High-reference plant-mixed heat regeneration equipment

Abstract

The invention relates to high-reference plant-mixed heat regeneration equipment which comprises a first regeneration drying drum and a second regeneration drying drum which are arranged at intervals,and a first discharge box and a second discharge box on the first regeneration drying drum and the second regeneration drying drum are respectively communicated with a first air outlet pipe and a second air outlet pipe of a hot air hearth. The high-reference plant-mixed heat regeneration equipment is simple in structure, coarse and fine materials can be separately heated; coarse and fine materialsare respectively dried and heated through independent regeneration drying rollers; the temperature of coarse and fine materials is easier to control; particularly, fine materials are controlled; therotating speed of the regeneration drying drum is controlled through frequency conversion, so that the adding amount of the fine aggregate can be controlled by selecting different rotating speeds; thedischarging temperature of the fine aggregate can be effectively guaranteed by adjusting the size of the adjusting air door in a matched mode, coarse materials and fine materials are heated separately through the two rollers, the discharging temperature of the recycled coarse materials and the discharging temperature of the recycled fine materials can be effectively controlled, the yield of the recycled materials is effectively increased, and the high reference ratio of the recycled materials is achieved.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture thermal regeneration equipment, in particular to a high-reference plant-mix thermal regeneration equipment. Background technique [0002] Asphalt mixture hot recycling technology is a technology to recycle waste asphalt mixture. In the existing plant-mixed hot recycling technology, cold waste asphalt mixture of various grades is sent to the drying heating system at the same time for drying. After dry heat treatment, it is mixed with a certain proportion of new aggregate, asphalt, mineral powder, etc., and finally a qualified asphalt mixture is produced. However, this plant-mixed heat regeneration method currently has the following problems: [0003] 1. The coarse and fine materials in the waste asphalt mixture enter the drying drum for heating at the same time. It is difficult to ensure the uniformity of heating of the coarse and fine materials. Under the same environment, the fine aggreg...

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Problems solved by technology

[0003] 1. The coarse and fine materials in the waste asphalt mixture enter the drying drum for heating at the same time. It is difficult to ensure the uniformity of heating of the coarse and fine materials. Under the same environment, the fine aggregate is easier to be heated than the coarse aggregate, so it is very easy to cause the fine The temperature is too high during the heating process, which leads to serious aging of the asphalt on the surface of the fine material; since the content of asphalt in the fine material accounts for a large proportion of the waste asphalt mixture, once the asphalt in the fine material has aging problems, it will greatly reduce the waste and old asphalt mixture. The quality of raw materials will ultimately affect the quality of finished materials

[0004] 2. The fine material in the waste asphalt mixture is directly put into the mixing tank. This method has the following disadvantages. The fine material is directly put into the mixing tank without being dried and heated for mixing with high-temperature raw materials or recycled materials. , a large amount of water vapor will be generated instantly, causing the negative pressure pipeline of the original equipment to be easily blocked, and it is very easy to cause a positive pressure in the mixing tank instantaneously, causing the soft connection part of the original equipment to fall off, eventually causing a large amount of dust and asphalt smoke to come out, seriously It pollutes the environment and endangers the safety of operators; and the addition of fine materials is very limited. If a large amount of fine materials that have not been dried and heated are added to the mixing tank, the quality of the finished material will be affected;

[0005] 3. There is a way to put the fine material into the mixing tank through a conveying device that can realize the preheating function (such as screw conveying, etc.). The space of the conveying device is small, and the fine material is not easy to form heat exchange inside, so this method cannot realize the addition of fine material with a higher output, so that the high reference function of recycled material cannot be realized

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