Boots – shoes – and leggings
Patent
1976-02-18
1977-10-11
Ruggiero, Joseph F.
Boots, shoes, and leggings
23230A, 364105, G06F 1546, G05D 1108
Patent
active
040537439
ABSTRACT:
In a chemical reactor or analogous apparatus, a tank or similar system, pH and other concentration variables are controlled by a method wherein -- when at least one desired outlet concentration or a function dependent on outlet concentrations is given -- initially, the apparent output concentration of at least one feed component is calculated with the aid of the inlet concentration and the residence-time distributioned either the requisite feed concentration or flow of each control component with the aid of a control algorithm based on the residence-time distribution of said control component between its feed point and the outlet point of the reactor, or the control of each actuating variable that substantially affects a physical control, with the aid of an appropriate control algorithm; whereby other corresponding mathematical representations, e.g., time-variable and approximative representations are also considered as the said residence-time distributions, and the said residence-time distributions can also be equal and/or all but at least one of them can be replaced with a constant or flow-dependent time delay, or may even be overlooked; and finally, the corresponding control steps are effected. Said equilibrium dependences, from which the requisite apparent output concentration of each component is calculated, may preferably comprise a group of material balances and equilibrium equations, experimentally determined curves, or numerically expressed experimental dependences.
REFERENCES:
patent: 3473008 (1969-10-01), Bay et al.
patent: 3497449 (1970-02-01), Urban
patent: 3600567 (1971-08-01), Varnela
patent: 3614682 (1971-10-01), Smith
patent: 3728526 (1973-04-01), Youngblood
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