Supercritical CO2 circular and elliptical tangential boiler furnace body with uniform thermal loads
A heat load, supercritical technology, applied in the direction of combustion air/fuel supply, lighting and heating equipment, non-flammable liquid/gas transportation, etc. temperature and other issues, to ensure safe and economical operation, reasonable structural design, and prolong service life.
Inactive Publication Date: 2020-08-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
However, due to the supercritical CO 2 The physical and chemical properties of the working fluid in the boiler have changed, the heat transfer performance is lower than that of conventional steam boilers, and the average heat absorption temperature is higher than that of conventional steam boilers. Therefore, the traditional boiler structure is not fully suitable for supercritical CO 2 boiler
Conventional coal-fired tangential boilers have a single furnace tangential structure, double furnaces and double tangent...
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[0025] Example: such as figure 1 As shown, this embodiment provides a supercritical CO with uniform heat load 2 Circular and elliptical tangential boiler body, including boiler furnace and air duct system, wherein, the boiler furnace includes ash hopper 1, burner chamber 2 and upper furnace 3 connected sequentially from bottom to top, the burner chamber 2 The cavity cross section is circular or elliptical, and the inner cavities of the ash hopper 1 and the upper furnace 3 are cube-shaped or cuboid, and are tangent to the inner cavity of the burner cavity 2; At least one layer of burner assembly is provided, and the above-mentioned burner assembly includes the first deflected secondary air nozzle 41, the primary air nozzle 42, the second deflected secondary air nozzle and Air jet 43 and DC secondary air nozzle 44; SOFA air nozzle 6 is provided on the wall of the above-mentioned burner cavity 2 above the burner assembly; the above-mentioned air path system includes a primary ai...
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The invention relates to a supercritical CO2 circular and elliptical tangential boiler furnace body with uniform thermal loads. A furnace hearth comprises a burner cavity. The cross section of an inner cavity of the burner cavity is circular or elliptical. At least one burner assembly is axially arranged in the burner cavity, and the burner assembly comprises a first deflection secondary air nozzle, a primary air nozzle, a second deflection secondary air nozzle and a direct current secondary air nozzle which are arranged in a spaced manner from bottom to top successively. A SOFA air nozzle isarranged on a cavity wall of the burner cavity. An air path system comprises a primary air fan, a secondary air fan, a coal mill and a secondary air distributor. An outlet of the primary air fan and apulverized coal outlet of the coal mill are connected to the primary air nozzle through a primary air pipe. An air outlet of the secondary air fan is connected to the first deflection secondary air nozzle, the second deflection secondary air nozzle, the direct current secondary air nozzle and the SOFA air nozzle separately. The supercritical CO2 circular and elliptical tangential boiler furnace body has the advantages that the thermal loads in the furnace hearth are uniformly distributed axially and radially, so that overtemperature of a heated surface of the boiler furnace is avoided.
Description
technical field [0001] The invention relates to the technical field of coal-fired boiler operation, in particular to a supercritical CO 2 Circular and elliptical cut-round boiler furnace body. Background technique [0002] Supercritical CO 2 Coal-fired power generation system has attracted extensive attention at home and abroad due to its advantages such as high power generation efficiency, compact system structure, and small turbine size. However, due to the supercritical CO 2 The physical and chemical properties of the working fluid in the boiler have changed, the heat transfer performance is lower than that of conventional steam boilers, and the average heat absorption temperature is higher than that of conventional steam boilers. Therefore, the traditional boiler structure is not fully suitable for supercritical CO 2 boiler. Conventional coal-fired tangential boilers have a single furnace tangential structure, double furnaces and double tangential circle structures, ...
Claims
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Login to view more IPC IPC(8): F23C5/32F23C7/00F23L1/00F23L5/02F23L9/00
CPCF23C5/32F23C7/002F23C2201/101F23C2201/20F23L1/00F23L5/02F23L9/00
Inventor 向军周敬朱萌赵志刚陈磊苏胜胡松汪一江龙徐俊
Owner HUAZHONG UNIV OF SCI & TECH
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