Turbocharger systems and method for capturing a process gas

A method for a turbocharger system for use with a mining process gas capture system, the method comprising:

• adjusting, via electronic signals received from a controller, one or more turbine bypass valves and a choke valve of the turbocharger system based on electronic feedback signals received by the controller from pressure and mass flow sensors and further based on each of a desired mass flow rate and a desired pressure of a process gas output by the turbocharger system to the mining process gas capture system, the turbocharger system including a low pressure turbocharger including a low pressure turbine configured to drive a low pressure compressor, a mid-pressure turbocharger including a mid-pressure turbine configured to drive a mid-pressure compressor, the mid-pressure compressor fluidly coupled downstream of the low pressure compressor, and a high pressure turbocharger including a high pressure turbine configured to drive a high pressure compressor, the high pressure compressor fluidly coupled downstream of the mid-pressure compressor, the one or more turbine bypass valves coupled across one or more of the low pressure turbine, the mid-pressure turbine, and the high pressure turbine, and the choke valve positioned downstream of an outlet of the high pressure compressor and upstream of a first inlet of a heat exchanger that is positioned to receive hot inlet gases from a gas generating system via a second inlet and discharge cooler inlet gases to the low pressure compressor, where the desired mass flow rate is a desired mass flow rate of gas entering and flowing through the low pressure compressor.

A system for use with a mining carbon dioxide capture system, the system comprising:

• a heat exchanger positioned to receive hot inlet gas from a gas generating system via a first inlet;
• a low pressure turbocharger including a low pressure compressor and a low pressure turbine, the low pressure compressor fluidly coupled to a first outlet of the heat exchanger;
• a mid-pressure turbocharger including a mid-pressure compressor and a mid-pressure turbine, the mid-pressure compressor fluidly coupled in series with the low pressure compressor;
• a high pressure turbocharger including a high pressure compressor and a high pressure turbine, the high pressure compressor fluidly coupled in series with the mid-pressure compressor and fluidly coupled to a second inlet of the heat exchanger;
• at least one turbine bypass valve coupled across at least one of the low pressure turbine, the mid-pressure turbine, and the high pressure turbine;
• a choke valve coupled between an outlet of the high pressure compressor and the second inlet of the heat exchanger;
• and
• a controller including instructions stored on memory, that when executed during operation of the system, cause the controller to:
• adjust the choke valve and the at least one turbine bypass valve based on a desired mass flow rate of a process gas at an inlet to the system and a desired pressure of the process gas output by the high pressure compressor to the mining carbon dioxide capture system.