Heat exchanger

Claim 2

A heat exchanger for treating moist, tacky material, which comprises: a. a stationary drum, having b. an internal hollow shaft or rotor with inlet and outlet for the heat exchanging medium, c. annular bodies in the shape of ribs encircling said rotor, each of said ribs being provided with a helical, hollow space, the inner end of which communicates with the hollow shaft, the outer end being closed, each said rib formed from a plane sheet, and the helical hollow space thereof being formed by attachment to the sheet of a helically cut strip of arcuate cross-section, and means for rotating said hollow shaft and the shaft attached annular rib shaped bodies in a direction such that the closed end of the helical space is in front whereby movement of the condensate back to the hollow space of the rotor is aided by the rotor movement.

Claim 3

Heat exchanger according to claim 1, in which a helical strip of curved cross-section is mounted on each side of the plane sheet, from which the rib is made, to form two helical hollow spaces in the rib.

Claim 4

Heat exchanger according to claim 2, in which the outer ends of the helical hollow spaces overlap one another and are mutually connected through an opening in the rib sheet.

Claim 5

Heat exchanger according to claim 1, in which a helical bulb is embossed or calandered in the sheet, from which the rib is made, said bulb being covered by a helically cut, and also embossed strip to form the helical hollow space.

Claim 6

Heat exchanger according to claim 1 including a radially extendinG return passage, one end of said return passage connected to the outer end of the helical hollow space and the other end connected to the hollow space of the rotor.

Claim 7

A heat exchanger for treating moist, tacky material, which comprises: a. a stationary drum, having b. an internal hollow shaft or rotor with inlet and outlet for the heat exchanging medium, c. annular bodies in the shape of ribs encircling said rotor, each of said ribs being provided with a helical, hollow space, the inner end of which communicates with the hollow shaft, the outer end being closed, means for rotating said hollow shaft and the shaft attached annular rib shaped bodies, and a guide plate fitted into the helical hollow space of the rib, and said guide plate terminating shortly before the closed end of said hollow space.

Claim 8

A heat exchanger for treating moist, tacky material, which comprises: a. a stationary drum, having b. an internal hollow shaft or rotor with inlet and outlet for the heat exchanging medium, c. annular bodies in the shape of ribs encircling said rotor, each of said ribs being provided with a helical, hollow space, the inner end of which communicates with the hollow shaft, the outer end being closed, means for rotating said hollow shaft and the shaft attached annular rib shaped bodies, and a guide plate fitted into the helical hollow space of the rib, and said guide plate terminating shortly before the closed end of said hollow space.

Claim 9

A heat exchanger for treating moist, tacky material, which comprises a. a stationary drum, having b. an internal hollow shaft or rotor with inlet and outlet for the heat exchanging medium, c. annular bodies in the shape of ribs encircling said rotor, each of said ribs being provided with a helical, hollow space, the inner end of which communicates with the hollow shaft, the outer end being closed, and means for rotating said hollow shaft and the shaft attached annular rib shaped bodies, said annular bodies being further characterized in that the distance between the turns of the helical hollow space is adjusted so that helically cut strips of width substantially corresponding to the distance between the turns of said strips can be used for forming the hollow space in a direction such that the closed end of the helical space is in front whereby movement of the condensate back to the hollow space of the rotor is aided by the rotor movement.

Claim 10

A heat exchanger for treating moist, tacky material, which comprises a. a stationary drum, having b. an internal hollow shaft or rotor with inlet and outlet for the heat exchanging medium, c. annular bodies in the shape of ribs encircling said rotor, each of said ribs being provided with a helical, hollow space, the inner end of which communicates with the hollow shaft, the outer end being closed, and means for rotating said hollow shaft and the shaft attached annular rib shaped bodies, said annular bodies being further characterized in that the distance between the turns of the helical hollow space is adjusted so that helically cut strips of width substantially corresponding to the distance between the turns of said strips can be used for forming the hollow space in a direction such that the closed end of the helical space is in front whereby movement of the condensate back to the hollow space of the rotor is aided by the rotor movement.