Combination pulverized fuel burner with integrated pilot burner
View Patent ↗The invention comprises a combination burner for the gasification of pulverized fuels with an oxidation means containing free oxygen at ambient or higher pressures, as well as temperatures between 800-1800° C., with the ignition device of the pilot burner with flame monitoring and the pulverized fuel burner being integrated as a combination burner and all operating channels being routed separately from each other up to the mouth of the burner and the media carried by the channels only being mixed at the mouth of the burner. When the pilot burner is dismantled the eddy bodies 14 attached to its sleeve in the main burner oxidation means supply 17 can be exchanged quickly and easily and thus the main burner flame adapted in the optimum way to the reaction chamber contour of the reactor.
1. A combination burner for the gasification of pulverized fuels with an oxidation component containing free oxygen for pressures between ambient pressure and high pressures of 80 bar and temperatures between 800-1800° C., comprising:
a centrally arranged tube that leads to a mouth portion of the burner;
an annular combustion gas channel arranged concentrically around the central tube that leads to the mouth of the burner that provides a combustion gas to the burner;
an annular oxidation component channel arranged concentrically around the annular combustion gas channel that leads to the mouth of the burner and provides an oxidation component to the burner;
an annular cooling channel arranged concentrically around the annular oxidation component channel that provides a coolant to the burner;
a pulverized fuel burner oxidation component annular channel arranged concentrically around the annular cooling channel that provides an oxidant to the burner;
a further annular coolant channel arranged concentrically around the pulverized fuel burner annular channel that provides a further coolant to the burner;
a pulverized fuel annular channel arranged concentrically around the further annular coolant channel that provides pulverized fuel to the burner; and
a second further annular coolant channel arranged concentrically around the pulverized fuel annular channel that provides a second further coolant flow.
2. The combination pulverized fuel burner as claimed in claim 1 , wherein the central tube supports an ignition tip electrically insulated from the burner.
3. The combination pulverized fuel burner as claimed in claim 2 , wherein the insulated ignition tip is insulated by a central tube separated into two tube sections and the tube sections are mechanically connected by a tubular, ceramic insulating body.
4. The combination pulverized fuel burner as claimed in claim 3 , wherein the central tube is a support for an insulated high-voltage ignition cable, where a metallic end of the high-voltage ignition cable connected to a section of the metallic central tube located in a vicinity of the mouth of the burner that carries the ignition tip.
5. The combination pulverized fuel burner as claimed in claim 4 , wherein the central tube has a pressurized optical viewing window for flame monitoring at an end facing the mouth of the burner and is flushable with an inert gas.
6. The combination pulverized fuel burner as claimed in claim 5 , wherein the annular oxidation component channel is closed off on the burner mouth side by an annular screw-in part with nozzle holes.
7. The combination pulverized fuel burner as claimed in claim 6 , wherein the combustion gas supply channel has a ceramic insulating cladding in the area of the constriction to the outlet nozzle.
8. The combination pulverized fuel burner as claimed in claim 7 , wherein the constriction of the combustion gas supply channel is implemented by the annular screw-in part having a central hole where the central hole has a smaller diameter than an internal diameter of the combustion gas supply channel.
9. The combination pulverized fuel burner as claimed in claim 8 , wherein a plurality of small holes are arranged in the screw-in part, which lead into the annular combustion gas channel in the immediate vicinity of the ignition tip.
10. The combination pulverized fuel burner as claimed in claim 9 , further comprising
a tube arranged around the annular coolant channel where the tube serves as a support for replaceable eddy bodies in the annular channel for the oxidation component of the burner.
11. The combination pulverized fuel burner as claimed in claim 10 , wherein the annular channel for the oxidation component of the pulverized fuel burner and the annular channel for the fuel of the pulverized fuel burner are arranged to be mutually interchangeable.