Drying system is one of the main components of asphalt concrete mixing equipment, and its main function is used for heating and drying aggregates, and heated them to get high quality asphalt concrete to the required temperature. To eliminate moisture in the aggregates, drying system must provide a certain amount of heat, its caloric value changes according to the drying drums of different sizes, so you can aggregate water dried into steam, and the aggregate is heated to the desired temperature.

Drying drum is rotating, cylindrical shell structure. Cold bin unit belt out of aggregate from the feed box into the drum, direct contact with the gas burner is dry, while heating up to the set temperature, flow from the aggregate exit chute into the hot stone elevator.

Drying drum cylinder by heat-resistant, wear-resistant steel plate welded into the boiler, before and after the heat of thermal expansion, can be caused by high temperature deformation.

Between the bracket and the horizontal plane of the cylinder has a tilt angle, aimed at making the drying cylinder in a tilted position, to repeatedly raise aggregate in roller moving forward in the process of moving towards the discharge end. In order to improve heat efficiency of drying roller, must be limited as much as possible from the air cylinder and inlet and outlet box joints in the dryer. A sealing device located in front of the aggregate export, labyrinth seals, you can adjust the box to adjust its position on space to reduce air leakage. Front of the sealing device located in the entrance of the aggregate, for the contact seals, through the installation of heat-resistant, wear-resistant rubber seal in the roller touches the feed box sealing rings and seals. The installation position can be adjusted in the radial rubber seal, wear can be compensated. When the drum when it is in working condition and make adjustments to the ends of the sealing device is not allowed, to avoid danger.

Used to drive the rotation of the drum gear, using friction drive, 4 driving wheels are driven. When the drive wheel is in working condition, and not allowed to touch the drive wheel and tyre, to avoid danger.

Feed box in the bracket near the side of the tyre side thrust rollers. Thrust roller drum longitudinal fixed in position, but bearing in mind two thrust rollers must be properly adjusted so that they do not work in the same time. When thrust when the wheel is working, not allowed to touch the thrust roller and roll ring, to avoid danger.

In order to aggregate evenly in the drum to move on, and can fully absorb heat, drum blade equipped with rows of bending to shape.

Drum internal structure according to the function points, mainly consists of the following four parts:

1, the feed area. This part of the blade screw blade, which will aggregate into the drum and moved forward quickly.

2, heat exchange area. To strengthen the gas and heat exchange between the aggregates, blades are designed to aggregate was promoted several times and freedom lies here, form a uniform shade, so that gas can fully through the curtain and heat exchange with the aggregate.

3, burn zone. To allow fuel to burn completely in the section is equipped with a special kind of absorption of heat rise systems. It can aggregate is mentioned in the process of moving forward and falling against the cylinder wall and not block the flame, and can achieve the objective within the drum heating aggregates. But also may reduce aggregate the fuel drop crashed down due to mechanical incomplete combustion of the loss, cut through the cylinder wall heat loss, reduce heat radiation damage to the cylinder wall.

4, discharge area. It will aggregate rapidly brought into the hopper outlet chute unloading of aggregates.