A new type of asphalt old material heating device

Abstract

The invention provides a novel waste pitch heating device. The novel waste pitch heating device comprises a base and a combustor and is characterized by further comprising a combustion chamber; the combustor, the combustion chamber and a heating assembly are arranged on the base, the combustor and the combustion chamber are fixedly connected in a sealed mode and fixedly connected with the base through a moving assembly, the two ends of the heating assembly are fixedly connected with the base, and the middle of the heating assembly is fixedly connected with the base; the combustion chamber makes contact with the heating assembly in a sealed mode, a hot air circulating assembly is arranged above the heating assembly and fixedly connected with the base, a first inlet of the hot air circulating assembly is connected with a discharging part in a sealed mode, and a third outlet of the hot air circulating assembly is connected with a feeding part in a sealed mode. During use, combustion hot air enters the heating assembly, normal-temperature waste pitch enters a rotating heating drum from the feeding part, is guided to the bottom of the heating drum through a spiral guiding plate and pushed downwards to a V-shaped plate of a scraping conveying section, moves forwards in a fluctuation mode, is heated by the heating drum, and forms a material curtain for full heat exchange, and the waste pitch is discharged from a discharge port when heated to the needed temperature.

Description

technical field [0001] The invention relates to road machinery, in particular to an asphalt mixing station, which is a new type of asphalt old material heating device. Background technique [0002] With the rapid development of my country's highway and airport construction, by the end of 2015, among the 4.5 million kilometers of roads that have been opened to traffic, 850,000 kilometers of roads are dominated by asphalt roads. [0003] At present, many highways have entered the period of major and intermediate repairs. If the design life of asphalt pavement is 15-20 years, from now on, 10% of asphalt pavement in the country needs to be renovated every year, and the waste of old asphalt layer will reach 3.5 million tons. If it can be recycled, it can save more than 500 million yuan in material costs every year. And this figure is increasing at a rate of 15% per year. It is estimated that after 10 years, the old asphalt mixture produced by major and intermediate repairs of ...

AI Technical Summary

Problems solved by technology

[0006] First, the burner has no temperature protection, and the temperature is difficult to control, which leads to aging and flammability of old asphalt materials when heated, and the burner head and electrical components are easily damaged by the high temperature of the combustion chamber;

[0007] Second, the refractory bricks in the combustion chamber are easy to fall off, and the maintenance volume is large;

[0008] Third, the chute of the feed inlet in the prior art has a small diameter and an inappropriate angle. Because the asphalt old material has poor fluidity, it is easy to stick and block the chute during the process of entering the drum through the feed inlet, often causing production interruption;

[0009] Fourth, the heating drum in the prior art has an internal structure of a bent plate type scraper. During the heating process, the heating temperature of the asphalt old material is 80°C-120°C, which cannot meet the heating needs of the asphalt old material, and the blending ratio is general It is about 20%, the recycling rate of asphalt old materials is not high, it is easy to stick, agglomerate remains, accumulates more, the weight load of the drum increases, it is difficult to start, and the bonded asphalt sand is difficult to clean; the temperature is difficult to control, and it is easy to on fire;

[0010] Fifth, in the prior art, the hot air circulation air inlet is set at the combustion head of the burner, which affects the quality of the flame;

[0011] Sixth, the existing technology uses infrared temperature measurement, which has poor accuracy and difficulty in temperature measurement

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