A hybrid power plant system including a gas turbine system and a coal fired boiler system inputs high oxygen content gas turbine flue gas into the coal fired boiler system, said gas turbine flue gas also including carbon dioxide that is desired to be captured rather than released to the atmosphere. Oxygen in the gas turbine flue gas is consumed in the coal fired boiler, resulting in relatively low oxygen content boiler flue gas stream to be processed. Carbon dioxide, originally included in the gas turbine flue gas, is subsequently captured by the post combustion capture apparatus of the coal fired boiler system, along with carbon diode generated by the burning of coal. The supply of gas turbine flue gas which is input into the boiler system is controlled using dampers and/or fans by a controller based on an oxygen sensor measurement and one or more flow rate measurements.

A cooking apparatus can include an enclosure defining a heating chamber configured to be heated and used for cooking food, a burn box proximate to the enclosure and which is configured to provide heat to the heating chamber, a hopper fluidly coupled to the burn box and configured to hold fuel, and a fuel conditioner disposed between the hopper and the burner to condition the fuel prior to burning in the burner. The fuel conditioner can be, for example, a wood chipper configured to reduce the size of the fuel.

A hybrid power plant system including a gas turbine system and a coal fired boiler system inputs high oxygen content gas turbine flue gas into the coal fired boiler system, said gas turbine flue gas also including carbon dioxide that is desired to be captured rather than released to the atmosphere. Oxygen in the gas turbine flue gas is consumed in the coal fired boiler, resulting in relatively low oxygen content boiler flue gas stream to be processed. Carbon dioxide, originally included in the gas turbine flue gas, is subsequently captured by the post combustion capture apparatus of the coal fired boiler system, along with carbon diode generated by the burning of coal. The supply of gas turbine flue gas which is input into the boiler system is controlled using dampers and/or fans by a controller based on an oxygen sensor measurement and one or more flow rate measurements.

A method of firing a biofuel is provided. The method includes: introducing the biofuel into a combustion chamber having a first stage and a second stage; combusting the biofuel in a suspended state while flowing from the first stage to the second stage; and introducing a first air stream and a second air stream into the combustion chamber at the first stage and at the second stage, respectively, to facilitate combustion of the biofuel.

A classifier including a housing to take in air flow from below into a radially outer region of an inside space; a flow deflection portion to deflect the air flow toward a center axis of the housing; and an annular rotational portion disposed rotatably in a radially inner region positioned on a radially inner side of the radially outer region, of the inside space of the housing, and configured to classify particles which accompany the air flow. The annular rotational portion includes a plurality of rotational blades arranged at intervals around a rotational axis of the annular rotational portion. The plurality of rotational blades form an outer shape of the annular rotational portion forms an angle of not greater than 75 with a segment extended in a horizontal direction from the annular rotational portion outward in a radial direction, in a side view of the annular rotational portion.

A method for preheating a beater mill is provided. The method includes: rotating a beater wheel disposed within the beater mill to facilitate circulation of a gas stream between the beater mill and a furnace fluidly connected to each other via both a pulverized fuel conduit and a flue gas recirculation conduit; generating a burner gas via a burner disposed within the flue gas recirculation conduit such that the burner gas joins and heats the gas stream circulating through the beater mill and the furnace; and adjusting at least one of an air supply and a fuel supply to the burner via a controller based at least in part on one of a temperature of the gas stream at an entrance of the beater mill, a temperature of the gas stream at an exit of the beater mill, and an oxygen level within the beater mill.

The invention produces a mechanism and method to clean coal of contaminates/pollutants such as sulfur, mercury, silica, and others, for use in a coal fired electrical generator. The mined coal is first ground to a mesh size and is subjected to a vertical separator which separates contaminates/pollutants from the coal. The now cleaned coal is ground to a smaller mesh size and injected into the boiler of the electrical generator. In some embodiments, the cleaned coal is formed into solids for transport to the coal fired electrical generator.

An abnormality determination device determines whether or not there is an abnormality in a pulverizer that pulverizes solid fuel and supplies the solid fuel to a boiler of a thermal power plant. The abnormality determination device includes a data acquisition unit configured to acquire operation data indicating an operation state of the pulverizer, and an abnormality determination unit configured to determine whether or not there is an abnormality in the pulverizer based on whether or not the acquired operation data falls within a predetermined range.