Control for maximizing capacity and optimizing product cost of d

Details Control for maximizing capacity and optimizing product cost of d Control for maximizing capacity and optimizing product cost of d

1975-05-14

1977-06-21

Yudkoff, Norman

Distillation: processes, separatory

With measuring, testing or inspecting

Of temperature or pressure

202160, 196132, B01D 342

Patent

active

040309860

ABSTRACT:
A method and apparatus for controlling the operation of a distillation column which utilizes cost factors to achieve the best economical production of a product within acceptable purity limits while maintaining the column at maximum operating capacity. The control is based on a series of priorities in which each of the following control signals is selectively used in turn to modify the control the heat-input to the column; cost factors applying to the column, cost factors applying to the several columns in the system, the purity of the product, the operating pressure limit of the column and, for lighter products, the rate of fluid velocity through the column. For heavier products, the rate of fluid velocity through the column is used independently of the heat-input control to restrict the flow of overhead product to the condenser to increase the back pressure on the column.

REFERENCES:
patent: 2882693 (1959-04-01), Clay
patent: 3268420 (1966-08-01), Webber et al.
patent: 3342701 (1967-09-01), Rijnsdorp

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