Continuous asphalt reclaimed material hot-air circulation heating device

Abstract

The invention relates to a heating device, particularly relates to a continuous asphalt reclaimed material hot-air circulation heating device and belongs to the technical field of road engineering machinery. According to the technical scheme, the device comprises a combustion chamber, a horizontal drying cylinder is arranged below the combustion chamber, the feeding end of the horizontal drying cylinder is connected with a high-temperature flue of the combustion chamber, the discharging end of the horizontal drying cylinder is connected with an air inlet of a circulating fan, and an air outlet of the circulating fan is connected with the combustion chamber through a low-temperature flue. A combustor is arranged on the combustion chamber and is disposed above the horizontal drying cylinder and adjacent to the circulating fan. A feeding mechanism is arranged at the feeding end of the horizontal drying cylinder, and a discharging mechanism is arranged at the discharging end of the horizontal drying cylinder. The device is compact in structure, high in heating efficiency, energy saving and environmentally friendly and safe and reliable; besides, asphalt is not prone to aging during heating.

Description

technical field [0001] The invention relates to a heating device, in particular to a continuous hot air circulation heating device for regenerated asphalt material, which belongs to the technical field of road construction machinery. Background technique [0002] At present, there are two ways to heat up the old asphalt material on the pavement of various asphalt pavement hot-in-place recycling equipment at home and abroad. One is to directly bake the ground with hot air, and the other is to directly bake the ground with an open flame. These two methods have common technical defects. The heat conduction efficiency of direct heating to the road surface is low, and the ground surface temperature can reach 250 degrees Celsius, while it is only 60 degrees Celsius at a depth of 40 mm. In summer, the highest mixture temperature that can be produced is only 120 degrees Celsius, and the heating method of directly baking the ground with an open flame makes the surface temperature of ...

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Problems solved by technology

These two methods have common technical defects. The heat conduction efficiency of the direct heating method on the road surface is low. The ground surface temperature can reach 250 degrees Celsius, but only 60 degrees Celsius at a depth of 40 mm, which makes the surface temperature of the asphalt pavement too high and the asphalt ages at high temperature.

In summer, the highest mixture temperature that can be produced is only 120 degrees Celsius, and the heating method of directly baking the ground with an open flame makes the surface temperature of the asphalt pavement too high, and it is easy to catch fire, and the asphalt is seriously aged

Therefore, the asphalt mixture regenerated by the above two heating methods cannot meet the minimum temperature requirement for asphalt pavement paving, and because the asphalt is denatured by high temperature, the gradation of the mixture changes, making it difficult to meet the quality of the repaved pavement

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