Claims
- 1. An apparatus for the continuous dry, nonpressurized reclaiming of a material selected from the group which consists of salvaged rubber, plastics and mixtures thereof, said apparatus comprising:
- a vertical microwave heating channel formed at opposite ends with means for preventing escape of microwaves from said channel and, intermediate said means, a brush-discharge electrode for generating microwaves in said channel to heat said material as it transverses said channel;
- means forming an inlet at an upper end of said channel for feeding said material in comminuted form to said channel;
- a curved guide element connected to a lower end of said channel for transferring the microwave-heated comminuted material from said channel to a charging trough with minimal relative change in positions of particles of said material; and
- a hollow-flight screw heat exchanger positioned to receive the microwave-heated comminuted material from said trough and comprising a casing and a fluid-heated hollow-flight screw rotatable in said casing to heat said material to a reclaiming temperature.
- 2. The apparatus defined in claim 1 said screw is a single hollow-flight screw and said casing is a cylindrical casing receiving said screw.
- 3. The apparatus defined in claim 2 wherein the flight of said screw is of rectangular cross section.
- 4. The apparatus defined in claim 3 wherein said flight is of square cross section.
- 5. The apparatus defined in claim 1 wherein said channel is of rectangular cross section.
- 6. The apparatus defined in claim 5 wherein said channel is of square cross section.
- 7. The apparatus defined in claim 5 wherein the flight of said screw is is square cross section and the cross sections of said flight and said channel have similar dimensions.
- 8. The apparatus defined in claim 1, further comprising a coating on the flight of said screw composed of a cross-linked fluoridated and fully halogenated polyolefin polymer containing a strength-increasing additive.
- 9. The apparatus defined in claim 8, further comprising a coating on the interior of said casing composed of a cross-linked fluoridated and fully halogenated polyolefin polymer containing a strength-increasing additive.
- 10. The apparatus defined in claim 1, further comprising a coating on the interior of said casing composed of a cross-linked fluoridated and fully halogenated polyolefin polymer containing a strength-increasing additive.
- 11. The apparatus defined in claim 1, further comprising an unheated intermediate channel between said microwave heating channel and said curved element.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3408493 |
Mar 1984 |
DEX |
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Parent Case Info
This is a divisional of co-pending application Ser. No. 709,038, filed on Mar. 7, 1985, now U.S. Pat. No. 4,665,101.
US Referenced Citations (3)
Foreign Referenced Citations (5)
Number |
Date |
Country |
667968 |
Nov 1938 |
DE2 |
3242609 |
Jun 1983 |
DEX |
3408493 |
Apr 1986 |
DEX |
919385 |
Mar 1947 |
FRX |
245370 |
Jul 1947 |
CHX |
Divisions (1)
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Number |
Date |
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Parent |
709038 |
Mar 1985 |
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