heating chamber is controlled by a valve. After a certain pressure, the heated gas and a small amount of dust, as well as the steam and dust of the material mixing tank, are blown into the asphalt storage tank through the pipeline through their own pressure, and the asphalt is initially melted into a flow state.

The beneficial effects of the utility model:

(1) The powder storage tank is connected to the asphalt mixing tank through the powder outlet, and the asphalt mixing tank is connected to the microwave heating device through the asphalt outlet; the aggregate storage tank is connected through the aggregate outlet A microwave heating device; the interior of the microwave heating device is a tunnel-type microwave heating chamber, and the microwave heating device is connected to the material mixing tank; the microwave heating device and the material mixing tank are respectively connected to the asphalt mixing tank through a high-temperature gas duct, Thus, the high-temperature gas is introduced into the asphalt mixing tank to heat the asphalt; the utility model heats the material through microwave radiation, and uses clean energy to reduce environmental pollution; the utility model introduces high-temperature dust gas into the asphalt mixing tank, on the one hand, it can Using high-temperature gas to heat asphalt, on the other hand, can reduce the escape of dust and reduce the pollution of dust to the environment; the utility model realizes the recycling of heat energy, reduces the pollution to the environment, and has better environmental protection.

(2) It also includes a conveying device arranged inside the microwave heating device; the asphalt mixture in the asphalt mixing tank is discharged to the conveying device through the asphalt outlet; the aggregate in the aggregate storage tank is discharged through the aggregate outlet The feed port is discharged to the conveying device; the conveying device inputs the asphalt mixture and the aggregate into the heating radiation area of the microwave heating device for heating; the conveying device realizes continuous online heating of the material, which can realize uniform heating of the material and improve the work efficiency at the same time. Efficiency and good practicability.

(3) The inner cavity of the microwave heating device is a cylindrical structure; the tunnel-type microwave heating cavity radiates microwaves from the top to the material; microwave isolation areas are provided at both ends of the tunnel-type microwave heating cavity to prevent Microwave leakage; the utility model improves the safety of material processing by setting a microwave isolation area in the microwave heating device.

(4) The powder discharge port and the aggregate discharge port are respectively provided with stop valves; the asphalt discharge port and the high-temperature gas pipe are respectively provided with check valves; the utility model passes the stop valve and the check valve The setting can effectively prevent the backflow of materials, speed up the progress of the process, and have high work efficiency.

Description of drawings

Fig. 1 is a process flow diagram of the utility model;

Fig. 2 is a structural schematic diagram of the utility model.

Among them: 1-Microwave heating device, 2-Asphalt mixing tank, 3-Aggregate storage tank, 4-Powder storage tank, 5-Material mixing tank, 6-Powder feeding port, 7-Aggregate feeding port, 8 - asphalt feeding port, 9-aggregate discharge port, 10-powder discharge port, 11-high temperature gas pipe.

Detailed ways

Example 1:

A preparation device for asphalt concrete based on microwave heating, comprising a powder storage tank 4, an aggregate storage tank 3, an asphalt mixing tank 2, a microwave heating device 1, a material mixing tank 5 and a high-temperature gas pipe 11, the powder The upper and lower parts of the body storage tank 4 are respectively provided with a powder feed port 6 and a powder discharge port 10; the upper and lower parts of the aggregate storage tank 3 are respectively provided with an aggregate feed port 7 and an aggregate discharge port 9 ; The top and bottom of the asphalt mixing tank 2 are respectively provided with an asphalt feed port 8 and an asphalt discharge port, and the asphalt mixing tank 2 is provided with a stirring device;

The powder storage tank 4 is connected to the asphalt mixing tank 2 through the powder outlet 10, and the asphalt mixing tank 2 is connected to the microwave heating device 1 through the asphalt outlet; The feed port 9 is connected to the microwave heating device 1; the inside of the microwave heating device 1 is a tunnel-type microwave heating cavity, and the microwave heating device 1 is connected to the material mixing tank 5; the microwave heating device 1 and the material mixing tank 5 pass through the The high-temperature gas duct 11 is connected to the asphalt mixing tank 2, so that high-temperature gas is introduced into the asphalt mixing tank 2 to heat the asphalt.

As shown in Figure 1, during the use of the utility model, the powder storage tank 4 inputs the powder into the asphalt mixing tank 2; the asphalt mixing tank 2 inputs the evenly stirred asphalt mixture into the microwave Heating device 1; the aggregate storage tank 3 feeds crushed stone aggregates into the inner cavity of the microwave heating device 1 for heating; the asphalt and aggregates are heated to form a high-temperature mixture, and then enter the material mixing tank 5 to prepare asphalt concrete.

The utility model heats materials through microwave radiation, and uses clean energy to reduce environmental pollution; the utility model introduces high-temperature dust gas into the asphalt mixing tank 2, on the one hand, the high-temperature gas can be used to heat the asphalt, and on the other hand, the dust can be reduced escaping, reducing the pollution of dust to the environment; the utility model realizes the recycling of thermal energy, reduces the pollution to the environment, and has good environmental protection.

Example 2:

This embodiment is further optimized on the basis of Embodiment 1. The inner cavity of the microwave heating device 1 is a cylindrical structure; the tunnel microwave heating cavity radiates microwaves from the top to the material; the tunnel microwave Both ends of the heating chamber are provided with microwave isolation areas to prevent microwave leakage;

It also includes a conveying device arranged inside the microwave heating device 1; the asphalt mixture in the asphalt mixing tank 2 is discharged to the conveying device through the asphalt discharge port; the aggregate in the aggregate storage tank 3 is discharged through the aggregate outlet The feed port 9 is discharged to the conveying device; the conveying device feeds the asphalt mixture and the aggregate into the heating radiation area of the microwave heating device 1 for heating.

The utility model improves the safety of material processing by setting a microwave isolation area in the microwave heating device 1; the conveying device realizes continuous on-line heating of materials, can realize uniform heating of materials, and improves work efficiency at the same time, and has better practicability .

The utility model heats materials through microwave radiation, and uses clean energy to reduce environmental pollution; the utility model introduces high-temperature dust gas into the asphalt mixing tank 2, on the one hand, the high-temperature gas can be used to heat the asphalt, and on the other hand, the dust can be reduced escaping, reducing the pollution of dust to the environment; the utility model realizes the recycling of thermal energy, reduces the pollution to the environment, and has good environmental protection.

Other parts of this embodiment are the same as those of Embodiment 1, so details are not repeated here.

Example 3:

This embodiment is further optimized on the basis of Embodiment 2. As shown in Figure 2, the powder discharge port 10 and the aggregate discharge port 9 are respectively provided with stop valves; the asphalt discharge port and the high-temperature gas The through pipes 11 are respectively provided with check valves; the powder feeding port 6, aggregate feeding port 7 and asphalt feeding port 8 are respectively provided with upper covers.

The utility model effectively prevents the reverse flow of materials through the arrangement of the cut-off valve and the check valve, accelerates the progress of the technological process, and has higher working efficiency. The utility model heats materials through microwave radiation, and uses clean energy to reduce environmental pollution; the utility model introduces high-temperature dust gas into the asphalt mixing tank 2, on the one hand, the high-temperature gas can be used to heat the asphalt, and on the other hand, the dust can be reduced escaping, reducing the pollution of dust to the environment; the utility model realizes the recycling of thermal energy, reduces the pollution to the environment, and has good environmental protection.

Other parts of this embodiment are the same as those of Embodiment 2 above, so details are not repeated here.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification or equivalent change made to the above embodiments according to the technical essence of the utility model falls within the scope of the present utility model. Within the protection scope of the present utility model.

Claims (6)

1. A preparation device for asphalt concrete based on microwave heating, characterized in that it includes a powder storage tank (4), an aggregate storage tank (3), an asphalt mixing tank (2), a microwave heating device (1), A material mixing tank (5) and a high-temperature gas pipe (11), the upper and lower parts of the powder storage tank (4) are respectively provided with a powder feed port (6) and a powder discharge port (10); The upper and lower parts of the aggregate storage tank (3) are respectively provided with an aggregate feed port (7) and an aggregate discharge port (9); the upper and lower parts of the asphalt mixing tank (2) are respectively provided with an asphalt feed port (8) and an asphalt outlet, the asphalt mixing tank (2) is provided with a stirring device; The powder storage tank (4) is connected to the asphalt mixing tank (2) through the powder outlet (10), and the asphalt mixing tank (2) is connected to the microwave heating device (1) through the asphalt outlet; The aggregate storage tank (3) is connected to the microwave heating device (1) through the aggregate outlet (9); the inside of the microwave heating device (1) is a tunnel-type microwave heating cavity, and the microwave heating device (1) Connected to the material mixing tank (5); the microwave heating device (1) and the material mixing tank (5) are respectively connected to the asphalt mixing tank (2) through the high-temperature gas pipe (11), so that the high-temperature gas is introduced into the asphalt mixing tank (2) to heat the bitumen. 2. A preparation device for asphalt concrete based on microwave heating according to claim 1, characterized in that it also includes a transmission device arranged inside the microwave heating device (1); the asphalt mixing tank (2) The asphalt mixture is discharged to the conveying device through the asphalt discharge port; the aggregate in the aggregate storage tank (3) is discharged to the conveying device through the aggregate discharge port (9); the conveying device discharges the asphalt mixture and The aggregate is fed into the heating radiation area of the microwave heating device (1) for heating. 3. A preparation device for asphalt concrete based on microwave heating according to claim 2, characterized in that, the inner cavity of the microwave heating device (1) is a cylindrical structure; the tunnel-type microwave heating cavity passes through Microwaves are radiated from above to the material; microwave isolation areas are provided at both ends of the tunnel microwave heating chamber to prevent microwave leakage. 4. a kind of asphalt concrete preparation device based on microwave heating according to claim 2, is characterized in that, the conveyer belt width of described conveying device is 0.5-2m; The length of described tunnel type microwave heating cavity is 3-15m . 5. A preparation device for asphalt concrete based on microwave heating according to any one of claims 1-4, characterized in that the powder outlet (10) and the aggregate outlet (9) are respectively A cut-off valve is provided; the asphalt outlet and the high-temperature gas pipe (11) are respectively provided with check valves. 6. A preparation device for asphalt concrete based on microwave heating according to any one of claims 1-4, characterized in that, the powder feeding port (6), the aggregate feeding port (7) and the asphalt feeding port The ports (8) are respectively provided with upper covers.