Hybrid pumper
AssigneeAir Products and Chemicals, Inc.
InventorsJohn Charles Street, Paul Martin Davis
Life of this patent
Estimating the term…
Abstract
A process and apparatus that includes a cryogenic source for providing a cryogenic fluid for vaporization, a cryogenic pump in fluid flow communication with the cryogenic source for increasing the pressure of the cryogenic fluid, an unfired vaporizer coolant circuit 110 in fluid flow communication with the cryogenic pump and adapted to accept the cryogenic fluid to form a heated stream, a direct-fired vaporizer downstream and in fluid flow communication with the unfired vaporizer coolant circuit 110 and adapted to accept the heated stream from the unfired vaporizer coolant circuit to form a superheated stream; and a diesel engine power unit 118 to provide power to the cryogenic pump, the unfired vaporizer coolant circuit 110, and the direct-fired vaporizer.
Claims22
A pumper, comprising:
- a. a cryogenic source for providing a cryogenic fluid for vaporization;
- b. a cryogenic pump in fluid flow communication with the cryogenic source for increasing the pressure of the cryogenic fluid;
- c. an unfired vaporizer coolant circuit in fluid flow communication with the cryogenic pump and adapted to accept the cryogenic fluid and discharge the cryogenic fluid as a heated stream;
- d. a direct-fired vaporizer downstream and in fluid flow communication with the unfired vaporizer coolant circuit and adapted to accept the heated stream from the unfired vaporizer coolant circuit to form a superheated stream;
- e. a heat exchanger adapted to accept an exhaust gas stream from the direct-fired vaporizer and a coolant from the unfired vaporizer coolant circuit, wherein the exhaust gas stream from the direct-fired vaporizer is heat exchanged with the coolant;
- f. a diesel engine power unit to provide power to the cryogenic pump, the unfired vaporizer coolant circuit, and the direct-fired vaporizer;
- g. a first bypass circuit in fluid flow communication with the cryogenic pump and the superheated stream, thereby enabling a portion of the cryogenic fluid to be mixed with the superheated stream and to bypass the unfired vaporizer coolant circuit and the direct-fired vaporizer;
- h. a second bypass circuit in fluid flow communication with the cryogenic PUMP and the heated stream, thereby enabling a portion of the cryogenic fluid to bypass the unfired vaporizer coolant circuit and flow through the direct-fired vaporizer;
- and
- i. a control system adapted to control flow of cryogenic fluid through the first and second bypass circuits.
A process for superheating a cryogenic fluid, comprising:
- a. providing a cryogenic fluid for vaporization;
- b. pressurizing the cryogenic fluid;
- c. warming the pressurized cryogenic fluid in an unfired vaporizer coolant circuit to form a warm pressurized fluid;
- d. further warming the warmed pressurized fluid in a direct-fired vaporizer positioned downstream and in fluid flow communication with the unfired vaporizer coolant circuit to form a superheated stream;
- e. heat exchanging an exhaust gas stream from the direct-fired vaporizer and a coolant from the unfired vaporizer coolant circuit to warm the coolant;
- f. selectively enabling at least a first portion of the cryogenic fluid to flow through a first bypass circuit in fluid flow communication with the cryogenic pump and the superheated stream, thereby enabling a portion of the cryogenic fluid to be mixed with the superheated stream and to bypass the unfired vaporizer coolant circuit and the direct-fired vaporizer;
- g. selectively enabling at least a second portion of the cryogenic fluid to flow through a second bypass circuit in fluid flow communication with the cryogenic pump and the heated stream, thereby enabling a portion of the cryogenic fluid to bypass the unfired vaporizer coolant circuit and flow through the direct-fired vaporizer;
- and
- h. controlling flow of the cryogenic fluid through the first and second bypass circuits.
Dependencies are inferred from the claim text.