METHOD AND SYSTEM TO CONTROL THE METHANE MASS FLOW RATE FOR THE PRODUCTION OF LIQUEFIED METHANE GAS (LMG)

摘要

The system is provided for generating a mixed methane gas feed stream using at least one source of biogas and an alternate source of methane gas. The system includes a biogas subsystem, a control device for the methane gas from the at least one alternate source of methane gas, and a vertically-extending gas mixing vessel. A method of controlling a methane gas mass flow rate of a mixed methane gas feed stream is also disclosed. The proposed concept is particularly well adapted for situations where an uninterrupted and relatively constant input of methane gas is required to ensure an optimum operation of, for instance, a LMG production plant.

主权项

1. A gas supply system for generating a mixed methane gas feed stream using at least one source of biogas and at least one alternate source of methane gas, the gas supply system including:
a biogas subsystem; a control device for the methane gas coming from the at least one alternate source of methane gas; and a vertically-extending gas mixing vessel having an upper biogas inlet that is selectively in fluid communication with an outlet of the biogas subsystem, at least two vertically spaced-apart mid-level gas inlets that are each selectively in fluid communication with the control device for the methane gas coming from the at least one alternate source of methane gas, a bottom condensate outlet, and a mixed methane gas feed stream outlet that is located vertically above the mid-level gas inlets.