Improved method for injecting treatment chemicals using a consta

Details Improved method for injecting treatment chemicals using a consta Improved method for injecting treatment chemicals using a consta

1991-05-08

1993-03-23

Bertsch, Richard A.

Pumps

Expansible chamber type

Plural pumping chambers

F04B 2304

Patent

active

051958791

ABSTRACT:
A method for providing a continuous injection of a constant amount of a desired treatment chemical into a flowing stream is described. This method insures that the concentration of the desired treatment chemical is maintained at a relatively uniform concentration throughout the flowing stream. A constant flow pumping apparatus for providing the continuous injection of the treatment chemical is also described. The pumping apparatus includes multiple positive displacement pumps which are driven by a cam that such that the rates of displacement of the displaceable members of the positive displacement pumps is a constant positive value. This insures that the pumping apparatus provides a constant flow of the treatment chemical being injected into a flowing stream. Providing a uniform concentration of a treatment chemical in a flowing stream maximizes the benefit of the treatment chemical. Conventional positive displacement pumps for injecting treatment chemicals provide intermittent injection of the treatment chemical such that sections of the flowing process stream have no concentration of the treatment chemical. This reduces the benefit of the treatment chemical and may prevent it from providing any benefit at all.

REFERENCES:
patent: 2605711 (1952-08-01), Audemar
patent: 2697403 (1954-12-01), Benedek
patent: 3323461 (1967-06-01), Bennett
patent: 3816029 (1974-06-01), Bowen et al.
patent: 4192223 (1980-03-01), Lombard
patent: 4453898 (1984-06-01), Leka et al.
patent: 5066199 (1991-11-01), Reese et al.

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