The present invention relates to burners and boiler structures of heating systems which work with solid fuel or which work especially with wood pellets, olive stones and other similar propellants. The burner has a C-shaped grate structure comprising a grate mount (4.2) for opening and closing an ash discharging mouth, and the top grate made up by the following components: Grate arms (4.1.2) that can move at a horizontal angle over connecting grate shafts (4.1.3) independent from each other; grate shims (4.1.4) located on the grate shafts (4.1.3) and between the grate arms (4.1.2); a shank (4.1.5) connecting the grate arms (4.1.2) to a grate frame (4.1.1), and the top grate to the grate mount (4.2), thus enabling the top grate to move in an upwards or downwards motion limited by supports (4.1.7, 4.1.8). Furthermore, the burner comprises uneven rails on which the top grate moves guided by guide pins (4.1.6).

The present invention relates to burners and boiler structures of heating systems which work with solid fuel or which work especially with wood pellets, olive stones and other similar propellants. The burner has a C-shaped grate structure comprising a grate mount (4.2) for opening and closing an ash discharging mouth, and the top grate made up by the following components: Grate arms (4.1.2) that can move at a horizontal angle over connecting grate shafts (4.1.3) independent from each other; grate shims (4.1.4) located on the grate shafts (4.1.3) and between the grate arms (4.1.2); a shank (4.1.5) connecting the grate arms (4.1.2) to a grate frame (4.1.1), and the top grate to the grate mount (4.2), thus enabling the top grate to move in an upwards or downwards motion limited by supports (4.1.7, 4.1.8). Furthermore, the burner comprises uneven rails on which the top grate moves guided by guide pins (4.1.6).

A grate block for a combustion grate including a block body having an upper wall which forms a bearing surface and along which the combustible material is to be conveyed and a front wall which has a lower bearing edge, the bearing edge being designed to come into contact with the bearing surface of an adjacent grate block in a feed direction, wherein the upper wall has an air supply opening formed by an air supply channel. The air supply opening is at least partially surrounded by a thickened portion which protrudes from the bearing surface, forms a protective channel extending the air supply channel, and is designed to prevent liquid from flowing into the air supply opening.

A grate block for a combustion grate including a block body having an upper wall which forms a bearing surface and along which the combustible material is to be conveyed and a front wall which has a lower bearing edge, the bearing edge being designed to come into contact with the bearing surface of an adjacent grate block in a feed direction, wherein the upper wall has an air supply opening formed by an air supply channel. The air supply opening is at least partially surrounded by a thickened portion which protrudes from the bearing surface, forms a protective channel extending the air supply channel, and is designed to prevent liquid from flowing into the air supply opening.

A grate block for a combustion grate including a block body having an upper wall which forms a bearing surface and along which the combustible material is to be conveyed and a front wall which has a lower bearing edge, the bearing edge being designed to come into contact with the bearing surface of an adjacent grate block in a feed direction, wherein the upper wall has an air supply opening formed by an air supply channel. The air supply opening is at least partially surrounded by a thickened portion which protrudes from the bearing surface, forms a protective channel extending the air supply channel, and is designed to prevent liquid from flowing into the air supply opening. A molded part for fastening to an upper wall of a block body of the grate block.

A grate block for a combustion grate including a block body having an upper wall which forms a bearing surface and along which the combustible material is to be conveyed and a front wall which has a lower bearing edge, the bearing edge being designed to come into contact with the bearing surface of an adjacent grate block in a feed direction, wherein the upper wall has an air supply opening formed by an air supply channel. The air supply opening is at least partially surrounded by a thickened portion which protrudes from the bearing surface, forms a protective channel extending the air supply channel, and is designed to prevent liquid from flowing into the air supply opening. A molded part for fastening to an upper wall of a block body of the grate block.

An improved fire grate may provide fresh oxygen rich air to a secondary combustion zone, created by the improved fire grate, of a combustion chamber where a combustion gas stream is typically oxygen starved assisting in the burning process of incompletely burned particulates and reducing other harmful emissions. A baffle plate may be introduced in the secondary combustion zone to increase a combustion chamber temperature, encourage mixing of oxygen starved air with oxygen rich air and increase a residence time of the combustion gas within the combustion chamber. These aspects of the baffle plate promote more efficient burning of the biomass/fuel. Additionally, log lighter(s) may be disposed in the secondary combustion zone to increase a temperature of the combustion chamber for the purposes of reducing harmful emissions. The improved fire grate may be horizontally and vertically adjusted to fit within different sized fireplace combustion chambers.

An improved fire grate may provide fresh oxygen rich air to a secondary combustion zone, created by the improved fire grate, of a combustion chamber where a combustion gas stream is typically oxygen starved assisting in the burning process of incompletely burned particulates and reducing other harmful emissions. A baffle plate may be introduced in the secondary combustion zone to increase a combustion chamber temperature, encourage mixing of oxygen starved air with oxygen rich air and increase a residence time of the combustion gas within the combustion chamber. These aspects of the baffle plate promote more efficient burning of the biomass/fuel. Additionally, log lighter(s) may be disposed in the secondary combustion zone to increase a temperature of the combustion chamber for the purposes of reducing harmful emissions. The improved fire grate may be horizontally and vertically adjusted to fit within different sized fireplace combustion chambers.

Various implementations include a combustor system including an inner wall, a fuel grate, an ash grinder, an igniter, and a fan. The inner wall defines a combustion chamber and has a longitudinal axis and first and second ends. The inner wall defines primary and secondary air inlets. The primary air inlets are defined closer than the secondary air inlets to the first end. The fuel grate is disposed within the combustion chamber between the primary and secondary air inlets and is configured to support fuel disposed within the combustion chamber. The ash grinder is disposed between the fuel grate and the secondary air inlets and is rotatable about the longitudinal axis relative to the fuel grate. The igniter provides energy to the combustion chamber. The fan is configured to cause air to flow from the primary and secondary air inlets through the second end of the combustion chamber.

Various implementations include a combustor system including an inner wall, a fuel grate, an ash grinder, an igniter, and a fan. The inner wall defines a combustion chamber and has a longitudinal axis and first and second ends. The inner wall defines primary and secondary air inlets. The primary air inlets are defined closer than the secondary air inlets to the first end. The fuel grate is disposed within the combustion chamber between the primary and secondary air inlets and is configured to support fuel disposed within the combustion chamber. The ash grinder is disposed between the fuel grate and the secondary air inlets and is rotatable about the longitudinal axis relative to the fuel grate. The igniter provides energy to the combustion chamber. The fan is configured to cause air to flow from the primary and secondary air inlets through the second end of the combustion chamber.