A modular combustion system for flexible energy generation is provided. The system comprises a plurality of combustion boilers, at least one oxidizer supply unit providing an oxidizer stream to the combustion boilers, at least one feeder to provide fuel to the combustion boilers, at least one particle removal unit to remove particles from a flue gas output stream from the combustion boilers, and a pollution removal unit to remove pollutant gases from the flue gas output stream. A process for flexible energy generation using the modular combustion system is disclosed that includes providing an oxidizer stream to a plurality of combustion boilers with at least one oxidizer supply unit, providing fuel to the plurality of combustion boilers with at least one feeder, removing particles from a flue gas output stream from the plurality of combustion boilers with at least one particle removal unit, and removing pollutant gases from a particle-free flue gas output stream with at least one pollution removal unit. A system for controlling wall heat flux in a pressurized coal combustion environment is disclosed that includes at least one burner; and at least one low-mixing, axial-flow boiler.

An oxy-combustor is provided which comprises a combustion vessel including at least one solid fuel slurry inlet port, at least one oxygen inlet port and at least one supercritical fluid inlet port, wherein the combustion vessel is operable at an operating pressure of at least 1,100 psi; an interior of the combustion vessel comprises a combustion chamber and a supercritical fluid infusion chamber surrounding at least a part of the combustion chamber, the supercritical fluid infusion chamber and the combustion chamber are separated by a porous liner surrounding the combustion chamber, and the supercritical infusion chamber is located between the porous liner and an outer casing of the combustion vessel.

A device for the flameless oxidation of fuel includes a flameless oxidation burner, a first conduit to convey a fluid fuel phase to a first outlet and a direct primary jet including the fluid fuel phase outwardly therefrom. A second conduit is provided to convey a jacketing gas to a second outlet. The second conduit is disposed surrounding the first conduit so as to direct a jacketing jet of the jacketing gas outwardly therefrom surrounding the primary jet.

A modular pressurized combustion system for flexible energy generation is provided. The system comprises a plurality of pressurized combustion boilers, at least one compressor configured to provide pressurized oxidizer gas to each of the plurality of pressurized combustion boilers in parallel, and at least one feeder configured to provide fuel to each of the plurality of pressurized combustion boilers in parallel. The system further comprises a flue gas input unit configured to provide recycled flue gas to each of the plurality of pressurized combustion boilers in series, at least one pressurized heat recovery unit configured to receive a flue gas output stream from each of the plurality of pressurized combustion boilers, and at least one particle filter configured to filter a flue gas output stream from the pressurized heat recovery unit. The system also comprises an integrated pollutant removal unit.

A burner including a first pulverized coal entrained fluid flow conduit; an inner hydrogen conduit; and a hydrogen oxidant conduit positioned between the first pulverized coal entrained fluid flow conduit and the inner hydrogen conduit; an outlet of the inner hydrogen conduit positioned a first distance from an outlet of the hydrogen oxidant conduit such that hydrogen output from the outlet of the inner hydrogen conduit passes through a portion of the hydrogen oxidant conduit to the outlet of the hydrogen oxidant conduit; and the outlet of the hydrogen oxidant conduit being a second distance from an outlet of the first pulverized coal entrained fluid flow conduit such that the hydrogen and the hydrogen oxidant output from the outlet of the hydrogen oxidant conduit passes through a portion of the first pulverized coal entrained fluid flow conduit for being output from the burner.

A burner including a first pulverized coal entrained fluid flow conduit; an inner hydrogen conduit; and a hydrogen oxidant conduit positioned between the first pulverized coal entrained fluid flow conduit and the inner hydrogen conduit; an outlet of the inner hydrogen conduit positioned a first distance from an outlet of the hydrogen oxidant conduit such that hydrogen output from the outlet of the inner hydrogen conduit passes through a portion of the hydrogen oxidant conduit to the outlet of the hydrogen oxidant conduit; and the outlet of the hydrogen oxidant conduit being a second distance from an outlet of the first pulverized coal entrained fluid flow conduit such that the hydrogen and the hydrogen oxidant output from the outlet of the hydrogen oxidant conduit passes through a portion of the first pulverized coal entrained fluid flow conduit for being output from the burner.