Preheating screw

Details Preheating screw Preheating screw

1995-04-12

1996-08-20

Jenkins, Robert W.

Agitating

With heating or cooling

Electrical heating

366147, 165 87, 219523, B01F 1506

Patent

active

055472770

ABSTRACT:
A preheating screw for the simultaneous mixing and heating of fine-grained or paste-like substances, in which intensive heat transfer takes place during transport of the substance by use of a rotating hollow screw that is filled with a heat-transfer medium, preferably a fluid, heat being transfered from the heat-transfer medium to the product by way of the heated hollow screw. An electrical heating device is installed in a hollow screw shaft, and is supplied with electrical energy via sliding contacts positioned on the outside of the screw shaft.

REFERENCES:
patent: 2722716 (1955-11-01), Henning
patent: 3529661 (1970-09-01), Yousch
patent: 3563710 (1971-02-01), Dew
patent: 3800865 (1974-04-01), Onarheim
patent: 3845940 (1974-11-01), Lodige
Brochure: Hollow-Screw Heat Exchangers (Hohlschnecken Warmetauscher No. 1571 d/3.88) of the firm of Lurgi, Frankfurt am Main, Germany Date Mar. 1988.

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