Preheater | Martec Recycling Corporation

By: Martec  09-12-2011
Keywords: Heating, Stainless Steel, Hydraulics

Basic Design

The AR2000 Preheater is designed to heat and soften asphalt pavement. The patented heating system provides effective heat penetration, which prepares the pavement for further treatment.

The Preheater drive system is hydraulic. The components are assembled and welded onto a frame rigid, strong main.

Heating System

The Preheater’s patented heating technology combines high-velocity forced hot air with low-level infrared heat. The system incorporates a diesel fuel burner, combustion air turbo blower, recirculating hot-air blower and a stainless-steel heating plenum. The burner heats a large amount of air in the heat-insulated, stainless steel combustion chamber. The hot air is then forced into the heating tubes located in the insulated heating plenum. On the bottom of the heating tubes there are thousands of small holes through which the high-velocity hot air is blown onto the road surface. Since most of the oxygen from the fresh air is used for combustion, the hot air used for heating has low oxygen content, thus avoiding oxidation of asphalt binder.

Excess hot air is then vacuumed by the recirculating hot-air blower and blown back into the combustion chamber to be reheated. About 10% of the air is exhausted to make room for fresh air needed for combustion, which is supplied by the combustion air turbo blower. Four lifting and two tilting cylinders are used to adjust the heating plenum.

A fully computerized flame-management system, combined with an advanced fuel-control system, ensures the reliability of the combustion-chamber flame for safe and continuous operation. The operator can monitor and control the temperature of hot air from the operating station.

The combination of economic diesel fuel with the hot-air heating system provides a major advantage over other hot in-place recycling equipment: the AR2000 offers significant cost savings, a safer environment for operators, and conservation of energy and natural resources. Under normal operating conditions, the system is virtually emission-free.

Drives and Axles

A hydraulic motor located on the rear axle drives the self-propelled Preheater. A 130 kW CAT engine drives the hydraulic variable displacement pump via a pump drive. Using hydraulics, the drive mode can be easily switched between operation and travel mode.
Both the front and rear axles are equipped with hydraulic steering cylinders and can be steered independently to reduce the turning radius.

The brake system on the front axle is operated pneumatically, and an additional parking brake is incorporated into the system for ease of operation. All tires are resistant to high heat. The front tires are changed to pneumatic tires during towing.

Operating Station


A dedicated operating station is located at the rear of the machine. Instrumentation controls are clearly displayed and easily accessible to the operator. A swivelling chair provides excellent visibility.

Electrical System

Electrical power supply is 24VDC. Electrical control and operation is designed for 24VDC. An onboard alternator charges heavy-duty batteries.

Transportation

Each AR2000 machine can be easily hitched to a tractor truck and transported at highway speeds between job sites.
The AR2000 Preheater is designed to heat and soften asphalt pavement. The patented heating system provides effective heat penetration, which prepares the pavement for further treatment.

The Preheater drive system is hydraulic. The components are assembled and welded onto a frame rigid, strong main.



Keywords: Combustion Air, combustion chamber, Diesel Fuel, Drive System, Heating, Heating System, Heating Technology, Heating Tubes, Hydraulics, Stainless Steel,

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