Heating bed for heating asphalt concrete raw materials by using waste heat of drying cylinder

Abstract

A heating bed for heating asphalt concrete raw materials by using waste heat of a drying cylinder is characterized in that a heating bed base bed is arranged on the ground of a raw material stacking bin; a U-shaped groove is formed in the base bed; a heat transmission steel plate is arranged on the U-shaped groove; a rectangular heat conducting water coiled pipe is arranged in a position, at the lower end of the heat transmission steel plate, in the U-shaped groove; one end of the rectangular heat conducting water coiled pipe is linked to a hot water lead-in main pipe; the other end of the rectangular heat conducting water coiled pipe is linked to a cold water flow-out main pipe; a steam lead-in main pipe is arranged on the external side of a material isolation wall which is arranged at the front end of the heating bed; an induced draft fan is arranged at the front end of the steam lead-in main pipe; and the induced draft fan is linked with an induced pipe which is arranged on the induced draft fan used for exhausting tail gas (steam) in an asphalt mixing plant. By using a method of arranging the induced pipe on the induced draft fan for exhausting tail gas (steam) in a drying cylinder of the asphalt mixing plant and arranging a water jacket on the periphery of a flue of a chimney, the advantage that raw materials are preheated by using heat energy of high temperature tail gas(steam) and heat energy on the flue of the chimney is realized.

Description

technical field [0001] The invention relates to asphalt pavement construction equipment for high-grade highways, in particular to a heating bed for heating asphalt concrete raw materials by utilizing the waste heat of a drying cylinder. Background technique [0002] When industrial boilers are burning and operating, a large amount of tail gas (steam) and dense smoke will be emitted from the back of the boiler. The temperature of some tail gas (steam) and dense smoke is as high as 250°C-350°C. Recycling, but directly allowing it to be discharged into the air, not only causes waste, but also pollutes the atmosphere. [0003] Especially in the current asphalt concrete production process of high-grade highways, the average thermal efficiency utilization rate of the drying cylinder for heating raw materials is about 60-70%, and the remaining 30-40% of waste heat is not fully utilized. The temperature of a large amount of tail gas (steam) and dense smoke discharged from the back ...

AI Technical Summary

Problems solved by technology

[0004] At present, in the production process of asphalt concrete, the conventional heating and mixing time is very short. Generally, only the moisture on the surface of the raw material is dried, and the moisture content inside the raw material is still very heavy. Great impact on stability

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