Rotary steam dryer control

Details Rotary steam dryer control Rotary steam dryer control

1979-02-26

1981-12-01

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34134, 34138, 165 88, F26B 2310

Patent

active

043028888

ABSTRACT:
The disclosure relates to a product moisture control system for use in a product steam dryer of the type which removes moisture from wet product material, wherein the wet product material is contacted with steam tubes for heating the material and evaporating the moisture therein. The control system includes a first control loop which senses the moisture content of the dried material and establishes at predetermined times corrections to the steam pressure within the steam tubes to provide processed material having a desired moisture content. The system also includes a second control loop which continuously detects the steam pressure and maintains the steam pressure substantially constant during the time intervals between the predetermined steam pressure correction times.

REFERENCES:
patent: 2823465 (1958-02-01), Armstrong
patent: 3658642 (1972-04-01), Keyes et al.
patent: 3760816 (1973-09-01), Wochnowski
patent: 3778707 (1973-11-01), Vogel
patent: 3848342 (1974-11-01), Bartles et al.
patent: 4161962 (1979-07-01), Maringer et al.

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