Hopper dryer

Details Hopper dryer Hopper dryer

1989-12-13

1991-07-23

Bennett, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Gravity flow type

34174, 34175, F26B 1712

Patent

active

050332082

ABSTRACT:
A hopper dryer for drying pelletized or granular resin material comprising a heat source at its center and double concentric cylinders which comprises an inner and an outer cylinder with many apertures to permit passing of heated gas respectively so as to form a doughnut-like material storing space therebetween. The gas is fed into the heat source to be heated, then passes through the apertures of the inner cylinder and discharged through the apertures of the outer cylinder so that the pelletized or granular resin material stored in the doughnut-like space formed between the inner and outer cylinder are preheated and dried.

REFERENCES:
patent: 3848344 (1974-11-01), Kemmetmueller
patent: 4004351 (1977-01-01), Sanneman et al.
patent: 4120644 (1978-10-01), Numasaki et al.
patent: 4289481 (1981-09-01), Yano
patent: 4337584 (1982-07-01), Johnson
patent: 4531308 (1985-07-01), Neilson et al.
patent: 4914834 (1990-04-01), Sime

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