Production process flow for thermally recycled asphalt concrete

Abstract

The invention discloses a production process flow for hot recycled asphalt concrete, which comprises the following steps: asphalt pavement recycled materials are added into a cold material bin, the asphalt pavement recycled materials comprise asphalt, an asphalt regenerant, newly added mineral powder and the asphalt pavement recycled materials, the cold material bin is used for conveying block materials into an inner barrel of a drying barrel through a flow belt scale in a weighing manner, and the inner barrel of the drying barrel is used for drying the block materials; meanwhile, asphalt recycling fine materials enter an outer barrel of the double-layer drying barrel, the asphalt pavement recycling materials are heated and dried by the drying barrel and then are conveyed to the storage bin, and the materials in the storage bin enter the weighing and fine metering bin to be accurately weighed. The invention aims to provide a production process flow for thermally recycled asphalt concrete, so as to solve the problems of low production efficiency, inaccurate metering and non-uniform stirring caused by the fact that the thermally recycled asphalt concrete production process has some defects and a fixed weighing method is mostly adopted for proportioning production.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt concrete, and in particular to a production process for hot-regenerated asphalt concrete. Background Art

[0002] Hot recycled asphalt concrete is a recycling technology for asphalt pavement recycled materials. It restores the performance of aged asphalt pavement recycled materials through on-site mixing heating, adding regeneration agents and new asphalt materials, re-proportioning asphalt recycled materials for heated mixing, etc. It is mainly suitable for asphalt pavement maintenance and repair projects, especially when the pavement is aging, cracked, rutting and other problems occur. By recycling old asphalt pavement materials and reusing them, the use of new materials is reduced, resources are saved, and hot recycling technology can significantly reduce costs:

[0003] The existing hot-regenerated asphalt concrete production process has some shortcomings. Most of them use a fixed weighing method to carry out proportioning production, which has problems such as low production efficiency, inaccurate measurement, and uneven mixing, affecting the production quality. Summary of the invention

[0004] The purpose of the present invention is to provide a process flow for producing hot-regenerated asphalt concrete to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution, a process flow for producing hot regenerated asphalt concrete, comprising the following steps:

[0006] Adding asphalt pavement recycled materials into the cold material bin, wherein the asphalt recycled materials include asphalt, asphalt regeneration agent, newly added mineral powder and asphalt pavement recycled materials;

[0007] The cold material bin uses a flow belt scale and weighing to transport the block material to the elevator to the inner cylinder of the drying drum for heating and drying. At the same time, the fine asphalt recycled material enters the outer cylinder of the double-layer drying drum for heating and drying. After drying, the asphalt recycled material is transported to the storage bin;

[0008] The materials in the storage bin enter the weighing precision bin for accurate weighing;

[0009] The weighed material enters the mixer and is mixed with the asphalt in the asphalt tank, and the finished product is finally discharged.

[0010] Preferably, the asphalt pavement recycled material is transported to a cold material bin via a loader and pre-processed by crushing and screening.

[0011] Preferably, the cold material bin controls the delivery amount of the asphalt pavement recycled material through a flow belt scale and a weighing device.

[0012] Preferably, the belt conveyor is used to transport the recycled material to the elevator.

[0013] Preferably, the elevator is used to lift the recycled material into the inner drum of the drying drum for heating and drying.

[0014] Preferably, the outer cylinder of the double-layer drying cylinder is used to heat and dry the fine material.

[0015] Preferably, the storage bin is used to store the dried asphalt pavement recycled material.

[0016] Preferably, the weighing precision metering bin is used to accurately weigh the asphalt pavement recycled material.

[0017] Preferably, the agitator is used to evenly mix the asphalt pavement recycled material and new asphalt.

[0018] Preferably, the finished product is hot-regenerated asphalt concrete.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can accurately control the delivery amount of asphalt pavement recycled materials and fine materials through the flow belt scale, weighing device and weighing precision metering bin, ensure the accurate proportion of the mixture, thereby improving the quality of the final product. The use of a double-layer drying drum can heat and dry the fine materials and block materials at the same time, improve production efficiency, save energy and time, realize the recycling of asphalt pavement recycled materials, and reduce waste.

[0021] 2. The entire production process of the present invention reduces manual operation and improves production efficiency and safety through the use of flow belt scales, weighing devices, conveyor belts, elevators and other automated equipment. Thermal regeneration technology reduces the mining and use of new materials and reduces the impact on the environment, meeting the requirements of sustainable development. By accurately controlling the use of materials and improving production efficiency, production costs can be reduced while improving the market competitiveness of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a process schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the process flow of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1 to Figure 2 , a process flow for hot recycled asphalt concrete production:

[0028] The method comprises the following steps: adding recycled asphalt pavement materials into a cold material bin, wherein the recycled asphalt pavement materials include asphalt, asphalt regeneration agent, newly added mineral powder and recycled asphalt mixture materials, adding the recycled asphalt pavement materials into the cold material bin by a loader, and ensuring that they are weighed in accordance with the proportion required by the flow belt scale design after entering the cold material bin;

[0029] The cold material bin conveys the block materials to the elevator and then to the inner cylinder of the drying drum through the flow belt scale and weighing. At the same time, the fine material of the asphalt pavement recycling material enters the outer cylinder of the double-layer drying drum for heating and drying. The cold material bin controls the conveying amount of the block materials through the flow belt scale and weighing device to ensure accurate material ratio.

[0030] The drying drum heats and dries the recycled asphalt pavement material and then transports it to the storage bin, while the fine material enters the outer drum of the double-layer drying drum for heating and drying and then transported to the storage bin at the same time;

[0031] The asphalt pavement recycled materials in the storage bin enter the weighing precision metering bin for accurate weighing. The weighing precision metering bin can be adjusted automatically or manually to ensure that the amount of material mixed each time meets the production requirements;

[0032] The weighed material enters the mixer and is mixed with the asphalt in the asphalt tank. In the mixer, the material and asphalt are fully mixed to ensure that the asphalt is evenly coated on the surface of the mineral particles to form a uniform asphalt concrete mixture. The final finished product is discharged, which can effectively utilize old asphalt pavement materials, reduce the use of new materials, reduce costs, and at the same time improve the quality and construction efficiency of asphalt concrete.

[0033] Reference Figure 1 to Figure 2 The asphalt pavement recycled material is transported to the cold material bin by a loader, and the asphalt mixture recycled material is pre-processed by crushing and screening. By crushing and screening, the large pieces of material in RAP can be reduced to a size suitable for reuse, thereby ensuring that these materials can be effectively reintegrated into new asphalt mixtures, reducing the use of new materials, reducing costs, and thus improving the quality of the final product. By precisely controlling the particle size and gradation of RAP, the pavement performance of recycled asphalt concrete can be optimized, such as improving its crack resistance, water damage resistance and durability.

[0034] Reference Figure 1 to Figure 2 The cold material bin controls the delivery volume of the asphalt pavement recycled material through the flow belt scale and weighing device. The flow belt scale and weighing device can accurately measure and control the flow of the asphalt pavement recycled material to ensure that the proportion of the mixture meets the design requirements, thereby ensuring the quality of the final product. The automated flow belt scale and weighing device can reduce manual operation errors and labor intensity, and improve production efficiency. The device is equipped with a data recording function, which can record the flow and weight of the material in real time, which is convenient for production monitoring and quality traceability. Accurate measurement can avoid material waste, reduce energy consumption, and comply with the production concept of energy saving and consumption reduction.

[0035] Reference Figure 1 to Figure 2 The outer cylinder of the double-layer drying cylinder is used to heat and dry the fine materials. The design of the double-layer drying cylinder can utilize heat energy more effectively because heat exchange can be formed between the inner and outer cylinders to reduce heat loss. During the drying process, the fine materials can be heated more evenly due to the rotation of the cylinder and the heat exchange between the inner and outer cylinders, thereby ensuring the drying quality of the fine materials and improving the overall production efficiency.

[0036] Reference Figure 1 to Figure 2 The storage bin is used to store the dried materials to ensure that the materials maintain a suitable temperature before entering the mixer. Automated material storage reduces the need for manual operation, reduces labor intensity, and improves production safety.

[0037] Reference Figure 1 to Figure 2 The weighing precision metering bin is used to accurately weigh materials. By accurately controlling the amount of materials used, material waste can be reduced and production costs can be reduced. The weighing precision metering bin is suitable for a variety of materials, including powder materials, granular materials, etc., and can meet different production needs.

[0038] Reference Figure 1 to Figure 2 The agitator is used to mix the material and asphalt evenly. An efficient agitator can complete the mixing of a large amount of materials in a short time, thereby improving production efficiency.

[0039] Working principle: Add asphalt pavement recycled materials into the cold material bin. The asphalt pavement recycled materials include asphalt, asphalt regeneration agent, newly added mineral powder and asphalt mixture recycled materials. The fine materials including asphalt, asphalt regeneration agent, newly added mineral powder and asphalt mixture recycled materials (RAP) are added to the cold material bin by a loader. The cold material bin conveys the block materials to the elevator to the inner cylinder of the drying drum through the flow belt scale and weighing. At the same time, the fine materials enter the outer cylinder of the double-layer drying drum. The cold material bin controls the conveying amount of block materials through the flow belt scale weighing device to ensure accurate material ratio. The drying drum is weighing the asphalt pavement recycled materials. After heating and drying, the material is transported to the storage bin and then enters the weighing precision metering bin for accurate weighing. The weighing precision metering bin can be adjusted automatically or manually to ensure that the amount of material mixed each time meets the production requirements. The weighed material enters the agitator and is mixed with the asphalt in the asphalt tank. In the agitator, the material and asphalt are fully mixed to ensure that the asphalt is evenly coated on the surface of the asphalt pavement recycled material particles to form a uniform asphalt concrete mixture. The final finished product is discharged, which can effectively utilize old asphalt pavement materials, reduce the use of new materials, reduce costs, and at the same time improve the quality of asphalt concrete and construction efficiency.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A process flow for producing hot regenerated asphalt concrete, characterized in that: The following steps are involved: Adding asphalt pavement recycled materials into the cold material bin, wherein the recycled materials include asphalt, asphalt regeneration agent, newly added mineral powder and asphalt pavement recycled materials; The cold material bin conveys the block material to the elevator through the flow belt scale and weighing to the inner cylinder of the drying cylinder for heating and drying, while the fine material enters the outer cylinder of the double-layer drying cylinder; The drying drum dries the recycled asphalt pavement material and then transports it to the storage bin; The materials in the storage bin enter the weighing precision bin for accurate weighing; The weighed material enters the mixer and is mixed with the asphalt in the asphalt tank, and the finished product is finally discharged.

2. A process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The asphalt pavement recycled material is transported to a cold material bin by a loader and pre-processed by crushing and screening.

3. The process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The cold material bin controls the delivery amount of the asphalt pavement recycled material through a flow belt scale and a weighing device.

4. The process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The outer cylinder of the double-layer drying cylinder is used for heating and drying fine materials, and the inner cylinder is used for heating and drying block materials.

5. The process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The storage bin is used to store the dried materials.

6. The process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The weighing precision metering bin is used for performing secondary precise weighing of materials.

7. The process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The agitator is used to mix the material and the asphalt evenly.

8. The process flow for producing hot regenerated asphalt concrete according to claim 1, characterized in that: The finished product output is hot-regenerated asphalt concrete.

Images