Treatment technique to recycle flue gas from heated asphalt mixture

Abstract

A treatment technique to recycle flue gas from heated asphalt mixture is provided. A wet dust remover is applied to an air passage of a regenerating heating drying barrel to remove oil, powder and fine particles in the flue gas; the cleaned flue gas is passed through activated carbon or is introduced into a raw material drying barrel for secondary heating, so that the flue gas meets the environmental emission requirements. The flue gas is pretreated herein to obtain clean flue gas that is then treated in other ways, so that post-treatment efficiency can be greatly improved, service cycle of abag can be extended, service life of a late environmental treatment apparatus is extended, pollution by recycled powder is reduced, and availability is improved.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture treatment, in particular to a processing method for recovering flue gas after heating the asphalt mixture. Background technique [0002] In the current technical field of adding recycled recycled materials mixed with heat in the factory, the use of a separate drying cylinder heating process generally involves heating the old materials through a recycled drying cylinder with a special structure. The principle of heating is to use hot air and heat radiation to exchange heat through the material curtain formed by asphalt reclaimed material in the regeneration drying drum, soften the asphalt in the asphalt reclaimed material, remove the moisture in the reclaimed material, and increase the temperature of the reclaimed material, so as to be compatible with After the new hot aggregate is mixed, it is stirred in a mixing pot, and powder and asphalt are added to form an asphalt mixture that meets t...

AI Technical Summary

Problems solved by technology

In the first method, due to the existence of oil mist and fine powder in the flue gas, the damage to the bag filter is very serious, and the bag is quickly blocked by oil and loses its function.

In the second method, due to the relatively large amount of flue gas, the air volume in the air-oil ratio of the original drying cylinder burner cannot fully use the flue gas. function, but it will cause the important parts inside the burner to be quickly polluted (blower, fuel injection gun, flame control components, control elements, etc.), which will affect the combustion performance and safe and stable operation; if the smoke is added to the outside of the flame, Due to the low temperature outside the flame, it can only achieve the effect of deodorization

Causes sticking, wear, damage to the induced draft fan impeller, damper and other components of the induced draft fan, and a very large amount of maintenance

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