HP-DMH(H) Series High Efficient Dry Material Preheater

Mixing blades in preheater are tangent, and they have the same mixing radius but rotate at different speed. Mixing blades are designed with hollow channel for heat transfer oil flowing inside, they can heat up dry materials while mixing, which makes materials contact heat transfer surface of the tank directly, and in this way, it realizes high efficiency heating.

Adopt new type extended tank high efficiency heating technology，high efficient high temperature tank patent technology , new type of mixing blade patent technology , overall heating patent technology , mixing blade heating patent technology, discharge gate heating technology, lining plate and tank seamless connection technology.

Adopt integral heating mixing blade. Vanes and hollow shaft of mixing blades and other parts in contact with materials are heated by heat transfer oil, and materials are fully heated in various directions.

Use special equipment to process inner diameter of the tank and bearing hole of end plate. The equipment has high machining precision, which can ensure the requirement of clearance between mixing blades and lining plates of tank and prevent particle materials from being grinded.

Adopt new temperature measuring technology, which improves thermal response and anti-interference performance during temperature measurement.

Adopt double metal ring seals, which form multiple sealing. No carbon powder is leaked from shaft end of mixing blades.

Adopt hydraulic rotary device to lock bottom discharge gate, which guarantees good sealing performance. Sealing surface never wears out and sealing performance is reliable. No material is leaked from discharge gate.

Mixing blades pushes materials spirally and discharging speed is fast. Discharge gate is located at the bottom of tank, material is discharged completely and discharge time is less than 2 minutes, no material left in the tank.

Sealing hopper seals discharge gate completely, no powder is leaked during material discharge.

Hydraulic executing mechanism of discharge gate is out of sealing hopper, inspection and maintenance are convenient.

Wear-resistant layer is welded on the surface of mixing blades, the rigidity of wear-resistant layer is up to HRC 60-65. Service life of mixing blades is 20 years.

Use new type of wear-resistant manganese steel lining plates with high strength after thermal treatment to replace imported products. Service life of lining plates for anode production is 15 years.Service life of lining plates for cathode and carbon electrode paste production is 1 year.

For production of carbon products which are very abrasive, use convenient replacement structure of lining plates so that lining plates can be replaced without disassembling the whole equipment.

Mixing blade bearing is movable designed to avoid bearing blockage caused by mixing blade stretching longer under high temperature.

Bearing chamber has cooling water jacket which ensures normal working temperature of bearing under high temperature and prolongs service life.

Adopt convenient disassembly structure of bearing seat. In the maintenance and replacement of main shaft bearing of mixing blade, it is not necessary to remove end plate of the tank, but merely to remove fixing bolts of bearing seat to take bearing seat out.

Preheater tank adopts split structure, therefore, it is not necessary to disassemble the tank, but only to remove the upper part of tank end plate for maintenance of mixing blades.

The transmission system is composed of main motor and P series hard-teeth reduction gear, bearing capacity of which is 3 times that of common reduction gear, which ensures high bearing capacity of the transmission system. It will not cause damage to the equipment even under the condition when hard objects accidentally falling into.

Special equipment is used for machining to guarantee perfect concentricity, operation is smooth and service life is long. Operating noise of the entire machine is less than 80dB.