Methanol injection system and method to prevent freezing of...

Details Methanol injection system and method to prevent freezing of... Methanol injection system and method to prevent freezing of...

2006-01-03

2006-01-03

Thorpe, Timothy S. (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Having ambient condition responsive means

C417S046000, C137S013000, C137S059000

Reexamination Certificate

active

06981848

ABSTRACT:
A system for injecting an injection fluid into a pipeline includes an injection pump, a timer for initiating sequencing of the pump, a control valve for controlling the flow of pressurized fluid to power the injection pump, a controller for controlling operation of the control valve, and an electric motor responsive to the controller for rotating a cam on the motor shaft to open and close the control valve. The injected fluid may be methanol, so that the system automatically injects methanol into a pipeline which transmits natural gas. In one embodiment, the system includes a temperature sensor and a flow sensor for inputting signals to the controller.

REFERENCES:
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patent: 3381699 (1968-05-01), Coffman
patent: 3989574 (1976-11-01), Evans
patent: 4007755 (1977-02-01), Lerner et al.
patent: 4525127 (1985-06-01), Welker
patent: 4631967 (1986-12-01), Welker
patent: 5388905 (1995-02-01), Ake et al.
patent: 2618210 (1987-07-01), None
patent: 55-102018 (1980-08-01), None
2 home pages of Welker Engineering downloaded from the World Wide Web on Apr. 28, 1999.

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