Linnhoff

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Understanding today's pressing environmental issues and rapidly increasing pollution problem, LINNHOFF as a member of the world population is committed to protect and conserve our last natural resources. We strive to balance between development and environmental protection by being innovative in the design of our system.

With good experiences gained from Germany, (we learned that) a total hot recycling system must be able to combine Pollutants Reduction , Energy Conservation , Temperature Control and material treatment ; ultimately achieving the highest level of waste recycling but not compromising on the mix quality.

ADVANTAGES

1.Pollutants Reduction:
The proper control of the temperature and recirculation of hot air minimizes the production of harmful fumes from the heating of asphalt.

The majority of the harmful substances recirculated are being expended at the hot air generator's flame zone thus giving us a cleaner exhaust. Asphalt fumes not circulated are being captured by fines injected at the Fumes Arrester before going into the baghouse.

2.Temperature Control

Full automatic control by the computer on the air flow through the control of the dampers and the temperature monitoring by the thermometer at various positions , bringing the RAP to the ideal temperature at reduced oxidation for the mixing with the virgin material.

3. Energy Conservation

The burner uses high pressure to atomize the fuel out of the nozzle. All the air required for the combustion is supplied by an incorporated radial/axial flow fan coupled with a regulator plate regulating the fuel feed valve to ensure exact air - oil proportioning ; thus , ensuring fully combusted flame to be developed in the burner head . The fuel wastage is minimised giving the owner a significant saving over a year operation.

The flame entering the hot air generator is further mixed with the returned air to give the air a final temperature of approximately 600° C for optimum heat transfer to the RAP.The special construction of the system ensures the optimum temperature of 140-150° C for the RAP before discharging into a buffer silo.By this method of recirculating the hot air , approximately 25% of energy is saved.

4. Material Treatment
In the treatment of RAP it is always important to prevent excessive fines or asphalt dust being produced, reason being:

›	The heated asphalt dust will normally choked up the pollution control system by coating onto the filter socks
›	The plant circulation system and drum may be progressively coated with the asphalt thus requiring constant cleaning
›	If too much hot air is in contact with the asphalt, there is a possibility of change in the properties of the RAP, such as oxidation, due to increased surface area

Model	HRC60	HRC80	HRC100	HRC120
Capacity	60 TPH	80 TPH	100 TPH	120 TPH

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