Asphalt pavement in-place hot recycling heating device

Abstract

The invention discloses an asphalt pavement in-place hot recycling heating device. The asphalt pavement in-place hot recycling heating device comprises a traveling mechanism and a heating system used for heating an asphalt pavement, wherein the heating system comprises a hot air generator used for generating hot air and a heating chamber used for guiding the hot air to the asphalt pavement and then heating the asphalt pavement, the lower end of the heating chamber is open, the open end is buckled on the asphalt pavement to be closed, and the heating chamber and the hot air generator are communicated with each other through an air intake channel and an air return channel in a circulating manner. The asphalt pavement in-place hot recycling heating device provided by the invention can be used for recycling low-temperature hot air after heat energy transfer with the pavement, and compared with the prior art, the asphalt pavement in-place hot recycling heating device can improve the utilization ratio of heat energy, reduce the heat energy loss and environmental pollution, save energy, reduce the construction cost, and realize sufficient and effective heat energy transfer between the hot air and the asphalt pavement so as to improve the heating depth and temperature, reduce the fuel consumption, save the energy and reduce the construction cost under the condition of reaching the required heating depth and temperature.

Description

technical field [0001] The invention relates to a pavement engineering construction machine, in particular to an in-situ thermal regeneration heating device for an asphalt pavement used for heating an old asphalt pavement in the process of repairing an asphalt pavement defect. Background technique [0002] Hot-in-place regeneration is a preventive maintenance technique. Use special hot-in-place recycling equipment to heat and mill the asphalt pavement, add a certain amount of new asphalt, new asphalt mixture, regeneration agent, etc. on the spot, and go through hot mixing, paving, rolling and other processes. It is a technology to realize the regeneration of old asphalt pavement within a certain depth range. In this technology, after the asphalt pavement has been compacted and driven for a long time, its strength is high, and it is difficult to mill and excavate. The asphalt pavement is heated first to make the mixture soft, and then it is relatively easy to shovel and dig....

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Problems solved by technology

[0003] The heating methods of asphalt pavement in the prior art mainly include microwave heating and combustion fuel heating. Among them, microwave heating can reach a greater heating depth, but its high cost is prohibitive, and it is difficult to popularize and apply; Generally, there are many types of such heating devices with different heating effects, and their structures generally consist of a combustion part, a heating part for guiding the hot air generated by the combustion part to the road surface to realize road surface heating, and a drive for providing power for the hot air flow. Partial composition, by continuously introducing the outside air into the combustion part and mixing with the gas generated by the combustion, and then directing it to the road surface, the hot air and the road surface can be transferred through heat exchange. The fuel can be liquefied gas, and the cost is relatively low. The heat exchange time with the pavement is short, and the heat transfer is not sufficient. The in-situ thermal regeneration depth of the old asphalt pavement is generally below 6cm, which can only regenerate the asphalt surface layer, and cannot repair the deep-seated diseases of the asphalt pavement. And the low-temperature hot air after heat exchange with the road surface is directly discharged into the atmosphere, which not only causes waste of heat energy, but also increases the emission of greenhouse gases, which is not conducive to environmental protection

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