首页> 外国专利> METHOD FOR REDUCTION OF SLAGGING AND FOULING OF THE WATERWALLS AND OF THE FIREBOX AND SUPERHEATER AND REHEATER OF STEAM BOILERS WITH COAL COMBUSTION

METHOD FOR REDUCTION OF SLAGGING AND FOULING OF THE WATERWALLS AND OF THE FIREBOX AND SUPERHEATER AND REHEATER OF STEAM BOILERS WITH COAL COMBUSTION

机译:减少带有煤燃烧的蒸汽锅炉的水冷壁和火箱及过热器和再热器结垢的方法

摘要

The present invention is a method for reducing the slagging and fouling of the surfaces of the waterwalls, firebox, superheater, and reheater of the furnace of a coal-fired steam boiler. The process reduces the firebox exit temperature to below the specific ash melting temperature by injecting the following, either alone or in combination, into ports located in the upper section of the firebox: recirculated flue gas from downstream of the electrostatic precipitator, atomized water, or a sorbent water slurry. All of these materials have a lower temperature than the main flue gas or require additional heat for evaporation. Mixing these materials with the main flue gas from the furnace will not affect the coal combustion process, yet will reduce the temperature of any fly ash particles in the main flue gas to below the specific ash fusion temperature, and thus, prevent slagging and fouling within the furnace.
机译:本发明是一种减少燃煤蒸汽锅炉的炉子的水冷壁,燃烧室,过热器和再热器表面的结渣和结垢的方法。该方法通过将以下物质单独或组合注入到位于燃烧室上部的端口中,将燃烧室出口温度降至特定的灰烬熔化温度以下:来自静电除尘器下游的再循环烟气,雾化水或吸附剂水浆。所有这些材料的温度都低于主烟道气,或者需要额外的热量来蒸发。将这些材料与炉中的主要烟道气混合不会影响煤的燃烧过程,但会将主要烟道气中任何飞灰颗粒的温度降低到特定的烟灰熔融温度以下,从而防止炉渣和结垢。炉子。

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