Back to results
US 2007/0169837 A1Published application
Ramp rate blender
AssigneeAir Products and Chemicals, Inc.
InventorsJoseph Cohen, Edward Heydorn
Life of this patent
Estimating the term…
Abstract
The invention provides processes for delivering a blend of two or more compressed gas streams to a receiving vessel at a preset ramp rate under pressure regulation control.
Claims20
A process for delivering a blend of two or more compressed gas streams to a receiving vessel, the process comprising:
- (a) blending two or more compressed gas streams to form the blend, wherein each of the two or more compressed gas streams (1) is supplied by a separate compressed gas supply source, (2) is under the control of one or more pressure regulators, and (3) is subject to mass flow rate measurement by one or more flow detectors;
- and
- (b) delivering the blend to the receiving vessel at a preset blend ramp rate, wherein
- (I) a programmable controller (1) receives data from the one or more flow detectors representing the mass flow rates for at least two of the two or more compressed gas streams (2) calculates a cumulative mass ratio for the blend based on the mass flow rates of at least two of the two or more compressed gas streams, and (3) (i) compares the calculated cumulative mass ratio for the blend to a pre-set blend cumulative mass ratio, and (ii) adjusts the pressure regulator for at least one of the two or more compressed gas streams as necessary to maintain the calculated cumulative mass ratio for the blend within a specified tolerance of the pre-set blend cumulative mass ratio;
- and (II) at least two of the two or more compressed gas streams have different compositions.
2 more elements
A process for delivering a blend of two or more compressed gases to a receiving vessel, the process comprising:
- (a) blending two or more compressed gas streams to form the blend, wherein each of the two or more compressed gas streams (1) is supplied by a separate compressed gas supply source, (2) is under the control of one or more pressure regulators, (3) is subject to temperature measurement by one or more temperature sensors, (4) has essentially the same composition;
- and
- (b) delivering the blend to the receiving vessel at a preset blend ramp rate, wherein
- a programmable controller (1) receives data from the one or more temperature sensors representing the temperatures of at least two of the two or more compressed gas streams (2) calculates an instantaneous ramp rate for at least one of the compressed gas streams based on the temperatures of at least two of the two or more compressed gas streams, and (3) (i) compares an instantaneous measured temperature of the blend to a pre-set target temperature of the blend, and (ii) adjusts the pressure regulator for at least one of the two or more compressed gas streams as necessary to maintain the instantaneous measured temperature within a specified tolerance.
1 more element
Dependencies are inferred from the claim text.