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

A technology of raw materials and asphalt concrete, which is applied in the field of asphalt pavement construction equipment, and can solve the problems of short heating and mixing time, heavy water content of raw materials, and great influence on the stability of asphalt concrete.

Inactive Publication Date: 2018-09-18
SICHUAN CHUANJIAO ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Type A: a heating bed that utilizes the waste heat of the drying cylinder for heating asphalt concrete raw materials

[0023] It is characterized in that: a heating bed base bed 1 is arranged on the ground of the raw material storage bin, a U-shaped groove 2 is arranged on the base bed, and a heat transfer steel plate 9 is arranged on the U-shaped groove 2 ; An exhaust channel and a partition wall 3 are provided at the rear end of the heating bed, and a partition wall 5 is provided at the front end of the heating bed.

Embodiment 2

[0025] Type B: a heating bed for asphalt concrete raw material heating by using the waste heat of the drying cylinder

[0026] This type of heating bed using the waste heat of the drying cylinder for heating the asphalt concrete raw materials is basically the same as the A-type heating bed using the waste heat of the drying cylinder for heating the asphalt concrete raw materials. The outer side is provided with a steam introduction main pipe 6, and an induced draft fan 7 is arranged at the front end of the steam introduction main pipe; an exhaust pipe 4 is provided at the exhaust passage provided at the rear end of the heating bed and at the end of the exhaust passage of the partition wall 3, The bottom of the wall is provided with a drainage ditch 8; the induced draft fan 7 on the steam introduction main pipe is connected with the induced draft pipe provided at the induced draft fan for exhausting tail gas (steam) of the asphalt mixing plant.

Embodiment 3

[0028] Type C: a heating bed that utilizes the waste heat of the drying cylinder for heating asphalt concrete raw materials

[0029] This type of heating bed using the waste heat of the drying cylinder for heating the asphalt concrete raw materials is basically the same as the A-type heating bed using the waste heat of the drying cylinder for heating the asphalt concrete raw materials. A hot water introduction main pipe 11 is provided on the outside, a rectangular water conduction coil 10 is provided in the U-shaped groove 2 on the base bed at the lower end of the heat transfer steel plate 9, and a cold water outflow main pipe 12 is provided outside the partition wall provided at the rear end of the heating bed. One end of the rectangular hot water coil 10 is connected to the hot water inlet main pipe 11, and the other end is connected to the cold water outflow main pipe 12; On the hot water output pipe of the waste heat function "flue with water jacket" (for example, a utilit...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/08
CPCE01C19/08
Inventor 刘刚罗德高李晓茂唐国华李青洋刘自金左孔海李亚舟汪银燕黄云林杨勇万美萱
Owner SICHUAN CHUANJIAO ROAD & BRIDGE
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